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New function mbedtls_test_read_mpi_core

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Allocate and read an MPI from a binary test argument.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine 2022-09-20 21:38:33 +02:00
parent 571576fc5c
commit 3aae4e815e
2 changed files with 40 additions and 0 deletions
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18
tests/src/helpers.c
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@ -345,6 +345,24 @@ void mbedtls_test_err_add_check( int high, int low,
#endif /* MBEDTLS_TEST_HOOKS */
#if defined(MBEDTLS_BIGNUM_C)
#include "bignum_core.h"
int mbedtls_test_read_mpi_core( mbedtls_mpi_uint **pX, size_t *plimbs,
const data_t *input )
{
/* Sanity check */
if( *pX != NULL )
return( MBEDTLS_ERR_MPI_BAD_INPUT_DATA );
*plimbs = ( input->len + sizeof( **pX ) - 1 ) / sizeof( **pX );
if( *plimbs == 0 )
return( 0 );
*pX = mbedtls_calloc( *plimbs, sizeof( **pX ) );
if( *pX == NULL )
return( MBEDTLS_ERR_MPI_ALLOC_FAILED );
return( mbedtls_mpi_core_read_be( *pX, *plimbs, input->x, input->len ) );
}
int mbedtls_test_read_mpi( mbedtls_mpi *X, const char *s )
{
/* mbedtls_mpi_read_string() currently retains leading zeros.