1/* $Id: openssl-compat.h,v 1.24 2013/02/12 00:00:40 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#include "includes.h"
20#ifdef __APPLE_CRYPTO__
21#include "ossl-crypto.h"
22#include "ossl-evp.h"
23#include "ossl-rsa.h"
24#include "ossl-dsa.h"
25#else
26#include <openssl/opensslv.h>
27#include <openssl/evp.h>
28#include <openssl/rsa.h>
29#include <openssl/dsa.h>
30#endif
31
32/* Only in 0.9.8 */
33#ifndef OPENSSL_DSA_MAX_MODULUS_BITS
34# define OPENSSL_DSA_MAX_MODULUS_BITS        10000
35#endif
36#ifndef OPENSSL_RSA_MAX_MODULUS_BITS
37# define OPENSSL_RSA_MAX_MODULUS_BITS        16384
38#endif
39
40/* OPENSSL_free() is Free() in versions before OpenSSL 0.9.6 */
41#if !defined(OPENSSL_VERSION_NUMBER) || (OPENSSL_VERSION_NUMBER < 0x0090600f)
42# define OPENSSL_free(x) Free(x)
43#endif
44
45#if OPENSSL_VERSION_NUMBER < 0x00906000L
46# define SSH_OLD_EVP
47# define EVP_CIPHER_CTX_get_app_data(e)		((e)->app_data)
48#endif
49
50#if OPENSSL_VERSION_NUMBER < 0x10000001L
51# define LIBCRYPTO_EVP_INL_TYPE unsigned int
52#else
53# define LIBCRYPTO_EVP_INL_TYPE size_t
54#endif
55
56#if (OPENSSL_VERSION_NUMBER < 0x00907000L) || defined(OPENSSL_LOBOTOMISED_AES)
57# define USE_BUILTIN_RIJNDAEL
58#endif
59
60#ifdef USE_BUILTIN_RIJNDAEL
61# include "rijndael.h"
62# define AES_KEY rijndael_ctx
63# define AES_BLOCK_SIZE 16
64# define AES_encrypt(a, b, c)		rijndael_encrypt(c, a, b)
65# define AES_set_encrypt_key(a, b, c)	rijndael_set_key(c, (char *)a, b, 1)
66# define EVP_aes_128_cbc evp_rijndael
67# define EVP_aes_192_cbc evp_rijndael
68# define EVP_aes_256_cbc evp_rijndael
69const EVP_CIPHER *evp_rijndael(void);
70void ssh_rijndael_iv(EVP_CIPHER_CTX *, int, u_char *, u_int);
71#endif
72
73#ifndef OPENSSL_HAVE_EVPCTR
74#define EVP_aes_128_ctr evp_aes_128_ctr
75#define EVP_aes_192_ctr evp_aes_128_ctr
76#define EVP_aes_256_ctr evp_aes_128_ctr
77const EVP_CIPHER *evp_aes_128_ctr(void);
78void ssh_aes_ctr_iv(EVP_CIPHER_CTX *, int, u_char *, size_t);
79#endif
80
81/* Avoid some #ifdef. Code that uses these is unreachable without GCM */
82#if !defined(OPENSSL_HAVE_EVPGCM) && !defined(EVP_CTRL_GCM_SET_IV_FIXED)
83# define EVP_CTRL_GCM_SET_IV_FIXED -1
84# define EVP_CTRL_GCM_IV_GEN -1
85# define EVP_CTRL_GCM_SET_TAG -1
86# define EVP_CTRL_GCM_GET_TAG -1
87#endif
88
89/* Replace missing EVP_CIPHER_CTX_ctrl() with something that returns failure */
90#ifndef HAVE_EVP_CIPHER_CTX_CTRL
91# ifdef OPENSSL_HAVE_EVPGCM
92#  error AES-GCM enabled without EVP_CIPHER_CTX_ctrl /* shouldn't happen */
93# else
94# define EVP_CIPHER_CTX_ctrl(a,b,c,d) (0)
95# endif
96#endif
97
98#if OPENSSL_VERSION_NUMBER < 0x00907000L
99#define EVP_X_STATE(evp)	&(evp).c
100#define EVP_X_STATE_LEN(evp)	sizeof((evp).c)
101#else
102#define EVP_X_STATE(evp)	(evp).cipher_data
103#define EVP_X_STATE_LEN(evp)	(evp).cipher->ctx_size
104#endif
105
106/* OpenSSL 0.9.8e returns cipher key len not context key len */
107#if (OPENSSL_VERSION_NUMBER == 0x0090805fL)
108# define EVP_CIPHER_CTX_key_length(c) ((c)->key_len)
109#endif
110
111#ifndef HAVE_RSA_GET_DEFAULT_METHOD
112RSA_METHOD *RSA_get_default_method(void);
113#endif
114
115/*
116 * We overload some of the OpenSSL crypto functions with ssh_* equivalents
117 * which cater for older and/or less featureful OpenSSL version.
118 *
119 * In order for the compat library to call the real functions, it must
120 * define SSH_DONT_OVERLOAD_OPENSSL_FUNCS before including this file and
121 * implement the ssh_* equivalents.
122 */
123#ifndef SSH_DONT_OVERLOAD_OPENSSL_FUNCS
124
125# ifdef SSH_OLD_EVP
126#  ifdef EVP_Cipher
127#   undef EVP_Cipher
128#  endif
129#  define EVP_CipherInit(a,b,c,d,e)	ssh_EVP_CipherInit((a),(b),(c),(d),(e))
130#  define EVP_Cipher(a,b,c,d)		ssh_EVP_Cipher((a),(b),(c),(d))
131#  define EVP_CIPHER_CTX_cleanup(a)	ssh_EVP_CIPHER_CTX_cleanup((a))
132# endif /* SSH_OLD_EVP */
133
134# ifdef OPENSSL_EVP_DIGESTUPDATE_VOID
135#  define EVP_DigestUpdate(a,b,c)	ssh_EVP_DigestUpdate((a),(b),(c))
136#  endif
137
138# ifdef USE_OPENSSL_ENGINE
139#  ifdef OpenSSL_add_all_algorithms
140#   undef OpenSSL_add_all_algorithms
141#  endif
142#  define OpenSSL_add_all_algorithms()  ssh_OpenSSL_add_all_algorithms()
143# endif
144
145# ifndef HAVE_BN_IS_PRIME_EX
146int BN_is_prime_ex(const BIGNUM *, int, BN_CTX *, void *);
147# endif
148
149# ifndef HAVE_DSA_GENERATE_PARAMETERS_EX
150int DSA_generate_parameters_ex(DSA *, int, const unsigned char *, int, int *,
151    unsigned long *, void *);
152# endif
153
154# ifndef HAVE_RSA_GENERATE_KEY_EX
155int RSA_generate_key_ex(RSA *, int, BIGNUM *, void *);
156# endif
157
158int ssh_EVP_CipherInit(EVP_CIPHER_CTX *, const EVP_CIPHER *, unsigned char *,
159    unsigned char *, int);
160int ssh_EVP_Cipher(EVP_CIPHER_CTX *, char *, char *, int);
161int ssh_EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *);
162void ssh_OpenSSL_add_all_algorithms(void);
163
164# ifndef HAVE_HMAC_CTX_INIT
165#  define HMAC_CTX_init(a)
166# endif
167
168#endif	/* SSH_DONT_OVERLOAD_OPENSSL_FUNCS */
169
170