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512 lines
24 KiB
C
512 lines
24 KiB
C
/*
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* PSA AEAD driver entry points
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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
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef PSA_CRYPTO_AEAD_H
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#define PSA_CRYPTO_AEAD_H
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#include <psa/crypto.h>
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/**
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* \brief Process an authenticated encryption operation.
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*
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* \note The signature of this function is that of a PSA driver
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* aead_encrypt entry point. This function behaves as an aead_encrypt
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* entry point as defined in the PSA driver interface specification for
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* transparent drivers.
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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] key_buffer The buffer containing the key context.
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* \param key_buffer_size Size of the \p key_buffer buffer in bytes.
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* \param alg The AEAD algorithm to compute.
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* \param[in] nonce Nonce or IV to use.
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* \param nonce_length Size of the nonce buffer in bytes. This must
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* be appropriate for the selected algorithm.
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* The default nonce size is
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* PSA_AEAD_NONCE_LENGTH(key_type, alg) where
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* key_type is the type of key.
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* \param[in] additional_data Additional data that will be authenticated
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* but not encrypted.
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* \param additional_data_length Size of additional_data in bytes.
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* \param[in] plaintext Data that will be authenticated and encrypted.
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* \param plaintext_length Size of plaintext in bytes.
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* \param[out] ciphertext Output buffer for the authenticated and
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* encrypted data. The additional data is not
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* part of this output. For algorithms where the
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* encrypted data and the authentication tag are
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* defined as separate outputs, the
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* authentication tag is appended to the
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* encrypted data.
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* \param ciphertext_size Size of the ciphertext buffer in bytes. This
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* must be appropriate for the selected algorithm
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* and key:
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* - A sufficient output size is
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* PSA_AEAD_ENCRYPT_OUTPUT_SIZE(key_type, alg,
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* plaintext_length) where key_type is the type
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* of key.
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* - PSA_AEAD_ENCRYPT_OUTPUT_MAX_SIZE(
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* plaintext_length) evaluates to the maximum
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* ciphertext size of any supported AEAD
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* encryption.
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* \param[out] ciphertext_length On success, the size of the output in the
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* ciphertext buffer.
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*
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* \retval #PSA_SUCCESS Success.
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* \retval #PSA_ERROR_NOT_SUPPORTED
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* \p alg is not supported.
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* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
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* \retval #PSA_ERROR_BUFFER_TOO_SMALL
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* ciphertext_size is too small.
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* \retval #PSA_ERROR_CORRUPTION_DETECTED
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*/
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psa_status_t mbedtls_psa_aead_encrypt(
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const psa_key_attributes_t *attributes,
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const uint8_t *key_buffer, size_t key_buffer_size,
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psa_algorithm_t alg,
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const uint8_t *nonce, size_t nonce_length,
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const uint8_t *additional_data, size_t additional_data_length,
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const uint8_t *plaintext, size_t plaintext_length,
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uint8_t *ciphertext, size_t ciphertext_size, size_t *ciphertext_length );
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/**
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* \brief Process an authenticated decryption operation.
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*
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* \note The signature of this function is that of a PSA driver
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* aead_decrypt entry point. This function behaves as an aead_decrypt
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* entry point as defined in the PSA driver interface specification for
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* transparent drivers.
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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] key_buffer The buffer containing the key context.
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* \param key_buffer_size Size of the \p key_buffer buffer in bytes.
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* \param alg The AEAD algorithm to compute.
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* \param[in] nonce Nonce or IV to use.
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* \param nonce_length Size of the nonce buffer in bytes. This must
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* be appropriate for the selected algorithm.
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* The default nonce size is
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* PSA_AEAD_NONCE_LENGTH(key_type, alg) where
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* key_type is the type of key.
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* \param[in] additional_data Additional data that has been authenticated
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* but not encrypted.
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* \param additional_data_length Size of additional_data in bytes.
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* \param[in] ciphertext Data that has been authenticated and
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* encrypted. For algorithms where the encrypted
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* data and the authentication tag are defined
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* as separate inputs, the buffer contains
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* encrypted data followed by the authentication
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* tag.
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* \param ciphertext_length Size of ciphertext in bytes.
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* \param[out] plaintext Output buffer for the decrypted data.
