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Split multipart AEAD contexts into two parts

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Split to data required for internal implementation and data required for
driver implementation with data left over for the PSA layer.

Signed-off-by: Paul Elliott <paul.elliott@arm.com>
This commit is contained in:
Paul Elliott 2021-05-10 18:19:46 +01:00
parent 2df40057b3
commit cbbde5f28c
8 changed files with 321 additions and 183 deletions
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43
include/psa/crypto_struct.h
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@ -153,8 +153,6 @@ static inline struct psa_mac_operation_s psa_mac_operation_init( void )
struct psa_aead_operation_s
{
psa_algorithm_t alg;
psa_key_type_t key_type;
/** Unique ID indicating which driver got assigned to do the
* operation. Since driver contexts are driver-specific, swapping
@ -164,50 +162,19 @@ struct psa_aead_operation_s
* any driver (i.e. none of the driver contexts are active). */
unsigned int id;
psa_algorithm_t alg;
psa_key_type_t key_type;
unsigned int key_set : 1;
unsigned int nonce_set : 1;
unsigned int lengths_set : 1;
unsigned int is_encrypt : 1;
unsigned int ad_started : 1;
unsigned int body_started : 1;
uint8_t tag_length;
uint8_t nonce_length;
size_t ad_remaining;
size_t body_remaining;
/* Buffers for AD/data - only required until CCM gets proper multipart
support. */
uint8_t *ad_buffer;
size_t ad_length;
uint8_t *body_buffer;
size_t body_length;
uint8_t *tag_buffer;
/* buffer to store Nonce - only required until CCM and GCM get proper
multipart support. */
uint8_t nonce[PSA_AEAD_NONCE_MAX_SIZE];
union
{
unsigned dummy; /* Enable easier initializing of the union. */
#if defined(MBEDTLS_PSA_BUILTIN_ALG_CCM)
mbedtls_ccm_context ccm;
#endif /* MBEDTLS_PSA_BUILTIN_ALG_CCM */
#if defined(MBEDTLS_PSA_BUILTIN_ALG_GCM)
mbedtls_gcm_context gcm;
#endif /* MBEDTLS_PSA_BUILTIN_ALG_GCM */
#if defined(MBEDTLS_PSA_BUILTIN_ALG_CHACHA20_POLY1305)
mbedtls_chachapoly_context chachapoly;
#endif /* MBEDTLS_PSA_BUILTIN_ALG_CHACHA20_POLY1305 */
} ctx;
psa_driver_aead_context_t ctx;
};
#define PSA_AEAD_OPERATION_INIT {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, {0}, {0}}
#define PSA_AEAD_OPERATION_INIT {0, 0, 0, 0, 0, 0, 0, 0, {0}}
static inline struct psa_aead_operation_s psa_aead_operation_init( void )
{
const struct psa_aead_operation_s v = PSA_AEAD_OPERATION_INIT;