132 lines
5.3 KiB
C
132 lines
5.3 KiB
C
/*
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* PSA FFDH layer on top of Mbed TLS crypto
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*/
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/*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
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*/
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#ifndef PSA_CRYPTO_FFDH_H
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#define PSA_CRYPTO_FFDH_H
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#include <psa/crypto.h>
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#include <mbedtls/dhm.h>
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/** Perform a key agreement and return the FFDH shared secret.
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*
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* \param[in] attributes The attributes of the key to use for the
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* operation.
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* \param[in] peer_key The buffer containing the key context
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* of the peer's public key.
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* \param[in] peer_key_length Size of the \p peer_key buffer in
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* bytes.
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* \param[in] key_buffer The buffer containing the private key
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* context.
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* \param[in] key_buffer_size Size of the \p key_buffer buffer in
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* bytes.
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* \param[out] shared_secret The buffer to which the shared secret
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* is to be written.
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* \param[in] shared_secret_size Size of the \p shared_secret buffer in
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* bytes.
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* \param[out] shared_secret_length On success, the number of bytes that make
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* up the returned shared secret.
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* \retval #PSA_SUCCESS
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* Success. Shared secret successfully calculated.
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* \retval #PSA_ERROR_INVALID_ARGUMENT
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* \p key_buffer_size, \p peer_key_length, \p shared_secret_size
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* do not match
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* \retval #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription
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* \retval #PSA_ERROR_CORRUPTION_DETECTED \emptydescription
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*/
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psa_status_t mbedtls_psa_ffdh_key_agreement(
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const psa_key_attributes_t *attributes,
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const uint8_t *peer_key,
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size_t peer_key_length,
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const uint8_t *key_buffer,
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size_t key_buffer_size,
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uint8_t *shared_secret,
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size_t shared_secret_size,
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size_t *shared_secret_length);
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/** Export a public key or the public part of a DH key pair in binary format.
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*
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* \param[in] attributes The attributes for the key to export.
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* \param[in] key_buffer Material or context of the key to export.
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* \param[in] key_buffer_size Size of the \p key_buffer buffer in bytes.
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* \param[out] data Buffer where the key data is to be written.
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* \param[in] data_size Size of the \p data buffer in bytes.
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* \param[out] data_length On success, the number of bytes written in
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* \p data
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*
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* \retval #PSA_SUCCESS The public key was exported successfully.
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* \retval #PSA_ERROR_BUFFER_TOO_SMALL
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* The size of \p key_buffer is too small.
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* \retval #PSA_ERROR_NOT_PERMITTED \emptydescription
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* \retval #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription
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* \retval #PSA_ERROR_CORRUPTION_DETECTED \emptydescription
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*/
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psa_status_t mbedtls_psa_ffdh_export_public_key(
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const psa_key_attributes_t *attributes,
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const uint8_t *key_buffer,
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size_t key_buffer_size,
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uint8_t *data,
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size_t data_size,
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size_t *data_length);
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/**
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* \brief Generate DH key.
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*
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* \note The signature of the function is that of a PSA driver generate_key
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* entry point.
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*
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* \param[in] attributes The attributes for the key to generate.
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* \param[out] key_buffer Buffer where the key data is to be written.
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* \param[in] key_buffer_size Size of \p key_buffer in bytes.
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* \param[out] key_buffer_length On success, the number of bytes written in
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* \p key_buffer.
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*
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* \retval #PSA_SUCCESS
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* The key was generated successfully.
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* \retval #PSA_ERROR_NOT_SUPPORTED
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* Key size in bits is invalid.
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* \retval #PSA_ERROR_BUFFER_TOO_SMALL
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* The size of \p key_buffer is too small.
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* \retval #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription
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* \retval #PSA_ERROR_CORRUPTION_DETECTED \emptydescription
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*/
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psa_status_t mbedtls_psa_ffdh_generate_key(
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const psa_key_attributes_t *attributes,
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uint8_t *key_buffer,
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size_t key_buffer_size,
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size_t *key_buffer_length);
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/**
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* \brief Import DH key.
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*
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* \note The signature of the function is that of a PSA driver import_key
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* entry point.
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*
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* \param[in] attributes The attributes for the key to import.
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* \param[in] data The buffer containing the key data in import
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* format.
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* \param[in] data_length Size of the \p data buffer in bytes.
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* \param[out] key_buffer The buffer containing the key data in output
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* format.
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* \param[in] key_buffer_size Size of the \p key_buffer buffer in bytes. This
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* size is greater or equal to \p data_length.
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* \param[out] key_buffer_length The length of the data written in \p
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* key_buffer in bytes.
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* \param[out] bits The key size in number of bits.
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*
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* \retval #PSA_SUCCESS
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* The key was generated successfully.
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* \retval #PSA_ERROR_BUFFER_TOO_SMALL
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* The size of \p key_buffer is too small.
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*/
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psa_status_t mbedtls_psa_ffdh_import_key(
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const psa_key_attributes_t *attributes,
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const uint8_t *data, size_t data_length,
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uint8_t *key_buffer, size_t key_buffer_size,
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size_t *key_buffer_length, size_t *bits);
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#endif /* PSA_CRYPTO_FFDH_H */
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