e_des3.c revision 296341
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# ifndef OPENSSL_FIPS 69 70static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 71 const unsigned char *iv, int enc); 72 73static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 74 const unsigned char *iv, int enc); 75 76static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); 77 78typedef struct { 79 DES_key_schedule ks1; /* key schedule */ 80 DES_key_schedule ks2; /* key schedule (for ede) */ 81 DES_key_schedule ks3; /* key schedule (for ede3) */ 82} DES_EDE_KEY; 83 84# define data(ctx) ((DES_EDE_KEY *)(ctx)->cipher_data) 85 86/* 87 * Because of various casts and different args can't use 88 * IMPLEMENT_BLOCK_CIPHER 89 */ 90 91static int des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 92 const unsigned char *in, size_t inl) 93{ 94 BLOCK_CIPHER_ecb_loop() 95 DES_ecb3_encrypt((const_DES_cblock *)(in + i), 96 (DES_cblock *)(out + i), 97 &data(ctx)->ks1, &data(ctx)->ks2, 98 &data(ctx)->ks3, ctx->encrypt); 99 return 1; 100} 101 102static int des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 103 const unsigned char *in, size_t inl) 104{ 105 while (inl >= EVP_MAXCHUNK) { 106 DES_ede3_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK, 107 &data(ctx)->ks1, &data(ctx)->ks2, 108 &data(ctx)->ks3, (DES_cblock *)ctx->iv, 109 &ctx->num); 110 inl -= EVP_MAXCHUNK; 111 in += EVP_MAXCHUNK; 112 out += EVP_MAXCHUNK; 113 } 114 if (inl) 115 DES_ede3_ofb64_encrypt(in, out, (long)inl, 116 &data(ctx)->ks1, &data(ctx)->ks2, 117 &data(ctx)->ks3, (DES_cblock *)ctx->iv, 118 &ctx->num); 119 120 return 1; 121} 122 123static int des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 124 const unsigned char *in, size_t inl) 125{ 126# ifdef KSSL_DEBUG 127 { 128 int i; 129 fprintf(stderr, "des_ede_cbc_cipher(ctx=%p, buflen=%d)\n", ctx, 130 ctx->buf_len); 131 fprintf(stderr, "\t iv= "); 132 for (i = 0; i < 8; i++) 133 fprintf(stderr, "%02X", ctx->iv[i]); 134 fprintf(stderr, "\n"); 135 } 136# endif /* KSSL_DEBUG */ 137 while (inl >= EVP_MAXCHUNK) { 138 DES_ede3_cbc_encrypt(in, out, (long)EVP_MAXCHUNK, 139 &data(ctx)->ks1, &data(ctx)->ks2, 140 &data(ctx)->ks3, (DES_cblock *)ctx->iv, 141 ctx->encrypt); 142 inl -= EVP_MAXCHUNK; 143 in += EVP_MAXCHUNK; 144 out += EVP_MAXCHUNK; 145 } 146 if (inl) 147 DES_ede3_cbc_encrypt(in, out, (long)inl, 148 &data(ctx)->ks1, &data(ctx)->ks2, 149 &data(ctx)->ks3, (DES_cblock *)ctx->iv, 150 ctx->encrypt); 151 return 1; 152} 153 154static int des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 155 const unsigned char *in, size_t inl) 156{ 157 while (inl >= EVP_MAXCHUNK) { 158 DES_ede3_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK, 159 &data(ctx)->ks1, &data(ctx)->ks2, 160 &data(ctx)->ks3, (DES_cblock *)ctx->iv, 161 &ctx->num, ctx->encrypt); 162 inl -= EVP_MAXCHUNK; 163 in += EVP_MAXCHUNK; 164 out += EVP_MAXCHUNK; 165 } 166 if (inl) 167 DES_ede3_cfb64_encrypt(in, out, (long)inl, 168 &data(ctx)->ks1, &data(ctx)->ks2, 169 &data(ctx)->ks3, (DES_cblock *)ctx->iv, 170 &ctx->num, ctx->encrypt); 171 return 1; 172} 173 174/* 175 * Although we have a CFB-r implementation for 3-DES, it doesn't pack the 176 * right way, so wrap it here 177 */ 178static int des_ede3_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 179 const unsigned char *in, size_t inl) 180{ 181 size_t n; 182 unsigned char c[1], d[1]; 183 184 for (n = 0; n < inl; ++n) { 185 c[0] = (in[n / 8] & (1 << (7 - n % 8))) ? 