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tests: ccm: Prepare to char* to data_t* type change

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In preparation of changing the type of some parameters
of mbedtls_ccm_star_encrypt_and_tag/auth_decrypt from
`char *` to `data_t` to get rid of the calls to
mbedtls_test_unhexify():

- Change the name of parameters and local variables to
  clarify which ones are related to the outputs of the
  library functions under test and which ones are
  related to the expected values of those outputs.

- Use two different buffers to store the plain and cipher
  text as expected by the library functions.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
This commit is contained in:
Ronald Cron 2020-06-25 14:47:40 +02:00
parent df02eb00e0
commit c7ba560481
1 changed files with 21 additions and 19 deletions
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40
tests/suites/test_suite_ccm.function
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@ -195,17 +195,18 @@ void mbedtls_ccm_star_encrypt_and_tag( int cipher_id,
char *key_hex, char *msg_hex,
char *source_address_hex, char *frame_counter_hex,
int sec_level, char *add_hex,
char *result_hex, int output_ret )
char *expected_result_hex, int output_ret )
{
unsigned char key[32];
unsigned char msg[50];
unsigned char iv[13];
unsigned char add[32];
unsigned char result[50];
unsigned char expected_result[50];
unsigned char source_address[8];
unsigned char frame_counter[4];
mbedtls_ccm_context ctx;
size_t i, key_len, msg_len, iv_len, add_len, result_len, source_address_len, frame_counter_len, tag_len;
size_t i, key_len, msg_len, iv_len, add_len, expected_result_len, source_address_len, frame_counter_len, tag_len;
int ret;
mbedtls_ccm_init( &ctx );
@ -215,13 +216,14 @@ void mbedtls_ccm_star_encrypt_and_tag( int cipher_id,
memset( iv, 0x00, sizeof( iv ) );
memset( add, 0x00, sizeof( add ) );
memset( result, 0x00, sizeof( result ) );
memset( expected_result, 0x00, sizeof( expected_result ) );
memset( source_address, 0x00, sizeof( source_address ) );
memset( frame_counter, 0x00, sizeof( frame_counter ) );
key_len = mbedtls_test_unhexify( key, key_hex );
msg_len = mbedtls_test_unhexify( msg, msg_hex );
add_len = mbedtls_test_unhexify( add, add_hex );
result_len = mbedtls_test_unhexify( result, result_hex );
expected_result_len = mbedtls_test_unhexify( expected_result, expected_result_hex );
source_address_len = mbedtls_test_unhexify( source_address,
source_address_hex );
frame_counter_len = mbedtls_test_unhexify( frame_counter,
@ -244,14 +246,15 @@ void mbedtls_ccm_star_encrypt_and_tag( int cipher_id,
TEST_ASSERT( mbedtls_ccm_setkey( &ctx, cipher_id, key, key_len * 8 ) == 0 );
ret = mbedtls_ccm_star_encrypt_and_tag( &ctx, msg_len, iv, iv_len,
add, add_len, msg, msg, msg + msg_len, tag_len );
add, add_len, msg, result, result + msg_len, tag_len );
TEST_ASSERT( ret == output_ret );
TEST_ASSERT( memcmp( msg, result, result_len ) == 0 );
TEST_ASSERT( memcmp( result, expected_result, expected_result_len ) == 0 );
/* Check we didn't write past the end */
TEST_ASSERT( msg[result_len] == 0 && msg[result_len + 1] == 0 );
TEST_ASSERT( result[expected_result_len] == 0 &&
result[expected_result_len + 1] == 0 );
exit:
mbedtls_ccm_free( &ctx );
@ -263,18 +266,18 @@ void mbedtls_ccm_star_auth_decrypt( int cipher_id,
char *key_hex, char *msg_hex,
char *source_address_hex, char *frame_counter_hex,
int sec_level, char *add_hex,
char *result_hex, int output_ret )
char *expected_result_hex, int output_ret )
{
unsigned char key[32];
unsigned char msg[50];
unsigned char iv[13];
unsigned char add[32];
unsigned char tag[16];
unsigned char result[50];
unsigned char expected_result[50];
unsigned char source_address[8];
unsigned char frame_counter[4];
mbedtls_ccm_context ctx;
size_t i, key_len, msg_len, iv_len, add_len, tag_len, result_len, source_address_len, frame_counter_len;
size_t i, key_len, msg_len, iv_len, add_len, tag_len, expected_result_len, source_address_len, frame_counter_len;
int ret;
mbedtls_ccm_init( &ctx );
@ -283,15 +286,15 @@ void mbedtls_ccm_star_auth_decrypt( int cipher_id,
memset( msg, 0x00, sizeof( msg ) );
memset( iv, 0x00, sizeof( iv ) );
memset( add, 0x00, sizeof( add ) );
memset( result, 0x00, sizeof( result ) );
memset( result, '+', sizeof( result ) );
memset( expected_result, 0x00, sizeof( expected_result ) );
memset( source_address, 0x00, sizeof( source_address ) );
memset( frame_counter, 0x00, sizeof( frame_counter ) );
memset( tag, 0x00, sizeof( tag ) );
key_len = mbedtls_test_unhexify( key, key_hex );
msg_len = mbedtls_test_unhexify( msg, msg_hex );
add_len = mbedtls_test_unhexify( add, add_hex );
result_len = mbedtls_test_unhexify( result, result_hex );
expected_result_len = mbedtls_test_unhexify( expected_result, expected_result_hex );
source_address_len = mbedtls_test_unhexify( source_address,
source_address_hex );
frame_counter_len = mbedtls_test_unhexify( frame_counter,
@ -311,20 +314,19 @@ void mbedtls_ccm_star_auth_decrypt( int cipher_id,
iv[source_address_len + frame_counter_len] = sec_level;
iv_len = sizeof( iv );
msg_len -= tag_len;
memcpy( tag, msg + msg_len, tag_len );
TEST_ASSERT( mbedtls_ccm_setkey( &ctx, cipher_id, key, key_len * 8 ) == 0 );
ret = mbedtls_ccm_star_auth_decrypt( &ctx, msg_len, iv, iv_len,
add, add_len, msg, msg, msg + msg_len, tag_len );
ret = mbedtls_ccm_star_auth_decrypt( &ctx, msg_len - tag_len, iv, iv_len,
add, add_len, msg, result, msg + msg_len - tag_len, tag_len );
TEST_ASSERT( ret == output_ret );
TEST_ASSERT( memcmp( msg, result, result_len ) == 0 );
TEST_ASSERT( memcmp( result, expected_result, expected_result_len ) == 0 );
/* Check we didn't write past the end (where the original tag is) */
TEST_ASSERT( memcmp( msg + msg_len, tag, tag_len ) == 0 );
TEST_ASSERT( ( msg_len + 2 ) <= sizeof( result ) );
TEST_EQUAL( result[msg_len], '+' );
TEST_EQUAL( result[msg_len + 1], '+' );
exit:
mbedtls_ccm_free( &ctx );