mirror of
https://github.com/yuzu-emu/mbedtls.git
synced 2024-12-11 13:44:24 +01:00
b168c0d2e6
Check that the source address and the frame counter have the expected
length. Otherwise, if the test data was invalid, the test code could
build nonsensical inputs, potentially overflowing the iv buffer.
The primary benefit of this change is that it also silences a warning
from compiling with `gcc-10 -O3` (observed with GCC 10.2.0 on
Linux/amd64). GCC unrolled the loops and complained about a buffer
overflow with warnings like:
```
suites/test_suite_ccm.function: In function 'test_mbedtls_ccm_star_auth_decrypt':
suites/test_suite_ccm.function:271:15: error: writing 1 byte into a region of size 0 [-Werror=stringop-overflow=]
271 | iv[i] = source_address->x[i];
| ~~~~~~^~~~~~~~~~~~~~~~~~~~~~
suites/test_suite_ccm.function:254:19: note: at offset [13, 14] to object 'iv' with size 13 declared here
254 | unsigned char iv[13];
```
Just using memcpy instead of loops bypasses this warnings. The added
checks are a bonus.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
507 lines
18 KiB
Plaintext
507 lines
18 KiB
Plaintext
/* BEGIN_HEADER */
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#include "mbedtls/ccm.h"
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/* END_HEADER */
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/* BEGIN_DEPENDENCIES
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* depends_on:MBEDTLS_CCM_C
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* END_DEPENDENCIES
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*/
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/* BEGIN_CASE depends_on:MBEDTLS_SELF_TEST:MBEDTLS_AES_C */
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void mbedtls_ccm_self_test( )
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{
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TEST_ASSERT( mbedtls_ccm_self_test( 1 ) == 0 );
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void mbedtls_ccm_setkey( int cipher_id, int key_size, int result )
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{
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mbedtls_ccm_context ctx;
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unsigned char key[32];
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int ret;
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mbedtls_ccm_init( &ctx );
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memset( key, 0x2A, sizeof( key ) );
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TEST_ASSERT( (unsigned) key_size <= 8 * sizeof( key ) );
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ret = mbedtls_ccm_setkey( &ctx, cipher_id, key, key_size );
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TEST_ASSERT( ret == result );
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exit:
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mbedtls_ccm_free( &ctx );
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}
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/* END_CASE */
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/* BEGIN_CASE depends_on:MBEDTLS_AES_C */
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void ccm_lengths( int msg_len, int iv_len, int add_len, int tag_len, int res )
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{
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mbedtls_ccm_context ctx;
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unsigned char key[16];
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unsigned char msg[10];
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unsigned char iv[14];
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unsigned char *add = NULL;
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unsigned char out[10];
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unsigned char tag[18];
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int decrypt_ret;
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mbedtls_ccm_init( &ctx );
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ASSERT_ALLOC_WEAK( add, add_len );
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memset( key, 0, sizeof( key ) );
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memset( msg, 0, sizeof( msg ) );
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memset( iv, 0, sizeof( iv ) );
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memset( out, 0, sizeof( out ) );
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memset( tag, 0, sizeof( tag ) );
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TEST_ASSERT( mbedtls_ccm_setkey( &ctx, MBEDTLS_CIPHER_ID_AES,
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key, 8 * sizeof( key ) ) == 0 );
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TEST_ASSERT( mbedtls_ccm_encrypt_and_tag( &ctx, msg_len, iv, iv_len, add, add_len,
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msg, out, tag, tag_len ) == res );
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decrypt_ret = mbedtls_ccm_auth_decrypt( &ctx, msg_len, iv, iv_len, add, add_len,
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msg, out, tag, tag_len );
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if( res == 0 )
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TEST_ASSERT( decrypt_ret == MBEDTLS_ERR_CCM_AUTH_FAILED );
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else
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TEST_ASSERT( decrypt_ret == res );
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exit:
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mbedtls_free( add );
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mbedtls_ccm_free( &ctx );
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}
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/* END_CASE */
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/* BEGIN_CASE depends_on:MBEDTLS_AES_C */
