Switch to urlsafe base62 for aes tokens

.gitignore

@@ -20,3 +20,4 @@ client_secret.json
 yarn-error.log
 package-lock.json
 yarn.lock
+genzai-app-*.json

common/aes_cypher.py

@@ -1,4 +1,4 @@
-import base64
+import base62
 from Crypto.Cipher import AES
 from Crypto import Random
 
@@ -18,10 +18,10 @@ def encrypt(self, raw):
         raw = self.pad(raw)
         iv = Random.new().read(AES.block_size)
         cipher = AES.new(self.key, AES.MODE_CBC, iv)
-        return base64.b64encode(iv + cipher.encrypt(raw))
+        return base62.encodebytes(iv + cipher.encrypt(raw))
 
     def decrypt(self, enc):
-        enc = base64.b64decode(enc)
+        enc = base62.decodebytes(enc)
         iv = enc[:16]
         cipher = AES.new(self.key, AES.MODE_CBC, iv)
         return self.unpad(cipher.decrypt(enc[16:]))

requirements.txt

@@ -5,4 +5,5 @@ oauth2client==3.0.0
 # google-cloud-bigquery==0.21.0
 google_api_python_client==1.5.1
 GoogleAppEngineCloudStorageClient==1.9.22.1
-pyjwt==1.4.1
+pyjwt==1.4.1
+pybase62