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1 /* ---- SYMMETRIC KEY STUFF ----- |
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2 * |
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3 * We put each of the ciphers scheduled keys in their own structs then we put all of |
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4 * the key formats in one union. This makes the function prototypes easier to use. |
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5 */ |
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6 #ifdef BLOWFISH |
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7 struct blowfish_key { |
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8 ulong32 S[4][256]; |
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9 ulong32 K[18]; |
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10 }; |
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11 #endif |
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12 |
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13 #ifdef RC5 |
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14 struct rc5_key { |
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15 int rounds; |
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16 ulong32 K[50]; |
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17 }; |
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18 #endif |
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19 |
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20 #ifdef RC6 |
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21 struct rc6_key { |
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22 ulong32 K[44]; |
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23 }; |
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24 #endif |
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25 |
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26 #ifdef SAFERP |
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27 struct saferp_key { |
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28 unsigned char K[33][16]; |
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29 long rounds; |
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30 }; |
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31 #endif |
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32 |
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33 #ifdef RIJNDAEL |
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34 struct rijndael_key { |
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35 ulong32 eK[64], dK[64]; |
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36 int Nr; |
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37 }; |
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38 #endif |
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39 |
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40 #ifdef XTEA |
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41 struct xtea_key { |
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42 unsigned long A[32], B[32]; |
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43 }; |
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44 #endif |
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45 |
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46 #ifdef TWOFISH |
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47 #ifndef TWOFISH_SMALL |
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48 struct twofish_key { |
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49 ulong32 S[4][256], K[40]; |
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50 }; |
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51 #else |
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52 struct twofish_key { |
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53 ulong32 K[40]; |
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54 unsigned char S[32], start; |
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55 }; |
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56 #endif |
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57 #endif |
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58 |
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59 #ifdef SAFER |
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60 #define SAFER_K64_DEFAULT_NOF_ROUNDS 6 |
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61 #define SAFER_K128_DEFAULT_NOF_ROUNDS 10 |
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62 #define SAFER_SK64_DEFAULT_NOF_ROUNDS 8 |
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63 #define SAFER_SK128_DEFAULT_NOF_ROUNDS 10 |
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64 #define SAFER_MAX_NOF_ROUNDS 13 |
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65 #define SAFER_BLOCK_LEN 8 |
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66 #define SAFER_KEY_LEN (1 + SAFER_BLOCK_LEN * (1 + 2 * SAFER_MAX_NOF_ROUNDS)) |
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67 typedef unsigned char safer_block_t[SAFER_BLOCK_LEN]; |
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68 typedef unsigned char safer_key_t[SAFER_KEY_LEN]; |
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69 struct safer_key { safer_key_t key; }; |
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70 #endif |
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71 |
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72 #ifdef RC2 |
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73 struct rc2_key { unsigned xkey[64]; }; |
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74 #endif |
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75 |
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76 #ifdef DES |
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77 struct des_key { |
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78 ulong32 ek[32], dk[32]; |
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79 }; |
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80 |
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81 struct des3_key { |
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82 ulong32 ek[3][32], dk[3][32]; |
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83 }; |
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84 #endif |
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85 |
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86 #ifdef CAST5 |
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87 struct cast5_key { |
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88 ulong32 K[32], keylen; |
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89 }; |
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90 #endif |
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91 |
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92 #ifdef NOEKEON |
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93 struct noekeon_key { |
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94 ulong32 K[4], dK[4]; |
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95 }; |
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96 #endif |
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97 |
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98 #ifdef SKIPJACK |
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99 struct skipjack_key { |
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100 unsigned char key[10]; |
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101 }; |
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102 #endif |
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103 |
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104 typedef union Symmetric_key { |
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105 #ifdef DES |
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106 struct des_key des; |
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107 struct des3_key des3; |
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108 #endif |
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109 #ifdef RC2 |
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110 struct rc2_key rc2; |
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111 #endif |
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112 #ifdef SAFER |
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113 struct safer_key safer; |
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114 #endif |
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115 #ifdef TWOFISH |
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116 struct twofish_key twofish; |
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117 #endif |
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118 #ifdef BLOWFISH |
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119 struct blowfish_key blowfish; |
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120 #endif |
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121 #ifdef RC5 |
