mirror of git://anongit.mindrot.org/openssh.git
3968 lines
107 KiB
C
3968 lines
107 KiB
C
/* $OpenBSD: ssh-keygen.c,v 1.472 2024/01/11 01:45:36 djm Exp $ */
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/*
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* Author: Tatu Ylonen <ylo@cs.hut.fi>
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* Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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* All rights reserved
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* Identity and host key generation and maintenance.
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*
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* As far as I am concerned, the code I have written for this software
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* can be used freely for any purpose. Any derived versions of this
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* software must be clearly marked as such, and if the derived work is
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* incompatible with the protocol description in the RFC file, it must be
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* called by a name other than "ssh" or "Secure Shell".
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*/
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#include "includes.h"
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#ifdef WITH_OPENSSL
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#include <openssl/evp.h>
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#include <openssl/pem.h>
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#include "openbsd-compat/openssl-compat.h"
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#endif
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#ifdef HAVE_STDINT_H
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# include <stdint.h>
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#endif
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#include <errno.h>
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#include <fcntl.h>
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#include <netdb.h>
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#ifdef HAVE_PATHS_H
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# include <paths.h>
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#endif
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#include <pwd.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <limits.h>
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#include <locale.h>
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#include <time.h>
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#include "xmalloc.h"
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#include "sshkey.h"
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#include "authfile.h"
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#include "sshbuf.h"
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#include "pathnames.h"
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#include "log.h"
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#include "misc.h"
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#include "match.h"
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#include "hostfile.h"
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#include "dns.h"
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#include "ssh.h"
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#include "ssh2.h"
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#include "ssherr.h"
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#include "ssh-pkcs11.h"
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#include "atomicio.h"
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#include "krl.h"
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#include "digest.h"
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#include "utf8.h"
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#include "authfd.h"
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#include "sshsig.h"
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#include "ssh-sk.h"
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#include "sk-api.h" /* XXX for SSH_SK_USER_PRESENCE_REQD; remove */
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#include "cipher.h"
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#define DEFAULT_KEY_TYPE_NAME "ed25519"
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/*
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* Default number of bits in the RSA, DSA and ECDSA keys. These value can be
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* overridden on the command line.
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*
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* These values, with the exception of DSA, provide security equivalent to at
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* least 128 bits of security according to NIST Special Publication 800-57:
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* Recommendation for Key Management Part 1 rev 4 section 5.6.1.
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* For DSA it (and FIPS-186-4 section 4.2) specifies that the only size for
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* which a 160bit hash is acceptable is 1kbit, and since ssh-dss specifies only
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* SHA1 we limit the DSA key size 1k bits.
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*/
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#define DEFAULT_BITS 3072
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#define DEFAULT_BITS_DSA 1024
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#define DEFAULT_BITS_ECDSA 256
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static int quiet = 0;
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/* Flag indicating that we just want to see the key fingerprint */
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static int print_fingerprint = 0;
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static int print_bubblebabble = 0;
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/* Hash algorithm to use for fingerprints. */
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static int fingerprint_hash = SSH_FP_HASH_DEFAULT;
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/* The identity file name, given on the command line or entered by the user. */
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static char identity_file[PATH_MAX];
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static int have_identity = 0;
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/* This is set to the passphrase if given on the command line. */
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static char *identity_passphrase = NULL;
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/* This is set to the new passphrase if given on the command line. */
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static char *identity_new_passphrase = NULL;
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/* Key type when certifying */
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static u_int cert_key_type = SSH2_CERT_TYPE_USER;
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/* "key ID" of signed key */
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static char *cert_key_id = NULL;
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/* Comma-separated list of principal names for certifying keys */
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static char *cert_principals = NULL;
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/* Validity period for certificates */
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static u_int64_t cert_valid_from = 0;
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static u_int64_t cert_valid_to = ~0ULL;
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/* Certificate options */
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#define CERTOPT_X_FWD (1)
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#define CERTOPT_AGENT_FWD (1<<1)
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#define CERTOPT_PORT_FWD (1<<2)
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#define CERTOPT_PTY (1<<3)
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#define CERTOPT_USER_RC (1<<4)
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#define CERTOPT_NO_REQUIRE_USER_PRESENCE (1<<5)
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#define CERTOPT_REQUIRE_VERIFY (1<<6)
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#define CERTOPT_DEFAULT (CERTOPT_X_FWD|CERTOPT_AGENT_FWD| \
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CERTOPT_PORT_FWD|CERTOPT_PTY|CERTOPT_USER_RC)
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static u_int32_t certflags_flags = CERTOPT_DEFAULT;
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static char *certflags_command = NULL;
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static char *certflags_src_addr = NULL;
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/* Arbitrary extensions specified by user */
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struct cert_ext {
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char *key;
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char *val;
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int crit;
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};
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static struct cert_ext *cert_ext;
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static size_t ncert_ext;
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/* Conversion to/from various formats */
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enum {
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FMT_RFC4716,
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FMT_PKCS8,
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FMT_PEM
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} convert_format = FMT_RFC4716;
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static char *key_type_name = NULL;
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/* Load key from this PKCS#11 provider */
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static char *pkcs11provider = NULL;
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/* FIDO/U2F provider to use */
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static char *sk_provider = NULL;
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/* Format for writing private keys */
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static int private_key_format = SSHKEY_PRIVATE_OPENSSH;
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/* Cipher for new-format private keys */
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static char *openssh_format_cipher = NULL;
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/* Number of KDF rounds to derive new format keys. */
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static int rounds = 0;
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/* argv0 */
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extern char *__progname;
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static char hostname[NI_MAXHOST];
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#ifdef WITH_OPENSSL
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/* moduli.c */
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int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *);
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int prime_test(FILE *, FILE *, u_int32_t, u_int32_t, char *, unsigned long,
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unsigned long);
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#endif
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static void
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type_bits_valid(int type, const char *name, u_int32_t *bitsp)
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{
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if (type == KEY_UNSPEC)
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fatal("unknown key type %s", key_type_name);
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if (*bitsp == 0) {
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#ifdef WITH_OPENSSL
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int nid;
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switch(type) {
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case KEY_DSA:
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*bitsp = DEFAULT_BITS_DSA;
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break;
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case KEY_ECDSA:
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if (name != NULL &&
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(nid = sshkey_ecdsa_nid_from_name(name)) > 0)
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*bitsp = sshkey_curve_nid_to_bits(nid);
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if (*bitsp == 0)
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*bitsp = DEFAULT_BITS_ECDSA;
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break;
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case KEY_RSA:
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*bitsp = DEFAULT_BITS;
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break;
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}
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#endif
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}
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#ifdef WITH_OPENSSL
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switch (type) {
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case KEY_DSA:
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if (*bitsp != 1024)
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fatal("Invalid DSA key length: must be 1024 bits");
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break;
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case KEY_RSA:
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if (*bitsp < SSH_RSA_MINIMUM_MODULUS_SIZE)
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fatal("Invalid RSA key length: minimum is %d bits",
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SSH_RSA_MINIMUM_MODULUS_SIZE);
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else if (*bitsp > OPENSSL_RSA_MAX_MODULUS_BITS)
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fatal("Invalid RSA key length: maximum is %d bits",
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OPENSSL_RSA_MAX_MODULUS_BITS);
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break;
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case KEY_ECDSA:
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if (sshkey_ecdsa_bits_to_nid(*bitsp) == -1)
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#ifdef OPENSSL_HAS_NISTP521
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fatal("Invalid ECDSA key length: valid lengths are "
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"256, 384 or 521 bits");
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#else
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fatal("Invalid ECDSA key length: valid lengths are "
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"256 or 384 bits");
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#endif
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}
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#endif
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}
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/*
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* Checks whether a file exists and, if so, asks the user whether they wish
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* to overwrite it.
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* Returns nonzero if the file does not already exist or if the user agrees to
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* overwrite, or zero otherwise.
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*/
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static int
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confirm_overwrite(const char *filename)
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{
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char yesno[3];
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struct stat st;
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if (stat(filename, &st) != 0)
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return 1;
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printf("%s already exists.\n", filename);
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printf("Overwrite (y/n)? ");
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fflush(stdout);
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if (fgets(yesno, sizeof(yesno), stdin) == NULL)
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return 0;
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if (yesno[0] != 'y' && yesno[0] != 'Y')
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return 0;
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return 1;
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}
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static void
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ask_filename(struct passwd *pw, const char *prompt)
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{
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char buf[1024];
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char *name = NULL;
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if (key_type_name == NULL)
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name = _PATH_SSH_CLIENT_ID_ED25519;
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else {
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switch (sshkey_type_from_name(key_type_name)) {
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#ifdef WITH_DSA
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case KEY_DSA_CERT:
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case KEY_DSA:
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name = _PATH_SSH_CLIENT_ID_DSA;
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break;
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#endif
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#ifdef OPENSSL_HAS_ECC
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case KEY_ECDSA_CERT:
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case KEY_ECDSA:
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name = _PATH_SSH_CLIENT_ID_ECDSA;
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break;
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case KEY_ECDSA_SK_CERT:
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case KEY_ECDSA_SK:
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name = _PATH_SSH_CLIENT_ID_ECDSA_SK;
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break;
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#endif
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case KEY_RSA_CERT:
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case KEY_RSA:
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name = _PATH_SSH_CLIENT_ID_RSA;
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break;
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case KEY_ED25519:
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case KEY_ED25519_CERT:
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name = _PATH_SSH_CLIENT_ID_ED25519;
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break;
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case KEY_ED25519_SK:
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case KEY_ED25519_SK_CERT:
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name = _PATH_SSH_CLIENT_ID_ED25519_SK;
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break;
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case KEY_XMSS:
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case KEY_XMSS_CERT:
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name = _PATH_SSH_CLIENT_ID_XMSS;
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break;
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default:
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fatal("bad key type");
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}
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}
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snprintf(identity_file, sizeof(identity_file),
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"%s/%s", pw->pw_dir, name);
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printf("%s (%s): ", prompt, identity_file);
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fflush(stdout);
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if (fgets(buf, sizeof(buf), stdin) == NULL)
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exit(1);
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buf[strcspn(buf, "\n")] = '\0';
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if (strcmp(buf, "") != 0)
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strlcpy(identity_file, buf, sizeof(identity_file));
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have_identity = 1;
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}
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static struct sshkey *
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load_identity(const char *filename, char **commentp)
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{
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char *pass;
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struct sshkey *prv;
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int r;
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if (commentp != NULL)
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*commentp = NULL;
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if ((r = sshkey_load_private(filename, "", &prv, commentp)) == 0)
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return prv;
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if (r != SSH_ERR_KEY_WRONG_PASSPHRASE)
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fatal_r(r, "Load key \"%s\"", filename);
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if (identity_passphrase)
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pass = xstrdup(identity_passphrase);
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else
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pass = read_passphrase("Enter passphrase: ", RP_ALLOW_STDIN);
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r = sshkey_load_private(filename, pass, &prv, commentp);
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freezero(pass, strlen(pass));
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if (r != 0)
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fatal_r(r, "Load key \"%s\"", filename);
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return prv;
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}
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#define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----"
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#define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----"
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#define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----"
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#define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb
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#ifdef WITH_OPENSSL
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static void
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do_convert_to_ssh2(struct passwd *pw, struct sshkey *k)
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{
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struct sshbuf *b;
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char comment[61], *b64;
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int r;
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if ((b = sshbuf_new()) == NULL)
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fatal_f("sshbuf_new failed");
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if ((r = sshkey_putb(k, b)) != 0)
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fatal_fr(r, "put key");
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if ((b64 = sshbuf_dtob64_string(b, 1)) == NULL)
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fatal_f("sshbuf_dtob64_string failed");
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/* Comment + surrounds must fit into 72 chars (RFC 4716 sec 3.3) */
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snprintf(comment, sizeof(comment),
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"%u-bit %s, converted by %s@%s from OpenSSH",
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sshkey_size(k), sshkey_type(k),
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pw->pw_name, hostname);
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sshkey_free(k);
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sshbuf_free(b);
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fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN);
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fprintf(stdout, "Comment: \"%s\"\n%s", comment, b64);
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fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END);
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free(b64);
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exit(0);
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}
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static void
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do_convert_to_pkcs8(struct sshkey *k)
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{
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switch (sshkey_type_plain(k->type)) {
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case KEY_RSA:
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if (!PEM_write_RSA_PUBKEY(stdout, k->rsa))
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fatal("PEM_write_RSA_PUBKEY failed");
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break;
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#ifdef WITH_DSA
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case KEY_DSA:
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if (!PEM_write_DSA_PUBKEY(stdout, k->dsa))
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fatal("PEM_write_DSA_PUBKEY failed");
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break;
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#endif
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#ifdef OPENSSL_HAS_ECC
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case KEY_ECDSA:
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if (!PEM_write_EC_PUBKEY(stdout, k->ecdsa))
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fatal("PEM_write_EC_PUBKEY failed");
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break;
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#endif
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default:
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fatal_f("unsupported key type %s", sshkey_type(k));
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}
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exit(0);
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}
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static void
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do_convert_to_pem(struct sshkey *k)
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{
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switch (sshkey_type_plain(k->type)) {
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case KEY_RSA:
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if (!PEM_write_RSAPublicKey(stdout, k->rsa))
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fatal("PEM_write_RSAPublicKey failed");
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break;
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#ifdef WITH_DSA
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case KEY_DSA:
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if (!PEM_write_DSA_PUBKEY(stdout, k->dsa))
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fatal("PEM_write_DSA_PUBKEY failed");
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break;
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#endif
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#ifdef OPENSSL_HAS_ECC
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case KEY_ECDSA:
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if (!PEM_write_EC_PUBKEY(stdout, k->ecdsa))
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fatal("PEM_write_EC_PUBKEY failed");
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break;
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#endif
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default:
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fatal_f("unsupported key type %s", sshkey_type(k));
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}
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exit(0);
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}
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static void
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do_convert_to(struct passwd *pw)
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{
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struct sshkey *k;
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struct stat st;
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int r;
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if (!have_identity)
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ask_filename(pw, "Enter file in which the key is");
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if (stat(identity_file, &st) == -1)
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fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
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if ((r = sshkey_load_public(identity_file, &k, NULL)) != 0)
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k = load_identity(identity_file, NULL);
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switch (convert_format) {
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case FMT_RFC4716:
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do_convert_to_ssh2(pw, k);
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break;
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case FMT_PKCS8:
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do_convert_to_pkcs8(k);
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break;
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case FMT_PEM:
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do_convert_to_pem(k);
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break;
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default:
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fatal_f("unknown key format %d", convert_format);
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}
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exit(0);
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}
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/*
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* This is almost exactly the bignum1 encoding, but with 32 bit for length
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* instead of 16.
