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Make sure to not call mbedtls_cipher_free on an uninitialised context

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As pointed out by Gilles

Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>
This commit is contained in:
Steven Cooreman 2020-09-09 18:41:07 +02:00
parent b5e52f2e31
commit e55f3e8de4
1 changed files with 9 additions and 3 deletions
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12
library/psa_crypto.c
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@ -4101,12 +4101,18 @@ static psa_status_t psa_cipher_setup( psa_cipher_operation_t *operation,
slot,
alg );
if( status == PSA_SUCCESS )
operation->accelerator_set = 1;
if( status != PSA_ERROR_NOT_SUPPORTED ||
psa_key_lifetime_is_external( slot->attr.lifetime ) )
{
/* Indicate this operation is bound to an accelerator. When the driver
* setup succeeded, this indicates to the core to not call any mbedtls_
* functions for this operation (contexts are not interoperable).
* In case the drivers couldn't setup and there's no way to fallback,
* indicate to the core to not call mbedtls_cipher_free on an
* uninitialised mbed TLS cipher context. */
operation->accelerator_set = 1;
goto exit;
}
/* Proceed with initializing mbed TLS cipher context if no accelerator is
* available for the given algorithm & key. */