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122 struct rc5_key rc5; |
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123 #endif |
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124 #ifdef RC6 |
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125 struct rc6_key rc6; |
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126 #endif |
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127 #ifdef SAFERP |
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128 struct saferp_key saferp; |
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129 #endif |
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130 #ifdef RIJNDAEL |
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131 struct rijndael_key rijndael; |
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132 #endif |
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133 #ifdef XTEA |
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134 struct xtea_key xtea; |
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135 #endif |
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136 #ifdef CAST5 |
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137 struct cast5_key cast5; |
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138 #endif |
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139 #ifdef NOEKEON |
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140 struct noekeon_key noekeon; |
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141 #endif |
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142 #ifdef SKIPJACK |
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143 struct skipjack_key skipjack; |
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144 #endif |
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145 } symmetric_key; |
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146 |
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147 /* A block cipher ECB structure */ |
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148 typedef struct { |
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149 int cipher, blocklen; |
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150 symmetric_key key; |
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151 } symmetric_ECB; |
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152 |
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153 /* A block cipher CFB structure */ |
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154 typedef struct { |
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155 int cipher, blocklen, padlen; |
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156 unsigned char IV[MAXBLOCKSIZE], pad[MAXBLOCKSIZE]; |
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157 symmetric_key key; |
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158 } symmetric_CFB; |
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159 |
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160 /* A block cipher OFB structure */ |
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161 typedef struct { |
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162 int cipher, blocklen, padlen; |
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163 unsigned char IV[MAXBLOCKSIZE]; |
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164 symmetric_key key; |
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165 } symmetric_OFB; |
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166 |
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167 /* A block cipher CBC structure */ |
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168 typedef struct Symmetric_CBC { |
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169 int cipher, blocklen; |
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170 unsigned char IV[MAXBLOCKSIZE]; |
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171 symmetric_key key; |
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172 } symmetric_CBC; |
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173 |
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174 /* A block cipher CTR structure */ |
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175 typedef struct Symmetric_CTR { |
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176 int cipher, blocklen, padlen, mode; |
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177 unsigned char ctr[MAXBLOCKSIZE], pad[MAXBLOCKSIZE]; |
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178 symmetric_key key; |
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179 } symmetric_CTR; |
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180 |
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181 /* cipher descriptor table, last entry has "name == NULL" to mark the end of table */ |
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182 extern struct _cipher_descriptor { |
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183 char *name; |
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184 unsigned char ID; |
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185 int min_key_length, max_key_length, block_length, default_rounds; |
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186 int (*setup)(const unsigned char *key, int keylength, int num_rounds, symmetric_key *skey); |
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187 void (*ecb_encrypt)(const unsigned char *pt, unsigned char *ct, symmetric_key *key); |
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188 void (*ecb_decrypt)(const unsigned char *ct, unsigned char *pt, symmetric_key *key); |
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189 int (*test)(void); |
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190 int (*keysize)(int *desired_keysize); |
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191 } cipher_descriptor[]; |
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192 |
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193 #ifdef BLOWFISH |
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194 extern int blowfish_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey); |
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195 extern void blowfish_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *key); |
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196 extern void blowfish_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *key); |
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197 extern int blowfish_test(void); |
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198 extern int blowfish_keysize(int *desired_keysize); |
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199 extern const struct _cipher_descriptor blowfish_desc; |
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200 #endif |
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201 |
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202 #ifdef RC5 |
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203 extern int rc5_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey); |
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204 extern void rc5_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *key); |
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205 extern void rc5_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *key); |
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206 extern int rc5_test(void); |
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207 extern int rc5_keysize(int *desired_keysize); |
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208 extern const struct _cipher_descriptor rc5_desc; |
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209 #endif |
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210 |
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211 #ifdef RC6 |
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212 extern int rc6_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey); |
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213 extern void rc6_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *key); |
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214 extern void rc6_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *key); |
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215 extern int rc6_test(void); |
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216 extern int rc6_keysize(int *desired_keysize); |
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217 extern const struct _cipher_descriptor rc6_desc; |
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218 #endif |
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219 |
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220 #ifdef RC2 |
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221 extern int rc2_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey); |
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222 extern void rc2_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *key); |
