e_des3.c revision 279264
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 { 80 DES_key_schedule ks1;/* key schedule */ 81 DES_key_schedule ks2;/* key schedule (for ede) */ 82 DES_key_schedule ks3;/* key schedule (for ede3) */ 83 } DES_EDE_KEY; 84 85#define data(ctx) ((DES_EDE_KEY *)(ctx)->cipher_data) 86 87/* Because of various casts and different args can't use IMPLEMENT_BLOCK_CIPHER */ 88 89static int des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 90 const unsigned char *in, size_t inl) 91{ 92 BLOCK_CIPHER_ecb_loop() 93 DES_ecb3_encrypt((const_DES_cblock *)(in + i), 94 (DES_cblock *)(out + i), 95 &data(ctx)->ks1, &data(ctx)->ks2, 96 &data(ctx)->ks3, 97 ctx->encrypt); 98 return 1; 99} 100 101static int des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 102 const unsigned char *in, size_t inl) 103{ 104 while (inl>=EVP_MAXCHUNK) 105 { 106 DES_ede3_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK, 107 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 108 (DES_cblock *)ctx->iv, &ctx->num); 109 inl-=EVP_MAXCHUNK; 110 in +=EVP_MAXCHUNK; 111 out+=EVP_MAXCHUNK; 112 } 113 if (inl) 114 DES_ede3_ofb64_encrypt(in, out, (long)inl, 115 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 116 (DES_cblock *)ctx->iv, &ctx->num); 117 118 return 1; 119} 120 121static int des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 122 const unsigned char *in, size_t inl) 123{ 124#ifdef KSSL_DEBUG 125 { 126 int i; 127 fprintf(stderr,"des_ede_cbc_cipher(ctx=%p, buflen=%d)\n", ctx, ctx->buf_len); 128 fprintf(stderr,"\t iv= "); 129 for(i=0;i<8;i++) 130 fprintf(stderr,"%02X",ctx->iv[i]); 131 fprintf(stderr,"\n"); 132 } 133#endif /* KSSL_DEBUG */ 134 while (inl>=EVP_MAXCHUNK) 135 { 136 DES_ede3_cbc_encrypt(in, out, (long)EVP_MAXCHUNK, 137 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 138 (DES_cblock *)ctx->iv, ctx->encrypt); 139 inl-=EVP_MAXCHUNK; 140 in +=EVP_MAXCHUNK; 141 out+=EVP_MAXCHUNK; 142 } 143 if (inl) 144 DES_ede3_cbc_encrypt(in, out, (long)inl, 145 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 146 (DES_cblock *)ctx->iv, ctx->encrypt); 147 return 1; 148} 149 150static int des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 151 const unsigned char *in, size_t inl) 152{ 153 while (inl>=EVP_MAXCHUNK) 154 { 155 DES_ede3_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK, 156 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 157 (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt); 158 inl-=EVP_MAXCHUNK; 159 in +=EVP_MAXCHUNK; 160 out+=EVP_MAXCHUNK; 161 } 162 if (inl) 163 DES_ede3_cfb64_encrypt(in, out, (long)inl, 164 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 165 (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt); 166 return 1; 167} 168 169/* Although we have a CFB-r implementation for 3-DES, it doesn't pack the right 170 way, so wrap it here */ 171static int des_ede3_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 172 const unsigned char *in, size_t inl) 173 { 174 size_t n; 175 unsigned char c[1],d[1]; 176 177 for(n=0 ; n < inl ; ++n) 178 { 179 c[0]=(in[n/8]&(1 << (7-n%8))) ? 