1 files changed, 12 insertions, 12 deletions
diff --git a/src/engine/engine.cpp b/src/engine/engine.cpp
index 80712a2f8..d4f6885bc 100644
--- a/src/engine/engine.cpp
+++ b/src/engine/engine.cpp
@@ -13,79 +13,79 @@ BlockCipher*
 Engine::find_block_cipher(const SCAN_Name&,
                           Algorithm_Factory&) const
    {
-   return 0;
+   return nullptr;
    }
 
 StreamCipher*
 Engine::find_stream_cipher(const SCAN_Name&,
                            Algorithm_Factory&) const
    {
-   return 0;
+   return nullptr;
    }
 
 HashFunction*
 Engine::find_hash(const SCAN_Name&,
                   Algorithm_Factory&) const
    {
-   return 0;
+   return nullptr;
    }
 
 MessageAuthenticationCode*
 Engine::find_mac(const SCAN_Name&,
                  Algorithm_Factory&) const
    {
-   return 0;
+   return nullptr;
    }
 
 PBKDF*
 Engine::find_pbkdf(const SCAN_Name&,
                    Algorithm_Factory&) const
    {
-   return 0;
+   return nullptr;
    }
 
 Modular_Exponentiator*
 Engine::mod_exp(const BigInt&,
                 Power_Mod::Usage_Hints) const
    {
-   return 0;
+   return nullptr;
    }
 
 Keyed_Filter* Engine::get_cipher(const std::string&,
                                  Cipher_Dir,
                                  Algorithm_Factory&)
    {
-   return 0;
+   return nullptr;
    }
 
 PK_Ops::Key_Agreement*
 Engine::get_key_agreement_op(const Private_Key&) const
    {
-   return 0;
+   return nullptr;
    }
 
 PK_Ops::Signature*
 Engine::get_signature_op(const Private_Key&) const
    {
-   return 0;
+   return nullptr;
    }
 
 PK_Ops::Verification*
 Engine::get_verify_op(const Public_Key&) const
    {
-   return 0;
+   return nullptr;
    }
 
 PK_Ops::Encryption*
 Engine::get_encryption_op(const Public_Key&) const
    {
-   return 0;
+   return nullptr;
    }
 
 PK_Ops::Decryption*
 Engine::get_decryption_op(const Private_Key&) const
    {
-   return 0;
+   return nullptr;
    }
 
 }