--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/util-src/encodings.cpp Tue Dec 14 15:03:37 2010 +0100
@@ -0,0 +1,373 @@
+/* Prosody IM
+-- Copyright (C) 2008-2010 Matthew Wild
+-- Copyright (C) 2008-2010 Waqas Hussain
+--
+-- This project is MIT/X11 licensed. Please see the
+-- COPYING file in the source package for more information.
+--
+*/
+
+/*
+* encodings.c
+* Lua library for base64, stringprep and idna encodings
+*/
+
+// Newer MSVC compilers deprecate strcpy as unsafe, but we use it in a safe way
+#define _CRT_SECURE_NO_DEPRECATE
+
+extern "C" {
+#include <string.h>
+#include <stdlib.h>
+#include "lua.h"
+#include "lauxlib.h"
+}
+/***************** BASE64 *****************/
+
+#define LUALIB_API extern "C"
+
+static const char code[]=
+"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+static void base64_encode(luaL_Buffer *b, unsigned int c1, unsigned int c2, unsigned int c3, int n)
+{
+ unsigned long tuple=c3+256UL*(c2+256UL*c1);
+ int i;
+ char s[4];
+ for (i=0; i<4; i++) {
+ s[3-i] = code[tuple % 64];
+ tuple /= 64;
+ }
+ for (i=n+1; i<4; i++) s[i]='=';
+ luaL_addlstring(b,s,4);
+}
+
+static int Lbase64_encode(lua_State *L) /** encode(s) */
+{
+ size_t l;
+ const unsigned char *s=(const unsigned char*)luaL_checklstring(L,1,&l);
+ luaL_Buffer b;
+ int n;
+ luaL_buffinit(L,&b);
+ for (n=l/3; n--; s+=3) base64_encode(&b,s[0],s[1],s[2],3);
+ switch (l%3)
+ {
+ case 1: base64_encode(&b,s[0],0,0,1); break;
+ case 2: base64_encode(&b,s[0],s[1],0,2); break;
+ }
+ luaL_pushresult(&b);
+ return 1;
+}
+
+static void base64_decode(luaL_Buffer *b, int c1, int c2, int c3, int c4, int n)
+{
+ unsigned long tuple=c4+64L*(c3+64L*(c2+64L*c1));
+ char s[3];
+ switch (--n)
+ {
+ case 3: s[2]=(char) tuple;
+ case 2: s[1]=(char) (tuple >> 8);
+ case 1: s[0]=(char) (tuple >> 16);
+ }
+ luaL_addlstring(b,s,n);
+}
+
+static int Lbase64_decode(lua_State *L) /** decode(s) */
+{
+ size_t l;
+ const char *s=luaL_checklstring(L,1,&l);
+ luaL_Buffer b;
+ int n=0;
+ char t[4];
+ luaL_buffinit(L,&b);
+ for (;;)
+ {
+ int c=*s++;
+ switch (c)
+ {
+ const char *p;
+ default:
+ p=strchr(code,c); if (p==NULL) return 0;
+ t[n++]= (char) (p-code);
+ if (n==4)
+ {
+ base64_decode(&b,t[0],t[1],t[2],t[3],4);
+ n=0;
+ }
+ break;
+ case '=':
+ switch (n)
+ {
+ case 1: base64_decode(&b,t[0],0,0,0,1); break;
+ case 2: base64_decode(&b,t[0],t[1],0,0,2); break;
+ case 3: base64_decode(&b,t[0],t[1],t[2],0,3); break;
+ }
+ n=0;
+ break;
+ case 0:
+ luaL_pushresult(&b);
+ return 1;
+ case '\n': case '\r': case '\t': case ' ': case '\f': case '\b':
+ break;
+ }
+ }
+}
+
+static const luaL_Reg Reg_base64[] =
+{
+ { "encode", Lbase64_encode },
+ { "decode", Lbase64_decode },
+ { NULL, NULL }
+};
+
+/***************** STRINGPREP *****************/
+#ifndef USE_STRINGPREP_ICU
+/****************** libidn ********************/
+#include <stringprep.h>
+
+static int stringprep_prep(lua_State *L, const Stringprep_profile *profile)
+{
+ size_t len;
+ const char *s;
+ char string[1024];
+ int ret;
+ if(!lua_isstring(L, 1)) {
+ lua_pushnil(L);
+ return 1;
+ }
+ s = lua_tolstring(L, 1, &len);
+ if (len >= 1024) {
+ lua_pushnil(L);
+ return 1; // TODO return error message
+ }
