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Get rid of flags in attributes

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The `flags` field in `psa_key_attributes_t` was a general mechanism that
only ever got used for a single flag: to indicate that the `slot_number`
field has been set. We have switched to a dedicated indicator for that, so
we can now remove `flags`.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine
2024-02-28 01:56:16 +01:00
parent 972539c241
commit e92796ef98
3 changed files with 1 additions and 105 deletions
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26
include/psa/crypto_struct.h
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@ -266,29 +266,6 @@ typedef uint16_t psa_key_bits_t;
* conditionals. */
#define PSA_MAX_KEY_BITS 0xfff8
/** A mask of flags that can be stored in key attributes.
*
* This type is also used internally to store flags in slots. Internal
* flags are defined in library/psa_crypto_core.h. Internal flags may have
* the same value as external flags if they are properly handled during
* key creation and in psa_get_key_attributes.
*/
typedef uint16_t psa_key_attributes_flag_t;
#define MBEDTLS_PSA_KA_FLAG_HAS_SLOT_NUMBER \
((psa_key_attributes_flag_t) 0x0001)
/* A mask of key attribute flags used externally only.
* Only meant for internal checks inside the library. */
#define MBEDTLS_PSA_KA_MASK_EXTERNAL_ONLY ( \
MBEDTLS_PSA_KA_FLAG_HAS_SLOT_NUMBER | \
0)
/* A mask of key attribute flags used both internally and externally.
* Currently there aren't any. */
#define MBEDTLS_PSA_KA_MASK_DUAL_USE ( \
0)
struct psa_key_attributes_s {
#if defined(MBEDTLS_PSA_CRYPTO_SE_C)
psa_key_slot_number_t MBEDTLS_PRIVATE(slot_number);
@ -298,7 +275,6 @@ struct psa_key_attributes_s {
psa_key_bits_t MBEDTLS_PRIVATE(bits);
psa_key_lifetime_t MBEDTLS_PRIVATE(lifetime);
psa_key_policy_t MBEDTLS_PRIVATE(policy);
psa_key_attributes_flag_t MBEDTLS_PRIVATE(flags);
/* This type has a different layout in the client view wrt the
* service view of the key id, i.e. in service view usually is
* expected to have MBEDTLS_PSA_CRYPTO_KEY_ID_ENCODES_OWNER defined
@ -321,7 +297,7 @@ struct psa_key_attributes_s {
#define PSA_KEY_ATTRIBUTES_INIT { PSA_KEY_ATTRIBUTES_MAYBE_SLOT_NUMBER \
PSA_KEY_TYPE_NONE, 0, \
PSA_KEY_LIFETIME_VOLATILE, \
PSA_KEY_POLICY_INIT, 0, \
PSA_KEY_POLICY_INIT, \
MBEDTLS_SVC_KEY_ID_INIT }
static inline struct psa_key_attributes_s psa_key_attributes_init(void)