/src/curl/lib/idn.c

Source
/***************************************************************************
 *                                  _   _ ____  _
 *  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"

#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 */

/* for macOS and iOS targets */
#ifdef USE_APPLE_IDN
#include <unicode/uidna.h>
#include <iconv.h>
#include <langinfo.h>

#define MAX_HOST_LENGTH 512

static CURLcode iconv_to_utf8(const char *in, size_t inlen,
                              char **out, size_t *outlen)
{
  iconv_t cd = iconv_open("UTF-8", nl_langinfo(CODESET));
  if(cd != (iconv_t)-1) {
    size_t iconv_outlen = *outlen;
    char *iconv_in = (char *)CURL_UNCONST(in);
    size_t iconv_inlen = inlen;
    size_t iconv_result = iconv(cd, &iconv_in, &iconv_inlen,
                                out, &iconv_outlen);
    *outlen -= iconv_outlen;
    iconv_close(cd);
    if(iconv_result == (size_t)-1) {
      /* !checksrc! disable ERRNOVAR 1 */
      if(errno == ENOMEM)
        return CURLE_OUT_OF_MEMORY;
      else
        return CURLE_URL_MALFORMAT;
    }

    return CURLE_OK;
  }
  else {
    /* !checksrc! disable ERRNOVAR 1 */
    if(errno == ENOMEM)
      return CURLE_OUT_OF_MEMORY;
    else
      return CURLE_FAILED_INIT;
  }
}

static CURLcode mac_idn_to_ascii(const char *in, char **out)
{
  size_t inlen = strlen(in);
  if(inlen < MAX_HOST_LENGTH) {
    char iconv_buffer[MAX_HOST_LENGTH] = { 0 };
    char *iconv_outptr = iconv_buffer;
    size_t iconv_outlen = sizeof(iconv_buffer);
    CURLcode iconv_result = iconv_to_utf8(in, inlen,
                                          &iconv_outptr, &iconv_outlen);
    if(!iconv_result) {
      UErrorCode err = U_ZERO_ERROR;
      UIDNA *idna = uidna_openUTS46(
        UIDNA_CHECK_BIDI | UIDNA_NONTRANSITIONAL_TO_ASCII, &err);
      if(!U_FAILURE(err)) {
        UIDNAInfo info = UIDNA_INFO_INITIALIZER;
        char buffer[MAX_HOST_LENGTH] = { 0 };
        (void)uidna_nameToASCII_UTF8(idna, iconv_buffer, (int)iconv_outlen,
                                     buffer, sizeof(buffer) - 1, &info, &err);
        uidna_close(idna);
        if(!U_FAILURE(err) && !info.errors) {
          *out = curlx_strdup(buffer);
          if(*out)
            return CURLE_OK;
          else
            return CURLE_OUT_OF_MEMORY;
        }
      }
    }
    else
      return iconv_result;
  }
  return CURLE_URL_MALFORMAT;
}

static CURLcode mac_ascii_to_idn(const char *in, char **out)
{
  size_t inlen = strlen(in);
  if(inlen < MAX_HOST_LENGTH) {
    UErrorCode err = U_ZERO_ERROR;
    UIDNA *idna = uidna_openUTS46(
      UIDNA_CHECK_BIDI | UIDNA_NONTRANSITIONAL_TO_UNICODE, &err);
    if(!U_FAILURE(err)) {
      UIDNAInfo info = UIDNA_INFO_INITIALIZER;
      char buffer[MAX_HOST_LENGTH] = { 0 };
      (void)uidna_nameToUnicodeUTF8(idna, in, -1, buffer,
                                    sizeof(buffer) - 1, &info, &err);
      uidna_close(idna);
      if(!U_FAILURE(err)) {
        *out = curlx_strdup(buffer);
        if(*out)
          return CURLE_OK;
        else
          return CURLE_OUT_OF_MEMORY;
      }
    }
  }
  return CURLE_URL_MALFORMAT;
}
#endif

