structure saas with tools

.venv/lib/python3.10/site-packages/authlib/oauth1/rfc5849/rsa.py

@@ -0,0 +1,24 @@
+from cryptography.exceptions import InvalidSignature
+from cryptography.hazmat.backends import default_backend
+from cryptography.hazmat.primitives import hashes
+from cryptography.hazmat.primitives.asymmetric import padding
+from cryptography.hazmat.primitives.serialization import load_pem_private_key
+from cryptography.hazmat.primitives.serialization import load_pem_public_key
+
+from authlib.common.encoding import to_bytes
+
+
+def sign_sha1(msg, rsa_private_key):
+    key = load_pem_private_key(
+        to_bytes(rsa_private_key), password=None, backend=default_backend()
+    )
+    return key.sign(msg, padding.PKCS1v15(), hashes.SHA1())
+
+
+def verify_sha1(sig, msg, rsa_public_key):
+    key = load_pem_public_key(to_bytes(rsa_public_key), backend=default_backend())
+    try:
+        key.verify(sig, msg, padding.PKCS1v15(), hashes.SHA1())
+        return True
+    except InvalidSignature:
+        return False