Adding support for cfssl auth mode signing

lemur/plugins/lemur_cfssl/plugin.py

@@ -10,6 +10,9 @@
 
 import json
 import requests
+import base64
+import hmac
+import hashlib
 
 from flask import current_app
 
@@ -48,6 +51,21 @@ class CfsslIssuerPlugin(IssuerPlugin):
         data = {'certificate_request': csr}
         data = json.dumps(data)
 
+        try:
+            hex_key = current_app.config.get('CFSSL_KEY')
+            key=bytes.fromhex(hex_key)
+        except:
+            #unable to find CFSSL_KEY in config, continue using normal sign method
+            pass
+        else:
+            data=data.encode()
+
+            token = base64.b64encode(hmac.new(key,data,digestmod=hashlib.sha256).digest())
+            data = base64.b64encode(data)
+
+            data = json.dumps({'token': token.decode('utf-8'), 'request': data.decode('utf-8')})
+
+            url = "{0}{1}".format(current_app.config.get('CFSSL_URL'), '/api/v1/cfssl/authsign')
         response = self.session.post(url, data=data.encode(encoding='utf_8', errors='strict'))
         if response.status_code > 399:
             metrics.send('cfssl_create_certificate_failure', 'counter', 1)