mirror of
https://github.com/yuzu-mirror/mbedtls.git
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91 lines
2.4 KiB
C
91 lines
2.4 KiB
C
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/*
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* Multi-precision integer library
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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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#include "common.h"
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#if defined(MBEDTLS_BIGNUM_C)
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#include <string.h>
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#include "mbedtls/error.h"
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#include "mbedtls/platform_util.h"
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#if defined(MBEDTLS_PLATFORM_C)
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#include "mbedtls/platform.h"
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#else
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#include <stdio.h>
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#include <stdlib.h>
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#define mbedtls_printf printf
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#define mbedtls_calloc calloc
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#define mbedtls_free free
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#endif
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#include "bignum_core.h"
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#include "bignum_mod_raw.h"
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#include "bignum_mod.h"
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#include "constant_time_internal.h"
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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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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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if( m->ext_rep == MBEDTLS_MPI_MOD_EXT_REP_LE )
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ret = mbedtls_mpi_core_read_le( X, m->n, buf, buflen );
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else if( m->ext_rep == MBEDTLS_MPI_MOD_EXT_REP_BE )
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ret = mbedtls_mpi_core_read_be( X, m->n, buf, buflen );
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else
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return( MBEDTLS_ERR_MPI_BAD_INPUT_DATA );
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if( ret != 0 )
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goto cleanup;
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if( !mbedtls_mpi_core_lt_ct( X, m->p, m->n ) )
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{
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ret = MBEDTLS_ERR_MPI_BAD_INPUT_DATA;
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goto cleanup;
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}
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cleanup:
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return( ret );
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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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{
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if( m->ext_rep == MBEDTLS_MPI_MOD_EXT_REP_LE )
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return mbedtls_mpi_core_write_le( X, m->n, buf, buflen );
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else if( m->ext_rep == MBEDTLS_MPI_MOD_EXT_REP_BE )
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return mbedtls_mpi_core_write_be( X, m->n, buf, buflen );
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else
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return( MBEDTLS_ERR_MPI_BAD_INPUT_DATA );
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return( 0 );
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}
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#endif /* MBEDTLS_BIGNUM_C */
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