Key attributes#

Functions#

psa_key_attributes_t

Return an initial value for a key attributes structure.

void
psa_set_key_id(psa_key_attributes_t *attributes, mbedtls_svc_key_id_t key)

Declare a key as persistent and set its key identifier.

void
psa_set_key_lifetime(psa_key_attributes_t *attributes, psa_key_lifetime_t lifetime)

Set the location of a persistent key.

psa_get_key_id(const psa_key_attributes_t *attributes)

Retrieve the key identifier from key attributes.

psa_get_key_lifetime(const psa_key_attributes_t *attributes)

Retrieve the lifetime from key attributes.

void
psa_set_key_usage_flags(psa_key_attributes_t *attributes, psa_key_usage_t usage_flags)

Declare usage flags for a key.

psa_get_key_usage_flags(const psa_key_attributes_t *attributes)

Retrieve the usage flags from key attributes.

void
psa_set_key_algorithm(psa_key_attributes_t *attributes, psa_algorithm_t alg)

Declare the permitted algorithm policy for a key.

psa_get_key_algorithm(const psa_key_attributes_t *attributes)

Retrieve the algorithm policy from key attributes.

void
psa_set_key_type(psa_key_attributes_t *attributes, psa_key_type_t type)

Declare the type of a key.

void
psa_set_key_bits(psa_key_attributes_t *attributes, size_t bits)

Declare the size of a key.

psa_get_key_type(const psa_key_attributes_t *attributes)

Retrieve the key type from key attributes.

size_t
psa_get_key_bits(const psa_key_attributes_t *attributes)

Retrieve the key size from key attributes.

psa_get_key_attributes(mbedtls_svc_key_id_t key, psa_key_attributes_t *attributes)

Retrieve the attributes of a key.

void
psa_reset_key_attributes(psa_key_attributes_t *attributes)

Reset a key attribute structure to a freshly initialized state.

void
psa_set_key_enrollment_algorithm(psa_key_attributes_t *attributes, psa_algorithm_t alg2)

Declare the enrollment algorithm for a key.

psa_get_key_enrollment_algorithm(const psa_key_attributes_t *attributes)

Retrieve the enrollment algorithm policy from key attributes.

psa_set_key_domain_parameters(psa_key_attributes_t *attributes, psa_key_type_t type, const uint8_t *data, size_t data_length)

Set domain parameters for a key.

psa_get_key_domain_parameters(const psa_key_attributes_t *attributes, uint8_t *data, size_t data_size, size_t *data_length)

Get domain parameters for a key.

Macros#

#define

PAKE operation stages.

#define
PSA_DH_FAMILY_CUSTOM ((psa_dh_family_t) 0x7e)

Custom Diffie-Hellman group.

#define
PSA_KEY_DOMAIN_PARAMETERS_SIZE (key_type, key_bits)

Safe output buffer size for psa_get_key_domain_parameters().

#define
PSA_DH_FAMILY_CUSTOM ((psa_dh_family_t) 0x7e)

Custom Diffie-Hellman group.

#define

PAKE operation stages.

#define
PSA_KEY_DOMAIN_PARAMETERS_SIZE (key_type, key_bits)

Safe output buffer size for psa_get_key_domain_parameters().

Function Documentation#

psa_key_attributes_init#

static psa_key_attributes_t psa_key_attributes_init (void )

Return an initial value for a key attributes structure.

Parameters
N/A

Definition at line 129 of file util/third_party/mbedtls/include/psa/crypto.h

psa_set_key_id#

static void psa_set_key_id (psa_key_attributes_t * attributes, mbedtls_svc_key_id_t key)

Declare a key as persistent and set its key identifier.

Parameters
[out]attributes

The attribute structure to write to.

N/Akey

The persistent identifier for the key.

If the attribute structure currently declares the key as volatile (which is the default content of an attribute structure), this function sets the lifetime attribute to PSA_KEY_LIFETIME_PERSISTENT.

This function does not access storage, it merely stores the given value in the structure. The persistent key will be written to storage when the attribute structure is passed to a key creation function such as psa_import_key(), psa_generate_key(), psa_key_derivation_output_key() or psa_copy_key().

This function may be declared as static (i.e. without external linkage). This function may be provided as a function-like macro, but in this case it must evaluate each of its arguments exactly once.


Definition at line 151 of file util/third_party/mbedtls/include/psa/crypto.h

psa_set_key_lifetime#

static void psa_set_key_lifetime (psa_key_attributes_t * attributes, psa_key_lifetime_t lifetime)

Set the location of a persistent key.