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*/
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static void
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buffer_get_bignum_bits(struct sshbuf *b, BIGNUM *value)
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{
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u_int bytes, bignum_bits;
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int r;
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if ((r = sshbuf_get_u32(b, &bignum_bits)) != 0)
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fatal_fr(r, "parse");
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bytes = (bignum_bits + 7) / 8;
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if (sshbuf_len(b) < bytes)
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fatal_f("input buffer too small: need %d have %zu",
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bytes, sshbuf_len(b));
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if (BN_bin2bn(sshbuf_ptr(b), bytes, value) == NULL)
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fatal_f("BN_bin2bn failed");
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if ((r = sshbuf_consume(b, bytes)) != 0)
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fatal_fr(r, "consume");
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}
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static struct sshkey *
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do_convert_private_ssh2(struct sshbuf *b)
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{
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struct sshkey *key = NULL;
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char *type, *cipher;
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const char *alg = NULL;
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u_char e1, e2, e3, *sig = NULL, data[] = "abcde12345";
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int r, rlen, ktype;
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u_int magic, i1, i2, i3, i4;
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size_t slen;
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u_long e;
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#ifdef WITH_DSA
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BIGNUM *dsa_p = NULL, *dsa_q = NULL, *dsa_g = NULL;
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BIGNUM *dsa_pub_key = NULL, *dsa_priv_key = NULL;
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#endif
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BIGNUM *rsa_n = NULL, *rsa_e = NULL, *rsa_d = NULL;
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BIGNUM *rsa_p = NULL, *rsa_q = NULL, *rsa_iqmp = NULL;
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if ((r = sshbuf_get_u32(b, &magic)) != 0)
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fatal_fr(r, "parse magic");
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if (magic != SSH_COM_PRIVATE_KEY_MAGIC) {
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error("bad magic 0x%x != 0x%x", magic,
|
|
SSH_COM_PRIVATE_KEY_MAGIC);
|
|
return NULL;
|
|
}
|
|
if ((r = sshbuf_get_u32(b, &i1)) != 0 ||
|
|
(r = sshbuf_get_cstring(b, &type, NULL)) != 0 ||
|
|
(r = sshbuf_get_cstring(b, &cipher, NULL)) != 0 ||
|
|
(r = sshbuf_get_u32(b, &i2)) != 0 ||
|
|
(r = sshbuf_get_u32(b, &i3)) != 0 ||
|
|
(r = sshbuf_get_u32(b, &i4)) != 0)
|
|
fatal_fr(r, "parse");
|
|
debug("ignore (%d %d %d %d)", i1, i2, i3, i4);
|
|
if (strcmp(cipher, "none") != 0) {
|
|
error("unsupported cipher %s", cipher);
|
|
free(cipher);
|
|
free(type);
|
|
return NULL;
|
|
}
|
|
free(cipher);
|
|
|
|
if (strstr(type, "rsa")) {
|
|
ktype = KEY_RSA;
|
|
#ifdef WITH_DSA
|
|
} else if (strstr(type, "dsa")) {
|
|
ktype = KEY_DSA;
|
|
#endif
|
|
} else {
|
|
free(type);
|
|
return NULL;
|
|
}
|
|
if ((key = sshkey_new(ktype)) == NULL)
|
|
fatal("sshkey_new failed");
|
|
free(type);
|
|
|
|
switch (key->type) {
|
|
#ifdef WITH_DSA
|
|
case KEY_DSA:
|
|
if ((dsa_p = BN_new()) == NULL ||
|
|
(dsa_q = BN_new()) == NULL ||
|
|
(dsa_g = BN_new()) == NULL ||
|
|
(dsa_pub_key = BN_new()) == NULL ||
|
|
(dsa_priv_key = BN_new()) == NULL)
|
|
fatal_f("BN_new");
|
|
buffer_get_bignum_bits(b, dsa_p);
|
|
buffer_get_bignum_bits(b, dsa_g);
|
|
buffer_get_bignum_bits(b, dsa_q);
|
|
buffer_get_bignum_bits(b, dsa_pub_key);
|
|
buffer_get_bignum_bits(b, dsa_priv_key);
|
|
if (!DSA_set0_pqg(key->dsa, dsa_p, dsa_q, dsa_g))
|
|
fatal_f("DSA_set0_pqg failed");
|
|
dsa_p = dsa_q = dsa_g = NULL; /* transferred */
|
|
if (!DSA_set0_key(key->dsa, dsa_pub_key, dsa_priv_key))
|
|
fatal_f("DSA_set0_key failed");
|
|
dsa_pub_key = dsa_priv_key = NULL; /* transferred */
|
|
break;
|
|
#endif
|
|
case KEY_RSA:
|
|
if ((r = sshbuf_get_u8(b, &e1)) != 0 ||
|
|
(e1 < 30 && (r = sshbuf_get_u8(b, &e2)) != 0) ||
|
|
(e1 < 30 && (r = sshbuf_get_u8(b, &e3)) != 0))
|
|
fatal_fr(r, "parse RSA");
|
|
e = e1;
|
|
debug("e %lx", e);
|
|
if (e < 30) {
|
|
e <<= 8;
|
|
e += e2;
|
|
debug("e %lx", e);
|
|
e <<= 8;
|
|
e += e3;
|
|
debug("e %lx", e);
|
|
}
|
|
if ((rsa_e = BN_new()) == NULL)
|
|
fatal_f("BN_new");
|
|
if (!BN_set_word(rsa_e, e)) {
|
|
BN_clear_free(rsa_e);
|
|
sshkey_free(key);
|
|
return NULL;
|
|
}
|
|
if ((rsa_n = BN_new()) == NULL ||
|
|
(rsa_d = BN_new()) == NULL ||
|
|
(rsa_p = BN_new()) == NULL ||
|
|
(rsa_q = BN_new()) == NULL ||
|
|
(rsa_iqmp = BN_new()) == NULL)
|
|
fatal_f("BN_new");
|
|
buffer_get_bignum_bits(b, rsa_d);
|
|
buffer_get_bignum_bits(b, rsa_n);
|
|
buffer_get_bignum_bits(b, rsa_iqmp);
|
|
buffer_get_bignum_bits(b, rsa_q);
|
|
buffer_get_bignum_bits(b, rsa_p);
|
|
if (!RSA_set0_key(key->rsa, rsa_n, rsa_e, rsa_d))
|
|
fatal_f("RSA_set0_key failed");
|
|
rsa_n = rsa_e = rsa_d = NULL; /* transferred */
|
|
if (!RSA_set0_factors(key->rsa, rsa_p, rsa_q))
|
|
fatal_f("RSA_set0_factors failed");
|
|
rsa_p = rsa_q = NULL; /* transferred */
|
|
if ((r = ssh_rsa_complete_crt_parameters(key, rsa_iqmp)) != 0)
|
|
fatal_fr(r, "generate RSA parameters");
|
|
BN_clear_free(rsa_iqmp);
|
|
alg = "rsa-sha2-256";
|
|
break;
|
|
}
|
|
rlen = sshbuf_len(b);
|
|
if (rlen != 0)
|
|
error_f("remaining bytes in key blob %d", rlen);
|
|
|
|
/* try the key */
|
|
if ((r = sshkey_sign(key, &sig, &slen, data, sizeof(data),
|
|
alg, NULL, NULL, 0)) != 0)
|
|
error_fr(r, "signing with converted key failed");
|
|
else if ((r = sshkey_verify(key, sig, slen, data, sizeof(data),
|
|
alg, 0, NULL)) != 0)
|
|
error_fr(r, "verification with converted key failed");
|
|
if (r != 0) {
|
|
sshkey_free(key);
|
|
free(sig);
|
|
return NULL;
|
|
}
|
|
free(sig);
|
|
return key;
|
|
}
|
|
|
|
static int
|
|
get_line(FILE *fp, char *line, size_t len)
|
|
{
|
|
int c;
|
|
size_t pos = 0;
|
|
|
|
line[0] = '\0';
|
|
while ((c = fgetc(fp)) != EOF) {
|
|
if (pos >= len - 1)
|
|
fatal("input line too long.");
|
|
switch (c) {
|
|
case '\r':
|
|
c = fgetc(fp);
|
|
if (c != EOF && c != '\n' && ungetc(c, fp) == EOF)
|
|
fatal("unget: %s", strerror(errno));
|
|
return pos;
|
|
case '\n':
|
|
return pos;
|
|
}
|
|
line[pos++] = c;
|
|
line[pos] = '\0';
|
|
}
|
|
/* We reached EOF */
|
|
return -1;
|
|
}
|
|
|
|
static void
|
|
do_convert_from_ssh2(struct passwd *pw, struct sshkey **k, int *private)
|
|
{
|
|
int r, blen, escaped = 0;
|
|
u_int len;
|
|
char line[1024];
|
|
struct sshbuf *buf;
|
|
char encoded[8096];
|
|
FILE *fp;
|
|
|
|
if ((buf = sshbuf_new()) == NULL)
|
|
fatal("sshbuf_new failed");
|
|
if ((fp = fopen(identity_file, "r")) == NULL)
|
|
fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
|
|
encoded[0] = '\0';
|
|
while ((blen = get_line(fp, line, sizeof(line))) != -1) {
|
|
if (blen > 0 && line[blen - 1] == '\\')
|
|
escaped++;
|
|
if (strncmp(line, "----", 4) == 0 ||
|
|
strstr(line, ": ") != NULL) {
|
|
if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL)
|
|
*private = 1;
|
|
if (strstr(line, " END ") != NULL) {
|
|
break;
|
|
}
|
|
/* fprintf(stderr, "ignore: %s", line); */
|
|
continue;
|
|
}
|
|
if (escaped) {
|
|
escaped--;
|
|
/* fprintf(stderr, "escaped: %s", line); */
|
|
continue;
|
|
}
|
|
strlcat(encoded, line, sizeof(encoded));
|
|
}
|
|
len = strlen(encoded);
|
|
if (((len % 4) == 3) &&
|
|
(encoded[len-1] == '=') &&
|
|
(encoded[len-2] == '=') &&
|
|
(encoded[len-3] == '='))
|
|
encoded[len-3] = '\0';
|
|
if ((r = sshbuf_b64tod(buf, encoded)) != 0)
|
|
fatal_fr(r, "base64 decode");
|
|
if (*private) {
|
|
if ((*k = do_convert_private_ssh2(buf)) == NULL)
|
|
fatal_f("private key conversion failed");
|
|
} else if ((r = sshkey_fromb(buf, k)) != 0)
|
|
fatal_fr(r, "parse key");
|
|
sshbuf_free(buf);
|
|
fclose(fp);
|
|
}
|
|
|
|
static void
|
|
do_convert_from_pkcs8(struct sshkey **k, int *private)
|
|
{
|
|
EVP_PKEY *pubkey;
|
|
FILE *fp;
|
|
|
|
if ((fp = fopen(identity_file, "r")) == NULL)
|
|
fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
|
|
if ((pubkey = PEM_read_PUBKEY(fp, NULL, NULL, NULL)) == NULL) {
|
|
fatal_f("%s is not a recognised public key format",
|
|
identity_file);
|
|
}
|
|
fclose(fp);
|
|
switch (EVP_PKEY_base_id(pubkey)) {
|
|
case EVP_PKEY_RSA:
|
|
if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
|
|
fatal("sshkey_new failed");
|
|
(*k)->type = KEY_RSA;
|
|
(*k)->rsa = EVP_PKEY_get1_RSA(pubkey);
|
|
break;
|
|
#ifdef WITH_DSA
|
|
case EVP_PKEY_DSA:
|
|
if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
|
|
fatal("sshkey_new failed");
|
|
(*k)->type = KEY_DSA;
|
|
(*k)->dsa = EVP_PKEY_get1_DSA(pubkey);
|
|
break;
|
|
#endif
|
|
#ifdef OPENSSL_HAS_ECC
|
|
case EVP_PKEY_EC:
|
|
if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
|
|
fatal("sshkey_new failed");
|
|
(*k)->type = KEY_ECDSA;
|
|
(*k)->ecdsa = EVP_PKEY_get1_EC_KEY(pubkey);
|
|
(*k)->ecdsa_nid = sshkey_ecdsa_key_to_nid((*k)->ecdsa);
|
|
break;
|
|
#endif
|
|
default:
|
|
fatal_f("unsupported pubkey type %d",
|
|
EVP_PKEY_base_id(pubkey));
|
|
}
|
|
EVP_PKEY_free(pubkey);
|
|
return;
|
|
}
|
|
|
|
static void
|
|
do_convert_from_pem(struct sshkey **k, int *private)
|
|
{
|
|
FILE *fp;
|
|
RSA *rsa;
|
|
|
|
if ((fp = fopen(identity_file, "r")) == NULL)
|
|
fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
|
|
if ((rsa = PEM_read_RSAPublicKey(fp, NULL, NULL, NULL)) != NULL) {
|
|
if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
|
|
fatal("sshkey_new failed");
|
|
(*k)->type = KEY_RSA;
|
|
(*k)->rsa = rsa;
|
|
fclose(fp);
|
|
return;
|
|
}
|
|
fatal_f("unrecognised raw private key format");
|
|
}
|
|
|
|
static void
|
|
do_convert_from(struct passwd *pw)
|
|
{
|
|
struct sshkey *k = NULL;
|
|
int r, private = 0, ok = 0;
|
|
struct stat st;
|
|
|
|
if (!have_identity)
|
|
ask_filename(pw, "Enter file in which the key is");
|
|
if (stat(identity_file, &st) == -1)
|
|
fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
|
|
|
|
switch (convert_format) {
|
|
case FMT_RFC4716:
|
|
do_convert_from_ssh2(pw, &k, &private);
|
|
break;
|
|
case FMT_PKCS8:
|
|
do_convert_from_pkcs8(&k, &private);
|
|
break;
|
|
case FMT_PEM:
|
|
do_convert_from_pem(&k, &private);
|
|
break;
|
|
default:
|
|
fatal_f("unknown key format %d", convert_format);
|
|
}
|
|
|
|
if (!private) {
|
|
if ((r = sshkey_write(k, stdout)) == 0)
|
|
ok = 1;
|
|
if (ok)
|
|
fprintf(stdout, "\n");
|
|
} else {
|
|
switch (k->type) {
|
|
#ifdef WITH_DSA
|
|
case KEY_DSA:
|
|
ok = PEM_write_DSAPrivateKey(stdout, k->dsa, NULL,
|
|
NULL, 0, NULL, NULL);
|
|
break;
|
|
#endif
|
|
#ifdef OPENSSL_HAS_ECC
|
|
case KEY_ECDSA:
|
|
ok = PEM_write_ECPrivateKey(stdout, k->ecdsa, NULL,
|
|
NULL, 0, NULL, NULL);
|
|
break;
|
|
#endif
|
|
case KEY_RSA:
|
|
ok = PEM_write_RSAPrivateKey(stdout, k->rsa, NULL,
|
|
NULL, 0, NULL, NULL);
|
|
break;
|
|
default:
|
|
fatal_f("unsupported key type %s", sshkey_type(k));
|
|
}
|
|
}
|
|
|
|
if (!ok)
|
|
fatal("key write failed");
|
|
sshkey_free(k);
|
|
exit(0);
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
do_print_public(struct passwd *pw)
|
|
{
|
|
struct sshkey *prv;
|
|
struct stat st;
|
|
int r;
|
|
char *comment = NULL;
|
|
|
|
if (!have_identity)
|
|
ask_filename(pw, "Enter file in which the key is");
|
|
if (stat(identity_file, &st) == -1)
|
|
fatal("%s: %s", identity_file, strerror(errno));
|
|
prv = load_identity(identity_file, &comment);
|
|
if ((r = sshkey_write(prv, stdout)) != 0)
|
|
fatal_fr(r, "write key");
|
|
if (comment != NULL && *comment != '\0')
|
|
fprintf(stdout, " %s", comment);
|
|
fprintf(stdout, "\n");
|
|
if (sshkey_is_sk(prv)) {
|
|
debug("sk_application: \"%s\", sk_flags 0x%02x",
|
|
prv->sk_application, prv->sk_flags);
|
|
}
|
|
sshkey_free(prv);
|
|
free(comment);
|
|
exit(0);
|
|
}
|
|
|
|
static void
|
|
do_download(struct passwd *pw)
|
|
{
|
|
#ifdef ENABLE_PKCS11
|
|
struct sshkey **keys = NULL;
|
|
int i, nkeys;
|
|
enum sshkey_fp_rep rep;
|
|
int fptype;
|
|
char *fp, *ra, **comments = NULL;
|
|
|
|
fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash;
|
|
rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT;
|
|
|
|
pkcs11_init(1);
|
|
nkeys = pkcs11_add_provider(pkcs11provider, NULL, &keys, &comments);
|
|
if (nkeys <= 0)
|
|
fatal("cannot read public key from pkcs11");
|
|
for (i = 0; i < nkeys; i++) {
|
|
if (print_fingerprint) {
|
|
fp = sshkey_fingerprint(keys[i], fptype, rep);
|
|
ra = sshkey_fingerprint(keys[i], fingerprint_hash,
|
|
SSH_FP_RANDOMART);
|
|
if (fp == NULL || ra == NULL)
|
|
fatal_f("sshkey_fingerprint fail");
|
|
printf("%u %s %s (PKCS11 key)\n", sshkey_size(keys[i]),
|
|
fp, sshkey_type(keys[i]));
|
|
if (log_level_get() >= SYSLOG_LEVEL_VERBOSE)
|
|
printf("%s\n", ra);
|
|
free(ra);
|
|
free(fp);
|
|
} else {
|
|
(void) sshkey_write(keys[i], stdout); /* XXX check */
|
|
fprintf(stdout, "%s%s\n",
|
|
*(comments[i]) == '\0' ? "" : " ", comments[i]);
|
|
}
|
|
free(comments[i]);
|
|
sshkey_free(keys[i]);
|
|
}
|
|
free(comments);
|
|
free(keys);
|
|
pkcs11_terminate();
|
|
exit(0);
|
|
#else
|
|
fatal("no pkcs11 support");
|
|
#endif /* ENABLE_PKCS11 */
|
|
}
|
|
|
|
static struct sshkey *
|
|
try_read_key(char **cpp)
|
|
{
|
|
struct sshkey *ret;
|
|
int r;
|
|
|
|
if ((ret = sshkey_new(KEY_UNSPEC)) == NULL)
|
|
fatal("sshkey_new failed");
|
|
if ((r = sshkey_read(ret, cpp)) == 0)
|
|
return ret;
|
|
/* Not a key */
|
|
sshkey_free(ret);
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
fingerprint_one_key(const struct sshkey *public, const char *comment)
|
|
{
|
|
char *fp = NULL, *ra = NULL;
|
|
enum sshkey_fp_rep rep;
|
|
int fptype;
|
|
|
|
fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash;
|
|
rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT;
|
|
fp = sshkey_fingerprint(public, fptype, rep);
|
|
ra = sshkey_fingerprint(public, fingerprint_hash, SSH_FP_RANDOMART);
|
|
if (fp == NULL || ra == NULL)
|
|
fatal_f("sshkey_fingerprint failed");
|
|
mprintf("%u %s %s (%s)\n", sshkey_size(public), fp,
|
|
comment ? comment : "no comment", sshkey_type(public));
|
|
if (log_level_get() >= SYSLOG_LEVEL_VERBOSE)
|
|
printf("%s\n", ra);
|
|
free(ra);
|
|
free(fp);
|
|
}
|
|
|
|
static void
|
|
fingerprint_private(const char *path)
|
|
{
|
|
struct stat st;
|
|
char *comment = NULL;
|
|
struct sshkey *privkey = NULL, *pubkey = NULL;
|
|
int r;
|
|
|
|
if (stat(identity_file, &st) == -1)
|
|
fatal("%s: %s", path, strerror(errno));
|
|
if ((r = sshkey_load_public(path, &pubkey, &comment)) != 0)
|
|
debug_r(r, "load public \"%s\"", path);
|
|
if (pubkey == NULL || comment == NULL || *comment == '\0') {
|
|
free(comment);
|
|
if ((r = sshkey_load_private(path, NULL,
|
|
&privkey, &comment)) != 0)
|
|
debug_r(r, "load private \"%s\"", path);
|
|
}
|
|
if (pubkey == NULL && privkey == NULL)
|
|
fatal("%s is not a key file.", path);
|
|
|
|
fingerprint_one_key(pubkey == NULL ? privkey : pubkey, comment);
|
|
sshkey_free(pubkey);
|
|
sshkey_free(privkey);
|
|
free(comment);
|
|
}
|
|
|
|
static void
|
|
do_fingerprint(struct passwd *pw)
|
|
{
|
|
FILE *f;
|
|
struct sshkey *public = NULL;
|
|
char *comment = NULL, *cp, *ep, *line = NULL;
|
|
size_t linesize = 0;
|
|
int i, invalid = 1;
|
|
const char *path;
|
|
u_long lnum = 0;
|
|
|
|
if (!have_identity)
|
|
ask_filename(pw, "Enter file in which the key is");
|
|
path = identity_file;
|
|
|
|
if (strcmp(identity_file, "-") == 0) {
|
|
f = stdin;
|
|
path = "(stdin)";
|
|
} else if ((f = fopen(path, "r")) == NULL)
|
|
fatal("%s: %s: %s", __progname, path, strerror(errno));
|
|
|
|
while (getline(&line, &linesize, f) != -1) {
|
|
lnum++;
|
|
cp = line;
|
|
cp[strcspn(cp, "\n")] = '\0';
|
|
/* Trim leading space and comments */
|
|
cp = line + strspn(line, " \t");
|
|
if (*cp == '#' || *cp == '\0')
|
|
continue;
|
|
|
|
/*
|
|
* Input may be plain keys, private keys, authorized_keys
|
|
* or known_hosts.
|
|
*/
|
|
|
|
/*
|
|
* Try private keys first. Assume a key is private if
|
|
* "SSH PRIVATE KEY" appears on the first line and we're
|
|
* not reading from stdin (XXX support private keys on stdin).
|
|
*/
|
|
if (lnum == 1 && strcmp(identity_file, "-") != 0 &&
|
|
strstr(cp, "PRIVATE KEY") != NULL) {
|
|
free(line);
|
|
fclose(f);
|
|
fingerprint_private(path);
|
|
exit(0);
|
|
}
|
|
|
|
/*
|
|
* If it's not a private key, then this must be prepared to
|
|
* accept a public key prefixed with a hostname or options.
|
|
* Try a bare key first, otherwise skip the leading stuff.
|
|
*/
|
|
comment = NULL;
|
|
if ((public = try_read_key(&cp)) == NULL) {
|
|
i = strtol(cp, &ep, 10);
|
|
if (i == 0 || ep == NULL ||
|
|
(*ep != ' ' && *ep != '\t')) {
|
|
int quoted = 0;
|
|
|
|
comment = cp;
|
|
for (; *cp && (quoted || (*cp != ' ' &&
|
|
*cp != '\t')); cp++) {
|
|
if (*cp == '\\' && cp[1] == '"')
|
|
cp++; /* Skip both */
|
|
else if (*cp == '"')
|
|
quoted = !quoted;
|
|
}
|
|
if (!*cp)
|
|
continue;
|
|
*cp++ = '\0';
|
|
}
|
|
}
|
|
/* Retry after parsing leading hostname/key options */
|
|
if (public == NULL && (public = try_read_key(&cp)) == NULL) {
|
|
debug("%s:%lu: not a public key", path, lnum);
|
|
continue;
|
|
}
|
|
|
|
/* Find trailing comment, if any */
|
|
for (; *cp == ' ' || *cp == '\t'; cp++)
|
|
;
|
|
if (*cp != '\0' && *cp != '#')
|
|
comment = cp;
|
|
|
|
fingerprint_one_key(public, comment);
|
|
sshkey_free(public);
|
|
invalid = 0; /* One good key in the file is sufficient */
|
|
}
|
|
fclose(f);
|
|
free(line);
|
|
|
|
if (invalid)
|
|
fatal("%s is not a public key file.", path);
|
|
exit(0);
|
|
}
|
|
|
|
static void
|
|
do_gen_all_hostkeys(struct passwd *pw)
|
|
{
|
|
struct {
|
|
char *key_type;
|
|
char *key_type_display;
|
|
char *path;
|
|
} key_types[] = {
|
|
#ifdef WITH_OPENSSL
|
|
{ "rsa", "RSA" ,_PATH_HOST_RSA_KEY_FILE },
|
|
#ifdef OPENSSL_HAS_ECC
|
|
{ "ecdsa", "ECDSA",_PATH_HOST_ECDSA_KEY_FILE },
|
|
#endif /* OPENSSL_HAS_ECC */
|
|
#endif /* WITH_OPENSSL */
|
|
{ "ed25519", "ED25519",_PATH_HOST_ED25519_KEY_FILE },
|
|
#ifdef WITH_XMSS
|
|
{ "xmss", "XMSS",_PATH_HOST_XMSS_KEY_FILE },
|
|
#endif /* WITH_XMSS */
|
|
{ NULL, NULL, NULL }
|
|
};
|
|
|
|
u_int32_t bits = 0;
|
|
int first = 0;
|
|
struct stat st;
|
|
struct sshkey *private, *public;
|
|
char comment[1024], *prv_tmp, *pub_tmp, *prv_file, *pub_file;
|
|
int i, type, fd, r;
|
|
|
|
for (i = 0; key_types[i].key_type; i++) {
|
|
public = private = NULL;
|
|
prv_tmp = pub_tmp = prv_file = pub_file = NULL;
|
|
|
|
xasprintf(&prv_file, "%s%s",
|
|
identity_file, key_types[i].path);
|
|
|
|
/* Check whether private key exists and is not zero-length */
|
|
if (stat(prv_file, &st) == 0) {
|
|
if (st.st_size != 0)
|
|
goto next;
|
|
} else if (errno != ENOENT) {
|
|
error("Could not stat %s: %s", key_types[i].path,
|
|
strerror(errno));
|
|
goto failnext;
|
|
}
|
|
|
|
/*
|
|
* Private key doesn't exist or is invalid; proceed with
|
|
* key generation.
