X-Git-Url: https://git.enpas.org/?a=blobdiff_plain;f=util-src%2Fencodings.c;h=b9b6160a03809c2eb7b1c04a2622f0a90814592b;hb=b85f75e110d99b890fc22186cb2ad4d0c8f1d0a5;hp=f99d3faff067163226e98ea144fd31948aeeded1;hpb=35961d47f3d654e251a6f69e5527c828a53c9a13;p=prosody.git diff --git a/util-src/encodings.c b/util-src/encodings.c index f99d3faf..b9b6160a 100644 --- a/util-src/encodings.c +++ b/util-src/encodings.c @@ -1,237 +1,395 @@ -/* -* xxpath.c -* An implementation of a subset of xpath for Lua 5.1 -* Waqas Hussain -* 05 Oct 2008 15:28:15 -*/ - -#include - -#include "lua.h" -#include "lauxlib.h" - -/*const char* hex_tab = "0123456789abcdef"; -void toHex(const char* in, int length, char* out) { - int i; - for (i = 0; i < length; i++) { - out[i*2] = hex_tab[(in[i] >> 4) & 0xF]; - out[i*2+1] = hex_tab[(in[i]) & 0xF]; - } - //out[i*2] = 0; -}*/ - -/***************** BASE64 *****************/ - -#define uint unsigned int - -static const char code[]= -"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; - -static void base64_encode(luaL_Buffer *b, uint c1, uint c2, uint 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]=tuple; - case 2: s[1]=tuple >> 8; - case 1: s[0]=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++]= 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; - } - case 0: - luaL_pushresult(&b); - return 1; - case '\n': case '\r': case '\t': case ' ': case '\f': case '\b': - break; - } - } - return 0; -} - -static const luaL_Reg Reg_base64[] = -{ - { "encode", Lbase64_encode }, - { "decode", Lbase64_decode }, - { NULL, NULL } -}; - -/***************** STRINGPREP *****************/ - -#include - -static int stringprep_prep(lua_State *L, const Stringprep_profile *profile) -{ - size_t len; - const char *s = luaL_checklstring(L, 1, &len); - char string[1024]; - int ret; - 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 } -}; - -/***************** IDNA *****************/ - -#include - -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, 0); - if (ret == IDNA_SUCCESS) { - lua_pushstring(L, output); - if (output) free(output); - return 1; - } else { - lua_pushnil(L); - if (output) 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); - if (output) free(output); - return 1; - } else { - lua_pushnil(L); - if (output) free(output); - return 1; // TODO return error message - } -} - -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_encodings(lua_State *L) -{ - 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; -} +/* 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 + +#include +#include +#include "lua.h" +#include "lauxlib.h" + +/***************** BASE64 *****************/ + +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 *****************/ +#ifdef USE_STRINGPREP_ICU + +#include +#include +#include + +static int icu_stringprep_prep(lua_State *L, const UStringPrepProfile *profile) +{ + size_t input_len; + int32_t unprepped_len, prepped_len, output_len; + const char *input; + char output[1024]; + + UChar unprepped[1024]; /* Temporary unicode buffer (1024 characters) */ + UChar prepped[1024]; + + UErrorCode err = U_ZERO_ERROR; + + if(!lua_isstring(L, 1)) { + lua_pushnil(L); + return 1; + } + input = lua_tolstring(L, 1, &input_len); + if (input_len >= 1024) { + lua_pushnil(L); + return 1; + } + u_strFromUTF8(unprepped, 1024, &unprepped_len, input, input_len, &err); + if (U_FAILURE(err)) { + lua_pushnil(L); + return 1; + } + prepped_len = usprep_prepare(profile, unprepped, unprepped_len, prepped, 1024, 0, NULL, &err); + if (U_FAILURE(err)) { + lua_pushnil(L); + return 1; + } else { + u_strToUTF8(output, 1024, &output_len, prepped, prepped_len, &err); + if (U_SUCCESS(err) && output_len < 1024) + lua_pushlstring(L, output, output_len); + else + lua_pushnil(L); + 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 } +}; +#else /* USE_STRINGPREP_ICU */ + +/****************** libidn ********************/ + +#include + +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, (Stringprep_profile_flags)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 } +}; +#endif + +/***************** IDNA *****************/ +#ifdef USE_STRINGPREP_ICU +#include +#include +/* IDNA2003 or IDNA2008 ? ? ? */ +static int Lidna_to_ascii(lua_State *L) /** idna.to_ascii(s) */ +{ + size_t len; + int32_t ulen, dest_len, output_len; + const char *s = luaL_checklstring(L, 1, &len); + UChar ustr[1024]; + UErrorCode err = U_ZERO_ERROR; + UChar dest[1024]; + char output[1024]; + + u_strFromUTF8(ustr, 1024, &ulen, s, len, &err); + if (U_FAILURE(err)) { + lua_pushnil(L); + return 1; + } + + dest_len = uidna_IDNToASCII(ustr, ulen, dest, 1024, UIDNA_USE_STD3_RULES, NULL, &err); + if (U_FAILURE(err)) { + lua_pushnil(L); + return 1; + } else { + u_strToUTF8(output, 1024, &output_len, dest, dest_len, &err); + if (U_SUCCESS(err) && output_len < 1024) + lua_pushlstring(L, output, output_len); + else + lua_pushnil(L); + return 1; + } +} + +static int Lidna_to_unicode(lua_State *L) /** idna.to_unicode(s) */ +{ + size_t len; + int32_t ulen, dest_len, output_len; + const char *s = luaL_checklstring(L, 1, &len); + UChar ustr[1024]; + UErrorCode err = U_ZERO_ERROR; + UChar dest[1024]; + char output[1024]; + + u_strFromUTF8(ustr, 1024, &ulen, s, len, &err); + if (U_FAILURE(err)) { + lua_pushnil(L); + return 1; + } + + dest_len = uidna_IDNToUnicode(ustr, ulen, dest, 1024, UIDNA_USE_STD3_RULES, NULL, &err); + if (U_FAILURE(err)) { + lua_pushnil(L); + return 1; + } else { + u_strToUTF8(output, 1024, &output_len, dest, dest_len, &err); + if (U_SUCCESS(err) && output_len < 1024) + lua_pushlstring(L, output, output_len); + else + lua_pushnil(L); + return 1; + } +} + +#else /* USE_STRINGPREP_ICU */ +/****************** libidn ********************/ + +#include +#include + +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 */ + } +} +#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; +}