release/src/router/openssl/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 #ifndef OPENSSL_FIPS
  69
  70 static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
  71                             const unsigned char *iv,int enc);
  72
  73 static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
  74                              const unsigned char *iv,int enc);
  75
  76 static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
  77
  78 typedef struct
  79     {
  80     DES_key_schedule ks1;/* key schedule */
  81     DES_key_schedule ks2;/* key schedule (for ede) */
  82     DES_key_schedule ks3;/* key schedule (for ede3) */
  83     } DES_EDE_KEY;
  84
  85 #define data(ctx) ((DES_EDE_KEY *)(ctx)->cipher_data)
  86
  87 /* Because of various casts and different args can't use IMPLEMENT_BLOCK_CIPHER */
  88
  89 static int des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
  90                               const unsigned char *in, size_t 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,
  97                                  ctx->encrypt);
  98         return 1;
  99 }
 100
 101 static int des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 102                               const unsigned char *in, size_t inl)
 103 {
 104         if (inl>=EVP_MAXCHUNK)
 105                 {
 106                 DES_ede3_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK,
 107                                &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
 108                                (DES_cblock *)ctx->iv, &ctx->num);
 109                 inl-=EVP_MAXCHUNK;
 110                 in +=EVP_MAXCHUNK;
 111                 out+=EVP_MAXCHUNK;
 112                 }
 113         if (inl)
 114                 DES_ede3_ofb64_encrypt(in, out, (long)inl,
 115                                 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
 116                                (DES_cblock *)ctx->iv, &ctx->num);
 117
 118         return 1;
 119 }
 120
 121 static int des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 122                               const unsigned char *in, size_t inl)
 123 {
 124 #ifdef KSSL_DEBUG
 125         {
 126         int i;
 127         char *cp;
 128         printf("des_ede_cbc_cipher(ctx=%lx, buflen=%d)\n", ctx, ctx->buf_len);
 129         printf("\t iv= ");
 130         for(i=0;i<8;i++)
 131                 printf("%02X",ctx->iv[i]);
 132         printf("\n");
 133         }
 134 #endif    /* KSSL_DEBUG */
 135         if (inl>=EVP_MAXCHUNK)
 136                 {
 137                 DES_ede3_cbc_encrypt(in, out, (long)EVP_MAXCHUNK,
 138                              &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
 139                              (DES_cblock *)ctx->iv, ctx->encrypt);
 140                 inl-=EVP_MAXCHUNK;
 141                 in +=EVP_MAXCHUNK;
 142                 out+=EVP_MAXCHUNK;
 143                 }
 144         if (inl)
 145                 DES_ede3_cbc_encrypt(in, out, (long)inl,
 146                              &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
 147                              (DES_cblock *)ctx->iv, ctx->encrypt);
 148         return 1;
 149 }
 150
 151 static int des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 152                               const unsigned char *in, size_t inl)
 153 {
 154         if (inl>=EVP_MAXCHUNK)
 155                 {
 156                 DES_ede3_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK,
 157                                &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
 158                                (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
 159                 inl-=EVP_MAXCHUNK;
 160                 in +=EVP_MAXCHUNK;
 161                 out+=EVP_MAXCHUNK;
 162                 }
 163         if (inl)
 164                 DES_ede3_cfb64_encrypt(in, out, (long)inl,
 165                                &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
 166                                (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
 167         return 1;
 168 }
 169
 170 /* Although we have a CFB-r implementation for 3-DES, it doesn't pack the right
 171    way, so wrap it here */
 172 static int des_ede3_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 173                                 const unsigned char *in, size_t inl)
 174     {
 175     size_t n;
 176     unsigned char c[1],d[1];
 177
 178     for(n=0 ; n < inl ; ++n)
 179         {
 180         c[0]=(in[n/8]&(1 << (7-n%8))) ? 0x80 : 0;
 181         DES_ede3_cfb_encrypt(c,d,1,1,
 182                              &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3,
 183                              (DES_cblock *)ctx->iv,ctx->encrypt);
 184         out[n/8]=(out[n/8]&~(0x80 >> (unsigned int)(n%8))) |
 185                  ((d[0]&0x80) >> (unsigned int)(n%8));
