openbsd-compat/openssl-compat.h

   1 /* $Id: openssl-compat.h,v 1.14 2009/03/07 11:22:35 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/evp.h>
  21
  22 /* OPENSSL_free() is Free() in versions before OpenSSL 0.9.6 */
  23 #if !defined(OPENSSL_VERSION_NUMBER) || (OPENSSL_VERSION_NUMBER < 0x0090600f)
  24 # define OPENSSL_free(x) Free(x)
  25 #endif
  26
  27 #if OPENSSL_VERSION_NUMBER < 0x00906000L
  28 # define SSH_OLD_EVP
  29 # define EVP_CIPHER_CTX_get_app_data(e)         ((e)->app_data)
  30 #endif
  31
  32 #if (OPENSSL_VERSION_NUMBER < 0x00907000L) || defined(OPENSSL_LOBOTOMISED_AES)
  33 # define USE_BUILTIN_RIJNDAEL
  34 #endif
  35
  36 #ifdef USE_BUILTIN_RIJNDAEL
  37 # include "rijndael.h"
  38 # define AES_KEY rijndael_ctx
  39 # define AES_BLOCK_SIZE 16
  40 # define AES_encrypt(a, b, c)           rijndael_encrypt(c, a, b)
  41 # define AES_set_encrypt_key(a, b, c)   rijndael_set_key(c, (char *)a, b, 1)
  42 # define EVP_aes_128_cbc evp_rijndael
  43 # define EVP_aes_192_cbc evp_rijndael
  44 # define EVP_aes_256_cbc evp_rijndael
  45 extern const EVP_CIPHER *evp_rijndael(void);
  46 extern void ssh_rijndael_iv(EVP_CIPHER_CTX *, int, u_char *, u_int);
  47 #endif
  48
  49 #if !defined(EVP_CTRL_SET_ACSS_MODE)
  50 # if (OPENSSL_VERSION_NUMBER >= 0x00907000L)
  51 #  define USE_CIPHER_ACSS 1
  52 extern const EVP_CIPHER *evp_acss(void);
  53 #  define EVP_acss evp_acss
  54 # else
  55 #  define EVP_acss NULL
  56 # endif
  57 #endif
  58
  59 /* OpenSSL 0.9.8e returns cipher key len not context key len */
  60 #if (OPENSSL_VERSION_NUMBER == 0x0090805fL)
  61 # define EVP_CIPHER_CTX_key_length(c) ((c)->key_len)
  62 #endif
  63
  64 /*
  65  * We overload some of the OpenSSL crypto functions with ssh_* equivalents
  66  * which cater for older and/or less featureful OpenSSL version.
  67  *
  68  * In order for the compat library to call the real functions, it must
  69  * define SSH_DONT_OVERLOAD_OPENSSL_FUNCS before including this file and
  70  * implement the ssh_* equivalents.
  71  */
  72 #ifndef SSH_DONT_OVERLOAD_OPENSSL_FUNCS
  73
  74 # ifdef SSH_OLD_EVP
  75 #  ifdef EVP_Cipher
  76 #   undef EVP_Cipher
  77 #  endif
  78 #  define EVP_CipherInit(a,b,c,d,e)     ssh_EVP_CipherInit((a),(b),(c),(d),(e))
  79 #  define EVP_Cipher(a,b,c,d)           ssh_EVP_Cipher((a),(b),(c),(d))
  80 #  define EVP_CIPHER_CTX_cleanup(a)     ssh_EVP_CIPHER_CTX_cleanup((a))
  81 # endif /* SSH_OLD_EVP */
  82
  83 # ifdef OPENSSL_EVP_DIGESTUPDATE_VOID
  84 #  define EVP_DigestUpdate(a,b,c)       ssh_EVP_DigestUpdate((a),(b),(c))
  85 #  endif
  86
  87 # ifdef USE_OPENSSL_ENGINE
  88 #  ifdef SSLeay_add_all_algorithms
  89 #   undef SSLeay_add_all_algorithms
  90 #  endif
  91 #  define SSLeay_add_all_algorithms()  ssh_SSLeay_add_all_algorithms()
  92 # endif
  93
  94 int ssh_EVP_CipherInit(EVP_CIPHER_CTX *, const EVP_CIPHER *, unsigned char *,
  95     unsigned char *, int);
  96 int ssh_EVP_Cipher(EVP_CIPHER_CTX *, char *, char *, int);
  97 int ssh_EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *);
  98 void ssh_SSLeay_add_all_algorithms(void);
  99 #endif  /* SSH_DONT_OVERLOAD_OPENSSL_FUNCS */