openssh/auth-rsa.c

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1999-10-27 03:42:43 +00:00
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
* All rights reserved
* RSA-based authentication. This code determines whether to admit a login
* based on RSA authentication. This file also contains functions to check
* validity of the host key.
*
- (djm) Merge OpenBSD changes: - markus@cvs.openbsd.org 2000/09/05 02:59:57 [session.c] print hostname (not hushlogin) - markus@cvs.openbsd.org 2000/09/05 13:18:48 [authfile.c ssh-add.c] enable ssh-add -d for DSA keys - markus@cvs.openbsd.org 2000/09/05 13:20:49 [sftp-server.c] cleanup - markus@cvs.openbsd.org 2000/09/06 03:46:41 [authfile.h] prototype - deraadt@cvs.openbsd.org 2000/09/07 14:27:56 [ALL] cleanup copyright notices on all files. I have attempted to be accurate with the details. everything is now under Tatu's licence (which I copied from his readme), and/or the core-sdi bsd-ish thing for deattack, or various openbsd developers under a 2-term bsd licence. We're not changing any rules, just being accurate. - markus@cvs.openbsd.org 2000/09/07 14:40:30 [channels.c channels.h clientloop.c serverloop.c ssh.c] cleanup window and packet sizes for ssh2 flow control; ok niels - markus@cvs.openbsd.org 2000/09/07 14:53:00 [scp.c] typo - markus@cvs.openbsd.org 2000/09/07 15:13:37 [auth-options.c auth-options.h auth-rh-rsa.c auth-rsa.c auth.c] [authfile.h canohost.c channels.h compat.c hostfile.h log.c match.h] [pty.c readconf.c] some more Copyright fixes - markus@cvs.openbsd.org 2000/09/08 03:02:51 [README.openssh2] bye bye - deraadt@cvs.openbsd.org 2000/09/11 18:38:33 [LICENCE cipher.c] a few more comments about it being ARC4 not RC4 - markus@cvs.openbsd.org 2000/09/12 14:53:11 [log-client.c log-server.c log.c ssh.1 ssh.c ssh.h sshd.8 sshd.c] multiple debug levels - markus@cvs.openbsd.org 2000/09/14 14:25:15 [clientloop.c] typo - deraadt@cvs.openbsd.org 2000/09/15 01:13:51 [ssh-agent.c] check return value for setenv(3) for failure, and deal appropriately
2000-09-16 02:29:08 +00:00
* As far as I am concerned, the code I have written for this software
* can be used freely for any purpose. Any derived versions of this
* software must be clearly marked as such, and if the derived work is
* incompatible with the protocol description in the RFC file, it must be
* called by a name other than "ssh" or "Secure Shell".
*/
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#include "includes.h"
RCSID("$OpenBSD: auth-rsa.c,v 1.52 2002/03/18 17:50:31 provos Exp $");
Hopefully things did not get mixed around too much. It compiles under Linux and works. So that is at least a good sign. =) 20010122 - (bal) OpenBSD Resync - markus@cvs.openbsd.org 2001/01/19 12:45:26 GMT 2001 by markus [servconf.c ssh.h sshd.c] only auth-chall.c needs #ifdef SKEY - markus@cvs.openbsd.org 2001/01/19 15:55:10 GMT 2001 by markus [auth-krb4.c auth-options.c auth-rh-rsa.c auth-rhosts.c auth-rsa.c auth1.c auth2.c channels.c clientloop.c dh.c dispatch.c nchan.c packet.c pathname.h readconf.c scp.c servconf.c serverloop.c session.c ssh-add.c ssh-keygen.c ssh-keyscan.c ssh.c ssh.h ssh1.h sshconnect1.c sshd.c ttymodes.c] move ssh1 definitions to ssh1.h, pathnames to pathnames.h - markus@cvs.openbsd.org 2001/01/19 16:48:14 [sshd.8] fix typo; from stevesk@ - markus@cvs.openbsd.org 2001/01/19 16:50:58 [ssh-dss.c] clear and free digest, make consistent with other code (use dlen); from stevesk@ - markus@cvs.openbsd.org 2001/01/20 15:55:20 GMT 2001 by markus [auth-options.c auth-options.h auth-rsa.c auth2.c] pass the filename to auth_parse_options() - markus@cvs.openbsd.org 2001/01/20 17:59:40 GMT 2001 [readconf.c] fix SIGSEGV from -o ""; problem noted by jehsom@togetherweb.com - stevesk@cvs.openbsd.org 2001/01/20 18:20:29 [sshconnect2.c] dh_new_group() does not return NULL. ok markus@ - markus@cvs.openbsd.org 2001/01/20 21:33:42 [ssh-add.c] do not loop forever if askpass does not exist; from andrew@pimlott.ne.mediaone.net - djm@cvs.openbsd.org 2001/01/20 23:00:56 [servconf.c] Check for NULL return from strdelim; ok markus - djm@cvs.openbsd.org 2001/01/20 23:02:07 [readconf.c] KNF; ok markus - jakob@cvs.openbsd.org 2001/01/21 9:00:33 [ssh-keygen.1] remove -R flag; ok markus@ - markus@cvs.openbsd.org 2001/01/21 19:05:40 [atomicio.c automicio.h auth-chall.c auth-krb4.c auth-options.c auth-options.h auth-passwd.c auth-rh-rsa.c auth-rhosts.c auth-rsa.c auth.c auth.h auth1.c auth2-chall.c auth2.c authfd.c authfile.c bufaux.c bufaux.h buffer.c canahost.c canahost.h channels.c cipher.c cli.c clientloop.c clientloop.h compat.c compress.c deattack.c dh.c dispatch.c groupaccess.c hmac.c hostfile.c kex.c key.c key.h log-client.c log-server.c log.c log.h login.c login.h match.c misc.c misc.h nchan.c packet.c pty.c radix.h readconf.c readpass.c readpass.h rsa.c scp.c servconf.c serverloop.c serverloop.h session.c sftp-server.c ssh-add.c ssh-agent.c ssh-dss.c ssh-keygen.c ssh-keyscan.c ssh-rsa.c ssh.c ssh.h sshconnect.c sshconnect.h sshconnect1.c sshconnect2.c sshd.c tildexpand.c tildexpand.h ttysmodes.c uidswap.c xmalloc.c] split ssh.h and try to cleanup the #include mess. remove unnecessary #includes. rename util.[ch] -> misc.[ch] - (bal) renamed 'PIDDIR' to '_PATH_SSH_PIDDIR' to match OpenBSD tree - (bal) Moved #ifdef KRB4 in auth-krb4.c above the #include to resolve conflict when compiling for non-kerb install - (bal) removed the #ifdef SKEY in auth1.c to match Markus' changes on 1/19.
