0ded631879
Extract functions declared in bignum_mod_raw.h into a source file with a matching name. We are doing this because: - This is a general best practice/convention - We hope that this will make resolving merge conflicts in the future easier - Having them in a unified source file is a premature optimisation at this point Signed-off-by: Janos Follath <janos.follath@arm.com>
90 lines
2.4 KiB
C
90 lines
2.4 KiB
C
/*
|
|
* Multi-precision integer library
|
|
*
|
|
* Copyright The Mbed TLS Contributors
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
* not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include "common.h"
|
|
|
|
#if defined(MBEDTLS_BIGNUM_C)
|
|
|
|
#include <string.h>
|
|
|
|
#include "mbedtls/error.h"
|
|
#include "mbedtls/platform_util.h"
|
|
|
|
#if defined(MBEDTLS_PLATFORM_C)
|
|
#include "mbedtls/platform.h"
|
|
#else
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#define mbedtls_printf printf
|
|
#define mbedtls_calloc calloc
|
|
#define mbedtls_free free
|
|
#endif
|
|
|
|
#include "bignum_core.h"
|
|
#include "bignum_mod_raw.h"
|
|
#include "bignum_mod.h"
|
|
#include "constant_time_internal.h"
|
|
|
|
int mbedtls_mpi_mod_raw_read( mbedtls_mpi_uint *X,
|
|
mbedtls_mpi_mod_modulus *m,
|
|
unsigned char *buf,
|
|
size_t buflen )
|
|
{
|
|
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
|
|
|
|
if( m->ext_rep == MBEDTLS_MPI_MOD_EXT_REP_LE )
|
|
ret = mbedtls_mpi_core_read_le( X, m->n, buf, buflen );
|
|
|
|
else if( m->ext_rep == MBEDTLS_MPI_MOD_EXT_REP_BE )
|
|
ret = mbedtls_mpi_core_read_be( X, m->n, buf, buflen );
|
|
else
|
|
return( MBEDTLS_ERR_MPI_BAD_INPUT_DATA );
|
|
|
|
if( ret != 0 )
|
|
goto cleanup;
|
|
|
|
if( !mbedtls_mpi_core_lt_ct( X, m->p, m->n ) )
|
|
{
|
|
ret = MBEDTLS_ERR_MPI_BAD_INPUT_DATA;
|
|
goto cleanup;
|
|
}
|
|
|
|
cleanup:
|
|
|
|
return( ret );
|
|
}
|
|
|
|
int mbedtls_mpi_mod_raw_write( mbedtls_mpi_uint *X,
|
|
mbedtls_mpi_mod_modulus *m,
|
|
unsigned char *buf,
|
|
size_t buflen )
|
|
{
|
|
if( m->ext_rep == MBEDTLS_MPI_MOD_EXT_REP_LE )
|
|
return mbedtls_mpi_core_write_le( X, m->n, buf, buflen );
|
|
|
|
else if( m->ext_rep == MBEDTLS_MPI_MOD_EXT_REP_BE )
|
|
return mbedtls_mpi_core_write_be( X, m->n, buf, buflen );
|
|
|
|
else
|
|
return( MBEDTLS_ERR_MPI_BAD_INPUT_DATA );
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
#endif /* MBEDTLS_BIGNUM_C */
|