316 lines
15 KiB
C
316 lines
15 KiB
C
/*
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* PSA cipher driver entry points and associated auxiliary functions
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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_CIPHER_H
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#define PSA_CRYPTO_CIPHER_H
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#include <mbedtls/cipher.h>
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#include <psa/crypto.h>
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/** Get Mbed TLS cipher information given the cipher algorithm PSA identifier
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* as well as the PSA type and size of the key to be used with the cipher
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* algorithm.
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*
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* \param[in] alg PSA cipher algorithm identifier
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* \param[in] key_type PSA key type
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* \param[in,out] key_bits Size of the key in bits. The value provided in input
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* might be updated if necessary.
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* \param[out] mode Mbed TLS cipher mode
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* \param[out] cipher_id Mbed TLS cipher algorithm identifier
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*
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* \return On success \c PSA_SUCCESS is returned and key_bits, mode and cipher_id
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* are properly updated.
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* \c PSA_ERROR_NOT_SUPPORTED is returned if the cipher algorithm is not
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* supported.
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*/
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psa_status_t mbedtls_cipher_values_from_psa(psa_algorithm_t alg, psa_key_type_t key_type,
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size_t *key_bits, mbedtls_cipher_mode_t *mode,
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mbedtls_cipher_id_t *cipher_id);
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#if defined(MBEDTLS_CIPHER_C)
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/** Get Mbed TLS cipher information given the cipher algorithm PSA identifier
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* as well as the PSA type and size of the key to be used with the cipher
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* algorithm.
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*
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* \param alg PSA cipher algorithm identifier
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* \param key_type PSA key type
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* \param key_bits Size of the key in bits
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* \param[out] cipher_id Mbed TLS cipher algorithm identifier
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*
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* \return The Mbed TLS cipher information of the cipher algorithm.
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* \c NULL if the PSA cipher algorithm is not supported.
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*/
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const mbedtls_cipher_info_t *mbedtls_cipher_info_from_psa(
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psa_algorithm_t alg, psa_key_type_t key_type, size_t key_bits,
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mbedtls_cipher_id_t *cipher_id);
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#endif /* MBEDTLS_CIPHER_C */
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/**
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* \brief Set the key for a multipart symmetric 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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* cipher_encrypt_setup entry point. This function behaves as a
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* cipher_encrypt_setup entry point as defined in the PSA driver
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* interface specification for transparent drivers.
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*
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* \param[in,out] operation The operation object to set up. It has been
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* initialized as per the documentation for
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* #psa_cipher_operation_t and not yet in 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[in] key_buffer_size Size of the \p key_buffer buffer in bytes.
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* \param[in] alg The cipher algorithm to compute
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* (\c PSA_ALG_XXX value such that
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* #PSA_ALG_IS_CIPHER(\p alg) is true).
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*
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* \retval #PSA_SUCCESS \emptydescription
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* \retval #PSA_ERROR_NOT_SUPPORTED \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_cipher_encrypt_setup(
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mbedtls_psa_cipher_operation_t *operation,
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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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/**
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* \brief Set the key for a multipart symmetric 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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* cipher_decrypt_setup entry point. This function behaves as a
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* cipher_decrypt_setup entry point as defined in the PSA driver
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* interface specification for transparent drivers.
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*
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* \param[in,out] operation The operation object to set up. It has been
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* initialized as per the documentation for
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* #psa_cipher_operation_t and not yet in 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[in] key_buffer_size Size of the \p key_buffer buffer in bytes.
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* \param[in] alg The cipher algorithm to compute
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* (\c PSA_ALG_XXX value such that
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* #PSA_ALG_IS_CIPHER(\p alg) is true).
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*
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* \retval #PSA_SUCCESS \emptydescription
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* \retval #PSA_ERROR_NOT_SUPPORTED \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_cipher_decrypt_setup(
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mbedtls_psa_cipher_operation_t *operation,
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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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/** Set the IV for a symmetric encryption or decryption operation.
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*
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* This function sets the IV (initialization vector), nonce
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* or initial counter value for the encryption or 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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* cipher_set_iv entry point. This function behaves as a
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* cipher_set_iv entry point as defined in the PSA driver
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* interface specification for transparent drivers.
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*
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* \param[in,out] operation Active cipher operation.
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* \param[in] iv Buffer containing the IV to use.
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* \param[in] iv_length Size of the IV in bytes. It is guaranteed by
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* the core to be less or equal to
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* PSA_CIPHER_IV_MAX_SIZE.
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*
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* \retval #PSA_SUCCESS \emptydescription
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* \retval #PSA_ERROR_INVALID_ARGUMENT
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* The size of \p iv is not acceptable for the chosen algorithm,
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* or the chosen algorithm does not use an IV.
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* \retval #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription
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*/
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psa_status_t mbedtls_psa_cipher_set_iv(
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mbedtls_psa_cipher_operation_t *operation,
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const uint8_t *iv, size_t iv_length);
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/** Encrypt or decrypt a message fragment in an active cipher 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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* cipher_update entry point. This function behaves as a
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* cipher_update entry point as defined in the PSA driver
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* interface specification for transparent drivers.
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*
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* \param[in,out] operation Active cipher 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[in] 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[in] output_size Size of the \p output buffer in bytes.
