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MPS Reader Tests: Test use of accumulator

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Signed-off-by: Hanno Becker <hanno.becker@arm.com>
This commit is contained in:
Hanno Becker 2021-01-12 08:27:29 +00:00
parent caf1a3f663
commit e82952acb3
2 changed files with 141 additions and 0 deletions
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18
tests/suites/test_suite_mps.data
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@ -27,3 +27,21 @@ mbedtls_mps_reader_pausing_needed_disabled:
MPS Reader: Pausing needed + enabled, but buffer too small
mbedtls_mps_reader_pausing_needed_buffer_too_small:
MPS Reader: Pausing, repeat single call without commit
mbedtls_mps_reader_pausing:0
MPS Reader: Pausing, repeat single call with commit
mbedtls_mps_reader_pausing:1
MPS Reader: Pausing, repeat multiple calls without commit
mbedtls_mps_reader_pausing:2
MPS Reader: Pausing, repeat multiple calls with commit #0
mbedtls_mps_reader_pausing:3
MPS Reader: Pausing, repeat multiple calls with commit #1
mbedtls_mps_reader_pausing:4
MPS Reader: Pausing, repeat multiple calls with commit #2
mbedtls_mps_reader_pausing:5

123
tests/suites/test_suite_mps.function
View file

@ -269,3 +269,126 @@ void mbedtls_mps_reader_pausing_needed_buffer_too_small()
mbedtls_reader_free( &rd );
}
/* END_CASE */
/* BEGIN_CASE depends_on:TEST_SUITE_MPS_READER */
void mbedtls_mps_reader_pausing( int option )
{
/* This test exercises the behaviour of the reader when the
* accumulator is used to fufill the consumer's request.
*
* More detailed:
* - The producer feeds some data.
* - The consumer asks for more data than what's available.
* - The reader remembers the request and goes back to
* producing mode, waiting for more data from the producer.
* - The producer provides another chunk of data which is
* sufficient to fulfill the original read request.
* - The consumer retries the original read request, which
* should now succeed.
*
* This test comes in multiple variants controlled by the
* `option` parameter and documented below.
*/
unsigned char bufA[100], bufB[100];
unsigned char *tmp;
unsigned char acc[40];
mbedtls_reader rd;
for( int i=0; (unsigned) i < sizeof( bufA ); i++ )
bufA[i] = (unsigned char) i;
for( int i=0; (unsigned) i < sizeof( bufB ); i++ )
bufB[i] = ~ ((unsigned char) i);
/* Preparation (lower layer) */
mbedtls_reader_init( &rd, acc, sizeof( acc ) );
TEST_ASSERT( mbedtls_reader_feed( &rd, bufA, sizeof( bufA ) ) == 0 );
/* Consumption (upper layer) */
/* Ask for more than what's available. */
TEST_ASSERT( mbedtls_reader_get( &rd, 80, &tmp, NULL ) == 0 );
ASSERT_COMPARE( tmp, 80, bufA, 80 );
TEST_ASSERT( mbedtls_reader_commit( &rd ) == 0 );
TEST_ASSERT( mbedtls_reader_get( &rd, 10, &tmp, NULL ) == 0 );
ASSERT_COMPARE( tmp, 10, bufA + 80, 10 );