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* \param plaintext_size Size of the plaintext buffer in bytes. This
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* must be appropriate for the selected algorithm
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* and key:
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* - A sufficient output size is
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* PSA_AEAD_DECRYPT_OUTPUT_SIZE(key_type, alg,
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* ciphertext_length) where key_type is the
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* type of key.
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* - PSA_AEAD_DECRYPT_OUTPUT_MAX_SIZE(
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* ciphertext_length) evaluates to the maximum
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* plaintext size of any supported AEAD
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* decryption.
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* \param[out] plaintext_length On success, the size of the output in the
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* plaintext buffer.
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*
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* \retval #PSA_SUCCESS Success.
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* \retval #PSA_ERROR_INVALID_SIGNATURE
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* The cipher is not authentic.
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* \retval #PSA_ERROR_NOT_SUPPORTED
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* \p alg is not supported.
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* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
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* \retval #PSA_ERROR_BUFFER_TOO_SMALL
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* plaintext_size is too small.
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* \retval #PSA_ERROR_CORRUPTION_DETECTED
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*/
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psa_status_t mbedtls_psa_aead_decrypt(
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const psa_key_attributes_t *attributes,
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const uint8_t *key_buffer, size_t key_buffer_size,
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psa_algorithm_t alg,
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const uint8_t *nonce, size_t nonce_length,
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const uint8_t *additional_data, size_t additional_data_length,
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const uint8_t *ciphertext, size_t ciphertext_length,
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uint8_t *plaintext, size_t plaintext_size, size_t *plaintext_length );
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/** Set the key for a multipart authenticated encryption operation.
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*
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* \note The signature of this function is that of a PSA driver
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* aead_encrypt_setup entry point. This function behaves as an
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* aead_encrypt_setup entry point as defined in the PSA driver interface
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* specification for transparent drivers.
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*
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* If an error occurs at any step after a call to
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* mbedtls_psa_aead_encrypt_setup(), the operation is reset by the PSA core by a
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* call to mbedtls_psa_aead_abort(). The PSA core may call
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* mbedtls_psa_aead_abort() at any time after the operation has been
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* initialized, and is required to when the operation is no longer needed.
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*
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* \param[in,out] operation The operation object to set up. It must have
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* been initialized as per the documentation for
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* #mbedtls_psa_aead_operation_t and not yet in
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* use.
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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] key_buffer The buffer containing the key context.
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* \param key_buffer_size Size of the \p key_buffer buffer in bytes.
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It must be consistent with the size in bits
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recorded in \p attributes.
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* \param alg The AEAD algorithm to compute
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* (\c PSA_ALG_XXX value such that
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* #PSA_ALG_IS_AEAD(\p alg) is true).
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*
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* \retval #PSA_SUCCESS
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* Success.
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* \retval #PSA_ERROR_INVALID_ARGUMENT
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* An invalid block length was supplied.
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* \retval #PSA_ERROR_NOT_SUPPORTED
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* \p alg is not supported.
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* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
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* Failed to allocate memory for key material
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*/
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psa_status_t mbedtls_psa_aead_encrypt_setup(
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mbedtls_psa_aead_operation_t *operation,
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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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psa_algorithm_t alg );
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/** Set the key for a multipart authenticated decryption operation.
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*
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* \note The signature of this function is that of a PSA driver
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* aead_decrypt_setup entry point. This function behaves as an
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* aead_decrypt_setup entry point as defined in the PSA driver interface
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* specification for transparent drivers.
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*
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* If an error occurs at any step after a call to
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* mbedtls_psa_aead_decrypt_setup(), the PSA core resets the operation by a
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* call to mbedtls_psa_aead_abort(). The PSA core may call
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* mbedtls_psa_aead_abort() at any time after the operation has been
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* initialized, and is required to when the operation is no longer needed.
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*
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* \param[in,out] operation The operation object to set up. It must have
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* been initialized as per the documentation for
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* #mbedtls_psa_aead_operation_t and not yet in
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* use.
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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] key_buffer The buffer containing the key context.
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* \param key_buffer_size Size of the \p key_buffer buffer in bytes.
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It must be consistent with the size in bits
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recorded in \p attributes.
