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Bignum Mod: remove endianness from modulus

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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.

Signed-off-by: Janos Follath <janos.follath@arm.com>
This commit is contained in:
Janos Follath
2022-11-24 18:20:26 +00:00
parent 3e3fc91c33
commit 91295d2b8f
5 changed files with 15 additions and 53 deletions
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14
library/bignum_mod.c
View File

@ -65,7 +65,6 @@ void mbedtls_mpi_mod_modulus_init( mbedtls_mpi_mod_modulus *m )
m->p = NULL;
m->limbs = 0;
m->bits = 0;
m->ext_rep = MBEDTLS_MPI_MOD_EXT_REP_INVALID;
m->int_rep = MBEDTLS_MPI_MOD_REP_INVALID;
}
@ -96,7 +95,6 @@ void mbedtls_mpi_mod_modulus_free( mbedtls_mpi_mod_modulus *m )
m->p = NULL;
m->limbs = 0;
m->bits = 0;
m->ext_rep = MBEDTLS_MPI_MOD_EXT_REP_INVALID;
m->int_rep = MBEDTLS_MPI_MOD_REP_INVALID;
}
@ -138,7 +136,6 @@ cleanup:
int mbedtls_mpi_mod_modulus_setup( mbedtls_mpi_mod_modulus *m,
const mbedtls_mpi_uint *p,
size_t p_limbs,
mbedtls_mpi_mod_ext_rep ext_rep,
mbedtls_mpi_mod_rep_selector int_rep )
{
int ret = 0;
@ -147,17 +144,6 @@ int mbedtls_mpi_mod_modulus_setup( mbedtls_mpi_mod_modulus *m,
m->limbs = p_limbs;
m->bits = mbedtls_mpi_core_bitlen( p, p_limbs );
switch( ext_rep )
{
case MBEDTLS_MPI_MOD_EXT_REP_LE:
case MBEDTLS_MPI_MOD_EXT_REP_BE:
m->ext_rep = ext_rep;
break;
default:
ret = MBEDTLS_ERR_MPI_BAD_INPUT_DATA;
goto exit;
}
switch( int_rep )
{
case MBEDTLS_MPI_MOD_REP_MONTGOMERY:

4
library/bignum_mod.h
View File

@ -64,7 +64,6 @@ typedef struct {
const mbedtls_mpi_uint *p;
size_t limbs; // number of limbs
size_t bits; // bitlen of p
mbedtls_mpi_mod_ext_rep ext_rep; // signals external representation (eg. byte order)
mbedtls_mpi_mod_rep_selector int_rep; // selector to signal the active member of the union
union rep
{
@ -122,8 +121,6 @@ void mbedtls_mpi_mod_modulus_init( mbedtls_mpi_mod_modulus *m );
* not be modified in any way until after
* mbedtls_mpi_mod_modulus_free() is called.
* \param p_limbs The number of limbs of \p p.
* \param ext_rep The external representation to be used for residues
* associated with \p m (see #mbedtls_mpi_mod_ext_rep).
* \param int_rep The internal representation to be used for residues
* associated with \p m (see #mbedtls_mpi_mod_rep_selector).
*
@ -134,7 +131,6 @@ void mbedtls_mpi_mod_modulus_init( mbedtls_mpi_mod_modulus *m );
int mbedtls_mpi_mod_modulus_setup( mbedtls_mpi_mod_modulus *m,
const mbedtls_mpi_uint *p,
size_t p_limbs,
mbedtls_mpi_mod_ext_rep ext_rep,
mbedtls_mpi_mod_rep_selector int_rep );
/** Free elements of a modulus structure.