prosody
1d13f73af58e
util-src/hashes.c

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util-src/hashes.c @ 5901:1d13f73af58e

certmanager: Default to using the server's cipher preference order by default, as clients have been shown to commonly select weak and insecure ciphers even when they support stronger ones
author Matthew Wild <mwild1@gmail.com>
date Sat, 09 Nov 2013 17:50:19 +0000
parent 5774:6ef79af0c445
child 6411:6c8f6364bc48
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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
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19 #ifdef _MSC_VER
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20 typedef unsigned __int32 uint32_t;
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21 #else
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22 #include <inttypes.h>
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23 #endif
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24
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25 #include "lua.h"
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26 #include "lauxlib.h"
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27 #include <openssl/sha.h>
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28 #include <openssl/md5.h>
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29
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30 #define HMAC_IPAD 0x36363636
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31 #define HMAC_OPAD 0x5c5c5c5c
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32
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33 const char *hex_tab = "0123456789abcdef";
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34 void toHex(const unsigned char *in, int length, unsigned char *out) {
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35 int i;
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36 for (i = 0; i < length; i++) {
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37 out[i*2] = hex_tab[(in[i] >> 4) & 0xF];
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38 out[i*2+1] = hex_tab[(in[i]) & 0xF];
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39 }
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40 }
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41
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42 #define MAKE_HASH_FUNCTION(myFunc, func, size) \
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43 static int myFunc(lua_State *L) { \
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44 size_t len; \
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45 const char *s = luaL_checklstring(L, 1, &len); \
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46 int hex_out = lua_toboolean(L, 2); \
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47 unsigned char hash[size], result[size*2]; \
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48 func((const unsigned char*)s, len, hash); \
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49 if (hex_out) { \
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50 toHex(hash, size, result); \
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51 lua_pushlstring(L, (char*)result, size*2); \
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52 } else { \
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53 lua_pushlstring(L, (char*)hash, size);\
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54 } \
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55 return 1; \
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56 }
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57
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58 MAKE_HASH_FUNCTION(Lsha1, SHA1, SHA_DIGEST_LENGTH)
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59 MAKE_HASH_FUNCTION(Lsha224, SHA224, SHA224_DIGEST_LENGTH)
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60 MAKE_HASH_FUNCTION(Lsha256, SHA256, SHA256_DIGEST_LENGTH)
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61 MAKE_HASH_FUNCTION(Lsha384, SHA384, SHA384_DIGEST_LENGTH)
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62 MAKE_HASH_FUNCTION(Lsha512, SHA512, SHA512_DIGEST_LENGTH)
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63 MAKE_HASH_FUNCTION(Lmd5, MD5, MD5_DIGEST_LENGTH)
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64
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65 struct hash_desc {
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66 int (*Init)(void*);
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67 int (*Update)(void*, const void *, size_t);
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68 int (*Final)(unsigned char*, void*);
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69 size_t digestLength;
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70 void *ctx, *ctxo;
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71 };
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72
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73 static void hmac(struct hash_desc *desc, const char *key, size_t key_len,
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74 const char *msg, size_t msg_len, unsigned char *result)
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75 {
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76 union xory {
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77 unsigned char bytes[64];
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78 uint32_t quadbytes[16];
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79 };
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80
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81 int i;
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82 unsigned char hashedKey[64]; /* Maximum used digest length */
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83 union xory k_ipad, k_opad;
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84
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85 if (key_len > 64) {
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86 desc->Init(desc->ctx);
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87 desc->Update(desc->ctx, key, key_len);
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88 desc->Final(hashedKey, desc->ctx);
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89 key = (const char*)hashedKey;
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90 key_len = desc->digestLength;
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91 }
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92
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93 memcpy(k_ipad.bytes, key, key_len);
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94 memset(k_ipad.bytes + key_len, 0, 64 - key_len);
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95 memcpy(k_opad.bytes, k_ipad.bytes, 64);
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96
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97 for (i = 0; i < 16; i++) {
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98 k_ipad.quadbytes[i] ^= HMAC_IPAD;
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99 k_opad.quadbytes[i] ^= HMAC_OPAD;
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100 }
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101
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102 desc->Init(desc->ctx);
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103 desc->Update(desc->ctx, k_ipad.bytes, 64);
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104 desc->Init(desc->ctxo);
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105 desc->Update(desc->ctxo, k_opad.bytes, 64);
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106 desc->Update(desc->ctx, msg, msg_len);
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107 desc->Final(result, desc->ctx);
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108 desc->Update(desc->ctxo, result, desc->digestLength);
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109 desc->Final(result, desc->ctxo);
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110 }
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111
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112 #define MAKE_HMAC_FUNCTION(myFunc, func, size, type) \
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113 static int myFunc(lua_State *L) { \
