1 /* crypto/evp/e_des3.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 70 static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 71 const unsigned char *iv,int enc); 72 73 static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 74 const unsigned char *iv,int enc); 75 76 static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); 77 78 typedef 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 89 static 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 } 100 101 static int des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 102 const unsigned char *in, size_t inl) 103 { 104 if (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 } 120 121 static 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 char *cp; 128 printf("des_ede_cbc_cipher(ctx=%lx, buflen=%d)\n", ctx, ctx->buf_len); 129 printf("\t iv= "); 130 for(i=0;i<8;i++) 131 printf("%02X",ctx->iv[i]); 132 printf("\n"); 133 } 134 #endif /* KSSL_DEBUG */ 135 if (inl>=EVP_MAXCHUNK) 136 { 137 DES_ede3_cbc_encrypt(in, out, (long)EVP_MAXCHUNK, 138 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 139 (DES_cblock *)ctx->iv, ctx->encrypt); 140 inl-=EVP_MAXCHUNK; 141 in +=EVP_MAXCHUNK; 142 out+=EVP_MAXCHUNK; 143 } 144 if (inl) 145 DES_ede3_cbc_encrypt(in, out, (long)inl, 146 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 147 (DES_cblock *)ctx->iv, ctx->encrypt); 148 return 1; 149 } 150 151 static int des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 152 const unsigned char *in, size_t inl) 153 { 154 if (inl>=EVP_MAXCHUNK) 155 { 156 DES_ede3_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK, 157 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 158 (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt); 159 inl-=EVP_MAXCHUNK; 160 in +=EVP_MAXCHUNK; 161 out+=EVP_MAXCHUNK; 162 } 163 if (inl) 164 DES_ede3_cfb64_encrypt(in, out, (long)inl, 165 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 166 (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt); 167 return 1; 168 } 169 170 /* Although we have a CFB-r implementation for 3-DES, it doesn't pack the right 171 way, so wrap it here */ 172 static int des_ede3_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 173 const unsigned char *in, size_t inl) 174 { 175 size_t n; 176 unsigned char c[1],d[1]; 177 178 for(n=0 ; n < inl ; ++n) 179 { 180 c[0]=(in[n/8]&(1 << (7-n%8))) ? 0x80 : 0; 181 DES_ede3_cfb_encrypt(c,d,1,1, 182 &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3, 183 (DES_cblock *)ctx->iv,ctx->encrypt); 184 out[n/8]=(out[n/8]&~(0x80 >> (unsigned int)(n%8))) | 185 ((d[0]&0x80) >> (unsigned int)(n%8)); 186 } 187 188 return 1; 189 } 190 191 static int des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 192 const unsigned char *in, size_t inl) 193 { 194 while (inl>=EVP_MAXCHUNK) 195 { 196 DES_ede3_cfb_encrypt(in,out,8,(long)EVP_MAXCHUNK, 197 &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3, 198 (DES_cblock *)ctx->iv,ctx->encrypt); 199 inl-=EVP_MAXCHUNK; 200 in +=EVP_MAXCHUNK; 201 out+=EVP_MAXCHUNK; 202 } 203 if (inl) 204 DES_ede3_cfb_encrypt(in,out,8,(long)inl, 205 &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3, 206 (DES_cblock *)ctx->iv,ctx->encrypt); 207 return 1; 208 } 209 210 BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64, 211 EVP_CIPH_RAND_KEY, des_ede_init_key, NULL, 212 EVP_CIPHER_set_asn1_iv, 213 EVP_CIPHER_get_asn1_iv, 214 des3_ctrl) 215 216 #define des_ede3_cfb64_cipher des_ede_cfb64_cipher 217 #define des_ede3_ofb_cipher des_ede_ofb_cipher 218 #define des_ede3_cbc_cipher des_ede_cbc_cipher 219 #define des_ede3_ecb_cipher des_ede_ecb_cipher 220 221 BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64, 222 EVP_CIPH_RAND_KEY, des_ede3_init_key, NULL, 223 EVP_CIPHER_set_asn1_iv, 224 EVP_CIPHER_get_asn1_iv, 225 des3_ctrl) 226 227 BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,1, 228 EVP_CIPH_RAND_KEY, des_ede3_init_key,NULL, 229 EVP_CIPHER_set_asn1_iv, 230 EVP_CIPHER_get_asn1_iv, 231 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, 237 des3_ctrl) 238 239 static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 240 const unsigned char *iv, int enc) 241 { 242 DES_cblock *deskey = (DES_cblock *)key; 243 #ifdef EVP_CHECK_DES_KEY 244 if (DES_set_key_checked(&deskey[0],&data(ctx)->ks1) 245 !! DES_set_key_checked(&deskey[1],&data(ctx)->ks2)) 246 return 0; 247 #else 248 DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1); 249 DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2); 250 #endif 251 memcpy(&data(ctx)->ks3,&data(ctx)->ks1, 252 sizeof(data(ctx)->ks1)); 253 return 1; 254 } 255 256 static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 257 const unsigned char *iv, int enc) 258 { 259 DES_cblock *deskey = (DES_cblock *)key; 260 #ifdef KSSL_DEBUG 261 { 262 int i; 263 printf("des_ede3_init_key(ctx=%lx)\n", ctx); 264 printf("\tKEY= "); 265 for(i=0;i<24;i++) printf("%02X",key[i]); printf("\n"); 266 printf("\t IV= "); 267 for(i=0;i<8;i++) printf("%02X",iv[i]); printf("\n"); 268 } 269 #endif /* KSSL_DEBUG */ 270 271 #ifdef EVP_CHECK_DES_KEY 272 if (DES_set_key_checked(&deskey[0],&data(ctx)->ks1) 273 || DES_set_key_checked(&deskey[1],&data(ctx)->ks2) 274 || DES_set_key_checked(&deskey[2],&data(ctx)->ks3)) 275 return 0; 276 #else 277 DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1); 278 DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2); 279 DES_set_key_unchecked(&deskey[2],&data(ctx)->ks3); 280 #endif 281 return 1; 282 } 283 284 static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) 285 { 286 287 DES_cblock *deskey = ptr; 288 289 switch(type) 290 { 291 case EVP_CTRL_RAND_KEY: 292 if (RAND_bytes(ptr, c->key_len) <= 0) 293 return 0; 294 DES_set_odd_parity(deskey); 295 if (c->key_len >= 16) 296 DES_set_odd_parity(deskey + 1); 297 if (c->key_len >= 24) 298 DES_set_odd_parity(deskey + 2); 299 return 1; 300 301 default: 302 return -1; 303 } 304 } 305 306 const EVP_CIPHER *EVP_des_ede(void) 307 { 308 return &des_ede_ecb; 309 } 310 311 const EVP_CIPHER *EVP_des_ede3(void) 312 { 313 return &des_ede3_ecb; 314 } 315 #endif 316 #endif 317
