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 62 const EVP_CIPHER *evp_rijndael(void); 63 void 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 70 const EVP_CIPHER *evp_aes_128_ctr(void); 71 void 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 105 RSA_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 139 int BN_is_prime_ex(const BIGNUM *, int, BN_CTX *, void *); 140 # endif 141 142 # ifndef HAVE_DSA_GENERATE_PARAMETERS_EX 143 int 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 148 int RSA_generate_key_ex(RSA *, int, BIGNUM *, void *); 149 # endif 150 151 # ifndef HAVE_EVP_DIGESTINIT_EX 152 int EVP_DigestInit_ex(EVP_MD_CTX *, const EVP_MD *, void *); 153 # endif 154 155 # ifndef HAVE_EVP_DISESTFINAL_EX 156 int EVP_DigestFinal_ex(EVP_MD_CTX *, unsigned char *, unsigned int *); 157 # endif 158 159 # ifndef EVP_MD_CTX_COPY_EX 160 int EVP_MD_CTX_copy_ex(EVP_MD_CTX *, const EVP_MD_CTX *); 161 # endif 162 163 int ssh_EVP_CipherInit(EVP_CIPHER_CTX *, const EVP_CIPHER *, unsigned char *, 164 unsigned char *, int); 165 int ssh_EVP_Cipher(EVP_CIPHER_CTX *, char *, char *, int); 166 int ssh_EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *); 167 void 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