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Rename output buffer size macros

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Rename existing support macros for output buffer sizes for PSA Crypto API 1.0.0

Signed-off-by: gabor-mezei-arm <gabor.mezei@arm.com>
This commit is contained in:
gabor-mezei-arm 2020-12-18 14:23:51 +01:00
parent 3c537fedfd
commit cbcec21684
No known key found for this signature in database
GPG Key ID: 106F5A41ECC305BD
12 changed files with 117 additions and 122 deletions
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8
docs/getting_started.md
View File

@ -203,7 +203,7 @@ This example shows how to encrypt data using an AES (Advanced Encryption Standar
void encrypt_with_symmetric_ciphers(const uint8_t *key, size_t key_len)
{
enum {
block_size = PSA_BLOCK_CIPHER_BLOCK_SIZE(PSA_KEY_TYPE_AES),
block_size = PSA_BLOCK_CIPHER_BLOCK_LENGTH(PSA_KEY_TYPE_AES),
};
psa_status_t status;
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
@ -288,7 +288,7 @@ This example shows how to decrypt encrypted data using an AES key in CBC mode wi
void decrypt_with_symmetric_ciphers(const uint8_t *key, size_t key_len)
{
enum {
block_size = PSA_BLOCK_CIPHER_BLOCK_SIZE(PSA_KEY_TYPE_AES),
block_size = PSA_BLOCK_CIPHER_BLOCK_LENGTH(PSA_KEY_TYPE_AES),
};
psa_status_t status;
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
@ -445,7 +445,7 @@ This example shows how to verify the SHA-256 hash of a message:
0x5d, 0xae, 0x22, 0x23, 0xb0, 0x03, 0x61, 0xa3, 0x96, 0x17, 0x7a, 0x9c,
0xb4, 0x10, 0xff, 0x61, 0xf2, 0x00, 0x15, 0xad
};
size_t expected_hash_len = PSA_HASH_SIZE(alg);
size_t expected_hash_len = PSA_HASH_LENGTH(alg);
printf("Verify a hash...\t");
fflush(stdout);
@ -482,7 +482,7 @@ This example shows how to verify the SHA-256 hash of a message:
mbedtls_psa_crypto_free();
```
The API provides the macro `PSA_HASH_SIZE`, which returns the expected hash length (in bytes) for the specified algorithm.
The API provides the macro `PSA_HASH_LENGTH`, which returns the expected hash length (in bytes) for the specified algorithm.
#### Handling hash operation contexts

14
include/psa/crypto.h
View File

@ -713,7 +713,7 @@ psa_status_t psa_import_key(const psa_key_attributes_t *attributes,
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
* The size of the \p data buffer is too small. You can determine a
* sufficient buffer size by calling
* #PSA_KEY_EXPORT_MAX_SIZE(\c type, \c bits)
* #PSA_EXPORT_KEY_OUTPUT_SIZE(\c type, \c bits)
* where \c type is the key type
* and \c bits is the key size in bits.
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
@ -783,7 +783,7 @@ psa_status_t psa_export_key(mbedtls_svc_key_id_t key,
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
* The size of the \p data buffer is too small. You can determine a
* sufficient buffer size by calling
* #PSA_KEY_EXPORT_MAX_SIZE(#PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR(\c type), \c bits)
* #PSA_EXPORT_KEY_OUTPUT_SIZE(#PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR(\c type), \c bits)
* where \c type is the key type
* and \c bits is the key size in bits.
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
@ -822,7 +822,7 @@ psa_status_t psa_export_public_key(mbedtls_svc_key_id_t key,
* \param hash_size Size of the \p hash buffer in bytes.
* \param[out] hash_length On success, the number of bytes
* that make up the hash value. This is always
* #PSA_HASH_SIZE(\p alg).
* #PSA_HASH_LENGTH(\p alg).
*
* \retval #PSA_SUCCESS
* Success.
@ -1032,7 +1032,7 @@ psa_status_t psa_hash_update(psa_hash_operation_t *operation,
* \param hash_size Size of the \p hash buffer in bytes.
* \param[out] hash_length On success, the number of bytes
* that make up the hash value. This is always
* #PSA_HASH_SIZE(\c alg) where \c alg is the
* #PSA_HASH_LENGTH(\c alg) where \c alg is the
* hash algorithm that is calculated.
*
* \retval #PSA_SUCCESS
@ -1041,7 +1041,7 @@ psa_status_t psa_hash_update(psa_hash_operation_t *operation,
* The operation state is not valid (it must be active).
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
* The size of the \p hash buffer is too small. You can determine a
* sufficient buffer size by calling #PSA_HASH_SIZE(\c alg)
* sufficient buffer size by calling #PSA_HASH_LENGTH(\c alg)
* where \c alg is the hash algorithm that is calculated.
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
@ -1479,7 +1479,7 @@ psa_status_t psa_mac_update(psa_mac_operation_t *operation,
* \param mac_size Size of the \p mac buffer in bytes.
* \param[out] mac_length On success, the number of bytes
* that make up the MAC value. This is always
* #PSA_MAC_FINAL_SIZE(\c key_type, \c key_bits, \c alg)
* #PSA_MAC_LENGTH(\c key_type, \c key_bits, \c alg)
* where \c key_type and \c key_bits are the type and
* bit-size respectively of the key and \c alg is the
* MAC algorithm that is calculated.
@ -1491,7 +1491,7 @@ psa_status_t psa_mac_update(psa_mac_operation_t *operation,
* operation).
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
* The size of the \p mac buffer is too small. You can determine a
* sufficient buffer size by calling PSA_MAC_FINAL_SIZE().
* sufficient buffer size by calling PSA_MAC_LENGTH().
