release/src/router/openssl/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     union {
  70         double align;
  71         DES_key_schedule ks;
  72     } ks;
  73     union {
  74         void (*cbc) (const void *, void *, size_t,
  75                      const DES_key_schedule *, unsigned char *);
  76     } stream;
  77 } EVP_DES_KEY;
  78
  79 # if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__))
  80 /* ----------^^^ this is not a typo, just a way to detect that
  81  * assembler support was in general requested... */
  82 #  include "sparc_arch.h"
  83
  84 extern unsigned int OPENSSL_sparcv9cap_P[];
  85
  86 #  define SPARC_DES_CAPABLE       (OPENSSL_sparcv9cap_P[1] & CFR_DES)
  87
  88 void des_t4_key_expand(const void *key, DES_key_schedule *ks);
  89 void des_t4_cbc_encrypt(const void *inp, void *out, size_t len,
  90                         const DES_key_schedule *ks, unsigned char iv[8]);
  91 void des_t4_cbc_decrypt(const void *inp, void *out, size_t len,
  92                         const DES_key_schedule *ks, unsigned char iv[8]);
  93 # endif
  94
  95 static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
  96                         const unsigned char *iv, int enc);
  97 static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
  98
  99 /*
 100  * Because of various casts and different names can't use
 101  * IMPLEMENT_BLOCK_CIPHER
 102  */
 103
 104 static int des_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 105                           const unsigned char *in, size_t inl)
 106 {
 107     BLOCK_CIPHER_ecb_loop()
 108         DES_ecb_encrypt((DES_cblock *)(in + i), (DES_cblock *)(out + i),
 109                         ctx->cipher_data, ctx->encrypt);
 110     return 1;
 111 }
 112
 113 static int des_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 114                           const unsigned char *in, size_t inl)
 115 {
 116     while (inl >= EVP_MAXCHUNK) {
 117         DES_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data,
 118                           (DES_cblock *)ctx->iv, &ctx->num);
 119         inl -= EVP_MAXCHUNK;
 120         in += EVP_MAXCHUNK;
 121         out += EVP_MAXCHUNK;
 122     }
 123     if (inl)
 124         DES_ofb64_encrypt(in, out, (long)inl, ctx->cipher_data,
 125                           (DES_cblock *)ctx->iv, &ctx->num);
 126     return 1;
 127 }
 128
 129 static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 130                           const unsigned char *in, size_t inl)
 131 {
 132     EVP_DES_KEY *dat = (EVP_DES_KEY *) ctx->cipher_data;
 133
 134     if (dat->stream.cbc != NULL) {
 135         (*dat->stream.cbc) (in, out, inl, &dat->ks.ks, ctx->iv);
 136         return 1;
 137     }
 138     while (inl >= EVP_MAXCHUNK) {
 139         DES_ncbc_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data,
 140                          (DES_cblock *)ctx->iv, ctx->encrypt);
 141         inl -= EVP_MAXCHUNK;
 142         in += EVP_MAXCHUNK;
 143         out += EVP_MAXCHUNK;
 144     }
 145     if (inl)
 146         DES_ncbc_encrypt(in, out, (long)inl, ctx->cipher_data,
 147                          (DES_cblock *)ctx->iv, ctx->encrypt);
 148     return 1;
 149 }
 150
 151 static int des_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 152                             const unsigned char *in, size_t inl)
 153 {
 154     while (inl >= EVP_MAXCHUNK) {
 155         DES_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data,
 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_cfb64_encrypt(in, out, (long)inl, ctx->cipher_data,
 163                           (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
