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psa: cipher: Dispatch based on driver identifier

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For cipher multi-part operations, dispatch based on
the driver identifier even in the case of the
Mbed TLS software implementation (viewed as a driver).
Also use the driver identifier to check that an
cipher operation context is active or not.

This aligns the way hash and cipher multi-part
operations are dispatched.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
This commit is contained in:
Ronald Cron 2021-03-10 08:34:23 +01:00
parent 06aa442bef
commit 49fafa98b1
4 changed files with 88 additions and 99 deletions
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14
include/psa/crypto_struct.h
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@ -73,11 +73,6 @@ extern "C" {
#include "psa/crypto_driver_contexts.h"
typedef struct {
/** Unique ID indicating which driver got assigned to do the
* operation. Since driver contexts are driver-specific, swapping
* drivers halfway through the operation is not supported.
* ID values are auto-generated in psa_driver_wrappers.h */
unsigned int id;
/** Context structure for the assigned driver, when id is not zero. */
void* ctx;
} psa_operation_driver_context_t;
@ -143,10 +138,17 @@ static inline struct psa_mac_operation_s psa_mac_operation_init( void )
struct psa_cipher_operation_s
{
/** Unique ID indicating which driver got assigned to do the
* operation. Since driver contexts are driver-specific, swapping
* drivers halfway through the operation is not supported.
* ID values are auto-generated in psa_crypto_driver_wrappers.h
* ID value zero means the context is not valid or not assigned to
* any driver (i.e. none of the driver contexts are active). */
unsigned int id;
psa_algorithm_t alg;
unsigned int iv_required : 1;
unsigned int iv_set : 1;
unsigned int mbedtls_in_use : 1; /* Indicates mbed TLS is handling the operation. */
uint8_t iv_size;
uint8_t block_size;
union