#ifdef USE_WIN32_IDN
/* using Windows kernel32 and normaliz libraries. */

#if (!defined(_WIN32_WINNT) || _WIN32_WINNT < _WIN32_WINNT_VISTA) && \
  (!defined(WINVER) || WINVER < 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 char *idn_curlx_convert_wchar_to_UTF8(const wchar_t *str_w, int chars)
{
  char *str_utf8 = NULL;
  int bytes = WideCharToMultiByte(CP_UTF8, 0, str_w, chars, NULL, 0,
                                  NULL, NULL);
  if(bytes > 0) {
    str_utf8 = curlx_malloc(bytes);
    if(str_utf8) {
      if(WideCharToMultiByte(CP_UTF8, 0, str_w, chars, str_utf8, bytes,
                             NULL, NULL) == 0) {
        curlx_free(str_utf8);
        return NULL;
      }
    }
  }
  return str_utf8;
}

static CURLcode win32_idn_to_ascii(const char *in, char **out)
{
  wchar_t in_w[IDN_MAX_LENGTH];
  int in_w_len;
  *out = NULL;
  /* Returned in_w_len includes the null-terminator, which then gets
     preserved across the calls that follow, ending up terminating
     the buffer returned to the caller. */
  in_w_len = MultiByteToWideChar(CP_UTF8, 0, in, -1, in_w, IDN_MAX_LENGTH);
  if(in_w_len) {
    wchar_t punycode[IDN_MAX_LENGTH];
    int chars = IdnToAscii(0, in_w, in_w_len, punycode, IDN_MAX_LENGTH);
    if(chars > 0) {
      *out = idn_curlx_convert_wchar_to_UTF8(punycode, chars);
      if(!*out)
        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 **out)
{
  wchar_t in_w[IDN_MAX_LENGTH];
  int in_w_len;
  *out = NULL;
  /* Returned in_w_len includes the null-terminator, which then gets
     preserved across the calls that follow, ending up terminating
     the buffer returned to the caller. */
  in_w_len = MultiByteToWideChar(CP_UTF8, 0, in, -1, in_w, IDN_MAX_LENGTH);
  if(in_w_len) {
    WCHAR idn[IDN_MAX_LENGTH]; /* stores a UTF-16 string */
    int chars = IdnToUnicode(0, in_w, in_w_len, idn, IDN_MAX_LENGTH);
    if(chars > 0) {  /* 'chars' is "the number of characters retrieved" */
      *out = idn_curlx_convert_wchar_to_UTF8(idn, chars);
      if(!*out)
        return CURLE_OUT_OF_MEMORY;
    }
    else
      return CURLE_URL_MALFORMAT;
  }
  else
    return CURLE_URL_MALFORMAT;

  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 hostname 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);
#elif defined(USE_APPLE_IDN)
  result = mac_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;
#elif defined(USE_APPLE_IDN)
  CURLcode result = mac_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 = curlx_strdup(d);
    idn2_free(d);
    if(c)
      d = c;
    else
      result = CURLE_OUT_OF_MEMORY;
  }
#endif
  if(!result) {
    if(!d[0]) { /* ended up zero length, not acceptable */
      result = CURLE_URL_MALFORMAT;
      curlx_free(d);
    }
    else
      *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 = curlx_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)
{
  Curl_safefree(host->encalloc);
}

#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 hostname */
  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 = Curl_idn_decode(host->name, &decoded);
    if(result)
      return result;
    /* successful */
    host->name = host->encalloc = decoded;
  }
#endif
  return CURLE_OK;
}

