crypto/evp/e_des3.c

   1 /* crypto/evp/e_des3.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #include <stdio.h>
  60 #include "cryptlib.h"
  61 #ifndef OPENSSL_NO_DES
  62 # include <openssl/evp.h>
  63 # include <openssl/objects.h>
  64 # include "evp_locl.h"
  65 # include <openssl/des.h>
  66 # include <openssl/rand.h>
  67
  68 static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
  69                             const unsigned char *iv, int enc);
  70
  71 static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
  72                              const unsigned char *iv, int enc);
  73
  74 static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
  75
  76 typedef struct {
  77     DES_key_schedule ks1;       /* key schedule */
  78     DES_key_schedule ks2;       /* key schedule (for ede) */
  79     DES_key_schedule ks3;       /* key schedule (for ede3) */
  80 } DES_EDE_KEY;
  81
  82 # define data(ctx) ((DES_EDE_KEY *)(ctx)->cipher_data)
  83
  84 /*
  85  * Because of various casts and different args can't use
  86  * IMPLEMENT_BLOCK_CIPHER
  87  */
  88
  89 static int des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
  90                               const unsigned char *in, unsigned int inl)
  91 {
  92     BLOCK_CIPHER_ecb_loop()
  93         DES_ecb3_encrypt((const_DES_cblock *)(in + i),
  94                          (DES_cblock *)(out + i),
  95                          &data(ctx)->ks1, &data(ctx)->ks2,
  96                          &data(ctx)->ks3, ctx->encrypt);
  97     return 1;
  98 }
  99
 100 static int des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 101                               const unsigned char *in, unsigned int inl)
 102 {
 103     DES_ede3_ofb64_encrypt(in, out, (long)inl,
 104                            &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
 105                            (DES_cblock *)ctx->iv, &ctx->num);
 106     return 1;
 107 }
 108
 109 static int des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 110                               const unsigned char *in, unsigned int inl)
 111 {
 112 # ifdef KSSL_DEBUG
 113     {
 114         int i;
 115         printf("des_ede_cbc_cipher(ctx=%lx, buflen=%d)\n", (unsigned long)ctx,
 116                ctx->buf_len);
 117         printf("\t iv= ");
 118         for (i = 0; i < 8; i++)
 119             printf("%02X", ctx->iv[i]);
 120         printf("\n");
 121     }
 122 # endif                         /* KSSL_DEBUG */
 123     DES_ede3_cbc_encrypt(in, out, (long)inl,
 124                          &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
 125                          (DES_cblock *)ctx->iv, ctx->encrypt);
 126     return 1;
 127 }
 128
 129 static int des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 130                                 const unsigned char *in, unsigned int inl)
 131 {
 132     DES_ede3_cfb64_encrypt(in, out, (long)inl,
 133                            &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
 134                            (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
 135     return 1;
 136 }
 137
 138 /*
 139  * Although we have a CFB-r implementation for 3-DES, it doesn't pack the
 140  * right way, so wrap it here
 141  */
 142 static int des_ede3_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 143                                 const unsigned char *in, unsigned int inl)
 144 {
 145     unsigned int n;
 146     unsigned char c[1], d[1];
 147
 148     for (n = 0; n < inl; ++n) {
 149         c[0] = (in[n / 8] & (1 << (7 - n % 8))) ? 0x80 : 0;
 150         DES_ede3_cfb_encrypt(c, d, 1, 1,
 151                              &data(ctx)->ks1, &data(ctx)->ks2,
 152                              &data(ctx)->ks3, (DES_cblock *)ctx->iv,
 153                              ctx->encrypt);
 154         out[n / 8] =
 155             (out[n / 8] & ~(0x80 >> (n % 8))) | ((d[0] & 0x80) >> (n % 8));
 156     }
 157
 158     return 1;
 159 }
 160
 161 static int des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 162                                 const unsigned char *in, unsigned int inl)
