saslprep.c

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/* saslprep.c --- Internationalized SASL string processing.
 * Copyright (C) 2002-2025 Simon Josefsson
 *
 * This file is part of GNU SASL Library.
 *
 * GNU SASL Library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * GNU SASL Library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with GNU SASL Library; if not, see
 * <https://www.gnu.org/licenses/>.
 *
 */
 
#include <config.h>
#include "internal.h"
 
#if HAVE_LIBIDN
 
# include <stringprep.h>
 
# if defined HAVE_PR29_H && defined HAVE_PR29_8Z
#  include <pr29.h>
 
# endif
 
int
gsasl_saslprep (const char *in, Gsasl_saslprep_flags flags,
                char **out, int *stringpreprc)
{
  int rc;
 
  rc = stringprep_profile (in, out, "SASLprep",
                           (flags & GSASL_ALLOW_UNASSIGNED)
                           ? STRINGPREP_NO_UNASSIGNED : 0);
 
  if (stringpreprc)
    *stringpreprc = rc;
 
  if (rc != STRINGPREP_OK)
    {
      *out = NULL;
      return GSASL_SASLPREP_ERROR;
    }
 
# if defined HAVE_PR29_8Z && defined HAVE_PR29_H
  if (pr29_8z (*out) != PR29_SUCCESS)
    {
      free (*out);
      *out = NULL;
      if (stringpreprc)
        *stringpreprc = STRINGPREP_NFKC_FAILED;
 
      return GSASL_SASLPREP_ERROR;
    }
# endif
 
  return GSASL_OK;
}
 
#else /* HAVE_LIBIDN */
 
int
gsasl_saslprep (const char *in, Gsasl_saslprep_flags flags _GL_UNUSED,
                char **out, int *stringpreprc _GL_UNUSED)
{
  size_t i, inlen = strlen (in);
 
  for (i = 0; i < inlen; i++)
    if (in[i] & 0x80)
      {
        *out = NULL;
        return GSASL_SASLPREP_ERROR;
      }
 
  *out = malloc (inlen + 1);
  if (!*out)
    return GSASL_MALLOC_ERROR;
  strcpy (*out, in);
 
  return GSASL_OK;
}
 
#endif