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041ab7c1e7
[kex.c kex.h kexecdh.c key.c key.h monitor.c ssh-ecdsa.c]
ECDH/ECDSA compliance fix: these methods vary the hash function they use
(SHA256/384/512) depending on the length of the curve in use. The previous
code incorrectly used SHA256 in all cases.
This fix will cause authentication failure when using 384 or 521-bit curve
keys if one peer hasn't been upgraded and the other has. (256-bit curve
keys work ok). In particular you may need to specify HostkeyAlgorithms
when connecting to a server that has not been upgraded from an upgraded
client.
ok naddy@
144 lines
4.6 KiB
C
144 lines
4.6 KiB
C
/* $OpenBSD: key.h,v 1.32 2010/09/09 10:45:45 djm Exp $ */
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/*
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* Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef KEY_H
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#define KEY_H
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#include "buffer.h"
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#include <openssl/rsa.h>
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#include <openssl/dsa.h>
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#include <openssl/ec.h>
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typedef struct Key Key;
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enum types {
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KEY_RSA1,
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KEY_RSA,
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KEY_DSA,
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KEY_ECDSA,
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KEY_RSA_CERT,
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KEY_DSA_CERT,
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KEY_ECDSA_CERT,
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KEY_RSA_CERT_V00,
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KEY_DSA_CERT_V00,
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KEY_UNSPEC
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};
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enum fp_type {
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SSH_FP_SHA1,
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SSH_FP_MD5
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};
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enum fp_rep {
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SSH_FP_HEX,
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SSH_FP_BUBBLEBABBLE,
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SSH_FP_RANDOMART
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};
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/* key is stored in external hardware */
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#define KEY_FLAG_EXT 0x0001
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#define CERT_MAX_PRINCIPALS 256
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struct KeyCert {
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Buffer certblob; /* Kept around for use on wire */
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u_int type; /* SSH2_CERT_TYPE_USER or SSH2_CERT_TYPE_HOST */
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u_int64_t serial;
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char *key_id;
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u_int nprincipals;
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char **principals;
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u_int64_t valid_after, valid_before;
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Buffer critical;
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Buffer extensions;
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Key *signature_key;
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};
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struct Key {
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int type;
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int flags;
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RSA *rsa;
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DSA *dsa;
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int ecdsa_nid; /* NID of curve */
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EC_KEY *ecdsa;
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struct KeyCert *cert;
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};
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Key *key_new(int);
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void key_add_private(Key *);
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Key *key_new_private(int);
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void key_free(Key *);
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Key *key_demote(const Key *);
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int key_equal_public(const Key *, const Key *);
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int key_equal(const Key *, const Key *);
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char *key_fingerprint(Key *, enum fp_type, enum fp_rep);
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u_char *key_fingerprint_raw(Key *, enum fp_type, u_int *);
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const char *key_type(const Key *);
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const char *key_cert_type(const Key *);
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int key_write(const Key *, FILE *);
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int key_read(Key *, char **);
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u_int key_size(const Key *);
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Key *key_generate(int, u_int);
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Key *key_from_private(const Key *);
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int key_type_from_name(char *);
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int key_is_cert(const Key *);
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int key_type_plain(int);
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int key_to_certified(Key *, int);
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int key_drop_cert(Key *);
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int key_certify(Key *, Key *);
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void key_cert_copy(const Key *, struct Key *);
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int key_cert_check_authority(const Key *, int, int, const char *,
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const char **);
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int key_cert_is_legacy(Key *);
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int key_ecdsa_nid_from_name(const char *);
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int key_curve_name_to_nid(const char *);
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const char * key_curve_nid_to_name(int);
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u_int key_curve_nid_to_bits(int);
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int key_ecdsa_bits_to_nid(int);
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int key_ecdsa_group_to_nid(const EC_GROUP *);
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const EVP_MD * key_ec_nid_to_evpmd(int nid);
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int key_ec_validate_public(const EC_GROUP *, const EC_POINT *);
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int key_ec_validate_private(const EC_KEY *);
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Key *key_from_blob(const u_char *, u_int);
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int key_to_blob(const Key *, u_char **, u_int *);
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const char *key_ssh_name(const Key *);
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const char *key_ssh_name_plain(const Key *);
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int key_names_valid2(const char *);
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int key_sign(const Key *, u_char **, u_int *, const u_char *, u_int);
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int key_verify(const Key *, const u_char *, u_int, const u_char *, u_int);
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int ssh_dss_sign(const Key *, u_char **, u_int *, const u_char *, u_int);
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int ssh_dss_verify(const Key *, const u_char *, u_int, const u_char *, u_int);
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int ssh_ecdsa_sign(const Key *, u_char **, u_int *, const u_char *, u_int);
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int ssh_ecdsa_verify(const Key *, const u_char *, u_int, const u_char *, u_int);
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int ssh_rsa_sign(const Key *, u_char **, u_int *, const u_char *, u_int);
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int ssh_rsa_verify(const Key *, const u_char *, u_int, const u_char *, u_int);
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#if defined(DEBUG_KEXECDH) || defined(DEBUG_PK)
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void key_dump_ec_point(const EC_GROUP *, const EC_POINT *);
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void key_dump_ec_key(const EC_KEY *);
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#endif
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#endif
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