add signature verification module

- (the (test) signature allegedly has the wrong length?)
- add login route for main.py

web/backend/kioubit_verify.py

@@ -0,0 +1,49 @@
+#! /usr/bin/env python3
+
+#import OpenSSL
+#from OpenSSL.crypto import load_publickey, FILETYPE_PEM, X509
+#from OpenSSL.crypto import verify as OpenSSL_verify
+import base64, os
+#from hashlib import sha512
+from Crypto.PublicKey import ECC
+from Crypto.Signature import DSS 
+import Crypto.Hash.SHA512 as SHA512
+#from hashlib import sha512 as SHA512
+
+PUBKEY_FILE = os.path.dirname(__file__)+"/kioubit-auth-pubkey.pem"
+
+class AuthVerifyer ():
+
+    def __init__(self,domain, pubkey=PUBKEY_FILE):
+        self.domain = domain
+        with open(pubkey) as pk:
+            pk_content = ""
+            for line in pk.readlines():
+                pk_content += line
+            print(pk_content)
+            self.pubkey = ECC.import_key(pk_content)
+            #self.pubkey.set_pubkey(
+            #    load_publickey(OpenSSL.crypto.FILETYPE_PEM, pk_content)
+            #)
+        
+        print(self.pubkey)
+        
+    def verify(self, params, signature):
+        # sig = base64.b64decode(signature)
+        # print(type(sig))
+        #OpenSSL_verify(self.pubkey, sig
+        #, base64.b64decode(params), "sha512")
+        h = SHA512.new()
+        h.update(base64.b64decode(params))
+        print(h.hexdigest())
+        verifier = DSS.new(self.pubkey, 'fips-186-3')
+        print(verifier.verify(h, signature))
+
+if __name__ == "__main__":
+    example_com_verifier = AuthVerifyer("example.com")
+    example_com_verifier.verify(
+        params="eyJhc24iOiI0MjQyNDIzMDM1IiwidGltZSI6MTY2ODI2NjkyNiwiYWxsb3dlZDQiOiIxNzIuMjIuMTI1LjEyOFwvMjYsMTcyLjIwLjAuODFcLzMyIiwiYWxsb3dlZDYiOiJmZDYzOjVkNDA6NDdlNTo6XC80OCxmZDQyOmQ0MjpkNDI6ODE6OlwvNjQiLCJtbnQiOiJMQVJFLU1OVCIsImF1dGh0eXBlIjoibG9naW5jb2RlIiwiZG9tYWluIjoic3ZjLmJ1cmJsZS5kbjQyIn0=",
+        signature="MIGIAkIBAmwz3sQ1vOkH8+8e0NJ8GsUqKSaazIWmYDp60sshlTo7gCAopZOZ6/+tD6s+oEGM1i5mKGbHgK9ROATQLHxUZecCQgCa2N828uNn76z1Yg63/c7veMVIiK4l1X9TCUepJnJ3mCto+7ogCP+2vQm6GHipSNRF4wnt6tZbir0HZvrqEnRAmA=="
+        )
+#params = "eyJhc24iOiI0MjQyNDIzMDM1IiwidGltZSI6MTY2ODI1NjI5NSwiYWxsb3dlZDQiOiIxNzIuMjIuMTI1LjEyOFwvMjYsMTcyLjIwLjAuODFcLzMyIiwiYWxsb3dlZDYiOiJmZDYzOjVkNDA6NDdlNTo6XC80OCxmZDQyOmQ0MjpkNDI6ODE6OlwvNjQiLCJtbnQiOiJMQVJFLU1OVCIsImF1dGh0eXBlIjoibG9naW5jb2RlIiwiZG9tYWluIjoic3ZjLmJ1cmJsZS5kbjQyIn0=", 
+#signature = 'MIGHAkFy1m+9ahjIc5cJk/p+RiXJbhbWT5rPSJNg9Q3c8UTAM4F7lz2OqdWHw6GZN5NQgvqm6OB3Y751djYwCd54y2Kn4wJCAcBaOrtSclxkGIleVx183PhTnSr97r2F089PsDzNXIBvH5pYUwvJX7hG0op0f5tPm7fl12HOOrr8Q6kWW+XTrgGX'