Coverage Report

Created: 2026-01-10 07:08

Line	Count	Source
1		/***************************************************************************
2		* _ _ ____ _
3		* Project ___\| \| \| \| _ \\| \|
4		* / __\| \| \| \| \|_) \| \|
5		* \| (__\| \|_\| \| _ <\| \|___
6		* \___\|\___/\|_\| \_\_____\|
7		*
8		* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
9		*
10		* This software is licensed as described in the file COPYING, which
11		* you should have received as part of this distribution. The terms
12		* are also available at https://curl.se/docs/copyright.html.
13		*
14		* You may opt to use, copy, modify, merge, publish, distribute and/or sell
15		* copies of the Software, and permit persons to whom the Software is
16		* furnished to do so, under the terms of the COPYING file.
17		*
18		* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19		* KIND, either express or implied.
20		*
21		* SPDX-License-Identifier: curl
22		*
23		***************************************************************************/
24		/*
25		* IDN conversions
26		*/
27		#include "curl_setup.h"
28
29		#include "urldata.h"
30		#include "idn.h"
31
32		#ifdef USE_LIBIDN2
33		#include <idn2.h>
34
35		#if defined(_WIN32) && defined(UNICODE)
36		#define IDN2_LOOKUP(name, host, flags) \
37		idn2_lookup_u8((const uint8_t )name, (uint8_t *)host, flags)
38		#else
39		#define IDN2_LOOKUP(name, host, flags) \
40	3.73k	idn2_lookup_ul((const char )name, (char *)host, flags)
41		#endif
42		#endif /* USE_LIBIDN2 */
43
44		/* for macOS and iOS targets */
45		#ifdef USE_APPLE_IDN
46		#include <unicode/uidna.h>
47		#include <iconv.h>
48		#include <langinfo.h>
49
50		#define MAX_HOST_LENGTH 512
51
52		static CURLcode iconv_to_utf8(const char *in, size_t inlen,
53		char *out, size_t outlen)
54		{
55		iconv_t cd = iconv_open("UTF-8", nl_langinfo(CODESET));
56		if(cd != (iconv_t)-1) {
57		size_t iconv_outlen = *outlen;
58		char iconv_in = (char )CURL_UNCONST(in);
59		size_t iconv_inlen = inlen;
60		size_t iconv_result = iconv(cd, &iconv_in, &iconv_inlen,
61		out, &iconv_outlen);
62		*outlen -= iconv_outlen;
63		iconv_close(cd);
64		if(iconv_result == (size_t)-1) {
65		/* !checksrc! disable ERRNOVAR 1 */
66		if(errno == ENOMEM)
67		return CURLE_OUT_OF_MEMORY;
68		else
69		return CURLE_URL_MALFORMAT;
70		}
71
72		return CURLE_OK;
73		}
74		else {
75		/* !checksrc! disable ERRNOVAR 1 */
76		if(errno == ENOMEM)
77		return CURLE_OUT_OF_MEMORY;
78		else
79		return CURLE_FAILED_INIT;
80		}
81		}
82
83		static CURLcode mac_idn_to_ascii(const char in, char *out)
84		{
85		size_t inlen = strlen(in);
86		if(inlen < MAX_HOST_LENGTH) {
87		char iconv_buffer[MAX_HOST_LENGTH] = { 0 };
88		char *iconv_outptr = iconv_buffer;
89		size_t iconv_outlen = sizeof(iconv_buffer);
90		CURLcode iconv_result = iconv_to_utf8(in, inlen,
91		&iconv_outptr, &iconv_outlen);
92		if(!iconv_result) {
93		UErrorCode err = U_ZERO_ERROR;
94		UIDNA *idna = uidna_openUTS46(
95		UIDNA_CHECK_BIDI \| UIDNA_NONTRANSITIONAL_TO_ASCII, &err);
96		if(!U_FAILURE(err)) {
97		UIDNAInfo info = UIDNA_INFO_INITIALIZER;
98		char buffer[MAX_HOST_LENGTH] = { 0 };
99		(void)uidna_nameToASCII_UTF8(idna, iconv_buffer, (int)iconv_outlen,
100		buffer, sizeof(buffer) - 1, &info, &err);
101		uidna_close(idna);
102		if(!U_FAILURE(err) && !info.errors) {
103		*out = curlx_strdup(buffer);
104		if(*out)
105		return CURLE_OK;
106		else
107		return CURLE_OUT_OF_MEMORY;
108		}
109		}
110		}
111		else
112		return iconv_result;
113		}
114		return CURLE_URL_MALFORMAT;
115		}
116
117		static CURLcode mac_ascii_to_idn(const char in, char *out)
118		{
119		size_t inlen = strlen(in);
120		if(inlen < MAX_HOST_LENGTH) {
121		UErrorCode err = U_ZERO_ERROR;
122		UIDNA *idna = uidna_openUTS46(
123		UIDNA_CHECK_BIDI \| UIDNA_NONTRANSITIONAL_TO_UNICODE, &err);
