112 lines
4.5 KiB
Java
112 lines
4.5 KiB
Java
import java.nio.charset.StandardCharsets;
|
|
import java.util.Arrays;
|
|
|
|
public final class RIPEMD160Task {
|
|
|
|
public static void main(String[] aArgs) {
|
|
System.out.println(RIPEMD160.messageDigest("Rosetta Code"));
|
|
}
|
|
|
|
}
|
|
|
|
final class RIPEMD160 {
|
|
|
|
public static String messageDigest(String aMessage) {
|
|
int[] state = { 0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0 };
|
|
|
|
byte[] bytes = addPadding(aMessage);
|
|
for ( int i = 0; i < bytes.length / BLOCK_LENGTH; i++ ) {
|
|
int[] schedule = new int[16];
|
|
for ( int j = 0; j < BLOCK_LENGTH; j++ ) {
|
|
schedule[j / 4] |= ( bytes[i + j] & 0xff ) << ( j % 4 * 8 );
|
|
}
|
|
|
|
int a = state[0], b = state[1], c = state[2], d = state[3], e = state[4];
|
|
int aa = state[0], bb = state[1], cc = state[2], dd = state[3], ee = state[4];
|
|
int t = 0, tt = 0;
|
|
|
|
for ( int j = 0; j < 80; j++ ) {
|
|
int jj = j / 16;
|
|
t = Integer.rotateLeft(a + ff(jj + 1, b, c, d) + schedule[RL[j]] + KL[jj], SL[j]) + e;
|
|
tt = Integer.rotateLeft(aa + ff(5 - jj, bb, cc, dd) + schedule[RR[j]] + KR[jj], SR[j]) + ee;
|
|
|
|
a = e; e = d; d = Integer.rotateLeft(c, 10); c = b; b = t;
|
|
aa = ee; ee = dd; dd = Integer.rotateLeft(cc, 10); cc = bb; bb = tt;
|
|
}
|
|
|
|
t = state[1] + c + dd;
|
|
state[1] = state[2] + d + ee;
|
|
state[2] = state[3] + e + aa;
|
|
state[3] = state[4] + a + bb;
|
|
state[4] = state[0] + b + cc;
|
|
state[0] = t;
|
|
}
|
|
|
|
String result = "";
|
|
for ( int i = 0; i < state.length * 4; i++ ) {
|
|
result += String.format("%02x", (byte) ( state[i / 4] >>> ( i % 4 * 8 ) ));
|
|
}
|
|
return result;
|
|
}
|
|
|
|
private static byte[] addPadding(String aMessage) {
|
|
byte[] bytes = aMessage.getBytes(StandardCharsets.UTF_8);
|
|
bytes = Arrays.copyOf(bytes, bytes.length + 1);
|
|
bytes[bytes.length - 1] = (byte) 0x80;
|
|
|
|
final int length = aMessage.length();
|
|
int padding = BLOCK_LENGTH - ( (length + 1 ) % BLOCK_LENGTH );
|
|
if ( padding < 8 ) {
|
|
padding += BLOCK_LENGTH;
|
|
}
|
|
bytes = Arrays.copyOf(bytes, bytes.length + padding);
|
|
|
|
final long bitLength = 8 * length;
|
|
for ( int i = 0; i < 8; i++ ) {
|
|
bytes[bytes.length - 8 + i] = (byte) ( bitLength >>> ( 8 * i ) );
|
|
}
|
|
return bytes;
|
|
}
|
|
|
|
private static int ff(int aGroup, int aX, int aY, int aZ) {
|
|
return switch ( aGroup ) {
|
|
case 1 -> aX ^ aY ^ aZ;
|
|
case 2 -> ( aX & aY ) | ( ~aX & aZ );
|
|
case 3 -> ( aX | ~aY ) ^ aZ;
|
|
case 4 -> ( aX & aZ ) | ( aY & ~aZ );
|
|
case 5 -> aX ^ ( aY | ~aZ );
|
|
default -> throw new IllegalArgumentException("Unexpected argument: " + aGroup);
|
|
};
|
|
}
|
|
|
|
private static final int[] KL = new int[] { 0x00000000, 0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xa953fd4e };
|
|
private static final int[] KR = new int [] { 0x50a28be6, 0x5c4dd124, 0x6d703ef3, 0x7a6d76e9, 0x00000000 };
|
|
|
|
private static final int[] RL = new int[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
|
|
7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8,
|
|
3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12,
|
|
1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2,
|
|
4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13 };
|
|
|
|
private static final int[] RR = new int[] { 5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12,
|
|
6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2,
|
|
15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13,
|
|
8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14,
|
|
12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11 };
|
|
|
|
private static final int[] SL = new int[] { 11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8,
|
|
7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12,
|
|
11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5,
|
|
11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12,
|
|
9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6 };
|
|
|
|
private static final int[] SR = new int[] { 8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6,
|
|
9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11,
|
|
9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5,
|
|
15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8,
|
|
8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11 };
|
|
|
|
private static final int BLOCK_LENGTH = 64;
|
|
|
|
}
|