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, unsigned int 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, unsigned int inl)
 101 {
 102         DES_ede3_ofb64_encrypt(in, out, (long)inl,
 103                                &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
 104                                (DES_cblock *)ctx->iv, &ctx->num);
 105         return 1;
 106 }
 107
 108 static int des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 109                               const unsigned char *in, unsigned int inl)
 110 {
 111 #ifdef KSSL_DEBUG
 112         {
 113         int i;
 114         char *cp;
 115         printf("des_ede_cbc_cipher(ctx=%lx, buflen=%d)\n", ctx, ctx->buf_len);
 116         printf("\t iv= ");
 117         for(i=0;i<8;i++)
 118                 printf("%02X",ctx->iv[i]);
 119         printf("\n");
 120         }
 121 #endif    /* KSSL_DEBUG */
 122         DES_ede3_cbc_encrypt(in, out, (long)inl,
 123                              &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
 124                              (DES_cblock *)ctx->iv, ctx->encrypt);
 125         return 1;
 126 }
 127
 128 static int des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 129                               const unsigned char *in, unsigned int inl)
 130 {
 131         DES_ede3_cfb64_encrypt(in, out, (long)inl,
 132                                &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
 133                                (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
 134         return 1;
 135 }
 136
 137 /* Although we have a CFB-r implementation for 3-DES, it doesn't pack the right
 138    way, so wrap it here */
 139 static int des_ede3_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 140                                 const unsigned char *in, unsigned int inl)
 141     {
 142     unsigned int n;
 143     unsigned char c[1],d[1];
 144
 145     for(n=0 ; n < inl ; ++n)
 146         {
 147         c[0]=(in[n/8]&(1 << (7-n%8))) ? 0x80 : 0;
 148         DES_ede3_cfb_encrypt(c,d,1,1,
 149                              &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3,
 150                              (DES_cblock *)ctx->iv,ctx->encrypt);
 151         out[n/8]=(out[n/8]&~(0x80 >> (n%8)))|((d[0]&0x80) >> (n%8));
 152         }
 153
 154     return 1;
 155     }
 156
 157 static int des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 158                                 const unsigned char *in, unsigned int inl)
 159     {
 160     DES_ede3_cfb_encrypt(in,out,8,inl,
 161                          &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3,
 162                          (DES_cblock *)ctx->iv,ctx->encrypt);
 163     return 1;
 164     }
 165
 166 BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64,
 167                         EVP_CIPH_RAND_KEY, des_ede_init_key, NULL,
 168                         EVP_CIPHER_set_asn1_iv,
 169                         EVP_CIPHER_get_asn1_iv,
 170                         des3_ctrl)
 171
 172 #define des_ede3_cfb64_cipher des_ede_cfb64_cipher
 173 #define des_ede3_ofb_cipher des_ede_ofb_cipher
 174 #define des_ede3_cbc_cipher des_ede_cbc_cipher
 175 #define des_ede3_ecb_cipher des_ede_ecb_cipher
 176
 177 BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64,
 178                         EVP_CIPH_RAND_KEY, des_ede3_init_key, NULL,
 179                         EVP_CIPHER_set_asn1_iv,
 180                         EVP_CIPHER_get_asn1_iv,
 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, des_ede3_init_key,NULL,
 185                      EVP_CIPHER_set_asn1_iv,
 186                      EVP_CIPHER_get_asn1_iv,
 187                      des3_ctrl)
 188
 189 BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,8,
 190                      EVP_CIPH_RAND_KEY, des_ede3_init_key,NULL,
 191                      EVP_CIPHER_set_asn1_iv,
 192                      EVP_CIPHER_get_asn1_iv,
 193                      des3_ctrl)
 194
 195 static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 196                             const unsigned char *iv, int enc)
 197         {
 198         DES_cblock *deskey = (DES_cblock *)key;
 199 #ifdef EVP_CHECK_DES_KEY
 200         if (DES_set_key_checked(&deskey[0],&data(ctx)->ks1)
 201                 !! DES_set_key_checked(&deskey[1],&data(ctx)->ks2))
 202                 return 0;
 203 #else
 204         DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1);
 205         DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2);
 206 #endif
 207         memcpy(&data(ctx)->ks3,&data(ctx)->ks1,
 208                sizeof(data(ctx)->ks1));
 209         return 1;
 210         }
 211
 212 static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 213                              const unsigned char *iv, int enc)
 214         {
 215         DES_cblock *deskey = (DES_cblock *)key;
 216 #ifdef KSSL_DEBUG
 217         {
 218         int i;
 219         printf("des_ede3_init_key(ctx=%lx)\n", ctx);
 220         printf("\tKEY= ");
 221         for(i=0;i<24;i++) printf("%02X",key[i]); printf("\n");
 222         printf("\t IV= ");
 223         for(i=0;i<8;i++) printf("%02X",iv[i]); printf("\n");
 224         }
 225 #endif  /* KSSL_DEBUG */
 226
 227 #ifdef EVP_CHECK_DES_KEY
 228         if (DES_set_key_checked(&deskey[0],&data(ctx)->ks1)
 229                 || DES_set_key_checked(&deskey[1],&data(ctx)->ks2)
 230                 || DES_set_key_checked(&deskey[2],&data(ctx)->ks3))
 231                 return 0;
 232 #else
 233         DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1);
 234         DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2);
 235         DES_set_key_unchecked(&deskey[2],&data(ctx)->ks3);
 236 #endif
 237         return 1;
 238         }
 239
 240 static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
 241         {
 242
 243         DES_cblock *deskey = ptr;
 244
 245         switch(type)
 246                 {
 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