+ strcpy(string, s);
+ ret = stringprep(string, 1024, 0, profile);
+ if (ret == STRINGPREP_OK) {
+ lua_pushstring(L, string);
+ return 1;
+ } else {
+ lua_pushnil(L);
+ return 1; // TODO return error message
+ }
+}
+
+#define MAKE_PREP_FUNC(myFunc, prep) \
+static int myFunc(lua_State *L) { return stringprep_prep(L, prep); }
+
+MAKE_PREP_FUNC(Lstringprep_nameprep, stringprep_nameprep) /** stringprep.nameprep(s) */
+MAKE_PREP_FUNC(Lstringprep_nodeprep, stringprep_xmpp_nodeprep) /** stringprep.nodeprep(s) */
+MAKE_PREP_FUNC(Lstringprep_resourceprep, stringprep_xmpp_resourceprep) /** stringprep.resourceprep(s) */
+MAKE_PREP_FUNC(Lstringprep_saslprep, stringprep_saslprep) /** stringprep.saslprep(s) */
+
+static const luaL_Reg Reg_stringprep[] =
+{
+ { "nameprep", Lstringprep_nameprep },
+ { "nodeprep", Lstringprep_nodeprep },
+ { "resourceprep", Lstringprep_resourceprep },
+ { "saslprep", Lstringprep_saslprep },
+ { NULL, NULL }
+};
+
+#else
+#include <unicode/usprep.h>
+//#include <unicode/stringpiece.h>
+#include <unicode/unistr.h>
+#include <unicode/utrace.h>
+
+static int icu_stringprep_prep(lua_State *L, const UStringPrepProfile *profile)
+{
+ size_t len;
+ const char *s;
+ UnicodeString ustr;
+ UErrorCode err = U_ZERO_ERROR;
+ UChar dest[1024];
+ char output[1024];
+ if(!lua_isstring(L, 1)) {
+ lua_pushnil(L);
+ return 1;
+ }
+ s = lua_tolstring(L, 1, &len);
+ if (len >= 1024) {
+ lua_pushnil(L);
+ return 1; // TODO return error message
+ }
+ ustr = UnicodeString::fromUTF8(s);
+ len = usprep_prepare(profile, ustr.getBuffer(), ustr.length(), dest, 1024, 0, NULL, &err);
+ if (U_FAILURE(err)) {
+ lua_pushnil(L);
+ return 1;
+ } else {
+ CheckedArrayByteSink output_sink(output, 1024);
+ UnicodeString dest_str(TRUE, dest, len);
+ dest_str.toUTF8(output_sink);
+ lua_pushstring(L, output);
+ return 1;
+ }
+}
+
+UStringPrepProfile *icu_nameprep;
+UStringPrepProfile *icu_nodeprep;
+UStringPrepProfile *icu_resourceprep;
+UStringPrepProfile *icu_saslprep;
+
+/* initialize global ICU stringprep profiles */
+void init_icu()
+{
+ UErrorCode err = U_ZERO_ERROR;
+ utrace_setLevel(UTRACE_VERBOSE);
+ icu_nameprep = usprep_openByType(USPREP_RFC3491_NAMEPREP, &err);
+ icu_nodeprep = usprep_openByType(USPREP_RFC3920_NODEPREP, &err);
+ icu_resourceprep = usprep_openByType(USPREP_RFC3920_RESOURCEPREP, &err);
+ icu_saslprep = usprep_openByType(USPREP_RFC4013_SASLPREP, &err);
+ if (U_FAILURE(err)) fprintf(stderr, "[c] util.encodings: error: %s\n", u_errorName((UErrorCode)err));
+}
+
+#define MAKE_PREP_FUNC(myFunc, prep) \
+static int myFunc(lua_State *L) { return icu_stringprep_prep(L, prep); }
+
+MAKE_PREP_FUNC(Lstringprep_nameprep, icu_nameprep) /** stringprep.nameprep(s) */
+MAKE_PREP_FUNC(Lstringprep_nodeprep, icu_nodeprep) /** stringprep.nodeprep(s) */
+MAKE_PREP_FUNC(Lstringprep_resourceprep, icu_resourceprep) /** stringprep.resourceprep(s) */
+MAKE_PREP_FUNC(Lstringprep_saslprep, icu_saslprep) /** stringprep.saslprep(s) */
+
+static const luaL_Reg Reg_stringprep[] =
+{
+ { "nameprep", Lstringprep_nameprep },
+ { "nodeprep", Lstringprep_nodeprep },
+ { "resourceprep", Lstringprep_resourceprep },
+ { "saslprep", Lstringprep_saslprep },
+ { NULL, NULL }
+};
+#endif