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
* \retval #PSA_ERROR_HARDWARE_FAILURE

13
include/psa/crypto_compat.h
View File

@ -110,7 +110,18 @@ typedef MBEDTLS_PSA_DEPRECATED psa_algorithm_t mbedtls_deprecated_psa_algorithm_
MBEDTLS_DEPRECATED_CONSTANT( size_t, PSA_SIGNATURE_MAX_SIZE )
#define PSA_ASYMMETRIC_SIGN_OUTPUT_SIZE( key_type, key_bits, alg ) \
MBEDTLS_DEPRECATED_CONSTANT( size_t, PSA_SIGN_OUTPUT_SIZE( key_type, key_bits, alg ) )
#define PSA_KEY_EXPORT_MAX_SIZE( key_type, key_bits ) \
PSA_EXPORT_KEY_OUTPUT_SIZE( key_type, key_bits )
#define PSA_BLOCK_CIPHER_BLOCK_SIZE( type ) \
PSA_BLOCK_CIPHER_BLOCK_LENGTH( type )
#define PSA_MAX_BLOCK_CIPHER_BLOCK_SIZE \
PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE
#define PSA_HASH_SIZE( alg ) \
PSA_HASH_LENGTH( alg )
#define PSA_MAC_FINAL_SIZE( key_type, key_bits, alg ) \
PSA_MAC_LENGTH( key_type, key_bits, alg )
#define PSA_ALG_TLS12_PSK_TO_MS_MAX_PSK_LEN \
PSA_TLS12_PSK_TO_MS_PSK_MAX_SIZE
/*
* Deprecated PSA Crypto function names (PSA Crypto API <= 1.0 beta3)
*/

80
include/psa/crypto_sizes.h
View File

@ -68,8 +68,8 @@
* An implementation may return either 0 or the correct size
* for a hash algorithm that it recognizes, but does not support.
*/
#define PSA_HASH_SIZE(alg) \
( \
#define PSA_HASH_LENGTH(alg) \
( \
PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_MD2 ? 16 : \
PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_MD4 ? 16 : \
PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_MD5 ? 16 : \
@ -188,10 +188,10 @@
#define PSA_VENDOR_ECC_MAX_CURVE_BITS 0
#endif
/** \def PSA_ALG_TLS12_PSK_TO_MS_MAX_PSK_LEN
*
* This macro returns the maximum length of the PSK supported
* by the TLS-1.2 PSK-to-MS key derivation.
/** This macro returns the maximum length of the PSK supported
* by the TLS-1.2 PSK-to-MS key derivation
* (#PSA_ALG_TLS12_PSK_TO_MS(\p hash_alg)). It is independent from the
* choice of hash algorithms.
*
* Quoting RFC 4279, Sect 5.3:
* TLS implementations supporting these ciphersuites MUST support
@ -200,17 +200,21 @@
* keys is RECOMMENDED.
*
* Therefore, no implementation should define a value smaller than 64
* for #PSA_ALG_TLS12_PSK_TO_MS_MAX_PSK_LEN.
* for #PSA_TLS12_PSK_TO_MS_PSK_MAX_SIZE.
*/
#define PSA_ALG_TLS12_PSK_TO_MS_MAX_PSK_LEN 128
#define PSA_TLS12_PSK_TO_MS_PSK_MAX_SIZE 128
/** The maximum size of a block cipher supported by the implementation. */
#define PSA_MAX_BLOCK_CIPHER_BLOCK_SIZE 16
#define PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE 16
/** The size of the output of psa_mac_sign_finish(), in bytes.
*
* This is also the MAC size that psa_mac_verify_finish() expects.
*
* \warning This macro may evaluate its arguments multiple times or
* zero times, so you should not pass arguments that contain
* side effects.
*
* \param key_type The type of the MAC key.
* \param key_bits The size of the MAC key in bits.
* \param alg A MAC algorithm (\c PSA_ALG_XXX value such that
@ -224,10 +228,10 @@
* \return Unspecified if the key parameters are not consistent
* with the algorithm.
*/
#define PSA_MAC_FINAL_SIZE(key_type, key_bits, alg) \
((alg) & PSA_ALG_MAC_TRUNCATION_MASK ? PSA_MAC_TRUNCATED_LENGTH(alg) : \
PSA_ALG_IS_HMAC(alg) ? PSA_HASH_SIZE(PSA_ALG_HMAC_GET_HASH(alg)) : \
PSA_ALG_IS_BLOCK_CIPHER_MAC(alg) ? PSA_BLOCK_CIPHER_BLOCK_SIZE(key_type) : \
#define PSA_MAC_LENGTH(key_type, key_bits, alg) \
((alg) & PSA_ALG_MAC_TRUNCATION_MASK ? PSA_MAC_TRUNCATED_LENGTH(alg) : \
PSA_ALG_IS_HMAC(alg) ? PSA_HASH_LENGTH(PSA_ALG_HMAC_GET_HASH(alg)) : \
PSA_ALG_IS_BLOCK_CIPHER_MAC(alg) ? PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
((void)(key_type), (void)(key_bits), 0))
/** The maximum size of the output of psa_aead_encrypt(), in bytes.
@ -326,7 +330,7 @@
*/
#define PSA_AEAD_FINISH_OUTPUT_SIZE(alg) \
(PSA_ALG_IS_AEAD_ON_BLOCK_CIPHER(alg) ? \
PSA_MAX_BLOCK_CIPHER_BLOCK_SIZE : \
PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE : \
0)
/** A sufficient plaintext buffer size for psa_aead_verify().
@ -349,12 +353,12 @@
*/
#define PSA_AEAD_VERIFY_OUTPUT_SIZE(alg) \
(PSA_ALG_IS_AEAD_ON_BLOCK_CIPHER(alg) ? \
PSA_MAX_BLOCK_CIPHER_BLOCK_SIZE : \
PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE : \
0)
#define PSA_RSA_MINIMUM_PADDING_SIZE(alg) \
(PSA_ALG_IS_RSA_OAEP(alg) ? \
2 * PSA_HASH_SIZE(PSA_ALG_RSA_OAEP_GET_HASH(alg)) + 1 : \
2 * PSA_HASH_LENGTH(PSA_ALG_RSA_OAEP_GET_HASH(alg)) + 1 : \
11 /*PKCS#1v1.5*/)
/**
@ -587,12 +591,12 @@
#define PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(key_bits) \
(PSA_BITS_TO_BYTES(key_bits))
/** Sufficient output buffer size for psa_export_key() or psa_export_public_key().
