1  /* Wrapper for hmac openssl implementation.
       2   *
       3   * Copyright (c) 2021 Red Hat, Inc.
       4   * Written by Iker Pedrosa <ipedrosa@redhat.com>
       5   *
       6   * Redistribution and use in source and binary forms, with or without
       7   * modification, are permitted provided that the following conditions
       8   * are met:
       9   * 1. Redistributions of source code must retain the above copyright
      10   *    notice, and the entire permission notice in its entirety,
      11   *    including the disclaimer of warranties.
      12   * 2. Redistributions in binary form must reproduce the above copyright
      13   *    notice, this list of conditions and the following disclaimer in the
      14   *    documentation and/or other materials provided with the distribution.
      15   * 3. The name of the author may not be used to endorse or promote
      16   *    products derived from this software without specific prior
      17   *    written permission.
      18   *
      19   * ALTERNATIVELY, this product may be distributed under the terms of
      20   * the GNU Public License, in which case the provisions of the GPL are
      21   * required INSTEAD OF the above restrictions.  (This clause is
      22   * necessary due to a potential bad interaction between the GPL and
      23   * the restrictions contained in a BSD-style copyright.)
      24   *
      25   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
      26   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
      27   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
      28   * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
      29   * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
      30   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
      31   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      32   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
      33   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
      34   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
      35   * OF THE POSSIBILITY OF SUCH DAMAGE.
      36   *
      37   */
      38  #ifndef PAM_TIMESTAMP_HMAC_OPENSSL_WRAPPER_H
      39  #define PAM_TIMESTAMP_HMAC_OPENSSL_WRAPPER_H
      40  
      41  #include "config.h"
      42  
      43  #ifdef WITH_OPENSSL
      44  
      45  #include <openssl/hmac.h>
      46  #include <security/pam_modules.h>
      47  
      48  int
      49  hmac_size(pam_handle_t *pamh, int debug, size_t *hmac_length);
      50  
      51  int
      52  hmac_generate(pam_handle_t *pamh, int debug, void **mac, size_t *mac_length,
      53                const char *key_file, uid_t owner, gid_t group,
      54                const void *text, size_t text_length);
      55  
      56  #endif /* WITH_OPENSSL */
      57  #endif /* PAM_TIMESTAMP_HMAC_OPENSSL_WRAPPER_H */