Use word64 for ChaChaTLS InitialBlock (GH #265)

1 files changed, 3 insertions, 3 deletions

diff --git a/chacha.cpp b/chacha.cpp
index 1b2e813e..9b8117af 100644
--- a/chacha.cpp
+++ b/chacha.cpp
@@ -380,7 +380,7 @@ void ChaChaTLS_Policy::CipherSetKey(const NameValuePairs &params, const byte *ke
     // RFC 7539 test vectors use an initial block counter. However, some of them

     // don't start at 0. If Resynchronize() is called we set to 0. Hence, stash

     // the initial block counter in m_state[16]. Then use it in Resynchronize().

-    int block;

+    word64 block;

     if (params.GetValue("InitialBlock", block))

         m_state[16] = static_cast<word32>(block);

     else

@@ -605,8 +605,8 @@ void ChaChaTLS_Policy::OperateKeystream(KeystreamOperation operation,
         {

             // m_state[13]++;

 

-            // RFC 7539 does not say what to do here. ChaCha-TLS uses state[13]

-            // for part of the nonce. We can't carry into it. Shit or go blind...

+            // RFC 7539 does not say what to do here. ChaCha-TLS uses state[13] for

+            // part of the nonce, and we can't carry into it. Shit or go blind...

             // https://mailarchive.ietf.org/arch/msg/saag/S0_YjVkzEx2s2bHd8KIzjK1CwZ4

             CRYPTOPP_ASSERT(0);

         }