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Allowed point at infinity, supressed ecp_double()

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Manuel Pégourié-Gonnard
2012-10-31 19:37:54 +01:00
committed by Paul Bakker
parent 1e8c8ecd95
commit 5179e463d5
2 changed files with 8 additions and 16 deletions
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21
include/polarssl/ecp.h
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@@ -38,8 +38,9 @@
*/ */
typedef struct typedef struct
{ {
mpi X; /*!< the point's X coordinate */ char is_zero; /*!< true if point at infinity */
mpi Y; /*!< the point's Y coordinate */ mpi X; /*!< the point's X coordinate */
mpi Y; /*!< the point's Y coordinate */
} }
ecp_point; ecp_point;
@@ -156,18 +157,6 @@ extern "C" {
int ecp_add( const ecp_group *grp, ecp_point *R, int ecp_add( const ecp_group *grp, ecp_point *R,
const ecp_point *P, const ecp_point *Q ); const ecp_point *P, const ecp_point *Q );
/**
* \brief Duplication: R = 2 P
*
* \param grp ECP group
* \param R Destination point
* \param P Point to double
*
* \return 0 if successful, or an POLARSSL_ERR_ECP_XXX error code
*/
int ecp_double( const ecp_group *grp, ecp_point *R,
const ecp_point *P );
/** /**
* \brief Multiplication by an integer: R = m * P * \brief Multiplication by an integer: R = m * P
* *
@@ -178,8 +167,8 @@ int ecp_double( const ecp_group *grp, ecp_point *R,
* *
* \return 0 if successful, or an POLARSSL_ERR_ECP_XXX error code * \return 0 if successful, or an POLARSSL_ERR_ECP_XXX error code
*/ */
int ecp_multiply( 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 * \brief Free the components of a point

3
library/ecp.c
View File

@@ -44,6 +44,7 @@ void ecp_point_free( ecp_point *pt )
if( pt == NULL ) if( pt == NULL )
return; return;
pt->is_zero = 1;
mpi_free( &( pt->X ) ); mpi_free( &( pt->X ) );
mpi_free( &( pt->Y ) ); mpi_free( &( pt->Y ) );
} }
@@ -62,6 +63,8 @@ void ecp_group_free( ecp_group *grp )
ecp_point_free( &( grp->G ) ); ecp_point_free( &( grp->G ) );
} }
#if defined(POLARSSL_SELF_TEST) #if defined(POLARSSL_SELF_TEST)
/* /*