MPS Reader Tests: Test use of accumulator
Signed-off-by: Hanno Becker <hanno.becker@arm.com>
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2 changed files with 141 additions and 0 deletions
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@ -27,3 +27,21 @@ mbedtls_mps_reader_pausing_needed_disabled:
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MPS Reader: Pausing needed + enabled, but buffer too small
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mbedtls_mps_reader_pausing_needed_buffer_too_small:
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MPS Reader: Pausing, repeat single call without commit
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mbedtls_mps_reader_pausing:0
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MPS Reader: Pausing, repeat single call with commit
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mbedtls_mps_reader_pausing:1
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MPS Reader: Pausing, repeat multiple calls without commit
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mbedtls_mps_reader_pausing:2
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MPS Reader: Pausing, repeat multiple calls with commit #0
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mbedtls_mps_reader_pausing:3
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MPS Reader: Pausing, repeat multiple calls with commit #1
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mbedtls_mps_reader_pausing:4
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MPS Reader: Pausing, repeat multiple calls with commit #2
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mbedtls_mps_reader_pausing:5
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@ -269,3 +269,126 @@ void mbedtls_mps_reader_pausing_needed_buffer_too_small()
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mbedtls_reader_free( &rd );
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}
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/* END_CASE */
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/* BEGIN_CASE depends_on:TEST_SUITE_MPS_READER */
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void mbedtls_mps_reader_pausing( int option )
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{
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/* This test exercises the behaviour of the reader when the
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* accumulator is used to fufill the consumer's request.
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*
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* More detailed:
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* - The producer feeds some data.
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* - The consumer asks for more data than what's available.
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* - The reader remembers the request and goes back to
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* producing mode, waiting for more data from the producer.
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* - The producer provides another chunk of data which is
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* sufficient to fulfill the original read request.
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* - The consumer retries the original read request, which
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* should now succeed.
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*
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* This test comes in multiple variants controlled by the
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* `option` parameter and documented below.
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*/
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unsigned char bufA[100], bufB[100];
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unsigned char *tmp;
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unsigned char acc[40];
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mbedtls_reader rd;
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for( int i=0; (unsigned) i < sizeof( bufA ); i++ )
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bufA[i] = (unsigned char) i;
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for( int i=0; (unsigned) i < sizeof( bufB ); i++ )
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bufB[i] = ~ ((unsigned char) i);
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/* Preparation (lower layer) */
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mbedtls_reader_init( &rd, acc, sizeof( acc ) );
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TEST_ASSERT( mbedtls_reader_feed( &rd, bufA, sizeof( bufA ) ) == 0 );
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/* Consumption (upper layer) */
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/* Ask for more than what's available. */
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TEST_ASSERT( mbedtls_reader_get( &rd, 80, &tmp, NULL ) == 0 );
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ASSERT_COMPARE( tmp, 80, bufA, 80 );
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TEST_ASSERT( mbedtls_reader_commit( &rd ) == 0 );
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TEST_ASSERT( mbedtls_reader_get( &rd, 10, &tmp, NULL ) == 0 );
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ASSERT_COMPARE( tmp, 10, bufA + 80, 10 );
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switch( option )
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{
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case 0: /* Single uncommitted fetch at pausing */
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case 1:
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TEST_ASSERT( mbedtls_reader_commit( &rd ) == 0 );
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break;
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default: /* Multiple uncommitted fetches at pausing */
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break;
