Update comments

1 files changed, 5 insertions, 2 deletions

diff --git a/hc256.cpp b/hc256.cpp
index 1cdc0cb2..d7c47fd8 100644
--- a/hc256.cpp
+++ b/hc256.cpp
@@ -100,8 +100,11 @@ void HC256Policy::OperateKeystream(KeystreamOperation operation, byte *output, c
 		PutWord(false, LITTLE_ENDIAN_ORDER, out, Generate());

 

 	// If AdditiveCipherTemplate does not have an accumulated keystream

-	//  then it will ask OperateKeystream to XOR the plaintext with

-	//  the keystream and write it to the ciphertext buffer.

+	//  then it will ask OperateKeystream to generate one. Optionally it

+	//  will ask for an XOR of the input with the keystream while

+	//  writing the result to the output buffer. In all cases the

+	//  output buffer is written. The optional part is adding the

+	//  input buffer and keystream.

 	if ((operation & INPUT_NULL) != INPUT_NULL)

 		xorbuf(output, input, msglen);

 }