0x80 : 0; 180 DES_ede3_cfb_encrypt(c,d,1,1, 181 &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3, 182 (DES_cblock *)ctx->iv,ctx->encrypt); 183 out[n/8]=(out[n/8]&~(0x80 >> (unsigned int)(n%8))) | 184 ((d[0]&0x80) >> (unsigned int)(n%8)); 185 } 186 187 return 1; 188 } 189 190static int des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 191 const unsigned char *in, size_t inl) 192 { 193 while (inl>=EVP_MAXCHUNK) 194 { 195 DES_ede3_cfb_encrypt(in,out,8,(long)EVP_MAXCHUNK, 196 &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3, 197 (DES_cblock *)ctx->iv,ctx->encrypt); 198 inl-=EVP_MAXCHUNK; 199 in +=EVP_MAXCHUNK; 200 out+=EVP_MAXCHUNK; 201 } 202 if (inl) 203 DES_ede3_cfb_encrypt(in,out,8,(long)inl, 204 &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3, 205 (DES_cblock *)ctx->iv,ctx->encrypt); 206 return 1; 207 } 208 209BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64, 210 EVP_CIPH_RAND_KEY, des_ede_init_key, NULL, 211 EVP_CIPHER_set_asn1_iv, 212 EVP_CIPHER_get_asn1_iv, 213 des3_ctrl) 214 215#define des_ede3_cfb64_cipher des_ede_cfb64_cipher 216#define des_ede3_ofb_cipher des_ede_ofb_cipher 217#define des_ede3_cbc_cipher des_ede_cbc_cipher 218#define des_ede3_ecb_cipher des_ede_ecb_cipher 219 220BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64, 221 EVP_CIPH_RAND_KEY, des_ede3_init_key, NULL, 222 EVP_CIPHER_set_asn1_iv, 223 EVP_CIPHER_get_asn1_iv, 224 des3_ctrl) 225 226BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,1, 227 EVP_CIPH_RAND_KEY, des_ede3_init_key,NULL, 228 EVP_CIPHER_set_asn1_iv, 229 EVP_CIPHER_get_asn1_iv, 230 des3_ctrl) 231 232BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,8, 233 EVP_CIPH_RAND_KEY, des_ede3_init_key,NULL, 234 EVP_CIPHER_set_asn1_iv, 235 EVP_CIPHER_get_asn1_iv, 236 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, 251 sizeof(data(ctx)->ks1)); 252 return 1; 253 } 254 255static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 256 const unsigned char *iv, int enc) 257 { 258 DES_cblock *deskey = (DES_cblock *)key; 259#ifdef KSSL_DEBUG 260 { 261 int i; 262 fprintf(stderr,"des_ede3_init_key(ctx=%p)\n", ctx); 263 fprintf(stderr,"\tKEY= "); 264 for(i=0;i<24;i++) fprintf(stderr,"%02X",key[i]); fprintf(stderr,"\n"); 265 if (iv) 266 { 267 fprintf(stderr,"\t IV= "); 268 for(i=0;i<8;i++) fprintf(stderr,"%02X",iv[i]); fprintf(stderr,"\n"); 269 } 270 } 271#endif /* KSSL_DEBUG */ 272 273#ifdef EVP_CHECK_DES_KEY 274 if (DES_set_key_checked(&deskey[0],&data(ctx)->ks1) 275 || DES_set_key_checked(&deskey[1],&data(ctx)->ks2) 276 || DES_set_key_checked(&deskey[2],&data(ctx)->ks3)) 277 return 0; 278#else 279 DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1); 280 DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2); 281 DES_set_key_unchecked(&deskey[2],&data(ctx)->ks3); 282#endif 283 return 1; 284 } 285 286static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) 287 { 288 289 DES_cblock *deskey = ptr; 290 291 switch(type) 292 { 293 case EVP_CTRL_RAND_KEY: 294 if (RAND_bytes(ptr, c->key_len) <= 0) 295 return 0; 296 DES_set_odd_parity(deskey); 297 if (c->key_len >= 16) 298 DES_set_odd_parity(deskey + 1); 299 if (c->key_len >= 24) 300 DES_set_odd_parity(deskey + 2); 301 return 1; 302 303 default: 304 return -1; 305 } 306 } 307 308const EVP_CIPHER *EVP_des_ede(void) 309{ 310 return &des_ede_ecb; 311} 312 313const EVP_CIPHER *EVP_des_ede3(void) 314{ 315 return &des_ede3_ecb; 316} 317#endif 318#endif 319