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bignum_mod: Refactored mbedtls_mpi_mod_read/write()

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This patch adjusts the I/O methods and the tests.
Documentation has also been updated to be more clear.

Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
This commit is contained in:
Minos Galanakis
2022-11-24 11:04:11 +00:00
committed by Janos Follath
parent aed832ac16
commit 8b375451c5
3 changed files with 29 additions and 35 deletions
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19
library/bignum_mod.h
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@@ -177,8 +177,9 @@ void mbedtls_mpi_mod_modulus_free( mbedtls_mpi_mod_modulus *m );
/** Read public representation data stored in a buffer into a residue structure.
*
* The `mbedtls_mpi_mod_residue` and `mbedtls_mpi_mod_modulus` structures must
* be compatible. The data will be automatically converted into the appropriate
* representation based on the value of `m->int_rep field`.
* be compatible (Data in public representation is assumed to be in the m->ext_rep
* and will be padded to m->limbs). The data will be automatically converted
* into the appropriate internal representation based on the value of `m->int_rep`.
*
* \param r The address of the residue related to \p m. It must have as
* many limbs as the modulus \p m.
@@ -193,15 +194,17 @@ void mbedtls_mpi_mod_modulus_free( mbedtls_mpi_mod_modulus *m );
* of \p m is invalid or \p X is not less than \p m.
*/
int mbedtls_mpi_mod_read( mbedtls_mpi_mod_residue *r,
mbedtls_mpi_mod_modulus *m,
unsigned char *buf,
const mbedtls_mpi_mod_modulus *m,
const unsigned char *buf,
size_t buflen );
/** Write residue data onto a buffer using public representation data.
*
* The `mbedtls_mpi_mod_residue` and `mbedtls_mpi_mod_modulus` structures must
* be compatible. The data will be automatically converted into the appropriate
* representation based on the value of `m->int_rep field`.
* be compatible (Data will be exported onto the bufer using the m->ext_rep
* and will be read as of m->limbs length).The data will be automatically
* converted from the appropriate internal representation based on the
* value of `m->int_rep field`.
*
* \param r The address of the residue related to \p m. It must have as
* many limbs as the modulus \p m.
@@ -215,8 +218,8 @@ int mbedtls_mpi_mod_read( mbedtls_mpi_mod_residue *r,
* \return #MBEDTLS_ERR_MPI_BAD_INPUT_DATA if the external representation
* of \p m is invalid.
*/
int mbedtls_mpi_mod_write( mbedtls_mpi_mod_residue *r,
mbedtls_mpi_mod_modulus *m,
int mbedtls_mpi_mod_write( const mbedtls_mpi_mod_residue *r,
const mbedtls_mpi_mod_modulus *m,
unsigned char *buf,
size_t buflen );
/* END MERGE SLOT 7 */