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1 /* crypto/evp/e_des3.c */ |
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2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
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3 * All rights reserved. |
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4 * |
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5 * This package is an SSL implementation written |
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6 * by Eric Young (eay@cryptsoft.com). |
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7 * The implementation was written so as to conform with Netscapes SSL. |
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8 * |
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9 * This library is free for commercial and non-commercial use as long as |
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10 * the following conditions are aheared to. The following conditions |
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11 * apply to all code found in this distribution, be it the RC4, RSA, |
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12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
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13 * included with this distribution is covered by the same copyright terms |
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14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
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15 * |
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16 * Copyright remains Eric Young's, and as such any Copyright notices in |
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17 * the code are not to be removed. |
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18 * If this package is used in a product, Eric Young should be given attribution |
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19 * as the author of the parts of the library used. |
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20 * This can be in the form of a textual message at program startup or |
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21 * in documentation (online or textual) provided with the package. |
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22 * |
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23 * Redistribution and use in source and binary forms, with or without |
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24 * modification, are permitted provided that the following conditions |
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25 * are met: |
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26 * 1. Redistributions of source code must retain the copyright |
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27 * notice, this list of conditions and the following disclaimer. |
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28 * 2. Redistributions in binary form must reproduce the above copyright |
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29 * notice, this list of conditions and the following disclaimer in the |
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30 * documentation and/or other materials provided with the distribution. |
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31 * 3. All advertising materials mentioning features or use of this software |
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32 * must display the following acknowledgement: |
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33 * "This product includes cryptographic software written by |
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34 * Eric Young (eay@cryptsoft.com)" |
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35 * The word 'cryptographic' can be left out if the rouines from the library |
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36 * being used are not cryptographic related :-). |
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37 * 4. If you include any Windows specific code (or a derivative thereof) from |
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38 * the apps directory (application code) you must include an acknowledgement: |
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39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
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40 * |
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41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
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42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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51 * SUCH DAMAGE. |
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52 * |
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53 * The licence and distribution terms for any publically available version or |
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54 * derivative of this code cannot be changed. i.e. this code cannot simply be |
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55 * copied and put under another distribution licence |
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56 * [including the GNU Public Licence.] |
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57 */ |
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58 |
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59 #include <stdio.h> |
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60 #include "cryptlib.h" |
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61 #ifndef OPENSSL_NO_DES |
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62 #include <openssl/evp.h> |
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63 #include <openssl/objects.h> |
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64 #include "evp_locl.h" |
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65 #include <openssl/des.h> |
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66 #include <openssl/rand.h> |
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67 |
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68 static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
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69 const unsigned char *iv,int enc); |
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70 |
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71 static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
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72 const unsigned char *iv,int enc); |
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73 |
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74 static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); |
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75 |
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76 typedef struct |
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77 { |
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78 DES_key_schedule ks1;/* key schedule */ |
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79 DES_key_schedule ks2;/* key schedule (for ede) */ |
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80 DES_key_schedule ks3;/* key schedule (for ede3) */ |
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81 } DES_EDE_KEY; |
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82 |
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83 #define data(ctx) ((DES_EDE_KEY *)(ctx)->cipher_data) |
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84 |
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85 /* Because of various casts and different args can't use IMPLEMENT_BLOCK_CIPHER */ |
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86 |
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87 static int des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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88 const unsigned char *in, unsigned int inl) |
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89 { |
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90 BLOCK_CIPHER_ecb_loop() |
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91 DES_ecb3_encrypt((const_DES_cblock *)(in + i), |
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92 (DES_cblock *)(out + i), |
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93 &data(ctx)->ks1, &data(ctx)->ks2, |
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94 &data(ctx)->ks3, |
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95 ctx->encrypt); |
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96 return 1; |
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97 } |
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98 |
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99 static int des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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100 const unsigned char *in, unsigned int inl) |
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101 { |
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102 DES_ede3_ofb64_encrypt(in, out, (long)inl, |
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103 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, |
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104 (DES_cblock *)ctx->iv, &ctx->num); |
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105 return 1; |
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106 } |
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107 |
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108 static int des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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109 const unsigned char *in, unsigned int inl) |
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110 { |
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111 #ifdef KSSL_DEBUG |
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112 { |
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113 int i; |
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114 char *cp; |
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115 printf("des_ede_cbc_cipher(ctx=%lx, buflen=%d)\n", ctx, ctx->buf_len); |
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116 printf("\t iv= "); |
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117 for(i=0;i<8;i++) |
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118 printf("%02X",ctx->iv[i]); |
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119 printf("\n"); |
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120 } |
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121 #endif /* KSSL_DEBUG */ |
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122 DES_ede3_cbc_encrypt(in, out, (long)inl, |
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123 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, |
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124 (DES_cblock *)ctx->iv, ctx->encrypt); |
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125 return 1; |
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126 } |
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127 |
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128 static int des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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129 const unsigned char *in, unsigned int inl) |
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130 { |
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131 DES_ede3_cfb64_encrypt(in, out, (long)inl, |
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132 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, |