/** Sufficient output buffer size for psa_export_key().
*
* This macro returns a compile-time constant if its arguments are
* compile-time constants.
*
* \warning This function may call its arguments multiple times or
* \warning This macro may evaluate its arguments multiple times or
* zero times, so you should not pass arguments that contain
* side effects.
*
@ -605,7 +609,7 @@
* if (status != PSA_SUCCESS) handle_error(...);
* psa_key_type_t key_type = psa_get_key_type(&attributes);
* size_t key_bits = psa_get_key_bits(&attributes);
* size_t buffer_size = PSA_KEY_EXPORT_MAX_SIZE(key_type, key_bits);
* size_t buffer_size = PSA_EXPORT_KEY_OUTPUT_SIZE(key_type, key_bits);
* psa_reset_key_attributes(&attributes);
* uint8_t *buffer = malloc(buffer_size);
* if (buffer == NULL) handle_error(...);
@ -614,32 +618,12 @@
* if (status != PSA_SUCCESS) handle_error(...);
* \endcode
*
* For psa_export_public_key(), calculate the buffer size from the
* public key type. You can use the macro #PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR
* to convert a key pair type to the corresponding public key type.
* \code{c}
* psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
* psa_status_t status;
* status = psa_get_key_attributes(key, &attributes);
* if (status != PSA_SUCCESS) handle_error(...);
* psa_key_type_t key_type = psa_get_key_type(&attributes);
* psa_key_type_t public_key_type = PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR(key_type);
* size_t key_bits = psa_get_key_bits(&attributes);
* size_t buffer_size = PSA_KEY_EXPORT_MAX_SIZE(public_key_type, key_bits);
* psa_reset_key_attributes(&attributes);
* uint8_t *buffer = malloc(buffer_size);
* if (buffer == NULL) handle_error(...);
* size_t buffer_length;
* status = psa_export_public_key(key, buffer, buffer_size, &buffer_length);
* if (status != PSA_SUCCESS) handle_error(...);
* \endcode
*
* \param key_type A supported key type.
* \param key_bits The size of the key in bits.
*
* \return If the parameters are valid and supported, return
* a buffer size in bytes that guarantees that
* psa_sign_hash() will not fail with
* psa_export_key() 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
@ -647,14 +631,14 @@
* If the parameters are not valid, the
* return value is unspecified.
*/
#define PSA_KEY_EXPORT_MAX_SIZE(key_type, key_bits) \
(PSA_KEY_TYPE_IS_UNSTRUCTURED(key_type) ? PSA_BITS_TO_BYTES(key_bits) : \
(key_type) == PSA_KEY_TYPE_RSA_KEY_PAIR ? PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(key_bits) : \
#define PSA_EXPORT_KEY_OUTPUT_SIZE(key_type, key_bits) \
(PSA_KEY_TYPE_IS_UNSTRUCTURED(key_type) ? PSA_BITS_TO_BYTES(key_bits) : \
(key_type) == PSA_KEY_TYPE_RSA_KEY_PAIR ? PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(key_bits) : \
(key_type) == PSA_KEY_TYPE_RSA_PUBLIC_KEY ? PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(key_bits) : \
(key_type) == PSA_KEY_TYPE_DSA_KEY_PAIR ? PSA_KEY_EXPORT_DSA_KEY_PAIR_MAX_SIZE(key_bits) : \
(key_type) == PSA_KEY_TYPE_DSA_KEY_PAIR ? PSA_KEY_EXPORT_DSA_KEY_PAIR_MAX_SIZE(key_bits) : \
(key_type) == PSA_KEY_TYPE_DSA_PUBLIC_KEY ? PSA_KEY_EXPORT_DSA_PUBLIC_KEY_MAX_SIZE(key_bits) : \
PSA_KEY_TYPE_IS_ECC_KEY_PAIR(key_type) ? PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(key_bits) : \
PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY(key_type) ? PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(key_bits) : \
PSA_KEY_TYPE_IS_ECC_KEY_PAIR(key_type) ? PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(key_bits) : \
PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY(key_type) ? PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(key_bits) : \
0)
/** The default nonce size for an AEAD algorithm, in bytes.
@ -727,13 +711,13 @@
* and cipher algorithm that it recognizes, but does not support.
*/
#define PSA_CIPHER_IV_LENGTH(key_type, alg) \
(PSA_BLOCK_CIPHER_BLOCK_SIZE(key_type) > 1 && \
(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) > 1 && \
((alg) == PSA_ALG_CTR || \
(alg) == PSA_ALG_CFB || \
(alg) == PSA_ALG_OFB || \
(alg) == PSA_ALG_XTS || \
(alg) == PSA_ALG_CBC_NO_PADDING || \
(alg) == PSA_ALG_CBC_PKCS7) ? PSA_BLOCK_CIPHER_BLOCK_SIZE(key_type) : \
(alg) == PSA_ALG_CBC_PKCS7) ? PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
(key_type) == PSA_KEY_TYPE_CHACHA20 && \
(alg) == PSA_ALG_STREAM_CIPHER ? 12 : \
0)

6
include/psa/crypto_values.h
View File

@ -363,7 +363,7 @@
* used for.
*
* HMAC keys should generally have the same size as the underlying hash.
* This size can be calculated with #PSA_HASH_SIZE(\c alg) where
* This size can be calculated with #PSA_HASH_LENGTH(\c alg) where
* \c alg is the HMAC algorithm or the underlying hash algorithm. */
#define PSA_KEY_TYPE_HMAC ((psa_key_type_t)0x1100)
@ -594,9 +594,9 @@
*
* \warning This macro may evaluate its argument multiple times.