Parameters
[out]attributes

The attribute structure to write to.

N/Alifetime

The lifetime for the key. If this is PSA_KEY_LIFETIME_VOLATILE, the key will be volatile, and the key identifier attribute is reset to 0.

To make a key persistent, you must give it a persistent key identifier with psa_set_key_id(). By default, a key that has a persistent identifier is stored in the default storage area identifier by PSA_KEY_LIFETIME_PERSISTENT. Call this function to choose a storage area, or to explicitly declare the key as volatile.

This function does not access storage, it merely stores the given value in the structure. The persistent key will be written to storage when the attribute structure is passed to a key creation function such as psa_import_key(), psa_generate_key(), psa_key_derivation_output_key() or psa_copy_key().

This function may be declared as static (i.e. without external linkage). This function may be provided as a function-like macro, but in this case it must evaluate each of its arguments exactly once.


Definition at line 198 of file util/third_party/mbedtls/include/psa/crypto.h

psa_get_key_id#

static mbedtls_svc_key_id_t psa_get_key_id (const psa_key_attributes_t * attributes)

Retrieve the key identifier from key attributes.

Parameters
[in]attributes

The key attribute structure to query.

This function may be declared as static (i.e. without external linkage). This function may be provided as a function-like macro, but in this case it must evaluate its argument exactly once.

Returns

  • The persistent identifier stored in the attribute structure. This value is unspecified if the attribute structure declares the key as volatile.


Definition at line 213 of file util/third_party/mbedtls/include/psa/crypto.h

psa_get_key_lifetime#

static psa_key_lifetime_t psa_get_key_lifetime (const psa_key_attributes_t * attributes)

Retrieve the lifetime from key attributes.

Parameters
[in]attributes

The key attribute structure to query.

This function may be declared as static (i.e. without external linkage). This function may be provided as a function-like macro, but in this case it must evaluate its argument exactly once.

Returns

  • The lifetime value stored in the attribute structure.


Definition at line 226 of file util/third_party/mbedtls/include/psa/crypto.h

psa_set_key_usage_flags#

static void psa_set_key_usage_flags (psa_key_attributes_t * attributes, psa_key_usage_t usage_flags)

Declare usage flags for a key.

Parameters
[out]attributes

The attribute structure to write to.

N/Ausage_flags

The usage flags to write.

Usage flags are part of a key's usage policy. They encode what kind of operations are permitted on the key. For more details, refer to the documentation of the type psa_key_usage_t.

This function overwrites any usage flags previously set in attributes.

This function may be declared as static (i.e. without external linkage). This function may be provided as a function-like macro, but in this case it must evaluate each of its arguments exactly once.


Definition at line 245 of file util/third_party/mbedtls/include/psa/crypto.h

psa_get_key_usage_flags#

static psa_key_usage_t psa_get_key_usage_flags (const psa_key_attributes_t * attributes)

Retrieve the usage flags from key attributes.

Parameters
[in]attributes

The key attribute structure to query.

This function may be declared as static (i.e. without external linkage). This function may be provided as a function-like macro, but in this case it must evaluate its argument exactly once.

Returns

  • The usage flags stored in the attribute structure.


Definition at line 258 of file util/third_party/mbedtls/include/psa/crypto.h

psa_set_key_algorithm#

static void psa_set_key_algorithm (psa_key_attributes_t * attributes, psa_algorithm_t alg)

Declare the permitted algorithm policy for a key.

Parameters
[out]attributes

The attribute structure to write to.

N/Aalg

The permitted algorithm policy to write.

The permitted algorithm policy of a key encodes which algorithm or algorithms are permitted to be used with this key. The following algorithm policies are supported:

  • 0 does not allow any cryptographic operation with the key. The key may be used for non-cryptographic actions such as exporting (if permitted by the usage flags).

  • An algorithm value permits this particular algorithm.

  • An algorithm wildcard built from PSA_ALG_ANY_HASH allows the specified signature scheme with any hash algorithm.

  • An algorithm built from PSA_ALG_AT_LEAST_THIS_LENGTH_MAC allows any MAC algorithm from the same base class (e.g. CMAC) which generates/verifies a MAC length greater than or equal to the length encoded in the wildcard algorithm.

  • An algorithm built from PSA_ALG_AEAD_WITH_AT_LEAST_THIS_LENGTH_TAG allows any AEAD algorithm from the same base class (e.g. CCM) which generates/verifies a tag length greater than or equal to the length encoded in the wildcard algorithm.

