openssl-compat.h revision 295367 
1/* $Id: openssl-compat.h,v 1.31 2014/08/29 18:18:29 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#ifndef _OPENSSL_COMPAT_H
20#define _OPENSSL_COMPAT_H
21
22#include "includes.h"
23#ifdef WITH_OPENSSL
24
25#include <openssl/opensslv.h>
26#include <openssl/evp.h>
27#include <openssl/rsa.h>
28#include <openssl/dsa.h>
29
30int ssh_compatible_openssl(long, long);
31
32#if (OPENSSL_VERSION_NUMBER <= 0x0090805fL)
33# error OpenSSL 0.9.8f or greater is required
34#endif
35
36#if OPENSSL_VERSION_NUMBER < 0x10000001L
37# define LIBCRYPTO_EVP_INL_TYPE unsigned int
38#else
39# define LIBCRYPTO_EVP_INL_TYPE size_t
40#endif
41
42#ifndef OPENSSL_RSA_MAX_MODULUS_BITS
43# define OPENSSL_RSA_MAX_MODULUS_BITS	16384
44#endif
45#ifndef OPENSSL_DSA_MAX_MODULUS_BITS
46# define OPENSSL_DSA_MAX_MODULUS_BITS	10000
47#endif
48
49#ifndef OPENSSL_HAVE_EVPCTR
50# define EVP_aes_128_ctr evp_aes_128_ctr
51# define EVP_aes_192_ctr evp_aes_128_ctr
52# define EVP_aes_256_ctr evp_aes_128_ctr
53const EVP_CIPHER *evp_aes_128_ctr(void);
54void ssh_aes_ctr_iv(EVP_CIPHER_CTX *, int, u_char *, size_t);
55#endif
56
57/* Avoid some #ifdef. Code that uses these is unreachable without GCM */
58#if !defined(OPENSSL_HAVE_EVPGCM) && !defined(EVP_CTRL_GCM_SET_IV_FIXED)
59# define EVP_CTRL_GCM_SET_IV_FIXED -1
60# define EVP_CTRL_GCM_IV_GEN -1
61# define EVP_CTRL_GCM_SET_TAG -1
62# define EVP_CTRL_GCM_GET_TAG -1
63#endif
64
65/* Replace missing EVP_CIPHER_CTX_ctrl() with something that returns failure */
66#ifndef HAVE_EVP_CIPHER_CTX_CTRL
67# ifdef OPENSSL_HAVE_EVPGCM
68#  error AES-GCM enabled without EVP_CIPHER_CTX_ctrl /* shouldn't happen */
69# else
70# define EVP_CIPHER_CTX_ctrl(a,b,c,d) (0)
71# endif
72#endif
73
74/*
75 * We overload some of the OpenSSL crypto functions with ssh_* equivalents
76 * to automatically handle OpenSSL engine initialisation.
77 *
78 * In order for the compat library to call the real functions, it must
79 * define SSH_DONT_OVERLOAD_OPENSSL_FUNCS before including this file and
80 * implement the ssh_* equivalents.
81 */
82#ifndef SSH_DONT_OVERLOAD_OPENSSL_FUNCS
83
84# ifdef USE_OPENSSL_ENGINE
85#  ifdef OpenSSL_add_all_algorithms
86#   undef OpenSSL_add_all_algorithms
87#  endif
88#  define OpenSSL_add_all_algorithms()  ssh_OpenSSL_add_all_algorithms()
89# endif
90
91void ssh_OpenSSL_add_all_algorithms(void);
92
93#endif	/* SSH_DONT_OVERLOAD_OPENSSL_FUNCS */
94
95#endif /* WITH_OPENSSL */
96#endif /* _OPENSSL_COMPAT_H */
97