You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
288 lines
7.4 KiB
288 lines
7.4 KiB
/***************************************************************************
|
|
* _ _ ____ _
|
|
* Project ___| | | | _ \| |
|
|
* / __| | | | |_) | |
|
|
* | (__| |_| | _ <| |___
|
|
* \___|\___/|_| \_\_____|
|
|
*
|
|
* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
|
|
*
|
|
* This software is licensed as described in the file COPYING, which
|
|
* you should have received as part of this distribution. The terms
|
|
* are also available at https://curl.se/docs/copyright.html.
|
|
*
|
|
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
|
* copies of the Software, and permit persons to whom the Software is
|
|
* furnished to do so, under the terms of the COPYING file.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
* SPDX-License-Identifier: curl
|
|
*
|
|
***************************************************************************/
|
|
|
|
/*
|
|
* IDN conversions
|
|
*/
|
|
|
|
#include "curl_setup.h"
|
|
#include "urldata.h"
|
|
#include "idn.h"
|
|
#include "sendf.h"
|
|
#include "curl_multibyte.h"
|
|
#include "warnless.h"
|
|
|
|
#ifdef USE_LIBIDN2
|
|
#include <idn2.h>
|
|
|
|
#if defined(WIN32) && defined(UNICODE)
|
|
#define IDN2_LOOKUP(name, host, flags) \
|
|
idn2_lookup_u8((const uint8_t *)name, (uint8_t **)host, flags)
|
|
#else
|
|
#define IDN2_LOOKUP(name, host, flags) \
|
|
idn2_lookup_ul((const char *)name, (char **)host, flags)
|
|
#endif
|
|
#endif /* USE_LIBIDN2 */
|
|
|
|
/* The last 3 #include files should be in this order */
|
|
#include "curl_printf.h"
|
|
#include "curl_memory.h"
|
|
#include "memdebug.h"
|
|
|
|
#ifdef USE_WIN32_IDN
|
|
/* using Windows kernel32 and normaliz libraries. */
|
|
|
|
#if !defined(_WIN32_WINNT) || _WIN32_WINNT < 0x600
|
|
WINBASEAPI int WINAPI IdnToAscii(DWORD dwFlags,
|
|
const WCHAR *lpUnicodeCharStr,
|
|
int cchUnicodeChar,
|
|
WCHAR *lpASCIICharStr,
|
|
int cchASCIIChar);
|
|
WINBASEAPI int WINAPI IdnToUnicode(DWORD dwFlags,
|
|
const WCHAR *lpASCIICharStr,
|
|
int cchASCIIChar,
|
|
WCHAR *lpUnicodeCharStr,
|
|
int cchUnicodeChar);
|
|
#endif
|
|
|
|
#define IDN_MAX_LENGTH 255
|
|
|
|
static CURLcode win32_idn_to_ascii(const char *in, char **out)
|
|
{
|
|
wchar_t *in_w = curlx_convert_UTF8_to_wchar(in);
|
|
*out = NULL;
|
|
if(in_w) {
|
|
wchar_t punycode[IDN_MAX_LENGTH];
|
|
int chars = IdnToAscii(0, in_w, (int)(wcslen(in_w) + 1), punycode,
|
|
IDN_MAX_LENGTH);
|
|
curlx_unicodefree(in_w);
|
|
if(chars) {
|
|
char *mstr = curlx_convert_wchar_to_UTF8(punycode);
|
|
if(mstr) {
|
|
*out = strdup(mstr);
|
|
curlx_unicodefree(mstr);
|
|
if(!*out)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
}
|
|
else
|
|
return CURLE_OUT_OF_MEMORY;
|
|
}
|
|
else
|
|
return CURLE_URL_MALFORMAT;
|
|
}
|
|
else
|
|
return CURLE_URL_MALFORMAT;
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
static CURLcode win32_ascii_to_idn(const char *in, char **output)
|
|
{
|
|
char *out = NULL;
|
|
|
|
wchar_t *in_w = curlx_convert_UTF8_to_wchar(in);
|
|
if(in_w) {
|
|
WCHAR idn[IDN_MAX_LENGTH]; /* stores a UTF-16 string */
|
|
int chars = IdnToUnicode(0, in_w, (int)(wcslen(in_w) + 1), idn,
|
|
IDN_MAX_LENGTH);
|
|
if(chars) {
|
|
/* 'chars' is "the number of characters retrieved" */
|
|
char *mstr = curlx_convert_wchar_to_UTF8(idn);
|
|
if(mstr) {
|
|
out = strdup(mstr);
|
|
curlx_unicodefree(mstr);
|
|
if(!out)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
}
|
|
}
|
|
else
|
|
return CURLE_URL_MALFORMAT;
|
|
}
|
|
else
|
|
return CURLE_URL_MALFORMAT;
|
|
*output = out;
|
|
return CURLE_OK;
|
|
}
|
|
|
|
#endif /* USE_WIN32_IDN */
|
|
|
|
/*
|
|
* Helpers for IDNA conversions.
|
|
*/
|
|
bool Curl_is_ASCII_name(const char *hostname)
|
|
{
|
|
/* get an UNSIGNED local version of the pointer */
|
|
const unsigned char *ch = (const unsigned char *)hostname;
|
|
|
|
if(!hostname) /* bad input, consider it ASCII! */
|
|
return TRUE;
|
|
|
|
while(*ch) {
|
|
if(*ch++ & 0x80)
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
#ifdef USE_IDN
|
|
/*
|
|
* Curl_idn_decode() returns an allocated IDN decoded string if it was
|
|
* possible. NULL on error.