*/
#define PSA_BLOCK_CIPHER_BLOCK_SIZE(type) \
#define PSA_BLOCK_CIPHER_BLOCK_LENGTH(type) \
(((type) & PSA_KEY_TYPE_CATEGORY_MASK) == PSA_KEY_TYPE_CATEGORY_SYMMETRIC ? \
1u << PSA_GET_KEY_TYPE_BLOCK_SIZE_EXPONENT(type) : \
1u << PSA_GET_KEY_TYPE_BLOCK_SIZE_EXPONENT(type) : \
0u)
/** Vendor-defined algorithm flag.

30
library/psa_crypto.c
View File

@ -2736,7 +2736,7 @@ psa_status_t psa_hash_finish( psa_hash_operation_t *operation,
{
psa_status_t status;
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
size_t actual_hash_length = PSA_HASH_SIZE( operation->alg );
size_t actual_hash_length = PSA_HASH_LENGTH( operation->alg );
/* Fill the output buffer with something that isn't a valid hash
* (barring an attack on the hash and deliberately-crafted input),
@ -3213,7 +3213,7 @@ static psa_status_t psa_hmac_setup_internal( psa_hmac_internal_data *hmac,
{
uint8_t ipad[PSA_HMAC_MAX_HASH_BLOCK_SIZE];
size_t i;
size_t hash_size = PSA_HASH_SIZE( hash_alg );
size_t hash_size = PSA_HASH_LENGTH( hash_alg );
size_t block_size = psa_get_hash_block_size( hash_alg );
psa_status_t status;
@ -3329,7 +3329,7 @@ static psa_status_t psa_mac_setup( psa_mac_operation_t *operation,
goto exit;
}
operation->mac_size = PSA_HASH_SIZE( hash_alg );
operation->mac_size = PSA_HASH_LENGTH( hash_alg );
/* Sanity check. This shouldn't fail on a valid configuration. */
if( operation->mac_size == 0 ||
operation->mac_size > sizeof( operation->ctx.hmac.opad ) )
@ -3499,7 +3499,7 @@ static psa_status_t psa_mac_finish_internal( psa_mac_operation_t *operation,
#if defined(MBEDTLS_CMAC_C)
if( operation->alg == PSA_ALG_CMAC )
{
uint8_t tmp[PSA_MAX_BLOCK_CIPHER_BLOCK_SIZE];
uint8_t tmp[PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE];
int ret = mbedtls_cipher_cmac_finish( &operation->ctx.cmac, tmp );
if( ret == 0 )
memcpy( mac, tmp, operation->mac_size );
@ -4455,11 +4455,11 @@ static psa_status_t psa_cipher_setup( psa_cipher_operation_t *operation,
#endif //MBEDTLS_CIPHER_MODE_WITH_PADDING
operation->block_size = ( PSA_ALG_IS_STREAM_CIPHER( alg ) ? 1 :
PSA_BLOCK_CIPHER_BLOCK_SIZE( slot->attr.type ) );
PSA_BLOCK_CIPHER_BLOCK_LENGTH( slot->attr.type ) );
if( ( alg & PSA_ALG_CIPHER_FROM_BLOCK_FLAG ) != 0 &&
alg != PSA_ALG_ECB_NO_PADDING )
{
operation->iv_size = PSA_BLOCK_CIPHER_BLOCK_SIZE( slot->attr.type );
operation->iv_size = PSA_BLOCK_CIPHER_BLOCK_LENGTH( slot->attr.type );
}
#if defined(MBEDTLS_CHACHA20_C)
else
@ -4919,7 +4919,7 @@ static psa_status_t psa_aead_setup( aead_operation_t *operation,
/* CCM allows the following tag lengths: 4, 6, 8, 10, 12, 14, 16.
* The call to mbedtls_ccm_encrypt_and_tag or
* mbedtls_ccm_auth_decrypt will validate the tag length. */
if( PSA_BLOCK_CIPHER_BLOCK_SIZE( operation->slot->attr.type ) != 16 )
if( PSA_BLOCK_CIPHER_BLOCK_LENGTH( operation->slot->attr.type ) != 16 )
{
status = PSA_ERROR_INVALID_ARGUMENT;
goto cleanup;
@ -4941,7 +4941,7 @@ static psa_status_t psa_aead_setup( aead_operation_t *operation,
/* GCM allows the following tag lengths: 4, 8, 12, 13, 14, 15, 16.
