md5pwd.c

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/* md5pwd.c --- Find passwords in UoW imapd MD5 type password files.
 * Copyright (C) 2002-2024 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 License along with GNU SASL Library; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */
 
#include <config.h>
#include "internal.h"
 
int
gsasl_simple_getpass (const char *filename, const char *username, char **key)
{
  size_t userlen = strlen (username);
  char *line = NULL;
  size_t n = 0;
  FILE *fh;
 
  fh = fopen (filename, "r");
  if (fh)
    {
      while (!feof (fh))
        {
          if (getline (&line, &n, fh) < 0)
            break;
 
          if (line[0] == '#')
            continue;
 
          if (line[strlen (line) - 1] == '\r')
            line[strlen (line) - 1] = '\0';
          if (line[strlen (line) - 1] == '\n')
            line[strlen (line) - 1] = '\0';
 
          if (strncmp (line, username, userlen) == 0 && line[userlen] == '\t')
            {
              *key = malloc (strlen (line) - userlen);
              if (!*key)
                {
                  free (line);
                  return GSASL_MALLOC_ERROR;
                }
 
              strcpy (*key, line + userlen + 1);
 
              free (line);
 
              fclose (fh);
 
              return GSASL_OK;
            }
        }
 
      fclose (fh);
    }
 
  free (line);
 
  return GSASL_AUTHENTICATION_ERROR;
}