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Prepare codepath tests for early termination

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Signed-off-by: Janos Follath <janos.follath@arm.com>
This commit is contained in:
Janos Follath
2024-08-22 20:00:23 +01:00
committed by Manuel Pégourié-Gonnard
parent e9cc10d2af
commit 0a75adcf4e
3 changed files with 52 additions and 9 deletions
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43
tests/include/test/bignum_codepath_check.h
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@ -43,6 +43,49 @@ static inline void mbedtls_codepath_reset(void)
mbedtls_codepath_check = MBEDTLS_MPI_IS_TEST;
}
/** Check the codepath taken and fail if it doesn't match.
*
* When a function returns with an error, it can do so before reaching any interesting codepath. The
* same can happen if a parameter to the function is zero. In these cases we need to allow
* uninitialised value for the codepath tracking variable.
*
* This macro expands to an instruction, not an expression.
* It may jump to the \c exit label.
*
* \param path The expected codepath.
* This expression may be evaluated multiple times.
* \param ret The expected return value.
* \param E The MPI parameter that can cause shortcuts.
*/
#define ASSERT_BIGNUM_CODEPATH(path, ret, E) \
do { \
if((ret)!=0 || (E).n == 0) \
TEST_ASSERT(mbedtls_codepath_check == (path) || \
mbedtls_codepath_check == MBEDTLS_MPI_IS_TEST); \
else \
TEST_EQUAL(mbedtls_codepath_check, (path)); \
} while (0)
/** Check the codepath taken and fail if it doesn't match.
*
* When a function returns with an error, it can do so before reaching any interesting codepath. In
* this case we need to allow uninitialised value for the codepath tracking variable.
*
* This macro expands to an instruction, not an expression.
* It may jump to the \c exit label.
*
* \param path The expected codepath.
* This expression may be evaluated multiple times.
* \param ret The expected return value.
*/
#define ASSERT_RSA_CODEPATH(path, ret) \
do { \
if((ret)!=0) \
TEST_ASSERT(mbedtls_codepath_check == (path) || \
mbedtls_codepath_check == MBEDTLS_MPI_IS_TEST); \
else \
TEST_EQUAL(mbedtls_codepath_check, (path)); \
} while (0)
#endif /* MBEDTLS_TEST_HOOKS && !MBEDTLS_THREADING_C */
#endif /* BIGNUM_CODEPATH_CHECK_H */