124		if(!U_FAILURE(err)) {
125		UIDNAInfo info = UIDNA_INFO_INITIALIZER;
126		char buffer[MAX_HOST_LENGTH] = { 0 };
127		(void)uidna_nameToUnicodeUTF8(idna, in, -1, buffer,
128		sizeof(buffer) - 1, &info, &err);
129		uidna_close(idna);
130		if(!U_FAILURE(err)) {
131		*out = curlx_strdup(buffer);
132		if(*out)
133		return CURLE_OK;
134		else
135		return CURLE_OUT_OF_MEMORY;
136		}
137		}
138		}
139		return CURLE_URL_MALFORMAT;
140		}
141		#endif
142
143		#ifdef USE_WIN32_IDN
144		/* using Windows kernel32 and normaliz libraries. */
145
146		#if (!defined(_WIN32_WINNT) \|\| _WIN32_WINNT < _WIN32_WINNT_VISTA) && \
147		(!defined(WINVER) \|\| WINVER < 0x600)
148		WINBASEAPI int WINAPI IdnToAscii(DWORD dwFlags,
149		const WCHAR *lpUnicodeCharStr,
150		int cchUnicodeChar,
151		WCHAR *lpASCIICharStr,
152		int cchASCIIChar);
153		WINBASEAPI int WINAPI IdnToUnicode(DWORD dwFlags,
154		const WCHAR *lpASCIICharStr,
155		int cchASCIIChar,
156		WCHAR *lpUnicodeCharStr,
157		int cchUnicodeChar);
158		#endif
159
160		#define IDN_MAX_LENGTH 255
161
162		static char idn_curlx_convert_wchar_to_UTF8(const wchar_t str_w, int chars)
163		{
164		char *str_utf8 = NULL;
165		int bytes = WideCharToMultiByte(CP_UTF8, 0, str_w, chars, NULL, 0,
166		NULL, NULL);
167		if(bytes > 0) {
168		str_utf8 = curlx_malloc(bytes);
169		if(str_utf8) {
170		if(WideCharToMultiByte(CP_UTF8, 0, str_w, chars, str_utf8, bytes,
171		NULL, NULL) == 0) {
172		curlx_free(str_utf8);
173		return NULL;
174		}
175		}
176		}
177		return str_utf8;
178		}
179
180		static CURLcode win32_idn_to_ascii(const char in, char *out)
181		{
182		wchar_t in_w[IDN_MAX_LENGTH];
183		int in_w_len;
184		*out = NULL;
185		/* Returned in_w_len includes the null-terminator, which then gets
186		preserved across the calls that follow, ending up terminating
187		the buffer returned to the caller. */
188		in_w_len = MultiByteToWideChar(CP_UTF8, 0, in, -1, in_w, IDN_MAX_LENGTH);
189		if(in_w_len) {
190		wchar_t punycode[IDN_MAX_LENGTH];
191		int chars = IdnToAscii(0, in_w, in_w_len, punycode, IDN_MAX_LENGTH);
192		if(chars > 0) {
193		*out = idn_curlx_convert_wchar_to_UTF8(punycode, chars);
194		if(!*out)
195		return CURLE_OUT_OF_MEMORY;
196		}
197		else
198		return CURLE_URL_MALFORMAT;
199		}
200		else
201		return CURLE_URL_MALFORMAT;
202
203		return CURLE_OK;
204		}
205
206		static CURLcode win32_ascii_to_idn(const char in, char *out)
207		{
208		wchar_t in_w[IDN_MAX_LENGTH];
209		int in_w_len;
210		*out = NULL;
211		/* Returned in_w_len includes the null-terminator, which then gets
212		preserved across the calls that follow, ending up terminating
213		the buffer returned to the caller. */
214		in_w_len = MultiByteToWideChar(CP_UTF8, 0, in, -1, in_w, IDN_MAX_LENGTH);
215		if(in_w_len) {
216		WCHAR idn[IDN_MAX_LENGTH]; /* stores a UTF-16 string */
217		int chars = IdnToUnicode(0, in_w, in_w_len, idn, IDN_MAX_LENGTH);
218		if(chars > 0) { /* 'chars' is "the number of characters retrieved" */
219		*out = idn_curlx_convert_wchar_to_UTF8(idn, chars);
220		if(!*out)
221		return CURLE_OUT_OF_MEMORY;
222		}
223		else
224		return CURLE_URL_MALFORMAT;
225		}
226		else
227		return CURLE_URL_MALFORMAT;
228
229		return CURLE_OK;
230		}
231
232		#endif /* USE_WIN32_IDN */
233
234		/*
235		* Helpers for IDNA conversions.
236		*/
237		bool Curl_is_ASCII_name(const char *hostname)
238	345k	{
239		/* get an UNSIGNED local version of the pointer */
240	345k	const unsigned char ch = (const unsigned char )hostname;
241
242	345k	if(!hostname) /* bad input, consider it ASCII! */
243	103	return TRUE;
244
245	6.02M	while(*ch) {
246	5.68M	if(*ch++ & 0x80)
247	1.88k	return FALSE;
248	5.68M	}
249	343k	return TRUE;
250	345k	}
251
252		#ifdef USE_IDN
253		/*
254		* Curl_idn_decode() returns an allocated IDN decoded string if it was
