first add files

lib/Crypto/Signature/pkcs1_15.pyi

@@ -0,0 +1,17 @@
+from typing import Optional
+from typing_extensions import Protocol
+
+from Crypto.PublicKey.RSA import RsaKey
+
+class Hash(Protocol):
+    def digest(self) -> bytes: ...
+
+class PKCS115_SigScheme:
+    def __init__(self, rsa_key: RsaKey) -> None: ...
+    def can_sign(self) -> bool: ...
+    def sign(self, msg_hash: Hash) -> bytes: ...
+    def verify(self, msg_hash: Hash, signature: bytes) -> None: ...
+
+def _EMSA_PKCS1_V1_5_ENCODE(msg_hash: Hash, emLen: int, with_hash_parameters: Optional[bool]=True) -> bytes: ...
+
+def new(rsa_key: RsaKey) -> PKCS115_SigScheme: ...