* The call to mbedtls_gcm_crypt_and_tag or
* mbedtls_gcm_auth_decrypt will validate the tag length. */
if( PSA_BLOCK_CIPHER_BLOCK_SIZE( operation->slot->attr.type ) != 16 )
if( PSA_BLOCK_CIPHER_BLOCK_LENGTH( operation->slot->attr.type ) != 16 )
{
status = PSA_ERROR_INVALID_ARGUMENT;
goto cleanup;
@ -5310,7 +5310,7 @@ static psa_status_t psa_key_derivation_hkdf_read( psa_hkdf_key_derivation_t *hkd
uint8_t *output,
size_t output_length )
{
uint8_t hash_length = PSA_HASH_SIZE( hash_alg );
uint8_t hash_length = PSA_HASH_LENGTH( hash_alg );
psa_status_t status;
if( hkdf->state < HKDF_STATE_KEYED || ! hkdf->info_set )
@ -5380,7 +5380,7 @@ static psa_status_t psa_key_derivation_tls12_prf_generate_next_block(
psa_algorithm_t alg )
{
psa_algorithm_t hash_alg = PSA_ALG_HKDF_GET_HASH( alg );
uint8_t hash_length = PSA_HASH_SIZE( hash_alg );
uint8_t hash_length = PSA_HASH_LENGTH( hash_alg );
psa_hash_operation_t backup = PSA_HASH_OPERATION_INIT;
psa_status_t status, cleanup_status;
@ -5490,7 +5490,7 @@ static psa_status_t psa_key_derivation_tls12_prf_read(
size_t output_length )
{
psa_algorithm_t hash_alg = PSA_ALG_TLS12_PRF_GET_HASH( alg );
uint8_t hash_length = PSA_HASH_SIZE( hash_alg );
uint8_t hash_length = PSA_HASH_LENGTH( hash_alg );
psa_status_t status;
uint8_t offset, length;
@ -5720,7 +5720,7 @@ static psa_status_t psa_key_derivation_setup_kdf(
if( is_kdf_alg_supported )
{
psa_algorithm_t hash_alg = PSA_ALG_HKDF_GET_HASH( kdf_alg );
size_t hash_size = PSA_HASH_SIZE( hash_alg );
size_t hash_size = PSA_HASH_LENGTH( hash_alg );
if( hash_size == 0 )
return( PSA_ERROR_NOT_SUPPORTED );
if( ( PSA_ALG_IS_TLS12_PRF( kdf_alg ) ||
@ -5808,7 +5808,7 @@ static psa_status_t psa_hkdf_input( psa_hkdf_key_derivation_t *hkdf,
sizeof( hkdf->prk ) );
if( status != PSA_SUCCESS )
return( status );
hkdf->offset_in_block = PSA_HASH_SIZE( hash_alg );
hkdf->offset_in_block = PSA_HASH_LENGTH( hash_alg );
hkdf->block_number = 0;
hkdf->state = HKDF_STATE_KEYED;
return( PSA_SUCCESS );
@ -5926,10 +5926,10 @@ static psa_status_t psa_tls12_prf_psk_to_ms_set_key(
size_t data_length )
{
psa_status_t status;
uint8_t pms[ 4 + 2 * PSA_ALG_TLS12_PSK_TO_MS_MAX_PSK_LEN ];
uint8_t pms[ 4 + 2 * PSA_TLS12_PSK_TO_MS_PSK_MAX_SIZE ];
uint8_t *cur = pms;
if( data_length > PSA_ALG_TLS12_PSK_TO_MS_MAX_PSK_LEN )
if( data_length > PSA_TLS12_PSK_TO_MS_PSK_MAX_SIZE )
return( PSA_ERROR_INVALID_ARGUMENT );
/* Quoting RFC 4279, Section 2:

4
library/psa_crypto_driver_wrappers.c
View File

@ -263,7 +263,7 @@ static psa_status_t get_expected_key_size( const psa_key_attributes_t *attribute
switch( location )
{
case PSA_KEY_LOCATION_LOCAL_STORAGE:
buffer_size = PSA_KEY_EXPORT_MAX_SIZE( key_type, key_bits );
buffer_size = PSA_EXPORT_KEY_OUTPUT_SIZE( key_type, key_bits );
if( buffer_size == 0 )
return( PSA_ERROR_NOT_SUPPORTED );
@ -280,7 +280,7 @@ static psa_status_t get_expected_key_size( const psa_key_attributes_t *attribute
if( PSA_KEY_TYPE_IS_KEY_PAIR( key_type ) )
{
int public_key_overhead = ( ( TEST_DRIVER_KEY_CONTEXT_STORE_PUBLIC_KEY == 1 ) ?
PSA_KEY_EXPORT_MAX_SIZE( key_type, key_bits ) : 0 );
PSA_EXPORT_KEY_OUTPUT_SIZE( key_type, key_bits ) : 0 );
*expected_size = TEST_DRIVER_KEY_CONTEXT_BASE_SIZE
+ TEST_DRIVER_KEY_CONTEXT_PUBLIC_KEY_SIZE
+ public_key_overhead;

6
programs/psa/crypto_examples.c
View File

@ -159,7 +159,7 @@ static psa_status_t
cipher_example_encrypt_decrypt_aes_cbc_nopad_1_block( void )
{
enum {
block_size = PSA_BLOCK_CIPHER_BLOCK_SIZE( PSA_KEY_TYPE_AES ),
block_size = PSA_BLOCK_CIPHER_BLOCK_LENGTH( PSA_KEY_TYPE_AES ),
key_bits = 256,
part_size = block_size,
};
@ -207,7 +207,7 @@ exit:
static psa_status_t cipher_example_encrypt_decrypt_aes_cbc_pkcs7_multi( void )
{
enum {
block_size = PSA_BLOCK_CIPHER_BLOCK_SIZE( PSA_KEY_TYPE_AES ),
block_size = PSA_BLOCK_CIPHER_BLOCK_LENGTH( PSA_KEY_TYPE_AES ),
key_bits = 256,
input_size = 100,
part_size = 10,
@ -255,7 +255,7 @@ exit:
static psa_status_t cipher_example_encrypt_decrypt_aes_ctr_multi( void )
{
enum {
block_size = PSA_BLOCK_CIPHER_BLOCK_SIZE( PSA_KEY_TYPE_AES ),
block_size = PSA_BLOCK_CIPHER_BLOCK_LENGTH( PSA_KEY_TYPE_AES ),
key_bits = 256,
input_size = 100,
part_size = 10,

58
tests/suites/test_suite_psa_crypto.function
View File

@ -287,7 +287,7 @@ int check_key_attributes_sanity( mbedtls_svc_key_id_t key )
