secure_fw/partitions/crypto/crypto_aead.c

/*
 * Copyright (c) 2019-2021, Arm Limited. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 *
 */

#include <stddef.h>
#include <stdint.h>

#include "tfm_mbedcrypto_include.h"

#include "tfm_crypto_api.h"
#include "tfm_crypto_defs.h"
#include "tfm_crypto_private.h"

/*!
 * \defgroup public_psa Public functions, PSA
 *
 */

/*!@{*/
psa_status_t tfm_crypto_aead_encrypt(psa_invec in_vec[],
                                     size_t in_len,
                                     psa_outvec out_vec[],
                                     size_t out_len)
{
#ifdef TFM_CRYPTO_AEAD_MODULE_DISABLED
    return PSA_ERROR_NOT_SUPPORTED;
#else
    psa_status_t status = PSA_SUCCESS;

    CRYPTO_IN_OUT_LEN_VALIDATE(in_len, 1, 3, out_len, 0, 1);

    if ((in_vec[0].len != sizeof(struct tfm_crypto_pack_iovec))) {
        return PSA_ERROR_PROGRAMMER_ERROR;
    }

    const struct tfm_crypto_pack_iovec *iov = in_vec[0].base;
    const struct tfm_crypto_aead_pack_input *aead_pack_input = &iov->aead_in;
    psa_key_id_t key_id = iov->key_id;
    psa_algorithm_t alg = iov->alg;
    const uint8_t *nonce = aead_pack_input->nonce;
    size_t nonce_length = aead_pack_input->nonce_length;
    const uint8_t *plaintext = in_vec[1].base;
    size_t plaintext_length = in_vec[1].len;
    uint8_t *ciphertext = out_vec[0].base;
    size_t ciphertext_size = out_vec[0].len;
    const uint8_t *additional_data = in_vec[2].base;
    size_t additional_data_length = in_vec[2].len;
    mbedtls_svc_key_id_t encoded_key;

    /* Initialise ciphertext_length to zero. */
    out_vec[0].len = 0;

    status = tfm_crypto_check_handle_owner(key_id, NULL);
    if (status != PSA_SUCCESS) {
        return status;
    }

    status = tfm_crypto_encode_id_and_owner(key_id, &encoded_key);
    if (status != PSA_SUCCESS) {
        return status;
    }

    return psa_aead_encrypt(encoded_key, alg, nonce, nonce_length,
                            additional_data, additional_data_length,
                            plaintext, plaintext_length,
                            ciphertext, ciphertext_size, &out_vec[0].len);
#endif /* TFM_CRYPTO_AEAD_MODULE_DISABLED */
}

psa_status_t tfm_crypto_aead_decrypt(psa_invec in_vec[],
                                     size_t in_len,
                                     psa_outvec out_vec[],
                                     size_t out_len)
{
#ifdef TFM_CRYPTO_AEAD_MODULE_DISABLED
    return PSA_ERROR_NOT_SUPPORTED;
#else
    psa_status_t status = PSA_SUCCESS;

    CRYPTO_IN_OUT_LEN_VALIDATE(in_len, 1, 3, out_len, 0, 1);

    if ((in_vec[0].len != sizeof(struct tfm_crypto_pack_iovec))) {
        return PSA_ERROR_PROGRAMMER_ERROR;
    }

    const struct tfm_crypto_pack_iovec *iov = in_vec[0].base;
    const struct tfm_crypto_aead_pack_input *aead_pack_input = &iov->aead_in;
    psa_key_id_t key_id = iov->key_id;
    psa_algorithm_t alg = iov->alg;
    const uint8_t *nonce = aead_pack_input->nonce;
    size_t nonce_length = aead_pack_input->nonce_length;
    const uint8_t *ciphertext = in_vec[1].base;
    size_t ciphertext_length = in_vec[1].len;
    uint8_t *plaintext = out_vec[0].base;
    size_t plaintext_size = out_vec[0].len;
    const uint8_t *additional_data = in_vec[2].base;
    size_t additional_data_length = in_vec[2].len;
    mbedtls_svc_key_id_t encoded_key;

    /* Initialise plaintext_length to zero. */
    out_vec[0].len = 0;

    status = tfm_crypto_check_handle_owner(key_id, NULL);
    if (status != PSA_SUCCESS) {
        return status;
    }

    status = tfm_crypto_encode_id_and_owner(key_id, &encoded_key);
    if (status != PSA_SUCCESS) {
        return status;
    }

    return psa_aead_decrypt(encoded_key, alg, nonce, nonce_length,
                            additional_data, additional_data_length,
                            ciphertext, ciphertext_length,
                            plaintext, plaintext_size, &out_vec[0].len);
#endif /* TFM_CRYPTO_AEAD_MODULE_DISABLED */
}

psa_status_t tfm_crypto_aead_encrypt_setup(psa_invec in_vec[],
                                           size_t in_len,
                                           psa_outvec out_vec[],
                                           size_t out_len)
{
    /* FixMe: To be implemented */
    return PSA_ERROR_NOT_SUPPORTED;
}

psa_status_t tfm_crypto_aead_decrypt_setup(psa_invec in_vec[],
                                           size_t in_len,
                                           psa_outvec out_vec[],
                                           size_t out_len)
{
    /* FixMe: To be implemented */
    return PSA_ERROR_NOT_SUPPORTED;
}

psa_status_t tfm_crypto_aead_abort(psa_invec in_vec[],
                                   size_t in_len,
                                   psa_outvec out_vec[],
                                   size_t out_len)
{
    /* FixMe: To be implemented */
    return PSA_ERROR_NOT_SUPPORTED;
}

psa_status_t tfm_crypto_aead_finish(psa_invec in_vec[],
                                    size_t in_len,
                                    psa_outvec out_vec[],
                                    size_t out_len)
{
    /* FixMe: To be implemented */
    return PSA_ERROR_NOT_SUPPORTED;
}

psa_status_t tfm_crypto_aead_generate_nonce(psa_invec in_vec[],
                                            size_t in_len,
                                            psa_outvec out_vec[],
                                            size_t out_len)
{
    /* FixMe: To be implemented */
    return PSA_ERROR_NOT_SUPPORTED;
}

psa_status_t tfm_crypto_aead_set_nonce(psa_invec in_vec[],
                                       size_t in_len,
                                       psa_outvec out_vec[],
                                       size_t out_len)
{
    /* FixMe: To be implemented */
    return PSA_ERROR_NOT_SUPPORTED;
}

psa_status_t tfm_crypto_aead_set_lengths(psa_invec in_vec[],
                                         size_t in_len,
                                         psa_outvec out_vec[],
                                         size_t out_len)
{
    /* FixMe: To be implemented */
    return PSA_ERROR_NOT_SUPPORTED;
}

psa_status_t tfm_crypto_aead_update(psa_invec in_vec[],
                                    size_t in_len,
                                    psa_outvec out_vec[],
                                    size_t out_len)
{
    /* FixMe: To be implemented */
    return PSA_ERROR_NOT_SUPPORTED;
}

psa_status_t tfm_crypto_aead_update_ad(psa_invec in_vec[],
                                       size_t in_len,
                                       psa_outvec out_vec[],
                                       size_t out_len)
{
    /* FixMe: To be implemented */
    return PSA_ERROR_NOT_SUPPORTED;
}

psa_status_t tfm_crypto_aead_verify(psa_invec in_vec[],
                                    size_t in_len,
                                    psa_outvec out_vec[],
                                    size_t out_len)
{
    /* FixMe: To be implemented */
    return PSA_ERROR_NOT_SUPPORTED;
}
/*!@}*/