1/* crypto/evp/e_des.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 68typedef struct { 69 union { 70 double align; 71 DES_key_schedule ks; 72 } ks; 73 union { 74 void (*cbc) (const void *, void *, size_t, 75 const DES_key_schedule *, unsigned char *); 76 } stream; 77} EVP_DES_KEY; 78 79# if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__)) 80/* ----------^^^ this is not a typo, just a way to detect that 81 * assembler support was in general requested... */ 82# include "sparc_arch.h" 83 84extern unsigned int OPENSSL_sparcv9cap_P[]; 85 86# define SPARC_DES_CAPABLE (OPENSSL_sparcv9cap_P[1] & CFR_DES) 87 88void des_t4_key_expand(const void *key, DES_key_schedule *ks); 89void des_t4_cbc_encrypt(const void *inp, void *out, size_t len, 90 const DES_key_schedule *ks, unsigned char iv[8]); 91void des_t4_cbc_decrypt(const void *inp, void *out, size_t len, 92 const DES_key_schedule *ks, unsigned char iv[8]); 93# endif 94 95static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 96 const unsigned char *iv, int enc); 97static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); 98 99/* 100 * Because of various casts and different names can't use 101 * IMPLEMENT_BLOCK_CIPHER 102 */ 103 104static int des_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 105 const unsigned char *in, size_t inl) 106{ 107 BLOCK_CIPHER_ecb_loop() 108 DES_ecb_encrypt((DES_cblock *)(in + i), (DES_cblock *)(out + i), 109 ctx->cipher_data, ctx->encrypt); 110 return 1; 111} 112 113static int des_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 114 const unsigned char *in, size_t inl) 115{ 116 while (inl >= EVP_MAXCHUNK) { 117 DES_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data, 118 (DES_cblock *)ctx->iv, &ctx->num); 119 inl -= EVP_MAXCHUNK; 120 in += EVP_MAXCHUNK; 121 out += EVP_MAXCHUNK; 122 } 123 if (inl) 124 DES_ofb64_encrypt(in, out, (long)inl, ctx->cipher_data, 125 (DES_cblock *)ctx->iv, &ctx->num); 126 return 1; 127} 128 129static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 130 const unsigned char *in, size_t inl) 131{ 132 EVP_DES_KEY *dat = (EVP_DES_KEY *) ctx->cipher_data; 133 134 if (dat->stream.cbc != NULL) { 135 (*dat->stream.cbc) (in, out, inl, &dat->ks.ks, ctx->iv); 136 return 1; 137 } 138 while (inl >= EVP_MAXCHUNK) { 139 DES_ncbc_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data, 140 (DES_cblock *)ctx->iv, ctx->encrypt); 141 inl -= EVP_MAXCHUNK; 142 in += EVP_MAXCHUNK; 143 out += EVP_MAXCHUNK; 144 } 145 if (inl) 146 DES_ncbc_encrypt(in, out, (long)inl, ctx->cipher_data, 147 (DES_cblock *)ctx->iv, ctx->encrypt); 148 return 1; 149} 150 151static int des_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 152 const unsigned char *in, size_t inl) 153{ 154 while (inl >= EVP_MAXCHUNK) { 155 DES_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data, 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_cfb64_encrypt(in, out, (long)inl, ctx->cipher_data, 163 (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt); 164 return 1; 165} 166 167/* 168 * Although we have a CFB-r implementation for DES, it doesn't pack the right 169 * way, so wrap it here 170 */ 171static int des_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 172 const unsigned char *in, size_t inl) 173{ 174 size_t n, chunk = EVP_MAXCHUNK / 8; 175 unsigned char c[1], d[1]; 176 177 if (inl < chunk) 178 chunk = inl; 179 180 while (inl && inl >= chunk) { 181 for (n = 0; n < chunk * 8; ++n) { 182 c[0] = (in[n / 8] & (1 << (7 - n % 8))) ? 0x80 : 0; 183 DES_cfb_encrypt(c, d, 1, 1, ctx->cipher_data, 184 (DES_cblock *)ctx->iv, ctx->encrypt); 185 out[n / 8] = 186 (out[n / 8] & ~(0x80 >> (unsigned int)(n % 8))) | 187 ((d[0] & 0x80) >> (unsigned int)(n % 8)); 188 } 189 inl -= chunk; 190 in += chunk; 191 out += chunk; 192 if (inl < chunk) 193 chunk = inl; 194 } 195 196 return 1; 197} 198 199static int des_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 200 const unsigned char *in, size_t inl) 201{ 202 while (inl >= EVP_MAXCHUNK) { 203 DES_cfb_encrypt(in, out, 8, (long)EVP_MAXCHUNK, ctx->cipher_data, 204 (DES_cblock *)ctx->iv, ctx->encrypt); 205 inl -= EVP_MAXCHUNK; 206 in += EVP_MAXCHUNK; 207 out += EVP_MAXCHUNK; 208 } 209 if (inl) 210 DES_cfb_encrypt(in, out, 8, (long)inl, ctx->cipher_data, 211 (DES_cblock *)ctx->iv, ctx->encrypt); 212 return 1; 213} 214 215BLOCK_CIPHER_defs(des, EVP_DES_KEY, NID_des, 8, 8, 8, 64, 216 EVP_CIPH_RAND_KEY, des_init_key, NULL, 217 EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl) 218 219 BLOCK_CIPHER_def_cfb(des, EVP_DES_KEY, NID_des, 8, 8, 1, 220 EVP_CIPH_RAND_KEY, des_init_key, NULL, 221 EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl) 222 223 BLOCK_CIPHER_def_cfb(des, EVP_DES_KEY, NID_des, 8, 8, 8, 224 EVP_CIPH_RAND_KEY, des_init_key, NULL, 225 EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl) 226 227static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 228 const unsigned char *iv, int enc) 229{ 230 DES_cblock *deskey = (DES_cblock *)key; 231 EVP_DES_KEY *dat = (EVP_DES_KEY *) ctx->cipher_data; 232 233 dat->stream.cbc = NULL; 234# if defined(SPARC_DES_CAPABLE) 235 if (SPARC_DES_CAPABLE) { 236 int mode = ctx->cipher->flags & EVP_CIPH_MODE; 237 238 if (mode == EVP_CIPH_CBC_MODE) { 239 des_t4_key_expand(key, &dat->ks.ks); 240 dat->stream.cbc = enc ? des_t4_cbc_encrypt : des_t4_cbc_decrypt; 241 return 1; 242 } 243 } 244# endif 245# ifdef EVP_CHECK_DES_KEY 246 if (DES_set_key_checked(deskey, dat->ks.ks) != 0) 247 return 0; 248# else 249 DES_set_key_unchecked(deskey, ctx->cipher_data); 250# endif 251 return 1; 252} 253 254static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) 255{ 256 257 switch (type) { 258 case EVP_CTRL_RAND_KEY: 259 if (RAND_bytes(ptr, 8) <= 0) 260 return 0; 261 DES_set_odd_parity((DES_cblock *)ptr); 262 return 1; 263 264 default: 265 return -1; 266 } 267} 268 269#endif 270