prosody
fb19a5c14d44
util-src/encodings.c

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util-src/encodings.c @ 432:fb19a5c14d44

Fix for hashes.c and encodings.c to rename luaopen for util_*
author Matthew Wild <mwild1@gmail.com>
date Wed, 26 Nov 2008 22:45:33 +0000
parent 417:d60e63379284
child 441:4089b62b510c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
415
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1 /*
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2 * encodings.c
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3 * Lua library for base64, stringprep and idna encodings
415
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4 */
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5
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6 #include <string.h>
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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 /***************** BASE64 *****************/
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12
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13 #define uint unsigned int
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14
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15 static const char code[]=
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16 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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17
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18 static void base64_encode(luaL_Buffer *b, uint c1, uint c2, uint c3, int n)
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19 {
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20 unsigned long tuple=c3+256UL*(c2+256UL*c1);
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21 int i;
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22 char s[4];
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23 for (i=0; i<4; i++) {
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24 s[3-i] = code[tuple % 64];
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25 tuple /= 64;
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26 }
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27 for (i=n+1; i<4; i++) s[i]='=';
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28 luaL_addlstring(b,s,4);
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29 }
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30
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31 static int Lbase64_encode(lua_State *L) /** encode(s) */
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32 {
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33 size_t l;
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34 const unsigned char *s=(const unsigned char*)luaL_checklstring(L,1,&l);
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35 luaL_Buffer b;
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36 int n;
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37 luaL_buffinit(L,&b);
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38 for (n=l/3; n--; s+=3) base64_encode(&b,s[0],s[1],s[2],3);
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39 switch (l%3)
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40 {
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41 case 1: base64_encode(&b,s[0],0,0,1); break;
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42 case 2: base64_encode(&b,s[0],s[1],0,2); break;
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43 }
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44 luaL_pushresult(&b);
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45 return 1;
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46 }
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47
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48 static void base64_decode(luaL_Buffer *b, int c1, int c2, int c3, int c4, int n)
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49 {
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50 unsigned long tuple=c4+64L*(c3+64L*(c2+64L*c1));
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51 char s[3];
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52 switch (--n)
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53 {
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54 case 3: s[2]=tuple;
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55 case 2: s[1]=tuple >> 8;
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56 case 1: s[0]=tuple >> 16;
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57 }
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58 luaL_addlstring(b,s,n);
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59 }
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60
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61 static int Lbase64_decode(lua_State *L) /** decode(s) */
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62 {
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63 size_t l;
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64 const char *s=luaL_checklstring(L,1,&l);
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65 luaL_Buffer b;
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66 int n=0;
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67 char t[4];
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68 luaL_buffinit(L,&b);
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69 for (;;)
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70 {
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71 int c=*s++;
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72 switch (c)
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73 {
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74 const char *p;
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75 default:
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76 p=strchr(code,c); if (p==NULL) return 0;
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77 t[n++]= p-code;
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78 if (n==4)
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79 {
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80 base64_decode(&b,t[0],t[1],t[2],t[3],4);
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81 n=0;
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82 }
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83 break;
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84 case '=':
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85 switch (n)
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86 {
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87 case 1: base64_decode(&b,t[0],0,0,0,1); break;
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88 case 2: base64_decode(&b,t[0],t[1],0,0,2); break;
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89 case 3: base64_decode(&b,t[0],t[1],t[2],0,3); break;
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90 }
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91 case 0:
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92 luaL_pushresult(&b);
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93 return 1;
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94 case '\n': case '\r': case '\t': case ' ': case '\f': case '\b':
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95 break;
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96 }
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97 }
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98 return 0;
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99 }
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100
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101 static const luaL_Reg Reg_base64[] =
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102 {
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103 { "encode", Lbase64_encode },
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104 { "decode", Lbase64_decode },
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105 { NULL, NULL }
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106 };
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107
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108 /***************** STRINGPREP *****************/
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109
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110 #include <stringprep.h>
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111
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112 static int stringprep_prep(lua_State *L, const Stringprep_profile *profile)
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113 {
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114 size_t len;
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115 const char *s = luaL_checklstring(L, 1, &len);
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116 char string[1024];