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* \param alg The AEAD algorithm to compute
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* (\c PSA_ALG_XXX value such that
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* #PSA_ALG_IS_AEAD(\p alg) is true).
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*
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* \retval #PSA_SUCCESS
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* Success.
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* \retval #PSA_ERROR_INVALID_ARGUMENT
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* An invalid block length was supplied.
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* \retval #PSA_ERROR_NOT_SUPPORTED
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* \p alg is not supported.
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* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
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* Failed to allocate memory for key material
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*/
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psa_status_t mbedtls_psa_aead_decrypt_setup(
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mbedtls_psa_aead_operation_t *operation,
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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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psa_algorithm_t alg );
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/** Set the nonce for an authenticated encryption or decryption operation.
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*
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* \note The signature of this function is that of a PSA driver aead_set_nonce
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* entry point. This function behaves as an aead_set_nonce entry point as
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* defined in the PSA driver interface specification for transparent
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* drivers.
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*
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* This function sets the nonce for the authenticated
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* encryption or decryption operation.
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*
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* The PSA core calls mbedtls_psa_aead_encrypt_setup() or
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* mbedtls_psa_aead_decrypt_setup() before calling this function.
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*
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* If this function returns an error status, the PSA core will call
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* mbedtls_psa_aead_abort().
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*
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* \param[in,out] operation Active AEAD operation.
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* \param[in] nonce Buffer containing the nonce to use.
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* \param nonce_length Size of the nonce in bytes.
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*
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* \retval #PSA_SUCCESS
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* Success.
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* \retval #PSA_ERROR_INVALID_ARGUMENT
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* The size of \p nonce is not acceptable for the chosen algorithm.
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* \retval #PSA_ERROR_NOT_SUPPORTED
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* Algorithm previously set is not supported in this configuration of
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* the library.
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*/
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psa_status_t mbedtls_psa_aead_set_nonce(
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mbedtls_psa_aead_operation_t *operation,
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const uint8_t *nonce,
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size_t nonce_length );
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/** Declare the lengths of the message and additional data for AEAD.
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*
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* \note The signature of this function is that of a PSA driver aead_set_lengths
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* entry point. This function behaves as an aead_set_lengths entry point
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* as defined in the PSA driver interface specification for transparent
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* drivers.
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*
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* The PSA core calls this function before calling mbedtls_psa_aead_update_ad()
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* or mbedtls_psa_aead_update() if the algorithm for the operation requires it.
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* If the algorithm does not require it, calling this function is optional, but
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* if this function is called then the implementation must enforce the lengths.
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*
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* The PSA core may call this function before or after setting the nonce with
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* mbedtls_psa_aead_set_nonce().
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*
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* - For #PSA_ALG_CCM, calling this function is required.
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* - For the other AEAD algorithms defined in this specification, calling
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* this function is not required.
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*
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* If this function returns an error status, the PSA core calls
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* mbedtls_psa_aead_abort().
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*
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* \param[in,out] operation Active AEAD operation.
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* \param ad_length Size of the non-encrypted additional
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* authenticated data in bytes.
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* \param plaintext_length Size of the plaintext to encrypt in bytes.
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*
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* \retval #PSA_SUCCESS
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* Success.
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* \retval #PSA_ERROR_INVALID_ARGUMENT
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* At least one of the lengths is not acceptable for the chosen
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* algorithm.
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* \retval #PSA_ERROR_NOT_SUPPORTED
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* Algorithm previously set is not supported in this configuration of
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* the library.
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*/
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psa_status_t mbedtls_psa_aead_set_lengths(
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mbedtls_psa_aead_operation_t *operation,
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size_t ad_length,
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size_t plaintext_length );
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/** Pass additional data to an active AEAD operation.
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*
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* \note The signature of this function is that of a PSA driver
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* aead_update_ad entry point. This function behaves as an aead_update_ad
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* entry point as defined in the PSA driver interface specification for
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* transparent drivers.
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*
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* Additional data is authenticated, but not encrypted.
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*
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* The PSA core can call this function multiple times to pass successive
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* fragments of the additional data. It will not call this function after
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* passing data to encrypt or decrypt with mbedtls_psa_aead_update().