This function overwrites any algorithm policy previously set in attributes.

This function may be declared as static (i.e. without external linkage). This function may be provided as a function-like macro, but in this case it must evaluate each of its arguments exactly once.


Definition at line 291 of file util/third_party/mbedtls/include/psa/crypto.h

psa_get_key_algorithm#

static psa_algorithm_t psa_get_key_algorithm (const psa_key_attributes_t * attributes)

Retrieve the algorithm policy from key attributes.

Parameters
[in]attributes

The key attribute structure to query.

This function may be declared as static (i.e. without external linkage). This function may be provided as a function-like macro, but in this case it must evaluate its argument exactly once.

Returns

  • The algorithm stored in the attribute structure.


Definition at line 305 of file util/third_party/mbedtls/include/psa/crypto.h

psa_set_key_type#

static void psa_set_key_type (psa_key_attributes_t * attributes, psa_key_type_t type)

Declare the type of a key.

Parameters
[out]attributes

The attribute structure to write to.

N/Atype

The key type to write. If this is 0, the key type in attributes becomes unspecified.

This function overwrites any key type previously set in attributes.

This function may be declared as static (i.e. without external linkage). This function may be provided as a function-like macro, but in this case it must evaluate each of its arguments exactly once.


Definition at line 322 of file util/third_party/mbedtls/include/psa/crypto.h

psa_set_key_bits#

static void psa_set_key_bits (psa_key_attributes_t * attributes, size_t bits)

Declare the size of a key.

Parameters
[out]attributes

The attribute structure to write to.

N/Abits

The key size in bits. If this is 0, the key size in attributes becomes unspecified. Keys of size 0 are not supported.

This function overwrites any key size previously set in attributes.

This function may be declared as static (i.e. without external linkage). This function may be provided as a function-like macro, but in this case it must evaluate each of its arguments exactly once.


Definition at line 340 of file util/third_party/mbedtls/include/psa/crypto.h

psa_get_key_type#

static psa_key_type_t psa_get_key_type (const psa_key_attributes_t * attributes)

Retrieve the key type from key attributes.

Parameters
[in]attributes

The key attribute structure to query.

This function may be declared as static (i.e. without external linkage). This function may be provided as a function-like macro, but in this case it must evaluate its argument exactly once.

Returns

  • The key type stored in the attribute structure.


Definition at line 353 of file util/third_party/mbedtls/include/psa/crypto.h

psa_get_key_bits#

static size_t psa_get_key_bits (const psa_key_attributes_t * attributes)

Retrieve the key size from key attributes.

Parameters
[in]attributes

The key attribute structure to query.

This function may be declared as static (i.e. without external linkage). This function may be provided as a function-like macro, but in this case it must evaluate its argument exactly once.

Returns

  • The key size stored in the attribute structure, in bits.


Definition at line 365 of file util/third_party/mbedtls/include/psa/crypto.h

psa_get_key_attributes#

psa_status_t psa_get_key_attributes (mbedtls_svc_key_id_t key, psa_key_attributes_t * attributes)

Retrieve the attributes of a key.

Parameters
[in]key

Identifier of the key to query.

[inout]attributes

On success, the attributes of the key. On failure, equivalent to a freshly-initialized structure.

This function first resets the attribute structure as with psa_reset_key_attributes(). It then copies the attributes of the given key into the given attribute structure.

Note

  • This function may allocate memory or other resources. Once you have called this function on an attribute structure, you must call psa_reset_key_attributes() to free these resources.


Definition at line 395 of file util/third_party/mbedtls/include/psa/crypto.h

psa_reset_key_attributes#

void psa_reset_key_attributes (psa_key_attributes_t * attributes)

Reset a key attribute structure to a freshly initialized state.

Parameters
[inout]attributes

The attribute structure to reset.

You must initialize the attribute structure as described in the documentation of the type #psa_key_attributes_t before calling this function. Once the structure has been initialized, you may call this function at any time.

This function frees any auxiliary resources that the structure may contain.


Definition at line 410 of file util/third_party/mbedtls/include/psa/crypto.h

psa_set_key_enrollment_algorithm#

static void psa_set_key_enrollment_algorithm (psa_key_attributes_t * attributes, psa_algorithm_t alg2)

Declare the enrollment algorithm for a key.

Parameters
[out]attributes

The attribute structure to write to.

N/Aalg2

A second algorithm that the key may be used for, in addition to the algorithm set with psa_set_key_algorithm().

