chucheng92/keccak

:lemon:SHA-3 algorithm Keccak Implementation

What

SHA-3 algorithm

Usage

• Digests.Keccak(224)

• Digests.Keccak(256)

• Digests.Keccak(384)

• Digests.Keccak(512)

ps:if you want to get Hex String output, you need to translate byte[] to Hex String.

License

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose.

See the GNU Lesser General Public License for more details.

keccak's Issues

Keccak256 hash gives incorrect hash result

This is my code while using the Keccak library

public class Main {
    public static void main(String[] args) {
        byte[] input = "helloworld".getBytes();
        byte[] hash = Digests.keccak256().digest(input, 0, input.length);
        System.out.println(toHexString(hash));
    }
    
    public static String toHexString(byte[] bytes) {
        char[] hexArray = "0123456789ABCDEF".toCharArray();
        char[] hexChars = new char[bytes.length * 2];
        for (int j = 0; j < bytes.length; j++) {
            int v = bytes[j] & 0xFF;
            hexChars[j * 2] = hexArray[v >>> 4];
            hexChars[j * 2 + 1] = hexArray[v & 0x0F];
        }
        return new String(hexChars);
    }
}

Output shows the hash: 92DAD9443E4DD6D70A7F11872101EBFF87E21798E4FBB26FA4BF590EB440E71B for the string helloworld.

Test on https://emn178.github.io/online-tools/keccak_256.html shows fa26db7ca85ead399216e7c6316bc50ed24393c3122b582735e7f3b0f91b93f0.