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Use enum for slot state in PSA-based cipher context

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This commit is contained in:
Hanno Becker
2018-11-17 22:11:16 +00:00
parent 8d88a6e20d
commit ce61a32e6a
2 changed files with 21 additions and 7 deletions
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20
include/mbedtls/cipher_internal.h
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@ -119,14 +119,26 @@ typedef struct
} mbedtls_cipher_definition_t;
#if defined(MBEDTLS_USE_PSA_CRYPTO)
typedef enum
{
MBEDTLS_CIPHER_PSA_KEY_UNSET = 0,
MBEDTLS_CIPHER_PSA_KEY_OWNED, /* Used for PSA-based cipher contexts
* which use raw key material internally
* imported into a freshly allocated key slot,
* and which hence need to destroy that key
* slot when they are no longer needed. */
MBEDTLS_CIPHER_PSA_KEY_NOT_OWNED, /* Used for PSA-based cipher contexts
* which use a key from a key slot
* provided by the user, and which hence
* should not be destroyed when the
* context is no longer needed. */
} mbedtls_cipher_psa_key_ownership;
typedef struct
{
psa_algorithm_t alg;
psa_key_slot_t slot;
unsigned char slot_state; /*!< 0: The slot is unset.
* 1: The slot is set and we own it.
* 2: The slot is set but we don't own it. */
mbedtls_cipher_psa_key_ownership slot_state;
} mbedtls_cipher_context_psa;
#endif /* MBEDTLS_USE_PSA_CRYPTO */