An operation on a key may indifferently use the algorithm set with psa_set_key_algorithm() or with this function.

Warnings

  • Setting an enrollment algorithm is not recommended, because using the same key with different algorithms can allow some attacks based on arithmetic relations between different computations made with the same key, or can escalate harmless side channels into exploitable ones. Use this function only if it is necessary to support a protocol for which it has been verified that the usage of the key with multiple algorithms is safe.


Definition at line 64 of file util/third_party/trusted-firmware-m/interface/include/psa/crypto_extra.h

psa_get_key_enrollment_algorithm#

static psa_algorithm_t psa_get_key_enrollment_algorithm (const psa_key_attributes_t * attributes)

Retrieve the enrollment algorithm policy from key attributes.

Parameters
[in]attributes

The key attribute structure to query.

Returns

  • The enrollment algorithm stored in the attribute structure.


Definition at line 77 of file util/third_party/trusted-firmware-m/interface/include/psa/crypto_extra.h

psa_set_key_domain_parameters#

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

Set domain parameters for a key.

Parameters
[inout]attributes

Attribute structure where the specified domain parameters will be stored. If this function fails, the content of attributes is not modified.

N/Atype

Key type (a PSA_KEY_TYPE_XXX value).

[in]data

Buffer containing the key domain parameters. The content of this buffer is interpreted according to type as described above.

N/Adata_length

Size of the data buffer in bytes.

Some key types require additional domain parameters in addition to the key type identifier and the key size. Use this function instead of psa_set_key_type() when you need to specify domain parameters.

The format for the required domain parameters varies based on the key type.

  • For RSA keys (PSA_KEY_TYPE_RSA_PUBLIC_KEY or PSA_KEY_TYPE_RSA_KEY_PAIR), the domain parameter data consists of the public exponent, represented as a big-endian integer with no leading zeros. This information is used when generating an RSA key pair. When importing a key, the public exponent is read from the imported key data and the exponent recorded in the attribute structure is ignored. As an exception, the public exponent 65537 is represented by an empty byte string.

  • For DSA keys (PSA_KEY_TYPE_DSA_PUBLIC_KEY or PSA_KEY_TYPE_DSA_KEY_PAIR), the Dss-Parms format as defined by RFC 3279 §2.3.2.

    Dss-Parms ::= SEQUENCE  {
       p       INTEGER,
       q       INTEGER,
       g       INTEGER
    }
    
  • For Diffie-Hellman key exchange keys (PSA_KEY_TYPE_DH_PUBLIC_KEY(PSA_DH_FAMILY_CUSTOM) or PSA_KEY_TYPE_DH_KEY_PAIR(PSA_DH_FAMILY_CUSTOM)), the DomainParameters format as defined by RFC 3279 §2.3.3.

    DomainParameters ::= SEQUENCE {
       p               INTEGER,                    -- odd prime, p=jq +1
       g               INTEGER,                    -- generator, g
       q               INTEGER,                    -- factor of p-1
       j               INTEGER OPTIONAL,           -- subgroup factor
       validationParms ValidationParms OPTIONAL
    }
    ValidationParms ::= SEQUENCE {
       seed            BIT STRING,
       pgenCounter     INTEGER
    }
    

Note

  • This function may allocate memory or other resources. Once you have called this function on an attribute structure, you must call psa_reset_key_attributes() to free these resources.

  • This is an experimental extension to the interface. It may change in future versions of the library.

Some key types require additional domain parameters in addition to the key type identifier and the key size. Use this function instead of psa_set_key_type() when you need to specify domain parameters.

The format for the required domain parameters varies based on the key type.

  • For RSA keys (PSA_KEY_TYPE_RSA_PUBLIC_KEY or PSA_KEY_TYPE_RSA_KEY_PAIR), the domain parameter data consists of the public exponent, represented as a big-endian integer with no leading zeros. This information is used when generating an RSA key pair. When importing a key, the public exponent is read from the imported key data and the exponent recorded in the attribute structure is ignored. As an exception, the public exponent 65537 is represented by an empty byte string.

  • For DSA keys (PSA_KEY_TYPE_DSA_PUBLIC_KEY or PSA_KEY_TYPE_DSA_KEY_PAIR), the Dss-Params format as defined by RFC 3279 §2.3.2.