|
|
*
|
|
* CURLE_URL_MALFORMAT - the host name could not be converted
|
|
* CURLE_OUT_OF_MEMORY - memory problem
|
|
*
|
|
*/
|
|
static CURLcode idn_decode(const char *input, char **output)
|
|
{
|
|
char *decoded = NULL;
|
|
CURLcode result = CURLE_OK;
|
|
#ifdef USE_LIBIDN2
|
|
if(idn2_check_version(IDN2_VERSION)) {
|
|
int flags = IDN2_NFC_INPUT
|
|
#if IDN2_VERSION_NUMBER >= 0x00140000
|
|
/* IDN2_NFC_INPUT: Normalize input string using normalization form C.
|
|
IDN2_NONTRANSITIONAL: Perform Unicode TR46 non-transitional
|
|
processing. */
|
|
| IDN2_NONTRANSITIONAL
|
|
#endif
|
|
;
|
|
int rc = IDN2_LOOKUP(input, &decoded, flags);
|
|
if(rc != IDN2_OK)
|
|
/* fallback to TR46 Transitional mode for better IDNA2003
|
|
compatibility */
|
|
rc = IDN2_LOOKUP(input, &decoded, IDN2_TRANSITIONAL);
|
|
if(rc != IDN2_OK)
|
|
result = CURLE_URL_MALFORMAT;
|
|
}
|
|
else
|
|
/* a too old libidn2 version */
|
|
result = CURLE_NOT_BUILT_IN;
|
|
#elif defined(USE_WIN32_IDN)
|
|
result = win32_idn_to_ascii(input, &decoded);
|
|
#endif
|
|
if(!result)
|
|
*output = decoded;
|
|
return result;
|
|
}
|
|
|
|
static CURLcode idn_encode(const char *puny, char **output)
|
|
{
|
|
char *enc = NULL;
|
|
#ifdef USE_LIBIDN2
|
|
int rc = idn2_to_unicode_8z8z(puny, &enc, 0);
|
|
if(rc != IDNA_SUCCESS)
|
|
return rc == IDNA_MALLOC_ERROR ? CURLE_OUT_OF_MEMORY : CURLE_URL_MALFORMAT;
|
|
#elif defined(USE_WIN32_IDN)
|
|
CURLcode result = win32_ascii_to_idn(puny, &enc);
|
|
if(result)
|
|
return result;
|
|
#endif
|
|
*output = enc;
|
|
return CURLE_OK;
|
|
}
|
|
|
|
CURLcode Curl_idn_decode(const char *input, char **output)
|
|
{
|
|
char *d = NULL;
|
|
CURLcode result = idn_decode(input, &d);
|
|
#ifdef USE_LIBIDN2
|
|
if(!result) {
|
|
char *c = strdup(d);
|
|
idn2_free(d);
|
|
if(c)
|
|
d = c;
|
|
else
|
|
result = CURLE_OUT_OF_MEMORY;
|
|
}
|
|
#endif
|
|
if(!result)
|
|
*output = d;
|
|
return result;
|
|
}
|
|
|
|
CURLcode Curl_idn_encode(const char *puny, char **output)
|
|
{
|
|
char *d = NULL;
|
|
CURLcode result = idn_encode(puny, &d);
|
|
#ifdef USE_LIBIDN2
|
|
if(!result) {
|
|
char *c = strdup(d);
|
|
idn2_free(d);
|
|
if(c)
|
|
d = c;
|
|
else
|
|
result = CURLE_OUT_OF_MEMORY;
|
|
}
|
|
#endif
|
|
if(!result)
|
|
*output = d;
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Frees data allocated by idnconvert_hostname()
|
|
*/
|
|
void Curl_free_idnconverted_hostname(struct hostname *host)
|
|
{
|
|
if(host->encalloc) {
|
|
/* must be freed with idn2_free() if allocated by libidn */
|
|
Curl_idn_free(host->encalloc);
|
|
host->encalloc = NULL;
|
|
}
|
|
}
|
|
|
|
#endif /* USE_IDN */
|
|
|
|
/*
|
|
* Perform any necessary IDN conversion of hostname
|
|
*/
|
|
CURLcode Curl_idnconvert_hostname(struct hostname *host)
|
|
{
|
|
/* set the name we use to display the host name */
|
|
host->dispname = host->name;
|
|
|
|
#ifdef USE_IDN
|
|
/* Check name for non-ASCII and convert hostname if we can */
|
|
if(!Curl_is_ASCII_name(host->name)) {
|
|
char *decoded;
|
|
CURLcode result = idn_decode(host->name, &decoded);
|
|
if(!result) {
|
|
if(!*decoded) {
|
|
/* zero length is a bad host name */
|
|
Curl_idn_free(decoded);
|
|
return CURLE_URL_MALFORMAT;
|
|
}
|
|
/* successful */
|
|
host->encalloc = decoded;
|
|
/* change the name pointer to point to the encoded hostname */
|
|
host->name = host->encalloc;
|
|
}
|
|
else
|
|
return result;
|
|
}
|
|
#endif
|
|
return CURLE_OK;
|
|
}
|