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#include <openssl/rsa.h>
#include <openssl/md5.h>
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#include "rsa.h"
#include "packet.h"
#include "xmalloc.h"
Hopefully things did not get mixed around too much. It compiles under Linux and works. So that is at least a good sign. =) 20010122 - (bal) OpenBSD Resync - markus@cvs.openbsd.org 2001/01/19 12:45:26 GMT 2001 by markus [servconf.c ssh.h sshd.c] only auth-chall.c needs #ifdef SKEY - markus@cvs.openbsd.org 2001/01/19 15:55:10 GMT 2001 by markus [auth-krb4.c auth-options.c auth-rh-rsa.c auth-rhosts.c auth-rsa.c auth1.c auth2.c channels.c clientloop.c dh.c dispatch.c nchan.c packet.c pathname.h readconf.c scp.c servconf.c serverloop.c session.c ssh-add.c ssh-keygen.c ssh-keyscan.c ssh.c ssh.h ssh1.h sshconnect1.c sshd.c ttymodes.c] move ssh1 definitions to ssh1.h, pathnames to pathnames.h - markus@cvs.openbsd.org 2001/01/19 16:48:14 [sshd.8] fix typo; from stevesk@ - markus@cvs.openbsd.org 2001/01/19 16:50:58 [ssh-dss.c] clear and free digest, make consistent with other code (use dlen); from stevesk@ - markus@cvs.openbsd.org 2001/01/20 15:55:20 GMT 2001 by markus [auth-options.c auth-options.h auth-rsa.c auth2.c] pass the filename to auth_parse_options() - markus@cvs.openbsd.org 2001/01/20 17:59:40 GMT 2001 [readconf.c] fix SIGSEGV from -o ""; problem noted by jehsom@togetherweb.com - stevesk@cvs.openbsd.org 2001/01/20 18:20:29 [sshconnect2.c] dh_new_group() does not return NULL. ok markus@ - markus@cvs.openbsd.org 2001/01/20 21:33:42 [ssh-add.c] do not loop forever if askpass does not exist; from andrew@pimlott.ne.mediaone.net - djm@cvs.openbsd.org 2001/01/20 23:00:56 [servconf.c] Check for NULL return from strdelim; ok markus - djm@cvs.openbsd.org 2001/01/20 23:02:07 [readconf.c] KNF; ok markus - jakob@cvs.openbsd.org 2001/01/21 9:00:33 [ssh-keygen.1] remove -R flag; ok markus@ - markus@cvs.openbsd.org 2001/01/21 19:05:40 [atomicio.c automicio.h auth-chall.c auth-krb4.c auth-options.c auth-options.h auth-passwd.c auth-rh-rsa.c auth-rhosts.c auth-rsa.c auth.c auth.h auth1.c auth2-chall.c auth2.c authfd.c authfile.c bufaux.c bufaux.h buffer.c canahost.c canahost.h channels.c cipher.c cli.c clientloop.c clientloop.h compat.c compress.c deattack.c dh.c dispatch.c groupaccess.c hmac.c hostfile.c kex.c key.c key.h log-client.c log-server.c log.c log.h login.c login.h match.c misc.c misc.h nchan.c packet.c pty.c radix.h readconf.c readpass.c readpass.h rsa.c scp.c servconf.c serverloop.c serverloop.h session.c sftp-server.c ssh-add.c ssh-agent.c ssh-dss.c ssh-keygen.c ssh-keyscan.c ssh-rsa.c ssh.c ssh.h sshconnect.c sshconnect.h sshconnect1.c sshconnect2.c sshd.c tildexpand.c tildexpand.h ttysmodes.c uidswap.c xmalloc.c] split ssh.h and try to cleanup the #include mess. remove unnecessary #includes. rename util.[ch] -> misc.[ch] - (bal) renamed 'PIDDIR' to '_PATH_SSH_PIDDIR' to match OpenBSD tree - (bal) Moved #ifdef KRB4 in auth-krb4.c above the #include to resolve conflict when compiling for non-kerb install - (bal) removed the #ifdef SKEY in auth1.c to match Markus' changes on 1/19.
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#include "ssh1.h"
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#include "mpaux.h"
#include "uidswap.h"
#include "match.h"
#include "auth-options.h"
Hopefully things did not get mixed around too much. It compiles under Linux and works. So that is at least a good sign. =) 20010122 - (bal) OpenBSD Resync - markus@cvs.openbsd.org 2001/01/19 12:45:26 GMT 2001 by markus [servconf.c ssh.h sshd.c] only auth-chall.c needs #ifdef SKEY - markus@cvs.openbsd.org 2001/01/19 15:55:10 GMT 2001 by markus [auth-krb4.c auth-options.c auth-rh-rsa.c auth-rhosts.c auth-rsa.c auth1.c auth2.c channels.c clientloop.c dh.c dispatch.c nchan.c packet.c pathname.h readconf.c scp.c servconf.c serverloop.c session.c ssh-add.c ssh-keygen.c ssh-keyscan.c ssh.c ssh.h ssh1.h sshconnect1.c sshd.c ttymodes.c] move ssh1 definitions to ssh1.h, pathnames to pathnames.h - markus@cvs.openbsd.org 2001/01/19 16:48:14 [sshd.8] fix typo; from stevesk@ - markus@cvs.openbsd.org 2001/01/19 16:50:58 [ssh-dss.c] clear and free digest, make consistent with other code (use dlen); from stevesk@ - markus@cvs.openbsd.org 2001/01/20 15:55:20 GMT 2001 by markus [auth-options.c auth-options.h auth-rsa.c auth2.c] pass the filename to auth_parse_options() - markus@cvs.openbsd.org 2001/01/20 17:59:40 GMT 2001 [readconf.c] fix SIGSEGV from -o ""; problem noted by jehsom@togetherweb.com - stevesk@cvs.openbsd.org 2001/01/20 18:20:29 [sshconnect2.c] dh_new_group() does not return NULL. ok markus@ - markus@cvs.openbsd.org 2001/01/20 21:33:42 [ssh-add.c] do not loop forever if askpass does not exist; from andrew@pimlott.ne.mediaone.net - djm@cvs.openbsd.org 2001/01/20 23:00:56 [servconf.c] Check for NULL return from strdelim; ok markus - djm@cvs.openbsd.org 2001/01/20 23:02:07 [readconf.c] KNF; ok markus - jakob@cvs.openbsd.org 2001/01/21 9:00:33 [ssh-keygen.1] remove -R flag; ok markus@ - markus@cvs.openbsd.org 2001/01/21 19:05:40 [atomicio.c automicio.h auth-chall.c auth-krb4.c auth-options.c auth-options.h auth-passwd.c auth-rh-rsa.c auth-rhosts.c auth-rsa.c auth.c auth.h auth1.c auth2-chall.c auth2.c authfd.c authfile.c bufaux.c bufaux.h buffer.c canahost.c canahost.h channels.c cipher.c cli.c clientloop.c clientloop.h compat.c compress.c deattack.c dh.c dispatch.c groupaccess.c hmac.c hostfile.c kex.c key.c key.h log-client.c log-server.c log.c log.h login.c login.h match.c misc.c misc.h nchan.c packet.c pty.c radix.h readconf.c readpass.c readpass.h rsa.c scp.c servconf.c serverloop.c serverloop.h session.c sftp-server.c ssh-add.c ssh-agent.c ssh-dss.c ssh-keygen.c ssh-keyscan.c ssh-rsa.c ssh.c ssh.h sshconnect.c sshconnect.h sshconnect1.c sshconnect2.c sshd.c tildexpand.c tildexpand.h ttysmodes.c uidswap.c xmalloc.c] split ssh.h and try to cleanup the #include mess. remove unnecessary #includes. rename util.[ch] -> misc.[ch] - (bal) renamed 'PIDDIR' to '_PATH_SSH_PIDDIR' to match OpenBSD tree - (bal) Moved #ifdef KRB4 in auth-krb4.c above the #include to resolve conflict when compiling for non-kerb install - (bal) removed the #ifdef SKEY in auth1.c to match Markus' changes on 1/19.