    Dss-Params ::= SEQUENCE  {
       p       INTEGER,
       q       INTEGER,
       g       INTEGER
    }
    
  • For Diffie-Hellman key exchange keys (PSA_KEY_TYPE_DH_PUBLIC_KEY(PSA_DH_FAMILY_CUSTOM) or PSA_KEY_TYPE_DH_KEY_PAIR(PSA_DH_FAMILY_CUSTOM)), the DomainParameters format as defined by RFC 3279 §2.3.3.

    DomainParameters ::= SEQUENCE {
       p               INTEGER,                    -- odd prime, p=jq +1
       g               INTEGER,                    -- generator, g
       q               INTEGER,                    -- factor of p-1
       j               INTEGER OPTIONAL,           -- subgroup factor
       validationParams ValidationParams OPTIONAL
    }
    ValidationParams ::= SEQUENCE {
       seed            BIT STRING,
       pgenCounter     INTEGER
    }
    

Note

  • This function may allocate memory or other resources. Once you have called this function on an attribute structure, you must call psa_reset_key_attributes() to free these resources.

  • This is an experimental extension to the interface. It may change in future versions of the library.


Definition at line 304 of file util/third_party/trusted-firmware-m/interface/include/psa/crypto_extra.h

psa_get_key_domain_parameters#

psa_status_t psa_get_key_domain_parameters (const psa_key_attributes_t * attributes, uint8_t * data, size_t data_size, size_t * data_length)

Get domain parameters for a key.

Parameters
[in]attributes

The key attribute structure to query.

[out]data

On success, the key domain parameters.

N/Adata_size

Size of the data buffer in bytes. The buffer is guaranteed to be large enough if its size in bytes is at least the value given by PSA_KEY_DOMAIN_PARAMETERS_SIZE().

[out]data_length

On success, the number of bytes that make up the key domain parameters data.

Get the domain parameters for a key with this function, if any. The format of the domain parameters written to data is specified in the documentation for psa_set_key_domain_parameters().

Note

  • This is an experimental extension to the interface. It may change in future versions of the library.

Get the domain parameters for a key with this function, if any. The format of the domain parameters written to data is specified in the documentation for psa_set_key_domain_parameters().

Note

  • This is an experimental extension to the interface. It may change in future versions of the library.


Definition at line 332 of file util/third_party/trusted-firmware-m/interface/include/psa/crypto_extra.h

Macro Definition Documentation#

PSA_PAKE_OPERATION_STAGE_SETUP#

#define PSA_PAKE_OPERATION_STAGE_SETUP
Value:
0

PAKE operation stages.


Definition at line 41 of file util/third_party/trusted-firmware-m/interface/include/psa/crypto_extra.h

PSA_PAKE_OPERATION_STAGE_COLLECT_INPUTS#

#define PSA_PAKE_OPERATION_STAGE_COLLECT_INPUTS
Value:
1

Definition at line 42 of file util/third_party/trusted-firmware-m/interface/include/psa/crypto_extra.h

PSA_PAKE_OPERATION_STAGE_COMPUTATION#

#define PSA_PAKE_OPERATION_STAGE_COMPUTATION
Value:
2

Definition at line 43 of file util/third_party/trusted-firmware-m/interface/include/psa/crypto_extra.h

PSA_DH_FAMILY_CUSTOM#

#define PSA_DH_FAMILY_CUSTOM
Value:
((psa_dh_family_t) 0x7e)

Custom Diffie-Hellman group.

For keys of type PSA_KEY_TYPE_DH_PUBLIC_KEY(PSA_DH_FAMILY_CUSTOM) or PSA_KEY_TYPE_DH_KEY_PAIR(PSA_DH_FAMILY_CUSTOM), the group data comes from domain parameters set by psa_set_key_domain_parameters().


Definition at line 235 of file util/third_party/trusted-firmware-m/interface/include/psa/crypto_extra.h

PSA_KEY_DOMAIN_PARAMETERS_SIZE#

#define PSA_KEY_DOMAIN_PARAMETERS_SIZE
Value:
(PSA_KEY_TYPE_IS_RSA(key_type) ? sizeof(int) : \
PSA_KEY_TYPE_IS_DH(key_type) ? PSA_DH_KEY_DOMAIN_PARAMETERS_SIZE(key_bits) : \
PSA_KEY_TYPE_IS_DSA(key_type) ? PSA_DSA_KEY_DOMAIN_PARAMETERS_SIZE(key_bits) : \
0)

Safe output buffer size for psa_get_key_domain_parameters().

This macro returns a compile-time constant if its arguments are compile-time constants.

