LCOV - code coverage report
Current view: top level - builds/gnutls/coverage/gnutls-git/lib - fingerprint.c (source / functions) Hit Total Coverage
Test: GnuTLS-3.6.14 Code Coverage Lines: 10 13 76.9 %
Date: 2020-10-30 04:50:48 Functions: 1 1 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /*
       2             :  * Copyright (C) 2001-2012 Free Software Foundation, Inc.
       3             :  *
       4             :  * Author: Nikos Mavrogiannopoulos
       5             :  *
       6             :  * This file is part of GnuTLS.
       7             :  *
       8             :  * The GnuTLS is free software; you can redistribute it and/or
       9             :  * modify it under the terms of the GNU Lesser General Public License
      10             :  * as published by the Free Software Foundation; either version 2.1 of
      11             :  * the License, or (at your option) any later version.
      12             :  *
      13             :  * This library is distributed in the hope that it will be useful, but
      14             :  * WITHOUT ANY WARRANTY; without even the implied warranty of
      15             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      16             :  * Lesser General Public License for more details.
      17             :  *
      18             :  * You should have received a copy of the GNU Lesser General Public License
      19             :  * along with this program.  If not, see <https://www.gnu.org/licenses/>
      20             :  *
      21             :  */
      22             : 
      23             : #include "gnutls_int.h"
      24             : #include <auth/srp_kx.h>
      25             : #include <auth/anon.h>
      26             : #include <auth/cert.h>
      27             : #include <auth/psk.h>
      28             : #include "errors.h"
      29             : #include <auth.h>
      30             : #include <state.h>
      31             : #include <datum.h>
      32             : #include <algorithms.h>
      33             : 
      34             : /**
      35             :  * gnutls_fingerprint:
      36             :  * @algo: is a digest algorithm
      37             :  * @data: is the data
      38             :  * @result: is the place where the result will be copied (may be null).
      39             :  * @result_size: should hold the size of the result. The actual size
      40             :  * of the returned result will also be copied there.
      41             :  *
      42             :  * This function will calculate a fingerprint (actually a hash), of
      43             :  * the given data.  The result is not printable data.  You should
      44             :  * convert it to hex, or to something else printable.
      45             :  *
      46             :  * This is the usual way to calculate a fingerprint of an X.509 DER
      47             :  * encoded certificate.  Note however that the fingerprint of an
      48             :  * OpenPGP certificate is not just a hash and cannot be calculated with this
      49             :  * function.
      50             :  *
      51             :  * Returns: On success, %GNUTLS_E_SUCCESS (0) is returned, otherwise
      52             :  *   an error code is returned.
      53             :  **/
      54             : int
      55        1597 : gnutls_fingerprint(gnutls_digest_algorithm_t algo,
      56             :                    const gnutls_datum_t * data, void *result,
      57             :                    size_t * result_size)
      58             : {
      59        1597 :         int ret;
      60        1597 :         int hash_len = _gnutls_hash_get_algo_len(hash_to_entry(algo));
      61             : 
      62        1597 :         if (hash_len < 0 || (unsigned) hash_len > *result_size
      63        1597 :             || result == NULL) {
      64           0 :                 *result_size = hash_len;
      65           0 :                 return GNUTLS_E_SHORT_MEMORY_BUFFER;
      66             :         }
      67        1597 :         *result_size = hash_len;
      68             : 
      69        1597 :         if (result) {
      70        1597 :                 ret =
      71        1597 :                     _gnutls_hash_fast(algo, data->data, data->size,
      72             :                                       result);
      73        1597 :                 if (ret < 0)
      74           0 :                         return gnutls_assert_val(ret);
      75             :         }
      76             : 
      77             :         return 0;
      78             : }
      79             : 
      80             : 

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