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psa: Add initializers for MAC operation objects

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Add new initializers for MAC operation objects and use them in our tests
and library code. Prefer using the macro initializers due to their
straightforwardness.
This commit is contained in:
Jaeden Amero 2019-01-04 11:48:03 +00:00 • committed by Jaeden Amero
parent 6a25b41ac3
commit 769ce27f12
4 changed files with 91 additions and 9 deletions
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55
include/psa/crypto.h
View file

@ -928,12 +928,51 @@ psa_status_t psa_hash_abort(psa_hash_operation_t *operation);
*/
/** The type of the state data structure for multipart MAC operations.
*
* Before calling any function on a MAC operation object, the application must
* initialize it by any of the following means:
* - Set the structure to all-bits-zero, for example:
* \code
* psa_mac_operation_t operation;
* memset(&operation, 0, sizeof(operation));
* \endcode
* - Initialize the structure to logical zero values, for example:
* \code
* psa_mac_operation_t operation = {0};
* \endcode
* - Initialize the structure to the initializer #PSA_MAC_OPERATION_INIT,
* for example:
* \code
* psa_mac_operation_t operation = PSA_MAC_OPERATION_INIT;
* \endcode
* - Assign the result of the function psa_mac_operation_init()
* to the structure, for example:
* \code
* psa_mac_operation_t operation;
* operation = psa_mac_operation_init();
* \endcode
*
* This is an implementation-defined \c struct. Applications should not
* make any assumptions about the content of this structure except
* as directed by the documentation of a specific implementation. */
typedef struct psa_mac_operation_s psa_mac_operation_t;
/** \def PSA_MAC_OPERATION_INIT
*
* This macro returns a suitable initializer for a MAC operation object of type
* #psa_mac_operation_t.
*/
#ifdef __DOXYGEN_ONLY__
/* This is an example definition for documentation purposes.
* Implementations should define a suitable value in `crypto_struct.h`.
*/
#define PSA_MAC_OPERATION_INIT {0}
#endif
/** Return an initial value for a MAC operation object.
*/
static psa_mac_operation_t psa_mac_operation_init(void);
/** Start a multipart MAC calculation operation.
*
* This function sets up the calculation of the MAC
@ -944,6 +983,8 @@ typedef struct psa_mac_operation_s psa_mac_operation_t;
* The sequence of operations to calculate a MAC is as follows:
* -# Allocate an operation object which will be passed to all the functions
* listed here.
* -# Initialize the operation object with one of the methods described in the
* documentation for #psa_mac_operation_t, e.g. PSA_MAC_OPERATION_INIT.
* -# Call psa_mac_sign_setup() to specify the algorithm and key.
* The key remains associated with the operation even if the content
* of the key slot changes.
@ -954,14 +995,16 @@ typedef struct psa_mac_operation_s psa_mac_operation_t;
* calculating the MAC value and retrieve it.
*
* The application may call psa_mac_abort() at any time after the operation
* has been initialized with psa_mac_sign_setup().
* has been initialized.
*
* After a successful call to psa_mac_sign_setup(), the application must
* eventually terminate the operation through one of the following methods:
* - A failed call to psa_mac_update().
* - A call to psa_mac_sign_finish() or psa_mac_abort().
*
* \param[out] operation The operation object to use.
* \param[in,out] operation The operation object to set up. It must have
* been initialized as per the documentation for
* #psa_mac_operation_t and not yet in use.
* \param handle Handle to the key to use for the operation.
* \param alg The MAC algorithm to compute (\c PSA_ALG_XXX value
* such that #PSA_ALG_IS_MAC(alg) is true).
@ -996,6 +1039,8 @@ psa_status_t psa_mac_sign_setup(psa_mac_operation_t *operation,
* The sequence of operations to verify a MAC is as follows:
* -# Allocate an operation object which will be passed to all the functions
* listed here.
* -# Initialize the operation object with one of the methods described in the
* documentation for #psa_mac_operation_t, e.g. PSA_MAC_OPERATION_INIT.
* -# Call psa_mac_verify_setup() to specify the algorithm and key.
* The key remains associated with the operation even if the content
* of the key slot changes.
@ -1007,14 +1052,16 @@ psa_status_t psa_mac_sign_setup(psa_mac_operation_t *operation,
* the expected value.
*
* The application may call psa_mac_abort() at any time after the operation
* has been initialized with psa_mac_verify_setup().
* has been initialized.
*
* After a successful call to psa_mac_verify_setup(), the application must
* eventually terminate the operation through one of the following methods:
* - A failed call to psa_mac_update().
* - A call to psa_mac_verify_finish() or psa_mac_abort().
*
* \param[out] operation The operation object to use.
* \param[in,out] operation The operation object to set up. It must have
* been initialized as per the documentation for
* #psa_mac_operation_t and not yet in use.
* \param handle Handle to the key to use for the operation.
* \param alg The MAC algorithm to compute (\c PSA_ALG_XXX value
* such that #PSA_ALG_IS_MAC(\p alg) is true).

7
include/psa/crypto_struct.h
View file

@ -123,6 +123,13 @@ struct psa_mac_operation_s
} ctx;
};
#define PSA_MAC_OPERATION_INIT {0, 0, 0, 0, 0, 0, 0, {0}}
static inline struct psa_mac_operation_s psa_mac_operation_init( void )
{
const struct psa_mac_operation_s v = PSA_MAC_OPERATION_INIT;
return( v );
}
struct psa_cipher_operation_s
{
psa_algorithm_t alg;