lib/src/saslprep.c

   1 /* saslprep.c --- Internationalized SASL string processing.
   2  * Copyright (C) 2002, 2003, 2004, 2005  Simon Josefsson
   3  *
   4  * This file is part of GNU SASL Library.
   5  *
   6  * GNU SASL Library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public License
   8  * as published by the Free Software Foundation; either version 2.1 of
   9  * the License, or (at your option) any later version.
  10  *
  11  * GNU SASL Library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License License along with GNU SASL Library; if not, write to the
  18  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19  * Boston, MA 02110-1301, USA.
  20  *
  21  */
  22
  23 #include "internal.h"
  24
  25 #if HAVE_LIBIDN
  26 # include <stringprep.h>
  27 # if defined (HAVE_PR29_H) && defined (HAVE_PR29_8Z)
  28 #  include <pr29.h>
  29 # endif
  30 #endif
  31
  32 /**
  33  * gsasl_saslprep - prepare internationalized string
  34  * @in: a UTF-8 encoded string.
  35  * @flags: any SASLprep flag, e.g., %GSASL_ALLOW_UNASSIGNED.
  36  * @out: on exit, contains newly allocated output string.
  37  * @stringpreprc: if non-NULL, will hold precise stringprep return code.
  38  *
  39  * Prepare string using SASLprep.  On success, the @out variable must
  40  * be deallocated by the caller.
  41  *
  42  * Return value: Returns %GSASL_OK on success, or
  43  * %GSASL_SASLPREP_ERROR on error.
  44  *
  45  * Since: 0.2.3
  46  **/
  47 int
  48 gsasl_saslprep (const char *in, Gsasl_saslprep_flags flags,
  49                 char **out, int *stringpreprc)
  50 {
  51 #if HAVE_LIBIDN
  52   int rc;
  53
  54   rc = stringprep_profile (in, out, "SASLprep",
  55                            (flags & GSASL_ALLOW_UNASSIGNED)
  56                            ? STRINGPREP_NO_UNASSIGNED : 0);
  57
  58   if (stringpreprc)
  59     *stringpreprc = rc;
  60
  61   if (rc != STRINGPREP_OK)
  62     {
  63       *out = NULL;
  64       return GSASL_SASLPREP_ERROR;
  65     }
  66
  67 # if defined (HAVE_PR29_8Z) && defined (HAVE_PR29_H)
  68   if (pr29_8z (*out) != PR29_SUCCESS)
  69     {
  70       free (*out);
  71       *out = NULL;
  72       if (stringpreprc)
  73         *stringpreprc = STRINGPREP_NFKC_FAILED;
  74
  75       return GSASL_SASLPREP_ERROR;
  76     }
  77 #endif
  78
  79 #else
  80   size_t i, inlen = strlen (in);
  81
  82   for (i = 0; i < inlen; i++)
  83     if (in[i] & 0x80)
  84       {
  85         *out = NULL;
  86         return GSASL_SASLPREP_ERROR;
  87       }
  88
  89   *out = malloc (inlen + 1);
  90   if (!*out)
  91     return GSASL_MALLOC_ERROR;
  92   strcpy (*out, in);
  93 #endif
  94
  95   return GSASL_OK;
  96 }