prosody
39ee70fbb009
util-src/hashes.c

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util-src/hashes.c @ 9751:39ee70fbb009

mod_mam: Perform message expiry based on building an index by date For each day, store a set of users that have new messages. To expire messages, we collect the union of sets of users from dates that fall outside the cleanup range. The previous algoritm did not work well with many users, especially with the default settings.
author Kim Alvefur <zash@zash.se>
date Thu, 03 Jan 2019 17:25:43 +0100
parent 7889:b8d694646597
child 9957:c8cfd2a5845c
child 9962:29bc3dff3419
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rev   line source
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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
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29 #if (LUA_VERSION_NUM == 501)
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30 #define luaL_setfuncs(L, R, N) luaL_register(L, NULL, R)
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31 #endif
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32
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33 #define HMAC_IPAD 0x36363636
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34 #define HMAC_OPAD 0x5c5c5c5c
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35
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36 const char *hex_tab = "0123456789abcdef";
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37 void toHex(const unsigned char *in, int length, unsigned char *out) {
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38 int i;
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39
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40 for(i = 0; i < length; i++) {
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41 out[i * 2] = hex_tab[(in[i] >> 4) & 0xF];
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42 out[i * 2 + 1] = hex_tab[(in[i]) & 0xF];
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43 }
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44 }
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45
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46 #define MAKE_HASH_FUNCTION(myFunc, func, size) \
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47 static int myFunc(lua_State *L) { \
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48 size_t len; \
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49 const char *s = luaL_checklstring(L, 1, &len); \
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50 int hex_out = lua_toboolean(L, 2); \
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51 unsigned char hash[size], result[size*2]; \
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52 func((const unsigned char*)s, len, hash); \
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53 if (hex_out) { \
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54 toHex(hash, size, result); \
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55 lua_pushlstring(L, (char*)result, size*2); \
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56 } else { \
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57 lua_pushlstring(L, (char*)hash, size);\
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58 } \
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59 return 1; \
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60 }
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61
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62 MAKE_HASH_FUNCTION(Lsha1, SHA1, SHA_DIGEST_LENGTH)
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63 MAKE_HASH_FUNCTION(Lsha224, SHA224, SHA224_DIGEST_LENGTH)
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64 MAKE_HASH_FUNCTION(Lsha256, SHA256, SHA256_DIGEST_LENGTH)
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65 MAKE_HASH_FUNCTION(Lsha384, SHA384, SHA384_DIGEST_LENGTH)
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66 MAKE_HASH_FUNCTION(Lsha512, SHA512, SHA512_DIGEST_LENGTH)
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67 MAKE_HASH_FUNCTION(Lmd5, MD5, MD5_DIGEST_LENGTH)
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68
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69 struct hash_desc {
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70 int (*Init)(void *);
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71 int (*Update)(void *, const void *, size_t);
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72 int (*Final)(unsigned char *, void *);
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73 size_t digestLength;
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74 void *ctx, *ctxo;
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75 };
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76
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77 static void hmac(struct hash_desc *desc, const char *key, size_t key_len,
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78 const char *msg, size_t msg_len, unsigned char *result) {
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79 union xory {
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80 unsigned char bytes[64];
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81 uint32_t quadbytes[16];
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82 };
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83
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84 int i;
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85 unsigned char hashedKey[64]; /* Maximum used digest length */
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86 union xory k_ipad, k_opad;
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87
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88 if(key_len > 64) {
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89 desc->Init(desc->ctx);
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90 desc->Update(desc->ctx, key, key_len);
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91 desc->Final(hashedKey, desc->ctx);
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92 key = (const char *)hashedKey;
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93 key_len = desc->digestLength;
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94 }
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95
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96 memcpy(k_ipad.bytes, key, key_len);
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97 memset(k_ipad.bytes + key_len, 0, 64 - key_len);
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98 memcpy(k_opad.bytes, k_ipad.bytes, 64);
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99
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100 for(i = 0; i < 16; i++) {
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101 k_ipad.quadbytes[i] ^= HMAC_IPAD;
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102 k_opad.quadbytes[i] ^= HMAC_OPAD;
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103 }
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104
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105 desc->Init(desc->ctx);
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106 desc->Update(desc->ctx, k_ipad.bytes, 64);
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107 desc->Init(desc->ctxo);
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108 desc->Update(desc->ctxo, k_opad.bytes, 64);
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109 desc->Update(desc->ctx, msg, msg_len);
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110 desc->Final(result, desc->ctx);
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111 desc->Update(desc->ctxo, result, desc->digestLength);
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112 desc->Final(result, desc->ctxo);
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113 }
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114
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115 #define MAKE_HMAC_FUNCTION(myFunc, func, size, type) \
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116 static int myFunc(lua_State *L) { \
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117 type ctx, ctxo; \
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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 const char *key = luaL_checklstring(L, 1, &key_len); \
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121 const char *msg = luaL_checklstring(L, 2, &msg_len); \
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122 const int hex_out = lua_toboolean(L, 3); \
