hmac_ossl.c | Explore in Territory

/*
 * hmac_ossl.c
 *
 * Implementation of hmac srtp_auth_type_t that leverages OpenSSL
 *
 * John A. Foley
 * Cisco Systems, Inc.
 */
/*
 *
 * Copyright(c) 2013-2017, Cisco Systems, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 *   Redistributions in binary form must reproduce the above
 *   copyright notice, this list of conditions and the following
 *   disclaimer in the documentation and/or other materials provided
 *   with the distribution.
 *
 *   Neither the name of the Cisco Systems, Inc. nor the names of its
 *   contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "auth.h"
#include "alloc.h"
#include "err.h" /* for srtp_debug */
#include <openssl/evp.h>
#include <openssl/hmac.h>

#define SHA1_DIGEST_SIZE …

/* the debug module for authentiation */

srtp_debug_module_t srtp_mod_hmac = …;

static srtp_err_status_t srtp_hmac_alloc(srtp_auth_t **a,
                                         int key_len,
                                         int out_len)
{ … }

static srtp_err_status_t srtp_hmac_dealloc(srtp_auth_t *a)
{ … }

static srtp_err_status_t srtp_hmac_start(void *statev)
{ … }

static srtp_err_status_t srtp_hmac_init(void *statev,
                                        const uint8_t *key,
                                        int key_len)
{ … }

static srtp_err_status_t srtp_hmac_update(void *statev,
                                          const uint8_t *message,
                                          int msg_octets)
{ … }

static srtp_err_status_t srtp_hmac_compute(void *statev,
                                           const uint8_t *message,
                                           int msg_octets,
                                           int tag_len,
                                           uint8_t *result)
{ … }

/* begin test case 0 */
/* clang-format off */
static const uint8_t srtp_hmac_test_case_0_key[SHA1_DIGEST_SIZE] = …;
/* clang-format on */

/* clang-format off */
static const uint8_t srtp_hmac_test_case_0_data[8] = …;
/* clang-format on */

/* clang-format off */
static const uint8_t srtp_hmac_test_case_0_tag[SHA1_DIGEST_SIZE] = …;
/* clang-format on */

static const srtp_auth_test_case_t srtp_hmac_test_case_0 = …;

/* end test case 0 */

static const char srtp_hmac_description[] = …;

/*
 * srtp_auth_type_t hmac is the hmac metaobject
 */

const srtp_auth_type_t srtp_hmac = …;
chromium/third_party/libsrtp/crypto/hash/hmac_ossl.c