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117 int ret;
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118 if (len >= 1024) {
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119 lua_pushnil(L);
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120 return 1; // TODO return error message
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121 }
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122 strcpy(string, s);
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123 ret = stringprep(string, 1024, 0, profile);
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124 if (ret == STRINGPREP_OK) {
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125 lua_pushstring(L, string);
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126 return 1;
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127 } else {
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128 lua_pushnil(L);
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129 return 1; // TODO return error message
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130 }
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131 }
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132
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133 #define MAKE_PREP_FUNC(myFunc, prep) \
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134 static int myFunc(lua_State *L) { return stringprep_prep(L, prep); }
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135
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136 MAKE_PREP_FUNC(Lstringprep_nameprep, stringprep_nameprep) /** stringprep.nameprep(s) */
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137 MAKE_PREP_FUNC(Lstringprep_nodeprep, stringprep_xmpp_nodeprep) /** stringprep.nodeprep(s) */
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138 MAKE_PREP_FUNC(Lstringprep_resourceprep, stringprep_xmpp_resourceprep) /** stringprep.resourceprep(s) */
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139 MAKE_PREP_FUNC(Lstringprep_saslprep, stringprep_saslprep) /** stringprep.saslprep(s) */
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140
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141 static const luaL_Reg Reg_stringprep[] =
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142 {
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143 { "nameprep", Lstringprep_nameprep },
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144 { "nodeprep", Lstringprep_nodeprep },
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145 { "resourceprep", Lstringprep_resourceprep },
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146 { "saslprep", Lstringprep_saslprep },
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147 { NULL, NULL }
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148 };
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149
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150 /***************** IDNA *****************/
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151
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152 #include <idna.h>
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153
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154 static int Lidna_to_ascii(lua_State *L) /** idna.to_ascii(s) */
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155 {
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156 size_t len;
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157 const char *s = luaL_checklstring(L, 1, &len);
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158 char* output = NULL;
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159 int ret = idna_to_ascii_8z(s, &output, 0);
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160 if (ret == IDNA_SUCCESS) {
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161 lua_pushstring(L, output);
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162 if (output) free(output);
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163 return 1;
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164 } else {
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165 lua_pushnil(L);
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166 if (output) free(output);
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167 return 1; // TODO return error message
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168 }
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169 }
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170
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171 static int Lidna_to_unicode(lua_State *L) /** idna.to_unicode(s) */
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172 {
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173 size_t len;
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174 const char *s = luaL_checklstring(L, 1, &len);
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175 char* output = NULL;
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176 int ret = idna_to_unicode_8z8z(s, &output, 0);
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177 if (ret == IDNA_SUCCESS) {
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178 lua_pushstring(L, output);
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179 if (output) free(output);
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180 return 1;
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181 } else {
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182 lua_pushnil(L);
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183 if (output) free(output);
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184 return 1; // TODO return error message
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185 }
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186 }
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187
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188 static const luaL_Reg Reg_idna[] =
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189 {
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190 { "to_ascii", Lidna_to_ascii },
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191 { "to_unicode", Lidna_to_unicode },
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192 { NULL, NULL }
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193 };
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194
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195 /***************** end *****************/
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196
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197 static const luaL_Reg Reg[] =
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198 {
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199 { NULL, NULL }
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200 };
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201
432
fb19a5c14d44 Fix for hashes.c and encodings.c to rename luaopen for util_*
Matthew Wild <mwild1@gmail.com>
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202 LUALIB_API int luaopen_util_encodings(lua_State *L)
415
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203 {
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204 luaL_register(L, "encodings", Reg);
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205
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206 lua_pushliteral(L, "base64");
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207 lua_newtable(L);
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208 luaL_register(L, NULL, Reg_base64);
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209 lua_settable(L,-3);
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210
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211 lua_pushliteral(L, "stringprep");
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212 lua_newtable(L);
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213 luaL_register(L, NULL, Reg_stringprep);
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214 lua_settable(L,-3);
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215
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216 lua_pushliteral(L, "idna");
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217 lua_newtable(L);
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218 luaL_register(L, NULL, Reg_idna);
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219 lua_settable(L,-3);
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220
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221 lua_pushliteral(L, "version"); /** version */
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222 lua_pushliteral(L, "-3.14");
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223 lua_settable(L,-3);
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224 return 1;
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225 }