openssl-compat.h revision 264377 
1/* $Id: openssl-compat.h,v 1.26 2014/02/13 05:38:33 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 < 0x10000001L
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
62const EVP_CIPHER *evp_rijndael(void);
63void ssh_rijndael_iv(EVP_CIPHER_CTX *, int, u_char *, u_int);
64#endif
65
66#ifndef OPENSSL_HAVE_EVPCTR
67#define EVP_aes_128_ctr evp_aes_128_ctr
68#define EVP_aes_192_ctr evp_aes_128_ctr
69#define EVP_aes_256_ctr evp_aes_128_ctr
70const EVP_CIPHER *evp_aes_128_ctr(void);
71void ssh_aes_ctr_iv(EVP_CIPHER_CTX *, int, u_char *, size_t);
72#endif
73
74/* Avoid some #ifdef. Code that uses these is unreachable without GCM */
75#if !defined(OPENSSL_HAVE_EVPGCM) && !defined(EVP_CTRL_GCM_SET_IV_FIXED)
76# define EVP_CTRL_GCM_SET_IV_FIXED -1
77# define EVP_CTRL_GCM_IV_GEN -1
78# define EVP_CTRL_GCM_SET_TAG -1
79# define EVP_CTRL_GCM_GET_TAG -1
80#endif
81
82/* Replace missing EVP_CIPHER_CTX_ctrl() with something that returns failure */
83#ifndef HAVE_EVP_CIPHER_CTX_CTRL
84# ifdef OPENSSL_HAVE_EVPGCM
85#  error AES-GCM enabled without EVP_CIPHER_CTX_ctrl /* shouldn't happen */
86# else
87# define EVP_CIPHER_CTX_ctrl(a,b,c,d) (0)
88# endif
89#endif
90
91#if OPENSSL_VERSION_NUMBER < 0x00907000L
92#define EVP_X_STATE(evp)	&(evp).c
93#define EVP_X_STATE_LEN(evp)	sizeof((evp).c)
94#else
95#define EVP_X_STATE(evp)	(evp).cipher_data
96#define EVP_X_STATE_LEN(evp)	(evp).cipher->ctx_size
97#endif
98
99/* OpenSSL 0.9.8e returns cipher key len not context key len */
100#if (OPENSSL_VERSION_NUMBER == 0x0090805fL)
101# define EVP_CIPHER_CTX_key_length(c) ((c)->key_len)
102#endif
103
104#ifndef HAVE_RSA_GET_DEFAULT_METHOD
105RSA_METHOD *RSA_get_default_method(void);
106#endif
107
108/*
109 * We overload some of the OpenSSL crypto functions with ssh_* equivalents
110 * which cater for older and/or less featureful OpenSSL version.
111 *
112 * In order for the compat library to call the real functions, it must
113 * define SSH_DONT_OVERLOAD_OPENSSL_FUNCS before including this file and
114 * implement the ssh_* equivalents.
115 */
116#ifndef SSH_DONT_OVERLOAD_OPENSSL_FUNCS
117
118# ifdef SSH_OLD_EVP
119#  ifdef EVP_Cipher
120#   undef EVP_Cipher
121#  endif
122#  define EVP_CipherInit(a,b,c,d,e)	ssh_EVP_CipherInit((a),(b),(c),(d),(e))
123#  define EVP_Cipher(a,b,c,d)		ssh_EVP_Cipher((a),(b),(c),(d))
124#  define EVP_CIPHER_CTX_cleanup(a)	ssh_EVP_CIPHER_CTX_cleanup((a))
125# endif /* SSH_OLD_EVP */
126
127# ifdef OPENSSL_EVP_DIGESTUPDATE_VOID
128#  define EVP_DigestUpdate(a,b,c)	ssh_EVP_DigestUpdate((a),(b),(c))
129#  endif
130
131# ifdef USE_OPENSSL_ENGINE
132#  ifdef OpenSSL_add_all_algorithms
133#   undef OpenSSL_add_all_algorithms
134#  endif
135#  define OpenSSL_add_all_algorithms()  ssh_OpenSSL_add_all_algorithms()
136# endif
137
138# ifndef HAVE_BN_IS_PRIME_EX
139int BN_is_prime_ex(const BIGNUM *, int, BN_CTX *, void *);
140# endif
141
142# ifndef HAVE_DSA_GENERATE_PARAMETERS_EX
143int DSA_generate_parameters_ex(DSA *, int, const unsigned char *, int, int *,
144    unsigned long *, void *);
145# endif
146
147# ifndef HAVE_RSA_GENERATE_KEY_EX
148int RSA_generate_key_ex(RSA *, int, BIGNUM *, void *);
149# endif
150
151# ifndef HAVE_EVP_DIGESTINIT_EX
152int EVP_DigestInit_ex(EVP_MD_CTX *, const EVP_MD *, void *);
153# endif
154
155# ifndef HAVE_EVP_DISESTFINAL_EX
156int EVP_DigestFinal_ex(EVP_MD_CTX *, unsigned char *, unsigned int *);
157# endif
158
159# ifndef EVP_MD_CTX_COPY_EX
160int EVP_MD_CTX_copy_ex(EVP_MD_CTX *, const EVP_MD_CTX *);
161# endif
162
163int ssh_EVP_CipherInit(EVP_CIPHER_CTX *, const EVP_CIPHER *, unsigned char *,
164    unsigned char *, int);
165int ssh_EVP_Cipher(EVP_CIPHER_CTX *, char *, char *, int);
166int ssh_EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *);
167void ssh_OpenSSL_add_all_algorithms(void);
168
169# ifndef HAVE_HMAC_CTX_INIT
170#  define HMAC_CTX_init(a)
171# endif
172
173# ifndef HAVE_EVP_MD_CTX_INIT
174#  define EVP_MD_CTX_init(a)
175# endif
176
177# ifndef HAVE_EVP_MD_CTX_CLEANUP
178#  define EVP_MD_CTX_cleanup(a)
179# endif
180
181#endif	/* SSH_DONT_OVERLOAD_OPENSSL_FUNCS */
182
183