prosody
e91db0aac408
util-src/hashes.c

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util-src/hashes.c @ 5554:e91db0aac408

Merge 0.9->trunk
author Matthew Wild <mwild1@gmail.com>
date Wed, 01 May 2013 13:45:42 +0100
parent 5538:62089c9c142d
child 5576:7656b9f06bb5
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1 /* Prosody IM
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2 -- Copyright (C) 2009-2010 Matthew Wild
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3 -- Copyright (C) 2009-2010 Waqas Hussain
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4 --
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8 */
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9
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10
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11 /*
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12 * hashes.c
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13 * Lua library for sha1, sha256 and md5 hashes
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14 */
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15
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16 #include <string.h>
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17 #include <stdlib.h>
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18 #include <inttypes.h>
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19
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20 #include "lua.h"
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21 #include "lauxlib.h"
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22 #include <openssl/sha.h>
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23 #include <openssl/md5.h>
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24
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25 #define HMAC_IPAD 0x36363636
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26 #define HMAC_OPAD 0x5c5c5c5c
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27
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28 const char *hex_tab = "0123456789abcdef";
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29 void toHex(const unsigned char *in, int length, unsigned char *out) {
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30 int i;
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31 for (i = 0; i < length; i++) {
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32 out[i*2] = hex_tab[(in[i] >> 4) & 0xF];
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33 out[i*2+1] = hex_tab[(in[i]) & 0xF];
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34 }
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35 }
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36
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37 #define MAKE_HASH_FUNCTION(myFunc, func, size) \
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38 static int myFunc(lua_State *L) { \
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39 size_t len; \
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40 const char *s = luaL_checklstring(L, 1, &len); \
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41 int hex_out = lua_toboolean(L, 2); \
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42 unsigned char hash[size], result[size*2]; \
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43 func((const unsigned char*)s, len, hash); \
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44 if (hex_out) { \
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45 toHex(hash, size, result); \
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46 lua_pushlstring(L, (char*)result, size*2); \
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47 } else { \
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48 lua_pushlstring(L, (char*)hash, size);\
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49 } \
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50 return 1; \
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51 }
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52
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53 MAKE_HASH_FUNCTION(Lsha1, SHA1, SHA_DIGEST_LENGTH)
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54 MAKE_HASH_FUNCTION(Lsha224, SHA224, SHA224_DIGEST_LENGTH)
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55 MAKE_HASH_FUNCTION(Lsha256, SHA256, SHA256_DIGEST_LENGTH)
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56 MAKE_HASH_FUNCTION(Lsha384, SHA384, SHA384_DIGEST_LENGTH)
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57 MAKE_HASH_FUNCTION(Lsha512, SHA512, SHA512_DIGEST_LENGTH)
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58 MAKE_HASH_FUNCTION(Lmd5, MD5, MD5_DIGEST_LENGTH)
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59
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60 struct hash_desc {
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61 int (*Init)(void*);
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62 int (*Update)(void*, const void *, size_t);
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63 int (*Final)(unsigned char*, void*);
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64 size_t digestLength;
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65 void *ctx, *ctxo;
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66 };
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67
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68 static void hmac(struct hash_desc *desc, const char *key, size_t key_len,
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69 const char *msg, size_t msg_len, unsigned char *result)
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70 {
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71 union xory {
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72 unsigned char bytes[64];
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73 uint32_t quadbytes[16];
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74 };
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75
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76 int i;
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77 char hashedKey[64]; /* Maximum used digest length */
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78 union xory k_ipad, k_opad;
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79
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80 if (key_len > 64) {
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81 desc->Init(desc->ctx);
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82 desc->Update(desc->ctx, key, key_len);
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83 desc->Final(desc->ctx, hashedKey);
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84 key = (const char*)hashedKey;
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85 key_len = desc->digestLength;
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86 }
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87
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88 memcpy(k_ipad.bytes, key, key_len);
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89 memset(k_ipad.bytes + key_len, 0, 64 - key_len);
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90 memcpy(k_opad.bytes, k_ipad.bytes, 64);
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91
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92 for (i = 0; i < 16; i++) {
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93 k_ipad.quadbytes[i] ^= HMAC_IPAD;
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94 k_opad.quadbytes[i] ^= HMAC_OPAD;
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95 }
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96
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97 desc->Init(desc->ctx);
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98 desc->Update(desc->ctx, k_ipad.bytes, 64);
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99 desc->Init(desc->ctxo);
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100 desc->Update(desc->ctxo, k_opad.bytes, 64);
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101 desc->Update(desc->ctx, msg, msg_len);
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102 desc->Final(result, desc->ctx);
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103 desc->Update(desc->ctxo, result, desc->digestLength);
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104 desc->Final(result, desc->ctxo);
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105 }
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106
