lib/idn_win32.c

   1 /***************************************************************************
   2  *                                  _   _ ____  _
   3  *  Project                     ___| | | |  _ \| |
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   7  *
   8  * Copyright (C) 1998 - 2016, 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.haxx.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  ***************************************************************************/
  22
  23  /*
  24   * IDN conversions using Windows kernel32 and normaliz libraries.
  25   */
  26
  27 #include "curl_setup.h"
  28
  29 #ifdef USE_WIN32_IDN
  30
  31 #include "curl_multibyte.h"
  32 #include "curl_memory.h"
  33 #include "warnless.h"
  34
  35   /* The last #include file should be: */
  36 #include "memdebug.h"
  37
  38 #ifdef WANT_IDN_PROTOTYPES
  39 #  if defined(_SAL_VERSION)
  40 WINNORMALIZEAPI int WINAPI
  41 IdnToAscii(_In_                           DWORD    dwFlags,
  42            _In_reads_(cchUnicodeChar)     LPCWSTR  lpUnicodeCharStr,
  43            _In_                           int      cchUnicodeChar,
  44            _Out_writes_opt_(cchASCIIChar) LPWSTR   lpASCIICharStr,
  45            _In_                           int      cchASCIIChar);
  46 WINNORMALIZEAPI int WINAPI
  47 IdnToUnicode(_In_                             DWORD   dwFlags,
  48              _In_reads_(cchASCIIChar)         LPCWSTR lpASCIICharStr,
  49              _In_                             int     cchASCIIChar,
  50              _Out_writes_opt_(cchUnicodeChar) LPWSTR  lpUnicodeCharStr,
  51              _In_                             int     cchUnicodeChar);
  52 #  else
  53 WINBASEAPI int WINAPI IdnToAscii(DWORD dwFlags,
  54                                  const WCHAR *lpUnicodeCharStr,
  55                                  int cchUnicodeChar,
  56                                  WCHAR *lpASCIICharStr,
  57                                  int cchASCIIChar);
  58 WINBASEAPI int WINAPI IdnToUnicode(DWORD dwFlags,
  59                                    const WCHAR *lpASCIICharStr,
  60                                    int cchASCIIChar,
  61                                    WCHAR *lpUnicodeCharStr,
  62                                    int cchUnicodeChar);
  63 #  endif
  64 #endif
  65
  66 #define IDN_MAX_LENGTH 255
  67
  68 bool curl_win32_idn_to_ascii(const char *in, char **out);
  69 bool curl_win32_ascii_to_idn(const char *in, char **out);
  70
  71 bool curl_win32_idn_to_ascii(const char *in, char **out)
  72 {
  73   bool success = FALSE;
  74
  75   wchar_t *in_w = Curl_convert_UTF8_to_wchar(in);
  76   if(in_w) {
  77     wchar_t punycode[IDN_MAX_LENGTH];
  78     int chars = IdnToAscii(0, in_w, -1, punycode, IDN_MAX_LENGTH);
  79     free(in_w);
  80     if(chars) {
  81       *out = Curl_convert_wchar_to_UTF8(punycode);
  82       if(*out)
  83         success = TRUE;
  84     }
  85   }
  86
  87   return success;
  88 }
  89
  90 bool curl_win32_ascii_to_idn(const char *in, char **out)
  91 {
  92   bool success = FALSE;
  93
  94   wchar_t *in_w = Curl_convert_UTF8_to_wchar(in);
  95   if(in_w) {
  96     size_t in_len = wcslen(in_w) + 1;
  97     wchar_t unicode[IDN_MAX_LENGTH];
  98     int chars = IdnToUnicode(0, in_w, curlx_uztosi(in_len),
  99                              unicode, IDN_MAX_LENGTH);
 100     free(in_w);
 101     if(chars) {
 102       *out = Curl_convert_wchar_to_UTF8(unicode);
 103       if(*out)
 104         success = TRUE;
 105     }
 106   }
 107
 108   return success;
 109 }
 110
 111 #endif /* USE_WIN32_IDN */