openssl-compat.h revision 323134 
1/*
2 * Copyright (c) 2005 Darren Tucker <dtucker@zip.com.au>
3 *
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
13 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
14 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17#ifndef _OPENSSL_COMPAT_H
18#define _OPENSSL_COMPAT_H
19
20#include "includes.h"
21#ifdef WITH_OPENSSL
22
23#include <openssl/opensslv.h>
24#include <openssl/evp.h>
25#include <openssl/rsa.h>
26#include <openssl/dsa.h>
27
28int ssh_compatible_openssl(long, long);
29
30#if (OPENSSL_VERSION_NUMBER <= 0x0090805fL)
31# error OpenSSL 0.9.8f or greater is required
32#endif
33
34#if OPENSSL_VERSION_NUMBER < 0x10000001L
35# define LIBCRYPTO_EVP_INL_TYPE unsigned int
36#else
37# define LIBCRYPTO_EVP_INL_TYPE size_t
38#endif
39
40#ifndef OPENSSL_RSA_MAX_MODULUS_BITS
41# define OPENSSL_RSA_MAX_MODULUS_BITS	16384
42#endif
43#ifndef OPENSSL_DSA_MAX_MODULUS_BITS
44# define OPENSSL_DSA_MAX_MODULUS_BITS	10000
45#endif
46
47#ifndef OPENSSL_HAVE_EVPCTR
48# define EVP_aes_128_ctr evp_aes_128_ctr
49# define EVP_aes_192_ctr evp_aes_128_ctr
50# define EVP_aes_256_ctr evp_aes_128_ctr
51const EVP_CIPHER *evp_aes_128_ctr(void);
52void ssh_aes_ctr_iv(EVP_CIPHER_CTX *, int, u_char *, size_t);
53#endif
54
55/* Avoid some #ifdef. Code that uses these is unreachable without GCM */
56#if !defined(OPENSSL_HAVE_EVPGCM) && !defined(EVP_CTRL_GCM_SET_IV_FIXED)
57# define EVP_CTRL_GCM_SET_IV_FIXED -1
58# define EVP_CTRL_GCM_IV_GEN -1
59# define EVP_CTRL_GCM_SET_TAG -1
60# define EVP_CTRL_GCM_GET_TAG -1
61#endif
62
63/* Replace missing EVP_CIPHER_CTX_ctrl() with something that returns failure */
64#ifndef HAVE_EVP_CIPHER_CTX_CTRL
65# ifdef OPENSSL_HAVE_EVPGCM
66#  error AES-GCM enabled without EVP_CIPHER_CTX_ctrl /* shouldn't happen */
67# else
68# define EVP_CIPHER_CTX_ctrl(a,b,c,d) (0)
69# endif
70#endif
71
72#if defined(HAVE_EVP_RIPEMD160)
73# if defined(OPENSSL_NO_RIPEMD) || defined(OPENSSL_NO_RMD160)
74#  undef HAVE_EVP_RIPEMD160
75# endif
76#endif
77
78/*
79 * We overload some of the OpenSSL crypto functions with ssh_* equivalents
80 * to automatically handle OpenSSL engine initialisation.
81 *
82 * In order for the compat library to call the real functions, it must
83 * define SSH_DONT_OVERLOAD_OPENSSL_FUNCS before including this file and
84 * implement the ssh_* equivalents.
85 */
86#ifndef SSH_DONT_OVERLOAD_OPENSSL_FUNCS
87
88# ifdef USE_OPENSSL_ENGINE
89#  ifdef OpenSSL_add_all_algorithms
90#   undef OpenSSL_add_all_algorithms
91#  endif
92#  define OpenSSL_add_all_algorithms()  ssh_OpenSSL_add_all_algorithms()
93# endif
94
95void ssh_OpenSSL_add_all_algorithms(void);
96
97#endif	/* SSH_DONT_OVERLOAD_OPENSSL_FUNCS */
98
99#endif /* WITH_OPENSSL */
100#endif /* _OPENSSL_COMPAT_H */
101