1 /* 2 * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the OpenSSL license (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10 #include <stdio.h> 11 #include "internal/cryptlib.h" 12 #ifndef OPENSSL_NO_DES 13 # include <openssl/evp.h> 14 # include <openssl/objects.h> 15 # include "crypto/evp.h" 16 # include <openssl/des.h> 17 # include <openssl/rand.h> 18 19 typedef struct { 20 union { 21 double align; 22 DES_key_schedule ks; 23 } ks; 24 union { 25 void (*cbc) (const void *, void *, size_t, 26 const DES_key_schedule *, unsigned char *); 27 } stream; 28 } EVP_DES_KEY; 29 30 # if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__)) 31 /* ----------^^^ this is not a typo, just a way to detect that 32 * assembler support was in general requested... */ 33 # include "sparc_arch.h" 34 35 extern unsigned int OPENSSL_sparcv9cap_P[]; 36 37 # define SPARC_DES_CAPABLE (OPENSSL_sparcv9cap_P[1] & CFR_DES) 38 39 void des_t4_key_expand(const void *key, DES_key_schedule *ks); 40 void des_t4_cbc_encrypt(const void *inp, void *out, size_t len, 41 const DES_key_schedule *ks, unsigned char iv[8]); 42 void des_t4_cbc_decrypt(const void *inp, void *out, size_t len, 43 const DES_key_schedule *ks, unsigned char iv[8]); 44 # endif 45 46 static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 47 const unsigned char *iv, int enc); 48 static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); 49 50 /* 51 * Because of various casts and different names can't use 52 * IMPLEMENT_BLOCK_CIPHER 53 */ 54 55 static int des_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 56 const unsigned char *in, size_t inl) 57 { 58 BLOCK_CIPHER_ecb_loop() 59 DES_ecb_encrypt((DES_cblock *)(in + i), (DES_cblock *)(out + i), 60 EVP_CIPHER_CTX_get_cipher_data(ctx), 61 EVP_CIPHER_CTX_encrypting(ctx)); 62 return 1; 63 } 64 65 static int des_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 66 const unsigned char *in, size_t inl) 67 { 68 while (inl >= EVP_MAXCHUNK) { 69 int num = EVP_CIPHER_CTX_num(ctx); 70 DES_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK, 71 EVP_CIPHER_CTX_get_cipher_data(ctx), 72 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), &num); 73 EVP_CIPHER_CTX_set_num(ctx, num); 74 inl -= EVP_MAXCHUNK; 75 in += EVP_MAXCHUNK; 76 out += EVP_MAXCHUNK; 77 } 78 if (inl) { 79 int num = EVP_CIPHER_CTX_num(ctx); 80 DES_ofb64_encrypt(in, out, (long)inl, 81 EVP_CIPHER_CTX_get_cipher_data(ctx), 82 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), &num); 83 EVP_CIPHER_CTX_set_num(ctx, num); 84 } 85 return 1; 86 } 87 88 static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 89 const unsigned char *in, size_t inl) 90 { 91 EVP_DES_KEY *dat = (EVP_DES_KEY *) EVP_CIPHER_CTX_get_cipher_data(ctx); 92 93 if (dat->stream.cbc != NULL) { 94 (*dat->stream.cbc) (in, out, inl, &dat->ks.ks, 95 EVP_CIPHER_CTX_iv_noconst(ctx)); 96 return 1; 97 } 98 while (inl >= EVP_MAXCHUNK) { 99 DES_ncbc_encrypt(in, out, (long)EVP_MAXCHUNK, 100 EVP_CIPHER_CTX_get_cipher_data(ctx), 101 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), 102 EVP_CIPHER_CTX_encrypting(ctx)); 103 inl -= EVP_MAXCHUNK; 104 in += EVP_MAXCHUNK; 105 out += EVP_MAXCHUNK; 106 } 107 if (inl) 108 DES_ncbc_encrypt(in, out, (long)inl, 109 EVP_CIPHER_CTX_get_cipher_data(ctx), 110 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), 111 EVP_CIPHER_CTX_encrypting(ctx)); 112 return 1; 113 } 114 115 static int des_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 116 const unsigned char *in, size_t inl) 117 { 118 while (inl >= EVP_MAXCHUNK) { 119 int num = EVP_CIPHER_CTX_num(ctx); 120 