prosody
8fac32810144
util-src/strbitop.c

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util-src/strbitop.c @ 12474:8fac32810144 0.12

mod_s2s: Improve robustness of outgoing s2s certificate verification This change ensures we have positively verified the certificates of the server we are connecting to before marking the session as authenticated. It protects against situations where the verify-or-close stage of the connection was interrupted (e.g. due to an uncaught error). Thanks to Zash for discovery and testing.
author Matthew Wild <mwild1@gmail.com>
date Mon, 25 Apr 2022 15:07:49 +0100
parent 11175:235537247aa3
child 12469:2b3adaa6d38e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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37a6a535343e util.strbitop: Library for bitwise operations on strings
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1 /*
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2 * This project is MIT licensed. Please see the
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3 * COPYING file in the source package for more information.
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4 *
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5 * Copyright (C) 2016 Kim Alvefur
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6 */
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7
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8 #include <lua.h>
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9 #include <lauxlib.h>
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10
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11 #if (LUA_VERSION_NUM == 501)
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12 #define luaL_setfuncs(L, R, N) luaL_register(L, NULL, R)
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13 #endif
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14
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15 /* TODO Deduplicate code somehow */
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16
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17 int strop_and(lua_State *L) {
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18 luaL_Buffer buf;
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19 size_t a, b, i;
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20 const char *str_a = luaL_checklstring(L, 1, &a);
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21 const char *str_b = luaL_checklstring(L, 2, &b);
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22
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23 luaL_buffinit(L, &buf);
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24
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25 if(a == 0 || b == 0) {
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26 lua_settop(L, 1);
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27 return 1;
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28 }
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29
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30 for(i = 0; i < a; i++) {
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31 luaL_addchar(&buf, str_a[i] & str_b[i % b]);
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32 }
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33
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34 luaL_pushresult(&buf);
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35 return 1;
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36 }
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37
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38 int strop_or(lua_State *L) {
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39 luaL_Buffer buf;
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40 size_t a, b, i;
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41 const char *str_a = luaL_checklstring(L, 1, &a);
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42 const char *str_b = luaL_checklstring(L, 2, &b);
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43
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44 luaL_buffinit(L, &buf);
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45
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46 if(a == 0 || b == 0) {
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47 lua_settop(L, 1);
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48 return 1;
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49 }
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50
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51 for(i = 0; i < a; i++) {
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52 luaL_addchar(&buf, str_a[i] | str_b[i % b]);
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53 }
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54
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55 luaL_pushresult(&buf);
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56 return 1;
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57 }
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58
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59 int strop_xor(lua_State *L) {
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60 luaL_Buffer buf;
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61 size_t a, b, i;
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62 const char *str_a = luaL_checklstring(L, 1, &a);
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63 const char *str_b = luaL_checklstring(L, 2, &b);
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64
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65 luaL_buffinit(L, &buf);
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66
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67 if(a == 0 || b == 0) {
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68 lua_settop(L, 1);
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69 return 1;
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70 }
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71
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72 for(i = 0; i < a; i++) {
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73 luaL_addchar(&buf, str_a[i] ^ str_b[i % b]);
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74 }
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75
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76 luaL_pushresult(&buf);
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77 return 1;
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78 }
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79
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80 LUA_API int luaopen_util_strbitop(lua_State *L) {
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81 luaL_Reg exports[] = {
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82 { "sand", strop_and },
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83 { "sor", strop_or },
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84 { "sxor", strop_xor },
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85 { NULL, NULL }
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86 };
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87
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88 lua_newtable(L);
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89 luaL_setfuncs(L, exports, 0);
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90 return 1;
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91 }