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77 lines
3.3 KiB
C
77 lines
3.3 KiB
C
/**
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* \file ssl_invasive.h
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*
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* \brief SSL module: interfaces for invasive testing only.
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*
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* The interfaces in this file are intended for testing purposes only.
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* They SHOULD NOT be made available in library integrations except when
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* building the library for testing.
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*/
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/*
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* Copyright (C) 2020, ARM Limited, All Rights Reserved
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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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* This file is part of mbed TLS (https://tls.mbed.org)
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*/
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#ifndef MBEDTLS_SSL_INVASIVE_H
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#define MBEDTLS_SSL_INVASIVE_H
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#include "common.h"
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#include "mbedtls/md.h"
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#if defined(MBEDTLS_TEST_HOOKS) && \
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defined(MBEDTLS_SSL_SOME_SUITES_USE_TLS_CBC)
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/** \brief Compute the HMAC of variable-length data with constant flow.
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*
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* This function computes the HMAC of the concatenation of \p add_data and \p
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* data, and does with a code flow and memory access pattern that does not
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* depend on \p data_len_secret, but only on \p min_data_len and \p
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* max_data_len. In particular, this function always reads exactly \p
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* max_data_len bytes from \p data.
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*
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* \param ctx The HMAC context. It must have keys configured
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* with mbedtls_md_hmac_starts(). It is reset using
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* mbedtls_md_hmac_reset() after the computation is
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* complete to prepare for the next computation.
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* \param add_data The additional data prepended to \p data. This
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* must point to a readable buffer of \p add_data_len
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* bytes.
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* \param add_data_len The length of \p add_data in bytes.
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* \param data The data appended to \p add_data. This must point
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* to a readable buffer of \p max_data_len bytes.
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* \param data_len_secret The length of the data to process in \p data.
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* This must be no less than \p min_data_len and no
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* greated than \p max_data_len.
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* \param min_data_len The minimal length of \p data in bytes.
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* \param max_data_len The maximal length of \p data in bytes.
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* \param output The HMAC will be written here. This must point to
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* a writeable buffer of sufficient size to hold the
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* HMAC value.
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*
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* \retval 0
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* Success.
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* \retval MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED
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* The hardware accelerator failed.
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*/
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int mbedtls_ssl_cf_hmac(
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mbedtls_md_context_t *ctx,
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const unsigned char *add_data, size_t add_data_len,
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const unsigned char *data, size_t data_len_secret,
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size_t min_data_len, size_t max_data_len,
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unsigned char *output );
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#endif /* MBEDTLS_TEST_HOOKS && MBEDTLS_SSL_SOME_SUITES_USE_TLS_CBC */
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#endif /* MBEDTLS_SSL_INVASIVE_H */
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