255		* possible. NULL on error.
256		*
257		* CURLE_URL_MALFORMAT - the hostname could not be converted
258		* CURLE_OUT_OF_MEMORY - memory problem
259		*
260		*/
261		static CURLcode idn_decode(const char input, char *output)
262	1.86k	{
263	1.86k	char *decoded = NULL;
264	1.86k	CURLcode result = CURLE_OK;
265	1.86k	#ifdef USE_LIBIDN2
266	1.86k	if(idn2_check_version(IDN2_VERSION)) {
267	1.86k	int flags = IDN2_NFC_INPUT
268	1.86k	#if IDN2_VERSION_NUMBER >= 0x00140000
269		/* IDN2_NFC_INPUT: Normalize input string using normalization form C.
270		IDN2_NONTRANSITIONAL: Perform Unicode TR46 non-transitional
271		processing. */
272	1.86k	\| IDN2_NONTRANSITIONAL
273	1.86k	#endif
274	1.86k	;
275	1.86k	int rc = IDN2_LOOKUP(input, &decoded, flags);
276	1.86k	if(rc != IDN2_OK)
277		/* fallback to TR46 Transitional mode for better IDNA2003
278		compatibility */
279	1.86k	rc = IDN2_LOOKUP(input, &decoded, IDN2_TRANSITIONAL);
280	1.86k	if(rc != IDN2_OK)
281	1.86k	result = CURLE_URL_MALFORMAT;
282	1.86k	}
283	0	else
284		/* a too old libidn2 version */
285	0	result = CURLE_NOT_BUILT_IN;
286		#elif defined(USE_WIN32_IDN)
287		result = win32_idn_to_ascii(input, &decoded);
288		#elif defined(USE_APPLE_IDN)
289		result = mac_idn_to_ascii(input, &decoded);
290		#endif
291	1.86k	if(!result)
292	0	*output = decoded;
293	1.86k	return result;
294	1.86k	}
295
296		static CURLcode idn_encode(const char puny, char *output)
297	0	{
298	0	char *enc = NULL;
299	0	#ifdef USE_LIBIDN2
300	0	int rc = idn2_to_unicode_8z8z(puny, &enc, 0);
301	0	if(rc != IDNA_SUCCESS)
302	0	return rc == IDNA_MALLOC_ERROR ? CURLE_OUT_OF_MEMORY : CURLE_URL_MALFORMAT;
303		#elif defined(USE_WIN32_IDN)
304		CURLcode result = win32_ascii_to_idn(puny, &enc);
305		if(result)
306		return result;
307		#elif defined(USE_APPLE_IDN)
308		CURLcode result = mac_ascii_to_idn(puny, &enc);
309		if(result)
310		return result;
311		#endif
312	0	*output = enc;
313	0	return CURLE_OK;
314	0	}
315
316		CURLcode Curl_idn_decode(const char input, char *output)
317	1.86k	{
318	1.86k	char *d = NULL;
319	1.86k	CURLcode result = idn_decode(input, &d);
320	1.86k	#ifdef USE_LIBIDN2
321	1.86k	if(!result) {
322	0	char *c = curlx_strdup(d);
323	0	idn2_free(d);
324	0	if(c)
325	0	d = c;
326	0	else
327	0	result = CURLE_OUT_OF_MEMORY;
328	0	}
329	1.86k	#endif
330	1.86k	if(!result) {
331	0	if(!d[0]) { /* ended up zero length, not acceptable */
332	0	result = CURLE_URL_MALFORMAT;
333	0	curlx_free(d);
334	0	}
335	0	else
336	0	*output = d;
337	0	}
338	1.86k	return result;
339	1.86k	}
340
341		CURLcode Curl_idn_encode(const char puny, char *output)
342	0	{
343	0	char *d = NULL;
344	0	CURLcode result = idn_encode(puny, &d);
345	0	#ifdef USE_LIBIDN2
346	0	if(!result) {
347	0	char *c = curlx_strdup(d);
348	0	idn2_free(d);
349	0	if(c)
350	0	d = c;
351	0	else
352	0	result = CURLE_OUT_OF_MEMORY;
353	0	}
354	0	#endif
355	0	if(!result)
356	0	*output = d;
357	0	return result;
358	0	}
359
360		/*
361		* Frees data allocated by idnconvert_hostname()
362		*/
363		void Curl_free_idnconverted_hostname(struct hostname *host)
364	698k	{
365	698k	Curl_safefree(host->encalloc);
366	698k	}
367
368		#endif /* USE_IDN */
369
370		/*
371		* Perform any necessary IDN conversion of hostname
372		*/
373		CURLcode Curl_idnconvert_hostname(struct hostname *host)
374	344k	{
375		/* set the name we use to display the hostname */
376	344k	host->dispname = host->name;
377
378	344k	#ifdef USE_IDN
379		/* Check name for non-ASCII and convert hostname if we can */
380	344k	if(!Curl_is_ASCII_name(host->name)) {
381	1.86k	char *decoded;
382	1.86k	CURLcode result = Curl_idn_decode(host->name, &decoded);
383	1.86k	if(result)
384	1.86k	return result;
385		/* successful */
386	0	host->name = host->encalloc = decoded;
387	0	}
388	342k	#endif
389	342k	return CURLE_OK;
390	344k	}