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/nid.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 for (size_t i = 0; i <= in_len; i += ctx->cipher->block_size) { 108 DES_ecb_encrypt((DES_cblock *) (in + i), (DES_cblock *) (out + i), 109 &dat->ks.ks, ctx->encrypt); 110 } 111 return 1; 112 } 113 114 static const EVP_CIPHER des_ecb = { 115 NID_des_ecb, 8 /* block_size */, 8 /* key_size */, 116 0 /* iv_len */, sizeof(EVP_DES_KEY), EVP_CIPH_ECB_MODE, 117 NULL /* app_data */, des_init_key, des_ecb_cipher, 118 NULL /* cleanup */, NULL /* ctrl */, }; 119 120 const EVP_CIPHER *EVP_des_ecb(void) { return &des_ecb; } 121 122 123 typedef struct { 124 union { 125 double align; 126 DES_key_schedule ks[3]; 127 } ks; 128 } DES_EDE_KEY; 129 130 131 static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const uint8_t *key, 132 const uint8_t *iv, int enc) { 133 DES_cblock *deskey = (DES_cblock *)key; 134 DES_EDE_KEY *dat = (DES_EDE_KEY*) ctx->cipher_data; 135 136 DES_set_key(&deskey[0], &dat->ks.ks[0]); 137 DES_set_key(&deskey[1], &dat->ks.ks[1]); 138 DES_set_key(&deskey[2], &dat->ks.ks[2]); 139 140 return 1; 141 } 142 143 static int des_ede3_cbc_cipher(EVP_CIPHER_CTX *ctx, uint8_t *out, 144 const uint8_t *in, size_t in_len) { 145 DES_EDE_KEY *dat = (DES_EDE_KEY*) ctx->cipher_data; 146 147 DES_ede3_cbc_encrypt(in, out, in_len, &dat->ks.ks[0], &dat->ks.ks[1], 148 &dat->ks.ks[2], (DES_cblock *)ctx->iv, ctx->encrypt); 149 150 return 1; 151 } 152 153 static const EVP_CIPHER des_ede3_cbc = { 154 NID_des_ede3_cbc, 8 /* block_size */, 24 /* key_size */, 155 8 /* iv_len */, sizeof(DES_EDE_KEY), EVP_CIPH_CBC_MODE, 156 NULL /* app_data */, des_ede3_init_key, des_ede3_cbc_cipher, 157 NULL /* cleanup */, NULL /* ctrl */, }; 158 159 const EVP_CIPHER *EVP_des_ede3_cbc(void) { return &des_ede3_cbc; } 160 161 162 static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const uint8_t *key, 163 const uint8_t *iv, int enc) { 164 DES_cblock *deskey = (DES_cblock *) key; 165 DES_EDE_KEY *dat = (DES_EDE_KEY *) ctx->cipher_data; 166 167 DES_set_key(&deskey[0], &dat->ks.ks[0]); 168 DES_set_key(&deskey[1], &dat->ks.ks[1]); 169 DES_set_key(&deskey[0], &dat->ks.ks[2]); 170 171 return 1; 172 } 173 174 static const EVP_CIPHER des_ede_cbc = { 175 NID_des_ede_cbc, 8 /* block_size */, 16 /* key_size */, 176 8 /* iv_len */, sizeof(DES_EDE_KEY), EVP_CIPH_CBC_MODE, 177 NULL /* app_data */, des_ede_init_key , des_ede3_cbc_cipher, 178 NULL /* cleanup */, NULL /* ctrl */, }; 179 180 const EVP_CIPHER *EVP_des_ede_cbc(void) { return &des_ede_cbc; } 181 182 183 static int des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, uint8_t *out, 184 const uint8_t *in, size_t in_len) { 185 if (in_len < ctx->cipher->block_size) { 186 return 1; 187 } 188 in_len -= ctx->cipher->block_size; 189 190 DES_EDE_KEY *dat = (DES_EDE_KEY *) ctx->cipher_data; 191 for (size_t i = 0; i <= in_len; i += ctx->cipher->block_size) { 192 DES_ecb3_encrypt((DES_cblock *) (in + i), (DES_cblock *) (out + i), 193 &dat->ks.ks[0], &dat->ks.ks[1], &dat->ks.ks[2], 194 ctx->encrypt); 195 } 196 return 1; 197 } 198 199 static const EVP_CIPHER des_ede_ecb = { 200 NID_des_ede_cbc, 8 /* block_size */, 16 /* key_size */, 201 0 /* iv_len */, sizeof(DES_EDE_KEY), EVP_CIPH_ECB_MODE, 202 NULL /* app_data */, des_ede_init_key , des_ede_ecb_cipher, 203 NULL /* cleanup */, NULL /* ctrl */, }; 204 205 const EVP_CIPHER *EVP_des_ede(void) { return &des_ede_ecb; } 206