0x80 : 0; 186 DES_ede3_cfb_encrypt(c, d, 1, 1, 187 &data(ctx)->ks1, &data(ctx)->ks2, 188 &data(ctx)->ks3, (DES_cblock *)ctx->iv, 189 ctx->encrypt); 190 out[n / 8] = (out[n / 8] & ~(0x80 >> (unsigned int)(n % 8))) 191 | ((d[0] & 0x80) >> (unsigned int)(n % 8)); 192 } 193 194 return 1; 195} 196 197static int des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 198 const unsigned char *in, size_t inl) 199{ 200 while (inl >= EVP_MAXCHUNK) { 201 DES_ede3_cfb_encrypt(in, out, 8, (long)EVP_MAXCHUNK, 202 &data(ctx)->ks1, &data(ctx)->ks2, 203 &data(ctx)->ks3, (DES_cblock *)ctx->iv, 204 ctx->encrypt); 205 inl -= EVP_MAXCHUNK; 206 in += EVP_MAXCHUNK; 207 out += EVP_MAXCHUNK; 208 } 209 if (inl) 210 DES_ede3_cfb_encrypt(in, out, 8, (long)inl, 211 &data(ctx)->ks1, &data(ctx)->ks2, 212 &data(ctx)->ks3, (DES_cblock *)ctx->iv, 213 ctx->encrypt); 214 return 1; 215} 216 217BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64, 218 EVP_CIPH_RAND_KEY, des_ede_init_key, NULL, 219 EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des3_ctrl) 220# define des_ede3_cfb64_cipher des_ede_cfb64_cipher 221# define des_ede3_ofb_cipher des_ede_ofb_cipher 222# define des_ede3_cbc_cipher des_ede_cbc_cipher 223# define des_ede3_ecb_cipher des_ede_ecb_cipher 224 BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64, 225 EVP_CIPH_RAND_KEY, des_ede3_init_key, NULL, 226 EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des3_ctrl) 227 228 BLOCK_CIPHER_def_cfb(des_ede3, DES_EDE_KEY, NID_des_ede3, 24, 8, 1, 229 EVP_CIPH_RAND_KEY, des_ede3_init_key, NULL, 230 EVP_CIPHER_set_asn1_iv, 231 EVP_CIPHER_get_asn1_iv, des3_ctrl) 232 233 BLOCK_CIPHER_def_cfb(des_ede3, DES_EDE_KEY, NID_des_ede3, 24, 8, 8, 234 EVP_CIPH_RAND_KEY, des_ede3_init_key, NULL, 235 EVP_CIPHER_set_asn1_iv, 236 EVP_CIPHER_get_asn1_iv, des3_ctrl) 237 238static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 239 const unsigned char *iv, int enc) 240{ 241 DES_cblock *deskey = (DES_cblock *)key; 242# ifdef EVP_CHECK_DES_KEY 243 if (DES_set_key_checked(&deskey[0], &data(ctx)->ks1) 244 ! !DES_set_key_checked(&deskey[1], &data(ctx)->ks2)) 245 return 0; 246# else 247 DES_set_key_unchecked(&deskey[0], &data(ctx)->ks1); 248 DES_set_key_unchecked(&deskey[1], &data(ctx)->ks2); 249# endif 250 memcpy(&data(ctx)->ks3, &data(ctx)->ks1, sizeof(data(ctx)->ks1)); 251 return 1; 252} 253 254static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 255 const unsigned char *iv, int enc) 256{ 257 DES_cblock *deskey = (DES_cblock *)key; 258# ifdef KSSL_DEBUG 259 { 260 int i; 261 fprintf(stderr, "des_ede3_init_key(ctx=%p)\n", ctx); 262 fprintf(stderr, "\tKEY= "); 263 for (i = 0; i < 24; i++) 264 fprintf(stderr, "%02X", key[i]); 265 fprintf(stderr, "\n"); 266 if (iv) { 267 fprintf(stderr, "\t IV= "); 268 for (i = 0; i < 8; i++) 269 fprintf(stderr, "%02X", iv[i]); 270 fprintf(stderr, "\n"); 271 } 272 } 273# endif /* KSSL_DEBUG */ 274 275# ifdef EVP_CHECK_DES_KEY 276 if (DES_set_key_checked(&deskey[0], &data(ctx)->ks1) 277 || DES_set_key_checked(&deskey[1], &data(ctx)->ks2) 278 || DES_set_key_checked(&deskey[2], &data(ctx)->ks3)) 279 return 0; 280# else 281 DES_set_key_unchecked(&deskey[0], &data(ctx)->ks1); 282 DES_set_key_unchecked(&deskey[1], &data(ctx)->ks2); 283 DES_set_key_unchecked(&deskey[2], &data(ctx)->ks3); 284# endif 285 return 1; 286} 287 288static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) 289{ 290 291 DES_cblock *deskey = ptr; 292 293 switch (type) { 294 case EVP_CTRL_RAND_KEY: 295 if (RAND_bytes(ptr, c->key_len) <= 0) 296 return 0; 297 DES_set_odd_parity(deskey); 298 if (c->key_len >= 16) 299 DES_set_odd_parity(deskey + 1); 300 if (c->key_len >= 24) 301 DES_set_odd_parity(deskey + 2); 302 return 1; 303 304 default: 305 return -1; 306 } 307} 308 309const EVP_CIPHER *EVP_des_ede(void) 310{ 311 return &des_ede_ecb; 312} 313 314const EVP_CIPHER *EVP_des_ede3(void) 315{ 316 return &des_ede3_ecb; 317} 318# endif 319#endif 320