diff --git a/app/controllers/sso_controller.rb b/app/controllers/sso_controller.rb
index 7a1433873..23da4678f 100644
--- a/app/controllers/sso_controller.rb
+++ b/app/controllers/sso_controller.rb
@@ -24,11 +24,16 @@ class SsoController < ApplicationController
   end
 
   private
+  def base64_safe(content)
+    content = content.gsub('-', '+')
+    content.gsub('_', '/')
+  end
+
   def parse(auth)
-    crypted_str = Base64.decode64(auth)
+    crypted_str = Base64.decode64(base64_safe(auth))
     pkey = OpenSSL::PKey::RSA.new(File.new(File.join(Rails.root,"config/private.key")))
-    # content = pkey.private_decrypt(pwd,OpenSSL::PKey::RSA::NO_PADDING)
-    content = pkey.private_decrypt(crypted_str)
+    content = pkey.private_decrypt(crypted_str,OpenSSL::PKey::RSA::PKCS1_PADDING)
+    # content = pkey.private_decrypt(crypted_str)
     JSON.parser(content)
   end