1/* $Id: openssl-compat.h,v 1.19 2011/05/10 01:13:38 dtucker 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#include "includes.h"
20#include <openssl/opensslv.h>
21#include <openssl/evp.h>
22#include <openssl/rsa.h>
23#include <openssl/dsa.h>
24
25/* Only in 0.9.8 */
26#ifndef OPENSSL_DSA_MAX_MODULUS_BITS
27# define OPENSSL_DSA_MAX_MODULUS_BITS        10000
28#endif
29#ifndef OPENSSL_RSA_MAX_MODULUS_BITS
30# define OPENSSL_RSA_MAX_MODULUS_BITS        16384
31#endif
32
33/* OPENSSL_free() is Free() in versions before OpenSSL 0.9.6 */
34#if !defined(OPENSSL_VERSION_NUMBER) || (OPENSSL_VERSION_NUMBER < 0x0090600f)
35# define OPENSSL_free(x) Free(x)
36#endif
37
38#if OPENSSL_VERSION_NUMBER < 0x00906000L
39# define SSH_OLD_EVP
40# define EVP_CIPHER_CTX_get_app_data(e)		((e)->app_data)
41#endif
42
43#if OPENSSL_VERSION_NUMBER < 0x1000000fL
44# define LIBCRYPTO_EVP_INL_TYPE unsigned int
45#else
46# define LIBCRYPTO_EVP_INL_TYPE size_t
47#endif
48
49#if (OPENSSL_VERSION_NUMBER < 0x00907000L) || defined(OPENSSL_LOBOTOMISED_AES)
50# define USE_BUILTIN_RIJNDAEL
51#endif
52
53#ifdef USE_BUILTIN_RIJNDAEL
54# include "rijndael.h"
55# define AES_KEY rijndael_ctx
56# define AES_BLOCK_SIZE 16
57# define AES_encrypt(a, b, c)		rijndael_encrypt(c, a, b)
58# define AES_set_encrypt_key(a, b, c)	rijndael_set_key(c, (char *)a, b, 1)
59# define EVP_aes_128_cbc evp_rijndael
60# define EVP_aes_192_cbc evp_rijndael
61# define EVP_aes_256_cbc evp_rijndael
62extern const EVP_CIPHER *evp_rijndael(void);
63extern void ssh_rijndael_iv(EVP_CIPHER_CTX *, int, u_char *, u_int);
64#endif
65
66#if !defined(EVP_CTRL_SET_ACSS_MODE)
67# if (OPENSSL_VERSION_NUMBER >= 0x00907000L)
68#  define USE_CIPHER_ACSS 1
69extern const EVP_CIPHER *evp_acss(void);
70#  define EVP_acss evp_acss
71# else
72#  define EVP_acss NULL
73# endif
74#endif
75
76/* OpenSSL 0.9.8e returns cipher key len not context key len */
77#if (OPENSSL_VERSION_NUMBER == 0x0090805fL)
78# define EVP_CIPHER_CTX_key_length(c) ((c)->key_len)
79#endif
80
81#ifndef HAVE_RSA_GET_DEFAULT_METHOD
82RSA_METHOD *RSA_get_default_method(void);
83#endif
84
85/*
86 * We overload some of the OpenSSL crypto functions with ssh_* equivalents
87 * which cater for older and/or less featureful OpenSSL version.
88 *
89 * In order for the compat library to call the real functions, it must
90 * define SSH_DONT_OVERLOAD_OPENSSL_FUNCS before including this file and
91 * implement the ssh_* equivalents.
92 */
93#ifndef SSH_DONT_OVERLOAD_OPENSSL_FUNCS
94
95# ifdef SSH_OLD_EVP
96#  ifdef EVP_Cipher
97#   undef EVP_Cipher
98#  endif
99#  define EVP_CipherInit(a,b,c,d,e)	ssh_EVP_CipherInit((a),(b),(c),(d),(e))
100#  define EVP_Cipher(a,b,c,d)		ssh_EVP_Cipher((a),(b),(c),(d))
101#  define EVP_CIPHER_CTX_cleanup(a)	ssh_EVP_CIPHER_CTX_cleanup((a))
102# endif /* SSH_OLD_EVP */
103
104# ifdef OPENSSL_EVP_DIGESTUPDATE_VOID
105#  define EVP_DigestUpdate(a,b,c)	ssh_EVP_DigestUpdate((a),(b),(c))
106#  endif
107
108# ifdef USE_OPENSSL_ENGINE
109#  ifdef OpenSSL_add_all_algorithms
110#   undef OpenSSL_add_all_algorithms
111#  endif
112#  define OpenSSL_add_all_algorithms()  ssh_OpenSSL_add_all_algorithms()
113# endif
114
115# ifndef HAVE_BN_IS_PRIME_EX
116int BN_is_prime_ex(const BIGNUM *, int, BN_CTX *, void *);
117# endif
118
119# ifndef HAVE_DSA_GENERATE_PARAMETERS_EX
120int DSA_generate_parameters_ex(DSA *, int, const unsigned char *, int, int *,
121    unsigned long *, void *);
122# endif
123
124# ifndef HAVE_RSA_GENERATE_KEY_EX
125int RSA_generate_key_ex(RSA *, int, BIGNUM *, void *);
126# endif
127
128int ssh_EVP_CipherInit(EVP_CIPHER_CTX *, const EVP_CIPHER *, unsigned char *,
129    unsigned char *, int);
130int ssh_EVP_Cipher(EVP_CIPHER_CTX *, char *, char *, int);
131int ssh_EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *);
132void ssh_OpenSSL_add_all_algorithms(void);
133#endif	/* SSH_DONT_OVERLOAD_OPENSSL_FUNCS */
134
135