Annotation of src/usr.bin/ssh/mpaux.c, Revision 1.5
1.1 deraadt 1: /*
2:
3: mpaux.c
4:
5: Author: Tatu Ylonen <ylo@cs.hut.fi>
6:
7: Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
8: All rights reserved
9:
10: Created: Sun Jul 16 04:29:30 1995 ylo
11:
12: This file contains various auxiliary functions related to multiple
13: precision integers.
14:
15: */
16:
17: #include "includes.h"
1.5 ! markus 18: RCSID("$Id: mpaux.c,v 1.4 1999/10/27 16:37:45 deraadt Exp $");
1.1 deraadt 19:
1.2 provos 20: #include <ssl/bn.h>
1.1 deraadt 21: #include "getput.h"
22: #include "xmalloc.h"
1.3 deraadt 23:
1.4 deraadt 24: #include <ssl/md5.h>
1.1 deraadt 25:
1.2 provos 26: void
27: compute_session_id(unsigned char session_id[16],
28: unsigned char cookie[8],
29: unsigned int host_key_bits,
30: BIGNUM *host_key_n,
31: unsigned int session_key_bits,
32: BIGNUM *session_key_n)
1.1 deraadt 33: {
34: unsigned int bytes = (host_key_bits + 7) / 8 + (session_key_bits + 7) / 8 + 8;
35: unsigned char *buf = xmalloc(bytes);
1.3 deraadt 36: MD5_CTX md;
1.1 deraadt 37:
1.2 provos 38: BN_bn2bin(host_key_n, buf);
39: BN_bn2bin(session_key_n, buf + (host_key_bits + 7 ) / 8);
1.1 deraadt 40: memcpy(buf + (host_key_bits + 7) / 8 + (session_key_bits + 7) / 8,
41: cookie, 8);
1.4 deraadt 42: MD5_Init(&md);
43: MD5_Update(&md, buf, bytes);
44: MD5_Final(session_id, &md);
1.5 ! markus 45: memset(buf, 0, bytes);
1.1 deraadt 46: xfree(buf);
47: }