diff options
Diffstat (limited to 'SHA3.java')
| -rw-r--r-- | SHA3.java | 38 |
1 files changed, 31 insertions, 7 deletions
@@ -440,13 +440,25 @@ public class SHA3 */ private static void update(byte[] msg) { + update(msg, msg.length); + } + + + /** + * Absorb the more of the message message to the Keccak sponge + * + * @param msg The partial message + * @param msglen The length of the partial message + */ + private static void update(byte[] msg, int msglen) + { int rr = SHA3.r >> 3; int ww = SHA3.w >> 3; - if (SHA3.mptr + msg.length > SHA3.M.length) + if (SHA3.mptr + msglen > SHA3.M.length) System.arraycopy(SHA3.M, 0, SHA3.M = new byte[SHA3.M.length << 1], 0, SHA3.mptr); - System.arraycopy(msg, 0, SHA3.M, SHA3.mptr, msg.length); - SHA3.mptr += msg.length; + System.arraycopy(msg, 0, SHA3.M, SHA3.mptr, msglen); + SHA3.mptr += msglen; int len = SHA3.mptr; len -= len % ((SHA3.r * SHA3.b) >> 3); byte[] message; @@ -510,15 +522,27 @@ public class SHA3 */ private static byte[] digest(byte[] msg) { + return digest(msg, msg.length); + } + + + /** + * Absorb the last part of the message and squeeze the Keccak sponge + * + * @param msg The rest of the message + * @param msglen The length of the partial message + */ + private static byte[] digest(byte[] msg, int msglen) + { byte[] message; - if ((msg == null) || (msg.length == 0)) + if ((msg == null) || (msglen == 0)) message = SHA3.pad10star1(SHA3.M, SHA3.mptr, SHA3.r); else { - if (SHA3.mptr + msg.length > SHA3.M.length) + if (SHA3.mptr + msglen > SHA3.M.length) System.arraycopy(SHA3.M, 0, SHA3.M = new byte[SHA3.M.length << 1], 0, SHA3.mptr); - System.arraycopy(msg, 0, SHA3.M, SHA3.mptr, msg.length); - message = SHA3.pad10star1(SHA3.M, SHA3.mptr + msg.length, SHA3.r); + System.arraycopy(msg, 0, SHA3.M, SHA3.mptr, msglen); + message = SHA3.pad10star1(SHA3.M, SHA3.mptr + msglen, SHA3.r); } SHA3.M = null; int len = message.length; |