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Add init-free tests for entropy

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These tests validate that an entropy object can be reused and that
calling mbedtls_entropy_free() twice is ok.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine 2021-02-22 21:24:02 +01:00
parent 6855d1a457
commit 210a0168d5
2 changed files with 28 additions and 0 deletions
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6
tests/suites/test_suite_entropy.data
View file

@ -1,3 +1,9 @@
Entropy init-free-free
entropy_init_free:0
Entropy init-free-init-free
entropy_init_free:1
Create NV seed_file
nv_seed_file_create:

22
tests/suites/test_suite_entropy.function
View file

@ -125,6 +125,28 @@ int read_nv_seed( unsigned char *buf, size_t buf_len )
* END_DEPENDENCIES
*/
/* BEGIN_CASE */
void entropy_init_free( int reinit )
{
mbedtls_entropy_context ctx;
/* Double free is not explicitly documented to work, but it is convenient
* to call mbedtls_entropy_free() unconditionally on an error path without
* checking whether it has already been called in the success path. */
mbedtls_entropy_init( &ctx );
mbedtls_entropy_free( &ctx );
if( reinit )
mbedtls_entropy_init( &ctx );
mbedtls_entropy_free( &ctx );
/* This test case always succeeds, functionally speaking. A plausible
* bug might trigger an invalid pointer dereference or a memory leak. */
goto exit;
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_ENTROPY_NV_SEED:MBEDTLS_FS_IO */
void entropy_seed_file( char * path, int ret )
{