/* Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
---
+-- Copyright (C) 1994-2015 Lua.org, PUC-Rio.
+--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
* Lua library for base64, stringprep and idna encodings
*/
-// Newer MSVC compilers deprecate strcpy as unsafe, but we use it in a safe way
+/* Newer MSVC compilers deprecate strcpy as unsafe, but we use it in a safe way */
#define _CRT_SECURE_NO_DEPRECATE
#include <string.h>
#include <stdlib.h>
-
#include "lua.h"
#include "lauxlib.h"
+#if (LUA_VERSION_NUM == 501)
+#define luaL_setfuncs(L, R, N) luaL_register(L, NULL, R)
+#endif
+
/***************** BASE64 *****************/
-static const char code[]=
-"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+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);
+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];
+
+ 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);
+
+ for(i = n + 1; i < 4; i++) {
+ s[i] = '=';
+ }
+
+ luaL_addlstring(b, s, 4);
}
-static int Lbase64_encode(lua_State *L) /** encode(s) */
-{
+static int Lbase64_encode(lua_State* L) { /** encode(s) */
size_t l;
- const unsigned char *s=(const unsigned char*)luaL_checklstring(L,1,&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_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));
+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);
+
+ 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);
+
+ luaL_addlstring(b, s, n);
}
-static int Lbase64_decode(lua_State *L) /** decode(s) */
-{
+static int Lbase64_decode(lua_State* L) { /** decode(s) */
size_t l;
- const char *s=luaL_checklstring(L,1,&l);
+ const char* s = luaL_checklstring(L, 1, &l);
luaL_Buffer b;
- int n=0;
+ int n = 0;
char t[4];
- luaL_buffinit(L,&b);
- for (;;)
- {
- int c=*s++;
- switch (c)
- {
- const char *p;
+ 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;
+ 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;
+
+ 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;
+
+ n = 0;
break;
case 0:
luaL_pushresult(&b);
return 1;
- case '\n': case '\r': case '\t': case ' ': case '\f': case '\b':
+ case '\n':
+ case '\r':
+ case '\t':
+ case ' ':
+ case '\f':
+ case '\b':
break;
}
}
}
-static const luaL_Reg Reg_base64[] =
-{
+static const luaL_Reg Reg_base64[] = {
{ "encode", Lbase64_encode },
{ "decode", Lbase64_decode },
{ NULL, NULL }
};
+/******************* UTF-8 ********************/
+
+/*
+ * Adapted from Lua 5.3
+ * Needed because libidn does not validate that input is valid UTF-8
+ */
+
+#define MAXUNICODE 0x10FFFF
+
+/*
+ * Decode one UTF-8 sequence, returning NULL if byte sequence is invalid.
+ */
+static const char* utf8_decode(const char* o, int* val) {
+ static unsigned int limits[] = {0xFF, 0x7F, 0x7FF, 0xFFFF};
+ const unsigned char* s = (const unsigned char*)o;
+ unsigned int c = s[0];
+ unsigned int res = 0; /* final result */
+
+ if(c < 0x80) { /* ascii? */
+ res = c;
+ } else {
+ int count = 0; /* to count number of continuation bytes */
+
+ while(c & 0x40) { /* still have continuation bytes? */
+ int cc = s[++count]; /* read next byte */
+
+ if((cc & 0xC0) != 0x80) { /* not a continuation byte? */
+ return NULL; /* invalid byte sequence */
+ }
+
+ res = (res << 6) | (cc & 0x3F); /* add lower 6 bits from cont. byte */
+ c <<= 1; /* to test next bit */
+ }
+
+ res |= ((c & 0x7F) << (count * 5)); /* add first byte */
+
+ if(count > 3 || res > MAXUNICODE || res <= limits[count] || (0xd800 <= res && res <= 0xdfff)) {
+ return NULL; /* invalid byte sequence */
+ }
+
+ s += count; /* skip continuation bytes read */
+ }
+
+ if(val) {
+ *val = res;
+ }
+
+ return (const char*)s + 1; /* +1 to include first byte */
+}
+
+/*
+ * Check that a string is valid UTF-8
+ * Returns NULL if not
+ */
+const char* check_utf8(lua_State* L, int idx, size_t* l) {
+ size_t pos, len;
