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