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, unsigned int 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, unsigned int inl) 101 { 102 DES_ede3_ofb64_encrypt(in, out, (long)inl, 103 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 104 (DES_cblock *)ctx->iv, &ctx->num); 105 return 1; 106 } 107 108 static int des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 109 const unsigned char *in, unsigned int inl) 110 { 111 #ifdef KSSL_DEBUG 112 { 113 int i; 114 printf("des_ede_cbc_cipher(ctx=%lx, buflen=%d)\n", (unsigned long)ctx, ctx->buf_len); 115 printf("\t iv= "); 116 for(i=0;i<8;i++) 117 printf("%02X",ctx->iv[i]); 118 printf("\n"); 119 } 120 #endif /* KSSL_DEBUG */ 121 DES_ede3_cbc_encrypt(in, out, (long)inl, 122 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 123 (DES_cblock *)ctx->iv, ctx->encrypt); 124 return 1; 125 } 126 127 static int des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 128 const unsigned char *in, unsigned int inl) 129 { 130 DES_ede3_cfb64_encrypt(in, out, (long)inl, 131 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 132 (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt); 133 return 1; 134 } 135 136 /* Although we have a CFB-r implementation for 3-DES, it doesn't pack the right 137 way, so wrap it here */ 138 static int des_ede3_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 139 const unsigned char *in, unsigned int inl) 140 { 141 unsigned int n; 142 unsigned char c[1],d[1]; 143 144 for(n=0 ; n < inl ; ++n) 145 { 146 c[0]=(in[n/8]&(1 << (7-n%8))) ? 0x80 : 0; 147 DES_ede3_cfb_encrypt(c,d,1,1, 148 &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3, 149 (DES_cblock *)ctx->iv,ctx->encrypt); 150 out[n/8]=(out[n/8]&~(0x80 >> (n%8)))|((d[0]&0x80) >> (n%8)); 151 } 152 153 return 1; 154 } 155 156 static int des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 157 const unsigned char *in, unsigned int inl) 158 { 159 DES_ede3_cfb_encrypt(in,out,8,inl, 160 &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3, 161 (DES_cblock *)ctx->iv,ctx->encrypt); 162 return 1; 163 } 164 165 BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64, 166 EVP_CIPH_RAND_KEY|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1, 167 des_ede_init_key, 168 NULL, NULL, NULL, 169 des3_ctrl) 170 171 #define des_ede3_cfb64_cipher des_ede_cfb64_cipher 172 #define des_ede3_ofb_cipher des_ede_ofb_cipher 173 #define des_ede3_cbc_cipher des_ede_cbc_cipher 174 #define des_ede3_ecb_cipher des_ede_ecb_cipher 175 176 BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64, 177 EVP_CIPH_RAND_KEY|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1, 178 des_ede3_init_key, 179 NULL, NULL, NULL, 180 des3_ctrl) 181 182 BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,1, 183 EVP_CIPH_RAND_KEY|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1, 184 des_ede3_init_key, 185 NULL, NULL, NULL, 186 des3_ctrl) 187 188 BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,8, 189 EVP_CIPH_RAND_KEY|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1, 190 des_ede3_init_key, 191 NULL, NULL, NULL, 192 des3_ctrl) 193 194 static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 195 const unsigned char *iv, int enc) 196 { 197 DES_cblock *deskey = (DES_cblock *)key; 198 #ifdef EVP_CHECK_DES_KEY 199 if (DES_set_key_checked(&deskey[0],&data(ctx)->ks1) 200 !! DES_set_key_checked(&deskey[1],&data(ctx)->ks2)) 201 return 0; 202 #else 203 DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1); 204 DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2); 205 #endif 206 memcpy(&data(ctx)->ks3,&data(ctx)->ks1, 207 sizeof(data(ctx)->ks1)); 208 return 1; 209 } 210 211 static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 212 const unsigned char *iv, int enc) 213 { 214 DES_cblock *deskey = (DES_cblock *)key; 215 #ifdef KSSL_DEBUG 216 { 217 int i; 218 printf("des_ede3_init_key(ctx=%lx)\n", (unsigned long)ctx); 219 printf("\tKEY= "); 220 for(i=0;i<24;i++) printf("%02X",key[i]); printf("\n"); 221 printf("\t IV= "); 222 for(i=0;i<8;i++) printf("%02X",iv[i]); printf("\n"); 223 } 224 #endif /* KSSL_DEBUG */ 225 226 #ifdef EVP_CHECK_DES_KEY 227 if (DES_set_key_checked(&deskey[0],&data(ctx)->ks1) 228 || DES_set_key_checked(&deskey[1],&data(ctx)->ks2) 229 || DES_set_key_checked(&deskey[2],&data(ctx)->ks3)) 230 return 0; 231 #else 232 DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1); 233 DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2); 234 DES_set_key_unchecked(&deskey[2],&data(ctx)->ks3); 235 #endif 236 return 1; 237 } 238 239 static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) 240 { 241 242 DES_cblock *deskey = ptr; 243 244 switch(type) 245 { 246 case EVP_CTRL_RAND_KEY: 247 if (RAND_bytes(ptr, c->key_len) <= 0) 248 return 0; 249 DES_set_odd_parity(deskey); 250 if (c->key_len >= 16) 251 DES_set_odd_parity(deskey + 1); 252 if (c->key_len >= 24) 253 DES_set_odd_parity(deskey + 2); 254 return 1; 255 256 default: 257 return -1; 258 } 259 } 260 261 const EVP_CIPHER *EVP_des_ede(void) 262 { 263 return &des_ede_ecb; 264 } 265 266 const EVP_CIPHER *EVP_des_ede3(void) 267 { 268 return &des_ede3_ecb; 269 } 270 #endif 271
