prosody
85585910d468
util-src/hashes.c

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util-src/hashes.c @ 10646:85585910d468 0.11

mod_muc: Allow control over the server-admins-are-room-owners feature (see #1174)
author Matthew Wild <mwild1@gmail.com>
date Thu, 13 Feb 2020 14:27:12 +0000
parent 9962:29bc3dff3419
child 9963:90a3cd25f2ae
child 11541:13b84682518e
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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 * hashes.c
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12 * Lua library for sha1, sha256 and md5 hashes
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13 */
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14
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15 #include <string.h>
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16 #include <stdlib.h>
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17
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18 #ifdef _MSC_VER
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19 typedef unsigned __int32 uint32_t;
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20 #else
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21 #include <inttypes.h>
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22 #endif
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23
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24 #include "lua.h"
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25 #include "lauxlib.h"
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26 #include <openssl/sha.h>
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27 #include <openssl/md5.h>
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28 #include <openssl/hmac.h>
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29
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30 #if (LUA_VERSION_NUM == 501)
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31 #define luaL_setfuncs(L, R, N) luaL_register(L, NULL, R)
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32 #endif
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33
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34 #define HMAC_IPAD 0x36363636
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35 #define HMAC_OPAD 0x5c5c5c5c
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36
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37 const char *hex_tab = "0123456789abcdef";
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38 void toHex(const unsigned char *in, int length, unsigned char *out) {
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39 int i;
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41 for(i = 0; i < length; i++) {
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42 out[i * 2] = hex_tab[(in[i] >> 4) & 0xF];
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43 out[i * 2 + 1] = hex_tab[(in[i]) & 0xF];
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44 }
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45 }
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46
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47 #define MAKE_HASH_FUNCTION(myFunc, func, size) \
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48 static int myFunc(lua_State *L) { \
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49 size_t len; \
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50 const char *s = luaL_checklstring(L, 1, &len); \
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51 int hex_out = lua_toboolean(L, 2); \
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52 unsigned char hash[size], result[size*2]; \
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53 func((const unsigned char*)s, len, hash); \
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54 if (hex_out) { \
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55 toHex(hash, size, result); \
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56 lua_pushlstring(L, (char*)result, size*2); \
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57 } else { \
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58 lua_pushlstring(L, (char*)hash, size);\
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59 } \
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60 return 1; \
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61 }
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62
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63 MAKE_HASH_FUNCTION(Lsha1, SHA1, SHA_DIGEST_LENGTH)
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64 MAKE_HASH_FUNCTION(Lsha224, SHA224, SHA224_DIGEST_LENGTH)
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65 MAKE_HASH_FUNCTION(Lsha256, SHA256, SHA256_DIGEST_LENGTH)
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66 MAKE_HASH_FUNCTION(Lsha384, SHA384, SHA384_DIGEST_LENGTH)
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67 MAKE_HASH_FUNCTION(Lsha512, SHA512, SHA512_DIGEST_LENGTH)
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68 MAKE_HASH_FUNCTION(Lmd5, MD5, MD5_DIGEST_LENGTH)
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69
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70 struct hash_desc {
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71 int (*Init)(void *);
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72 int (*Update)(void *, const void *, size_t);
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73 int (*Final)(unsigned char *, void *);
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74 size_t digestLength;
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75 void *ctx, *ctxo;
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76 };
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77
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78 static void hmac(struct hash_desc *desc, const char *key, size_t key_len,
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79 const char *msg, size_t msg_len, unsigned char *result) {
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80 union xory {
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81 unsigned char bytes[64];
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82 uint32_t quadbytes[16];
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83 };
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84
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85 int i;
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86 unsigned char hashedKey[64]; /* Maximum used digest length */
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87 union xory k_ipad, k_opad;
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88
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89 if(key_len > 64) {
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90 desc->Init(desc->ctx);
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91 desc->Update(desc->ctx, key, key_len);
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92 desc->Final(hashedKey, desc->ctx);
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93 key = (const char *)hashedKey;
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94 key_len = desc->digestLength;
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95 }
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96
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97 memcpy(k_ipad.bytes, key, key_len);
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98 memset(k_ipad.bytes + key_len, 0, 64 - key_len);
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99 memcpy(k_opad.bytes, k_ipad.bytes, 64);
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100
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101 for(i = 0; i < 16; i++) {
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102 k_ipad.quadbytes[i] ^= HMAC_IPAD;
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103 k_opad.quadbytes[i] ^= HMAC_OPAD;
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104 }
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105
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106 desc->Init(desc->ctx);
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107 desc->Update(desc->ctx, k_ipad.bytes, 64);
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108 desc->Init(desc->ctxo);
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109 desc->Update(desc->ctxo, k_opad.bytes, 64);
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110 desc->Update(desc->ctx, msg, msg_len);