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*
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* Before calling this function, the PSA core will:
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* 1. Call either mbedtls_psa_aead_encrypt_setup() or
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* mbedtls_psa_aead_decrypt_setup().
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* 2. Set the nonce with mbedtls_psa_aead_set_nonce().
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*
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* If this function returns an error status, the PSA core will call
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* mbedtls_psa_aead_abort().
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*
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* \param[in,out] operation Active AEAD operation.
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* \param[in] input Buffer containing the fragment of
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* additional data.
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* \param input_length Size of the \p input buffer in bytes.
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*
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* \retval #PSA_SUCCESS
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* Success.
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* \retval #PSA_ERROR_NOT_SUPPORTED
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* Algorithm previously set is not supported in this configuration of
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* the library.
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*/
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psa_status_t mbedtls_psa_aead_update_ad(
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mbedtls_psa_aead_operation_t *operation,
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const uint8_t *input,
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size_t input_length );
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/** Encrypt or decrypt a message fragment in an active AEAD operation.
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*
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* \note The signature of this function is that of a PSA driver
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* aead_update entry point. This function behaves as an aead_update entry
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* point as defined in the PSA driver interface specification for
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* transparent drivers.
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*
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* Before calling this function, the PSA core will:
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* 1. Call either mbedtls_psa_aead_encrypt_setup() or
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* mbedtls_psa_aead_decrypt_setup(). The choice of setup function
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* determines whether this function encrypts or decrypts its input.
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* 2. Set the nonce with mbedtls_psa_aead_set_nonce().
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* 3. Call mbedtls_psa_aead_update_ad() to pass all the additional data.
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*
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* If this function returns an error status, the PSA core will call
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* mbedtls_psa_aead_abort().
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*
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* This function does not require the input to be aligned to any
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* particular block boundary. If the implementation can only process
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* a whole block at a time, it must consume all the input provided, but
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* it may delay the end of the corresponding output until a subsequent
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* call to mbedtls_psa_aead_update(), mbedtls_psa_aead_finish() provides
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* sufficient input. The amount of data that can be delayed in this way is
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* bounded by #PSA_AEAD_UPDATE_OUTPUT_SIZE.
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*
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* \param[in,out] operation Active AEAD operation.
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* \param[in] input Buffer containing the message fragment to
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* encrypt or decrypt.
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* \param input_length Size of the \p input buffer in bytes.
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* \param[out] output Buffer where the output is to be written.
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* \param output_size Size of the \p output buffer in bytes.
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* This must be appropriate for the selected
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* algorithm and key:
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* - A sufficient output size is
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* #PSA_AEAD_UPDATE_OUTPUT_SIZE(\c key_type,
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* \c alg, \p input_length) where
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* \c key_type is the type of key and \c alg is
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* the algorithm that were used to set up the
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* operation.
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* - #PSA_AEAD_UPDATE_OUTPUT_MAX_SIZE(\p
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* input_length) evaluates to the maximum
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* output size of any supported AEAD
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* algorithm.
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* \param[out] output_length On success, the number of bytes
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* that make up the returned output.
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*
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* \retval #PSA_SUCCESS
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* Success.
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*
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* \retval #PSA_ERROR_BUFFER_TOO_SMALL
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* The size of the \p output buffer is too small.
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* #PSA_AEAD_UPDATE_OUTPUT_SIZE(\c key_type, \c alg, \p input_length) or
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* #PSA_AEAD_UPDATE_OUTPUT_MAX_SIZE(\p input_length) can be used to
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* determine the required buffer size.
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*/
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psa_status_t mbedtls_psa_aead_update(
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mbedtls_psa_aead_operation_t *operation,
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const uint8_t *input,
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size_t input_length,
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uint8_t *output,
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size_t output_size,
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size_t *output_length );
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/** Finish encrypting a message in an AEAD operation.
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*
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* \note The signature of this function is that of a PSA driver
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* aead_finish entry point. This function behaves as an aead_finish entry
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* point as defined in the PSA driver interface specification for
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* transparent drivers.
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*
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* The operation must have been set up by the PSA core with
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* mbedtls_psa_aead_encrypt_setup().
