diff options
Diffstat (limited to 'src/cryptography/hazmat/backends/openssl/backend.py')
| -rw-r--r-- | src/cryptography/hazmat/backends/openssl/backend.py | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/cryptography/hazmat/backends/openssl/backend.py b/src/cryptography/hazmat/backends/openssl/backend.py index 99f6ccf6..cfe146f2 100644 --- a/src/cryptography/hazmat/backends/openssl/backend.py +++ b/src/cryptography/hazmat/backends/openssl/backend.py @@ -1383,6 +1383,26 @@ class Backend(object): return _EllipticCurvePublicKey(self, ec_cdata, evp_pkey) + def load_elliptic_curve_public_bytes(self, curve, point_bytes): + ec_cdata = self._ec_key_new_by_curve(curve) + group = self._lib.EC_KEY_get0_group(ec_cdata) + self.openssl_assert(group != self._ffi.NULL) + point = self._lib.EC_POINT_new(group) + self.openssl_assert(point != self._ffi.NULL) + point = self._ffi.gc(point, self._lib.EC_POINT_free) + with self._tmp_bn_ctx() as bn_ctx: + res = self._lib.EC_POINT_oct2point( + group, point, point_bytes, len(point_bytes), bn_ctx + ) + if res != 1: + self._consume_errors() + raise ValueError("Invalid public bytes for the given curve") + + res = self._lib.EC_KEY_set_public_key(ec_cdata, point) + self.openssl_assert(res == 1) + evp_pkey = self._ec_cdata_to_evp_pkey(ec_cdata) + return _EllipticCurvePublicKey(self, ec_cdata, evp_pkey) + def derive_elliptic_curve_private_key(self, private_value, curve): ec_cdata = self._ec_key_new_by_curve(curve) |