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