63 lines
2.4 KiB
C
63 lines
2.4 KiB
C
/*
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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 MBEDTLS_SSL_TLS13_INVASIVE_H
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#define MBEDTLS_SSL_TLS13_INVASIVE_H
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#include "common.h"
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#if defined(MBEDTLS_PSA_CRYPTO_C)
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#include "psa/crypto.h"
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#endif
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#if defined(MBEDTLS_TEST_HOOKS)
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#if defined(MBEDTLS_PSA_CRYPTO_C)
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/**
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* \brief Expand the supplied \p prk into several additional pseudorandom
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* keys, which is the output of the HKDF.
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*
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* \param alg The HMAC algorithm to use (\c #PSA_ALG_HMAC( PSA_ALG_XXX )
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* value such that PSA_ALG_XXX is a hash algorithm and
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* #PSA_ALG_IS_HMAC(\p alg) is true).
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* \param prk A pseudorandom key of \p prk_len bytes. \p prk is
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* usually the output from the HKDF extract step.
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* \param prk_len The length in bytes of \p prk.
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* \param info An optional context and application specific information
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* string. This can be a zero-length string.
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* \param info_len The length of \p info in bytes.
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* \param okm The output keying material of \p okm_len bytes.
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* \param okm_len The length of the output keying material in bytes. This
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* must be less than or equal to
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* 255 * #PSA_HASH_LENGTH( \p alg ) bytes.
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*
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* \return 0 on success.
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* \return #PSA_ERROR_INVALID_ARGUMENT when the parameters are invalid.
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* \return An PSA_ERROR_* error for errors returned from the underlying
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* PSA layer.
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*/
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psa_status_t mbedtls_psa_hkdf_expand( psa_algorithm_t alg,
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const unsigned char *prk, size_t prk_len,
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const unsigned char *info, size_t info_len,
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unsigned char *okm, size_t okm_len );
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#endif /* MBEDTLS_PSA_CRYPTO_C */
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#endif /* MBEDTLS_TEST_HOOKS */
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#endif /* MBEDTLS_SSL_TLS13_INVASIVE_H */
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