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#include "pathnames.h"
#include "log.h"
#include "servconf.h"
#include "auth.h"
#include "hostfile.h"
#include "monitor_wrap.h"
- (djm) Big OpenBSD sync: - markus@cvs.openbsd.org 2000/09/30 10:27:44 [log.c] allow loglevel debug - markus@cvs.openbsd.org 2000/10/03 11:59:57 [packet.c] hmac->mac - markus@cvs.openbsd.org 2000/10/03 12:03:03 [auth-krb4.c auth-passwd.c auth-rh-rsa.c auth-rhosts.c auth-rsa.c auth1.c] move fake-auth from auth1.c to individual auth methods, disables s/key in debug-msg - markus@cvs.openbsd.org 2000/10/03 12:16:48 ssh.c do not resolve canonname, i have no idea why this was added oin ossh - markus@cvs.openbsd.org 2000/10/09 15:30:44 ssh-keygen.1 ssh-keygen.c -X now reads private ssh.com DSA keys, too. - markus@cvs.openbsd.org 2000/10/09 15:32:34 auth-options.c clear options on every call. - markus@cvs.openbsd.org 2000/10/09 15:51:00 authfd.c authfd.h interop with ssh-agent2, from <res@shore.net> - markus@cvs.openbsd.org 2000/10/10 14:20:45 compat.c use rexexp for version string matching - provos@cvs.openbsd.org 2000/10/10 22:02:18 [kex.c kex.h myproposal.h ssh.h ssh2.h sshconnect2.c sshd.c dh.c dh.h] First rough implementation of the diffie-hellman group exchange. The client can ask the server for bigger groups to perform the diffie-hellman in, thus increasing the attack complexity when using ciphers with longer keys. University of Windsor provided network, T the company. - markus@cvs.openbsd.org 2000/10/11 13:59:52 [auth-rsa.c auth2.c] clear auth options unless auth sucessfull - markus@cvs.openbsd.org 2000/10/11 14:00:27 [auth-options.h] clear auth options unless auth sucessfull - markus@cvs.openbsd.org 2000/10/11 14:03:27 [scp.1 scp.c] support 'scp -o' with help from mouring@pconline.com - markus@cvs.openbsd.org 2000/10/11 14:11:35 [dh.c] Wall - markus@cvs.openbsd.org 2000/10/11 14:14:40 [auth.h auth2.c readconf.c readconf.h readpass.c servconf.c servconf.h] [ssh.h sshconnect2.c sshd_config auth2-skey.c cli.c cli.h] add support for s/key (kbd-interactive) to ssh2, based on work by mkiernan@avantgo.com and me - markus@cvs.openbsd.org 2000/10/11 14:27:24 [auth.c auth1.c auth2.c authfile.c cipher.c cipher.h kex.c kex.h] [myproposal.h packet.c readconf.c session.c ssh.c ssh.h sshconnect1.c] [sshconnect2.c sshd.c] new cipher framework - markus@cvs.openbsd.org 2000/10/11 14:45:21 [cipher.c] remove DES - markus@cvs.openbsd.org 2000/10/12 03:59:20 [cipher.c cipher.h sshconnect1.c sshconnect2.c sshd.c] enable DES in SSH-1 clients only - markus@cvs.openbsd.org 2000/10/12 08:21:13 [kex.h packet.c] remove unused - markus@cvs.openbsd.org 2000/10/13 12:34:46 [sshd.c] Kludge for F-Secure Macintosh < 1.0.2; appro@fy.chalmers.se - markus@cvs.openbsd.org 2000/10/13 12:59:15 [cipher.c cipher.h myproposal.h rijndael.c rijndael.h] rijndael/aes support - markus@cvs.openbsd.org 2000/10/13 13:10:54 [sshd.8] more info about -V - markus@cvs.openbsd.org 2000/10/13 13:12:02 [myproposal.h] prefer no compression
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/* import */
extern ServerOptions options;
/*
* Session identifier that is used to bind key exchange and authentication
* responses to a particular session.
*/
extern u_char session_id[16];
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/*
* The .ssh/authorized_keys file contains public keys, one per line, in the
* following format:
* options bits e n comment
* where bits, e and n are decimal numbers,
* and comment is any string of characters up to newline. The maximum
* length of a line is 8000 characters. See the documentation for a
* description of the options.
*/
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BIGNUM *
auth_rsa_generate_challenge(Key *key)
{
BIGNUM *challenge;
BN_CTX *ctx;
if ((challenge = BN_new()) == NULL)
fatal("auth_rsa_generate_challenge: BN_new() failed");
/* Generate a random challenge. */
BN_rand(challenge, 256, 0, 0);
if ((ctx = BN_CTX_new()) == NULL)
fatal("auth_rsa_generate_challenge: BN_CTX_new() failed");
BN_mod(challenge, challenge, key->rsa->n, ctx);
BN_CTX_free(ctx);
return challenge;
}
int
auth_rsa_verify_response(Key *key, BIGNUM *challenge, u_char response[16])
{
u_char buf[32], mdbuf[16];
MD5_CTX md;
int len;
/* The response is MD5 of decrypted challenge plus session id. */
len = BN_num_bytes(challenge);
if (len <= 0 || len > 32)
fatal("auth_rsa_verify_response: bad challenge length %d", len);
memset(buf, 0, 32);
BN_bn2bin(challenge, buf + 32 - len);
MD5_Init(&md);
MD5_Update(&md, buf, 32);
MD5_Update(&md, session_id, 16);
MD5_Final(mdbuf, &md);
/* Verify that the response is the original challenge. */
if (memcmp(response, mdbuf, 16) != 0) {
/* Wrong answer. */
return (0);
}
/* Correct answer. */
return (1);
}
/*
* Performs the RSA authentication challenge-response dialog with the client,
* and returns true (non-zero) if the client gave the correct answer to
* our challenge; returns zero if the client gives a wrong answer.