|
|
*/
|
|
xasprintf(&prv_tmp, "%s%s.XXXXXXXXXX",
|
|
identity_file, key_types[i].path);
|
|
xasprintf(&pub_tmp, "%s%s.pub.XXXXXXXXXX",
|
|
identity_file, key_types[i].path);
|
|
xasprintf(&pub_file, "%s%s.pub",
|
|
identity_file, key_types[i].path);
|
|
|
|
if (first == 0) {
|
|
first = 1;
|
|
printf("%s: generating new host keys: ", __progname);
|
|
}
|
|
printf("%s ", key_types[i].key_type_display);
|
|
fflush(stdout);
|
|
type = sshkey_type_from_name(key_types[i].key_type);
|
|
if ((fd = mkstemp(prv_tmp)) == -1) {
|
|
error("Could not save your private key in %s: %s",
|
|
prv_tmp, strerror(errno));
|
|
goto failnext;
|
|
}
|
|
(void)close(fd); /* just using mkstemp() to reserve a name */
|
|
bits = 0;
|
|
type_bits_valid(type, NULL, &bits);
|
|
if ((r = sshkey_generate(type, bits, &private)) != 0) {
|
|
error_r(r, "sshkey_generate failed");
|
|
goto failnext;
|
|
}
|
|
if ((r = sshkey_from_private(private, &public)) != 0)
|
|
fatal_fr(r, "sshkey_from_private");
|
|
snprintf(comment, sizeof comment, "%s@%s", pw->pw_name,
|
|
hostname);
|
|
if ((r = sshkey_save_private(private, prv_tmp, "",
|
|
comment, private_key_format, openssh_format_cipher,
|
|
rounds)) != 0) {
|
|
error_r(r, "Saving key \"%s\" failed", prv_tmp);
|
|
goto failnext;
|
|
}
|
|
if ((fd = mkstemp(pub_tmp)) == -1) {
|
|
error("Could not save your public key in %s: %s",
|
|
pub_tmp, strerror(errno));
|
|
goto failnext;
|
|
}
|
|
(void)fchmod(fd, 0644);
|
|
(void)close(fd);
|
|
if ((r = sshkey_save_public(public, pub_tmp, comment)) != 0) {
|
|
error_r(r, "Unable to save public key to %s",
|
|
identity_file);
|
|
goto failnext;
|
|
}
|
|
|
|
/* Rename temporary files to their permanent locations. */
|
|
if (rename(pub_tmp, pub_file) != 0) {
|
|
error("Unable to move %s into position: %s",
|
|
pub_file, strerror(errno));
|
|
goto failnext;
|
|
}
|
|
if (rename(prv_tmp, prv_file) != 0) {
|
|
error("Unable to move %s into position: %s",
|
|
key_types[i].path, strerror(errno));
|
|
failnext:
|
|
first = 0;
|
|
goto next;
|
|
}
|
|
next:
|
|
sshkey_free(private);
|
|
sshkey_free(public);
|
|
free(prv_tmp);
|
|
free(pub_tmp);
|
|
free(prv_file);
|
|
free(pub_file);
|
|
}
|
|
if (first != 0)
|
|
printf("\n");
|
|
}
|
|
|
|
struct known_hosts_ctx {
|
|
const char *host; /* Hostname searched for in find/delete case */
|
|
FILE *out; /* Output file, stdout for find_hosts case */
|
|
int has_unhashed; /* When hashing, original had unhashed hosts */
|
|
int found_key; /* For find/delete, host was found */
|
|
int invalid; /* File contained invalid items; don't delete */
|
|
int hash_hosts; /* Hash hostnames as we go */
|
|
int find_host; /* Search for specific hostname */
|
|
int delete_host; /* Delete host from known_hosts */
|
|
};
|
|
|
|
static int
|
|
known_hosts_hash(struct hostkey_foreach_line *l, void *_ctx)
|
|
{
|
|
struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx;
|
|
char *hashed, *cp, *hosts, *ohosts;
|
|
int has_wild = l->hosts && strcspn(l->hosts, "*?!") != strlen(l->hosts);
|
|
int was_hashed = l->hosts && l->hosts[0] == HASH_DELIM;
|
|
|
|
switch (l->status) {
|
|
case HKF_STATUS_OK:
|
|
case HKF_STATUS_MATCHED:
|
|
/*
|
|
* Don't hash hosts already hashed, with wildcard
|
|
* characters or a CA/revocation marker.
|
|
*/
|
|
if (was_hashed || has_wild || l->marker != MRK_NONE) {
|
|
fprintf(ctx->out, "%s\n", l->line);
|
|
if (has_wild && !ctx->find_host) {
|
|
logit("%s:%lu: ignoring host name "
|
|
"with wildcard: %.64s", l->path,
|
|
l->linenum, l->hosts);
|
|
}
|
|
return 0;
|
|
}
|
|
/*
|
|
* Split any comma-separated hostnames from the host list,
|
|
* hash and store separately.
|
|
*/
|
|
ohosts = hosts = xstrdup(l->hosts);
|
|
while ((cp = strsep(&hosts, ",")) != NULL && *cp != '\0') {
|
|
lowercase(cp);
|
|
if ((hashed = host_hash(cp, NULL, 0)) == NULL)
|
|
fatal("hash_host failed");
|
|
fprintf(ctx->out, "%s %s\n", hashed, l->rawkey);
|
|
free(hashed);
|
|
ctx->has_unhashed = 1;
|
|
}
|
|
free(ohosts);
|
|
return 0;
|
|
case HKF_STATUS_INVALID:
|
|
/* Retain invalid lines, but mark file as invalid. */
|
|
ctx->invalid = 1;
|
|
logit("%s:%lu: invalid line", l->path, l->linenum);
|
|
/* FALLTHROUGH */
|
|
default:
|
|
fprintf(ctx->out, "%s\n", l->line);
|
|
return 0;
|
|
}
|
|
/* NOTREACHED */
|
|
return -1;
|
|
}
|
|
|
|
static int
|
|
known_hosts_find_delete(struct hostkey_foreach_line *l, void *_ctx)
|
|
{
|
|
struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx;
|
|
enum sshkey_fp_rep rep;
|
|
int fptype;
|
|
char *fp = NULL, *ra = NULL;
|
|
|
|
fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash;
|
|
rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT;
|
|
|
|
if (l->status == HKF_STATUS_MATCHED) {
|
|
if (ctx->delete_host) {
|
|
if (l->marker != MRK_NONE) {
|
|
/* Don't remove CA and revocation lines */
|
|
fprintf(ctx->out, "%s\n", l->line);
|
|
} else {
|
|
/*
|
|
* Hostname matches and has no CA/revoke
|
|
* marker, delete it by *not* writing the
|
|
* line to ctx->out.
|
|
*/
|
|
ctx->found_key = 1;
|
|
if (!quiet)
|
|
printf("# Host %s found: line %lu\n",
|
|
ctx->host, l->linenum);
|
|
}
|
|
return 0;
|
|
} else if (ctx->find_host) {
|
|
ctx->found_key = 1;
|
|
if (!quiet) {
|
|
printf("# Host %s found: line %lu %s\n",
|
|
ctx->host,
|
|
l->linenum, l->marker == MRK_CA ? "CA" :
|
|
(l->marker == MRK_REVOKE ? "REVOKED" : ""));
|
|
}
|
|
if (ctx->hash_hosts)
|
|
known_hosts_hash(l, ctx);
|
|
else if (print_fingerprint) {
|
|
fp = sshkey_fingerprint(l->key, fptype, rep);
|
|
ra = sshkey_fingerprint(l->key,
|
|
fingerprint_hash, SSH_FP_RANDOMART);
|
|
if (fp == NULL || ra == NULL)
|
|
fatal_f("sshkey_fingerprint failed");
|
|
mprintf("%s %s %s%s%s\n", ctx->host,
|
|
sshkey_type(l->key), fp,
|
|
l->comment[0] ? " " : "",
|
|
l->comment);
|
|
if (log_level_get() >= SYSLOG_LEVEL_VERBOSE)
|
|
printf("%s\n", ra);
|
|
free(ra);
|
|
free(fp);
|
|
} else
|
|
fprintf(ctx->out, "%s\n", l->line);
|
|
return 0;
|
|
}
|
|
} else if (ctx->delete_host) {
|
|
/* Retain non-matching hosts when deleting */
|
|
if (l->status == HKF_STATUS_INVALID) {
|
|
ctx->invalid = 1;
|
|
logit("%s:%lu: invalid line", l->path, l->linenum);
|
|
}
|
|
fprintf(ctx->out, "%s\n", l->line);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
do_known_hosts(struct passwd *pw, const char *name, int find_host,
|
|
int delete_host, int hash_hosts)
|
|
{
|
|
char *cp, tmp[PATH_MAX], old[PATH_MAX];
|
|
int r, fd, oerrno, inplace = 0;
|
|
struct known_hosts_ctx ctx;
|
|
u_int foreach_options;
|
|
struct stat sb;
|
|
|
|
if (!have_identity) {
|
|
cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid);
|
|
if (strlcpy(identity_file, cp, sizeof(identity_file)) >=
|
|
sizeof(identity_file))
|
|
fatal("Specified known hosts path too long");
|
|
free(cp);
|
|
have_identity = 1;
|
|
}
|
|
if (stat(identity_file, &sb) != 0)
|
|
fatal("Cannot stat %s: %s", identity_file, strerror(errno));
|
|
|
|
memset(&ctx, 0, sizeof(ctx));
|
|
ctx.out = stdout;
|
|
ctx.host = name;
|
|
ctx.hash_hosts = hash_hosts;
|
|
ctx.find_host = find_host;
|
|
ctx.delete_host = delete_host;
|
|
|
|
/*
|
|
* Find hosts goes to stdout, hash and deletions happen in-place
|
|
* A corner case is ssh-keygen -HF foo, which should go to stdout
|
|
*/
|
|
if (!find_host && (hash_hosts || delete_host)) {
|
|
if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) ||
|
|
strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) ||
|
|
strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) ||
|
|
strlcat(old, ".old", sizeof(old)) >= sizeof(old))
|
|
fatal("known_hosts path too long");
|
|
umask(077);
|
|
if ((fd = mkstemp(tmp)) == -1)
|
|
fatal("mkstemp: %s", strerror(errno));
|
|
if ((ctx.out = fdopen(fd, "w")) == NULL) {
|
|
oerrno = errno;
|
|
unlink(tmp);
|
|
fatal("fdopen: %s", strerror(oerrno));
|
|
}
|
|
(void)fchmod(fd, sb.st_mode & 0644);
|
|
inplace = 1;
|
|
}
|
|
/* XXX support identity_file == "-" for stdin */
|
|
foreach_options = find_host ? HKF_WANT_MATCH : 0;
|
|
foreach_options |= print_fingerprint ? HKF_WANT_PARSE_KEY : 0;
|
|
if ((r = hostkeys_foreach(identity_file, (find_host || !hash_hosts) ?
|
|
known_hosts_find_delete : known_hosts_hash, &ctx, name, NULL,
|
|
foreach_options, 0)) != 0) {
|
|
if (inplace)
|
|
unlink(tmp);
|
|
fatal_fr(r, "hostkeys_foreach");
|
|
}
|
|
|
|
if (inplace)
|
|
fclose(ctx.out);
|
|
|
|
if (ctx.invalid) {
|
|
error("%s is not a valid known_hosts file.", identity_file);
|
|
if (inplace) {
|
|
error("Not replacing existing known_hosts "
|
|
"file because of errors");
|
|
unlink(tmp);
|
|
}
|
|
exit(1);
|
|
} else if (delete_host && !ctx.found_key) {
|
|
logit("Host %s not found in %s", name, identity_file);
|
|
if (inplace)
|
|
unlink(tmp);
|
|
} else if (inplace) {
|
|
/* Backup existing file */
|
|
if (unlink(old) == -1 && errno != ENOENT)
|
|
fatal("unlink %.100s: %s", old, strerror(errno));
|
|
if (link(identity_file, old) == -1)
|
|
fatal("link %.100s to %.100s: %s", identity_file, old,
|
|
strerror(errno));
|
|
/* Move new one into place */
|
|
if (rename(tmp, identity_file) == -1) {
|
|
error("rename\"%s\" to \"%s\": %s", tmp, identity_file,
|
|
strerror(errno));
|
|
unlink(tmp);
|
|
unlink(old);
|
|
exit(1);
|
|
}
|
|
|
|
printf("%s updated.\n", identity_file);
|
|
printf("Original contents retained as %s\n", old);
|
|
if (ctx.has_unhashed) {
|
|
logit("WARNING: %s contains unhashed entries", old);
|
|
logit("Delete this file to ensure privacy "
|
|
"of hostnames");
|
|
}
|
|
}
|
|
|
|
exit (find_host && !ctx.found_key);
|
|
}
|
|
|
|
/*
|
|
* Perform changing a passphrase. The argument is the passwd structure
|
|
* for the current user.
|
|
*/
|
|
static void
|
|
do_change_passphrase(struct passwd *pw)
|
|
{
|
|
char *comment;
|
|
char *old_passphrase, *passphrase1, *passphrase2;
|
|
struct stat st;
|
|
struct sshkey *private;
|
|
int r;
|
|
|
|
if (!have_identity)
|
|
ask_filename(pw, "Enter file in which the key is");
|
|
if (stat(identity_file, &st) == -1)
|
|
fatal("%s: %s", identity_file, strerror(errno));
|
|
/* Try to load the file with empty passphrase. */
|
|
r = sshkey_load_private(identity_file, "", &private, &comment);
|
|
if (r == SSH_ERR_KEY_WRONG_PASSPHRASE) {
|
|
if (identity_passphrase)
|
|
old_passphrase = xstrdup(identity_passphrase);
|
|
else
|
|
old_passphrase =
|
|
read_passphrase("Enter old passphrase: ",
|
|
RP_ALLOW_STDIN);
|
|
r = sshkey_load_private(identity_file, old_passphrase,
|
|
&private, &comment);
|
|
freezero(old_passphrase, strlen(old_passphrase));
|
|
if (r != 0)
|
|
goto badkey;
|
|
} else if (r != 0) {
|
|
badkey:
|
|
fatal_r(r, "Failed to load key %s", identity_file);
|
|
}
|
|
if (comment)
|
|
mprintf("Key has comment '%s'\n", comment);
|
|
|
|
/* Ask the new passphrase (twice). */
|
|
if (identity_new_passphrase) {
|
|
passphrase1 = xstrdup(identity_new_passphrase);
|
|
passphrase2 = NULL;
|
|
} else {
|
|
passphrase1 =
|
|
read_passphrase("Enter new passphrase (empty for no "
|
|
"passphrase): ", RP_ALLOW_STDIN);
|
|
passphrase2 = read_passphrase("Enter same passphrase again: ",
|
|
RP_ALLOW_STDIN);
|
|
|
|
/* Verify that they are the same. */
|
|
if (strcmp(passphrase1, passphrase2) != 0) {
|
|
explicit_bzero(passphrase1, strlen(passphrase1));
|
|
explicit_bzero(passphrase2, strlen(passphrase2));
|
|
free(passphrase1);
|
|
free(passphrase2);
|
|
printf("Pass phrases do not match. Try again.\n");
|
|
exit(1);
|
|
}
|
|
/* Destroy the other copy. */
|
|
freezero(passphrase2, strlen(passphrase2));
|
|
}
|
|
|
|
/* Save the file using the new passphrase. */
|
|
if ((r = sshkey_save_private(private, identity_file, passphrase1,
|
|
comment, private_key_format, openssh_format_cipher, rounds)) != 0) {
|
|
error_r(r, "Saving key \"%s\" failed", identity_file);
|
|
freezero(passphrase1, strlen(passphrase1));
|
|
sshkey_free(private);
|
|
free(comment);
|
|
exit(1);
|
|
}
|
|
/* Destroy the passphrase and the copy of the key in memory. */
|
|
freezero(passphrase1, strlen(passphrase1));
|
|
sshkey_free(private); /* Destroys contents */
|
|
free(comment);
|
|
|
|
printf("Your identification has been saved with the new passphrase.\n");
|
|
exit(0);
|
|
}
|
|
|
|
/*
|
|
* Print the SSHFP RR.
|
|
*/
|
|
static int
|
|
do_print_resource_record(struct passwd *pw, char *fname, char *hname,
|
|
int print_generic, char * const *opts, size_t nopts)
|
|
{
|
|
struct sshkey *public;
|
|
char *comment = NULL;
|
|
struct stat st;
|
|
int r, hash = -1;
|
|
size_t i;
|
|
|
|
for (i = 0; i < nopts; i++) {
|
|
if (strncasecmp(opts[i], "hashalg=", 8) == 0) {
|
|
if ((hash = ssh_digest_alg_by_name(opts[i] + 8)) == -1)
|
|
fatal("Unsupported hash algorithm");
|
|
} else {
|
|
error("Invalid option \"%s\"", opts[i]);
|
|
return SSH_ERR_INVALID_ARGUMENT;
|
|
}
|
|
}
|
|
if (fname == NULL)
|
|
fatal_f("no filename");
|
|
if (stat(fname, &st) == -1) {
|
|
if (errno == ENOENT)
|
|
return 0;
|
|
fatal("%s: %s", fname, strerror(errno));
|
|
}
|
|
if ((r = sshkey_load_public(fname, &public, &comment)) != 0)
|
|
fatal_r(r, "Failed to read v2 public key from \"%s\"", fname);
|
|
export_dns_rr(hname, public, stdout, print_generic, hash);
|
|
sshkey_free(public);
|
|
free(comment);
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Change the comment of a private key file.