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123 struct hash_desc desc; \
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124 desc.Init = (int (*)(void*))func##_Init; \
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125 desc.Update = (int (*)(void*, const void *, size_t))func##_Update; \
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126 desc.Final = (int (*)(unsigned char*, void*))func##_Final; \
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127 desc.digestLength = size; \
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128 desc.ctx = &ctx; \
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129 desc.ctxo = &ctxo; \
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130 hmac(&desc, key, key_len, msg, msg_len, hash); \
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131 if (hex_out) { \
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132 toHex(hash, size, result); \
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133 lua_pushlstring(L, (char*)result, size*2); \
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134 } else { \
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135 lua_pushlstring(L, (char*)hash, size); \
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136 } \
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137 return 1; \
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138 }
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139
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140 MAKE_HMAC_FUNCTION(Lhmac_sha1, SHA1, SHA_DIGEST_LENGTH, SHA_CTX)
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141 MAKE_HMAC_FUNCTION(Lhmac_sha256, SHA256, SHA256_DIGEST_LENGTH, SHA256_CTX)
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142 MAKE_HMAC_FUNCTION(Lhmac_sha512, SHA512, SHA512_DIGEST_LENGTH, SHA512_CTX)
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143 MAKE_HMAC_FUNCTION(Lhmac_md5, MD5, MD5_DIGEST_LENGTH, MD5_CTX)
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144
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145 static int LscramHi(lua_State *L) {
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146 union xory {
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147 unsigned char bytes[SHA_DIGEST_LENGTH];
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148 uint32_t quadbytes[SHA_DIGEST_LENGTH / 4];
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149 };
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150 int i;
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151 SHA_CTX ctx, ctxo;
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152 unsigned char Ust[SHA_DIGEST_LENGTH];
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153 union xory Und;
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154 union xory res;
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155 size_t str_len, salt_len;
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156 struct hash_desc desc;
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157 const char *str = luaL_checklstring(L, 1, &str_len);
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158 const char *salt = luaL_checklstring(L, 2, &salt_len);
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159 char *salt2;
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160 const int iter = luaL_checkinteger(L, 3);
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161
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162 desc.Init = (int (*)(void *))SHA1_Init;
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163 desc.Update = (int (*)(void *, const void *, size_t))SHA1_Update;
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164 desc.Final = (int (*)(unsigned char *, void *))SHA1_Final;
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165 desc.digestLength = SHA_DIGEST_LENGTH;
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166 desc.ctx = &ctx;
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167 desc.ctxo = &ctxo;
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168
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169 salt2 = malloc(salt_len + 4);
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170
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171 if(salt2 == NULL) {
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172 return luaL_error(L, "Out of memory in scramHi");
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173 }
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174
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175 memcpy(salt2, salt, salt_len);
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176 memcpy(salt2 + salt_len, "\0\0\0\1", 4);
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177 hmac(&desc, str, str_len, salt2, salt_len + 4, Ust);
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178 free(salt2);
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179
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180 memcpy(res.bytes, Ust, sizeof(res));
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181
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182 for(i = 1; i < iter; i++) {
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183 int j;
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184 hmac(&desc, str, str_len, (char *)Ust, sizeof(Ust), Und.bytes);
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185
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186 for(j = 0; j < SHA_DIGEST_LENGTH / 4; j++) {
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187 res.quadbytes[j] ^= Und.quadbytes[j];
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188 }
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189
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190 memcpy(Ust, Und.bytes, sizeof(Ust));
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191 }
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192
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193 lua_pushlstring(L, (char *)res.bytes, SHA_DIGEST_LENGTH);
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194
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195 return 1;
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196 }
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197
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198 static const luaL_Reg Reg[] = {
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199 { "sha1", Lsha1 },
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200 { "sha224", Lsha224 },
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201 { "sha256", Lsha256 },
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202 { "sha384", Lsha384 },
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203 { "sha512", Lsha512 },
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204 { "md5", Lmd5 },
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205 { "hmac_sha1", Lhmac_sha1 },
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206 { "hmac_sha256", Lhmac_sha256 },
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207 { "hmac_sha512", Lhmac_sha512 },
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208 { "hmac_md5", Lhmac_md5 },
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209 { "scram_Hi_sha1", LscramHi },
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210 { NULL, NULL }
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211 };
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212
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213 LUALIB_API int luaopen_util_hashes(lua_State *L) {
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214 #if (LUA_VERSION_NUM > 501)
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215 luaL_checkversion(L);
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216 #endif
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217 lua_newtable(L);
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218 luaL_setfuncs(L, Reg, 0);;
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433a5226267f Licensing/version updates for some files (forgot to commit, doh...)
Matthew Wild <mwild1@gmail.com>
parents: 520
diff changeset
219 lua_pushliteral(L, "-3.14");
6412
0e94f89d0e62 util-src/*.c: Use the more concise lua_setfield
Kim Alvefur <zash@zash.se>
parents: 6411
diff changeset
220 lua_setfield(L, -2, "version");
766
433a5226267f Licensing/version updates for some files (forgot to commit, doh...)
Matthew Wild <mwild1@gmail.com>
parents: 520
diff changeset
221 return 1;
433a5226267f Licensing/version updates for some files (forgot to commit, doh...)
Matthew Wild <mwild1@gmail.com>
parents: 520
diff changeset
222 }