*/
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int
auth_rsa_challenge_dialog(Key *key)
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{
- OpenBSD CVS updates to v1.2.3 [ssh.h atomicio.c] - int atomicio -> ssize_t (for alpha). ok deraadt@ [auth-rsa.c] - delay MD5 computation until client sends response, free() early, cleanup. [cipher.c] - void* -> unsigned char*, ok niels@ [hostfile.c] - remove unused variable 'len'. fix comments. - remove unused variable [log-client.c log-server.c] - rename a cpp symbol, to avoid param.h collision [packet.c] - missing xfree() - getsockname() requires initialized tolen; andy@guildsoftware.com - use getpeername() in packet_connection_is_on_socket(), fixes sshd -i; from Holger.Trapp@Informatik.TU-Chemnitz.DE [pty.c pty.h] - register cleanup for pty earlier. move code for pty-owner handling to pty.c ok provos@, dugsong@ [readconf.c] - turn off x11-fwd for the client, too. [rsa.c] - PKCS#1 padding [scp.c] - allow '.' in usernames; from jedgar@fxp.org [servconf.c] - typo: ignore_user_known_hosts int->flag; naddy@mips.rhein-neckar.de - sync with sshd_config [ssh-keygen.c] - enable ssh-keygen -l -f ~/.ssh/known_hosts, ok deraadt@ [ssh.1] - Change invalid 'CHAT' loglevel to 'VERBOSE' [ssh.c] - suppress AAAA query host when '-4' is used; from shin@nd.net.fujitsu.co.jp - turn off x11-fwd for the client, too. [sshconnect.c] - missing xfree() - retry rresvport_af(), too. from sumikawa@ebina.hitachi.co.jp. - read error vs. "Connection closed by remote host" [sshd.8] - ie. -> i.e., - do not link to a commercial page.. - sync with sshd_config [sshd.c] - no need for poll.h; from bright@wintelcom.net - log with level log() not fatal() if peer behaves badly. - don't panic if client behaves strange. ok deraadt@ - make no-port-forwarding for RSA keys deny both -L and -R style fwding - delay close() of pty until the pty has been chowned back to root - oops, fix comment, too. - missing xfree() - move XAUTHORITY to subdir. ok dugsong@. fixes debian bug #57907, too. (http://cgi.debian.org/cgi-bin/bugreport.cgi?archive=no&bug=57907) - register cleanup for pty earlier. move code for pty-owner handling to pty.c ok provos@, dugsong@ - create x11 cookie file - fix pr 1113, fclose() -> pclose(), todo: remote popen() - version 1.2.3 - Cleaned up
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BIGNUM *challenge, *encrypted_challenge;
u_char response[16];
int i, success;
if ((encrypted_challenge = BN_new()) == NULL)
fatal("auth_rsa_challenge_dialog: BN_new() failed");
challenge = PRIVSEP(auth_rsa_generate_challenge(key));
/* Encrypt the challenge with the public key. */
rsa_public_encrypt(encrypted_challenge, challenge, key->rsa);
/* Send the encrypted challenge to the client. */
packet_start(SSH_SMSG_AUTH_RSA_CHALLENGE);
packet_put_bignum(encrypted_challenge);
packet_send();
- OpenBSD CVS updates to v1.2.3 [ssh.h atomicio.c] - int atomicio -> ssize_t (for alpha). ok deraadt@ [auth-rsa.c] - delay MD5 computation until client sends response, free() early, cleanup. [cipher.c] - void* -> unsigned char*, ok niels@ [hostfile.c] - remove unused variable 'len'. fix comments. - remove unused variable [log-client.c log-server.c] - rename a cpp symbol, to avoid param.h collision [packet.c] - missing xfree() - getsockname() requires initialized tolen; andy@guildsoftware.com - use getpeername() in packet_connection_is_on_socket(), fixes sshd -i; from Holger.Trapp@Informatik.TU-Chemnitz.DE [pty.c pty.h] - register cleanup for pty earlier. move code for pty-owner handling to pty.c ok provos@, dugsong@ [readconf.c] - turn off x11-fwd for the client, too. [rsa.c] - PKCS#1 padding [scp.c] - allow '.' in usernames; from jedgar@fxp.org [servconf.c] - typo: ignore_user_known_hosts int->flag; naddy@mips.rhein-neckar.de - sync with sshd_config [ssh-keygen.c] - enable ssh-keygen -l -f ~/.ssh/known_hosts, ok deraadt@ [ssh.1] - Change invalid 'CHAT' loglevel to 'VERBOSE' [ssh.c] - suppress AAAA query host when '-4' is used; from shin@nd.net.fujitsu.co.jp - turn off x11-fwd for the client, too. [sshconnect.c] - missing xfree() - retry rresvport_af(), too. from sumikawa@ebina.hitachi.co.jp. - read error vs. "Connection closed by remote host" [sshd.8] - ie. -> i.e., - do not link to a commercial page.. - sync with sshd_config [sshd.c] - no need for poll.h; from bright@wintelcom.net - log with level log() not fatal() if peer behaves badly. - don't panic if client behaves strange. ok deraadt@ - make no-port-forwarding for RSA keys deny both -L and -R style fwding - delay close() of pty until the pty has been chowned back to root - oops, fix comment, too. - missing xfree() - move XAUTHORITY to subdir. ok dugsong@. fixes debian bug #57907, too. (http://cgi.debian.org/cgi-bin/bugreport.cgi?archive=no&bug=57907) - register cleanup for pty earlier. move code for pty-owner handling to pty.c ok provos@, dugsong@ - create x11 cookie file - fix pr 1113, fclose() -> pclose(), todo: remote popen() - version 1.2.3 - Cleaned up
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BN_clear_free(encrypted_challenge);
packet_write_wait();
- OpenBSD CVS updates to v1.2.3 [ssh.h atomicio.c] - int atomicio -> ssize_t (for alpha). ok deraadt@ [auth-rsa.c] - delay MD5 computation until client sends response, free() early, cleanup. [cipher.c] - void* -> unsigned char*, ok niels@ [hostfile.c] - remove unused variable 'len'. fix comments. - remove unused variable [log-client.c log-server.c] - rename a cpp symbol, to avoid param.h collision [packet.c] - missing xfree() - getsockname() requires initialized tolen; andy@guildsoftware.com - use getpeername() in packet_connection_is_on_socket(), fixes sshd -i; from Holger.Trapp@Informatik.TU-Chemnitz.DE [pty.c pty.h] - register cleanup for pty earlier. move code for pty-owner handling to pty.c ok provos@, dugsong@ [readconf.c] - turn off x11-fwd for the client, too. [rsa.c] - PKCS#1 padding [scp.c] - allow '.' in usernames; from jedgar@fxp.org [servconf.c] - typo: ignore_user_known_hosts int->flag; naddy@mips.rhein-neckar.de - sync with sshd_config [ssh-keygen.c] - enable ssh-keygen -l -f ~/.ssh/known_hosts, ok deraadt@ [ssh.1] - Change invalid 'CHAT' loglevel to 'VERBOSE' [ssh.c] - suppress AAAA query host when '-4' is used; from shin@nd.net.fujitsu.co.jp - turn off x11-fwd for the client, too. [sshconnect.c] - missing xfree() - retry rresvport_af(), too. from sumikawa@ebina.hitachi.co.jp. - read error vs. "Connection closed by remote host" [sshd.8] - ie. -> i.e., - do not link to a commercial page.. - sync with sshd_config [sshd.c] - no need for poll.h; from bright@wintelcom.net - log with level log() not fatal() if peer behaves badly. - don't panic if client behaves strange. ok deraadt@ - make no-port-forwarding for RSA keys deny both -L and -R style fwding - delay close() of pty until the pty has been chowned back to root - oops, fix comment, too. - missing xfree() - move XAUTHORITY to subdir. ok dugsong@. fixes debian bug #57907, too. (http://cgi.debian.org/cgi-bin/bugreport.cgi?archive=no&bug=57907) - register cleanup for pty earlier. move code for pty-owner handling to pty.c ok provos@, dugsong@ - create x11 cookie file - fix pr 1113, fclose() -> pclose(), todo: remote popen() - version 1.2.3 - Cleaned up