|
|
*/
|
|
static void
|
|
do_change_comment(struct passwd *pw, const char *identity_comment)
|
|
{
|
|
char new_comment[1024], *comment, *passphrase;
|
|
struct sshkey *private;
|
|
struct sshkey *public;
|
|
struct stat st;
|
|
int r;
|
|
|
|
if (!have_identity)
|
|
ask_filename(pw, "Enter file in which the key is");
|
|
if (stat(identity_file, &st) == -1)
|
|
fatal("%s: %s", identity_file, strerror(errno));
|
|
if ((r = sshkey_load_private(identity_file, "",
|
|
&private, &comment)) == 0)
|
|
passphrase = xstrdup("");
|
|
else if (r != SSH_ERR_KEY_WRONG_PASSPHRASE)
|
|
fatal_r(r, "Cannot load private key \"%s\"", identity_file);
|
|
else {
|
|
if (identity_passphrase)
|
|
passphrase = xstrdup(identity_passphrase);
|
|
else if (identity_new_passphrase)
|
|
passphrase = xstrdup(identity_new_passphrase);
|
|
else
|
|
passphrase = read_passphrase("Enter passphrase: ",
|
|
RP_ALLOW_STDIN);
|
|
/* Try to load using the passphrase. */
|
|
if ((r = sshkey_load_private(identity_file, passphrase,
|
|
&private, &comment)) != 0) {
|
|
freezero(passphrase, strlen(passphrase));
|
|
fatal_r(r, "Cannot load private key \"%s\"",
|
|
identity_file);
|
|
}
|
|
}
|
|
|
|
if (private->type != KEY_ED25519 && private->type != KEY_XMSS &&
|
|
private_key_format != SSHKEY_PRIVATE_OPENSSH) {
|
|
error("Comments are only supported for keys stored in "
|
|
"the new format (-o).");
|
|
explicit_bzero(passphrase, strlen(passphrase));
|
|
sshkey_free(private);
|
|
exit(1);
|
|
}
|
|
if (comment)
|
|
printf("Old comment: %s\n", comment);
|
|
else
|
|
printf("No existing comment\n");
|
|
|
|
if (identity_comment) {
|
|
strlcpy(new_comment, identity_comment, sizeof(new_comment));
|
|
} else {
|
|
printf("New comment: ");
|
|
fflush(stdout);
|
|
if (!fgets(new_comment, sizeof(new_comment), stdin)) {
|
|
explicit_bzero(passphrase, strlen(passphrase));
|
|
sshkey_free(private);
|
|
exit(1);
|
|
}
|
|
new_comment[strcspn(new_comment, "\n")] = '\0';
|
|
}
|
|
if (comment != NULL && strcmp(comment, new_comment) == 0) {
|
|
printf("No change to comment\n");
|
|
free(passphrase);
|
|
sshkey_free(private);
|
|
free(comment);
|
|
exit(0);
|
|
}
|
|
|
|
/* Save the file using the new passphrase. */
|
|
if ((r = sshkey_save_private(private, identity_file, passphrase,
|
|
new_comment, private_key_format, openssh_format_cipher,
|
|
rounds)) != 0) {
|
|
error_r(r, "Saving key \"%s\" failed", identity_file);
|
|
freezero(passphrase, strlen(passphrase));
|
|
sshkey_free(private);
|
|
free(comment);
|
|
exit(1);
|
|
}
|
|
freezero(passphrase, strlen(passphrase));
|
|
if ((r = sshkey_from_private(private, &public)) != 0)
|
|
fatal_fr(r, "sshkey_from_private");
|
|
sshkey_free(private);
|
|
|
|
strlcat(identity_file, ".pub", sizeof(identity_file));
|
|
if ((r = sshkey_save_public(public, identity_file, new_comment)) != 0)
|
|
fatal_r(r, "Unable to save public key to %s", identity_file);
|
|
sshkey_free(public);
|
|
free(comment);
|
|
|
|
if (strlen(new_comment) > 0)
|
|
printf("Comment '%s' applied\n", new_comment);
|
|
else
|
|
printf("Comment removed\n");
|
|
|
|
exit(0);
|
|
}
|
|
|
|
static void
|
|
cert_ext_add(const char *key, const char *value, int iscrit)
|
|
{
|
|
cert_ext = xreallocarray(cert_ext, ncert_ext + 1, sizeof(*cert_ext));
|
|
cert_ext[ncert_ext].key = xstrdup(key);
|
|
cert_ext[ncert_ext].val = value == NULL ? NULL : xstrdup(value);
|
|
cert_ext[ncert_ext].crit = iscrit;
|
|
ncert_ext++;
|
|
}
|
|
|
|
/* qsort(3) comparison function for certificate extensions */
|
|
static int
|
|
cert_ext_cmp(const void *_a, const void *_b)
|
|
{
|
|
const struct cert_ext *a = (const struct cert_ext *)_a;
|
|
const struct cert_ext *b = (const struct cert_ext *)_b;
|
|
int r;
|
|
|
|
if (a->crit != b->crit)
|
|
return (a->crit < b->crit) ? -1 : 1;
|
|
if ((r = strcmp(a->key, b->key)) != 0)
|
|
return r;
|
|
if ((a->val == NULL) != (b->val == NULL))
|
|
return (a->val == NULL) ? -1 : 1;
|
|
if (a->val != NULL && (r = strcmp(a->val, b->val)) != 0)
|
|
return r;
|
|
return 0;
|
|
}
|
|
|
|
#define OPTIONS_CRITICAL 1
|
|
#define OPTIONS_EXTENSIONS 2
|
|
static void
|
|
prepare_options_buf(struct sshbuf *c, int which)
|
|
{
|
|
struct sshbuf *b;
|
|
size_t i;
|
|
int r;
|
|
const struct cert_ext *ext;
|
|
|
|
if ((b = sshbuf_new()) == NULL)
|
|
fatal_f("sshbuf_new failed");
|
|
sshbuf_reset(c);
|
|
for (i = 0; i < ncert_ext; i++) {
|
|
ext = &cert_ext[i];
|
|
if ((ext->crit && (which & OPTIONS_EXTENSIONS)) ||
|
|
(!ext->crit && (which & OPTIONS_CRITICAL)))
|
|
continue;
|
|
if (ext->val == NULL) {
|
|
/* flag option */
|
|
debug3_f("%s", ext->key);
|
|
if ((r = sshbuf_put_cstring(c, ext->key)) != 0 ||
|
|
(r = sshbuf_put_string(c, NULL, 0)) != 0)
|
|
fatal_fr(r, "prepare flag");
|
|
} else {
|
|
/* key/value option */
|
|
debug3_f("%s=%s", ext->key, ext->val);
|
|
sshbuf_reset(b);
|
|
if ((r = sshbuf_put_cstring(c, ext->key)) != 0 ||
|
|
(r = sshbuf_put_cstring(b, ext->val)) != 0 ||
|
|
(r = sshbuf_put_stringb(c, b)) != 0)
|
|
fatal_fr(r, "prepare k/v");
|
|
}
|
|
}
|
|
sshbuf_free(b);
|
|
}
|
|
|
|
static void
|
|
finalise_cert_exts(void)
|
|
{
|
|
/* critical options */
|
|
if (certflags_command != NULL)
|
|
cert_ext_add("force-command", certflags_command, 1);
|
|
if (certflags_src_addr != NULL)
|
|
cert_ext_add("source-address", certflags_src_addr, 1);
|
|
if ((certflags_flags & CERTOPT_REQUIRE_VERIFY) != 0)
|
|
cert_ext_add("verify-required", NULL, 1);
|
|
/* extensions */
|
|
if ((certflags_flags & CERTOPT_X_FWD) != 0)
|
|
cert_ext_add("permit-X11-forwarding", NULL, 0);
|
|
if ((certflags_flags & CERTOPT_AGENT_FWD) != 0)
|
|
cert_ext_add("permit-agent-forwarding", NULL, 0);
|
|
if ((certflags_flags & CERTOPT_PORT_FWD) != 0)
|
|
cert_ext_add("permit-port-forwarding", NULL, 0);
|
|
if ((certflags_flags & CERTOPT_PTY) != 0)
|
|
cert_ext_add("permit-pty", NULL, 0);
|
|
if ((certflags_flags & CERTOPT_USER_RC) != 0)
|
|
cert_ext_add("permit-user-rc", NULL, 0);
|
|
if ((certflags_flags & CERTOPT_NO_REQUIRE_USER_PRESENCE) != 0)
|
|
cert_ext_add("no-touch-required", NULL, 0);
|
|
/* order lexically by key */
|
|
if (ncert_ext > 0)
|
|
qsort(cert_ext, ncert_ext, sizeof(*cert_ext), cert_ext_cmp);
|
|
}
|
|
|
|
static struct sshkey *
|
|
load_pkcs11_key(char *path)
|
|
{
|
|
#ifdef ENABLE_PKCS11
|
|
struct sshkey **keys = NULL, *public, *private = NULL;
|
|
int r, i, nkeys;
|
|
|
|
if ((r = sshkey_load_public(path, &public, NULL)) != 0)
|
|
fatal_r(r, "Couldn't load CA public key \"%s\"", path);
|
|
|
|
nkeys = pkcs11_add_provider(pkcs11provider, identity_passphrase,
|
|
&keys, NULL);
|
|
debug3_f("%d keys", nkeys);
|
|
if (nkeys <= 0)
|
|
fatal("cannot read public key from pkcs11");
|
|
for (i = 0; i < nkeys; i++) {
|
|
if (sshkey_equal_public(public, keys[i])) {
|
|
private = keys[i];
|
|
continue;
|
|
}
|
|
sshkey_free(keys[i]);
|
|
}
|
|
free(keys);
|
|
sshkey_free(public);
|
|
return private;
|
|
#else
|
|
fatal("no pkcs11 support");
|
|
#endif /* ENABLE_PKCS11 */
|
|
}
|
|
|
|
/* Signer for sshkey_certify_custom that uses the agent */
|
|
static int
|
|
agent_signer(struct sshkey *key, u_char **sigp, size_t *lenp,
|
|
const u_char *data, size_t datalen,
|
|
const char *alg, const char *provider, const char *pin,
|
|
u_int compat, void *ctx)
|
|
{
|
|
int *agent_fdp = (int *)ctx;
|
|
|
|
return ssh_agent_sign(*agent_fdp, key, sigp, lenp,
|
|
data, datalen, alg, compat);
|
|
}
|
|
|
|
static void
|
|
do_ca_sign(struct passwd *pw, const char *ca_key_path, int prefer_agent,
|
|
unsigned long long cert_serial, int cert_serial_autoinc,
|
|
int argc, char **argv)
|
|
{
|
|
int r, i, found, agent_fd = -1;
|
|
u_int n;
|
|
struct sshkey *ca, *public;
|
|
char valid[64], *otmp, *tmp, *cp, *out, *comment;
|
|
char *ca_fp = NULL, **plist = NULL, *pin = NULL;
|
|
struct ssh_identitylist *agent_ids;
|
|
size_t j;
|
|
struct notifier_ctx *notifier = NULL;
|
|
|
|
#ifdef ENABLE_PKCS11
|
|
pkcs11_init(1);
|
|
#endif
|
|
tmp = tilde_expand_filename(ca_key_path, pw->pw_uid);
|
|
if (pkcs11provider != NULL) {
|
|
/* If a PKCS#11 token was specified then try to use it */
|
|
if ((ca = load_pkcs11_key(tmp)) == NULL)
|
|
fatal("No PKCS#11 key matching %s found", ca_key_path);
|
|
} else if (prefer_agent) {
|
|
/*
|
|
* Agent signature requested. Try to use agent after making
|
|
* sure the public key specified is actually present in the
|
|
* agent.
|
|
*/
|
|
if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0)
|
|
fatal_r(r, "Cannot load CA public key %s", tmp);
|
|
if ((r = ssh_get_authentication_socket(&agent_fd)) != 0)
|
|
fatal_r(r, "Cannot use public key for CA signature");
|
|
if ((r = ssh_fetch_identitylist(agent_fd, &agent_ids)) != 0)
|
|
fatal_r(r, "Retrieve agent key list");
|
|
found = 0;
|
|
for (j = 0; j < agent_ids->nkeys; j++) {
|
|
if (sshkey_equal(ca, agent_ids->keys[j])) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (!found)
|
|
fatal("CA key %s not found in agent", tmp);
|
|
ssh_free_identitylist(agent_ids);
|
|
ca->flags |= SSHKEY_FLAG_EXT;
|
|
} else {
|
|
/* CA key is assumed to be a private key on the filesystem */
|
|
ca = load_identity(tmp, NULL);
|
|
if (sshkey_is_sk(ca) &&
|
|
(ca->sk_flags & SSH_SK_USER_VERIFICATION_REQD)) {
|
|
if ((pin = read_passphrase("Enter PIN for CA key: ",
|
|
RP_ALLOW_STDIN)) == NULL)
|
|
fatal_f("couldn't read PIN");
|
|
}
|
|
}
|
|
free(tmp);
|
|
|
|
if (key_type_name != NULL) {
|
|
if (sshkey_type_from_name(key_type_name) != ca->type) {
|
|
fatal("CA key type %s doesn't match specified %s",
|
|
sshkey_ssh_name(ca), key_type_name);
|
|
}
|
|
} else if (ca->type == KEY_RSA) {
|
|
/* Default to a good signature algorithm */
|
|
key_type_name = "rsa-sha2-512";
|
|
}
|
|
ca_fp = sshkey_fingerprint(ca, fingerprint_hash, SSH_FP_DEFAULT);
|
|
|
|
finalise_cert_exts();
|
|
for (i = 0; i < argc; i++) {
|
|
/* Split list of principals */
|
|
n = 0;
|
|
if (cert_principals != NULL) {
|
|
otmp = tmp = xstrdup(cert_principals);
|
|
plist = NULL;
|
|
for (; (cp = strsep(&tmp, ",")) != NULL; n++) {
|
|
plist = xreallocarray(plist, n + 1, sizeof(*plist));
|
|
if (*(plist[n] = xstrdup(cp)) == '\0')
|
|
fatal("Empty principal name");
|
|
}
|
|
free(otmp);
|
|
}
|
|
if (n > SSHKEY_CERT_MAX_PRINCIPALS)
|
|
fatal("Too many certificate principals specified");
|
|
|
|
tmp = tilde_expand_filename(argv[i], pw->pw_uid);
|
|
if ((r = sshkey_load_public(tmp, &public, &comment)) != 0)
|
|
fatal_r(r, "load pubkey \"%s\"", tmp);
|
|
if (sshkey_is_cert(public))
|
|
fatal_f("key \"%s\" type %s cannot be certified",
|
|
tmp, sshkey_type(public));
|
|
|
|
/* Prepare certificate to sign */
|
|
if ((r = sshkey_to_certified(public)) != 0)
|
|
fatal_r(r, "Could not upgrade key %s to certificate", tmp);
|
|
public->cert->type = cert_key_type;
|
|
public->cert->serial = (u_int64_t)cert_serial;
|
|
public->cert->key_id = xstrdup(cert_key_id);
|
|
public->cert->nprincipals = n;
|
|
public->cert->principals = plist;
|
|
public->cert->valid_after = cert_valid_from;
|
|
public->cert->valid_before = cert_valid_to;
|
|
prepare_options_buf(public->cert->critical, OPTIONS_CRITICAL);
|
|
prepare_options_buf(public->cert->extensions,
|
|
OPTIONS_EXTENSIONS);
|
|
if ((r = sshkey_from_private(ca,
|
|
&public->cert->signature_key)) != 0)
|
|
fatal_r(r, "sshkey_from_private (ca key)");
|
|
|
|
if (agent_fd != -1 && (ca->flags & SSHKEY_FLAG_EXT) != 0) {
|
|
if ((r = sshkey_certify_custom(public, ca,
|
|
key_type_name, sk_provider, NULL, agent_signer,
|
|
&agent_fd)) != 0)
|
|
fatal_r(r, "Couldn't certify %s via agent", tmp);
|
|
} else {
|
|
if (sshkey_is_sk(ca) &&
|
|
(ca->sk_flags & SSH_SK_USER_PRESENCE_REQD)) {
|
|
notifier = notify_start(0,
|
|
"Confirm user presence for key %s %s",
|
|
sshkey_type(ca), ca_fp);
|
|
}
|
|
r = sshkey_certify(public, ca, key_type_name,
|
|
sk_provider, pin);
|
|
notify_complete(notifier, "User presence confirmed");
|
|
if (r != 0)
|
|
fatal_r(r, "Couldn't certify key %s", tmp);
|
|
}
|
|
|
|
if ((cp = strrchr(tmp, '.')) != NULL && strcmp(cp, ".pub") == 0)
|
|
*cp = '\0';
|
|
xasprintf(&out, "%s-cert.pub", tmp);
|
|
free(tmp);
|
|
|
|
if ((r = sshkey_save_public(public, out, comment)) != 0) {
|
|
fatal_r(r, "Unable to save public key to %s",
|
|
identity_file);
|
|
}
|
|
|
|
if (!quiet) {
|
|
sshkey_format_cert_validity(public->cert,
|
|
valid, sizeof(valid));
|
|
logit("Signed %s key %s: id \"%s\" serial %llu%s%s "
|
|
"valid %s", sshkey_cert_type(public),
|
|
out, public->cert->key_id,
|
|
(unsigned long long)public->cert->serial,
|
|
cert_principals != NULL ? " for " : "",
|
|
cert_principals != NULL ? cert_principals : "",
|
|
valid);
|
|
}
|
|
|
|
sshkey_free(public);
|
|
free(out);
|
|
if (cert_serial_autoinc)
|
|
cert_serial++;
|
|
}
|
|
if (pin != NULL)
|
|
freezero(pin, strlen(pin));
|
|
free(ca_fp);
|
|
#ifdef ENABLE_PKCS11
|
|
pkcs11_terminate();
|
|
#endif
|
|
exit(0);
|
|
}
|
|
|
|
static u_int64_t
|
|
parse_relative_time(const char *s, time_t now)
|
|
{
|
|
int64_t mul, secs;
|
|
|
|
mul = *s == '-' ? -1 : 1;
|
|
|
|
if ((secs = convtime(s + 1)) == -1)
|
|
fatal("Invalid relative certificate time %s", s);
|
|
if (mul == -1 && secs > now)
|
|
fatal("Certificate time %s cannot be represented", s);
|
|
return now + (u_int64_t)(secs * mul);
|
|
}
|
|
|
|
static void
|
|
parse_hex_u64(const char *s, uint64_t *up)
|
|
{
|
|
char *ep;
|
|
unsigned long long ull;
|
|
|
|
errno = 0;
|
|
ull = strtoull(s, &ep, 16);
|
|
if (*s == '\0' || *ep != '\0')
|
|
fatal("Invalid certificate time: not a number");
|
|
if (errno == ERANGE && ull == ULONG_MAX)
|
|
fatal_fr(SSH_ERR_SYSTEM_ERROR, "Invalid certificate time");
|
|
*up = (uint64_t)ull;
|
|
}
|
|
|
|
static void
|
|
parse_cert_times(char *timespec)
|
|
{
|
|
char *from, *to;
|
|
time_t now = time(NULL);
|
|
int64_t secs;
|
|
|
|
/* +timespec relative to now */
|
|
if (*timespec == '+' && strchr(timespec, ':') == NULL) {
|
|
if ((secs = convtime(timespec + 1)) == -1)
|
|
fatal("Invalid relative certificate life %s", timespec);
|
|
cert_valid_to = now + secs;
|
|
/*
|
|
* Backdate certificate one minute to avoid problems on hosts
|
|
* with poorly-synchronised clocks.