 163 {
 164     DES_ede3_cfb_encrypt(in, out, 8, inl,
 165                          &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
 166                          (DES_cblock *)ctx->iv, ctx->encrypt);
 167     return 1;
 168 }
 169
 170 BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64,
 171                   EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_FIPS |
 172                   EVP_CIPH_FLAG_DEFAULT_ASN1, des_ede_init_key, NULL, NULL,
 173                   NULL, des3_ctrl)
 174 # define des_ede3_cfb64_cipher des_ede_cfb64_cipher
 175 # define des_ede3_ofb_cipher des_ede_ofb_cipher
 176 # define des_ede3_cbc_cipher des_ede_cbc_cipher
 177 # define des_ede3_ecb_cipher des_ede_ecb_cipher
 178     BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64,
 179                   EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_FIPS |
 180                   EVP_CIPH_FLAG_DEFAULT_ASN1, des_ede3_init_key, NULL, NULL, NULL,
 181                   des3_ctrl)
 182
 183     BLOCK_CIPHER_def_cfb(des_ede3, DES_EDE_KEY, NID_des_ede3, 24, 8, 1,
 184                      EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_FIPS |
 185                      EVP_CIPH_FLAG_DEFAULT_ASN1, des_ede3_init_key, NULL, NULL,
 186                      NULL, des3_ctrl)
 187
 188     BLOCK_CIPHER_def_cfb(des_ede3, DES_EDE_KEY, NID_des_ede3, 24, 8, 8,
 189                      EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_FIPS |
 190                      EVP_CIPH_FLAG_DEFAULT_ASN1, des_ede3_init_key, NULL, NULL,
 191                      NULL, des3_ctrl)
 192
 193 static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 194                             const unsigned char *iv, int enc)
 195 {
 196     DES_cblock *deskey = (DES_cblock *)key;
 197 # ifdef EVP_CHECK_DES_KEY
 198     if (DES_set_key_checked(&deskey[0], &data(ctx)->ks1)
 199         || DES_set_key_checked(&deskey[1], &data(ctx)->ks2))
 200         return 0;
 201 # else
 202     DES_set_key_unchecked(&deskey[0], &data(ctx)->ks1);
 203     DES_set_key_unchecked(&deskey[1], &data(ctx)->ks2);
 204 # endif
 205     memcpy(&data(ctx)->ks3, &data(ctx)->ks1, sizeof(data(ctx)->ks1));
 206     return 1;
 207 }
 208
 209 static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 210                              const unsigned char *iv, int enc)
 211 {
 212     DES_cblock *deskey = (DES_cblock *)key;
 213 # ifdef KSSL_DEBUG
 214     {
 215         int i;
 216         printf("des_ede3_init_key(ctx=%lx)\n", (unsigned long)ctx);
 217         printf("\tKEY= ");
 218         for (i = 0; i < 24; i++)
 219             printf("%02X", key[i]);
 220         printf("\n");
 221         printf("\t IV= ");
 222         for (i = 0; i < 8; i++)
 223             printf("%02X", iv[i]);
 224         printf("\n");
 225     }
 226 # endif                         /* KSSL_DEBUG */
 227
 228 # ifdef EVP_CHECK_DES_KEY
 229     if (DES_set_key_checked(&deskey[0], &data(ctx)->ks1)
 230         || DES_set_key_checked(&deskey[1], &data(ctx)->ks2)
 231         || DES_set_key_checked(&deskey[2], &data(ctx)->ks3))
 232         return 0;
 233 # else
 234     DES_set_key_unchecked(&deskey[0], &data(ctx)->ks1);
 235     DES_set_key_unchecked(&deskey[1], &data(ctx)->ks2);
 236     DES_set_key_unchecked(&deskey[2], &data(ctx)->ks3);
 237 # endif
 238     return 1;
 239 }
 240
 241 static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
 242 {
 243
 244     DES_cblock *deskey = ptr;
 245
 246     switch (type) {
 247     case EVP_CTRL_RAND_KEY:
 248         if (RAND_bytes(ptr, c->key_len) <= 0)
 249             return 0;
 250         DES_set_odd_parity(deskey);
 251         if (c->key_len >= 16)
 252             DES_set_odd_parity(deskey + 1);
 253         if (c->key_len >= 24)
 254             DES_set_odd_parity(deskey + 2);
 255         return 1;
 256
 257     default:
 258         return -1;
 259     }
 260 }
 261
 262 const EVP_CIPHER *EVP_des_ede(void)
 263 {
 264     return &des_ede_ecb;
 265 }
 266
 267 const EVP_CIPHER *EVP_des_ede3(void)
 268 {
 269     return &des_ede3_ecb;
 270 }
 271 #endif