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void ccm_star_lengths( int msg_len, int iv_len, int add_len, int tag_len,
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int res )
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{
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mbedtls_ccm_context ctx;
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unsigned char key[16];
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unsigned char msg[10];
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unsigned char iv[14];
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unsigned char add[10];
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unsigned char out[10];
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unsigned char tag[18];
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int decrypt_ret;
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mbedtls_ccm_init( &ctx );
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memset( key, 0, sizeof( key ) );
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memset( msg, 0, sizeof( msg ) );
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memset( iv, 0, sizeof( iv ) );
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memset( add, 0, sizeof( add ) );
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memset( out, 0, sizeof( out ) );
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memset( tag, 0, sizeof( tag ) );
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TEST_ASSERT( mbedtls_ccm_setkey( &ctx, MBEDTLS_CIPHER_ID_AES,
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key, 8 * sizeof( key ) ) == 0 );
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TEST_ASSERT( mbedtls_ccm_star_encrypt_and_tag( &ctx, msg_len, iv, iv_len,
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add, add_len, msg, out, tag, tag_len ) == res );
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decrypt_ret = mbedtls_ccm_star_auth_decrypt( &ctx, msg_len, iv, iv_len, add,
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add_len, msg, out, tag, tag_len );
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if( res == 0 && tag_len != 0 )
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TEST_ASSERT( decrypt_ret == MBEDTLS_ERR_CCM_AUTH_FAILED );
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else
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TEST_ASSERT( decrypt_ret == res );
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exit:
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mbedtls_ccm_free( &ctx );
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void mbedtls_ccm_encrypt_and_tag( int cipher_id, data_t * key,
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data_t * msg, data_t * iv,
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data_t * add, data_t * result )
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{
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mbedtls_ccm_context ctx;
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size_t tag_len;
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uint8_t * msg_n_tag = (uint8_t *)malloc( result->len + 2 );
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mbedtls_ccm_init( &ctx );
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memset( msg_n_tag, 0, result->len + 2 );
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memcpy( msg_n_tag, msg->x, msg->len );
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tag_len = result->len - msg->len;
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TEST_ASSERT( mbedtls_ccm_setkey( &ctx, cipher_id, key->x, key->len * 8 ) == 0 );
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/* Test with input == output */
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TEST_ASSERT( mbedtls_ccm_encrypt_and_tag( &ctx, msg->len, iv->x, iv->len, add->x, add->len,
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msg_n_tag, msg_n_tag, msg_n_tag + msg->len, tag_len ) == 0 );
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TEST_ASSERT( memcmp( msg_n_tag, result->x, result->len ) == 0 );
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/* Check we didn't write past the end */
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TEST_ASSERT( msg_n_tag[result->len] == 0 && msg_n_tag[result->len + 1] == 0 );
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exit:
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mbedtls_ccm_free( &ctx );
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free( msg_n_tag );
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void mbedtls_ccm_auth_decrypt( int cipher_id, data_t * key,
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data_t * msg, data_t * iv,
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data_t * add, int tag_len, int result,
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data_t * expected_msg )
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{
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unsigned char tag[16];
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mbedtls_ccm_context ctx;
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mbedtls_ccm_init( &ctx );
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memset( tag, 0x00, sizeof( tag ) );
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msg->len -= tag_len;
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memcpy( tag, msg->x + msg->len, tag_len );
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TEST_ASSERT( mbedtls_ccm_setkey( &ctx, cipher_id, key->x, key->len * 8 ) == 0 );
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/* Test with input == output */
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TEST_ASSERT( mbedtls_ccm_auth_decrypt( &ctx, msg->len, iv->x, iv->len, add->x, add->len,
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msg->x, msg->x, msg->x + msg->len, tag_len ) == result );