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114 type ctx, ctxo; \
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115 unsigned char hash[size], result[2*size]; \
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116 size_t key_len, msg_len; \
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117 const char *key = luaL_checklstring(L, 1, &key_len); \
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118 const char *msg = luaL_checklstring(L, 2, &msg_len); \
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119 const int hex_out = lua_toboolean(L, 3); \
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120 struct hash_desc desc; \
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121 desc.Init = (int (*)(void*))func##_Init; \
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122 desc.Update = (int (*)(void*, const void *, size_t))func##_Update; \
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123 desc.Final = (int (*)(unsigned char*, void*))func##_Final; \
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124 desc.digestLength = size; \
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125 desc.ctx = &ctx; \
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126 desc.ctxo = &ctxo; \
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127 hmac(&desc, key, key_len, msg, msg_len, hash); \
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128 if (hex_out) { \
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129 toHex(hash, size, result); \
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130 lua_pushlstring(L, (char*)result, size*2); \
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131 } else { \
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132 lua_pushlstring(L, (char*)hash, size); \
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133 } \
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134 return 1; \
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135 }
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136
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137 MAKE_HMAC_FUNCTION(Lhmac_sha1, SHA1, SHA_DIGEST_LENGTH, SHA_CTX)
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138 MAKE_HMAC_FUNCTION(Lhmac_sha256, SHA256, SHA256_DIGEST_LENGTH, SHA256_CTX)
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139 MAKE_HMAC_FUNCTION(Lhmac_sha512, SHA512, SHA512_DIGEST_LENGTH, SHA512_CTX)
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140 MAKE_HMAC_FUNCTION(Lhmac_md5, MD5, MD5_DIGEST_LENGTH, MD5_CTX)
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141
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142 static int LscramHi(lua_State *L) {
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143 union xory {
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144 unsigned char bytes[SHA_DIGEST_LENGTH];
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145 uint32_t quadbytes[SHA_DIGEST_LENGTH/4];
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146 };
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147 int i;
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148 SHA_CTX ctx, ctxo;
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149 unsigned char Ust[SHA_DIGEST_LENGTH];
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150 union xory Und;
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151 union xory res;
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152 size_t str_len, salt_len;
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153 struct hash_desc desc;
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154 const char *str = luaL_checklstring(L, 1, &str_len);
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155 const char *salt = luaL_checklstring(L, 2, &salt_len);
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156 char *salt2;
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157 const int iter = luaL_checkinteger(L, 3);
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158
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159 desc.Init = (int (*)(void*))SHA1_Init;
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160 desc.Update = (int (*)(void*, const void *, size_t))SHA1_Update;
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161 desc.Final = (int (*)(unsigned char*, void*))SHA1_Final;
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162 desc.digestLength = SHA_DIGEST_LENGTH;
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163 desc.ctx = &ctx;
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164 desc.ctxo = &ctxo;
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165
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166 salt2 = malloc(salt_len + 4);
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167 if (salt2 == NULL)
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168 luaL_error(L, "Out of memory in scramHi");
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169 memcpy(salt2, salt, salt_len);
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170 memcpy(salt2 + salt_len, "\0\0\0\1", 4);
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171 hmac(&desc, str, str_len, salt2, salt_len + 4, Ust);
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172 free(salt2);
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173
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174 memcpy(res.bytes, Ust, sizeof(res));
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175 for (i = 1; i < iter; i++) {
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176 int j;
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177 hmac(&desc, str, str_len, (char*)Ust, sizeof(Ust), Und.bytes);
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178 for (j = 0; j < SHA_DIGEST_LENGTH/4; j++)
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179 res.quadbytes[j] ^= Und.quadbytes[j];
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180 memcpy(Ust, Und.bytes, sizeof(Ust));
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181 }
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182
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183 lua_pushlstring(L, (char*)res.bytes, SHA_DIGEST_LENGTH);
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184
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185 return 1;
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186 }
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187
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188 static const luaL_Reg Reg[] =
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189 {
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190 { "sha1", Lsha1 },
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191 { "sha224", Lsha224 },
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192 { "sha256", Lsha256 },
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193 { "sha384", Lsha384 },
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194 { "sha512", Lsha512 },
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195 { "md5", Lmd5 },
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196 { "hmac_sha1", Lhmac_sha1 },
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197 { "hmac_sha256", Lhmac_sha256 },
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198 { "hmac_sha512", Lhmac_sha512 },
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199 { "hmac_md5", Lhmac_md5 },
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200 { "scram_Hi_sha1", LscramHi },
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201 { NULL, NULL }
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202 };
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203
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204 LUALIB_API int luaopen_util_hashes(lua_State *L)
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205 {
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206 luaL_register(L, "hashes", Reg);
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207 lua_pushliteral(L, "version"); /** version */
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208 lua_pushliteral(L, "-3.14");
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209 lua_settable(L,-3);
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210 return 1;
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211 }