diff options
Diffstat (limited to 'mpi/ec.c')
| -rw-r--r-- | mpi/ec.c | 11 |
1 files changed, 7 insertions, 4 deletions
@@ -1478,10 +1478,12 @@ _gcry_mpi_ec_curve_point (gcry_mpi_point_t point, mpi_ec_t ctx) { case MPI_EC_WEIERSTRASS: { - gcry_mpi_t xxx = mpi_new (0); + gcry_mpi_t xxx; if (_gcry_mpi_ec_get_affine (x, y, point, ctx)) - return 0; + goto leave; + + xxx = mpi_new (0); /* y^2 == x^3 + a·x + b */ ec_pow2 (y, y, ctx); @@ -1502,7 +1504,7 @@ _gcry_mpi_ec_curve_point (gcry_mpi_point_t point, mpi_ec_t ctx) #define xx y /* With Montgomery curve, only X-coordinate is valid. */ if (_gcry_mpi_ec_get_affine (x, NULL, point, ctx)) - return 0; + goto leave; /* The equation is: b * y^2 == x^3 + a · x^2 + x */ /* We check if right hand is quadratic residue or not by @@ -1530,7 +1532,7 @@ _gcry_mpi_ec_curve_point (gcry_mpi_point_t point, mpi_ec_t ctx) case MPI_EC_EDWARDS: { if (_gcry_mpi_ec_get_affine (x, y, point, ctx)) - return 0; + goto leave; /* a · x^2 + y^2 - 1 - b · x^2 · y^2 == 0 */ ec_pow2 (x, x, ctx); @@ -1553,6 +1555,7 @@ _gcry_mpi_ec_curve_point (gcry_mpi_point_t point, mpi_ec_t ctx) break; } + leave: _gcry_mpi_release (w); _gcry_mpi_release (x); _gcry_mpi_release (y); |