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      1 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com)
      2  * All rights reserved.
      3  *
      4  * This package is an SSL implementation written
      5  * by Eric Young (eay (at) cryptsoft.com).
      6  * The implementation was written so as to conform with Netscapes SSL.
      7  *
      8  * This library is free for commercial and non-commercial use as long as
      9  * the following conditions are aheared to.  The following conditions
     10  * apply to all code found in this distribution, be it the RC4, RSA,
     11  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
     12  * included with this distribution is covered by the same copyright terms
     13  * except that the holder is Tim Hudson (tjh (at) cryptsoft.com).
     14  *
     15  * Copyright remains Eric Young's, and as such any Copyright notices in
     16  * the code are not to be removed.
     17  * If this package is used in a product, Eric Young should be given attribution
     18  * as the author of the parts of the library used.
     19  * This can be in the form of a textual message at program startup or
     20  * in documentation (online or textual) provided with the package.
     21  *
     22  * Redistribution and use in source and binary forms, with or without
     23  * modification, are permitted provided that the following conditions
     24  * are met:
     25  * 1. Redistributions of source code must retain the copyright
     26  *    notice, this list of conditions and the following disclaimer.
     27  * 2. Redistributions in binary form must reproduce the above copyright
     28  *    notice, this list of conditions and the following disclaimer in the
     29  *    documentation and/or other materials provided with the distribution.
     30  * 3. All advertising materials mentioning features or use of this software
     31  *    must display the following acknowledgement:
     32  *    "This product includes cryptographic software written by
     33  *     Eric Young (eay (at) cryptsoft.com)"
     34  *    The word 'cryptographic' can be left out if the rouines from the library
     35  *    being used are not cryptographic related :-).
     36  * 4. If you include any Windows specific code (or a derivative thereof) from
     37  *    the apps directory (application code) you must include an acknowledgement:
     38  *    "This product includes software written by Tim Hudson (tjh (at) cryptsoft.com)"
     39  *
     40  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
     41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     50  * SUCH DAMAGE.
     51  *
     52  * The licence and distribution terms for any publically available version or
     53  * derivative of this code cannot be changed.  i.e. this code cannot simply be
     54  * copied and put under another distribution licence
     55  * [including the GNU Public Licence.] */
     56 
     57 #include <openssl/cipher.h>
     58 #include <openssl/des.h>
     59 #include <openssl/obj.h>
     60 
     61 #include "internal.h"
     62 
     63 
     64 typedef struct {
     65   union {
     66     double align;
     67     DES_key_schedule ks;
     68   } ks;
     69 } EVP_DES_KEY;
     70 
     71 static int des_init_key(EVP_CIPHER_CTX *ctx, const uint8_t *key,
     72                         const uint8_t *iv, int enc) {
     73   DES_cblock *deskey = (DES_cblock *)key;
     74   EVP_DES_KEY *dat = (EVP_DES_KEY *)ctx->cipher_data;
     75 
     76   DES_set_key(deskey, &dat->ks.ks);
     77   return 1;
     78 }
     79 
     80 static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, uint8_t *out, const uint8_t *in,
     81                           size_t in_len) {
     82   EVP_DES_KEY *dat = (EVP_DES_KEY *)ctx->cipher_data;
     83 
     84   DES_ncbc_encrypt(in, out, in_len, &dat->ks.ks, (DES_cblock *)ctx->iv,
     85                    ctx->encrypt);
     86 
     87   return 1;
     88 }
     89 
     90 static const EVP_CIPHER des_cbc = {
     91     NID_des_cbc,         8 /* block_size */,  8 /* key_size */,
     92     8 /* iv_len */,      sizeof(EVP_DES_KEY), EVP_CIPH_CBC_MODE,
     93     NULL /* app_data */, des_init_key,        des_cbc_cipher,
     94     NULL /* cleanup */,  NULL /* ctrl */, };
     95 
     96 const EVP_CIPHER *EVP_des_cbc(void) { return &des_cbc; }
     97 
     98 
     99 static int des_ecb_cipher(EVP_CIPHER_CTX *ctx, uint8_t *out, const uint8_t *in,
