Upgraded Ruby to 2.4.2, fixed OpenSSL warnings, and 3 gems

app/models/work_info.rb

@@ -9,18 +9,18 @@ class WorkInfo < ApplicationRecord
   end
 
   def encrypt_ssn
-    aes = OpenSSL::Cipher::Cipher.new(cipher_type)
+    aes = OpenSSL::Cipher.new(cipher_type)
     aes.encrypt
-    aes.key = key
+    aes.key = key[0..31]
     aes.iv = iv if iv != nil
     self.encrypted_ssn = aes.update(self.SSN) + aes.final
     self.SSN = nil
   end
 
   def decrypt_ssn
-    aes = OpenSSL::Cipher::Cipher.new(cipher_type)
+    aes = OpenSSL::Cipher.new(cipher_type)
     aes.decrypt
-    aes.key = key
+    aes.key = key[0..31]
     aes.iv = iv if iv != nil
     aes.update(self.encrypted_ssn) + aes.final
   end