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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 |
520 | 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 | -- |
520 | 8 | */ |
9 | ||
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 | |
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18 | #include "lua.h" |
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19 | #include "lauxlib.h" |
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20 | #include <openssl/sha.h> |
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21 | #include <openssl/md5.h> |
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22 | |
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23 | const char* hex_tab = "0123456789abcdef"; |
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24 | void toHex(const char* in, int length, char* out) { |
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25 | int i; |
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26 | for (i = 0; i < length; i++) { |
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27 | out[i*2] = hex_tab[(in[i] >> 4) & 0xF]; |
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28 | out[i*2+1] = hex_tab[(in[i]) & 0xF]; |
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29 | } |
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30 | } |
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31 | |
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32 | #define MAKE_HASH_FUNCTION(myFunc, func, size) \ |
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33 | static int myFunc(lua_State *L) { \ |
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34 | size_t len; \ |
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35 | const char *s = luaL_checklstring(L, 1, &len); \ |
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36 | int hex_out = lua_toboolean(L, 2); \ |
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37 | char hash[size]; \ |
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38 | char result[size*2]; \ |
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39 | func((const unsigned char*)s, len, (unsigned char*)hash); \ |
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40 | if (hex_out) { \ |
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41 | toHex(hash, size, result); \ |
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42 | lua_pushlstring(L, result, size*2); \ |
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43 | } else { \ |
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44 | lua_pushlstring(L, hash, size);\ |
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45 | } \ |
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46 | return 1; \ |
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47 | } |
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48 | |
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49 | MAKE_HASH_FUNCTION(Lsha1, SHA1, 20) |
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50 | MAKE_HASH_FUNCTION(Lsha256, SHA256, 32) |
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51 | MAKE_HASH_FUNCTION(Lmd5, MD5, 16) |
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52 | |
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53 | static const luaL_Reg Reg[] = |
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54 | { |
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55 | { "sha1", Lsha1 }, |
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56 | { "sha256", Lsha256 }, |
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57 | { "md5", Lmd5 }, |
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58 | { NULL, NULL } |
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59 | }; |
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60 | |
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61 | LUALIB_API int luaopen_util_hashes(lua_State *L) |
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62 | { |
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63 | luaL_register(L, "hashes", Reg); |
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64 | lua_pushliteral(L, "version"); /** version */ |
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65 | lua_pushliteral(L, "-3.14"); |
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66 | lua_settable(L,-3); |
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67 | return 1; |
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68 | } |