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     {
  78     DES_key_schedule ks1;/* key schedule */
  79     DES_key_schedule ks2;/* key schedule (for ede) */
  80     DES_key_schedule ks3;/* key schedule (for ede3) */
  81     } DES_EDE_KEY;
  82
  83 #define data(ctx) ((DES_EDE_KEY *)(ctx)->cipher_data)
  84
  85 /* Because of various casts and different args can't use IMPLEMENT_BLOCK_CIPHER */
  86
  87 static int des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
  88                               const unsigned char *in, size_t inl)
  89 {
  90         BLOCK_CIPHER_ecb_loop()
  91                 DES_ecb3_encrypt((const_DES_cblock *)(in + i),
  92                                  (DES_cblock *)(out + i),
  93                                  &data(ctx)->ks1, &data(ctx)->ks2,
  94                                  &data(ctx)->ks3,
  95                                  ctx->encrypt);
  96         return 1;
  97 }
  98
  99 static int des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 100                               const unsigned char *in, size_t inl)
 101 {
 102         if (inl>=EVP_MAXCHUNK)
 103                 {
 104                 DES_ede3_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK,
 105                                &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
 106                                (DES_cblock *)ctx->iv, &ctx->num);
 107                 inl-=EVP_MAXCHUNK;
 108                 in +=EVP_MAXCHUNK;
 109                 out+=EVP_MAXCHUNK;
 110                 }
 111         if (inl)
 112                 DES_ede3_ofb64_encrypt(in, out, (long)inl,
 113                                 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
 114                                (DES_cblock *)ctx->iv, &ctx->num);
 115
 116         return 1;
 117 }
 118
 119 static int des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 120                               const unsigned char *in, size_t inl)
 121 {
 122 #ifdef KSSL_DEBUG
 123         {
 124         int i;
 125         char *cp;
 126         printf("des_ede_cbc_cipher(ctx=%lx, buflen=%d)\n", ctx, ctx->buf_len);
 127         printf("\t iv= ");
 128         for(i=0;i<8;i++)
 129                 printf("%02X",ctx->iv[i]);
 130         printf("\n");
 131         }
 132 #endif    /* KSSL_DEBUG */
 133         if (inl>=EVP_MAXCHUNK)
 134                 {
 135                 DES_ede3_cbc_encrypt(in, out, (long)EVP_MAXCHUNK,
 136                              &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
 137                              (DES_cblock *)ctx->iv, ctx->encrypt);
 138                 inl-=EVP_MAXCHUNK;
 139                 in +=EVP_MAXCHUNK;
 140                 out+=EVP_MAXCHUNK;
 141                 }
 142         if (inl)
 143                 DES_ede3_cbc_encrypt(in, out, (long)inl,
 144                              &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
 145                              (DES_cblock *)ctx->iv, ctx->encrypt);
 146         return 1;
 147 }
 148
 149 static int des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 150                               const unsigned char *in, size_t inl)
 151 {
 152         if (inl>=EVP_MAXCHUNK)
 153                 {
 154                 DES_ede3_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK,
 155                                &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
 156                                (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
 157                 inl-=EVP_MAXCHUNK;
 158                 in +=EVP_MAXCHUNK;
 159                 out+=EVP_MAXCHUNK;
 160                 }
 161         if (inl)
 162                 DES_ede3_cfb64_encrypt(in, out, (long)inl,
 163                                &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
 164                                (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
 165         return 1;
 166 }
 167
 168 /* Although we have a CFB-r implementation for 3-DES, it doesn't pack the right
 169    way, so wrap it here */
 170 static int des_ede3_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 171                                 const unsigned char *in, size_t inl)
 172     {
 173     size_t n;
 174     unsigned char c[1],d[1];
 175
 176     for(n=0 ; n < inl ; ++n)
 177         {
 178         c[0]=(in[n/8]&(1 << (7-n%8))) ? 0x80 : 0;
 179         DES_ede3_cfb_encrypt(c,d,1,1,
 180                              &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3,
 181                              (DES_cblock *)ctx->iv,ctx->encrypt);
 182         out[n/8]=(out[n/8]&~(0x80 >> (n%8)))|((d[0]&0x80) >> (n%8));
 183         }
 184
 185     return 1;
 186     }
 187