 164     return 1;
 165 }
 166
 167 /*
 168  * Although we have a CFB-r implementation for DES, it doesn't pack the right
 169  * way, so wrap it here
 170  */
 171 static int des_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 172                            const unsigned char *in, size_t inl)
 173 {
 174     size_t n, chunk = EVP_MAXCHUNK / 8;
 175     unsigned char c[1], d[1];
 176
 177     if (inl < chunk)
 178         chunk = inl;
 179
 180     while (inl && inl >= chunk) {
 181         for (n = 0; n < chunk * 8; ++n) {
 182             c[0] = (in[n / 8] & (1 << (7 - n % 8))) ? 0x80 : 0;
 183             DES_cfb_encrypt(c, d, 1, 1, ctx->cipher_data,
 184                             (DES_cblock *)ctx->iv, ctx->encrypt);
 185             out[n / 8] =
 186                 (out[n / 8] & ~(0x80 >> (unsigned int)(n % 8))) |
 187                 ((d[0] & 0x80) >> (unsigned int)(n % 8));
 188         }
 189         inl -= chunk;
 190         in += chunk;
 191         out += chunk;
 192         if (inl < chunk)
 193             chunk = inl;
 194     }
 195
 196     return 1;
 197 }
 198
 199 static int des_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 200                            const unsigned char *in, size_t inl)
 201 {
 202     while (inl >= EVP_MAXCHUNK) {
 203         DES_cfb_encrypt(in, out, 8, (long)EVP_MAXCHUNK, ctx->cipher_data,
 204                         (DES_cblock *)ctx->iv, ctx->encrypt);
 205         inl -= EVP_MAXCHUNK;
 206         in += EVP_MAXCHUNK;
 207         out += EVP_MAXCHUNK;
 208     }
 209     if (inl)
 210         DES_cfb_encrypt(in, out, 8, (long)inl, ctx->cipher_data,
 211                         (DES_cblock *)ctx->iv, ctx->encrypt);
 212     return 1;
 213 }
 214
 215 BLOCK_CIPHER_defs(des, EVP_DES_KEY, NID_des, 8, 8, 8, 64,
 216                   EVP_CIPH_RAND_KEY, des_init_key, NULL,
 217                   EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl)
 218
 219     BLOCK_CIPHER_def_cfb(des, EVP_DES_KEY, NID_des, 8, 8, 1,
 220                      EVP_CIPH_RAND_KEY, des_init_key, NULL,
 221                      EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl)
 222
 223     BLOCK_CIPHER_def_cfb(des, EVP_DES_KEY, NID_des, 8, 8, 8,
 224                      EVP_CIPH_RAND_KEY, des_init_key, NULL,
 225                      EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl)
 226
 227 static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 228                         const unsigned char *iv, int enc)
 229 {
 230     DES_cblock *deskey = (DES_cblock *)key;
 231     EVP_DES_KEY *dat = (EVP_DES_KEY *) ctx->cipher_data;
 232
 233     dat->stream.cbc = NULL;
 234 # if defined(SPARC_DES_CAPABLE)
 235     if (SPARC_DES_CAPABLE) {
 236         int mode = ctx->cipher->flags & EVP_CIPH_MODE;
 237
 238         if (mode == EVP_CIPH_CBC_MODE) {
 239             des_t4_key_expand(key, &dat->ks.ks);
 240             dat->stream.cbc = enc ? des_t4_cbc_encrypt : des_t4_cbc_decrypt;
 241             return 1;
 242         }
 243     }
 244 # endif
 245 # ifdef EVP_CHECK_DES_KEY
 246     if (DES_set_key_checked(deskey, dat->ks.ks) != 0)
 247         return 0;
 248 # else
 249     DES_set_key_unchecked(deskey, ctx->cipher_data);
 250 # endif
 251     return 1;
 252 }
 253
 254 static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
 255 {
 256
 257     switch (type) {
 258     case EVP_CTRL_RAND_KEY:
 259         if (RAND_bytes(ptr, 8) <= 0)
 260             return 0;
 261         DES_set_odd_parity((DES_cblock *)ptr);
 262         return 1;
 263
 264     default:
 265         return -1;
 266     }
 267 }
 268
 269 #endif