-//Expand a user-supplied key material into a session key.
-// key - The 128/192/256-bit user-key to use.
-// chain - initial chain block for CBC and CFB modes.
-// keylength - 16, 24 or 32 bytes
-// blockSize - The block size in bytes of this Rijndael (16, 24 or 32 bytes).
+/** Expand a user-supplied key material into a session key.
+ * @param key The 128/192/256-bit user-key to use.
+ * @param chain initial chain block for CBC and CFB modes.
+ * @param keylength 16, 24 or 32 bytes
+ * @param blockSize The block size in bytes of this Rijndael (16, 24 or 32 bytes).
+ */