2000-03-09 10:27:49 +00:00
/* Wait for a response. */
packet_read_expect(SSH_CMSG_AUTH_RSA_RESPONSE);
- OpenBSD CVS updates to v1.2.3 [ssh.h atomicio.c] - int atomicio -> ssize_t (for alpha). ok deraadt@ [auth-rsa.c] - delay MD5 computation until client sends response, free() early, cleanup. [cipher.c] - void* -> unsigned char*, ok niels@ [hostfile.c] - remove unused variable 'len'. fix comments. - remove unused variable [log-client.c log-server.c] - rename a cpp symbol, to avoid param.h collision [packet.c] - missing xfree() - getsockname() requires initialized tolen; andy@guildsoftware.com - use getpeername() in packet_connection_is_on_socket(), fixes sshd -i; from Holger.Trapp@Informatik.TU-Chemnitz.DE [pty.c pty.h] - register cleanup for pty earlier. move code for pty-owner handling to pty.c ok provos@, dugsong@ [readconf.c] - turn off x11-fwd for the client, too. [rsa.c] - PKCS#1 padding [scp.c] - allow '.' in usernames; from jedgar@fxp.org [servconf.c] - typo: ignore_user_known_hosts int->flag; naddy@mips.rhein-neckar.de - sync with sshd_config [ssh-keygen.c] - enable ssh-keygen -l -f ~/.ssh/known_hosts, ok deraadt@ [ssh.1] - Change invalid 'CHAT' loglevel to 'VERBOSE' [ssh.c] - suppress AAAA query host when '-4' is used; from shin@nd.net.fujitsu.co.jp - turn off x11-fwd for the client, too. [sshconnect.c] - missing xfree() - retry rresvport_af(), too. from sumikawa@ebina.hitachi.co.jp. - read error vs. "Connection closed by remote host" [sshd.8] - ie. -> i.e., - do not link to a commercial page.. - sync with sshd_config [sshd.c] - no need for poll.h; from bright@wintelcom.net - log with level log() not fatal() if peer behaves badly. - don't panic if client behaves strange. ok deraadt@ - make no-port-forwarding for RSA keys deny both -L and -R style fwding - delay close() of pty until the pty has been chowned back to root - oops, fix comment, too. - missing xfree() - move XAUTHORITY to subdir. ok dugsong@. fixes debian bug #57907, too. (http://cgi.debian.org/cgi-bin/bugreport.cgi?archive=no&bug=57907) - register cleanup for pty earlier. move code for pty-owner handling to pty.c ok provos@, dugsong@ - create x11 cookie file - fix pr 1113, fclose() -> pclose(), todo: remote popen() - version 1.2.3 - Cleaned up
2000-03-09 10:27:49 +00:00
for (i = 0; i < 16; i++)
response[i] = packet_get_char();
packet_check_eom();
- OpenBSD CVS updates to v1.2.3 [ssh.h atomicio.c] - int atomicio -> ssize_t (for alpha). ok deraadt@ [auth-rsa.c] - delay MD5 computation until client sends response, free() early, cleanup. [cipher.c] - void* -> unsigned char*, ok niels@ [hostfile.c] - remove unused variable 'len'. fix comments. - remove unused variable [log-client.c log-server.c] - rename a cpp symbol, to avoid param.h collision [packet.c] - missing xfree() - getsockname() requires initialized tolen; andy@guildsoftware.com - use getpeername() in packet_connection_is_on_socket(), fixes sshd -i; from Holger.Trapp@Informatik.TU-Chemnitz.DE [pty.c pty.h] - register cleanup for pty earlier. move code for pty-owner handling to pty.c ok provos@, dugsong@ [readconf.c] - turn off x11-fwd for the client, too. [rsa.c] - PKCS#1 padding [scp.c] - allow '.' in usernames; from jedgar@fxp.org [servconf.c] - typo: ignore_user_known_hosts int->flag; naddy@mips.rhein-neckar.de - sync with sshd_config [ssh-keygen.c] - enable ssh-keygen -l -f ~/.ssh/known_hosts, ok deraadt@ [ssh.1] - Change invalid 'CHAT' loglevel to 'VERBOSE' [ssh.c] - suppress AAAA query host when '-4' is used; from shin@nd.net.fujitsu.co.jp - turn off x11-fwd for the client, too. [sshconnect.c] - missing xfree() - retry rresvport_af(), too. from sumikawa@ebina.hitachi.co.jp. - read error vs. "Connection closed by remote host" [sshd.8] - ie. -> i.e., - do not link to a commercial page.. - sync with sshd_config [sshd.c] - no need for poll.h; from bright@wintelcom.net - log with level log() not fatal() if peer behaves badly. - don't panic if client behaves strange. ok deraadt@ - make no-port-forwarding for RSA keys deny both -L and -R style fwding - delay close() of pty until the pty has been chowned back to root - oops, fix comment, too. - missing xfree() - move XAUTHORITY to subdir. ok dugsong@. fixes debian bug #57907, too. (http://cgi.debian.org/cgi-bin/bugreport.cgi?archive=no&bug=57907) - register cleanup for pty earlier. move code for pty-owner handling to pty.c ok provos@, dugsong@ - create x11 cookie file - fix pr 1113, fclose() -> pclose(), todo: remote popen() - version 1.2.3 - Cleaned up
2000-03-09 10:27:49 +00:00
success = PRIVSEP(auth_rsa_verify_response(key, challenge, response));
BN_clear_free(challenge);
return (success);
1999-10-27 03:42:43 +00:00
}
/*
* check if there's user key matching client_n,
* return key if login is allowed, NULL otherwise
*/
1999-10-27 03:42:43 +00:00
int
auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
1999-10-27 03:42:43 +00:00
{
char line[8192], *file;
int allowed = 0;
u_int bits;
FILE *f;
u_long linenum = 0;
struct stat st;
Key *key;