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if( result == 0 )
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{
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TEST_ASSERT( memcmp( msg->x, expected_msg->x, expected_msg->len ) == 0 );
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}
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else
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{
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size_t i;
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for( i = 0; i < msg->len; i++ )
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TEST_ASSERT( msg->x[i] == 0 );
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}
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/* Check we didn't write past the end (where the original tag is) */
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TEST_ASSERT( memcmp( msg->x + msg->len, tag, tag_len ) == 0 );
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exit:
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mbedtls_ccm_free( &ctx );
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void mbedtls_ccm_star_encrypt_and_tag( int cipher_id,
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data_t *key, data_t *msg,
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data_t *source_address, data_t *frame_counter,
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int sec_level, data_t *add,
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data_t *expected_result, int output_ret )
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{
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unsigned char iv[13];
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unsigned char result[50];
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mbedtls_ccm_context ctx;
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size_t iv_len, tag_len;
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int ret;
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mbedtls_ccm_init( &ctx );
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memset( result, 0x00, sizeof( result ) );
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if( sec_level % 4 == 0)
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tag_len = 0;
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else
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tag_len = 1 << ( sec_level % 4 + 1);
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TEST_ASSERT( source_address->len == 8 );
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TEST_ASSERT( frame_counter->len == 4 );
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memcpy( iv, source_address->x, source_address->len );
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memcpy( iv + source_address->len, frame_counter->x, frame_counter->len );
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iv[source_address->len + frame_counter->len] = sec_level;
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iv_len = sizeof( iv );
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TEST_ASSERT( mbedtls_ccm_setkey( &ctx, cipher_id,
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key->x, key->len * 8 ) == 0 );
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ret = mbedtls_ccm_star_encrypt_and_tag( &ctx, msg->len, iv, iv_len,
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add->x, add->len, msg->x,
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result, result + msg->len, tag_len );
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TEST_ASSERT( ret == output_ret );
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TEST_ASSERT( memcmp( result,
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expected_result->x, expected_result->len ) == 0 );
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/* Check we didn't write past the end */
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TEST_ASSERT( result[expected_result->len] == 0 &&
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result[expected_result->len + 1] == 0 );
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exit:
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mbedtls_ccm_free( &ctx );
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void mbedtls_ccm_star_auth_decrypt( int cipher_id,
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data_t *key, data_t *msg,
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data_t *source_address, data_t *frame_counter,
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int sec_level, data_t *add,
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data_t *expected_result, int output_ret )
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{
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unsigned char iv[13];
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unsigned char result[50];
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mbedtls_ccm_context ctx;
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size_t iv_len, tag_len;
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int ret;
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mbedtls_ccm_init( &ctx );
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memset( iv, 0x00, sizeof( iv ) );
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memset( result, '+', sizeof( result ) );
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if( sec_level % 4 == 0)
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tag_len = 0;
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else
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tag_len = 1 << ( sec_level % 4 + 1);
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TEST_ASSERT( source_address->len == 8 );
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TEST_ASSERT( frame_counter->len == 4 );