    100                           size_t in_len) {
    101   if (in_len < ctx->cipher->block_size) {
    102     return 1;
    103   }
    104   in_len -= ctx->cipher->block_size;
    105 
    106   EVP_DES_KEY *dat = (EVP_DES_KEY *) ctx->cipher_data;
    107   size_t i;
    108   for (i = 0; i <= in_len; i += ctx->cipher->block_size) {
    109     DES_ecb_encrypt((DES_cblock *) (in + i), (DES_cblock *) (out + i),
    110                     &dat->ks.ks, ctx->encrypt);
    111   }
    112   return 1;
    113 }
    114 
    115 static const EVP_CIPHER des_ecb = {
    116     NID_des_ecb,         8 /* block_size */,  8 /* key_size */,
    117     0 /* iv_len */,      sizeof(EVP_DES_KEY), EVP_CIPH_ECB_MODE,
    118     NULL /* app_data */, des_init_key,        des_ecb_cipher,
    119     NULL /* cleanup */,  NULL /* ctrl */, };
    120 
    121 const EVP_CIPHER *EVP_des_ecb(void) { return &des_ecb; }
    122 
    123 
    124 typedef struct {
    125   union {
    126     double align;
    127     DES_key_schedule ks[3];
    128   } ks;
    129 } DES_EDE_KEY;
    130 
    131 
    132 static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const uint8_t *key,
    133                              const uint8_t *iv, int enc) {
    134   DES_cblock *deskey = (DES_cblock *)key;
    135   DES_EDE_KEY *dat = (DES_EDE_KEY*) ctx->cipher_data;
    136 
    137   DES_set_key(&deskey[0], &dat->ks.ks[0]);
    138   DES_set_key(&deskey[1], &dat->ks.ks[1]);
    139   DES_set_key(&deskey[2], &dat->ks.ks[2]);
    140 
    141   return 1;
    142 }
    143 
    144 static int des_ede3_cbc_cipher(EVP_CIPHER_CTX *ctx, uint8_t *out,
    145                               const uint8_t *in, size_t in_len) {
    146   DES_EDE_KEY *dat = (DES_EDE_KEY*) ctx->cipher_data;
    147 
    148   DES_ede3_cbc_encrypt(in, out, in_len, &dat->ks.ks[0], &dat->ks.ks[1],
    149                        &dat->ks.ks[2], (DES_cblock *)ctx->iv, ctx->encrypt);
    150 
    151   return 1;
    152 }
    153 
    154 static const EVP_CIPHER des_ede3_cbc = {
    155     NID_des_ede3_cbc,    8 /* block_size */,  24 /* key_size */,
    156     8 /* iv_len */,      sizeof(DES_EDE_KEY), EVP_CIPH_CBC_MODE,
    157     NULL /* app_data */, des_ede3_init_key,   des_ede3_cbc_cipher,
    158     NULL /* cleanup */,  NULL /* ctrl */, };
    159 
    160 const EVP_CIPHER *EVP_des_ede3_cbc(void) { return &des_ede3_cbc; }
    161 
    162 
    163 static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const uint8_t *key,
    164                              const uint8_t *iv, int enc) {
    165   DES_cblock *deskey = (DES_cblock *) key;
    166   DES_EDE_KEY *dat = (DES_EDE_KEY *) ctx->cipher_data;
    167 
    168   DES_set_key(&deskey[0], &dat->ks.ks[0]);
    169   DES_set_key(&deskey[1], &dat->ks.ks[1]);
    170   DES_set_key(&deskey[0], &dat->ks.ks[2]);
    171 
    172   return 1;
    173 }
    174 
    175 static const EVP_CIPHER des_ede_cbc = {
    176     NID_des_ede_cbc,     8 /* block_size */,  16 /* key_size */,
    177     8 /* iv_len */,      sizeof(DES_EDE_KEY), EVP_CIPH_CBC_MODE,
    178     NULL /* app_data */, des_ede_init_key ,   des_ede3_cbc_cipher,
    179     NULL /* cleanup */,  NULL /* ctrl */, };
    180 
    181 const EVP_CIPHER *EVP_des_ede_cbc(void) { return &des_ede_cbc; }
    182 
    183 
    184 static int des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, uint8_t *out,
    185                               const uint8_t *in, size_t in_len) {
    186   if (in_len < ctx->cipher->block_size) {
    187     return 1;
    188   }
    189   in_len -= ctx->cipher->block_size;
    190 
    191   DES_EDE_KEY *dat = (DES_EDE_KEY *) ctx->cipher_data;
    192   size_t i;
    193   for (i = 0; i <= in_len; i += ctx->cipher->block_size) {
    194     DES_ecb3_encrypt((DES_cblock *) (in + i), (DES_cblock *) (out + i),
    195                      &dat->ks.ks[0], &dat->ks.ks[1], &dat->ks.ks[2],
    196                      ctx->encrypt);
    197   }
    198   return 1;
    199 }
    200 
    201 static const EVP_CIPHER des_ede_ecb = {
    202     NID_des_ede_cbc,     8 /* block_size */,  16 /* key_size */,
    203     0 /* iv_len */,      sizeof(DES_EDE_KEY), EVP_CIPH_ECB_MODE,
    204     NULL /* app_data */, des_ede_init_key ,   des_ede_ecb_cipher,
    205     NULL /* cleanup */,  NULL /* ctrl */, };
    206 
    207 const EVP_CIPHER *EVP_des_ede(void) { return &des_ede_ecb; }
    208