TEST_ASSERT( bits <= PSA_VENDOR_ECC_MAX_CURVE_BITS );
else if( PSA_KEY_TYPE_IS_RSA( type ) )
TEST_ASSERT( bits <= PSA_VENDOR_RSA_MAX_KEY_BITS );
TEST_ASSERT( PSA_BLOCK_CIPHER_BLOCK_SIZE( type ) <= PSA_MAX_BLOCK_CIPHER_BLOCK_SIZE );
TEST_ASSERT( PSA_BLOCK_CIPHER_BLOCK_LENGTH( type ) <= PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE );
ok = 1;
@ -447,7 +447,7 @@ static int exercise_cipher_key( mbedtls_svc_key_id_t key,
PSA_ASSERT( psa_get_key_attributes( key, &attributes ) );
/* This should be PSA_CIPHER_GET_IV_SIZE but the API doesn't
* have this macro yet. */
iv_length = PSA_BLOCK_CIPHER_BLOCK_SIZE(
iv_length = PSA_BLOCK_CIPHER_BLOCK_LENGTH(
psa_get_key_type( &attributes ) );
maybe_invalid_padding = ! PSA_ALG_IS_STREAM_CIPHER( alg );
psa_reset_key_attributes( &attributes );
@ -550,7 +550,7 @@ static int exercise_signature_key( mbedtls_svc_key_id_t key,
* the hash encoded in the algorithm. Use this input size
* even for algorithms that allow other input sizes. */
if( hash_alg != 0 )
payload_length = PSA_HASH_SIZE( hash_alg );
payload_length = PSA_HASH_LENGTH( hash_alg );
PSA_ASSERT( psa_sign_hash( key, alg,
payload, payload_length,
signature, sizeof( signature ),
@ -714,7 +714,7 @@ static psa_status_t key_agreement_with_self(
private_key_type = psa_get_key_type( &attributes );
key_bits = psa_get_key_bits( &attributes );
public_key_type = PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR( private_key_type );
public_key_length = PSA_KEY_EXPORT_MAX_SIZE( public_key_type, key_bits );
public_key_length = PSA_EXPORT_KEY_OUTPUT_SIZE( public_key_type, key_bits );
ASSERT_ALLOC( public_key, public_key_length );
PSA_ASSERT( psa_export_public_key( key, public_key, public_key_length,
&public_key_length ) );
@ -755,7 +755,7 @@ static psa_status_t raw_key_agreement_with_self( psa_algorithm_t alg,
private_key_type = psa_get_key_type( &attributes );
key_bits = psa_get_key_bits( &attributes );
public_key_type = PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR( private_key_type );
public_key_length = PSA_KEY_EXPORT_MAX_SIZE( public_key_type, key_bits );
public_key_length = PSA_EXPORT_KEY_OUTPUT_SIZE( public_key_type, key_bits );
ASSERT_ALLOC( public_key, public_key_length );
PSA_ASSERT( psa_export_public_key( key,
public_key, public_key_length,
@ -868,7 +868,7 @@ static int exported_key_sanity_check( psa_key_type_t type, size_t bits,
if( PSA_KEY_TYPE_IS_UNSTRUCTURED( type ) )
TEST_EQUAL( exported_length, ( bits + 7 ) / 8 );
else
TEST_ASSERT( exported_length <= PSA_KEY_EXPORT_MAX_SIZE( type, bits ) );
TEST_ASSERT( exported_length <= PSA_EXPORT_KEY_OUTPUT_SIZE( type, bits ) );
#if defined(MBEDTLS_DES_C)
if( type == PSA_KEY_TYPE_DES )
@ -1037,8 +1037,8 @@ static int exercise_export_key( mbedtls_svc_key_id_t key,
goto exit;
}
exported_size = PSA_KEY_EXPORT_MAX_SIZE( psa_get_key_type( &attributes ),
psa_get_key_bits( &attributes ) );
exported_size = PSA_EXPORT_KEY_OUTPUT_SIZE( psa_get_key_type( &attributes ),
psa_get_key_bits( &attributes ) );
ASSERT_ALLOC( exported, exported_size );
PSA_ASSERT( psa_export_key( key,
@ -1078,8 +1078,8 @@ static int exercise_export_public_key( mbedtls_svc_key_id_t key )
public_type = PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR(
psa_get_key_type( &attributes ) );
exported_size = PSA_KEY_EXPORT_MAX_SIZE( public_type,
psa_get_key_bits( &attributes ) );
exported_size = PSA_EXPORT_KEY_OUTPUT_SIZE( public_type,
psa_get_key_bits( &attributes ) );
ASSERT_ALLOC( exported, exported_size );
PSA_ASSERT( psa_export_public_key( key,
@ -1735,7 +1735,7 @@ void import_export( data_t *data,
reexported, reexported_length );
PSA_ASSERT( psa_destroy_key( key2 ) );
}
TEST_ASSERT( exported_length <= PSA_KEY_EXPORT_MAX_SIZE( type, psa_get_key_bits( &got_attributes ) ) );
TEST_ASSERT( exported_length <= PSA_EXPORT_KEY_OUTPUT_SIZE( type, psa_get_key_bits( &got_attributes ) ) );
destroy:
/* Destroy the key */
@ -1795,7 +1795,7 @@ void import_export_public_key( data_t *data,
PSA_ASSERT( psa_get_key_attributes( key, &attributes ) );
bits = psa_get_key_bits( &attributes );
TEST_ASSERT( expected_public_key->len <=
PSA_KEY_EXPORT_MAX_SIZE( public_type, bits ) );
PSA_EXPORT_KEY_OUTPUT_SIZE( public_type, bits ) );
ASSERT_COMPARE( expected_public_key->x, expected_public_key->len,
exported, exported_length );
}