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memcpy( iv, source_address->x, source_address->len );
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memcpy( iv + source_address->len, frame_counter->x, frame_counter->len );
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iv[source_address->len + frame_counter->len] = sec_level;
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iv_len = sizeof( iv );
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TEST_ASSERT( mbedtls_ccm_setkey( &ctx, cipher_id, key->x, key->len * 8 ) == 0 );
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ret = mbedtls_ccm_star_auth_decrypt( &ctx, msg->len - tag_len, iv, iv_len,
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add->x, add->len, msg->x, result,
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msg->x + msg->len - tag_len, tag_len );
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TEST_ASSERT( ret == output_ret );
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TEST_ASSERT( memcmp( result, expected_result->x,
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expected_result->len ) == 0 );
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/* Check we didn't write past the end (where the original tag is) */
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TEST_ASSERT( ( msg->len + 2 ) <= sizeof( result ) );
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TEST_EQUAL( result[msg->len], '+' );
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TEST_EQUAL( result[msg->len + 1], '+' );
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exit:
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mbedtls_ccm_free( &ctx );
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}
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/* END_CASE */
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/* BEGIN_CASE depends_on:MBEDTLS_CHECK_PARAMS:!MBEDTLS_PARAM_FAILED_ALT */
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void ccm_invalid_param( )
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{
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struct mbedtls_ccm_context ctx;
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unsigned char valid_buffer[] = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06 };
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mbedtls_cipher_id_t valid_cipher = MBEDTLS_CIPHER_ID_AES;
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int valid_len = sizeof(valid_buffer);
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int valid_bitlen = valid_len * 8;
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mbedtls_ccm_init( &ctx );
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/* mbedtls_ccm_init() */
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TEST_INVALID_PARAM( mbedtls_ccm_init( NULL ) );
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/* mbedtls_ccm_setkey() */
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_CCM_BAD_INPUT,
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mbedtls_ccm_setkey( NULL, valid_cipher, valid_buffer, valid_bitlen ) );
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_CCM_BAD_INPUT,
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mbedtls_ccm_setkey( &ctx, valid_cipher, NULL, valid_bitlen ) );
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/* mbedtls_ccm_encrypt_and_tag() */
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_CCM_BAD_INPUT,
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mbedtls_ccm_encrypt_and_tag( NULL, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_buffer,
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valid_buffer, valid_len ) );
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_CCM_BAD_INPUT,
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mbedtls_ccm_encrypt_and_tag( &ctx, valid_len,
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NULL, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_buffer,
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valid_buffer, valid_len ) );
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_CCM_BAD_INPUT,
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mbedtls_ccm_encrypt_and_tag( &ctx, valid_len,
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valid_buffer, valid_len,
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NULL, valid_len,
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valid_buffer, valid_buffer,
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valid_buffer, valid_len ) );
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_CCM_BAD_INPUT,
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mbedtls_ccm_encrypt_and_tag( &ctx, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_len,
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NULL, valid_buffer,
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valid_buffer, valid_len ) );
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_CCM_BAD_INPUT,
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mbedtls_ccm_encrypt_and_tag( &ctx, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_len,
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valid_buffer, NULL,
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valid_buffer, valid_len ) );
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_CCM_BAD_INPUT,
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mbedtls_ccm_encrypt_and_tag( &ctx, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_buffer,
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NULL, valid_len ) );
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/* mbedtls_ccm_star_encrypt_and_tag() */
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_CCM_BAD_INPUT,
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mbedtls_ccm_star_encrypt_and_tag( NULL, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_buffer,