 188 static int des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 189                                 const unsigned char *in, size_t inl)
 190     {
 191     while (inl>=EVP_MAXCHUNK)
 192         {
 193         DES_ede3_cfb_encrypt(in,out,8,(long)EVP_MAXCHUNK,
 194                          &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3,
 195                          (DES_cblock *)ctx->iv,ctx->encrypt);
 196         inl-=EVP_MAXCHUNK;
 197         in +=EVP_MAXCHUNK;
 198         out+=EVP_MAXCHUNK;
 199         }
 200     if (inl)
 201         DES_ede3_cfb_encrypt(in,out,8,(long)inl,
 202                         &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3,
 203                         (DES_cblock *)ctx->iv,ctx->encrypt);
 204     return 1;
 205     }
 206
 207 BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64,
 208                         EVP_CIPH_RAND_KEY, des_ede_init_key, NULL,
 209                         EVP_CIPHER_set_asn1_iv,
 210                         EVP_CIPHER_get_asn1_iv,
 211                         des3_ctrl)
 212
 213 #define des_ede3_cfb64_cipher des_ede_cfb64_cipher
 214 #define des_ede3_ofb_cipher des_ede_ofb_cipher
 215 #define des_ede3_cbc_cipher des_ede_cbc_cipher
 216 #define des_ede3_ecb_cipher des_ede_ecb_cipher
 217
 218 BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64,
 219                         EVP_CIPH_RAND_KEY, des_ede3_init_key, NULL,
 220                         EVP_CIPHER_set_asn1_iv,
 221                         EVP_CIPHER_get_asn1_iv,
 222                         des3_ctrl)
 223
 224 BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,1,
 225                      EVP_CIPH_RAND_KEY, des_ede3_init_key,NULL,
 226                      EVP_CIPHER_set_asn1_iv,
 227                      EVP_CIPHER_get_asn1_iv,
 228                      des3_ctrl)
 229
 230 BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,8,
 231                      EVP_CIPH_RAND_KEY, des_ede3_init_key,NULL,
 232                      EVP_CIPHER_set_asn1_iv,
 233                      EVP_CIPHER_get_asn1_iv,
 234                      des3_ctrl)
 235
 236 static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 237                             const unsigned char *iv, int enc)
 238         {
 239         DES_cblock *deskey = (DES_cblock *)key;
 240 #ifdef EVP_CHECK_DES_KEY
 241         if (DES_set_key_checked(&deskey[0],&data(ctx)->ks1)
 242                 !! DES_set_key_checked(&deskey[1],&data(ctx)->ks2))
 243                 return 0;
 244 #else
 245         DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1);
 246         DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2);
 247 #endif
 248         memcpy(&data(ctx)->ks3,&data(ctx)->ks1,
 249                sizeof(data(ctx)->ks1));
 250         return 1;
 251         }
 252
 253 static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 254                              const unsigned char *iv, int enc)
 255         {
 256         DES_cblock *deskey = (DES_cblock *)key;
 257 #ifdef KSSL_DEBUG
 258         {
 259         int i;
 260         printf("des_ede3_init_key(ctx=%lx)\n", ctx);
 261         printf("\tKEY= ");
 262         for(i=0;i<24;i++) printf("%02X",key[i]); printf("\n");
 263         printf("\t IV= ");
 264         for(i=0;i<8;i++) printf("%02X",iv[i]); printf("\n");
 265         }
 266 #endif  /* KSSL_DEBUG */
 267
 268 #ifdef EVP_CHECK_DES_KEY
 269         if (DES_set_key_checked(&deskey[0],&data(ctx)->ks1)
 270                 || DES_set_key_checked(&deskey[1],&data(ctx)->ks2)
 271                 || DES_set_key_checked(&deskey[2],&data(ctx)->ks3))
 272                 return 0;
 273 #else
 274         DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1);
 275         DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2);
 276         DES_set_key_unchecked(&deskey[2],&data(ctx)->ks3);
 277 #endif
 278         return 1;
 279         }
 280
 281 static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
 282         {
 283
 284         DES_cblock *deskey = ptr;
 285
 286         switch(type)
 287                 {
 288         case EVP_CTRL_RAND_KEY:
 289                 if (RAND_bytes(ptr, c->key_len) <= 0)
 290                         return 0;
 291                 DES_set_odd_parity(deskey);
 292                 if (c->key_len >= 16)
 293                         DES_set_odd_parity(deskey + 1);
 294                 if (c->key_len >= 24)
 295                         DES_set_odd_parity(deskey + 2);
 296                 return 1;
 297
 298         default:
 299                 return -1;
 300                 }
 301         }
 302
 303 const EVP_CIPHER *EVP_des_ede(void)
 304 {
 305         return &des_ede_ecb;
 306 }
 307
 308 const EVP_CIPHER *EVP_des_ede3(void)
 309 {
 310         return &des_ede3_ecb;
 311 }
 312 #endif