+ const char* s = luaL_checklstring(L, 1, &len);
+ pos = 0;
+
+ while(pos <= len) {
+ const char* s1 = utf8_decode(s + pos, NULL);
+
+ if(s1 == NULL) { /* conversion error? */
+ return NULL;
+ }
+
+ pos = s1 - s;
+ }
+
+ if(l != NULL) {
+ *l = len;
+ }
+
+ return s;
+}
+
+static int Lutf8_valid(lua_State* L) {
+ lua_pushboolean(L, check_utf8(L, 1, NULL) != NULL);
+ return 1;
+}
+
+static int Lutf8_length(lua_State* L) {
+ size_t len;
+
+ if(!check_utf8(L, 1, &len)) {
+ lua_pushnil(L);
+ lua_pushliteral(L, "invalid utf8");
+ return 2;
+ }
+
+ lua_pushinteger(L, len);
+ return 1;
+}
+
+static const luaL_Reg Reg_utf8[] = {
+ { "valid", Lutf8_valid },
+ { "length", Lutf8_length },
+ { NULL, NULL }
+};
+
+
/***************** STRINGPREP *****************/
+#ifdef USE_STRINGPREP_ICU
+
+#include <unicode/usprep.h>
+#include <unicode/ustring.h>
+#include <unicode/utrace.h>
+
+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 <stringprep.h>
-static int stringprep_prep(lua_State *L, const Stringprep_profile *profile)
-{
+static int stringprep_prep(lua_State* L, const Stringprep_profile* profile) {
size_t len;
- const char *s;
+ 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) {
+
+ s = check_utf8(L, 1, &len);
+
+ if(s == NULL || len >= 1024 || len != strlen(s)) {
lua_pushnil(L);
- return 1; // TODO return error message
+ return 1; /* TODO return error message */
}
+
strcpy(string, s);
- ret = stringprep(string, 1024, 0, profile);
- if (ret == STRINGPREP_OK) {
+ 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
+ return 1; /* TODO return error message */
}
}
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[] =
-{
+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 <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 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 <idna.h>
#include <idn-free.h>
-static int Lidna_to_ascii(lua_State *L) /** idna.to_ascii(s) */
-{
+static int Lidna_to_ascii(lua_State* L) { /** idna.to_ascii(s) */
size_t len;
- const char *s = luaL_checklstring(L, 1, &len);
+ const char* s = check_utf8(L, 1, &len);
char* output = NULL;
- int ret = idna_to_ascii_8z(s, &output, IDNA_USE_STD3_ASCII_RULES);
- if (ret == IDNA_SUCCESS) {
+ int ret;
+
+ if(s == NULL || len != strlen(s)) {
+ lua_pushnil(L);
+ return 1; /* TODO return error message */
+ }
+
+ 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
+ return 1; /* TODO return error message */
}
}
-static int Lidna_to_unicode(lua_State *L) /** idna.to_unicode(s) */
-{
+static int Lidna_to_unicode(lua_State* L) { /** idna.to_unicode(s) */
size_t len;
- const char *s = luaL_checklstring(L, 1, &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) {
+
+ 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
+ return 1; /* TODO return error message */
}
}
+#endif
-static const luaL_Reg Reg_idna[] =
-{
+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
+ lua_newtable(L);
-LUALIB_API int luaopen_util_encodings(lua_State *L)
-{
- luaL_register(L, "encodings", Reg);
+ lua_newtable(L);
+ luaL_setfuncs(L, Reg_base64, 0);
+ lua_setfield(L, -2, "base64");
- lua_pushliteral(L, "base64");
lua_newtable(L);
- luaL_register(L, NULL, Reg_base64);
- lua_settable(L,-3);
+ luaL_setfuncs(L, Reg_stringprep, 0);
+ lua_setfield(L, -2, "stringprep");
- lua_pushliteral(L, "stringprep");
lua_newtable(L);
- luaL_register(L, NULL, Reg_stringprep);
- lua_settable(L,-3);
+ luaL_setfuncs(L, Reg_idna, 0);
+ lua_setfield(L, -2, "idna");
- lua_pushliteral(L, "idna");
lua_newtable(L);
- luaL_register(L, NULL, Reg_idna);
- lua_settable(L,-3);
+ luaL_setfuncs(L, Reg_utf8, 0);
+ lua_setfield(L, -2, "utf8");
- lua_pushliteral(L, "version"); /** version */
lua_pushliteral(L, "-3.14");
- lua_settable(L,-3);
+ lua_setfield(L, -2, "version");
return 1;
}
projects / prosody.git / blobdiff