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Don't call TEST_ASSERT in PSA_DONE

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TEST_ASSERT jumps to the exit label, so it must not be called from
cleanup code executed after the exit label. It's legitimate (and
indeed very common) to call PSA_DONE in cleanup code, so PSA_DONE must
not jump to exit.

Define an auxiliary function test_fail_if_psa_leaking() that calls
test_fail() with the error message provided by
mbedtls_test_helper_is_psa_leaking(). This function currently needs to
be in helpers.function rather than in a PSA-specific helper file
because it calls test_fail which is defined in helpers.function.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine 2021-01-06 20:47:16 +01:00
parent 6beb327a5e
commit c85c20147b
2 changed files with 40 additions and 10 deletions
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30
tests/include/test/psa_crypto_helpers.h
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@ -36,19 +36,29 @@
const char *mbedtls_test_helper_is_psa_leaking( void );
/** Check that no PSA Crypto key slots are in use.
*
* If any slots are in use, mark the current test as failed and jump to
* the exit label. This is equivalent to
* `TEST_ASSERT( ! mbedtls_test_helper_is_psa_leaking( ) )`
* but with a more informative message.
*/
#define ASSERT_PSA_PRISTINE( ) \
TEST_ASSERT( ! mbedtls_test_helper_is_psa_leaking( ) )
#define ASSERT_PSA_PRISTINE( ) \
do \
{ \
if( test_fail_if_psa_leaking( __LINE__, __FILE__ ) ) \
goto exit; \
} \
while( 0 )
/** Shut down the PSA Crypto subsystem. Expect a clean shutdown, with no slots
* in use.
*/
#define PSA_DONE( ) \
do \
{ \
ASSERT_PSA_PRISTINE( ); \
mbedtls_psa_crypto_free( ); \
} \
#define PSA_DONE( ) \
do \
{ \
test_fail_if_psa_leaking( __LINE__, __FILE__ ); \
mbedtls_psa_crypto_free( ); \
} \
while( 0 )
@ -60,8 +70,8 @@ const char *mbedtls_test_helper_is_psa_leaking( void );
* disabled by default.
*
* When MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG is enabled and the test
* helpers are linked into a program, you must enable this before any code
* that uses the PSA subsystem to generate random data (including internal
* helpers are linked into a program, you must enable this before running any
* code that uses the PSA subsystem to generate random data (including internal
* random generation for purposes such as blinding when the random generation
* is routed through PSA).
*