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223 extern void rc2_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *key); |
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224 extern int rc2_test(void); |
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225 extern int rc2_keysize(int *desired_keysize); |
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226 extern const struct _cipher_descriptor rc2_desc; |
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227 #endif |
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228 |
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229 #ifdef SAFERP |
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230 extern int saferp_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey); |
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231 extern void saferp_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *key); |
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232 extern void saferp_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *key); |
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233 extern int saferp_test(void); |
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234 extern int saferp_keysize(int *desired_keysize); |
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235 extern const struct _cipher_descriptor saferp_desc; |
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236 #endif |
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237 |
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238 #ifdef SAFER |
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239 extern int safer_k64_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey); |
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240 extern int safer_sk64_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey); |
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241 extern int safer_k128_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey); |
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242 extern int safer_sk128_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey); |
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243 extern void safer_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *key); |
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244 extern void safer_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *key); |
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245 |
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246 extern int safer_k64_test(void); |
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247 extern int safer_sk64_test(void); |
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248 extern int safer_sk128_test(void); |
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249 |
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250 extern int safer_64_keysize(int *desired_keysize); |
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251 extern int safer_128_keysize(int *desired_keysize); |
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252 extern const struct _cipher_descriptor safer_k64_desc, safer_k128_desc, safer_sk64_desc, safer_sk128_desc; |
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253 #endif |
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254 |
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255 #ifdef RIJNDAEL |
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256 |
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257 /* make aes an alias */ |
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258 #define aes_setup rijndael_setup |
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259 #define aes_ecb_encrypt rijndael_ecb_encrypt |
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260 #define aes_ecb_decrypt rijndael_ecb_decrypt |
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261 #define aes_test rijndael_test |
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262 #define aes_keysize rijndael_keysize |
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263 |
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264 #define aes_enc_setup rijndael_enc_setup |
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265 #define aes_enc_ecb_encrypt rijndael_enc_ecb_encrypt |
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266 #define aes_enc_keysize rijndael_enc_keysize |
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267 |
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268 extern int rijndael_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey); |
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269 extern void rijndael_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *key); |
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270 extern void rijndael_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *key); |
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271 extern int rijndael_test(void); |
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272 extern int rijndael_keysize(int *desired_keysize); |
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273 |
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274 extern int rijndael_enc_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey); |
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275 extern void rijndael_enc_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *key); |
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276 extern int rijndael_enc_keysize(int *desired_keysize); |
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277 |
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278 extern const struct _cipher_descriptor rijndael_desc, aes_desc; |
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279 extern const struct _cipher_descriptor rijndael_enc_desc, aes_enc_desc; |
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280 #endif |
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281 |
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282 #ifdef XTEA |
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283 extern int xtea_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey); |
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284 extern void xtea_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *key); |
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285 extern void xtea_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *key); |
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286 extern int xtea_test(void); |
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287 extern int xtea_keysize(int *desired_keysize); |
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288 extern const struct _cipher_descriptor xtea_desc; |
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289 #endif |
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290 |
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291 #ifdef TWOFISH |
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292 extern int twofish_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey); |
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293 extern void twofish_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *key); |
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294 extern void twofish_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *key); |
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295 extern int twofish_test(void); |
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296 extern int twofish_keysize(int *desired_keysize); |
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297 extern const struct _cipher_descriptor twofish_desc; |
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298 #endif |
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299 |
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300 #ifdef DES |
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301 extern int des_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey); |
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302 extern void des_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *key); |
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303 extern void des_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *key); |
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304 extern int des_test(void); |
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305 extern int des_keysize(int *desired_keysize); |
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306 |
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307 extern int des3_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey); |
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308 extern void des3_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *key); |
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309 extern void des3_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *key); |
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310 extern int des3_test(void); |
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311 extern int des3_keysize(int *desired_keysize); |
