crypto/evp/e_des.c

   1 /* crypto/evp/e_des.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 typedef struct
  69         {
  70         union { double align; DES_key_schedule ks; } ks;
  71         union {
  72                 void (*cbc)(const void *,void *,size_t,const void *,void *);
  73         } stream;
  74         } EVP_DES_KEY;
  75
  76 #if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__))
  77 /* ---------^^^ this is not a typo, just a way to detect that
  78  * assembler support was in general requested... */
  79 #include "sparc_arch.h"
  80
  81 extern unsigned int OPENSSL_sparcv9cap_P[];
  82
  83 #define SPARC_DES_CAPABLE       (OPENSSL_sparcv9cap_P[1] & CFR_DES)
  84
  85 void    des_t4_key_expand(const void *key, DES_key_schedule *ks);
  86 void    des_t4_cbc_encrypt(const void *inp,void *out,size_t len,
  87                                 DES_key_schedule *ks,unsigned char iv[8]);
  88 void    des_t4_cbc_decrypt(const void *inp,void *out,size_t len,
  89                                 DES_key_schedule *ks,unsigned char iv[8]);
  90 #endif
  91
  92 static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
  93                         const unsigned char *iv, int enc);
  94 static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
  95
  96 /* Because of various casts and different names can't use IMPLEMENT_BLOCK_CIPHER */
  97
  98 static int des_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
  99                           const unsigned char *in, size_t inl)
 100 {
 101         BLOCK_CIPHER_ecb_loop()
 102                 DES_ecb_encrypt((DES_cblock *)(in + i), (DES_cblock *)(out + i), ctx->cipher_data, ctx->encrypt);
 103         return 1;
 104 }
 105
 106 static int des_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 107                           const unsigned char *in, size_t inl)
 108 {
 109         while(inl>=EVP_MAXCHUNK)
 110                 {
 111                 DES_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data,
 112                                 (DES_cblock *)ctx->iv, &ctx->num);
 113                 inl-=EVP_MAXCHUNK;
 114                 in +=EVP_MAXCHUNK;
 115                 out+=EVP_MAXCHUNK;
 116                 }
 117         if (inl)
 118                 DES_ofb64_encrypt(in, out, (long)inl, ctx->cipher_data,
 119                                 (DES_cblock *)ctx->iv, &ctx->num);
 120         return 1;
 121 }
 122
 123 static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 124                           const unsigned char *in, size_t inl)
 125 {
 126         EVP_DES_KEY *dat = (EVP_DES_KEY *)ctx->cipher_data;
 127
 128         if (dat->stream.cbc)
 129                 {
 130                 (*dat->stream.cbc)(in,out,inl,&dat->ks.ks,ctx->iv);
 131                 return 1;
 132                 }
 133         while(inl>=EVP_MAXCHUNK)
 134                 {
 135                 DES_ncbc_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data,
 136                                 (DES_cblock *)ctx->iv, ctx->encrypt);
 137                 inl-=EVP_MAXCHUNK;
 138                 in +=EVP_MAXCHUNK;
 139                 out+=EVP_MAXCHUNK;
 140                 }
 141         if (inl)
 142                 DES_ncbc_encrypt(in, out, (long)inl, ctx->cipher_data,
 143                                 (DES_cblock *)ctx->iv, ctx->encrypt);
 144         return 1;
 145 }
 146
 147 static int des_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 148                             const unsigned char *in, size_t inl)
 149 {
 150         while(inl>=EVP_MAXCHUNK)
 151                 {
 152                 DES_cfb64_encrypt(in,out, (long)EVP_MAXCHUNK, ctx->cipher_data,
 153                                 (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
 154                 inl-=EVP_MAXCHUNK;
 155                 in +=EVP_MAXCHUNK;
 156                 out+=EVP_MAXCHUNK;
 157                 }
 158         if (inl)
 159                 DES_cfb64_encrypt(in, out, (long)inl, ctx->cipher_data,