|
|
*/
|
|
cert_valid_from = ((now - 59)/ 60) * 60;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* from:to, where
|
|
* from := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS | 0x... | "always"
|
|
* to := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS | 0x... | "forever"
|
|
*/
|
|
from = xstrdup(timespec);
|
|
to = strchr(from, ':');
|
|
if (to == NULL || from == to || *(to + 1) == '\0')
|
|
fatal("Invalid certificate life specification %s", timespec);
|
|
*to++ = '\0';
|
|
|
|
if (*from == '-' || *from == '+')
|
|
cert_valid_from = parse_relative_time(from, now);
|
|
else if (strcmp(from, "always") == 0)
|
|
cert_valid_from = 0;
|
|
else if (strncmp(from, "0x", 2) == 0)
|
|
parse_hex_u64(from, &cert_valid_from);
|
|
else if (parse_absolute_time(from, &cert_valid_from) != 0)
|
|
fatal("Invalid from time \"%s\"", from);
|
|
|
|
if (*to == '-' || *to == '+')
|
|
cert_valid_to = parse_relative_time(to, now);
|
|
else if (strcmp(to, "forever") == 0)
|
|
cert_valid_to = ~(u_int64_t)0;
|
|
else if (strncmp(to, "0x", 2) == 0)
|
|
parse_hex_u64(to, &cert_valid_to);
|
|
else if (parse_absolute_time(to, &cert_valid_to) != 0)
|
|
fatal("Invalid to time \"%s\"", to);
|
|
|
|
if (cert_valid_to <= cert_valid_from)
|
|
fatal("Empty certificate validity interval");
|
|
free(from);
|
|
}
|
|
|
|
static void
|
|
add_cert_option(char *opt)
|
|
{
|
|
char *val, *cp;
|
|
int iscrit = 0;
|
|
|
|
if (strcasecmp(opt, "clear") == 0)
|
|
certflags_flags = 0;
|
|
else if (strcasecmp(opt, "no-x11-forwarding") == 0)
|
|
certflags_flags &= ~CERTOPT_X_FWD;
|
|
else if (strcasecmp(opt, "permit-x11-forwarding") == 0)
|
|
certflags_flags |= CERTOPT_X_FWD;
|
|
else if (strcasecmp(opt, "no-agent-forwarding") == 0)
|
|
certflags_flags &= ~CERTOPT_AGENT_FWD;
|
|
else if (strcasecmp(opt, "permit-agent-forwarding") == 0)
|
|
certflags_flags |= CERTOPT_AGENT_FWD;
|
|
else if (strcasecmp(opt, "no-port-forwarding") == 0)
|
|
certflags_flags &= ~CERTOPT_PORT_FWD;
|
|
else if (strcasecmp(opt, "permit-port-forwarding") == 0)
|
|
certflags_flags |= CERTOPT_PORT_FWD;
|
|
else if (strcasecmp(opt, "no-pty") == 0)
|
|
certflags_flags &= ~CERTOPT_PTY;
|
|
else if (strcasecmp(opt, "permit-pty") == 0)
|
|
certflags_flags |= CERTOPT_PTY;
|
|
else if (strcasecmp(opt, "no-user-rc") == 0)
|
|
certflags_flags &= ~CERTOPT_USER_RC;
|
|
else if (strcasecmp(opt, "permit-user-rc") == 0)
|
|
certflags_flags |= CERTOPT_USER_RC;
|
|
else if (strcasecmp(opt, "touch-required") == 0)
|
|
certflags_flags &= ~CERTOPT_NO_REQUIRE_USER_PRESENCE;
|
|
else if (strcasecmp(opt, "no-touch-required") == 0)
|
|
certflags_flags |= CERTOPT_NO_REQUIRE_USER_PRESENCE;
|
|
else if (strcasecmp(opt, "no-verify-required") == 0)
|
|
certflags_flags &= ~CERTOPT_REQUIRE_VERIFY;
|
|
else if (strcasecmp(opt, "verify-required") == 0)
|
|
certflags_flags |= CERTOPT_REQUIRE_VERIFY;
|
|
else if (strncasecmp(opt, "force-command=", 14) == 0) {
|
|
val = opt + 14;
|
|
if (*val == '\0')
|
|
fatal("Empty force-command option");
|
|
if (certflags_command != NULL)
|
|
fatal("force-command already specified");
|
|
certflags_command = xstrdup(val);
|
|
} else if (strncasecmp(opt, "source-address=", 15) == 0) {
|
|
val = opt + 15;
|
|
if (*val == '\0')
|
|
fatal("Empty source-address option");
|
|
if (certflags_src_addr != NULL)
|
|
fatal("source-address already specified");
|
|
if (addr_match_cidr_list(NULL, val) != 0)
|
|
fatal("Invalid source-address list");
|
|
certflags_src_addr = xstrdup(val);
|
|
} else if (strncasecmp(opt, "extension:", 10) == 0 ||
|
|
(iscrit = (strncasecmp(opt, "critical:", 9) == 0))) {
|
|
val = xstrdup(strchr(opt, ':') + 1);
|
|
if ((cp = strchr(val, '=')) != NULL)
|
|
*cp++ = '\0';
|
|
cert_ext_add(val, cp, iscrit);
|
|
free(val);
|
|
} else
|
|
fatal("Unsupported certificate option \"%s\"", opt);
|
|
}
|
|
|
|
static void
|
|
show_options(struct sshbuf *optbuf, int in_critical)
|
|
{
|
|
char *name, *arg, *hex;
|
|
struct sshbuf *options, *option = NULL;
|
|
int r;
|
|
|
|
if ((options = sshbuf_fromb(optbuf)) == NULL)
|
|
fatal_f("sshbuf_fromb failed");
|
|
while (sshbuf_len(options) != 0) {
|
|
sshbuf_free(option);
|
|
option = NULL;
|
|
if ((r = sshbuf_get_cstring(options, &name, NULL)) != 0 ||
|
|
(r = sshbuf_froms(options, &option)) != 0)
|
|
fatal_fr(r, "parse option");
|
|
printf(" %s", name);
|
|
if (!in_critical &&
|
|
(strcmp(name, "permit-X11-forwarding") == 0 ||
|
|
strcmp(name, "permit-agent-forwarding") == 0 ||
|
|
strcmp(name, "permit-port-forwarding") == 0 ||
|
|
strcmp(name, "permit-pty") == 0 ||
|
|
strcmp(name, "permit-user-rc") == 0 ||
|
|
strcmp(name, "no-touch-required") == 0)) {
|
|
printf("\n");
|
|
} else if (in_critical &&
|
|
(strcmp(name, "force-command") == 0 ||
|
|
strcmp(name, "source-address") == 0)) {
|
|
if ((r = sshbuf_get_cstring(option, &arg, NULL)) != 0)
|
|
fatal_fr(r, "parse critical");
|
|
printf(" %s\n", arg);
|
|
free(arg);
|
|
} else if (in_critical &&
|
|
strcmp(name, "verify-required") == 0) {
|
|
printf("\n");
|
|
} else if (sshbuf_len(option) > 0) {
|
|
hex = sshbuf_dtob16(option);
|
|
printf(" UNKNOWN OPTION: %s (len %zu)\n",
|
|
hex, sshbuf_len(option));
|
|
sshbuf_reset(option);
|
|
free(hex);
|
|
} else
|
|
printf(" UNKNOWN FLAG OPTION\n");
|
|
free(name);
|
|
if (sshbuf_len(option) != 0)
|
|
fatal("Option corrupt: extra data at end");
|
|
}
|
|
sshbuf_free(option);
|
|
sshbuf_free(options);
|
|
}
|
|
|
|
static void
|
|
print_cert(struct sshkey *key)
|
|
{
|
|
char valid[64], *key_fp, *ca_fp;
|
|
u_int i;
|
|
|
|
key_fp = sshkey_fingerprint(key, fingerprint_hash, SSH_FP_DEFAULT);
|
|
ca_fp = sshkey_fingerprint(key->cert->signature_key,
|
|
fingerprint_hash, SSH_FP_DEFAULT);
|
|
if (key_fp == NULL || ca_fp == NULL)
|
|
fatal_f("sshkey_fingerprint fail");
|
|
sshkey_format_cert_validity(key->cert, valid, sizeof(valid));
|
|
|
|
printf(" Type: %s %s certificate\n", sshkey_ssh_name(key),
|
|
sshkey_cert_type(key));
|
|
printf(" Public key: %s %s\n", sshkey_type(key), key_fp);
|
|
printf(" Signing CA: %s %s (using %s)\n",
|
|
sshkey_type(key->cert->signature_key), ca_fp,
|
|
key->cert->signature_type);
|
|
printf(" Key ID: \"%s\"\n", key->cert->key_id);
|
|
printf(" Serial: %llu\n", (unsigned long long)key->cert->serial);
|
|
printf(" Valid: %s\n", valid);
|
|
printf(" Principals: ");
|
|
if (key->cert->nprincipals == 0)
|
|
printf("(none)\n");
|
|
else {
|
|
for (i = 0; i < key->cert->nprincipals; i++)
|
|
printf("\n %s",
|
|
key->cert->principals[i]);
|
|
printf("\n");
|
|
}
|
|
printf(" Critical Options: ");
|
|
if (sshbuf_len(key->cert->critical) == 0)
|
|
printf("(none)\n");
|
|
else {
|
|
printf("\n");
|
|
show_options(key->cert->critical, 1);
|
|
}
|
|
printf(" Extensions: ");
|
|
if (sshbuf_len(key->cert->extensions) == 0)
|
|
printf("(none)\n");
|
|
else {
|
|
printf("\n");
|
|
show_options(key->cert->extensions, 0);
|
|
}
|
|
}
|
|
|
|
static void
|
|
do_show_cert(struct passwd *pw)
|
|
{
|
|
struct sshkey *key = NULL;
|
|
struct stat st;
|
|
int r, is_stdin = 0, ok = 0;
|
|
FILE *f;
|
|
char *cp, *line = NULL;
|
|
const char *path;
|
|
size_t linesize = 0;
|
|
u_long lnum = 0;
|
|
|
|
if (!have_identity)
|
|
ask_filename(pw, "Enter file in which the key is");
|
|
if (strcmp(identity_file, "-") != 0 && stat(identity_file, &st) == -1)
|
|
fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
|
|
|
|
path = identity_file;
|
|
if (strcmp(path, "-") == 0) {
|
|
f = stdin;
|
|
path = "(stdin)";
|
|
is_stdin = 1;
|
|
} else if ((f = fopen(identity_file, "r")) == NULL)
|
|
fatal("fopen %s: %s", identity_file, strerror(errno));
|
|
|
|
while (getline(&line, &linesize, f) != -1) {
|
|
lnum++;
|
|
sshkey_free(key);
|
|
key = NULL;
|
|
/* Trim leading space and comments */
|
|
cp = line + strspn(line, " \t");
|
|
if (*cp == '#' || *cp == '\0')
|
|
continue;
|
|
if ((key = sshkey_new(KEY_UNSPEC)) == NULL)
|
|
fatal("sshkey_new");
|
|
if ((r = sshkey_read(key, &cp)) != 0) {
|
|
error_r(r, "%s:%lu: invalid key", path, lnum);
|
|
continue;
|
|
}
|
|
if (!sshkey_is_cert(key)) {
|
|
error("%s:%lu is not a certificate", path, lnum);
|
|
continue;
|
|
}
|
|
ok = 1;
|
|
if (!is_stdin && lnum == 1)
|
|
printf("%s:\n", path);
|
|
else
|
|
printf("%s:%lu:\n", path, lnum);
|
|
print_cert(key);
|
|
}
|
|
free(line);
|
|
sshkey_free(key);
|
|
fclose(f);
|
|
exit(ok ? 0 : 1);
|
|
}
|
|
|
|
static void
|
|
load_krl(const char *path, struct ssh_krl **krlp)
|
|
{
|
|
struct sshbuf *krlbuf;
|
|
int r;
|
|
|
|
if ((r = sshbuf_load_file(path, &krlbuf)) != 0)
|
|
fatal_r(r, "Unable to load KRL %s", path);
|
|
/* XXX check sigs */
|
|
if ((r = ssh_krl_from_blob(krlbuf, krlp)) != 0 ||
|
|
*krlp == NULL)
|
|
fatal_r(r, "Invalid KRL file %s", path);
|
|
sshbuf_free(krlbuf);
|
|
}
|
|
|
|
static void
|
|
hash_to_blob(const char *cp, u_char **blobp, size_t *lenp,
|
|
const char *file, u_long lnum)
|
|
{
|
|
char *tmp;
|
|
size_t tlen;
|
|
struct sshbuf *b;
|
|
int r;
|
|
|
|
if (strncmp(cp, "SHA256:", 7) != 0)
|
|
fatal("%s:%lu: unsupported hash algorithm", file, lnum);
|
|
cp += 7;
|
|
|
|
/*
|
|
* OpenSSH base64 hashes omit trailing '='
|
|
* characters; put them back for decode.
|
|
*/
|
|
if ((tlen = strlen(cp)) >= SIZE_MAX - 5)
|
|
fatal_f("hash too long: %zu bytes", tlen);
|
|
tmp = xmalloc(tlen + 4 + 1);
|
|
strlcpy(tmp, cp, tlen + 1);
|
|
while ((tlen % 4) != 0) {
|
|
tmp[tlen++] = '=';
|
|
tmp[tlen] = '\0';
|
|
}
|
|
if ((b = sshbuf_new()) == NULL)
|
|
fatal_f("sshbuf_new failed");
|
|
if ((r = sshbuf_b64tod(b, tmp)) != 0)
|
|
fatal_r(r, "%s:%lu: decode hash failed", file, lnum);
|
|
free(tmp);
|
|
*lenp = sshbuf_len(b);
|
|
*blobp = xmalloc(*lenp);
|
|
memcpy(*blobp, sshbuf_ptr(b), *lenp);
|
|
sshbuf_free(b);
|
|
}
|
|
|
|
static void
|
|
update_krl_from_file(struct passwd *pw, const char *file, int wild_ca,
|
|
const struct sshkey *ca, struct ssh_krl *krl)
|
|
{
|
|
struct sshkey *key = NULL;
|
|
u_long lnum = 0;
|
|
char *path, *cp, *ep, *line = NULL;
|
|
u_char *blob = NULL;
|
|
size_t blen = 0, linesize = 0;
|
|
unsigned long long serial, serial2;
|
|
int i, was_explicit_key, was_sha1, was_sha256, was_hash, r;
|
|
FILE *krl_spec;
|
|
|
|
path = tilde_expand_filename(file, pw->pw_uid);
|
|
if (strcmp(path, "-") == 0) {
|
|
krl_spec = stdin;
|
|
free(path);
|
|
path = xstrdup("(standard input)");
|
|
} else if ((krl_spec = fopen(path, "r")) == NULL)
|
|
fatal("fopen %s: %s", path, strerror(errno));
|
|
|
|
if (!quiet)
|
|
printf("Revoking from %s\n", path);
|
|
while (getline(&line, &linesize, krl_spec) != -1) {
|
|
if (linesize >= INT_MAX) {
|
|
fatal_f("%s contains unparsable line, len=%zu",
|
|
path, linesize);
|
|
}
|
|
lnum++;
|
|
was_explicit_key = was_sha1 = was_sha256 = was_hash = 0;
|
|
cp = line + strspn(line, " \t");
|
|
/* Trim trailing space, comments and strip \n */
|
|
for (i = 0, r = -1; cp[i] != '\0'; i++) {
|
|
if (cp[i] == '#' || cp[i] == '\n') {
|
|
cp[i] = '\0';
|
|
break;
|
|
}
|
|
if (cp[i] == ' ' || cp[i] == '\t') {
|
|
/* Remember the start of a span of whitespace */
|
|
if (r == -1)
|
|
r = i;
|
|
} else
|
|
r = -1;
|
|
}
|
|
if (r != -1)
|
|
cp[r] = '\0';
|
|
if (*cp == '\0')
|
|
continue;
|
|
if (strncasecmp(cp, "serial:", 7) == 0) {
|
|
if (ca == NULL && !wild_ca) {
|
|
fatal("revoking certificates by serial number "
|
|
"requires specification of a CA key");
|
|
}
|
|
cp += 7;
|
|
cp = cp + strspn(cp, " \t");
|
|
errno = 0;
|
|
serial = strtoull(cp, &ep, 0);
|
|
if (*cp == '\0' || (*ep != '\0' && *ep != '-'))
|
|
fatal("%s:%lu: invalid serial \"%s\"",
|
|
path, lnum, cp);
|
|
if (errno == ERANGE && serial == ULLONG_MAX)
|
|
fatal("%s:%lu: serial out of range",
|
|
path, lnum);
|
|
serial2 = serial;
|
|
if (*ep == '-') {
|
|
cp = ep + 1;
|
|
errno = 0;
|
|
serial2 = strtoull(cp, &ep, 0);
|
|
if (*cp == '\0' || *ep != '\0')
|
|
fatal("%s:%lu: invalid serial \"%s\"",
|
|
path, lnum, cp);
|
|
if (errno == ERANGE && serial2 == ULLONG_MAX)
|
|
fatal("%s:%lu: serial out of range",
|
|
path, lnum);
|
|
if (serial2 <= serial)
|
|
fatal("%s:%lu: invalid serial range "
|
|
"%llu:%llu", path, lnum,
|
|
(unsigned long long)serial,
|
|
(unsigned long long)serial2);
|
|
}
|
|
if (ssh_krl_revoke_cert_by_serial_range(krl,
|
|
ca, serial, serial2) != 0) {
|
|
fatal_f("revoke serial failed");
|
|
}
|
|
} else if (strncasecmp(cp, "id:", 3) == 0) {
|
|
if (ca == NULL && !wild_ca) {
|
|
fatal("revoking certificates by key ID "
|
|
"requires specification of a CA key");
|
|
}
|
|
cp += 3;
|
|
cp = cp + strspn(cp, " \t");
|
|
if (ssh_krl_revoke_cert_by_key_id(krl, ca, cp) != 0)
|
|
fatal_f("revoke key ID failed");
|
|
} else if (strncasecmp(cp, "hash:", 5) == 0) {
|
|
cp += 5;
|
|
cp = cp + strspn(cp, " \t");
|
|
hash_to_blob(cp, &blob, &blen, file, lnum);
|
|
r = ssh_krl_revoke_key_sha256(krl, blob, blen);
|
|
if (r != 0)
|
|
fatal_fr(r, "revoke key failed");
|
|
} else {
|
|
if (strncasecmp(cp, "key:", 4) == 0) {
|
|
cp += 4;
|
|
cp = cp + strspn(cp, " \t");
|
|
was_explicit_key = 1;
|
|
} else if (strncasecmp(cp, "sha1:", 5) == 0) {
|
|
cp += 5;
|
|
cp = cp + strspn(cp, " \t");
|
|
was_sha1 = 1;
|
|
} else if (strncasecmp(cp, "sha256:", 7) == 0) {
|
|
cp += 7;
|
|
cp = cp + strspn(cp, " \t");
|
|
was_sha256 = 1;
|
|
/*
|
|
* Just try to process the line as a key.
|
|
* Parsing will fail if it isn't.
|
|
*/
|
|
}
|
|
if ((key = sshkey_new(KEY_UNSPEC)) == NULL)
|
|
fatal("sshkey_new");
|
|
if ((r = sshkey_read(key, &cp)) != 0)
|
|
fatal_r(r, "%s:%lu: invalid key", path, lnum);
|
|
if (was_explicit_key)
|
|
r = ssh_krl_revoke_key_explicit(krl, key);
|
|
else if (was_sha1) {
|
|
if (sshkey_fingerprint_raw(key,
|
|
SSH_DIGEST_SHA1, &blob, &blen) != 0) {
|
|
fatal("%s:%lu: fingerprint failed",
|
|
file, lnum);
|
|
}
|
|
r = ssh_krl_revoke_key_sha1(krl, blob, blen);
|
|
} else if (was_sha256) {
|
|
if (sshkey_fingerprint_raw(key,
|
|
SSH_DIGEST_SHA256, &blob, &blen) != 0) {
|
|
fatal("%s:%lu: fingerprint failed",
|
|
file, lnum);
|
|
}
|
|
r = ssh_krl_revoke_key_sha256(krl, blob, blen);
|
|
} else
|
|
r = ssh_krl_revoke_key(krl, key);
|
|
if (r != 0)
|
|
fatal_fr(r, "revoke key failed");
|
|
freezero(blob, blen);
|
|
blob = NULL;
|
|
blen = 0;
|
|
sshkey_free(key);
|
|
}
|
|
}
|
|
if (strcmp(path, "-") != 0)
|
|
fclose(krl_spec);
|
|
free(line);
|
|
free(path);
|
|
}
|
|
|
|
static void
|
|
do_gen_krl(struct passwd *pw, int updating, const char *ca_key_path,
|
|
unsigned long long krl_version, const char *krl_comment,
|
|
int argc, char **argv)
|
|
{
|
|
struct ssh_krl *krl;
|
|
struct stat sb;
|
|
struct sshkey *ca = NULL;
|
|
int i, r, wild_ca = 0;
|
|
char *tmp;
|
|
struct sshbuf *kbuf;
|
|
|
|
if (*identity_file == '\0')
|
|
fatal("KRL generation requires an output file");
|
|
if (stat(identity_file, &sb) == -1) {
|
|
if (errno != ENOENT)
|
|
fatal("Cannot access KRL \"%s\": %s",
|
|
identity_file, strerror(errno));
|
|
if (updating)
|
|
fatal("KRL \"%s\" does not exist", identity_file);
|
|
}
|
|
if (ca_key_path != NULL) {
|
|
if (strcasecmp(ca_key_path, "none") == 0)
|
|
wild_ca = 1;
|
|
else {
|
|
tmp = tilde_expand_filename(ca_key_path, pw->pw_uid);
|
|
if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0)
|
|
fatal_r(r, "Cannot load CA public key %s", tmp);
|
|
free(tmp);
|
|
}
|
|
}
|
|
|
|
if (updating)
|
|
load_krl(identity_file, &krl);
|
|
else if ((krl = ssh_krl_init()) == NULL)
|
|
fatal("couldn't create KRL");
|
|
|
|
if (krl_version != 0)
|
|
ssh_krl_set_version(krl, krl_version);
|
|
if (krl_comment != NULL)
|
|
ssh_krl_set_comment(krl, krl_comment);
|
|
|
|
for (i = 0; i < argc; i++)
|
|
update_krl_from_file(pw, argv[i], wild_ca, ca, krl);
|
|
|
|
if ((kbuf = sshbuf_new()) == NULL)
|
|
fatal("sshbuf_new failed");
|
|
if (ssh_krl_to_blob(krl, kbuf) != 0)
|
|
fatal("Couldn't generate KRL");
|
|
if ((r = sshbuf_write_file(identity_file, kbuf)) != 0)
|
|
fatal("write %s: %s", identity_file, strerror(errno));
|
|
sshbuf_free(kbuf);
|
|
ssh_krl_free(krl);
|
|
sshkey_free(ca);
|
|
}
|
|
|
|
static void
|
|
do_check_krl(struct passwd *pw, int print_krl, int argc, char **argv)
|
|
{
|
|
int i, r, ret = 0;
|
|
char *comment;
|
|
struct ssh_krl *krl;
|
|
struct sshkey *k;
|
|
|
|
if (*identity_file == '\0')
|
|
fatal("KRL checking requires an input file");
|
|
load_krl(identity_file, &krl);
|
|
if (print_krl)
|
|
krl_dump(krl, stdout);
|
|
for (i = 0; i < argc; i++) {
|
|
if ((r = sshkey_load_public(argv[i], &k, &comment)) != 0)
|
|
fatal_r(r, "Cannot load public key %s", argv[i]);
|
|
r = ssh_krl_check_key(krl, k);
|
|
printf("%s%s%s%s: %s\n", argv[i],
|
|
*comment ? " (" : "", comment, *comment ? ")" : "",
|
|
r == 0 ? "ok" : "REVOKED");
|
|
if (r != 0)
|
|
ret = 1;
|
|
sshkey_free(k);
|
|
free(comment);
|
|
}
|
|
ssh_krl_free(krl);
|
|
exit(ret);
|
|
}
|
|
|
|
static struct sshkey *
|
|
load_sign_key(const char *keypath, const struct sshkey *pubkey)
|
|
{
|
|
size_t i, slen, plen = strlen(keypath);
|
|
char *privpath = xstrdup(keypath);
|
|
static const char * const suffixes[] = { "-cert.pub", ".pub", NULL };
|
|
struct sshkey *ret = NULL, *privkey = NULL;
|
|
int r, waspub = 0;
|
|
struct stat st;
|
|
|
|
/*
|
|
* If passed a public key filename, then try to locate the corresponding
|
|
* private key. This lets us specify certificates on the command-line
|
|
* and have ssh-keygen find the appropriate private key.
