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/*
* test_srtp.c
*
* Unit tests for internal srtp functions
*
* Cisco Systems, Inc.
*
*/
/*
*
* Copyright (c) 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.
*
*/
/*
* Test specific.
*/
#include "cutest.h"
/*
* libSRTP specific.
*/
#include "../srtp/srtp.c" // Get access to static functions
/*
* Standard library.
*/
/*
* Forward declarations for all tests.
*/
void srtp_calc_aead_iv_srtcp_all_zero_input_yield_zero_output(void);
void srtp_calc_aead_iv_srtcp_seq_num_over_0x7FFFFFFF_bad_param(void);
void srtp_calc_aead_iv_srtcp_distinct_iv_per_sequence_number(void);
/*
* NULL terminated array of tests.
* The first item in the array is a char[] which give some information about
* what is being tested and is displayed to the user during runtime, the second
* item is the test function.
*/
TEST_LIST = { { "srtp_calc_aead_iv_srtcp_all_zero_input_yield_zero_output()",
srtp_calc_aead_iv_srtcp_all_zero_input_yield_zero_output },
{ "srtp_calc_aead_iv_srtcp_seq_num_over_0x7FFFFFFF_bad_param()",
srtp_calc_aead_iv_srtcp_seq_num_over_0x7FFFFFFF_bad_param },
{ "srtp_calc_aead_iv_srtcp_distinct_iv_per_sequence_number()",
srtp_calc_aead_iv_srtcp_distinct_iv_per_sequence_number },
{ NULL } /* End of tests */ };
/*
* Implementation.
*/
void srtp_calc_aead_iv_srtcp_all_zero_input_yield_zero_output()
{
// Preconditions
srtp_session_keys_t session_keys;
v128_t init_vector;
srtcp_hdr_t header;
uint32_t sequence_num;
// Postconditions
srtp_err_status_t status;
const v128_t zero_vector;
memset((v128_t *)&zero_vector, 0, sizeof(v128_t));
// Given
memset(&session_keys, 0, sizeof(srtp_session_keys_t));
memset(&init_vector, 0, sizeof(v128_t));
memset(&header, 0, sizeof(srtcp_hdr_t));
sequence_num = 0x0UL;
// When
status = srtp_calc_aead_iv_srtcp(&session_keys, &init_vector, sequence_num,
&header);
// Then
TEST_CHECK(status == srtp_err_status_ok);
TEST_CHECK(memcmp(&zero_vector, &init_vector, sizeof(v128_t)) == 0);
}
void srtp_calc_aead_iv_srtcp_seq_num_over_0x7FFFFFFF_bad_param()
{
// Preconditions
srtp_session_keys_t session_keys;
v128_t init_vector;
srtcp_hdr_t header;
uint32_t sequence_num;
// Postconditions
srtp_err_status_t status;
// Given
memset(&session_keys, 0, sizeof(srtp_session_keys_t));
memset(&init_vector, 0, sizeof(v128_t));
memset(&header, 0, sizeof(srtcp_hdr_t));
sequence_num = 0x7FFFFFFFUL + 0x1UL;
// When
status = srtp_calc_aead_iv_srtcp(&session_keys, &init_vector, sequence_num,
&header);
// Then
TEST_CHECK(status == srtp_err_status_bad_param);
}
/*
* Regression test for issue #256:
* Srtcp IV calculation incorrectly masks high bit of sequence number for
* little-endian platforms.
* Ensure that for each valid sequence number where the most significant bit is
* high that we get an expected and unique IV.
*/
void srtp_calc_aead_iv_srtcp_distinct_iv_per_sequence_number()
{
#define SAMPLE_COUNT (3)
// Preconditions
// Test each significant bit high in each full byte.
srtp_session_keys_t session_keys;
srtcp_hdr_t header;
v128_t output_iv[SAMPLE_COUNT];
memset(&output_iv, 0, SAMPLE_COUNT * sizeof(v128_t));
uint32_t sequence_num[SAMPLE_COUNT];
sequence_num[0] = 0xFF;
sequence_num[1] = 0xFF00;
sequence_num[2] = 0xFF0000;
// Postconditions
v128_t final_iv[SAMPLE_COUNT];
memset(&final_iv, 0, SAMPLE_COUNT * sizeof(v128_t));
final_iv[0].v8[11] = 0xFF;
final_iv[1].v8[10] = 0xFF;
final_iv[2].v8[9] = 0xFF;
// Given
memset(&session_keys, 0, sizeof(srtp_session_keys_t));
memset(&header, 0, sizeof(srtcp_hdr_t));
// When
size_t i = 0;
for (i = 0; i < SAMPLE_COUNT; i++) {
TEST_CHECK(srtp_calc_aead_iv_srtcp(&session_keys, &output_iv[i],
sequence_num[i],
&header) == srtp_err_status_ok);
}
// Then all IVs are as expected
for (i = 0; i < SAMPLE_COUNT; i++) {
TEST_CHECK(memcmp(&final_iv[i], &output_iv[i], sizeof(v128_t)) == 0);
}
#undef SAMPLE_COUNT
}
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