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312 |
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313 extern const struct _cipher_descriptor des_desc, des3_desc; |
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314 #endif |
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315 |
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316 #ifdef CAST5 |
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317 extern int cast5_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey); |
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318 extern void cast5_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *key); |
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319 extern void cast5_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *key); |
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320 extern int cast5_test(void); |
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321 extern int cast5_keysize(int *desired_keysize); |
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322 extern const struct _cipher_descriptor cast5_desc; |
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323 #endif |
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324 |
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325 #ifdef NOEKEON |
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326 extern int noekeon_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey); |
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327 extern void noekeon_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *key); |
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328 extern void noekeon_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *key); |
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329 extern int noekeon_test(void); |
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330 extern int noekeon_keysize(int *desired_keysize); |
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331 extern const struct _cipher_descriptor noekeon_desc; |
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332 #endif |
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333 |
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334 #ifdef SKIPJACK |
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335 extern int skipjack_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey); |
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336 extern void skipjack_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *key); |
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337 extern void skipjack_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *key); |
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338 extern int skipjack_test(void); |
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339 extern int skipjack_keysize(int *desired_keysize); |
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340 extern const struct _cipher_descriptor skipjack_desc; |
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341 #endif |
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342 |
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343 #ifdef ECB |
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344 extern int ecb_start(int cipher, const unsigned char *key, |
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345 int keylen, int num_rounds, symmetric_ECB *ecb); |
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346 extern int ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_ECB *ecb); |
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347 extern int ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_ECB *ecb); |
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348 #endif |
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349 |
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350 #ifdef CFB |
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351 extern int cfb_start(int cipher, const unsigned char *IV, const unsigned char *key, |
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352 int keylen, int num_rounds, symmetric_CFB *cfb); |
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353 extern int cfb_encrypt(const unsigned char *pt, unsigned char *ct, unsigned long len, symmetric_CFB *cfb); |
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354 extern int cfb_decrypt(const unsigned char *ct, unsigned char *pt, unsigned long len, symmetric_CFB *cfb); |
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355 extern int cfb_getiv(unsigned char *IV, unsigned long *len, symmetric_CFB *cfb); |
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356 extern int cfb_setiv(const unsigned char *IV, unsigned long len, symmetric_CFB *cfb); |
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357 #endif |
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358 |
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359 #ifdef OFB |
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360 extern int ofb_start(int cipher, const unsigned char *IV, const unsigned char *key, |
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361 int keylen, int num_rounds, symmetric_OFB *ofb); |
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362 extern int ofb_encrypt(const unsigned char *pt, unsigned char *ct, unsigned long len, symmetric_OFB *ofb); |
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363 extern int ofb_decrypt(const unsigned char *ct, unsigned char *pt, unsigned long len, symmetric_OFB *ofb); |
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364 extern int ofb_getiv(unsigned char *IV, unsigned long *len, symmetric_OFB *ofb); |
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365 extern int ofb_setiv(const unsigned char *IV, unsigned long len, symmetric_OFB *ofb); |
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366 #endif |
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367 |
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368 #ifdef CBC |
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369 extern int cbc_start(int cipher, const unsigned char *IV, const unsigned char *key, |
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370 int keylen, int num_rounds, symmetric_CBC *cbc); |
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371 extern int cbc_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_CBC *cbc); |
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372 extern int cbc_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_CBC *cbc); |
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373 extern int cbc_getiv(unsigned char *IV, unsigned long *len, symmetric_CBC *cbc); |
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374 extern int cbc_setiv(const unsigned char *IV, unsigned long len, symmetric_CBC *cbc); |
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375 #endif |
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376 |
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377 #ifdef CTR |
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378 extern int ctr_start(int cipher, const unsigned char *IV, const unsigned char *key, |
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379 int keylen, int num_rounds, symmetric_CTR *ctr); |
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380 extern int ctr_encrypt(const unsigned char *pt, unsigned char *ct, unsigned long len, symmetric_CTR *ctr); |
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381 extern int ctr_decrypt(const unsigned char *ct, unsigned char *pt, unsigned long len, symmetric_CTR *ctr); |
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382 extern int ctr_getiv(unsigned char *IV, unsigned long *len, symmetric_CTR *ctr); |
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383 extern int ctr_setiv(const unsigned char *IV, unsigned long len, symmetric_CTR *ctr); |
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384 #endif |
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385 |
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386 |
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387 |
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388 extern int find_cipher(const char *name); |
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389 extern int find_cipher_any(const char *name, int blocklen, int keylen); |
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390 extern int find_cipher_id(unsigned char ID); |
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391 |
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392 extern int register_cipher(const struct _cipher_descriptor *cipher); |
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393 extern int unregister_cipher(const struct _cipher_descriptor *cipher); |
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394 |
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395 extern int cipher_is_valid(int idx); |
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396 |