+
+/***************** IDNA *****************/
+#ifndef USE_STRINGPREP_ICU
+/****************** libidn ********************/
+#include <idna.h>
+#include <idn-free.h>
+static int Lidna_to_ascii(lua_State *L) /** idna.to_ascii(s) */
+{
+ size_t len;
+ const char *s = luaL_checklstring(L, 1, &len);
+ char* output = NULL;
+ int ret = idna_to_ascii_8z(s, &output, IDNA_USE_STD3_ASCII_RULES);
+ if (ret == IDNA_SUCCESS) {
+ lua_pushstring(L, output);
+ idn_free(output);
+ return 1;
+ } else {
+ lua_pushnil(L);
+ idn_free(output);
+ return 1; // TODO return error message
+ }
+}
+
+static int Lidna_to_unicode(lua_State *L) /** idna.to_unicode(s) */
+{
+ size_t len;
+ const char *s = luaL_checklstring(L, 1, &len);
+ char* output = NULL;
+ int ret = idna_to_unicode_8z8z(s, &output, 0);
+ if (ret == IDNA_SUCCESS) {
+ lua_pushstring(L, output);
+ idn_free(output);
+ return 1;
+ } else {
+ lua_pushnil(L);
+ idn_free(output);
+ return 1; // TODO return error message
+ }
+}
+#else
+#include <unicode/ustdio.h>
+#include <unicode/uidna.h>
+/* IDNA2003 or IDNA2008 ? ? ? */
+static int Lidna_to_ascii(lua_State *L) /** idna.to_ascii(s) */
+{
+ size_t len;
+ int32_t out_len;
+ const char *s = luaL_checklstring(L, 1, &len);
+ UnicodeString ustr;
+ UErrorCode err = U_ZERO_ERROR;
+ UChar dest[1024];
+ char output[1024];
+
+ ustr = UnicodeString::fromUTF8(s);
+ out_len = uidna_IDNToASCII(ustr.getBuffer(), ustr.length(), dest, 1024, UIDNA_USE_STD3_RULES, NULL, &err);
+ if (U_FAILURE(err)) {
+ lua_pushnil(L);
+ return 1;
+ } else {
+ CheckedArrayByteSink output_sink(output, 1024);
+ UnicodeString dest_str(TRUE, dest, out_len);
+ dest_str.toUTF8(output_sink);
+ lua_pushstring(L, output);
+ return 1;
+ }
+}
+
+static int Lidna_to_unicode(lua_State *L) /** idna.to_unicode(s) */
+{
+ size_t len;
+ int32_t out_len;
+ const char *s = luaL_checklstring(L, 1, &len);
+ UnicodeString ustr;
+ UErrorCode err = U_ZERO_ERROR;
+ UChar dest[1024];
+ char output[1024];
+
+ ustr = UnicodeString::fromUTF8(s);
+ out_len = uidna_IDNToUnicode(ustr.getBuffer(), ustr.length(), dest, 1024, UIDNA_USE_STD3_RULES, NULL, &err);
+ if (U_FAILURE(err)) {
+ lua_pushnil(L);
+ return 1;
+ } else {
+ CheckedArrayByteSink output_sink(output, 1024);
+ UnicodeString dest_str(TRUE, dest, out_len);
+ dest_str.toUTF8(output_sink);
+ lua_pushstring(L, output);
+ return 1;
+ }
+}
+#endif
+
+static const luaL_Reg Reg_idna[] =
+{
+ { "to_ascii", Lidna_to_ascii },
+ { "to_unicode", Lidna_to_unicode },
+ { NULL, NULL }
+};
+
+/***************** end *****************/
+
+static const luaL_Reg Reg[] =
+{
+ { NULL, NULL }
+};
+
+LUALIB_API int luaopen_util_encodings(lua_State *L)
+{
+#ifdef USE_STRINGPREP_ICU
+ init_icu();
+#endif
+ luaL_register(L, "encodings", Reg);
+
+ lua_pushliteral(L, "base64");
+ lua_newtable(L);
+ luaL_register(L, NULL, Reg_base64);
+ lua_settable(L,-3);
+
+ lua_pushliteral(L, "stringprep");
+ lua_newtable(L);
+ luaL_register(L, NULL, Reg_stringprep);
+ lua_settable(L,-3);
+
+ lua_pushliteral(L, "idna");
+ lua_newtable(L);
+ luaL_register(L, NULL, Reg_idna);
+ lua_settable(L,-3);
+
+ lua_pushliteral(L, "version"); /** version */
+ lua_pushliteral(L, "-3.14");
+ lua_settable(L,-3);
+ return 1;
+}