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133 (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt); |
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134 return 1; |
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135 } |
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136 |
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137 /* Although we have a CFB-r implementation for 3-DES, it doesn't pack the right |
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138 way, so wrap it here */ |
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139 static int des_ede3_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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140 const unsigned char *in, unsigned int inl) |
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141 { |
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142 unsigned int n; |
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143 unsigned char c[1],d[1]; |
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144 |
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145 for(n=0 ; n < inl ; ++n) |
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146 { |
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147 c[0]=(in[n/8]&(1 << (7-n%8))) ? 0x80 : 0; |
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148 DES_ede3_cfb_encrypt(c,d,1,1, |
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149 &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3, |
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150 (DES_cblock *)ctx->iv,ctx->encrypt); |
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151 out[n/8]=(out[n/8]&~(0x80 >> (n%8)))|((d[0]&0x80) >> (n%8)); |
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152 } |
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153 |
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154 return 1; |
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155 } |
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156 |
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157 static int des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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158 const unsigned char *in, unsigned int inl) |
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159 { |
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160 DES_ede3_cfb_encrypt(in,out,8,inl, |
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161 &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3, |
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162 (DES_cblock *)ctx->iv,ctx->encrypt); |
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163 return 1; |
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164 } |
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165 |
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166 BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64, |
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167 EVP_CIPH_RAND_KEY, des_ede_init_key, NULL, |
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168 EVP_CIPHER_set_asn1_iv, |
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169 EVP_CIPHER_get_asn1_iv, |
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170 des3_ctrl) |
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171 |
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172 #define des_ede3_cfb64_cipher des_ede_cfb64_cipher |
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173 #define des_ede3_ofb_cipher des_ede_ofb_cipher |
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174 #define des_ede3_cbc_cipher des_ede_cbc_cipher |
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175 #define des_ede3_ecb_cipher des_ede_ecb_cipher |
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176 |
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177 BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64, |
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178 EVP_CIPH_RAND_KEY, des_ede3_init_key, NULL, |
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179 EVP_CIPHER_set_asn1_iv, |
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180 EVP_CIPHER_get_asn1_iv, |
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181 des3_ctrl) |
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182 |
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183 BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,1, |
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184 EVP_CIPH_RAND_KEY, des_ede3_init_key,NULL, |
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185 EVP_CIPHER_set_asn1_iv, |
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186 EVP_CIPHER_get_asn1_iv, |
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187 des3_ctrl) |
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188 |
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189 BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,8, |
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190 EVP_CIPH_RAND_KEY, des_ede3_init_key,NULL, |
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191 EVP_CIPHER_set_asn1_iv, |
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192 EVP_CIPHER_get_asn1_iv, |
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193 des3_ctrl) |
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194 |
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195 static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
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196 const unsigned char *iv, int enc) |
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197 { |
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198 DES_cblock *deskey = (DES_cblock *)key; |
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199 #ifdef EVP_CHECK_DES_KEY |
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200 if (DES_set_key_checked(&deskey[0],&data(ctx)->ks1) |
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201 !! DES_set_key_checked(&deskey[1],&data(ctx)->ks2)) |
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202 return 0; |
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203 #else |
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204 DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1); |
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205 DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2); |
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206 #endif |
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207 memcpy(&data(ctx)->ks3,&data(ctx)->ks1, |
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208 sizeof(data(ctx)->ks1)); |
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209 return 1; |
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210 } |
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211 |
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212 static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
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213 const unsigned char *iv, int enc) |
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214 { |
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215 DES_cblock *deskey = (DES_cblock *)key; |
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216 #ifdef KSSL_DEBUG |
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217 { |
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218 int i; |
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219 printf("des_ede3_init_key(ctx=%lx)\n", ctx); |
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220 printf("\tKEY= "); |
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221 for(i=0;i<24;i++) printf("%02X",key[i]); printf("\n"); |
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222 printf("\t IV= "); |
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223 for(i=0;i<8;i++) printf("%02X",iv[i]); printf("\n"); |
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224 } |
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225 #endif /* KSSL_DEBUG */ |
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226 |
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227 #ifdef EVP_CHECK_DES_KEY |
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228 if (DES_set_key_checked(&deskey[0],&data(ctx)->ks1) |
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229 || DES_set_key_checked(&deskey[1],&data(ctx)->ks2) |
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230 || DES_set_key_checked(&deskey[2],&data(ctx)->ks3)) |
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231 return 0; |
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232 #else |
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233 DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1); |
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234 DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2); |
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235 DES_set_key_unchecked(&deskey[2],&data(ctx)->ks3); |
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236 #endif |
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237 return 1; |
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238 } |
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239 |
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240 static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) |
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241 { |
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242 |
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243 DES_cblock *deskey = ptr; |
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244 |
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245 switch(type) |
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246 { |
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247 case EVP_CTRL_RAND_KEY: |
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248 if (RAND_bytes(ptr, c->key_len) <= 0) |
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249 return 0; |
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250 DES_set_odd_parity(deskey); |
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251 if (c->key_len >= 16) |
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252 DES_set_odd_parity(deskey + 1); |
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253 if (c->key_len >= 24) |
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254 DES_set_odd_parity(deskey + 2); |
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255 return 1; |
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256 |
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257 default: |
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258 return -1; |
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259 } |
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260 } |
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261 |
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262 EXPORT_C const EVP_CIPHER *EVP_des_ede(void) |
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263 { |
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264 return &des_ede_ecb; |
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265 } |
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266 |
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267 EXPORT_C const EVP_CIPHER *EVP_des_ede3(void) |
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268 { |
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269 return &des_ede3_ecb; |
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270 } |
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271 #endif |