 160                           (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
 161         return 1;
 162 }
 163
 164 /* Although we have a CFB-r implementation for DES, it doesn't pack the right
 165    way, so wrap it here */
 166 static int des_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 167                            const unsigned char *in, size_t inl)
 168     {
 169     size_t n,chunk=EVP_MAXCHUNK/8;
 170     unsigned char c[1],d[1];
 171
 172     if (inl<chunk) chunk=inl;
 173
 174     while (inl && inl>=chunk)
 175         {
 176         for(n=0 ; n < chunk*8; ++n)
 177             {
 178             c[0]=(in[n/8]&(1 << (7-n%8))) ? 0x80 : 0;
 179             DES_cfb_encrypt(c,d,1,1,ctx->cipher_data,(DES_cblock *)ctx->iv,
 180                         ctx->encrypt);
 181             out[n/8]=(out[n/8]&~(0x80 >> (unsigned int)(n%8))) |
 182                      ((d[0]&0x80) >> (unsigned int)(n%8));
 183             }
 184         inl-=chunk;
 185         in +=chunk;
 186         out+=chunk;
 187         if (inl<chunk) chunk=inl;
 188         }
 189
 190     return 1;
 191     }
 192
 193 static int des_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 194                            const unsigned char *in, size_t inl)
 195     {
 196     while (inl>=EVP_MAXCHUNK)
 197         {
 198         DES_cfb_encrypt(in,out,8,(long)EVP_MAXCHUNK,ctx->cipher_data,
 199                         (DES_cblock *)ctx->iv,ctx->encrypt);
 200         inl-=EVP_MAXCHUNK;
 201         in +=EVP_MAXCHUNK;
 202         out+=EVP_MAXCHUNK;
 203         }
 204     if (inl)
 205         DES_cfb_encrypt(in,out,8,(long)inl,ctx->cipher_data,
 206                         (DES_cblock *)ctx->iv,ctx->encrypt);
 207     return 1;
 208     }
 209
 210 BLOCK_CIPHER_defs(des, EVP_DES_KEY, NID_des, 8, 8, 8, 64,
 211                         EVP_CIPH_RAND_KEY, des_init_key, NULL,
 212                         EVP_CIPHER_set_asn1_iv,
 213                         EVP_CIPHER_get_asn1_iv,
 214                         des_ctrl)
 215
 216 BLOCK_CIPHER_def_cfb(des,EVP_DES_KEY,NID_des,8,8,1,
 217                      EVP_CIPH_RAND_KEY, des_init_key,NULL,
 218                      EVP_CIPHER_set_asn1_iv,
 219                      EVP_CIPHER_get_asn1_iv,des_ctrl)
 220
 221 BLOCK_CIPHER_def_cfb(des,EVP_DES_KEY,NID_des,8,8,8,
 222                      EVP_CIPH_RAND_KEY,des_init_key,NULL,
 223                      EVP_CIPHER_set_asn1_iv,
 224                      EVP_CIPHER_get_asn1_iv,des_ctrl)
 225
 226 static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 227                         const unsigned char *iv, int enc)
 228         {
 229         DES_cblock *deskey = (DES_cblock *)key;
 230         EVP_DES_KEY *dat = (EVP_DES_KEY *)ctx->cipher_data;
 231
 232         dat->stream.cbc = NULL;
 233 #if defined(SPARC_DES_CAPABLE)
 234         if (SPARC_DES_CAPABLE)
 235                 {
 236                 int mode = ctx->cipher->flags & EVP_CIPH_MODE;
 237
 238                 if (mode == EVP_CIPH_CBC_MODE)
 239                         {
 240                         des_t4_key_expand(key,&dat->ks.ks);
 241                         dat->stream.cbc = enc ? des_t4_cbc_encrypt :
 242                                                 des_t4_cbc_decrypt;
 243                         return 1;
 244                         }
 245                 }
 246 #endif
 247 #ifdef EVP_CHECK_DES_KEY
 248         if(DES_set_key_checked(deskey,dat->ks.ks) != 0)
 249                 return 0;
 250 #else
 251         DES_set_key_unchecked(deskey,ctx->cipher_data);
 252 #endif
 253         return 1;
 254         }
 255
 256 static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
 257         {
 258
 259         switch(type)
 260                 {
 261         case EVP_CTRL_RAND_KEY:
 262                 if (RAND_bytes(ptr, 8) <= 0)
 263                         return 0;
 264                 DES_set_odd_parity((DES_cblock *)ptr);
 265                 return 1;
 266
 267         default:
 268                 return -1;
 269                 }
 270         }
 271
 272 #endif