@ -2643,9 +2643,9 @@ void hash_compute_compare( int alg_arg, data_t *input,
/* Compute with tight buffer */
PSA_ASSERT( psa_hash_compute( alg, input->x, input->len,
output, PSA_HASH_SIZE( alg ),
output, PSA_HASH_LENGTH( alg ),
&output_length ) );
TEST_EQUAL( output_length, PSA_HASH_SIZE( alg ) );
TEST_EQUAL( output_length, PSA_HASH_LENGTH( alg ) );
ASSERT_COMPARE( output, output_length,
expected_output->x, expected_output->len );
@ -2653,7 +2653,7 @@ void hash_compute_compare( int alg_arg, data_t *input,
PSA_ASSERT( psa_hash_compute( alg, input->x, input->len,
output, sizeof( output ),
&output_length ) );
TEST_EQUAL( output_length, PSA_HASH_SIZE( alg ) );
TEST_EQUAL( output_length, PSA_HASH_LENGTH( alg ) );
ASSERT_COMPARE( output, output_length,
expected_output->x, expected_output->len );
@ -2785,7 +2785,7 @@ void hash_verify_bad_args( )
0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14, 0x9a, 0xfb, 0xf4, 0xc8,
0x99, 0x6f, 0xb9, 0x24, 0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c,
0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55, 0xaa, 0xbb };
size_t expected_size = PSA_HASH_SIZE( alg );
size_t expected_size = PSA_HASH_LENGTH( alg );
psa_hash_operation_t operation = PSA_HASH_OPERATION_INIT;
PSA_ASSERT( psa_crypto_init( ) );
@ -2815,7 +2815,7 @@ void hash_finish_bad_args( )
{
psa_algorithm_t alg = PSA_ALG_SHA_256;
unsigned char hash[PSA_HASH_MAX_SIZE];
size_t expected_size = PSA_HASH_SIZE( alg );
size_t expected_size = PSA_HASH_LENGTH( alg );
psa_hash_operation_t operation = PSA_HASH_OPERATION_INIT;
size_t hash_len;
@ -3119,7 +3119,7 @@ void mac_sign( int key_type_arg,
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
uint8_t *actual_mac = NULL;
size_t mac_buffer_size =
PSA_MAC_FINAL_SIZE( key_type, PSA_BYTES_TO_BITS( key_data->len ), alg );
PSA_MAC_LENGTH( key_type, PSA_BYTES_TO_BITS( key_data->len ), alg );
size_t mac_length = 0;
const size_t output_sizes_to_test[] = {
0,
@ -3130,7 +3130,7 @@ void mac_sign( int key_type_arg,
};
TEST_ASSERT( mac_buffer_size <= PSA_MAC_MAX_SIZE );
/* We expect PSA_MAC_FINAL_SIZE to be exact. */
/* We expect PSA_MAC_LENGTH to be exact. */
TEST_ASSERT( expected_mac->len == mac_buffer_size );
PSA_ASSERT( psa_crypto_init( ) );
@ -3342,14 +3342,14 @@ void cipher_bad_order( )
psa_algorithm_t alg = PSA_ALG_CBC_PKCS7;
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT;
unsigned char iv[PSA_BLOCK_CIPHER_BLOCK_SIZE(PSA_KEY_TYPE_AES)] = { 0 };
unsigned char iv[PSA_BLOCK_CIPHER_BLOCK_LENGTH(PSA_KEY_TYPE_AES)] = { 0 };
const uint8_t key_data[] = {
0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
0xaa, 0xaa, 0xaa, 0xaa };
const uint8_t text[] = {
0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb,
0xbb, 0xbb, 0xbb, 0xbb };
uint8_t buffer[PSA_BLOCK_CIPHER_BLOCK_SIZE(PSA_KEY_TYPE_AES)] = { 0 };
uint8_t buffer[PSA_BLOCK_CIPHER_BLOCK_LENGTH(PSA_KEY_TYPE_AES)] = { 0 };
size_t length = 0;
PSA_ASSERT( psa_crypto_init( ) );
@ -3522,7 +3522,7 @@ void cipher_encrypt( int alg_arg, int key_type_arg,
}
output_buffer_size = ( (size_t) input->len +
PSA_BLOCK_CIPHER_BLOCK_SIZE( key_type ) );
PSA_BLOCK_CIPHER_BLOCK_LENGTH( key_type ) );
ASSERT_ALLOC( output, output_buffer_size );
PSA_ASSERT( psa_cipher_update( &operation,
@ -3590,7 +3590,7 @@ void cipher_encrypt_multipart( int alg_arg, int key_type_arg,
}
output_buffer_size = ( (size_t) input->len +
PSA_BLOCK_CIPHER_BLOCK_SIZE( key_type ) );
PSA_BLOCK_CIPHER_BLOCK_LENGTH( key_type ) );
ASSERT_ALLOC( output, output_buffer_size );
TEST_ASSERT( first_part_size <= input->len );
@ -3663,7 +3663,7 @@ void cipher_decrypt_multipart( int alg_arg, int key_type_arg,
}
output_buffer_size = ( (size_t) input->len +
PSA_BLOCK_CIPHER_BLOCK_SIZE( key_type ) );
PSA_BLOCK_CIPHER_BLOCK_LENGTH( key_type ) );
ASSERT_ALLOC( output, output_buffer_size );
TEST_ASSERT( first_part_size <= input->len );
@ -3734,7 +3734,7 @@ void cipher_decrypt( int alg_arg, int key_type_arg,
}
output_buffer_size = ( (size_t) input->len +
PSA_BLOCK_CIPHER_BLOCK_SIZE( key_type ) );
PSA_BLOCK_CIPHER_BLOCK_LENGTH( key_type ) );
ASSERT_ALLOC( output, output_buffer_size );
PSA_ASSERT( psa_cipher_update( &operation,
@ -3805,7 +3805,7 @@ void cipher_verify_output( int alg_arg, int key_type_arg,
&iv_length ) );
}
output1_size = ( (size_t) input->len +
PSA_BLOCK_CIPHER_BLOCK_SIZE( key_type ) );
PSA_BLOCK_CIPHER_BLOCK_LENGTH( key_type ) );
