diff options
Diffstat (limited to 'crypto/openssh/mpaux.c')
| -rw-r--r-- | crypto/openssh/mpaux.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/crypto/openssh/mpaux.c b/crypto/openssh/mpaux.c new file mode 100644 index 0000000..7df7791 --- /dev/null +++ b/crypto/openssh/mpaux.c @@ -0,0 +1,45 @@ +/* + * Author: Tatu Ylonen <ylo@cs.hut.fi> + * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland + * All rights reserved + * This file contains various auxiliary functions related to multiple + * precision integers. + * + * 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". + */ + +#include "includes.h" +RCSID("$OpenBSD: mpaux.c,v 1.14 2000/09/07 20:27:52 deraadt Exp $"); +RCSID("$FreeBSD$"); + +#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); +} |
