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/*
* Driver entry points for p256-m
*/
/*
* Copyright The Mbed TLS Contributors
* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
*/
#ifndef P256M_DRIVER_ENTRYPOINTS_H
#define P256M_DRIVER_ENTRYPOINTS_H
#if defined(MBEDTLS_PSA_P256M_DRIVER_ENABLED)
#ifndef PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT
#define PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
#endif /* MBEDTLS_PSA_P256M_DRIVER_ENABLED */
#include "psa/crypto_types.h"
/** Import SECP256R1 key.
*
* \param[in] attributes The attributes of the key to use for the
* operation.
* \param[in] data The raw key material. For private keys
* this must be a big-endian integer of 32
* bytes; for public key this must be an
* uncompressed ECPoint (65 bytes).
* \param[in] data_length The size of the raw key material.
* \param[out] key_buffer The buffer to contain the key data in
* output format upon successful return.
* \param[in] key_buffer_size Size of the \p key_buffer buffer in bytes.
* \param[out] key_buffer_length The length of the data written in \p
* key_buffer in bytes.
* \param[out] bits The bitsize of the key.
*
* \retval #PSA_SUCCESS
* Success. Keypair generated and stored in buffer.
* \retval #PSA_ERROR_NOT_SUPPORTED
* The input is not supported by this driver (not SECP256R1).
* \retval #PSA_ERROR_INVALID_ARGUMENT
* The input is invalid.
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
* \p key_buffer_size is too small.
*/
psa_status_t p256_transparent_import_key(const psa_key_attributes_t *attributes,
const uint8_t *data,
size_t data_length,
uint8_t *key_buffer,
size_t key_buffer_size,
size_t *key_buffer_length,
size_t *bits);
/** Export SECP256R1 public key, from the private key.
*
* \param[in] attributes The attributes of the key to use for the
* operation.
* \param[in] key_buffer The private key in the export format.
* \param[in] key_buffer_size The size of the private key in bytes.
* \param[out] data The buffer to contain the public key in
* the export format upon successful return.
* \param[in] data_size The size of the \p data buffer in bytes.
* \param[out] data_length The length written to \p data in bytes.
*
* \retval #PSA_SUCCESS
* Success. Keypair generated and stored in buffer.
* \retval #PSA_ERROR_NOT_SUPPORTED
* The input is not supported by this driver (not SECP256R1).
* \retval #PSA_ERROR_INVALID_ARGUMENT
* The input is invalid.
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
* \p key_buffer_size is too small.
*/
psa_status_t p256_transparent_export_public_key(const psa_key_attributes_t *attributes,
const uint8_t *key_buffer,
size_t key_buffer_size,
uint8_t *data,
size_t data_size,
size_t *data_length);
/** Generate SECP256R1 ECC Key Pair.
* Interface function which calls the p256-m key generation function and
* places it in the key buffer provided by the caller (Mbed TLS) in the
* correct format. For a SECP256R1 curve this is the 32 bit private key.
*
* \param[in] attributes The attributes of the key to use for the
* operation.
* \param[out] key_buffer The buffer to contain the key data in
* output format upon successful return.
* \param[in] key_buffer_size Size of the \p key_buffer buffer in bytes.
* \param[out] key_buffer_length The length of the data written in \p
* key_buffer in bytes.
*
* \retval #PSA_SUCCESS
* Success. Keypair generated and stored in buffer.
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
* \p key_buffer_size is too small.
* \retval #PSA_ERROR_GENERIC_ERROR
* The internal RNG failed.
*/
psa_status_t p256_transparent_generate_key(
const psa_key_attributes_t *attributes,
uint8_t *key_buffer,
size_t key_buffer_size,
size_t *key_buffer_length);
/** Perform raw key agreement using p256-m's ECDH implementation
* \param[in] attributes The attributes of the key to use for the
* operation.
* \param[in] key_buffer The buffer containing the private key
* in the format specified by PSA.
* \param[in] key_buffer_size Size of the \p key_buffer buffer in bytes.