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111 desc->Final(result, desc->ctx);
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112 desc->Update(desc->ctxo, result, desc->digestLength);
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113 desc->Final(result, desc->ctxo);
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114 }
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115
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116 #define MAKE_HMAC_FUNCTION(myFunc, evp, size, type) \
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117 static int myFunc(lua_State *L) { \
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118 unsigned char hash[size], result[2*size]; \
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119 size_t key_len, msg_len; \
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120 unsigned int out_len; \
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121 const char *key = luaL_checklstring(L, 1, &key_len); \
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122 const char *msg = luaL_checklstring(L, 2, &msg_len); \
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123 const int hex_out = lua_toboolean(L, 3); \
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124 HMAC(evp(), key, key_len, (const unsigned char*)msg, msg_len, (unsigned char*)hash, &out_len); \
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125 if (hex_out) { \
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126 toHex(hash, out_len, result); \
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127 lua_pushlstring(L, (char*)result, out_len*2); \
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128 } else { \
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129 lua_pushlstring(L, (char*)hash, out_len); \
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130 } \
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131 return 1; \
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132 }
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133
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134 MAKE_HMAC_FUNCTION(Lhmac_sha1, EVP_sha1, SHA_DIGEST_LENGTH, SHA_CTX)
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135 MAKE_HMAC_FUNCTION(Lhmac_sha256, EVP_sha256, SHA256_DIGEST_LENGTH, SHA256_CTX)
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136 MAKE_HMAC_FUNCTION(Lhmac_sha512, EVP_sha512, SHA512_DIGEST_LENGTH, SHA512_CTX)
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137 MAKE_HMAC_FUNCTION(Lhmac_md5, EVP_md5, MD5_DIGEST_LENGTH, MD5_CTX)
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138
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139 static int LscramHi(lua_State *L) {
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140 union xory {
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141 unsigned char bytes[SHA_DIGEST_LENGTH];
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142 uint32_t quadbytes[SHA_DIGEST_LENGTH / 4];
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143 };
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144 int i;
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145 SHA_CTX ctx, ctxo;
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146 unsigned char Ust[SHA_DIGEST_LENGTH];
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147 union xory Und;
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148 union xory res;
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149 size_t str_len, salt_len;
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150 struct hash_desc desc;
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151 const char *str = luaL_checklstring(L, 1, &str_len);
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152 const char *salt = luaL_checklstring(L, 2, &salt_len);
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153 char *salt2;
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154 const int iter = luaL_checkinteger(L, 3);
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155
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156 desc.Init = (int (*)(void *))SHA1_Init;
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157 desc.Update = (int (*)(void *, const void *, size_t))SHA1_Update;
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158 desc.Final = (int (*)(unsigned char *, void *))SHA1_Final;
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159 desc.digestLength = SHA_DIGEST_LENGTH;
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160 desc.ctx = &ctx;
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161 desc.ctxo = &ctxo;
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162
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163 salt2 = malloc(salt_len + 4);
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164
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165 if(salt2 == NULL) {
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166 return luaL_error(L, "Out of memory in scramHi");
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167 }
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168
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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
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176 for(i = 1; i < iter; i++) {
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177 int j;
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178 hmac(&desc, str, str_len, (char *)Ust, sizeof(Ust), Und.bytes);
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179
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180 for(j = 0; j < SHA_DIGEST_LENGTH / 4; j++) {
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181 res.quadbytes[j] ^= Und.quadbytes[j];
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182 }
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183
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184 memcpy(Ust, Und.bytes, sizeof(Ust));
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185 }
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186
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187 lua_pushlstring(L, (char *)res.bytes, SHA_DIGEST_LENGTH);
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188
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189 return 1;
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190 }
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191
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192 static const luaL_Reg Reg[] = {
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193 { "sha1", Lsha1 },
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194 { "sha224", Lsha224 },
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195 { "sha256", Lsha256 },
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196 { "sha384", Lsha384 },
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197 { "sha512", Lsha512 },
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198 { "md5", Lmd5 },
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199 { "hmac_sha1", Lhmac_sha1 },
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200 { "hmac_sha256", Lhmac_sha256 },
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201 { "hmac_sha512", Lhmac_sha512 },
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202 { "hmac_md5", Lhmac_md5 },
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203 { "scram_Hi_sha1", LscramHi },
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204 { NULL, NULL }
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205 };
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206
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207 LUALIB_API int luaopen_util_hashes(lua_State *L) {
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208 #if (LUA_VERSION_NUM > 501)
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209 luaL_checkversion(L);
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210 #endif
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211 lua_newtable(L);
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212 luaL_setfuncs(L, Reg, 0);;
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213 lua_pushliteral(L, "-3.14");
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214 lua_setfield(L, -2, "version");
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215 return 1;
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216 }