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1 /* crypto/evp/e_des.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_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 static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); |
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71 |
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72 /* Because of various casts and different names can't use IMPLEMENT_BLOCK_CIPHER */ |
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73 |
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74 static int des_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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75 const unsigned char *in, unsigned int inl) |
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76 { |
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77 BLOCK_CIPHER_ecb_loop() |
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78 DES_ecb_encrypt((DES_cblock *)(in + i), (DES_cblock *)(out + i), ctx->cipher_data, ctx->encrypt); |
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79 return 1; |
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80 } |
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81 |
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82 static int des_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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83 const unsigned char *in, unsigned int inl) |
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84 { |
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85 DES_ofb64_encrypt(in, out, (long)inl, ctx->cipher_data, (DES_cblock *)ctx->iv, &ctx->num); |
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86 return 1; |
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87 } |
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88 |
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89 static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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90 const unsigned char *in, unsigned int inl) |
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91 { |
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92 DES_ncbc_encrypt(in, out, (long)inl, ctx->cipher_data, |
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93 (DES_cblock *)ctx->iv, ctx->encrypt); |
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94 return 1; |
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95 } |
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96 |
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97 static int des_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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98 const unsigned char *in, unsigned int inl) |
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99 { |
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100 DES_cfb64_encrypt(in, out, (long)inl, ctx->cipher_data, |
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101 (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt); |
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102 return 1; |
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103 } |
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104 |
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105 /* Although we have a CFB-r implementation for DES, it doesn't pack the right |
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106 way, so wrap it here */ |
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107 static int des_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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108 const unsigned char *in, unsigned int inl) |
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109 { |
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110 unsigned int n; |
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111 unsigned char c[1],d[1]; |
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112 |
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113 for(n=0 ; n < inl ; ++n) |
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114 { |
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115 c[0]=(in[n/8]&(1 << (7-n%8))) ? 0x80 : 0; |
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116 DES_cfb_encrypt(c,d,1,1,ctx->cipher_data,(DES_cblock *)ctx->iv, |
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117 ctx->encrypt); |
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118 out[n/8]=(out[n/8]&~(0x80 >> (n%8)))|((d[0]&0x80) >> (n%8)); |
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119 } |
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120 return 1; |
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121 } |
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122 |
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123 static int des_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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124 const unsigned char *in, unsigned int inl) |
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125 { |
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126 DES_cfb_encrypt(in,out,8,inl,ctx->cipher_data,(DES_cblock *)ctx->iv, |
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127 ctx->encrypt); |
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128 return 1; |
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129 } |
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130 |
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131 BLOCK_CIPHER_defs(des, DES_key_schedule, NID_des, 8, 8, 8, 64, |
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132 EVP_CIPH_RAND_KEY, des_init_key, NULL, |
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133 EVP_CIPHER_set_asn1_iv, |
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134 EVP_CIPHER_get_asn1_iv, |
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135 des_ctrl) |
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136 |
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137 BLOCK_CIPHER_def_cfb(des,DES_key_schedule,NID_des,8,8,1, |
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138 EVP_CIPH_RAND_KEY, des_init_key,NULL, |
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139 EVP_CIPHER_set_asn1_iv, |
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140 EVP_CIPHER_get_asn1_iv,des_ctrl) |
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141 |
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142 BLOCK_CIPHER_def_cfb(des,DES_key_schedule,NID_des,8,8,8, |
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143 EVP_CIPH_RAND_KEY,des_init_key,NULL, |
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144 EVP_CIPHER_set_asn1_iv, |
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145 EVP_CIPHER_get_asn1_iv,des_ctrl) |
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146 |
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147 static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
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148 const unsigned char *iv, int enc) |
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149 { |
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150 DES_cblock *deskey = (DES_cblock *)key; |
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151 #ifdef EVP_CHECK_DES_KEY |
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152 if(DES_set_key_checked(deskey,ctx->cipher_data) != 0) |
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153 return 0; |
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154 #else |
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155 DES_set_key_unchecked(deskey,ctx->cipher_data); |
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156 #endif |
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157 return 1; |
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158 } |
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159 |
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160 static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) |
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161 { |
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162 |
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163 switch(type) |
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164 { |
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165 case EVP_CTRL_RAND_KEY: |
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166 if (RAND_bytes(ptr, 8) <= 0) |
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167 return 0; |
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168 DES_set_odd_parity((DES_cblock *)ptr); |
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169 return 1; |
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170 |
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171 default: |
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172 return -1; |
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173 } |
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174 } |
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175 |
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176 #endif |