|
|
*/
|
|
for (i = 0; suffixes[i]; i++) {
|
|
slen = strlen(suffixes[i]);
|
|
if (plen <= slen ||
|
|
strcmp(privpath + plen - slen, suffixes[i]) != 0)
|
|
continue;
|
|
privpath[plen - slen] = '\0';
|
|
debug_f("%s looks like a public key, using private key "
|
|
"path %s instead", keypath, privpath);
|
|
waspub = 1;
|
|
}
|
|
if (waspub && stat(privpath, &st) != 0 && errno == ENOENT)
|
|
fatal("No private key found for public key \"%s\"", keypath);
|
|
if ((r = sshkey_load_private(privpath, "", &privkey, NULL)) != 0 &&
|
|
(r != SSH_ERR_KEY_WRONG_PASSPHRASE)) {
|
|
debug_fr(r, "load private key \"%s\"", privpath);
|
|
fatal("No private key found for \"%s\"", privpath);
|
|
} else if (privkey == NULL)
|
|
privkey = load_identity(privpath, NULL);
|
|
|
|
if (!sshkey_equal_public(pubkey, privkey)) {
|
|
error("Public key %s doesn't match private %s",
|
|
keypath, privpath);
|
|
goto done;
|
|
}
|
|
if (sshkey_is_cert(pubkey) && !sshkey_is_cert(privkey)) {
|
|
/*
|
|
* Graft the certificate onto the private key to make
|
|
* it capable of signing.
|
|
*/
|
|
if ((r = sshkey_to_certified(privkey)) != 0) {
|
|
error_fr(r, "sshkey_to_certified");
|
|
goto done;
|
|
}
|
|
if ((r = sshkey_cert_copy(pubkey, privkey)) != 0) {
|
|
error_fr(r, "sshkey_cert_copy");
|
|
goto done;
|
|
}
|
|
}
|
|
/* success */
|
|
ret = privkey;
|
|
privkey = NULL;
|
|
done:
|
|
sshkey_free(privkey);
|
|
free(privpath);
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
sign_one(struct sshkey *signkey, const char *filename, int fd,
|
|
const char *sig_namespace, const char *hashalg, sshsig_signer *signer,
|
|
void *signer_ctx)
|
|
{
|
|
struct sshbuf *sigbuf = NULL, *abuf = NULL;
|
|
int r = SSH_ERR_INTERNAL_ERROR, wfd = -1, oerrno;
|
|
char *wfile = NULL, *asig = NULL, *fp = NULL;
|
|
char *pin = NULL, *prompt = NULL;
|
|
|
|
if (!quiet) {
|
|
if (fd == STDIN_FILENO)
|
|
fprintf(stderr, "Signing data on standard input\n");
|
|
else
|
|
fprintf(stderr, "Signing file %s\n", filename);
|
|
}
|
|
if (signer == NULL && sshkey_is_sk(signkey)) {
|
|
if ((signkey->sk_flags & SSH_SK_USER_VERIFICATION_REQD)) {
|
|
xasprintf(&prompt, "Enter PIN for %s key: ",
|
|
sshkey_type(signkey));
|
|
if ((pin = read_passphrase(prompt,
|
|
RP_ALLOW_STDIN)) == NULL)
|
|
fatal_f("couldn't read PIN");
|
|
}
|
|
if ((signkey->sk_flags & SSH_SK_USER_PRESENCE_REQD)) {
|
|
if ((fp = sshkey_fingerprint(signkey, fingerprint_hash,
|
|
SSH_FP_DEFAULT)) == NULL)
|
|
fatal_f("fingerprint failed");
|
|
fprintf(stderr, "Confirm user presence for key %s %s\n",
|
|
sshkey_type(signkey), fp);
|
|
free(fp);
|
|
}
|
|
}
|
|
if ((r = sshsig_sign_fd(signkey, hashalg, sk_provider, pin,
|
|
fd, sig_namespace, &sigbuf, signer, signer_ctx)) != 0) {
|
|
error_r(r, "Signing %s failed", filename);
|
|
goto out;
|
|
}
|
|
if ((r = sshsig_armor(sigbuf, &abuf)) != 0) {
|
|
error_fr(r, "sshsig_armor");
|
|
goto out;
|
|
}
|
|
if ((asig = sshbuf_dup_string(abuf)) == NULL) {
|
|
error_f("buffer error");
|
|
r = SSH_ERR_ALLOC_FAIL;
|
|
goto out;
|
|
}
|
|
|
|
if (fd == STDIN_FILENO) {
|
|
fputs(asig, stdout);
|
|
fflush(stdout);
|
|
} else {
|
|
xasprintf(&wfile, "%s.sig", filename);
|
|
if (confirm_overwrite(wfile)) {
|
|
if ((wfd = open(wfile, O_WRONLY|O_CREAT|O_TRUNC,
|
|
0666)) == -1) {
|
|
oerrno = errno;
|
|
error("Cannot open %s: %s",
|
|
wfile, strerror(errno));
|
|
errno = oerrno;
|
|
r = SSH_ERR_SYSTEM_ERROR;
|
|
goto out;
|
|
}
|
|
if (atomicio(vwrite, wfd, asig,
|
|
strlen(asig)) != strlen(asig)) {
|
|
oerrno = errno;
|
|
error("Cannot write to %s: %s",
|
|
wfile, strerror(errno));
|
|
errno = oerrno;
|
|
r = SSH_ERR_SYSTEM_ERROR;
|
|
goto out;
|
|
}
|
|
if (!quiet) {
|
|
fprintf(stderr, "Write signature to %s\n",
|
|
wfile);
|
|
}
|
|
}
|
|
}
|
|
/* success */
|
|
r = 0;
|
|
out:
|
|
free(wfile);
|
|
free(prompt);
|
|
free(asig);
|
|
if (pin != NULL)
|
|
freezero(pin, strlen(pin));
|
|
sshbuf_free(abuf);
|
|
sshbuf_free(sigbuf);
|
|
if (wfd != -1)
|
|
close(wfd);
|
|
return r;
|
|
}
|
|
|
|
static int
|
|
sig_process_opts(char * const *opts, size_t nopts, char **hashalgp,
|
|
uint64_t *verify_timep, int *print_pubkey)
|
|
{
|
|
size_t i;
|
|
time_t now;
|
|
|
|
if (verify_timep != NULL)
|
|
*verify_timep = 0;
|
|
if (print_pubkey != NULL)
|
|
*print_pubkey = 0;
|
|
if (hashalgp != NULL)
|
|
*hashalgp = NULL;
|
|
for (i = 0; i < nopts; i++) {
|
|
if (hashalgp != NULL &&
|
|
strncasecmp(opts[i], "hashalg=", 8) == 0) {
|
|
*hashalgp = xstrdup(opts[i] + 8);
|
|
} else if (verify_timep &&
|
|
strncasecmp(opts[i], "verify-time=", 12) == 0) {
|
|
if (parse_absolute_time(opts[i] + 12,
|
|
verify_timep) != 0 || *verify_timep == 0) {
|
|
error("Invalid \"verify-time\" option");
|
|
return SSH_ERR_INVALID_ARGUMENT;
|
|
}
|
|
} else if (print_pubkey &&
|
|
strcasecmp(opts[i], "print-pubkey") == 0) {
|
|
*print_pubkey = 1;
|
|
} else {
|
|
error("Invalid option \"%s\"", opts[i]);
|
|
return SSH_ERR_INVALID_ARGUMENT;
|
|
}
|
|
}
|
|
if (verify_timep && *verify_timep == 0) {
|
|
if ((now = time(NULL)) < 0) {
|
|
error("Time is before epoch");
|
|
return SSH_ERR_INVALID_ARGUMENT;
|
|
}
|
|
*verify_timep = (uint64_t)now;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
sig_sign(const char *keypath, const char *sig_namespace, int require_agent,
|
|
int argc, char **argv, char * const *opts, size_t nopts)
|
|
{
|
|
int i, fd = -1, r, ret = -1;
|
|
int agent_fd = -1;
|
|
struct sshkey *pubkey = NULL, *privkey = NULL, *signkey = NULL;
|
|
sshsig_signer *signer = NULL;
|
|
char *hashalg = NULL;
|
|
|
|
/* Check file arguments. */
|
|
for (i = 0; i < argc; i++) {
|
|
if (strcmp(argv[i], "-") != 0)
|
|
continue;
|
|
if (i > 0 || argc > 1)
|
|
fatal("Cannot sign mix of paths and standard input");
|
|
}
|
|
|
|
if (sig_process_opts(opts, nopts, &hashalg, NULL, NULL) != 0)
|
|
goto done; /* error already logged */
|
|
|
|
if ((r = sshkey_load_public(keypath, &pubkey, NULL)) != 0) {
|
|
error_r(r, "Couldn't load public key %s", keypath);
|
|
goto done;
|
|
}
|
|
|
|
if ((r = ssh_get_authentication_socket(&agent_fd)) != 0) {
|
|
if (require_agent)
|
|
fatal("Couldn't get agent socket");
|
|
debug_r(r, "Couldn't get agent socket");
|
|
} else {
|
|
if ((r = ssh_agent_has_key(agent_fd, pubkey)) == 0)
|
|
signer = agent_signer;
|
|
else {
|
|
if (require_agent)
|
|
fatal("Couldn't find key in agent");
|
|
debug_r(r, "Couldn't find key in agent");
|
|
}
|
|
}
|
|
|
|
if (signer == NULL) {
|
|
/* Not using agent - try to load private key */
|
|
if ((privkey = load_sign_key(keypath, pubkey)) == NULL)
|
|
goto done;
|
|
signkey = privkey;
|
|
} else {
|
|
/* Will use key in agent */
|
|
signkey = pubkey;
|
|
}
|
|
|
|
if (argc == 0) {
|
|
if ((r = sign_one(signkey, "(stdin)", STDIN_FILENO,
|
|
sig_namespace, hashalg, signer, &agent_fd)) != 0)
|
|
goto done;
|
|
} else {
|
|
for (i = 0; i < argc; i++) {
|
|
if (strcmp(argv[i], "-") == 0)
|
|
fd = STDIN_FILENO;
|
|
else if ((fd = open(argv[i], O_RDONLY)) == -1) {
|
|
error("Cannot open %s for signing: %s",
|
|
argv[i], strerror(errno));
|
|
goto done;
|
|
}
|
|
if ((r = sign_one(signkey, argv[i], fd, sig_namespace,
|
|
hashalg, signer, &agent_fd)) != 0)
|
|
goto done;
|
|
if (fd != STDIN_FILENO)
|
|
close(fd);
|
|
fd = -1;
|
|
}
|
|
}
|
|
|
|
ret = 0;
|
|
done:
|
|
if (fd != -1 && fd != STDIN_FILENO)
|
|
close(fd);
|
|
sshkey_free(pubkey);
|
|
sshkey_free(privkey);
|
|
free(hashalg);
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
sig_verify(const char *signature, const char *sig_namespace,
|
|
const char *principal, const char *allowed_keys, const char *revoked_keys,
|
|
char * const *opts, size_t nopts)
|
|
{
|
|
int r, ret = -1;
|
|
int print_pubkey = 0;
|
|
struct sshbuf *sigbuf = NULL, *abuf = NULL;
|
|
struct sshkey *sign_key = NULL;
|
|
char *fp = NULL;
|
|
struct sshkey_sig_details *sig_details = NULL;
|
|
uint64_t verify_time = 0;
|
|
|
|
if (sig_process_opts(opts, nopts, NULL, &verify_time,
|
|
&print_pubkey) != 0)
|
|
goto done; /* error already logged */
|
|
|
|
memset(&sig_details, 0, sizeof(sig_details));
|
|
if ((r = sshbuf_load_file(signature, &abuf)) != 0) {
|
|
error_r(r, "Couldn't read signature file");
|
|
goto done;
|
|
}
|
|
|
|
if ((r = sshsig_dearmor(abuf, &sigbuf)) != 0) {
|
|
error_fr(r, "sshsig_armor");
|
|
goto done;
|
|
}
|
|
if ((r = sshsig_verify_fd(sigbuf, STDIN_FILENO, sig_namespace,
|
|
&sign_key, &sig_details)) != 0)
|
|
goto done; /* sshsig_verify() prints error */
|
|
|
|
if ((fp = sshkey_fingerprint(sign_key, fingerprint_hash,
|
|
SSH_FP_DEFAULT)) == NULL)
|
|
fatal_f("sshkey_fingerprint failed");
|
|
debug("Valid (unverified) signature from key %s", fp);
|
|
if (sig_details != NULL) {
|
|
debug2_f("signature details: counter = %u, flags = 0x%02x",
|
|
sig_details->sk_counter, sig_details->sk_flags);
|
|
}
|
|
free(fp);
|
|
fp = NULL;
|
|
|
|
if (revoked_keys != NULL) {
|
|
if ((r = sshkey_check_revoked(sign_key, revoked_keys)) != 0) {
|
|
debug3_fr(r, "sshkey_check_revoked");
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
if (allowed_keys != NULL && (r = sshsig_check_allowed_keys(allowed_keys,
|
|
sign_key, principal, sig_namespace, verify_time)) != 0) {
|
|
debug3_fr(r, "sshsig_check_allowed_keys");
|
|
goto done;
|
|
}
|
|
/* success */
|
|
ret = 0;
|
|
done:
|
|
if (!quiet) {
|
|
if (ret == 0) {
|
|
if ((fp = sshkey_fingerprint(sign_key, fingerprint_hash,
|
|
SSH_FP_DEFAULT)) == NULL)
|
|
fatal_f("sshkey_fingerprint failed");
|
|
if (principal == NULL) {
|
|
printf("Good \"%s\" signature with %s key %s\n",
|
|
sig_namespace, sshkey_type(sign_key), fp);
|
|
|
|
} else {
|
|
printf("Good \"%s\" signature for %s with %s key %s\n",
|
|
sig_namespace, principal,
|
|
sshkey_type(sign_key), fp);
|
|
}
|
|
} else {
|
|
printf("Could not verify signature.\n");
|
|
}
|
|
}
|
|
/* Print the signature key if requested */
|
|
if (ret == 0 && print_pubkey && sign_key != NULL) {
|
|
if ((r = sshkey_write(sign_key, stdout)) == 0)
|
|
fputc('\n', stdout);
|
|
else {
|
|
error_r(r, "Could not print public key.\n");
|
|
ret = -1;
|
|
}
|
|
}
|
|
sshbuf_free(sigbuf);
|
|
sshbuf_free(abuf);
|
|
sshkey_free(sign_key);
|
|
sshkey_sig_details_free(sig_details);
|
|
free(fp);
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
sig_find_principals(const char *signature, const char *allowed_keys,
|
|
char * const *opts, size_t nopts)
|
|
{
|
|
int r, ret = -1;
|
|
struct sshbuf *sigbuf = NULL, *abuf = NULL;
|
|
struct sshkey *sign_key = NULL;
|
|
char *principals = NULL, *cp, *tmp;
|
|
uint64_t verify_time = 0;
|
|
|
|
if (sig_process_opts(opts, nopts, NULL, &verify_time, NULL) != 0)
|
|
goto done; /* error already logged */
|
|
|
|
if ((r = sshbuf_load_file(signature, &abuf)) != 0) {
|
|
error_r(r, "Couldn't read signature file");
|
|
goto done;
|
|
}
|
|
if ((r = sshsig_dearmor(abuf, &sigbuf)) != 0) {
|
|
error_fr(r, "sshsig_armor");
|
|
goto done;
|
|
}
|
|
if ((r = sshsig_get_pubkey(sigbuf, &sign_key)) != 0) {
|
|
error_fr(r, "sshsig_get_pubkey");
|
|
goto done;
|
|
}
|
|
if ((r = sshsig_find_principals(allowed_keys, sign_key,
|
|
verify_time, &principals)) != 0) {
|
|
if (r != SSH_ERR_KEY_NOT_FOUND)
|
|
error_fr(r, "sshsig_find_principal");
|
|
goto done;
|
|
}
|
|
ret = 0;
|
|
done:
|
|
if (ret == 0 ) {
|
|
/* Emit matching principals one per line */
|
|
tmp = principals;
|
|
while ((cp = strsep(&tmp, ",")) != NULL && *cp != '\0')
|
|
puts(cp);
|
|
} else {
|
|
fprintf(stderr, "No principal matched.\n");
|
|
}
|
|
sshbuf_free(sigbuf);
|
|
sshbuf_free(abuf);
|
|
sshkey_free(sign_key);
|
|
free(principals);
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
sig_match_principals(const char *allowed_keys, char *principal,
|
|
char * const *opts, size_t nopts)
|
|
{
|
|
int r;
|
|
char **principals = NULL;
|
|
size_t i, nprincipals = 0;
|
|
|
|
if ((r = sig_process_opts(opts, nopts, NULL, NULL, NULL)) != 0)
|
|
return r; /* error already logged */
|
|
|
|
if ((r = sshsig_match_principals(allowed_keys, principal,
|
|
&principals, &nprincipals)) != 0) {
|
|
debug_f("match: %s", ssh_err(r));
|
|