DES_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK, 121 EVP_CIPHER_CTX_get_cipher_data(ctx), 122 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), &num, 123 EVP_CIPHER_CTX_encrypting(ctx)); 124 EVP_CIPHER_CTX_set_num(ctx, num); 125 inl -= EVP_MAXCHUNK; 126 in += EVP_MAXCHUNK; 127 out += EVP_MAXCHUNK; 128 } 129 if (inl) { 130 int num = EVP_CIPHER_CTX_num(ctx); 131 DES_cfb64_encrypt(in, out, (long)inl, 132 EVP_CIPHER_CTX_get_cipher_data(ctx), 133 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), &num, 134 EVP_CIPHER_CTX_encrypting(ctx)); 135 EVP_CIPHER_CTX_set_num(ctx, num); 136 } 137 return 1; 138 } 139 140 /* 141 * Although we have a CFB-r implementation for DES, it doesn't pack the right 142 * way, so wrap it here 143 */ 144 static int des_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 145 const unsigned char *in, size_t inl) 146 { 147 size_t n, chunk = EVP_MAXCHUNK / 8; 148 unsigned char c[1], d[1]; 149 150 if (inl < chunk) 151 chunk = inl; 152 153 while (inl && inl >= chunk) { 154 for (n = 0; n < chunk * 8; ++n) { 155 c[0] = (in[n / 8] & (1 << (7 - n % 8))) ? 0x80 : 0; 156 DES_cfb_encrypt(c, d, 1, 1, EVP_CIPHER_CTX_get_cipher_data(ctx), 157 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), 158 EVP_CIPHER_CTX_encrypting(ctx)); 159 out[n / 8] = 160 (out[n / 8] & ~(0x80 >> (unsigned int)(n % 8))) | 161 ((d[0] & 0x80) >> (unsigned int)(n % 8)); 162 } 163 inl -= chunk; 164 in += chunk; 165 out += chunk; 166 if (inl < chunk) 167 chunk = inl; 168 } 169 170 return 1; 171 } 172 173 static int des_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 174 const unsigned char *in, size_t inl) 175 { 176 while (inl >= EVP_MAXCHUNK) { 177 DES_cfb_encrypt(in, out, 8, (long)EVP_MAXCHUNK, 178 EVP_CIPHER_CTX_get_cipher_data(ctx), 179 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), 180 EVP_CIPHER_CTX_encrypting(ctx)); 181 inl -= EVP_MAXCHUNK; 182 in += EVP_MAXCHUNK; 183 out += EVP_MAXCHUNK; 184 } 185 if (inl) 186 DES_cfb_encrypt(in, out, 8, (long)inl, 187 EVP_CIPHER_CTX_get_cipher_data(ctx), 188 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), 189 EVP_CIPHER_CTX_encrypting(ctx)); 190 return 1; 191 } 192 193 BLOCK_CIPHER_defs(des, EVP_DES_KEY, NID_des, 8, 8, 8, 64, 194 EVP_CIPH_RAND_KEY, des_init_key, NULL, 195 EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl) 196 197 BLOCK_CIPHER_def_cfb(des, EVP_DES_KEY, NID_des, 8, 8, 1, 198 EVP_CIPH_RAND_KEY, des_init_key, NULL, 199 EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl) 200 201 BLOCK_CIPHER_def_cfb(des, EVP_DES_KEY, NID_des, 8, 8, 8, 202 EVP_CIPH_RAND_KEY, des_init_key, NULL, 203 EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl) 204 205 static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 206 const unsigned char *iv, int enc) 207 { 208 DES_cblock *deskey = (DES_cblock *)key; 209 EVP_DES_KEY *dat = (EVP_DES_KEY *) EVP_CIPHER_CTX_get_cipher_data(ctx); 210 211 dat->stream.cbc = NULL; 212 # if defined(SPARC_DES_CAPABLE) 213 if (SPARC_DES_CAPABLE) { 214 int mode = EVP_CIPHER_CTX_mode(ctx); 215 216 if (mode == EVP_CIPH_CBC_MODE) { 217 des_t4_key_expand(key, &dat->ks.ks); 218 dat->stream.cbc = enc ? des_t4_cbc_encrypt : des_t4_cbc_decrypt; 219 return 1; 220 } 221 } 222 # endif 223 DES_set_key_unchecked(deskey, EVP_CIPHER_CTX_get_cipher_data(ctx)); 224 return 1; 225 } 226 227 static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) 228 { 229 230 switch (type) { 231 case EVP_CTRL_RAND_KEY: 232 if (RAND_priv_bytes(ptr, 8) <= 0) 233 return 0; 234 DES_set_odd_parity((DES_cblock *)ptr); 235 return 1; 236 237 default: 238 return -1; 239 } 240 } 241 242 #endif 243