Bignum Mod Raw: pass endianness as a parameter
The external representation before included more than just endianness
(like reading in Mongtomery curve scalars or converting hashes to
numbers in a standard compliant way).
These are higher level concepts and are out of scope for Bignum and for
the modulus structure.
Passing endianness as a parameter is a step towards removing it from the
modulus structure.
Signed-off-by: Janos Follath <janos.follath@arm.com>
diff --git a/library/bignum_mod_raw.c b/library/bignum_mod_raw.c
index 2f49ea2..22e56b7 100644
--- a/library/bignum_mod_raw.c
+++ b/library/bignum_mod_raw.c
@@ -52,11 +52,12 @@
int mbedtls_mpi_mod_raw_read( mbedtls_mpi_uint *X,
const mbedtls_mpi_mod_modulus *m,
const unsigned char *input,
- size_t input_length )
+ size_t input_length,
+ mbedtls_mpi_mod_ext_rep ext_rep )
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- switch( m->ext_rep )
+ switch( ext_rep )
{
case MBEDTLS_MPI_MOD_EXT_REP_LE:
ret = mbedtls_mpi_core_read_le( X, m->limbs,
@@ -87,9 +88,10 @@
int mbedtls_mpi_mod_raw_write( const mbedtls_mpi_uint *A,
const mbedtls_mpi_mod_modulus *m,
unsigned char *output,
- size_t output_length )
+ size_t output_length,
+ mbedtls_mpi_mod_ext_rep ext_rep )
{
- switch( m->ext_rep )
+ switch( ext_rep )
{
case MBEDTLS_MPI_MOD_EXT_REP_LE:
return( mbedtls_mpi_core_write_le( A, m->limbs,