Warnings

  • This function may call its arguments multiple times or zero times, so you should not pass arguments that contain side effects.

Note

  • This is an experimental extension to the interface. It may change in future versions of the library.

Returns

  • If the parameters are valid and supported, return a buffer size in bytes that guarantees that psa_get_key_domain_parameters() will not fail with PSA_ERROR_BUFFER_TOO_SMALL. If the parameters are a valid combination that is not supported by the implementation, this macro shall return either a sensible size or 0. If the parameters are not valid, the return value is unspecified.


Definition at line 363 of file util/third_party/trusted-firmware-m/interface/include/psa/crypto_extra.h

PSA_DH_KEY_DOMAIN_PARAMETERS_SIZE#

#define PSA_DH_KEY_DOMAIN_PARAMETERS_SIZE
Value:
(key_bits)

Definition at line 368 of file util/third_party/trusted-firmware-m/interface/include/psa/crypto_extra.h

PSA_DSA_KEY_DOMAIN_PARAMETERS_SIZE#

#define PSA_DSA_KEY_DOMAIN_PARAMETERS_SIZE
Value:
(key_bits)

Definition at line 370 of file util/third_party/trusted-firmware-m/interface/include/psa/crypto_extra.h

PSA_DH_FAMILY_CUSTOM#

#define PSA_DH_FAMILY_CUSTOM
Value:
((psa_dh_family_t) 0x7e)

Custom Diffie-Hellman group.

For keys of type PSA_KEY_TYPE_DH_PUBLIC_KEY(PSA_DH_FAMILY_CUSTOM) or PSA_KEY_TYPE_DH_KEY_PAIR(PSA_DH_FAMILY_CUSTOM), the group data comes from domain parameters set by psa_set_key_domain_parameters().


Definition at line 435 of file util/third_party/mbedtls/include/psa/crypto_extra.h

PSA_PAKE_OPERATION_STAGE_SETUP#

#define PSA_PAKE_OPERATION_STAGE_SETUP
Value:
0

PAKE operation stages.


Definition at line 438 of file util/third_party/mbedtls/include/psa/crypto_extra.h

PSA_PAKE_OPERATION_STAGE_COLLECT_INPUTS#

#define PSA_PAKE_OPERATION_STAGE_COLLECT_INPUTS
Value:
1

Definition at line 439 of file util/third_party/mbedtls/include/psa/crypto_extra.h

PSA_PAKE_OPERATION_STAGE_COMPUTATION#

#define PSA_PAKE_OPERATION_STAGE_COMPUTATION
Value:
2

Definition at line 440 of file util/third_party/mbedtls/include/psa/crypto_extra.h

PSA_KEY_DOMAIN_PARAMETERS_SIZE#

#define PSA_KEY_DOMAIN_PARAMETERS_SIZE
Value:
(PSA_KEY_TYPE_IS_RSA(key_type) ? sizeof(int) : \
PSA_KEY_TYPE_IS_DH(key_type) ? PSA_DH_KEY_DOMAIN_PARAMETERS_SIZE(key_bits) : \
PSA_KEY_TYPE_IS_DSA(key_type) ? PSA_DSA_KEY_DOMAIN_PARAMETERS_SIZE(key_bits) : \
0)

Safe output buffer size for psa_get_key_domain_parameters().

This macro returns a compile-time constant if its arguments are compile-time constants.

Warnings

  • This function may call its arguments multiple times or zero times, so you should not pass arguments that contain side effects.

Note

  • This is an experimental extension to the interface. It may change in future versions of the library.

Returns

  • If the parameters are valid and supported, return a buffer size in bytes that guarantees that psa_get_key_domain_parameters() will not fail with PSA_ERROR_BUFFER_TOO_SMALL. If the parameters are a valid combination that is not supported by the implementation, this macro shall return either a sensible size or 0. If the parameters are not valid, the return value is unspecified.


Definition at line 567 of file util/third_party/mbedtls/include/psa/crypto_extra.h

PSA_DH_KEY_DOMAIN_PARAMETERS_SIZE#

#define PSA_DH_KEY_DOMAIN_PARAMETERS_SIZE
Value:
(key_bits)

Definition at line 572 of file util/third_party/mbedtls/include/psa/crypto_extra.h

PSA_DSA_KEY_DOMAIN_PARAMETERS_SIZE#

#define PSA_DSA_KEY_DOMAIN_PARAMETERS_SIZE
Value:
(key_bits)

Definition at line 574 of file util/third_party/mbedtls/include/psa/crypto_extra.h