]>
Commit | Line | Data |
---|---|---|
8efc0c15 | 1 | /* |
5260325f | 2 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
5260325f | 3 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
4 | * All rights reserved | |
5260325f | 5 | * This file contains various auxiliary functions related to multiple |
6 | * precision integers. | |
6ae2364d | 7 | * |
bcbf86ec | 8 | * As far as I am concerned, the code I have written for this software |
9 | * can be used freely for any purpose. Any derived versions of this | |
10 | * software must be clearly marked as such, and if the derived work is | |
11 | * incompatible with the protocol description in the RFC file, it must be | |
12 | * called by a name other than "ssh" or "Secure Shell". | |
13 | */ | |
8efc0c15 | 14 | |
15 | #include "includes.h" | |
5ca51e19 | 16 | RCSID("$OpenBSD: mpaux.c,v 1.16 2001/02/08 19:30:52 itojun Exp $"); |
8efc0c15 | 17 | |
35484284 | 18 | #include <openssl/bn.h> |
5260325f | 19 | #include "getput.h" |
20 | #include "xmalloc.h" | |
21 | ||
5881cd60 | 22 | #include <openssl/md5.h> |
5881cd60 | 23 | |
5ca51e19 | 24 | #include "mpaux.h" |
25 | ||
8efc0c15 | 26 | void |
1e3b8b07 | 27 | compute_session_id(u_char session_id[16], |
28 | u_char cookie[8], | |
7368a6c8 | 29 | BIGNUM* host_key_n, |
30 | BIGNUM* session_key_n) | |
8efc0c15 | 31 | { |
1e3b8b07 | 32 | u_int host_key_bytes = BN_num_bytes(host_key_n); |
33 | u_int session_key_bytes = BN_num_bytes(session_key_n); | |
34 | u_int bytes = host_key_bytes + session_key_bytes; | |
35 | u_char *buf = xmalloc(bytes); | |
5260325f | 36 | MD5_CTX md; |
37 | ||
38 | BN_bn2bin(host_key_n, buf); | |
95f1eccc | 39 | BN_bn2bin(session_key_n, buf + host_key_bytes); |
5260325f | 40 | MD5_Init(&md); |
41 | MD5_Update(&md, buf, bytes); | |
95f1eccc | 42 | MD5_Update(&md, cookie, 8); |
5260325f | 43 | MD5_Final(session_id, &md); |
44 | memset(buf, 0, bytes); | |
45 | xfree(buf); | |
8efc0c15 | 46 | } |