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107 #define MAKE_HMAC_FUNCTION(myFunc, func, size, type) \
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108 static int myFunc(lua_State *L) { \
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109 type ctx, ctxo; \
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110 unsigned char hash[size], result[2*size]; \
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111 size_t key_len, msg_len; \
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112 const char *key = luaL_checklstring(L, 1, &key_len); \
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113 const char *msg = luaL_checklstring(L, 2, &msg_len); \
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114 const int hex_out = lua_toboolean(L, 3); \
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115 struct hash_desc desc; \
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116 desc.Init = (int (*)(void*))func##_Init; \
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117 desc.Update = (int (*)(void*, const void *, size_t))func##_Update; \
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118 desc.Final = (int (*)(unsigned char*, void*))func##_Final; \
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119 desc.digestLength = size; \
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120 desc.ctx = &ctx; \
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121 desc.ctxo = &ctxo; \
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122 hmac(&desc, key, key_len, msg, msg_len, hash); \
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123 if (hex_out) { \
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124 toHex(hash, size, result); \
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125 lua_pushlstring(L, (char*)result, size*2); \
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126 } else { \
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127 lua_pushlstring(L, (char*)hash, size); \
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128 } \
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129 return 1; \
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130 }
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131
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132 MAKE_HMAC_FUNCTION(Lhmac_sha1, SHA1, SHA_DIGEST_LENGTH, SHA_CTX)
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133 MAKE_HMAC_FUNCTION(Lhmac_sha256, SHA256, SHA256_DIGEST_LENGTH, SHA256_CTX)
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134 MAKE_HMAC_FUNCTION(Lhmac_sha512, SHA512, SHA512_DIGEST_LENGTH, SHA512_CTX)
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135 MAKE_HMAC_FUNCTION(Lhmac_md5, MD5, MD5_DIGEST_LENGTH, MD5_CTX)
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136
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137 static int LscramHi(lua_State *L) {
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138 union xory {
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139 unsigned char bytes[SHA_DIGEST_LENGTH];
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140 uint32_t quadbytes[SHA_DIGEST_LENGTH/4];
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141 };
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142 int i;
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143 SHA_CTX ctx, ctxo;
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144 unsigned char Ust[SHA_DIGEST_LENGTH];
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145 union xory Und;
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146 union xory res;
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147 size_t str_len, salt_len;
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148 struct hash_desc desc;
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149 const char *str = luaL_checklstring(L, 1, &str_len);
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150 const char *salt = luaL_checklstring(L, 2, &salt_len);
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151 char *salt2;
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152 const int iter = luaL_checkinteger(L, 3);
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153
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154 desc.Init = (int (*)(void*))SHA1_Init;
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155 desc.Update = (int (*)(void*, const void *, size_t))SHA1_Update;
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156 desc.Final = (int (*)(unsigned char*, void*))SHA1_Final;
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157 desc.digestLength = SHA_DIGEST_LENGTH;
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158 desc.ctx = &ctx;
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159 desc.ctxo = &ctxo;
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160
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161 salt2 = malloc(salt_len + 4);
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162 if (salt2 == NULL)
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163 luaL_error(L, "Out of memory in scramHi");
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164 memcpy(salt2, salt, salt_len);
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165 memcpy(salt2 + salt_len, "\0\0\0\1", 4);
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166 hmac(&desc, str, str_len, salt2, salt_len + 4, Ust);
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167 free(salt2);
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168
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169 memcpy(res.bytes, Ust, sizeof(res));
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170 for (i = 1; i < iter; i++) {
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171 int j;
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172 hmac(&desc, str, str_len, (char*)Ust, sizeof(Ust), Und.bytes);
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173 for (j = 0; j < SHA_DIGEST_LENGTH/4; j++)
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174 res.quadbytes[j] ^= Und.quadbytes[j];
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175 memcpy(Ust, Und.bytes, sizeof(Ust));
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176 }
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177
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178 lua_pushlstring(L, (char*)res.bytes, SHA_DIGEST_LENGTH);
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179
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180 return 1;
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181 }
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182
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183 static const luaL_Reg Reg[] =
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184 {
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185 { "sha1", Lsha1 },
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186 { "sha224", Lsha224 },
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187 { "sha256", Lsha256 },
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188 { "sha384", Lsha384 },
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189 { "sha512", Lsha512 },
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190 { "md5", Lmd5 },
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191 { "hmac_sha1", Lhmac_sha1 },
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192 { "hmac_sha256", Lhmac_sha256 },
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193 { "hmac_sha512", Lhmac_sha512 },
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194 { "hmac_md5", Lhmac_md5 },
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195 { "scram_Hi_sha1", LscramHi },
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196 { NULL, NULL }
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197 };
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198
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199 LUALIB_API int luaopen_util_hashes(lua_State *L)
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200 {
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201 luaL_register(L, "hashes", Reg);
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202 lua_pushliteral(L, "version"); /** version */
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203 lua_pushliteral(L, "-3.14");
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204 lua_settable(L,-3);
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205 return 1;
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206 }