crypto/evp/evp_locl.h

   1 /* evp_locl.h */
   2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
   3  * project 2000.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 /* Macros to code block cipher wrappers */
  60
  61 /* Wrapper functions for each cipher mode */
  62
  63 #define BLOCK_CIPHER_ecb_loop() \
  64         unsigned int i; \
  65         if(inl < 8) return 1;\
  66         inl -= 8; \
  67         for(i=0; i <= inl; i+=8) \
  68
  69 #define BLOCK_CIPHER_func_ecb(cname, cprefix, kname) \
  70 static int cname##_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, unsigned int inl) \
  71 {\
  72         BLOCK_CIPHER_ecb_loop() \
  73                 cprefix##_ecb_encrypt(in + i, out + i, &ctx->c.kname, ctx->encrypt);\
  74         return 1;\
  75 }
  76
  77 #define BLOCK_CIPHER_func_ofb(cname, cprefix, kname) \
  78 static int cname##_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, unsigned int inl) \
  79 {\
  80         cprefix##_ofb64_encrypt(in, out, (long)inl, &ctx->c.kname, ctx->iv, &ctx->num);\
  81         return 1;\
  82 }
  83
  84 #define BLOCK_CIPHER_func_cbc(cname, cprefix, kname) \
  85 static int cname##_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, unsigned int inl) \
  86 {\
  87         cprefix##_cbc_encrypt(in, out, (long)inl, &ctx->c.kname, ctx->iv, ctx->encrypt);\
  88         return 1;\
  89 }
  90
  91 #define BLOCK_CIPHER_func_cfb(cname, cprefix, kname) \
  92 static int cname##_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, unsigned int inl) \
  93 {\
  94         cprefix##_cfb64_encrypt(in, out, (long)inl, &ctx->c.kname, ctx->iv, &ctx->num, ctx->encrypt);\
  95         return 1;\
  96 }
  97
  98 #define BLOCK_CIPHER_all_funcs(cname, cprefix, kname) \
  99         BLOCK_CIPHER_func_cbc(cname, cprefix, kname) \
 100         BLOCK_CIPHER_func_cfb(cname, cprefix, kname) \
 101         BLOCK_CIPHER_func_ecb(cname, cprefix, kname) \
 102         BLOCK_CIPHER_func_ofb(cname, cprefix, kname)
 103
 104 #define BLOCK_CIPHER_defs(cname, kstruct, \
 105                                 nid, block_size, key_len, iv_len, flags,\
 106                                  init_key, cleanup, set_asn1, get_asn1, ctrl)\
 107 static const EVP_CIPHER cname##_cbc = {\
 108         nid##_cbc, block_size, key_len, iv_len, \
 109         flags | EVP_CIPH_CBC_MODE,\
 110         init_key,\
 111         cname##_cbc_cipher,\
 112         cleanup,\
 113         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 114                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 115         set_asn1, get_asn1,\
 116         ctrl, \
 117         NULL \
 118 };\
 119 const EVP_CIPHER *EVP_##cname##_cbc(void) { return &cname##_cbc; }\
 120 static const EVP_CIPHER cname##_cfb = {\
 121         nid##_cfb64, 1, key_len, iv_len, \
 122         flags | EVP_CIPH_CFB_MODE,\
 123         init_key,\
 124         cname##_cfb_cipher,\
 125         cleanup,\
 126         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 127                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 128         set_asn1, get_asn1,\
 129         ctrl,\
 130         NULL \
 131 };\
 132 const EVP_CIPHER *EVP_##cname##_cfb(void) { return &cname##_cfb; }\
 133 static const EVP_CIPHER cname##_ofb = {\
 134         nid##_ofb64, 1, key_len, iv_len, \
 135         flags | EVP_CIPH_OFB_MODE,\
 136         init_key,\
 137         cname##_ofb_cipher,\
 138         cleanup,\
 139         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 140                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 141         set_asn1, get_asn1,\
 142         ctrl,\
 143         NULL \
 144 };\
 145 const EVP_CIPHER *EVP_##cname##_ofb(void) { return &cname##_ofb; }\
 146 static const EVP_CIPHER cname##_ecb = {\
 147         nid##_ecb, block_size, key_len, iv_len, \
 148         flags | EVP_CIPH_ECB_MODE,\
 149         init_key,\
 150         cname##_ecb_cipher,\
 151         cleanup,\
 152         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 153                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 154         set_asn1, get_asn1,\
 155         ctrl,\
 156         NULL \
 157 };\
 158 const EVP_CIPHER *EVP_##cname##_ecb(void) { return &cname##_ecb; }
 159
 160
 161
 162 #define IMPLEMENT_BLOCK_CIPHER(cname, kname, cprefix, kstruct, \
 163                                 nid, block_size, key_len, iv_len, flags, \
 164                                  init_key, cleanup, set_asn1, get_asn1, ctrl) \
 165         BLOCK_CIPHER_all_funcs(cname, cprefix, kname) \
 166         BLOCK_CIPHER_defs(cname, kstruct, nid, block_size, key_len, iv_len, flags,\
 167                  init_key, cleanup, set_asn1, get_asn1, ctrl)
 168