first add files

lib/Crypto/PublicKey/ElGamal.pyi

@@ -0,0 +1,18 @@
+from typing import Callable, Union, Tuple, Optional
+
+__all__ = ['generate', 'construct', 'ElGamalKey']
+
+RNG = Callable[[int], bytes]
+
+def generate(bits: int, randfunc: RNG) -> ElGamalKey: ...
+def construct(tup: Union[Tuple[int, int, int], Tuple[int, int, int, int]]) -> ElGamalKey: ...
+
+class ElGamalKey(object):
+    def __init__(self, randfunc: Optional[RNG]=None) -> None: ...
+    def has_private(self) -> bool: ...
+    def can_encrypt(self) -> bool: ...
+    def can_sign(self) -> bool: ...
+    def publickey(self) -> ElGamalKey: ...
+    def __eq__(self, other: object) -> bool: ...
+    def __ne__(self, other: object) -> bool: ...
+    def __getstate__(self) -> None: ...