diff options
Diffstat (limited to 'mpi')
| -rw-r--r-- | mpi/ec.c | 18 |
1 files changed, 18 insertions, 0 deletions
@@ -1117,6 +1117,15 @@ _gcry_mpi_ec_get_affine (gcry_mpi_t x, gcry_mpi_t y, mpi_point_t point, { gcry_mpi_t z1, z2, z3; + if (!mpi_cmp_ui (point->z, 1)) + { + if (x) + mpi_set (x, point->x); + if (y) + mpi_set (y, point->y); + return 0; + } + z1 = mpi_new (0); z2 = mpi_new (0); ec_invm (z1, point->z, ctx); /* z1 = z^(-1) mod p */ @@ -1156,6 +1165,15 @@ _gcry_mpi_ec_get_affine (gcry_mpi_t x, gcry_mpi_t y, mpi_point_t point, { gcry_mpi_t z; + if (!mpi_cmp_ui (point->z, 1)) + { + if (x) + mpi_set (x, point->x); + if (y) + mpi_set (y, point->y); + return 0; + } + z = mpi_new (0); ec_invm (z, point->z, ctx); |