ASSERT_ALLOC( output1, output1_size );
PSA_ASSERT( psa_cipher_update( &operation1, input->x, input->len,
@ -3899,7 +3899,7 @@ void cipher_verify_output_multipart( int alg_arg,
}
output1_buffer_size = ( (size_t) input->len +
PSA_BLOCK_CIPHER_BLOCK_SIZE( key_type ) );
PSA_BLOCK_CIPHER_BLOCK_LENGTH( key_type ) );
ASSERT_ALLOC( output1, output1_buffer_size );
TEST_ASSERT( first_part_size <= input->len );
@ -5645,7 +5645,7 @@ void generate_key_rsa( int bits_arg,
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
uint8_t *exported = NULL;
size_t exported_size =
PSA_KEY_EXPORT_MAX_SIZE( PSA_KEY_TYPE_RSA_PUBLIC_KEY, bits );
PSA_EXPORT_KEY_OUTPUT_SIZE( PSA_KEY_TYPE_RSA_PUBLIC_KEY, bits );
size_t exported_length = SIZE_MAX;
uint8_t *e_read_buffer = NULL;
int is_default_public_exponent = 0;
@ -5756,7 +5756,7 @@ void persistent_key_load_key_from_storage( data_t *data,
psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
unsigned char *first_export = NULL;
unsigned char *second_export = NULL;
size_t export_size = PSA_KEY_EXPORT_MAX_SIZE( type, bits );
size_t export_size = PSA_EXPORT_KEY_OUTPUT_SIZE( type, bits );
size_t first_exported_length;
size_t second_exported_length;

8
tests/suites/test_suite_psa_crypto_driver_wrappers.function
View File

@ -326,7 +326,7 @@ void cipher_encrypt( int alg_arg, int key_type_arg,
test_driver_cipher_hooks.hits = 0;
output_buffer_size = ( (size_t) input->len +
PSA_BLOCK_CIPHER_BLOCK_SIZE( key_type ) );
PSA_BLOCK_CIPHER_BLOCK_LENGTH( key_type ) );
ASSERT_ALLOC( output, output_buffer_size );
if( mock_output_arg )
@ -418,7 +418,7 @@ void cipher_encrypt_multipart( int alg_arg, int key_type_arg,
test_driver_cipher_hooks.hits = 0;
output_buffer_size = ( (size_t) input->len +
PSA_BLOCK_CIPHER_BLOCK_SIZE( key_type ) );
PSA_BLOCK_CIPHER_BLOCK_LENGTH( key_type ) );
ASSERT_ALLOC( output, output_buffer_size );
TEST_ASSERT( first_part_size <= input->len );
@ -503,7 +503,7 @@ void cipher_decrypt_multipart( int alg_arg, int key_type_arg,
test_driver_cipher_hooks.hits = 0;
output_buffer_size = ( (size_t) input->len +
PSA_BLOCK_CIPHER_BLOCK_SIZE( key_type ) );
PSA_BLOCK_CIPHER_BLOCK_LENGTH( key_type ) );
ASSERT_ALLOC( output, output_buffer_size );
TEST_ASSERT( first_part_size <= input->len );
@ -591,7 +591,7 @@ void cipher_decrypt( int alg_arg, int key_type_arg,
test_driver_cipher_hooks.hits = 0;
output_buffer_size = ( (size_t) input->len +
PSA_BLOCK_CIPHER_BLOCK_SIZE( key_type ) );
PSA_BLOCK_CIPHER_BLOCK_LENGTH( key_type ) );
ASSERT_ALLOC( output, output_buffer_size );
if( mock_output_arg )

8
tests/suites/test_suite_psa_crypto_metadata.function
View File

@ -156,7 +156,7 @@ void mac_algorithm_core( psa_algorithm_t alg, int classification_flags,
algorithm_classification( alg, classification_flags );
/* Length */
TEST_EQUAL( length, PSA_MAC_FINAL_SIZE( key_type, key_bits, alg ) );
TEST_EQUAL( length, PSA_MAC_LENGTH( key_type, key_bits, alg ) );
exit: ;
}
@ -226,7 +226,7 @@ void hash_algorithm( int alg_arg, int length_arg )
TEST_EQUAL( PSA_ALG_HKDF_GET_HASH( hkdf_alg ), alg );
/* Hash length */
TEST_EQUAL( length, PSA_HASH_SIZE( alg ) );
TEST_EQUAL( length, PSA_HASH_LENGTH( alg ) );
TEST_ASSERT( length <= PSA_HASH_MAX_SIZE );
}
/* END_CASE */
@ -483,7 +483,7 @@ void block_cipher_key_type( int type_arg, int block_size_arg )
TEST_EQUAL( type & PSA_KEY_TYPE_CATEGORY_MASK,
PSA_KEY_TYPE_CATEGORY_SYMMETRIC );
TEST_EQUAL( PSA_BLOCK_CIPHER_BLOCK_SIZE( type ), block_size );
TEST_EQUAL( PSA_BLOCK_CIPHER_BLOCK_LENGTH( type ), block_size );
}
/* END_CASE */
@ -496,7 +496,7 @@ void stream_cipher_key_type( int type_arg )
TEST_EQUAL( type & PSA_KEY_TYPE_CATEGORY_MASK,
PSA_KEY_TYPE_CATEGORY_SYMMETRIC );
TEST_EQUAL( PSA_BLOCK_CIPHER_BLOCK_SIZE( type ), 1 );
TEST_EQUAL( PSA_BLOCK_CIPHER_BLOCK_LENGTH( type ), 1 );
}
/* END_CASE */

4
tests/suites/test_suite_psa_crypto_se_driver_hal.function
View File

@ -293,8 +293,8 @@ static psa_status_t ram_fake_generate( psa_drv_se_context_t *context,
{
psa_status_t status;
size_t required_storage =
PSA_KEY_EXPORT_MAX_SIZE( psa_get_key_type( attributes ),
psa_get_key_bits( attributes ) );
PSA_EXPORT_KEY_OUTPUT_SIZE( psa_get_key_type( attributes ),
psa_get_key_bits( attributes ) );
DRIVER_ASSERT_RETURN( *pubkey_length == 0 );
if( ! PSA_KEY_TYPE_IS_KEY_PAIR( psa_get_key_type( attributes ) ) )