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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 \emptydescription
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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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* \retval #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription
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*/
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psa_status_t mbedtls_psa_cipher_update(
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mbedtls_psa_cipher_operation_t *operation,
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const uint8_t *input, size_t input_length,
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uint8_t *output, size_t output_size, size_t *output_length);
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/** Finish encrypting or decrypting a message in a cipher 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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* cipher_finish entry point. This function behaves as a
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* cipher_finish entry point as defined in the PSA driver
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* interface specification for transparent drivers.
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*
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* \param[in,out] operation Active cipher operation.
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* \param[out] output Buffer where the output is to be written.
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* \param[in] output_size Size of the \p output buffer in bytes.
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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 \emptydescription
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* \retval #PSA_ERROR_INVALID_ARGUMENT
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* The total input size passed to this operation is not valid for
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* this particular algorithm. For example, the algorithm is a based
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* on block cipher and requires a whole number of blocks, but the
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* total input size is not a multiple of the block size.
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* \retval #PSA_ERROR_INVALID_PADDING
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* This is a decryption operation for an algorithm that includes
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* padding, and the ciphertext does not contain valid padding.
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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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* \retval #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription
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*/
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psa_status_t mbedtls_psa_cipher_finish(
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mbedtls_psa_cipher_operation_t *operation,
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uint8_t *output, size_t output_size, size_t *output_length);
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/** Abort a cipher operation.
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*
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* Aborting an operation frees all associated resources except for the
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* \p operation structure itself. Once aborted, the operation object
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* can be reused for another 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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* cipher_abort entry point. This function behaves as a
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* cipher_abort entry point as defined in the PSA driver
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* interface specification for transparent drivers.
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*
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* \param[in,out] operation Initialized cipher operation.
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*
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* \retval #PSA_SUCCESS \emptydescription
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*/
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psa_status_t mbedtls_psa_cipher_abort(mbedtls_psa_cipher_operation_t *operation);
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/** Encrypt a message using a symmetric cipher.
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*
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* \note The signature of this function is that of a PSA driver
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* cipher_encrypt entry point. This function behaves as a
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* cipher_encrypt entry point as defined in the PSA driver
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* interface specification for 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[in] key_buffer_size Size of the \p key_buffer buffer in bytes.
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* \param[in] alg The cipher algorithm to compute
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* (\c PSA_ALG_XXX value such that
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* #PSA_ALG_IS_CIPHER(\p alg) is true).
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* \param[in] iv Buffer containing the IV for encryption. The
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* IV has been generated by the core.
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* \param[in] iv_length Size of the \p iv in bytes.
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* \param[in] input Buffer containing the message to encrypt.
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* \param[in] input_length Size of the \p input buffer in bytes.
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* \param[in,out] output Buffer where the output is to be written.
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* \param[in] output_size Size of the \p output buffer in bytes.
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* \param[out] output_length On success, the number of bytes that make up
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* the returned output. Initialized to zero
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* by the core.
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*
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* \retval #PSA_SUCCESS \emptydescription
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* \retval #PSA_ERROR_NOT_SUPPORTED \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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* \retval #PSA_ERROR_BUFFER_TOO_SMALL
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* The size of the \p output buffer is too small.
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* \retval #PSA_ERROR_INVALID_ARGUMENT
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* The size \p iv_length is not acceptable for the chosen algorithm,
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* or the chosen algorithm does not use an IV.
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* The total input size passed to this operation is not valid for
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* this particular algorithm. For example, the algorithm is a based
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* on block cipher and requires a whole number of blocks, but the
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* total input size is not a multiple of the block size.
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* \retval #PSA_ERROR_INVALID_PADDING
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* This is a decryption operation for an algorithm that includes
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* padding, and the ciphertext does not contain valid padding.
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*/
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psa_status_t mbedtls_psa_cipher_encrypt(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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const uint8_t *iv,
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size_t iv_length,
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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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/** Decrypt a message using a symmetric cipher.
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*
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* \note The signature of this function is that of a PSA driver
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* cipher_decrypt entry point. This function behaves as a
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* cipher_decrypt entry point as defined in the PSA driver
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* interface specification for 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[in] key_buffer_size Size of the \p key_buffer buffer in bytes.
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* \param[in] alg The cipher algorithm to compute
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* (\c PSA_ALG_XXX value such that
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* #PSA_ALG_IS_CIPHER(\p alg) is true).
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* \param[in] input Buffer containing the iv and the ciphertext.
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* \param[in] 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[in] output_size Size of the \p output buffer in bytes.
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* \param[out] output_length On success, the number of bytes that make up
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* the returned output. Initialized to zero
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* by the core.
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*
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* \retval #PSA_SUCCESS \emptydescription
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* \retval #PSA_ERROR_NOT_SUPPORTED \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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* \retval #PSA_ERROR_BUFFER_TOO_SMALL
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* The size of the \p output buffer is too small.
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* \retval #PSA_ERROR_INVALID_ARGUMENT
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* The size of \p iv is not acceptable for the chosen algorithm,
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* or the chosen algorithm does not use an IV.
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* The total input size passed to this operation is not valid for
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* this particular algorithm. For example, the algorithm is a based
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* on block cipher and requires a whole number of blocks, but the
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* total input size is not a multiple of the block size.
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* \retval #PSA_ERROR_INVALID_PADDING
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* This is a decryption operation for an algorithm that includes
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* padding, and the ciphertext does not contain valid padding.
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*/
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psa_status_t mbedtls_psa_cipher_decrypt(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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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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#endif /* PSA_CRYPTO_CIPHER_H */
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