Detailed Description

PSA cryptography module: Mbed TLS structured type implementations.

Note: This file may not be included directly. Applications must include psa/crypto.h.

This file contains the definitions of some data structures with implementation-specific definitions.

In implementations with isolation between the application and the cryptography module, it is expected that the front-end and the back-end would have different versions of this file.

Design notes about multipart operation structures

For multipart operations without driver delegation support, each multipart operation structure contains a psa_algorithm_t alg field which indicates which specific algorithm the structure is for. When the structure is not in use, alg is 0. Most of the structure consists of a union which is discriminated by alg.

For multipart operations with driver delegation support, each multipart operation structure contains an unsigned int id field indicating which driver got assigned to do the operation. When the structure is not in use, 'id' is 0. The structure contains also a driver context which is the union of the contexts of all drivers able to handle the type of multipart operation.

Note that when alg or id is 0, the content of other fields is undefined. In particular, it is not guaranteed that a freshly-initialized structure is all-zero: we initialize structures to something like {0, 0}, which is only guaranteed to initializes the first member of the union; GCC and Clang initialize the whole structure to 0 (at the time of writing), but MSVC and CompCert don't.

In Mbed TLS, multipart operation structures live independently from the key. This allows Mbed TLS to free the key objects when destroying a key slot. If a multipart operation needs to remember the key after the setup function returns, the operation structure needs to contain a copy of the key.

#include <stdbool.h>
#include <stdint.h>
#include <ti/drivers/SHA2.h>
#include <ti/drivers/AESECB.h>
#include <ti/drivers/AESCCM.h>
#include <ti/drivers/AESGCM.h>
#include <ti/devices/DeviceFamily.h>
#include <ti/drivers/cryptoutils/cryptokey/CryptoKeyKeyStore_PSA.h>
#include <third_party/psa_crypto/crypto_helper.h>

Include dependency graph for crypto_struct.h:

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Go to the source code of this file.

Data Structures
struct	psa_key_policy_s

struct	psa_core_key_attributes_t

struct	psa_key_attributes_s

struct	psa_hash_operation_s

struct	psa_cipher_operation_s

struct	psa_mac_operation_s

struct	psa_aead_operation_s

struct	psa_key_derivation_s

Macros
#define	PSA_KEY_POLICY_INIT

#define	PSA_KEY_BITS_TOO_LARGE ((psa_key_bits_t)(-1))

#define	PSA_MAX_KEY_BITS 0xfff8

#define	PSA_CRYPTO_KEY_ID_DEFAULT_OWNER -1

#define	PSA_CORE_KEY_ATTRIBUTES_INIT

#define	PSA_KEY_ATTRIBUTES_INIT

#define	PSA_HASH_OPERATION_INIT

#define	PSA_CIPHER_OPERATION_INIT

#define	PSA_MAC_OPERATION_INIT

#define	PSA_AEAD_OPERATION_INIT

#define	PSA_KDF_LABEL_MAX_SIZE (224U - 20U)

#define	PSA_KEY_DERIVATION_OPERATION_INIT {0, MBEDTLS_SVC_KEY_ID_INIT, {0, 0, 0, 0, 0}, false, false}

Typedefs
typedef struct psa_key_policy_s	psa_key_policy_t

typedef uint16_t	psa_key_bits_t

typedef uint16_t	psa_key_attributes_flag_t

Functions
static struct psa_key_policy_s	psa_key_policy_init (void)

psa_status_t	tfm_crypto_get_caller_id (int32_t *id)

static psa_key_attributes_t	psa_key_attributes_init (void)

static void	psa_extend_key_usage_flags (psa_key_usage_t *usage_flags)

static void	psa_set_key_id (psa_key_attributes_t *attributes, psa_key_id_t key)

static psa_key_id_t	psa_get_key_id (const psa_key_attributes_t *attributes)

static void	psa_set_key_lifetime (psa_key_attributes_t *attributes, psa_key_lifetime_t lifetime)

static psa_key_lifetime_t	psa_get_key_lifetime (const psa_key_attributes_t *attributes)

static void	psa_set_key_usage_flags (psa_key_attributes_t *attributes, psa_key_usage_t usage_flags)

static psa_key_usage_t	psa_get_key_usage_flags (const psa_key_attributes_t *attributes)

static void	psa_set_key_algorithm (psa_key_attributes_t *attributes, psa_algorithm_t alg)

static psa_algorithm_t	psa_get_key_algorithm (const psa_key_attributes_t *attributes)

psa_status_t	KeyMgmt_psa_set_key_domain_parameters (psa_key_attributes_t attributes, psa_key_type_t type, const uint8_t data, size_t data_length)

static void	psa_set_key_type (psa_key_attributes_t *attributes, psa_key_type_t type)

static psa_key_type_t	psa_get_key_type (const psa_key_attributes_t *attributes)

static void	psa_set_key_bits (psa_key_attributes_t *attributes, size_t bits)

static size_t	psa_get_key_bits (const psa_key_attributes_t *attributes)

static struct psa_hash_operation_s	psa_hash_operation_init (void)

static struct psa_cipher_operation_s	psa_cipher_operation_init (void)

static struct psa_mac_operation_s	psa_mac_operation_init (void)

static struct psa_aead_operation_s	psa_aead_operation_init (void)

static struct psa_key_derivation_s	psa_key_derivation_operation_init (void)

Macro Definition Documentation

§ PSA_KEY_POLICY_INIT

#define PSA_KEY_POLICY_INIT

Value:

{                       \
        0, 0, 0             \
    }

Referenced by psa_key_policy_init().

§ PSA_KEY_BITS_TOO_LARGE

#define PSA_KEY_BITS_TOO_LARGE ((psa_key_bits_t)(-1))

Referenced by psa_get_key_bits(), and psa_set_key_bits().

§ PSA_MAX_KEY_BITS

#define PSA_MAX_KEY_BITS 0xfff8

Referenced by psa_get_key_bits(), and psa_set_key_bits().

§ PSA_CRYPTO_KEY_ID_DEFAULT_OWNER

#define PSA_CRYPTO_KEY_ID_DEFAULT_OWNER -1

Referenced by psa_set_key_id().

§ PSA_CORE_KEY_ATTRIBUTES_INIT

#define PSA_CORE_KEY_ATTRIBUTES_INIT

Value:

(psa_core_key_attributes_t)      \
    {                                \
        0                            \
    }

§ PSA_KDF_LABEL_MAX_SIZE

#define PSA_KDF_LABEL_MAX_SIZE (224U - 20U)

The maximum length of the label used in the Key Derivation Function (KDF).

Typedef Documentation

§ psa_key_policy_t

typedef struct psa_key_policy_s psa_key_policy_t

§ psa_key_bits_t

typedef uint16_t psa_key_bits_t

§ psa_key_attributes_flag_t

typedef uint16_t psa_key_attributes_flag_t

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.