- (djm) Big OpenBSD sync: - markus@cvs.openbsd.org 2000/09/30 10:27:44 [log.c] allow loglevel debug - markus@cvs.openbsd.org 2000/10/03 11:59:57 [packet.c] hmac->mac - markus@cvs.openbsd.org 2000/10/03 12:03:03 [auth-krb4.c auth-passwd.c auth-rh-rsa.c auth-rhosts.c auth-rsa.c auth1.c] move fake-auth from auth1.c to individual auth methods, disables s/key in debug-msg - markus@cvs.openbsd.org 2000/10/03 12:16:48 ssh.c do not resolve canonname, i have no idea why this was added oin ossh - markus@cvs.openbsd.org 2000/10/09 15:30:44 ssh-keygen.1 ssh-keygen.c -X now reads private ssh.com DSA keys, too. - markus@cvs.openbsd.org 2000/10/09 15:32:34 auth-options.c clear options on every call. - markus@cvs.openbsd.org 2000/10/09 15:51:00 authfd.c authfd.h interop with ssh-agent2, from <res@shore.net> - markus@cvs.openbsd.org 2000/10/10 14:20:45 compat.c use rexexp for version string matching - provos@cvs.openbsd.org 2000/10/10 22:02:18 [kex.c kex.h myproposal.h ssh.h ssh2.h sshconnect2.c sshd.c dh.c dh.h] First rough implementation of the diffie-hellman group exchange. The client can ask the server for bigger groups to perform the diffie-hellman in, thus increasing the attack complexity when using ciphers with longer keys. University of Windsor provided network, T the company. - markus@cvs.openbsd.org 2000/10/11 13:59:52 [auth-rsa.c auth2.c] clear auth options unless auth sucessfull - markus@cvs.openbsd.org 2000/10/11 14:00:27 [auth-options.h] clear auth options unless auth sucessfull - markus@cvs.openbsd.org 2000/10/11 14:03:27 [scp.1 scp.c] support 'scp -o' with help from mouring@pconline.com - markus@cvs.openbsd.org 2000/10/11 14:11:35 [dh.c] Wall - markus@cvs.openbsd.org 2000/10/11 14:14:40 [auth.h auth2.c readconf.c readconf.h readpass.c servconf.c servconf.h] [ssh.h sshconnect2.c sshd_config auth2-skey.c cli.c cli.h] add support for s/key (kbd-interactive) to ssh2, based on work by mkiernan@avantgo.com and me - markus@cvs.openbsd.org 2000/10/11 14:27:24 [auth.c auth1.c auth2.c authfile.c cipher.c cipher.h kex.c kex.h] [myproposal.h packet.c readconf.c session.c ssh.c ssh.h sshconnect1.c] [sshconnect2.c sshd.c] new cipher framework - markus@cvs.openbsd.org 2000/10/11 14:45:21 [cipher.c] remove DES - markus@cvs.openbsd.org 2000/10/12 03:59:20 [cipher.c cipher.h sshconnect1.c sshconnect2.c sshd.c] enable DES in SSH-1 clients only - markus@cvs.openbsd.org 2000/10/12 08:21:13 [kex.h packet.c] remove unused - markus@cvs.openbsd.org 2000/10/13 12:34:46 [sshd.c] Kludge for F-Secure Macintosh < 1.0.2; appro@fy.chalmers.se - markus@cvs.openbsd.org 2000/10/13 12:59:15 [cipher.c cipher.h myproposal.h rijndael.c rijndael.h] rijndael/aes support - markus@cvs.openbsd.org 2000/10/13 13:10:54 [sshd.8] more info about -V - markus@cvs.openbsd.org 2000/10/13 13:12:02 [myproposal.h] prefer no compression
2000-10-14 05:23:11 +00:00
/* Temporarily use the user's uid. */
temporarily_use_uid(pw);
/* The authorized keys. */
file = authorized_keys_file(pw);
debug("trying public RSA key file %s", file);
/* Fail quietly if file does not exist */
if (stat(file, &st) < 0) {
/* Restore the privileged uid. */
restore_uid();
xfree(file);
return (NULL);
1999-10-27 03:42:43 +00:00
}
/* Open the file containing the authorized keys. */
f = fopen(file, "r");
if (!f) {
/* Restore the privileged uid. */
restore_uid();
xfree(file);
return (NULL);
1999-10-27 03:42:43 +00:00
}
if (options.strict_modes &&
secure_filename(f, file, pw, line, sizeof(line)) != 0) {
xfree(file);
fclose(f);
log("Authentication refused: %s", line);
restore_uid();
return (NULL);
}
/* Flag indicating whether the key is allowed. */
allowed = 0;
key = key_new(KEY_RSA1);
/*
* Go though the accepted keys, looking for the current key. If
* found, perform a challenge-response dialog to verify that the
* user really has the corresponding private key.
*/
while (fgets(line, sizeof(line), f)) {
char *cp;
char *options;
linenum++;
/* Skip leading whitespace, empty and comment lines. */
for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
;
if (!*cp || *cp == '\n' || *cp == '#')
continue;
/*
* Check if there are options for this key, and if so,
* save their starting address and skip the option part
* for now. If there are no options, set the starting
* address to NULL.
*/
if (*cp < '0' || *cp > '9') {
int quoted = 0;
options = cp;
for (; *cp && (quoted || (*cp != ' ' && *cp != '\t')); cp++) {
if (*cp == '\\' && cp[1] == '"')
cp++; /* Skip both */
else if (*cp == '"')
quoted = !quoted;
1999-10-27 03:42:43 +00:00
}
} else
options = NULL;
/* Parse the key from the line. */
if (hostfile_read_key(&cp, &bits, key) == 0) {
debug("%.100s, line %lu: non ssh1 key syntax",
Hopefully things did not get mixed around too much. It compiles under Linux and works. So that is at least a good sign. =) 20010122 - (bal) OpenBSD Resync - markus@cvs.openbsd.org 2001/01/19 12:45:26 GMT 2001 by markus [servconf.c ssh.h sshd.c] only auth-chall.c needs #ifdef SKEY - markus@cvs.openbsd.org 2001/01/19 15:55:10 GMT 2001 by markus [auth-krb4.c auth-options.c auth-rh-rsa.c auth-rhosts.c auth-rsa.c auth1.c auth2.c channels.c clientloop.c dh.c dispatch.c nchan.c packet.c pathname.h readconf.c scp.c servconf.c serverloop.c session.c ssh-add.c ssh-keygen.c ssh-keyscan.c ssh.c ssh.h ssh1.h sshconnect1.c sshd.c ttymodes.c] move ssh1 definitions to ssh1.h, pathnames to pathnames.h - markus@cvs.openbsd.org 2001/01/19 16:48:14 [sshd.8] fix typo; from stevesk@ - markus@cvs.openbsd.org 2001/01/19 16:50:58 [ssh-dss.c] clear and free digest, make consistent with other code (use dlen); from stevesk@ - markus@cvs.openbsd.org 2001/01/20 15:55:20 GMT 2001 by markus [auth-options.c auth-options.h auth-rsa.c auth2.c] pass the filename to auth_parse_options() - markus@cvs.openbsd.org 2001/01/20 17:59:40 GMT 2001 [readconf.c] fix SIGSEGV from -o ""; problem noted by jehsom@togetherweb.com - stevesk@cvs.openbsd.org 2001/01/20 18:20:29 [sshconnect2.c] dh_new_group() does not return NULL. ok markus@ - markus@cvs.openbsd.org 2001/01/20 21:33:42 [ssh-add.c] do not loop forever if askpass does not exist; from andrew@pimlott.ne.mediaone.net - djm@cvs.openbsd.org 2001/01/20 23:00:56 [servconf.c] Check for NULL return from strdelim; ok markus - djm@cvs.openbsd.org 2001/01/20 23:02:07 [readconf.c] KNF; ok markus - jakob@cvs.openbsd.org 2001/01/21 9:00:33 [ssh-keygen.1] remove -R flag; ok markus@ - markus@cvs.openbsd.org 2001/01/21 19:05:40 [atomicio.c automicio.h auth-chall.c auth-krb4.c auth-options.c auth-options.h auth-passwd.c auth-rh-rsa.c auth-rhosts.c auth-rsa.c auth.c auth.h auth1.c auth2-chall.c auth2.c authfd.c authfile.c bufaux.c bufaux.h buffer.c canahost.c canahost.h channels.c cipher.c cli.c clientloop.c clientloop.h compat.c compress.c deattack.c dh.c dispatch.c groupaccess.c hmac.c hostfile.c kex.c key.c key.h log-client.c log-server.c log.c log.h login.c login.h match.c misc.c misc.h nchan.c packet.c pty.c radix.h readconf.c readpass.c readpass.h rsa.c scp.c servconf.c serverloop.c serverloop.h session.c sftp-server.c ssh-add.c ssh-agent.c ssh-dss.c ssh-keygen.c ssh-keyscan.c ssh-rsa.c ssh.c ssh.h sshconnect.c sshconnect.h sshconnect1.c sshconnect2.c sshd.c tildexpand.c tildexpand.h ttysmodes.c uidswap.c xmalloc.c] split ssh.h and try to cleanup the #include mess. remove unnecessary #includes. rename util.[ch] -> misc.[ch] - (bal) renamed 'PIDDIR' to '_PATH_SSH_PIDDIR' to match OpenBSD tree - (bal) Moved #ifdef KRB4 in auth-krb4.c above the #include to resolve conflict when compiling for non-kerb install - (bal) removed the #ifdef SKEY in auth1.c to match Markus' changes on 1/19.