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*
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* This function finishes the authentication of the additional data
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* formed by concatenating the inputs passed to preceding calls to
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* mbedtls_psa_aead_update_ad() with the plaintext formed by concatenating the
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* inputs passed to preceding calls to mbedtls_psa_aead_update().
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*
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* This function has two output buffers:
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* - \p ciphertext contains trailing ciphertext that was buffered from
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* preceding calls to mbedtls_psa_aead_update().
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* - \p tag contains the authentication tag.
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*
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* Whether or not this function returns successfuly, the PSA core subsequently
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* calls mbedtls_psa_aead_abort() to deactivate the operation.
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*
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* \param[in,out] operation Active AEAD operation.
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* \param[out] ciphertext Buffer where the last part of the ciphertext
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* is to be written.
|
|
* \param ciphertext_size Size of the \p ciphertext buffer in bytes.
|
|
* This must be appropriate for the selected
|
|
* algorithm and key:
|
|
* - A sufficient output size is
|
|
* #PSA_AEAD_FINISH_OUTPUT_SIZE(\c key_type,
|
|
* \c alg) where \c key_type is the type of key
|
|
* and \c alg is the algorithm that were used to
|
|
* set up the operation.
|
|
* - #PSA_AEAD_FINISH_OUTPUT_MAX_SIZE evaluates to
|
|
* the maximum output size of any supported AEAD
|
|
* algorithm.
|
|
* \param[out] ciphertext_length On success, the number of bytes of
|
|
* returned ciphertext.
|
|
* \param[out] tag Buffer where the authentication tag is
|
|
* to be written.
|
|
* \param tag_size Size of the \p tag buffer in bytes.
|
|
* This must be appropriate for the selected
|
|
* algorithm and key:
|
|
* - The exact tag size is #PSA_AEAD_TAG_LENGTH(\c
|
|
* key_type, \c key_bits, \c alg) where
|
|
* \c key_type and \c key_bits are the type and
|
|
* bit-size of the key, and \c alg are the
|
|
* algorithm that were used in the call to
|
|
* mbedtls_psa_aead_encrypt_setup().
|
|
* - #PSA_AEAD_TAG_MAX_SIZE evaluates to the
|
|
* maximum tag size of any supported AEAD
|
|
* algorithm.
|
|
* \param[out] tag_length On success, the number of bytes
|
|
* that make up the returned tag.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
|
|
* The size of the \p tag buffer is too small.
|
|
* #PSA_AEAD_TAG_LENGTH(\c key_type, key_bits, \c alg) or
|
|
* #PSA_AEAD_TAG_MAX_SIZE can be used to determine the required \p tag
|
|
* buffer size.
|
|
*/
|
|
psa_status_t mbedtls_psa_aead_finish(
|
|
mbedtls_psa_aead_operation_t *operation,
|
|
uint8_t *ciphertext,
|
|
size_t ciphertext_size,
|
|
size_t *ciphertext_length,
|
|
uint8_t *tag,
|
|
size_t tag_size,
|
|
size_t *tag_length );
|
|
|
|
/** Abort an AEAD operation.
|
|
*
|
|
* \note The signature of this function is that of a PSA driver
|
|
* aead_abort entry point. This function behaves as an aead_abort entry
|
|
* point as defined in the PSA driver interface specification for
|
|
* transparent drivers.
|
|
*
|
|
* Aborting an operation frees all associated resources except for the
|
|
* \p operation structure itself. Once aborted, the operation object
|
|
* can be reused for another operation by the PSA core by it calling
|
|
* mbedtls_psa_aead_encrypt_setup() or mbedtls_psa_aead_decrypt_setup() again.
|
|
*
|
|
* The PSA core may call this function any time after the operation object has
|
|
* been initialized as described in #mbedtls_psa_aead_operation_t.
|
|
*
|
|
* In particular, calling mbedtls_psa_aead_abort() after the operation has been
|
|
* terminated by a call to mbedtls_psa_aead_abort() or
|
|
* mbedtls_psa_aead_finish() is safe and has no effect.
|
|
*
|
|
* \param[in,out] operation Initialized AEAD operation.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
*/
|
|
psa_status_t mbedtls_psa_aead_abort(
|
|
mbedtls_psa_aead_operation_t *operation );
|
|
|
|
#endif /* PSA_CRYPTO_AEAD */
|