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}
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TEST_ASSERT( mbedtls_reader_get( &rd, 20, &tmp, NULL ) ==
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MBEDTLS_ERR_MPS_READER_OUT_OF_DATA );
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/* Preparation */
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TEST_ASSERT( mbedtls_reader_reclaim( &rd, NULL ) == 0 );
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TEST_ASSERT( mbedtls_reader_feed( &rd, bufB, sizeof( bufB ) ) == 0 );
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/* Consumption */
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switch( option )
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{
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case 0: /* Single fetch at pausing, re-fetch with commit. */
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TEST_ASSERT( mbedtls_reader_get( &rd, 20, &tmp, NULL ) == 0 );
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ASSERT_COMPARE( tmp, 10, bufA + 90, 10 );
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ASSERT_COMPARE( tmp + 10, 10, bufB, 10 );
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TEST_ASSERT( mbedtls_reader_commit( &rd ) == 0 );
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break;
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case 1: /* Single fetch at pausing, re-fetch without commit. */
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TEST_ASSERT( mbedtls_reader_get( &rd, 20, &tmp, NULL ) == 0 );
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ASSERT_COMPARE( tmp, 10, bufA + 90, 10 );
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ASSERT_COMPARE( tmp + 10, 10, bufB, 10 );
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break;
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case 2: /* Multiple fetches at pausing, repeat without commit. */
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TEST_ASSERT( mbedtls_reader_get( &rd, 10, &tmp, NULL ) == 0 );
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ASSERT_COMPARE( tmp, 10, bufA + 80, 10 );
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TEST_ASSERT( mbedtls_reader_get( &rd, 20, &tmp, NULL ) == 0 );
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ASSERT_COMPARE( tmp, 10, bufA + 90, 10 );
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ASSERT_COMPARE( tmp + 10, 10, bufB, 10 );
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break;
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case 3: /* Multiple fetches at pausing, repeat with commit 1. */
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TEST_ASSERT( mbedtls_reader_get( &rd, 10, &tmp, NULL ) == 0 );
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ASSERT_COMPARE( tmp, 10, bufA + 80, 10 );
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TEST_ASSERT( mbedtls_reader_commit( &rd ) == 0 );
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TEST_ASSERT( mbedtls_reader_get( &rd, 20, &tmp, NULL ) == 0 );
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ASSERT_COMPARE( tmp, 10, bufA + 90, 10 );
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ASSERT_COMPARE( tmp + 10, 10, bufB, 10 );
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break;
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case 4: /* Multiple fetches at pausing, repeat with commit 2. */
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TEST_ASSERT( mbedtls_reader_get( &rd, 10, &tmp, NULL ) == 0 );
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ASSERT_COMPARE( tmp, 10, bufA + 80, 10 );
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TEST_ASSERT( mbedtls_reader_get( &rd, 20, &tmp, NULL ) == 0 );
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ASSERT_COMPARE( tmp, 10, bufA + 90, 10 );
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ASSERT_COMPARE( tmp + 10, 10, bufB, 10 );
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TEST_ASSERT( mbedtls_reader_commit( &rd ) == 0 );
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break;
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case 5: /* Multiple fetches at pausing, repeat with commit 3. */
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TEST_ASSERT( mbedtls_reader_get( &rd, 10, &tmp, NULL ) == 0 );
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ASSERT_COMPARE( tmp, 10, bufA + 80, 10 );
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TEST_ASSERT( mbedtls_reader_commit( &rd ) == 0 );
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TEST_ASSERT( mbedtls_reader_get( &rd, 20, &tmp, NULL ) == 0 );
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ASSERT_COMPARE( tmp, 10, bufA + 90, 10 );
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ASSERT_COMPARE( tmp + 10, 10, bufB, 10 );
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TEST_ASSERT( mbedtls_reader_commit( &rd ) == 0 );
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break;
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default:
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TEST_ASSERT( 0 );
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}
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/* In all cases, fetch the rest of the second buffer. */
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TEST_ASSERT( mbedtls_reader_get( &rd, 90, &tmp, NULL ) == 0 );
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ASSERT_COMPARE( tmp, 90, bufB + 10, 90 );
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TEST_ASSERT( mbedtls_reader_commit( &rd ) == 0 );
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/* Wrapup */
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TEST_ASSERT( mbedtls_reader_reclaim( &rd, NULL ) == 0 );
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mbedtls_reader_free( &rd );
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}
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/* END_CASE */
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