fprintf(stderr, "No principal matched.\n");
|
|
return r;
|
|
}
|
|
for (i = 0; i < nprincipals; i++) {
|
|
printf("%s\n", principals[i]);
|
|
free(principals[i]);
|
|
}
|
|
free(principals);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
do_moduli_gen(const char *out_file, char **opts, size_t nopts)
|
|
{
|
|
#ifdef WITH_OPENSSL
|
|
/* Moduli generation/screening */
|
|
u_int32_t memory = 0;
|
|
BIGNUM *start = NULL;
|
|
int moduli_bits = 0;
|
|
FILE *out;
|
|
size_t i;
|
|
const char *errstr;
|
|
|
|
/* Parse options */
|
|
for (i = 0; i < nopts; i++) {
|
|
if (strncmp(opts[i], "memory=", 7) == 0) {
|
|
memory = (u_int32_t)strtonum(opts[i]+7, 1,
|
|
UINT_MAX, &errstr);
|
|
if (errstr) {
|
|
fatal("Memory limit is %s: %s",
|
|
errstr, opts[i]+7);
|
|
}
|
|
} else if (strncmp(opts[i], "start=", 6) == 0) {
|
|
/* XXX - also compare length against bits */
|
|
if (BN_hex2bn(&start, opts[i]+6) == 0)
|
|
fatal("Invalid start point.");
|
|
} else if (strncmp(opts[i], "bits=", 5) == 0) {
|
|
moduli_bits = (int)strtonum(opts[i]+5, 1,
|
|
INT_MAX, &errstr);
|
|
if (errstr) {
|
|
fatal("Invalid number: %s (%s)",
|
|
opts[i]+12, errstr);
|
|
}
|
|
} else {
|
|
fatal("Option \"%s\" is unsupported for moduli "
|
|
"generation", opts[i]);
|
|
}
|
|
}
|
|
|
|
if ((out = fopen(out_file, "w")) == NULL) {
|
|
fatal("Couldn't open modulus candidate file \"%s\": %s",
|
|
out_file, strerror(errno));
|
|
}
|
|
setvbuf(out, NULL, _IOLBF, 0);
|
|
|
|
if (moduli_bits == 0)
|
|
moduli_bits = DEFAULT_BITS;
|
|
if (gen_candidates(out, memory, moduli_bits, start) != 0)
|
|
fatal("modulus candidate generation failed");
|
|
#else /* WITH_OPENSSL */
|
|
fatal("Moduli generation is not supported");
|
|
#endif /* WITH_OPENSSL */
|
|
}
|
|
|
|
static void
|
|
do_moduli_screen(const char *out_file, char **opts, size_t nopts)
|
|
{
|
|
#ifdef WITH_OPENSSL
|
|
/* Moduli generation/screening */
|
|
char *checkpoint = NULL;
|
|
u_int32_t generator_wanted = 0;
|
|
unsigned long start_lineno = 0, lines_to_process = 0;
|
|
int prime_tests = 0;
|
|
FILE *out, *in = stdin;
|
|
size_t i;
|
|
const char *errstr;
|
|
|
|
/* Parse options */
|
|
for (i = 0; i < nopts; i++) {
|
|
if (strncmp(opts[i], "lines=", 6) == 0) {
|
|
lines_to_process = strtoul(opts[i]+6, NULL, 10);
|
|
} else if (strncmp(opts[i], "start-line=", 11) == 0) {
|
|
start_lineno = strtoul(opts[i]+11, NULL, 10);
|
|
} else if (strncmp(opts[i], "checkpoint=", 11) == 0) {
|
|
free(checkpoint);
|
|
checkpoint = xstrdup(opts[i]+11);
|
|
} else if (strncmp(opts[i], "generator=", 10) == 0) {
|
|
generator_wanted = (u_int32_t)strtonum(
|
|
opts[i]+10, 1, UINT_MAX, &errstr);
|
|
if (errstr != NULL) {
|
|
fatal("Generator invalid: %s (%s)",
|
|
opts[i]+10, errstr);
|
|
}
|
|
} else if (strncmp(opts[i], "prime-tests=", 12) == 0) {
|
|
prime_tests = (int)strtonum(opts[i]+12, 1,
|
|
INT_MAX, &errstr);
|
|
if (errstr) {
|
|
fatal("Invalid number: %s (%s)",
|
|
opts[i]+12, errstr);
|
|
}
|
|
} else {
|
|
fatal("Option \"%s\" is unsupported for moduli "
|
|
"screening", opts[i]);
|
|
}
|
|
}
|
|
|
|
if (have_identity && strcmp(identity_file, "-") != 0) {
|
|
if ((in = fopen(identity_file, "r")) == NULL) {
|
|
fatal("Couldn't open modulus candidate "
|
|
"file \"%s\": %s", identity_file,
|
|
strerror(errno));
|
|
}
|
|
}
|
|
|
|
if ((out = fopen(out_file, "a")) == NULL) {
|
|
fatal("Couldn't open moduli file \"%s\": %s",
|
|
out_file, strerror(errno));
|
|
}
|
|
setvbuf(out, NULL, _IOLBF, 0);
|
|
if (prime_test(in, out, prime_tests == 0 ? 100 : prime_tests,
|
|
generator_wanted, checkpoint,
|
|
start_lineno, lines_to_process) != 0)
|
|
fatal("modulus screening failed");
|
|
if (in != stdin)
|
|
(void)fclose(in);
|
|
free(checkpoint);
|
|
#else /* WITH_OPENSSL */
|
|
fatal("Moduli screening is not supported");
|
|
#endif /* WITH_OPENSSL */
|
|
}
|
|
|
|
/* Read and confirm a passphrase */
|
|
static char *
|
|
read_check_passphrase(const char *prompt1, const char *prompt2,
|
|
const char *retry_prompt)
|
|
{
|
|
char *passphrase1, *passphrase2;
|
|
|
|
for (;;) {
|
|
passphrase1 = read_passphrase(prompt1, RP_ALLOW_STDIN);
|
|
passphrase2 = read_passphrase(prompt2, RP_ALLOW_STDIN);
|
|
if (strcmp(passphrase1, passphrase2) == 0) {
|
|
freezero(passphrase2, strlen(passphrase2));
|
|
return passphrase1;
|
|
}
|
|
/* The passphrases do not match. Clear them and retry. */
|
|
freezero(passphrase1, strlen(passphrase1));
|
|
freezero(passphrase2, strlen(passphrase2));
|
|
fputs(retry_prompt, stdout);
|
|
fputc('\n', stdout);
|
|
fflush(stdout);
|
|
}
|
|
/* NOTREACHED */
|
|
return NULL;
|
|
}
|
|
|
|
static char *
|
|
private_key_passphrase(void)
|
|
{
|
|
if (identity_passphrase)
|
|
return xstrdup(identity_passphrase);
|
|
if (identity_new_passphrase)
|
|
return xstrdup(identity_new_passphrase);
|
|
|
|
return read_check_passphrase(
|
|
"Enter passphrase (empty for no passphrase): ",
|
|
"Enter same passphrase again: ",
|
|
"Passphrases do not match. Try again.");
|
|
}
|
|
|
|
static char *
|
|
sk_suffix(const char *application, const uint8_t *user, size_t userlen)
|
|
{
|
|
char *ret, *cp;
|
|
size_t slen, i;
|
|
|
|
/* Trim off URL-like preamble */
|
|
if (strncmp(application, "ssh://", 6) == 0)
|
|
ret = xstrdup(application + 6);
|
|
else if (strncmp(application, "ssh:", 4) == 0)
|
|
ret = xstrdup(application + 4);
|
|
else
|
|
ret = xstrdup(application);
|
|
|
|
/* Count trailing zeros in user */
|
|
for (i = 0; i < userlen; i++) {
|
|
if (user[userlen - i - 1] != 0)
|
|
break;
|
|
}
|
|
if (i >= userlen)
|
|
return ret; /* user-id was default all-zeros */
|
|
|
|
/* Append user-id, escaping non-UTF-8 characters */
|
|
slen = userlen - i;
|
|
if (asmprintf(&cp, INT_MAX, NULL, "%.*s", (int)slen, user) == -1)
|
|
fatal_f("asmprintf failed");
|
|
/* Don't emit a user-id that contains path or control characters */
|
|
if (strchr(cp, '/') != NULL || strstr(cp, "..") != NULL ||
|
|
strchr(cp, '\\') != NULL) {
|
|
free(cp);
|
|
cp = tohex(user, slen);
|
|
}
|
|
xextendf(&ret, "_", "%s", cp);
|
|
free(cp);
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
do_download_sk(const char *skprovider, const char *device)
|
|
{
|
|
struct sshsk_resident_key **srks;
|
|
size_t nsrks, i;
|
|
int r, ret = -1;
|
|
char *fp, *pin = NULL, *pass = NULL, *path, *pubpath;
|
|
const char *ext;
|
|
struct sshkey *key;
|
|
|
|
if (skprovider == NULL)
|
|
fatal("Cannot download keys without provider");
|
|
|
|
pin = read_passphrase("Enter PIN for authenticator: ", RP_ALLOW_STDIN);
|
|
if (!quiet) {
|
|
printf("You may need to touch your authenticator "
|
|
"to authorize key download.\n");
|
|
}
|
|
if ((r = sshsk_load_resident(skprovider, device, pin, 0,
|
|
&srks, &nsrks)) != 0) {
|
|
if (pin != NULL)
|
|
freezero(pin, strlen(pin));
|
|
error_r(r, "Unable to load resident keys");
|
|
return -1;
|
|
}
|
|
if (nsrks == 0)
|
|
logit("No keys to download");
|
|
if (pin != NULL)
|
|
freezero(pin, strlen(pin));
|
|
|
|
for (i = 0; i < nsrks; i++) {
|
|
key = srks[i]->key;
|
|
if (key->type != KEY_ECDSA_SK && key->type != KEY_ED25519_SK) {
|
|
error("Unsupported key type %s (%d)",
|
|
sshkey_type(key), key->type);
|
|
continue;
|
|
}
|
|
if ((fp = sshkey_fingerprint(key, fingerprint_hash,
|
|
SSH_FP_DEFAULT)) == NULL)
|
|
fatal_f("sshkey_fingerprint failed");
|
|
debug_f("key %zu: %s %s %s (flags 0x%02x)", i,
|
|
sshkey_type(key), fp, key->sk_application, key->sk_flags);
|
|
ext = sk_suffix(key->sk_application,
|
|
srks[i]->user_id, srks[i]->user_id_len);
|
|
xasprintf(&path, "id_%s_rk%s%s",
|
|
key->type == KEY_ECDSA_SK ? "ecdsa_sk" : "ed25519_sk",
|
|
*ext == '\0' ? "" : "_", ext);
|
|
|
|
/* If the file already exists, ask the user to confirm. */
|
|
if (!confirm_overwrite(path)) {
|
|
free(path);
|
|
break;
|
|
}
|
|
|
|
/* Save the key with the application string as the comment */
|
|
if (pass == NULL)
|
|
pass = private_key_passphrase();
|
|
if ((r = sshkey_save_private(key, path, pass,
|
|
key->sk_application, private_key_format,
|
|
openssh_format_cipher, rounds)) != 0) {
|
|
error_r(r, "Saving key \"%s\" failed", path);
|
|
free(path);
|
|
break;
|
|
}
|
|
if (!quiet) {
|
|
printf("Saved %s key%s%s to %s\n", sshkey_type(key),
|
|
*ext != '\0' ? " " : "",
|
|
*ext != '\0' ? key->sk_application : "",
|
|
path);
|
|
}
|
|
|
|
/* Save public key too */
|
|
xasprintf(&pubpath, "%s.pub", path);
|
|
free(path);
|
|
if ((r = sshkey_save_public(key, pubpath,
|
|
key->sk_application)) != 0) {
|
|
error_r(r, "Saving public key \"%s\" failed", pubpath);
|
|
free(pubpath);
|
|
break;
|
|
}
|
|
free(pubpath);
|
|
}
|
|
|
|
if (i >= nsrks)
|
|
ret = 0; /* success */
|
|
if (pass != NULL)
|
|
freezero(pass, strlen(pass));
|
|
sshsk_free_resident_keys(srks, nsrks);
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
save_attestation(struct sshbuf *attest, const char *path)
|
|
{
|
|
mode_t omask;
|
|
int r;
|
|
|
|
if (path == NULL)
|
|
return; /* nothing to do */
|
|
if (attest == NULL || sshbuf_len(attest) == 0)
|
|
fatal("Enrollment did not return attestation data");
|
|
omask = umask(077);
|
|
r = sshbuf_write_file(path, attest);
|
|
umask(omask);
|
|
if (r != 0)
|
|
fatal_r(r, "Unable to write attestation data \"%s\"", path);
|
|
if (!quiet)
|
|
printf("Your FIDO attestation certificate has been saved in "
|
|
"%s\n", path);
|
|
}
|
|
|
|
static int
|
|
confirm_sk_overwrite(const char *application, const char *user)
|
|
{
|
|
char yesno[3];
|
|
|
|
printf("A resident key scoped to '%s' with user id '%s' already "
|
|
"exists.\n", application == NULL ? "ssh:" : application,
|
|
user == NULL ? "null" : user);
|
|
printf("Overwrite key in token (y/n)? ");
|
|
fflush(stdout);
|
|
if (fgets(yesno, sizeof(yesno), stdin) == NULL)
|
|
return 0;
|
|
if (yesno[0] != 'y' && yesno[0] != 'Y')
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
fprintf(stderr,
|
|
"usage: ssh-keygen [-q] [-a rounds] [-b bits] [-C comment] [-f output_keyfile]\n"
|
|
" [-m format] [-N new_passphrase] [-O option]\n"
|
|
" [-t dsa | ecdsa | ecdsa-sk | ed25519 | ed25519-sk | rsa]\n"
|
|
" [-w provider] [-Z cipher]\n"
|
|
" ssh-keygen -p [-a rounds] [-f keyfile] [-m format] [-N new_passphrase]\n"
|
|
" [-P old_passphrase] [-Z cipher]\n"
|
|
#ifdef WITH_OPENSSL
|
|
" ssh-keygen -i [-f input_keyfile] [-m key_format]\n"
|
|
" ssh-keygen -e [-f input_keyfile] [-m key_format]\n"
|
|
#endif
|
|
" ssh-keygen -y [-f input_keyfile]\n"
|
|
" ssh-keygen -c [-a rounds] [-C comment] [-f keyfile] [-P passphrase]\n"
|
|
" ssh-keygen -l [-v] [-E fingerprint_hash] [-f input_keyfile]\n"
|
|
" ssh-keygen -B [-f input_keyfile]\n");
|
|
#ifdef ENABLE_PKCS11
|
|
fprintf(stderr,
|
|
" ssh-keygen -D pkcs11\n");
|
|
#endif
|
|
fprintf(stderr,
|
|
" ssh-keygen -F hostname [-lv] [-f known_hosts_file]\n"
|
|
" ssh-keygen -H [-f known_hosts_file]\n"
|
|
" ssh-keygen -K [-a rounds] [-w provider]\n"
|
|
" ssh-keygen -R hostname [-f known_hosts_file]\n"
|
|
" ssh-keygen -r hostname [-g] [-f input_keyfile]\n"
|
|
#ifdef WITH_OPENSSL
|
|
" ssh-keygen -M generate [-O option] output_file\n"
|
|
" ssh-keygen -M screen [-f input_file] [-O option] output_file\n"
|
|
#endif
|
|
" ssh-keygen -I certificate_identity -s ca_key [-hU] [-D pkcs11_provider]\n"
|
|
" [-n principals] [-O option] [-V validity_interval]\n"
|
|
" [-z serial_number] file ...\n"
|
|
" ssh-keygen -L [-f input_keyfile]\n"
|
|
" ssh-keygen -A [-a rounds] [-f prefix_path]\n"
|
|
" ssh-keygen -k -f krl_file [-u] [-s ca_public] [-z version_number]\n"
|
|
" file ...\n"
|
|
" ssh-keygen -Q [-l] -f krl_file [file ...]\n"
|
|
" ssh-keygen -Y find-principals -s signature_file -f allowed_signers_file\n"
|
|
" ssh-keygen -Y match-principals -I signer_identity -f allowed_signers_file\n"
|
|
" ssh-keygen -Y check-novalidate -n namespace -s signature_file\n"
|
|
" ssh-keygen -Y sign -f key_file -n namespace file [-O option] ...\n"
|
|
" ssh-keygen -Y verify -f allowed_signers_file -I signer_identity\n"
|
|
" -n namespace -s signature_file [-r krl_file] [-O option]\n");
|
|
exit(1);
|
|
}
|
|
|
|
/*
|
|
* Main program for key management.
