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73 lines
2.5 KiB
C
73 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_CORE_H
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#define MBEDTLS_BIGNUM_CORE_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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#define MPI_VALIDATE_RET( cond ) \
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MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_MPI_BAD_INPUT_DATA )
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#define MPI_VALIDATE( cond ) \
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MBEDTLS_INTERNAL_VALIDATE( cond )
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#define ciL (sizeof(mbedtls_mpi_uint)) /* chars in limb */
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#define biL (ciL << 3) /* bits in limb */
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#define biH (ciL << 2) /* half limb size */
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/*
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* Convert between bits/chars and number of limbs
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* Divide first in order to avoid potential overflows
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*/
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#define BITS_TO_LIMBS(i) ( (i) / biL + ( (i) % biL != 0 ) )
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#define CHARS_TO_LIMBS(i) ( (i) / ciL + ( (i) % ciL != 0 ) )
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size_t mbedtls_mpi_core_clz( const mbedtls_mpi_uint x );
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size_t mbedtls_mpi_core_bitlen( const mbedtls_mpi_uint *X, size_t nx );
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void mbedtls_mpi_core_bigendian_to_host( mbedtls_mpi_uint * const X,
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size_t limbs );
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int mbedtls_mpi_core_read_le( mbedtls_mpi_uint *X,
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size_t nx,
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const unsigned char *buf,
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size_t buflen );
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int mbedtls_mpi_core_read_be( mbedtls_mpi_uint *X,
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size_t nx,
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const unsigned char *buf,
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size_t buflen );
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int mbedtls_mpi_core_write_le( const mbedtls_mpi_uint *X,
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size_t nx,
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unsigned char *buf,
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size_t buflen );
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int mbedtls_mpi_core_write_be( const mbedtls_mpi_uint *X,
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size_t nx,
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unsigned char *buf,
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size_t buflen );
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#endif /* MBEDTLS_BIGNUM_CORE_H */
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