switch( option )
{
case 0: /* Single uncommitted fetch at pausing */
case 1:
TEST_ASSERT( mbedtls_reader_commit( &rd ) == 0 );
break;
default: /* Multiple uncommitted fetches at pausing */
break;
}
TEST_ASSERT( mbedtls_reader_get( &rd, 20, &tmp, NULL ) ==
MBEDTLS_ERR_MPS_READER_OUT_OF_DATA );
/* Preparation */
TEST_ASSERT( mbedtls_reader_reclaim( &rd, NULL ) == 0 );
TEST_ASSERT( mbedtls_reader_feed( &rd, bufB, sizeof( bufB ) ) == 0 );
/* Consumption */
switch( option )
{
case 0: /* Single fetch at pausing, re-fetch with commit. */
TEST_ASSERT( mbedtls_reader_get( &rd, 20, &tmp, NULL ) == 0 );
ASSERT_COMPARE( tmp, 10, bufA + 90, 10 );
ASSERT_COMPARE( tmp + 10, 10, bufB, 10 );
TEST_ASSERT( mbedtls_reader_commit( &rd ) == 0 );
break;
case 1: /* Single fetch at pausing, re-fetch without commit. */
TEST_ASSERT( mbedtls_reader_get( &rd, 20, &tmp, NULL ) == 0 );
ASSERT_COMPARE( tmp, 10, bufA + 90, 10 );
ASSERT_COMPARE( tmp + 10, 10, bufB, 10 );
break;
case 2: /* Multiple fetches at pausing, repeat without commit. */
TEST_ASSERT( mbedtls_reader_get( &rd, 10, &tmp, NULL ) == 0 );
ASSERT_COMPARE( tmp, 10, bufA + 80, 10 );
TEST_ASSERT( mbedtls_reader_get( &rd, 20, &tmp, NULL ) == 0 );
ASSERT_COMPARE( tmp, 10, bufA + 90, 10 );
ASSERT_COMPARE( tmp + 10, 10, bufB, 10 );
break;
case 3: /* Multiple fetches at pausing, repeat with commit 1. */
TEST_ASSERT( mbedtls_reader_get( &rd, 10, &tmp, NULL ) == 0 );
ASSERT_COMPARE( tmp, 10, bufA + 80, 10 );
TEST_ASSERT( mbedtls_reader_commit( &rd ) == 0 );
TEST_ASSERT( mbedtls_reader_get( &rd, 20, &tmp, NULL ) == 0 );
ASSERT_COMPARE( tmp, 10, bufA + 90, 10 );
ASSERT_COMPARE( tmp + 10, 10, bufB, 10 );
break;
case 4: /* Multiple fetches at pausing, repeat with commit 2. */
TEST_ASSERT( mbedtls_reader_get( &rd, 10, &tmp, NULL ) == 0 );
ASSERT_COMPARE( tmp, 10, bufA + 80, 10 );
TEST_ASSERT( mbedtls_reader_get( &rd, 20, &tmp, NULL ) == 0 );
ASSERT_COMPARE( tmp, 10, bufA + 90, 10 );
ASSERT_COMPARE( tmp + 10, 10, bufB, 10 );
TEST_ASSERT( mbedtls_reader_commit( &rd ) == 0 );
break;
case 5: /* Multiple fetches at pausing, repeat with commit 3. */
TEST_ASSERT( mbedtls_reader_get( &rd, 10, &tmp, NULL ) == 0 );
ASSERT_COMPARE( tmp, 10, bufA + 80, 10 );
TEST_ASSERT( mbedtls_reader_commit( &rd ) == 0 );
TEST_ASSERT( mbedtls_reader_get( &rd, 20, &tmp, NULL ) == 0 );
ASSERT_COMPARE( tmp, 10, bufA + 90, 10 );
ASSERT_COMPARE( tmp + 10, 10, bufB, 10 );
TEST_ASSERT( mbedtls_reader_commit( &rd ) == 0 );
break;
default:
TEST_ASSERT( 0 );
}
/* In all cases, fetch the rest of the second buffer. */
TEST_ASSERT( mbedtls_reader_get( &rd, 90, &tmp, NULL ) == 0 );
ASSERT_COMPARE( tmp, 90, bufB + 10, 90 );
TEST_ASSERT( mbedtls_reader_commit( &rd ) == 0 );
/* Wrapup */
TEST_ASSERT( mbedtls_reader_reclaim( &rd, NULL ) == 0 );
mbedtls_reader_free( &rd );
}
/* END_CASE */