|
|
*/
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
char comment[1024], *passphrase = NULL;
|
|
char *rr_hostname = NULL, *ep, *fp, *ra;
|
|
struct sshkey *private, *public;
|
|
struct passwd *pw;
|
|
int r, opt, type;
|
|
int change_passphrase = 0, change_comment = 0, show_cert = 0;
|
|
int find_host = 0, delete_host = 0, hash_hosts = 0;
|
|
int gen_all_hostkeys = 0, gen_krl = 0, update_krl = 0, check_krl = 0;
|
|
int prefer_agent = 0, convert_to = 0, convert_from = 0;
|
|
int print_public = 0, print_generic = 0, cert_serial_autoinc = 0;
|
|
int do_gen_candidates = 0, do_screen_candidates = 0, download_sk = 0;
|
|
unsigned long long cert_serial = 0;
|
|
char *identity_comment = NULL, *ca_key_path = NULL, **opts = NULL;
|
|
char *sk_application = NULL, *sk_device = NULL, *sk_user = NULL;
|
|
char *sk_attestation_path = NULL;
|
|
struct sshbuf *challenge = NULL, *attest = NULL;
|
|
size_t i, nopts = 0;
|
|
u_int32_t bits = 0;
|
|
uint8_t sk_flags = SSH_SK_USER_PRESENCE_REQD;
|
|
const char *errstr;
|
|
int log_level = SYSLOG_LEVEL_INFO;
|
|
char *sign_op = NULL;
|
|
|
|
extern int optind;
|
|
extern char *optarg;
|
|
|
|
/* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
|
|
sanitise_stdfd();
|
|
|
|
__progname = ssh_get_progname(argv[0]);
|
|
|
|
seed_rng();
|
|
|
|
log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1);
|
|
|
|
msetlocale();
|
|
|
|
/* we need this for the home * directory. */
|
|
pw = getpwuid(getuid());
|
|
if (!pw)
|
|
fatal("No user exists for uid %lu", (u_long)getuid());
|
|
pw = pwcopy(pw);
|
|
if (gethostname(hostname, sizeof(hostname)) == -1)
|
|
fatal("gethostname: %s", strerror(errno));
|
|
|
|
sk_provider = getenv("SSH_SK_PROVIDER");
|
|
|
|
/* Remaining characters: dGjJSTWx */
|
|
while ((opt = getopt(argc, argv, "ABHKLQUXceghiklopquvy"
|
|
"C:D:E:F:I:M:N:O:P:R:V:Y:Z:"
|
|
"a:b:f:g:m:n:r:s:t:w:z:")) != -1) {
|
|
switch (opt) {
|
|
case 'A':
|
|
gen_all_hostkeys = 1;
|
|
break;
|
|
case 'b':
|
|
bits = (u_int32_t)strtonum(optarg, 1, UINT32_MAX,
|
|
&errstr);
|
|
if (errstr)
|
|
fatal("Bits has bad value %s (%s)",
|
|
optarg, errstr);
|
|
break;
|
|
case 'E':
|
|
fingerprint_hash = ssh_digest_alg_by_name(optarg);
|
|
if (fingerprint_hash == -1)
|
|
fatal("Invalid hash algorithm \"%s\"", optarg);
|
|
break;
|
|
case 'F':
|
|
find_host = 1;
|
|
rr_hostname = optarg;
|
|
break;
|
|
case 'H':
|
|
hash_hosts = 1;
|
|
break;
|
|
case 'I':
|
|
cert_key_id = optarg;
|
|
break;
|
|
case 'R':
|
|
delete_host = 1;
|
|
rr_hostname = optarg;
|
|
break;
|
|
case 'L':
|
|
show_cert = 1;
|
|
break;
|
|
case 'l':
|
|
print_fingerprint = 1;
|
|
break;
|
|
case 'B':
|
|
print_bubblebabble = 1;
|
|
break;
|
|
case 'm':
|
|
if (strcasecmp(optarg, "RFC4716") == 0 ||
|
|
strcasecmp(optarg, "ssh2") == 0) {
|
|
convert_format = FMT_RFC4716;
|
|
break;
|
|
}
|
|
if (strcasecmp(optarg, "PKCS8") == 0) {
|
|
convert_format = FMT_PKCS8;
|
|
private_key_format = SSHKEY_PRIVATE_PKCS8;
|
|
break;
|
|
}
|
|
if (strcasecmp(optarg, "PEM") == 0) {
|
|
convert_format = FMT_PEM;
|
|
private_key_format = SSHKEY_PRIVATE_PEM;
|
|
break;
|
|
}
|
|
fatal("Unsupported conversion format \"%s\"", optarg);
|
|
case 'n':
|
|
cert_principals = optarg;
|
|
break;
|
|
case 'o':
|
|
/* no-op; new format is already the default */
|
|
break;
|
|
case 'p':
|
|
change_passphrase = 1;
|
|
break;
|
|
case 'c':
|
|
change_comment = 1;
|
|
break;
|
|
case 'f':
|
|
if (strlcpy(identity_file, optarg,
|
|
sizeof(identity_file)) >= sizeof(identity_file))
|
|
fatal("Identity filename too long");
|
|
have_identity = 1;
|
|
break;
|
|
case 'g':
|
|
print_generic = 1;
|
|
break;
|
|
case 'K':
|
|
download_sk = 1;
|
|
break;
|
|
case 'P':
|
|
identity_passphrase = optarg;
|
|
break;
|
|
case 'N':
|
|
identity_new_passphrase = optarg;
|
|
break;
|
|
case 'Q':
|
|
check_krl = 1;
|
|
break;
|
|
case 'O':
|
|
opts = xrecallocarray(opts, nopts, nopts + 1,
|
|
sizeof(*opts));
|
|
opts[nopts++] = xstrdup(optarg);
|
|
break;
|
|
case 'Z':
|
|
openssh_format_cipher = optarg;
|
|
if (cipher_by_name(openssh_format_cipher) == NULL)
|
|
fatal("Invalid OpenSSH-format cipher '%s'",
|
|
openssh_format_cipher);
|
|
break;
|
|
case 'C':
|
|
identity_comment = optarg;
|
|
break;
|
|
case 'q':
|
|
quiet = 1;
|
|
break;
|
|
case 'e':
|
|
/* export key */
|
|
convert_to = 1;
|
|
break;
|
|
case 'h':
|
|
cert_key_type = SSH2_CERT_TYPE_HOST;
|
|
certflags_flags = 0;
|
|
break;
|
|
case 'k':
|
|
gen_krl = 1;
|
|
break;
|
|
case 'i':
|
|
case 'X':
|
|
/* import key */
|
|
convert_from = 1;
|
|
break;
|
|
case 'y':
|
|
print_public = 1;
|
|
break;
|
|
case 's':
|
|
ca_key_path = optarg;
|
|
break;
|
|
case 't':
|
|
key_type_name = optarg;
|
|
break;
|
|
case 'D':
|
|
pkcs11provider = optarg;
|
|
break;
|
|
case 'U':
|
|
prefer_agent = 1;
|
|
break;
|
|
case 'u':
|
|
update_krl = 1;
|
|
break;
|
|
case 'v':
|
|
if (log_level == SYSLOG_LEVEL_INFO)
|
|
log_level = SYSLOG_LEVEL_DEBUG1;
|
|
else {
|
|
if (log_level >= SYSLOG_LEVEL_DEBUG1 &&
|
|
log_level < SYSLOG_LEVEL_DEBUG3)
|
|
log_level++;
|
|
}
|
|
break;
|
|
case 'r':
|
|
rr_hostname = optarg;
|
|
break;
|
|
case 'a':
|
|
rounds = (int)strtonum(optarg, 1, INT_MAX, &errstr);
|
|
if (errstr)
|
|
fatal("Invalid number: %s (%s)",
|
|
optarg, errstr);
|
|
break;
|
|
case 'V':
|
|
parse_cert_times(optarg);
|
|
break;
|
|
case 'Y':
|
|
sign_op = optarg;
|
|
break;
|
|
case 'w':
|
|
sk_provider = optarg;
|
|
break;
|
|
case 'z':
|
|
errno = 0;
|
|
if (*optarg == '+') {
|
|
cert_serial_autoinc = 1;
|
|
optarg++;
|
|
}
|
|
cert_serial = strtoull(optarg, &ep, 10);
|
|
if (*optarg < '0' || *optarg > '9' || *ep != '\0' ||
|
|
(errno == ERANGE && cert_serial == ULLONG_MAX))
|
|
fatal("Invalid serial number \"%s\"", optarg);
|
|
break;
|
|
case 'M':
|
|
if (strcmp(optarg, "generate") == 0)
|
|
do_gen_candidates = 1;
|
|
else if (strcmp(optarg, "screen") == 0)
|
|
do_screen_candidates = 1;
|
|
else
|
|
fatal("Unsupported moduli option %s", optarg);
|
|
break;
|
|
default:
|
|
usage();
|
|
}
|
|
}
|
|
|
|
#ifdef ENABLE_SK_INTERNAL
|
|
if (sk_provider == NULL)
|
|
sk_provider = "internal";
|
|
#endif
|
|
|
|
/* reinit */
|
|
log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1);
|
|
|
|
argv += optind;
|
|
argc -= optind;
|
|
|
|
if (sign_op != NULL) {
|
|
if (strncmp(sign_op, "find-principals", 15) == 0) {
|
|
if (ca_key_path == NULL) {
|
|
error("Too few arguments for find-principals:"
|
|
"missing signature file");
|
|
exit(1);
|
|
}
|
|
if (!have_identity) {
|
|
error("Too few arguments for find-principals:"
|
|
"missing allowed keys file");
|
|
exit(1);
|
|
}
|
|
return sig_find_principals(ca_key_path, identity_file,
|
|
opts, nopts);
|
|
} else if (strncmp(sign_op, "match-principals", 16) == 0) {
|
|
if (!have_identity) {
|
|
error("Too few arguments for match-principals:"
|
|
"missing allowed keys file");
|
|
exit(1);
|
|
}
|
|
if (cert_key_id == NULL) {
|
|
error("Too few arguments for match-principals: "
|
|
"missing principal ID");
|
|
exit(1);
|
|
}
|
|
return sig_match_principals(identity_file, cert_key_id,
|
|
opts, nopts);
|
|
} else if (strncmp(sign_op, "sign", 4) == 0) {
|
|
/* NB. cert_principals is actually namespace, via -n */
|
|
if (cert_principals == NULL ||
|
|
*cert_principals == '\0') {
|
|
error("Too few arguments for sign: "
|
|
"missing namespace");
|
|
exit(1);
|
|
}
|
|
if (!have_identity) {
|
|
error("Too few arguments for sign: "
|
|
"missing key");
|
|
exit(1);
|
|
}
|
|
return sig_sign(identity_file, cert_principals,
|
|
prefer_agent, argc, argv, opts, nopts);
|
|
} else if (strncmp(sign_op, "check-novalidate", 16) == 0) {
|
|
/* NB. cert_principals is actually namespace, via -n */
|
|
if (cert_principals == NULL ||
|
|
*cert_principals == '\0') {
|
|
error("Too few arguments for check-novalidate: "
|
|
"missing namespace");
|
|
exit(1);
|
|
}
|
|
if (ca_key_path == NULL) {
|
|
error("Too few arguments for check-novalidate: "
|
|
"missing signature file");
|
|
exit(1);
|
|
}
|
|
return sig_verify(ca_key_path, cert_principals,
|
|
NULL, NULL, NULL, opts, nopts);
|
|
} else if (strncmp(sign_op, "verify", 6) == 0) {
|
|
/* NB. cert_principals is actually namespace, via -n */
|
|
if (cert_principals == NULL ||
|
|
*cert_principals == '\0') {
|
|
error("Too few arguments for verify: "
|
|
"missing namespace");
|
|
exit(1);
|
|
}
|
|
if (ca_key_path == NULL) {
|
|
error("Too few arguments for verify: "
|
|
"missing signature file");
|
|
exit(1);
|
|
}
|
|
if (!have_identity) {
|
|
error("Too few arguments for sign: "
|
|
"missing allowed keys file");
|
|
exit(1);
|
|
}
|
|
if (cert_key_id == NULL) {
|
|
error("Too few arguments for verify: "
|
|
"missing principal identity");
|
|
exit(1);
|
|
}
|
|
return sig_verify(ca_key_path, cert_principals,
|
|
cert_key_id, identity_file, rr_hostname,
|
|
opts, nopts);
|
|
}
|
|
error("Unsupported operation for -Y: \"%s\"", sign_op);
|
|
usage();
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
if (ca_key_path != NULL) {
|
|
if (argc < 1 && !gen_krl) {
|
|
error("Too few arguments.");
|
|
usage();
|
|
}
|
|
} else if (argc > 0 && !gen_krl && !check_krl &&
|
|
!do_gen_candidates && !do_screen_candidates) {
|
|
error("Too many arguments.");
|
|
usage();
|
|
}
|
|
if (change_passphrase && change_comment) {
|
|
error("Can only have one of -p and -c.");
|
|
usage();
|
|
}
|
|
if (print_fingerprint && (delete_host || hash_hosts)) {
|
|
error("Cannot use -l with -H or -R.");
|
|
usage();
|
|
}
|
|
if (gen_krl) {
|
|
do_gen_krl(pw, update_krl, ca_key_path,
|
|
cert_serial, identity_comment, argc, argv);
|
|
return (0);
|
|
}
|
|
if (check_krl) {
|
|
do_check_krl(pw, print_fingerprint, argc, argv);
|
|
return (0);
|
|
}
|
|
if (ca_key_path != NULL) {
|
|
if (cert_key_id == NULL)
|
|
fatal("Must specify key id (-I) when certifying");
|
|
for (i = 0; i < nopts; i++)
|
|
add_cert_option(opts[i]);
|
|
do_ca_sign(pw, ca_key_path, prefer_agent,
|
|
cert_serial, cert_serial_autoinc, argc, argv);
|
|
}
|
|
if (show_cert)
|
|
do_show_cert(pw);
|
|
if (delete_host || hash_hosts || find_host) {
|
|
do_known_hosts(pw, rr_hostname, find_host,
|
|
delete_host, hash_hosts);
|
|
}
|
|
if (pkcs11provider != NULL)
|
|
do_download(pw);
|
|
if (download_sk) {
|
|
for (i = 0; i < nopts; i++) {
|
|
if (strncasecmp(opts[i], "device=", 7) == 0) {
|
|
sk_device = xstrdup(opts[i] + 7);
|
|
} else {
|
|
fatal("Option \"%s\" is unsupported for "
|
|
"FIDO authenticator download", opts[i]);
|
|
}
|
|
}
|
|
return do_download_sk(sk_provider, sk_device);
|
|
}
|
|
if (print_fingerprint || print_bubblebabble)
|
|
do_fingerprint(pw);
|
|
if (change_passphrase)
|
|
do_change_passphrase(pw);
|
|
if (change_comment)
|
|
do_change_comment(pw, identity_comment);
|
|
#ifdef WITH_OPENSSL
|
|
if (convert_to)
|
|
do_convert_to(pw);
|
|
if (convert_from)
|
|
do_convert_from(pw);
|
|
#else /* WITH_OPENSSL */
|
|
if (convert_to || convert_from)
|
|
fatal("key conversion disabled at compile time");
|
|
#endif /* WITH_OPENSSL */
|
|
if (print_public)
|
|
do_print_public(pw);
|
|
if (rr_hostname != NULL) {
|
|
unsigned int n = 0;
|
|
|
|
if (have_identity) {
|
|
n = do_print_resource_record(pw, identity_file,
|
|
rr_hostname, print_generic, opts, nopts);
|
|
if (n == 0)
|
|
fatal("%s: %s", identity_file, strerror(errno));
|
|
exit(0);
|
|
} else {
|
|
|
|
n += do_print_resource_record(pw,
|
|
_PATH_HOST_RSA_KEY_FILE, rr_hostname,
|
|
print_generic, opts, nopts);
|
|
#ifdef WITH_DSA
|
|
n += do_print_resource_record(pw,
|
|
_PATH_HOST_DSA_KEY_FILE, rr_hostname,
|
|
print_generic, opts, nopts);
|
|
#endif
|
|
n += do_print_resource_record(pw,
|
|
_PATH_HOST_ECDSA_KEY_FILE, rr_hostname,
|
|
print_generic, opts, nopts);
|
|
n += do_print_resource_record(pw,
|
|
_PATH_HOST_ED25519_KEY_FILE, rr_hostname,
|
|
print_generic, opts, nopts);
|
|
n += do_print_resource_record(pw,
|
|
_PATH_HOST_XMSS_KEY_FILE, rr_hostname,
|
|
print_generic, opts, nopts);
|
|
if (n == 0)
|
|
fatal("no keys found.");
|
|
exit(0);
|
|
}
|
|
}
|
|
|
|
if (do_gen_candidates || do_screen_candidates) {
|
|
if (argc <= 0)
|
|
fatal("No output file specified");
|
|
else if (argc > 1)
|
|
fatal("Too many output files specified");
|
|
}
|
|
if (do_gen_candidates) {
|
|
do_moduli_gen(argv[0], opts, nopts);
|
|
return 0;
|
|
}
|
|
if (do_screen_candidates) {
|
|
do_moduli_screen(argv[0], opts, nopts);
|
|
return 0;
|
|
}
|
|
|
|
if (gen_all_hostkeys) {
|
|
do_gen_all_hostkeys(pw);
|
|
return (0);
|
|
}
|
|
|
|
if (key_type_name == NULL)
|
|
key_type_name = DEFAULT_KEY_TYPE_NAME;
|
|
|
|
type = sshkey_type_from_name(key_type_name);
|
|
type_bits_valid(type, key_type_name, &bits);
|
|
|
|
if (!quiet)
|
|
printf("Generating public/private %s key pair.\n",
|
|
key_type_name);
|
|
switch (type) {
|
|
case KEY_ECDSA_SK:
|
|
case KEY_ED25519_SK:
|
|
for (i = 0; i < nopts; i++) {
|
|
if (strcasecmp(opts[i], "no-touch-required") == 0) {
|
|
sk_flags &= ~SSH_SK_USER_PRESENCE_REQD;
|
|
} else if (strcasecmp(opts[i], "verify-required") == 0) {
|
|
sk_flags |= SSH_SK_USER_VERIFICATION_REQD;
|
|
} else if (strcasecmp(opts[i], "resident") == 0) {
|
|
sk_flags |= SSH_SK_RESIDENT_KEY;
|
|
} else if (strncasecmp(opts[i], "device=", 7) == 0) {
|
|
sk_device = xstrdup(opts[i] + 7);
|
|
} else if (strncasecmp(opts[i], "user=", 5) == 0) {
|
|
sk_user = xstrdup(opts[i] + 5);
|
|
} else if (strncasecmp(opts[i], "challenge=", 10) == 0) {
|
|
if ((r = sshbuf_load_file(opts[i] + 10,
|
|
&challenge)) != 0) {
|
|
fatal_r(r, "Unable to load FIDO "
|
|
"enrollment challenge \"%s\"",
|
|
opts[i] + 10);
|
|
}
|
|
} else if (strncasecmp(opts[i],
|
|
"write-attestation=", 18) == 0) {
|
|
sk_attestation_path = opts[i] + 18;
|
|
} else if (strncasecmp(opts[i],
|
|
"application=", 12) == 0) {
|
|
sk_application = xstrdup(opts[i] + 12);
|
|
if (strncmp(sk_application, "ssh:", 4) != 0) {
|
|
fatal("FIDO application string must "
|
|
"begin with \"ssh:\"");
|
|
}
|
|
} else {
|
|
fatal("Option \"%s\" is unsupported for "
|
|
"FIDO authenticator enrollment", opts[i]);
|
|
}
|
|
}
|
|
if ((attest = sshbuf_new()) == NULL)
|
|
fatal("sshbuf_new failed");
|
|
r = 0;
|
|
for (i = 0 ;;) {
|
|
if (!quiet) {
|
|
printf("You may need to touch your "
|
|
"authenticator%s to authorize key "
|
|
"generation.\n",
|
|
r == 0 ? "" : " again");
|
|
}
|
|
fflush(stdout);
|
|
r = sshsk_enroll(type, sk_provider, sk_device,
|
|
sk_application == NULL ? "ssh:" : sk_application,
|
|
sk_user, sk_flags, passphrase, challenge,
|
|
&private, attest);
|
|
if (r == 0)
|
|
break;
|
|
if (r == SSH_ERR_KEY_BAD_PERMISSIONS &&
|
|
(sk_flags & SSH_SK_RESIDENT_KEY) != 0 &&
|
|
(sk_flags & SSH_SK_FORCE_OPERATION) == 0 &&
|
|
confirm_sk_overwrite(sk_application, sk_user)) {
|
|
sk_flags |= SSH_SK_FORCE_OPERATION;
|
|
continue;
|
|
}
|
|
if (r != SSH_ERR_KEY_WRONG_PASSPHRASE)
|
|
fatal_r(r, "Key enrollment failed");
|
|
else if (passphrase != NULL) {
|
|
error("PIN incorrect");
|
|
freezero(passphrase, strlen(passphrase));
|
|
passphrase = NULL;
|
|
}
|
|
if (++i >= 3)
|
|
fatal("Too many incorrect PINs");
|
|
passphrase = read_passphrase("Enter PIN for "
|
|
"authenticator: ", RP_ALLOW_STDIN);
|
|
}
|
|
if (passphrase != NULL) {
|
|
freezero(passphrase, strlen(passphrase));
|
|
passphrase = NULL;
|
|
}
|
|
break;
|
|
default:
|
|
if ((r = sshkey_generate(type, bits, &private)) != 0)
|
|
fatal("sshkey_generate failed");
|
|
break;
|
|
}
|
|
if ((r = sshkey_from_private(private, &public)) != 0)
|
|
fatal_r(r, "sshkey_from_private");
|
|
|
|
if (!have_identity)
|
|
ask_filename(pw, "Enter file in which to save the key");
|
|
|
|
/* Create ~/.ssh directory if it doesn't already exist. */
|
|
hostfile_create_user_ssh_dir(identity_file, !quiet);
|
|
|
|
/* If the file already exists, ask the user to confirm. */
|
|
if (!confirm_overwrite(identity_file))
|
|
exit(1);
|
|
|
|
/* Determine the passphrase for the private key */
|
|
passphrase = private_key_passphrase();
|
|
if (identity_comment) {
|
|
strlcpy(comment, identity_comment, sizeof(comment));
|
|
} else {
|
|
/* Create default comment field for the passphrase. */
|
|
snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname);
|
|
}
|
|
|
|
/* Save the key with the given passphrase and comment. */
|
|
if ((r = sshkey_save_private(private, identity_file, passphrase,
|
|
comment, private_key_format, openssh_format_cipher, rounds)) != 0) {
|
|
error_r(r, "Saving key \"%s\" failed", identity_file);
|
|
freezero(passphrase, strlen(passphrase));
|
|
exit(1);
|
|
}
|
|
freezero(passphrase, strlen(passphrase));
|
|
sshkey_free(private);
|
|
|
|
if (!quiet) {
|
|
printf("Your identification has been saved in %s\n",
|
|
identity_file);
|
|
}
|
|
|
|
strlcat(identity_file, ".pub", sizeof(identity_file));
|
|
if ((r = sshkey_save_public(public, identity_file, comment)) != 0)
|
|
fatal_r(r, "Unable to save public key to %s", identity_file);
|
|
|
|
if (!quiet) {
|
|
fp = sshkey_fingerprint(public, fingerprint_hash,
|
|
SSH_FP_DEFAULT);
|
|
ra = sshkey_fingerprint(public, fingerprint_hash,
|
|
SSH_FP_RANDOMART);
|
|
if (fp == NULL || ra == NULL)
|
|
fatal("sshkey_fingerprint failed");
|
|
printf("Your public key has been saved in %s\n",
|
|
identity_file);
|
|
printf("The key fingerprint is:\n");
|
|
printf("%s %s\n", fp, comment);
|
|
printf("The key's randomart image is:\n");
|
|
printf("%s\n", ra);
|
|
free(ra);
|
|
free(fp);
|
|
}
|
|
|
|
if (sk_attestation_path != NULL)
|
|
save_attestation(attest, sk_attestation_path);
|
|
|
|
sshbuf_free(attest);
|
|
sshkey_free(public);
|
|
|
|
exit(0);
|
|
}
|