* \param[in] alg A key agreement algorithm that is
* compatible with the type of the key.
* \param[in] peer_key The buffer containing the peer's public
* key in format specified by PSA.
* \param[in] peer_key_length Size of the \p peer_key buffer in
* bytes.
* \param[out] shared_secret The buffer to which the shared secret
* is to be written.
* \param[in] shared_secret_size Size of the \p shared_secret buffer in
* bytes.
* \param[out] shared_secret_length On success, the number of bytes that
* make up the returned shared secret.
* \retval #PSA_SUCCESS
* Success. Shared secret successfully calculated.
* \retval #PSA_ERROR_INVALID_ARGUMENT
* The input is invalid.
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
* \p shared_secret_size is too small.
*/
psa_status_t p256_transparent_key_agreement(
const psa_key_attributes_t *attributes,
const uint8_t *key_buffer,
size_t key_buffer_size,
psa_algorithm_t alg,
const uint8_t *peer_key,
size_t peer_key_length,
uint8_t *shared_secret,
size_t shared_secret_size,
size_t *shared_secret_length);
/** Sign an already-calculated hash with a private key using p256-m's ECDSA
* implementation
* \param[in] attributes The attributes of the key to use for the
* operation.
* \param[in] key_buffer The buffer containing the private key
* in the format specified by PSA.
* \param[in] key_buffer_size Size of the \p key_buffer buffer in bytes.
* \param[in] alg A signature algorithm that is compatible
* with the type of the key.
* \param[in] hash The hash to sign.
* \param[in] hash_length Size of the \p hash buffer in bytes.
* \param[out] signature Buffer where signature is to be written.
* \param[in] signature_size Size of the \p signature buffer in bytes.
* \param[out] signature_length On success, the number of bytes
* that make up the returned signature value.
*
* \retval #PSA_SUCCESS
* Success. Hash was signed successfully.
* \retval #PSA_ERROR_INVALID_ARGUMENT
* The input is invalid.
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
* \p signature_size is too small.
* \retval #PSA_ERROR_GENERIC_ERROR
* The internal RNG failed.
*/
psa_status_t p256_transparent_sign_hash(
const psa_key_attributes_t *attributes,
const uint8_t *key_buffer,
size_t key_buffer_size,
psa_algorithm_t alg,
const uint8_t *hash,
size_t hash_length,
uint8_t *signature,
size_t signature_size,
size_t *signature_length);
/** Verify the signature of a hash using a SECP256R1 public key using p256-m's
* ECDSA implementation.
*
* \note p256-m expects a 64 byte public key, but the contents of the key
buffer may be the 32 byte keypair representation or the 65 byte
public key representation. As a result, this function calls
psa_driver_wrapper_export_public_key() to ensure the public key
can be passed to p256-m.
*
* \param[in] attributes The attributes of the key to use for the
* operation.
*
* \param[in] key_buffer The buffer containing the key
* in the format specified by PSA.
* \param[in] key_buffer_size Size of the \p key_buffer buffer in bytes.
* \param[in] alg A signature algorithm that is compatible with
* the type of the key.
* \param[in] hash The hash whose signature is to be
* verified.
* \param[in] hash_length Size of the \p hash buffer in bytes.
* \param[in] signature Buffer containing the signature to verify.
* \param[in] signature_length Size of the \p signature buffer in bytes.
*
* \retval #PSA_SUCCESS
* The signature is valid.
* \retval #PSA_ERROR_INVALID_SIGNATURE
* The calculation was performed successfully, but the passed
* signature is not a valid signature.
* \retval #PSA_ERROR_INVALID_ARGUMENT
* The input is invalid.
*/
psa_status_t p256_transparent_verify_hash(
const psa_key_attributes_t *attributes,
const uint8_t *key_buffer,
size_t key_buffer_size,
psa_algorithm_t alg,
const uint8_t *hash,
size_t hash_length,
const uint8_t *signature,
size_t signature_length);
#endif /* P256M_DRIVER_ENTRYPOINTS_H */
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