68 lines
2.5 KiB
C
68 lines
2.5 KiB
C
/**
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* Internal bignum functions
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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 MBEDTLS_BIGNUM_MOD_RAW_H
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#define MBEDTLS_BIGNUM_MOD_RAW_H
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#include "common.h"
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#if defined(MBEDTLS_BIGNUM_C)
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#include "mbedtls/bignum.h"
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#endif
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/** Import X from unsigned binary data.
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*
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* This function is guaranteed to return an MPI with exactly the necessary
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* number of limbs (in particular, it does not skip 0s in the input).
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*
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* \param X The address of the MPI. The size is determined by \p m.
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* \param m The address of a modulus related to \p X.
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* \param buf The input buffer to import from.
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* \param buflen Tne length in bytes of \p buf.
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*
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* \return \c 0 if successful.
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* \return #MBEDTLS_ERR_MPI_BUFFER_TOO_SMALL if \p X isn't
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* large enough to hold the value in \p buf.
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* \return #MBEDTLS_ERR_MPI_BAD_INPUT_DATA if the external reprezentation
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* of \p m is invalid or \p X is less then \p m.
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*/
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int mbedtls_mpi_mod_raw_read( mbedtls_mpi_uint *X,
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mbedtls_mpi_mod_modulus *m,
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unsigned char *buf,
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size_t buflen );
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/** Export X into unsigned binary data.
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*
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* \param X The address of the MPI. The size is determined by \p m.
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* \param m The address of a modulus related to \p X.
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* \param buf The output buffer to import.
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* \param buflen Tne length in bytes of \p buf.
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*
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* \return \c 0 if successful.
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* \return #MBEDTLS_ERR_MPI_BUFFER_TOO_SMALL if \p buf isn't
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* large enough to hold the value of \p X.
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* \return #MBEDTLS_ERR_MPI_BAD_INPUT_DATA if the external reprezentation
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* of \p m is invalid.
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*/
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int mbedtls_mpi_mod_raw_write( mbedtls_mpi_uint *X,
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mbedtls_mpi_mod_modulus *m,
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unsigned char *buf,
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size_t buflen );
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#endif /* MBEDTLS_BIGNUM_MOD_RAW_H */
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