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valid_buffer, valid_len) );
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_CCM_BAD_INPUT,
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mbedtls_ccm_star_encrypt_and_tag( &ctx, valid_len,
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NULL, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_buffer,
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valid_buffer, valid_len ) );
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_CCM_BAD_INPUT,
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mbedtls_ccm_star_encrypt_and_tag( &ctx, valid_len,
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valid_buffer, valid_len,
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NULL, valid_len,
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valid_buffer, valid_buffer,
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valid_buffer, valid_len ) );
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_CCM_BAD_INPUT,
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mbedtls_ccm_star_encrypt_and_tag( &ctx, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_len,
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NULL, valid_buffer,
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valid_buffer, valid_len ) );
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_CCM_BAD_INPUT,
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mbedtls_ccm_star_encrypt_and_tag( &ctx, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_len,
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valid_buffer, NULL,
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valid_buffer, valid_len ) );
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_CCM_BAD_INPUT,
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mbedtls_ccm_star_encrypt_and_tag( &ctx, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_buffer,
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NULL, valid_len ) );
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/* mbedtls_ccm_auth_decrypt() */
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_CCM_BAD_INPUT,
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mbedtls_ccm_auth_decrypt( NULL, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_buffer,
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valid_buffer, valid_len ) );
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_CCM_BAD_INPUT,
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mbedtls_ccm_auth_decrypt( &ctx, valid_len,
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NULL, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_buffer,
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valid_buffer, valid_len ) );
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_CCM_BAD_INPUT,
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mbedtls_ccm_auth_decrypt( &ctx, valid_len,
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valid_buffer, valid_len,
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NULL, valid_len,
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valid_buffer, valid_buffer,
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valid_buffer, valid_len ) );
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_CCM_BAD_INPUT,
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mbedtls_ccm_auth_decrypt( &ctx, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_len,
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NULL, valid_buffer,
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valid_buffer, valid_len ) );
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_CCM_BAD_INPUT,
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mbedtls_ccm_auth_decrypt( &ctx, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_len,
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valid_buffer, NULL,
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valid_buffer, valid_len ) );
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_CCM_BAD_INPUT,
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mbedtls_ccm_auth_decrypt( &ctx, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_buffer,
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NULL, valid_len ) );
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/* mbedtls_ccm_star_auth_decrypt() */
|
|
TEST_INVALID_PARAM_RET(
|
|
MBEDTLS_ERR_CCM_BAD_INPUT,
|
|
mbedtls_ccm_star_auth_decrypt( NULL, valid_len,
|
|
valid_buffer, valid_len,
|
|
valid_buffer, valid_len,
|
|
valid_buffer, valid_buffer,
|
|
valid_buffer, valid_len ) );
|
|
TEST_INVALID_PARAM_RET(
|
|
MBEDTLS_ERR_CCM_BAD_INPUT,
|
|
mbedtls_ccm_star_auth_decrypt( &ctx, valid_len,
|
|
NULL, valid_len,
|
|
valid_buffer, valid_len,
|
|
valid_buffer, valid_buffer,
|
|
valid_buffer, valid_len ) );
|
|
TEST_INVALID_PARAM_RET(
|
|
MBEDTLS_ERR_CCM_BAD_INPUT,
|
|
mbedtls_ccm_star_auth_decrypt( &ctx, valid_len,
|
|
valid_buffer, valid_len,
|
|
NULL, valid_len,
|
|
valid_buffer, valid_buffer,
|
|
valid_buffer, valid_len ) );
|
|
TEST_INVALID_PARAM_RET(
|
|
MBEDTLS_ERR_CCM_BAD_INPUT,
|
|
mbedtls_ccm_star_auth_decrypt( &ctx, valid_len,
|
|
valid_buffer, valid_len,
|
|
valid_buffer, valid_len,
|
|
NULL, valid_buffer,
|
|
valid_buffer, valid_len ) );
|
|
TEST_INVALID_PARAM_RET(
|
|
MBEDTLS_ERR_CCM_BAD_INPUT,
|
|
mbedtls_ccm_star_auth_decrypt( &ctx, valid_len,
|
|
valid_buffer, valid_len,
|
|
valid_buffer, valid_len,
|
|
valid_buffer, NULL,
|
|
valid_buffer, valid_len ) );
|
|
TEST_INVALID_PARAM_RET(
|
|
MBEDTLS_ERR_CCM_BAD_INPUT,
|
|
mbedtls_ccm_star_auth_decrypt( &ctx, valid_len,
|
|
valid_buffer, valid_len,
|
|
valid_buffer, valid_len,
|
|
valid_buffer, valid_buffer,
|
|
NULL, valid_len ) );
|
|
|
|
exit:
|
|
mbedtls_ccm_free( &ctx );
|
|
return;
|
|
}
|
|
/* END_CASE */
|
|
|
|
/* BEGIN_CASE */
|
|
void ccm_valid_param( )
|
|
{
|
|
TEST_VALID_PARAM( mbedtls_ccm_free( NULL ) );
|
|
exit:
|
|
return;
|
|
}
|
|
/* END_CASE */
|