diff options
Diffstat (limited to 'mpi/ec.c')
| -rw-r--r-- | mpi/ec.c | 111 |
1 files changed, 111 insertions, 0 deletions
@@ -62,6 +62,33 @@ struct mpi_ec_ctx_s }; +/* Create a new point option. NBITS gives the size in bits of one + coordinate; it is only used to pre-allocate some resources and + might also be passed as 0 to use a default value. */ +mpi_point_t +gcry_mpi_point_new (unsigned int nbits) +{ + mpi_point_t p; + + (void)nbits; /* Currently not used. */ + + p = gcry_xmalloc (sizeof *p); + _gcry_mpi_point_init (p); + return p; +} + + +/* Release the point object P. P may be NULL. */ +void +gcry_mpi_point_release (mpi_point_t p) +{ + if (p) + { + _gcry_mpi_point_free_parts (p); + gcry_free (p); + } +} + /* Initialize the fields of a point object. gcry_mpi_point_free_parts may be used to release the fields. */ @@ -93,6 +120,90 @@ point_set (mpi_point_t d, mpi_point_t s) mpi_set (d->z, s->z); } +/* Set the projective coordinates from POINT into X, Y, and Z. If a + coordinate is not required, X, Y, or Z may be passed as NULL. */ +void +gcry_mpi_point_get (gcry_mpi_t x, gcry_mpi_t y, gcry_mpi_t z, + mpi_point_t point) +{ + if (x) + mpi_set (x, point->x); + if (y) + mpi_set (y, point->y); + if (z) + mpi_set (z, point->z); +} + + +/* Set the projective coordinates from POINT into X, Y, and Z and + release POINT. If a coordinate is not required, X, Y, or Z may be + passed as NULL. */ +void +gcry_mpi_point_snatch_get (gcry_mpi_t x, gcry_mpi_t y, gcry_mpi_t z, + mpi_point_t point) +{ + mpi_snatch (x, point->x); + mpi_snatch (y, point->y); + mpi_snatch (z, point->z); + gcry_free (point); +} + + +/* Set the projective coordinates from X, Y, and Z into POINT. If a + coordinate is given as NULL, the value 0 is stored into point. If + POINT is given as NULL a new point object is allocated. Returns + POINT or the newly allocated point object. */ +mpi_point_t +gcry_mpi_point_set (mpi_point_t point, + gcry_mpi_t x, gcry_mpi_t y, gcry_mpi_t z) +{ + if (!point) + point = gcry_mpi_point_new (0); + + if (x) + mpi_set (point->x, x); + else + mpi_clear (point->x); + if (y) + mpi_set (point->y, y); + else + mpi_clear (point->y); + if (z) + mpi_set (point->z, z); + else + mpi_clear (point->z); + + return point; +} + + +/* Set the projective coordinates from X, Y, and Z into POINT. If a + coordinate is given as NULL, the value 0 is stored into point. If + POINT is given as NULL a new point object is allocated. The + coordinates X, Y, and Z are released. Returns POINT or the newly + allocated point object. */ +mpi_point_t +gcry_mpi_point_snatch_set (mpi_point_t point, + gcry_mpi_t x, gcry_mpi_t y, gcry_mpi_t z) +{ + if (!point) + point = gcry_mpi_point_new (0); + + if (x) + mpi_snatch (point->x, x); + else + mpi_clear (point->x); + if (y) + mpi_snatch (point->y, y); + else + mpi_clear (point->y); + if (z) + mpi_snatch (point->z, z); + else + mpi_clear (point->z); + + return point; +} static void |