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Added ecp_copy() (for points)

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Manuel Pégourié-Gonnard 2012-11-02 09:40:25 +01:00 committed by Paul Bakker
parent 5179e463d5
commit 883f313516
2 changed files with 40 additions and 15 deletions
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31
include/polarssl/ecp.h
View file

@ -33,6 +33,7 @@
* ECP Error codes * ECP Error codes
*/ */
/** /**
* \brief ECP point structure (affine coordinates) * \brief ECP point structure (affine coordinates)
*/ */
@ -144,6 +145,26 @@ ecp_group;
extern "C" { extern "C" {
#endif #endif
/**
* \brief Free the components of a point
*/
void ecp_point_free( ecp_point *pt );
/**
* \brief Free the components of an ECP group
*/
void ecp_group_free( ecp_group *grp );
/**
* \brief Copy the contents of point Q into P
*
* \param P Destination point
* \param Q Source point
*
* \return 0 if successful, or an POLARSSL_ERR_ECP_XXX error code
*/
int ecp_copy( ecp_point *P, const ecp_point *Q );
/** /**
* \brief Addition: R = P + Q * \brief Addition: R = P + Q
* *
@ -170,16 +191,6 @@ int ecp_add( const ecp_group *grp, ecp_point *R,
int ecp_mul( const ecp_group *grp, ecp_point *R, int ecp_mul( const ecp_group *grp, ecp_point *R,
const mpi *m, const ecp_point *P ); const mpi *m, const ecp_point *P );
/**
* \brief Free the components of a point
*/
void ecp_point_free( ecp_point *pt );
/**
* \brief Free the components of an ECP group
*/
void ecp_group_free( ecp_group *grp );
/** /**
* \brief Checkup routine * \brief Checkup routine
* *

24
library/ecp.c
View file

@ -26,7 +26,7 @@
/* /*
* References: * References:
* *
* SEC1-v2 (XXX: insert url) * SEC1 http://www.secg.org/index.php?action=secg,docs_secg
* Guide to Elliptic Curve Cryptography - Hankerson, Menezes, Vanstone * Guide to Elliptic Curve Cryptography - Hankerson, Menezes, Vanstone
*/ */
@ -57,12 +57,26 @@ void ecp_group_free( ecp_group *grp )
if( grp == NULL ) if( grp == NULL )
return; return;
mpi_free( &( grp->P ) ); mpi_free( &grp->P );
mpi_free( &( grp->B ) ); mpi_free( &grp->B );
mpi_free( &( grp->N ) ); ecp_point_free( &grp->G );
ecp_point_free( &( grp->G ) ); mpi_free( &grp->N );
} }
/*
* Copy the contents of Q into P
*/
int ecp_copy( ecp_point *P, const ecp_point *Q )
{
int ret;
P->is_zero = Q->is_zero;
MPI_CHK( mpi_copy( &P->X, &Q->X ) );
MPI_CHK( mpi_copy( &P->Y, &Q->Y ) );
cleanup:
return( ret );
}
#if defined(POLARSSL_SELF_TEST) #if defined(POLARSSL_SELF_TEST)