 186         }
 187
 188     return 1;
 189     }
 190
 191 static int des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 192                                 const unsigned char *in, size_t inl)
 193     {
 194     while (inl>=EVP_MAXCHUNK)
 195         {
 196         DES_ede3_cfb_encrypt(in,out,8,(long)EVP_MAXCHUNK,
 197                          &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3,
 198                          (DES_cblock *)ctx->iv,ctx->encrypt);
 199         inl-=EVP_MAXCHUNK;
 200         in +=EVP_MAXCHUNK;
 201         out+=EVP_MAXCHUNK;
 202         }
 203     if (inl)
 204         DES_ede3_cfb_encrypt(in,out,8,(long)inl,
 205                         &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3,
 206                         (DES_cblock *)ctx->iv,ctx->encrypt);
 207     return 1;
 208     }
 209
 210 BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64,
 211                         EVP_CIPH_RAND_KEY, des_ede_init_key, NULL,
 212                         EVP_CIPHER_set_asn1_iv,
 213                         EVP_CIPHER_get_asn1_iv,
 214                         des3_ctrl)
 215
 216 #define des_ede3_cfb64_cipher des_ede_cfb64_cipher
 217 #define des_ede3_ofb_cipher des_ede_ofb_cipher
 218 #define des_ede3_cbc_cipher des_ede_cbc_cipher
 219 #define des_ede3_ecb_cipher des_ede_ecb_cipher
 220
 221 BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64,
 222                         EVP_CIPH_RAND_KEY, des_ede3_init_key, NULL,
 223                         EVP_CIPHER_set_asn1_iv,
 224                         EVP_CIPHER_get_asn1_iv,
 225                         des3_ctrl)
 226
 227 BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,1,
 228                      EVP_CIPH_RAND_KEY, des_ede3_init_key,NULL,
 229                      EVP_CIPHER_set_asn1_iv,
 230                      EVP_CIPHER_get_asn1_iv,
 231                      des3_ctrl)
 232
 233 BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,8,
 234                      EVP_CIPH_RAND_KEY, des_ede3_init_key,NULL,
 235                      EVP_CIPHER_set_asn1_iv,
 236                      EVP_CIPHER_get_asn1_iv,
 237                      des3_ctrl)
 238
 239 static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 240                             const unsigned char *iv, int enc)
 241         {
 242         DES_cblock *deskey = (DES_cblock *)key;
 243 #ifdef EVP_CHECK_DES_KEY
 244         if (DES_set_key_checked(&deskey[0],&data(ctx)->ks1)
 245                 !! DES_set_key_checked(&deskey[1],&data(ctx)->ks2))
 246                 return 0;
 247 #else
 248         DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1);
 249         DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2);
 250 #endif
 251         memcpy(&data(ctx)->ks3,&data(ctx)->ks1,
 252                sizeof(data(ctx)->ks1));
 253         return 1;
 254         }
 255
 256 static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 257                              const unsigned char *iv, int enc)
 258         {
 259         DES_cblock *deskey = (DES_cblock *)key;
 260 #ifdef KSSL_DEBUG
 261         {
 262         int i;
 263         printf("des_ede3_init_key(ctx=%lx)\n", ctx);
 264         printf("\tKEY= ");
 265         for(i=0;i<24;i++) printf("%02X",key[i]); printf("\n");
 266         printf("\t IV= ");
 267         for(i=0;i<8;i++) printf("%02X",iv[i]); printf("\n");
 268         }
 269 #endif  /* KSSL_DEBUG */
 270
 271 #ifdef EVP_CHECK_DES_KEY
 272         if (DES_set_key_checked(&deskey[0],&data(ctx)->ks1)
 273                 || DES_set_key_checked(&deskey[1],&data(ctx)->ks2)
 274                 || DES_set_key_checked(&deskey[2],&data(ctx)->ks3))
 275                 return 0;
 276 #else
 277         DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1);
 278         DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2);
 279         DES_set_key_unchecked(&deskey[2],&data(ctx)->ks3);
 280 #endif
 281         return 1;
 282         }
 283
 284 static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
 285         {
 286
 287         DES_cblock *deskey = ptr;
 288
 289         switch(type)
 290                 {
 291         case EVP_CTRL_RAND_KEY:
 292                 if (RAND_bytes(ptr, c->key_len) <= 0)
 293                         return 0;
 294                 DES_set_odd_parity(deskey);
 295                 if (c->key_len >= 16)
 296                         DES_set_odd_parity(deskey + 1);
 297                 if (c->key_len >= 24)
 298                         DES_set_odd_parity(deskey + 2);
 299                 return 1;
 300
 301         default:
 302                 return -1;
 303                 }
 304         }
 305
 306 const EVP_CIPHER *EVP_des_ede(void)
 307 {
 308         return &des_ede_ecb;
 309 }
 310
 311 const EVP_CIPHER *EVP_des_ede3(void)
 312 {
 313         return &des_ede3_ecb;
 314 }
 315 #endif
 316 #endif