2001-01-22 05:34:40 +00:00
file, linenum);
continue;
1999-10-27 03:42:43 +00:00
}
/* cp now points to the comment part. */
/* Check if the we have found the desired key (identified by its modulus). */
if (BN_cmp(key->rsa->n, client_n) != 0)
continue;
/* check the real bits */
if (bits != BN_num_bits(key->rsa->n))
log("Warning: %s, line %lu: keysize mismatch: "
"actual %d vs. announced %d.",
file, linenum, BN_num_bits(key->rsa->n), bits);
/* We have found the desired key. */
/*
* If our options do not allow this key to be used,
* do not send challenge.
*/
Hopefully things did not get mixed around too much. It compiles under Linux and works. So that is at least a good sign. =) 20010122 - (bal) OpenBSD Resync - markus@cvs.openbsd.org 2001/01/19 12:45:26 GMT 2001 by markus [servconf.c ssh.h sshd.c] only auth-chall.c needs #ifdef SKEY - markus@cvs.openbsd.org 2001/01/19 15:55:10 GMT 2001 by markus [auth-krb4.c auth-options.c auth-rh-rsa.c auth-rhosts.c auth-rsa.c auth1.c auth2.c channels.c clientloop.c dh.c dispatch.c nchan.c packet.c pathname.h readconf.c scp.c servconf.c serverloop.c session.c ssh-add.c ssh-keygen.c ssh-keyscan.c ssh.c ssh.h ssh1.h sshconnect1.c sshd.c ttymodes.c] move ssh1 definitions to ssh1.h, pathnames to pathnames.h - markus@cvs.openbsd.org 2001/01/19 16:48:14 [sshd.8] fix typo; from stevesk@ - markus@cvs.openbsd.org 2001/01/19 16:50:58 [ssh-dss.c] clear and free digest, make consistent with other code (use dlen); from stevesk@ - markus@cvs.openbsd.org 2001/01/20 15:55:20 GMT 2001 by markus [auth-options.c auth-options.h auth-rsa.c auth2.c] pass the filename to auth_parse_options() - markus@cvs.openbsd.org 2001/01/20 17:59:40 GMT 2001 [readconf.c] fix SIGSEGV from -o ""; problem noted by jehsom@togetherweb.com - stevesk@cvs.openbsd.org 2001/01/20 18:20:29 [sshconnect2.c] dh_new_group() does not return NULL. ok markus@ - markus@cvs.openbsd.org 2001/01/20 21:33:42 [ssh-add.c] do not loop forever if askpass does not exist; from andrew@pimlott.ne.mediaone.net - djm@cvs.openbsd.org 2001/01/20 23:00:56 [servconf.c] Check for NULL return from strdelim; ok markus - djm@cvs.openbsd.org 2001/01/20 23:02:07 [readconf.c] KNF; ok markus - jakob@cvs.openbsd.org 2001/01/21 9:00:33 [ssh-keygen.1] remove -R flag; ok markus@ - markus@cvs.openbsd.org 2001/01/21 19:05:40 [atomicio.c automicio.h auth-chall.c auth-krb4.c auth-options.c auth-options.h auth-passwd.c auth-rh-rsa.c auth-rhosts.c auth-rsa.c auth.c auth.h auth1.c auth2-chall.c auth2.c authfd.c authfile.c bufaux.c bufaux.h buffer.c canahost.c canahost.h channels.c cipher.c cli.c clientloop.c clientloop.h compat.c compress.c deattack.c dh.c dispatch.c groupaccess.c hmac.c hostfile.c kex.c key.c key.h log-client.c log-server.c log.c log.h login.c login.h match.c misc.c misc.h nchan.c packet.c pty.c radix.h readconf.c readpass.c readpass.h rsa.c scp.c servconf.c serverloop.c serverloop.h session.c sftp-server.c ssh-add.c ssh-agent.c ssh-dss.c ssh-keygen.c ssh-keyscan.c ssh-rsa.c ssh.c ssh.h sshconnect.c sshconnect.h sshconnect1.c sshconnect2.c sshd.c tildexpand.c tildexpand.h ttysmodes.c uidswap.c xmalloc.c] split ssh.h and try to cleanup the #include mess. remove unnecessary #includes. rename util.[ch] -> misc.[ch] - (bal) renamed 'PIDDIR' to '_PATH_SSH_PIDDIR' to match OpenBSD tree - (bal) Moved #ifdef KRB4 in auth-krb4.c above the #include to resolve conflict when compiling for non-kerb install - (bal) removed the #ifdef SKEY in auth1.c to match Markus' changes on 1/19.
