openssh/mpaux.c
Damien Miller 6536c7d3c9 - OpenBSD CVS Updates:
- markus@cvs.openbsd.org  2000/06/18 18:50:11
     [auth2.c compat.c compat.h sshconnect2.c]
     make userauth+pubkey interop with ssh.com-2.2.0
   - markus@cvs.openbsd.org  2000/06/18 20:56:17
     [dsa.c]
     mem leak + be more paranoid in dsa_verify.
   - markus@cvs.openbsd.org  2000/06/18 21:29:50
     [key.c]
     cleanup fingerprinting, less hardcoded sizes
   - markus@cvs.openbsd.org  2000/06/19 19:39:45
     [atomicio.c auth-options.c auth-passwd.c auth-rh-rsa.c auth-rhosts.c]
     [auth-rsa.c auth-skey.c authfd.c authfd.h authfile.c bufaux.c bufaux.h]
     [buffer.c buffer.h canohost.c channels.c channels.h cipher.c cipher.h]
     [clientloop.c compat.c compat.h compress.c compress.h crc32.c crc32.h]
     [deattack.c dispatch.c dsa.c fingerprint.c fingerprint.h getput.h hmac.c]
     [kex.c log-client.c log-server.c login.c match.c mpaux.c mpaux.h nchan.c]
     [nchan.h packet.c packet.h pty.c pty.h readconf.c readconf.h readpass.c]
     [rsa.c rsa.h scp.c servconf.c servconf.h ssh-add.c ssh-keygen.c ssh.c]
     [ssh.h tildexpand.c ttymodes.c ttymodes.h uidswap.c xmalloc.c xmalloc.h]
     OpenBSD tag
   - markus@cvs.openbsd.org  2000/06/21 10:46:10
     sshconnect2.c missing free; nuke old comment
2000-06-22 21:32:31 +10:00

47 lines
1.1 KiB
C

/*
*
* mpaux.c
*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
*
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
* All rights reserved
*
* Created: Sun Jul 16 04:29:30 1995 ylo
*
* This file contains various auxiliary functions related to multiple
* precision integers.
*
*/
#include "includes.h"
RCSID("$OpenBSD: mpaux.c,v 1.13 2000/06/20 01:39:42 markus Exp $");
#include <openssl/bn.h>
#include "getput.h"
#include "xmalloc.h"
#include <openssl/md5.h>
void
compute_session_id(unsigned char session_id[16],
unsigned char cookie[8],
BIGNUM* host_key_n,
BIGNUM* session_key_n)
{
unsigned int host_key_bytes = BN_num_bytes(host_key_n);
unsigned int session_key_bytes = BN_num_bytes(session_key_n);
unsigned int bytes = host_key_bytes + session_key_bytes;
unsigned char *buf = xmalloc(bytes);
MD5_CTX md;
BN_bn2bin(host_key_n, buf);
BN_bn2bin(session_key_n, buf + host_key_bytes);
MD5_Init(&md);
MD5_Update(&md, buf, bytes);
MD5_Update(&md, cookie, 8);
MD5_Final(session_id, &md);
memset(buf, 0, bytes);
xfree(buf);
}