1 files changed, 16 insertions, 3 deletions
diff --git a/src/block/lion/lion.h b/src/block/lion/lion.h
index f24acdb72..bba4e6f30 100644
--- a/src/block/lion/lion.h
+++ b/src/block/lion/lion.h
@@ -14,8 +14,13 @@
 
 namespace Botan {
 
-/*
-* Lion
+/**
+* Lion is a block cipher construction designed by Ross Anderson and
+* Eli Biham, described in "Two Practical and Provably Secure Block
+* Ciphers: BEAR and LION". It has a variable block size and is
+* designed to encrypt very large blocks (up to a megabyte)
+
+* http://www.cl.cam.ac.uk/~rja14/Papers/bear-lion.pdf
 */
 class BOTAN_DLL Lion : public BlockCipher
    {
@@ -27,7 +32,15 @@ class BOTAN_DLL Lion : public BlockCipher
       std::string name() const;
       BlockCipher* clone() const;
 
-      Lion(HashFunction*, StreamCipher*, u32bit);
+      /**
+      * @param hash the hash to use internally
+      * @param cipher the stream cipher to use internally
+      * @param block_size the size of the block to use
+      */
+      Lion(HashFunction* hash,
+           StreamCipher* cipher,
+           u32bit block_size);
+
       ~Lion() { delete hash; delete cipher; }
    private:
       void key_schedule(const byte[], u32bit);