2001-01-22 05:34:40 +00:00
if (!auth_parse_options(pw, options, file, linenum))
continue;
/* break out, this key is allowed */
allowed = 1;
break;
1999-10-27 03:42:43 +00:00
}
/* Restore the privileged uid. */
restore_uid();
1999-10-27 03:42:43 +00:00
/* Close the file. */
xfree(file);
fclose(f);
1999-10-27 03:42:43 +00:00
/* return key if allowed */
if (allowed && rkey != NULL)
*rkey = key;
- (djm) Big OpenBSD sync: - markus@cvs.openbsd.org 2000/09/30 10:27:44 [log.c] allow loglevel debug - markus@cvs.openbsd.org 2000/10/03 11:59:57 [packet.c] hmac->mac - markus@cvs.openbsd.org 2000/10/03 12:03:03 [auth-krb4.c auth-passwd.c auth-rh-rsa.c auth-rhosts.c auth-rsa.c auth1.c] move fake-auth from auth1.c to individual auth methods, disables s/key in debug-msg - markus@cvs.openbsd.org 2000/10/03 12:16:48 ssh.c do not resolve canonname, i have no idea why this was added oin ossh - markus@cvs.openbsd.org 2000/10/09 15:30:44 ssh-keygen.1 ssh-keygen.c -X now reads private ssh.com DSA keys, too. - markus@cvs.openbsd.org 2000/10/09 15:32:34 auth-options.c clear options on every call. - markus@cvs.openbsd.org 2000/10/09 15:51:00 authfd.c authfd.h interop with ssh-agent2, from <res@shore.net> - markus@cvs.openbsd.org 2000/10/10 14:20:45 compat.c use rexexp for version string matching - provos@cvs.openbsd.org 2000/10/10 22:02:18 [kex.c kex.h myproposal.h ssh.h ssh2.h sshconnect2.c sshd.c dh.c dh.h] First rough implementation of the diffie-hellman group exchange. The client can ask the server for bigger groups to perform the diffie-hellman in, thus increasing the attack complexity when using ciphers with longer keys. University of Windsor provided network, T the company. - markus@cvs.openbsd.org 2000/10/11 13:59:52 [auth-rsa.c auth2.c] clear auth options unless auth sucessfull - markus@cvs.openbsd.org 2000/10/11 14:00:27 [auth-options.h] clear auth options unless auth sucessfull - markus@cvs.openbsd.org 2000/10/11 14:03:27 [scp.1 scp.c] support 'scp -o' with help from mouring@pconline.com - markus@cvs.openbsd.org 2000/10/11 14:11:35 [dh.c] Wall - markus@cvs.openbsd.org 2000/10/11 14:14:40 [auth.h auth2.c readconf.c readconf.h readpass.c servconf.c servconf.h] [ssh.h sshconnect2.c sshd_config auth2-skey.c cli.c cli.h] add support for s/key (kbd-interactive) to ssh2, based on work by mkiernan@avantgo.com and me - markus@cvs.openbsd.org 2000/10/11 14:27:24 [auth.c auth1.c auth2.c authfile.c cipher.c cipher.h kex.c kex.h] [myproposal.h packet.c readconf.c session.c ssh.c ssh.h sshconnect1.c] [sshconnect2.c sshd.c] new cipher framework - markus@cvs.openbsd.org 2000/10/11 14:45:21 [cipher.c] remove DES - markus@cvs.openbsd.org 2000/10/12 03:59:20 [cipher.c cipher.h sshconnect1.c sshconnect2.c sshd.c] enable DES in SSH-1 clients only - markus@cvs.openbsd.org 2000/10/12 08:21:13 [kex.h packet.c] remove unused - markus@cvs.openbsd.org 2000/10/13 12:34:46 [sshd.c] Kludge for F-Secure Macintosh < 1.0.2; appro@fy.chalmers.se - markus@cvs.openbsd.org 2000/10/13 12:59:15 [cipher.c cipher.h myproposal.h rijndael.c rijndael.h] rijndael/aes support - markus@cvs.openbsd.org 2000/10/13 13:10:54 [sshd.8] more info about -V - markus@cvs.openbsd.org 2000/10/13 13:12:02 [myproposal.h] prefer no compression
2000-10-14 05:23:11 +00:00
else
key_free(key);
return (allowed);
}
/*
* Performs the RSA authentication dialog with the client. This returns
* 0 if the client could not be authenticated, and 1 if authentication was
* successful. This may exit if there is a serious protocol violation.
*/
int
auth_rsa(struct passwd *pw, BIGNUM *client_n)
{
Key *key;
char *fp;
/* no user given */
if (pw == NULL)
return 0;
if (!PRIVSEP(auth_rsa_key_allowed(pw, client_n, &key))) {
- (djm) Big OpenBSD sync: - markus@cvs.openbsd.org 2000/09/30 10:27:44 [log.c] allow loglevel debug - markus@cvs.openbsd.org 2000/10/03 11:59:57 [packet.c] hmac->mac - markus@cvs.openbsd.org 2000/10/03 12:03:03 [auth-krb4.c auth-passwd.c auth-rh-rsa.c auth-rhosts.c auth-rsa.c auth1.c] move fake-auth from auth1.c to individual auth methods, disables s/key in debug-msg - markus@cvs.openbsd.org 2000/10/03 12:16:48 ssh.c do not resolve canonname, i have no idea why this was added oin ossh - markus@cvs.openbsd.org 2000/10/09 15:30:44 ssh-keygen.1 ssh-keygen.c -X now reads private ssh.com DSA keys, too. - markus@cvs.openbsd.org 2000/10/09 15:32:34 auth-options.c clear options on every call. - markus@cvs.openbsd.org 2000/10/09 15:51:00 authfd.c authfd.h interop with ssh-agent2, from <res@shore.net> - markus@cvs.openbsd.org 2000/10/10 14:20:45 compat.c use rexexp for version string matching - provos@cvs.openbsd.org 2000/10/10 22:02:18 [kex.c kex.h myproposal.h ssh.h ssh2.h sshconnect2.c sshd.c dh.c dh.h] First rough implementation of the diffie-hellman group exchange. The client can ask the server for bigger groups to perform the diffie-hellman in, thus increasing the attack complexity when using ciphers with longer keys. University of Windsor provided network, T the company. - markus@cvs.openbsd.org 2000/10/11 13:59:52 [auth-rsa.c auth2.c] clear auth options unless auth sucessfull - markus@cvs.openbsd.org 2000/10/11 14:00:27 [auth-options.h] clear auth options unless auth sucessfull - markus@cvs.openbsd.org 2000/10/11 14:03:27 [scp.1 scp.c] support 'scp -o' with help from mouring@pconline.com - markus@cvs.openbsd.org 2000/10/11 14:11:35 [dh.c] Wall - markus@cvs.openbsd.org 2000/10/11 14:14:40 [auth.h auth2.c readconf.c readconf.h readpass.c servconf.c servconf.h] [ssh.h sshconnect2.c sshd_config auth2-skey.c cli.c cli.h] add support for s/key (kbd-interactive) to ssh2, based on work by mkiernan@avantgo.com and me - markus@cvs.openbsd.org 2000/10/11 14:27:24 [auth.c auth1.c auth2.c authfile.c cipher.c cipher.h kex.c kex.h] [myproposal.h packet.c readconf.c session.c ssh.c ssh.h sshconnect1.c] [sshconnect2.c sshd.c] new cipher framework - markus@cvs.openbsd.org 2000/10/11 14:45:21 [cipher.c] remove DES - markus@cvs.openbsd.org 2000/10/12 03:59:20 [cipher.c cipher.h sshconnect1.c sshconnect2.c sshd.c] enable DES in SSH-1 clients only - markus@cvs.openbsd.org 2000/10/12 08:21:13 [kex.h packet.c] remove unused - markus@cvs.openbsd.org 2000/10/13 12:34:46 [sshd.c] Kludge for F-Secure Macintosh < 1.0.2; appro@fy.chalmers.se - markus@cvs.openbsd.org 2000/10/13 12:59:15 [cipher.c cipher.h myproposal.h rijndael.c rijndael.h] rijndael/aes support - markus@cvs.openbsd.org 2000/10/13 13:10:54 [sshd.8] more info about -V - markus@cvs.openbsd.org 2000/10/13 13:12:02 [myproposal.h] prefer no compression
2000-10-14 05:23:11 +00:00
auth_clear_options();
return (0);
}
/* Perform the challenge-response dialog for this key. */
if (!auth_rsa_challenge_dialog(key)) {
/* Wrong response. */
verbose("Wrong response to RSA authentication challenge.");
packet_send_debug("Wrong response to RSA authentication challenge.");
/*
* Break out of the loop. Otherwise we might send
* another challenge and break the protocol.
*/
key_free(key);
return (0);
}
/*
* Correct response. The client has been successfully
* authenticated. Note that we have not yet processed the
* options; this will be reset if the options cause the
* authentication to be rejected.
*/
fp = key_fingerprint(key, SSH_FP_MD5, SSH_FP_HEX);
verbose("Found matching %s key: %s",
key_type(key), fp);
xfree(fp);
key_free(key);
1999-10-27 03:42:43 +00:00
packet_send_debug("RSA authentication accepted.");
return (1);
1999-10-27 03:42:43 +00:00
}