openssl-compat.c revision 295367 
1/* $Id: openssl-compat.c,v 1.19 2014/07/02 05:28:07 djm Exp $ */
2
3/*
4 * Copyright (c) 2005 Darren Tucker <dtucker@zip.com.au>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19#define SSH_DONT_OVERLOAD_OPENSSL_FUNCS
20#include "includes.h"
21
22#ifdef WITH_OPENSSL
23
24#include <stdarg.h>
25#include <string.h>
26
27#ifdef USE_OPENSSL_ENGINE
28# include <openssl/engine.h>
29# include <openssl/conf.h>
30#endif
31
32#include "log.h"
33
34#include "openssl-compat.h"
35
36/*
37 * OpenSSL version numbers: MNNFFPPS: major minor fix patch status
38 * We match major, minor, fix and status (not patch) for <1.0.0.
39 * After that, we acceptable compatible fix versions (so we
40 * allow 1.0.1 to work with 1.0.0). Going backwards is only allowed
41 * within a patch series.
42 */
43
44int
45ssh_compatible_openssl(long headerver, long libver)
46{
47	long mask, hfix, lfix;
48
49	/* exact match is always OK */
50	if (headerver == libver)
51		return 1;
52
53	/* for versions < 1.0.0, major,minor,fix,status must match */
54	if (headerver < 0x1000000f) {
55		mask = 0xfffff00fL; /* major,minor,fix,status */
56		return (headerver & mask) == (libver & mask);
57	}
58
59	/*
60	 * For versions >= 1.0.0, major,minor,status must match and library
61	 * fix version must be equal to or newer than the header.
62	 */
63	mask = 0xfff0000fL; /* major,minor,status */
64	hfix = (headerver & 0x000ff000) >> 12;
65	lfix = (libver & 0x000ff000) >> 12;
66	if ( (headerver & mask) == (libver & mask) && lfix >= hfix)
67		return 1;
68	return 0;
69}
70
71#ifdef	USE_OPENSSL_ENGINE
72void
73ssh_OpenSSL_add_all_algorithms(void)
74{
75	OpenSSL_add_all_algorithms();
76
77	/* Enable use of crypto hardware */
78	ENGINE_load_builtin_engines();
79	ENGINE_register_all_complete();
80	OPENSSL_config(NULL);
81}
82#endif
83
84#endif /* WITH_OPENSSL */
85