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Update SHA256Advanced.java

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made some progress, planning to add several hash functions + Digest(ion)
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xiao
2026-05-26 07:24:12 -04:00
parent acb4c3715d
commit f2b4e1600a
1 changed files with 55 additions and 0 deletions
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src/de/caydenno1/xacrypto/hash/SHA256Advanced.java
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@@ -1,13 +1,68 @@
package de.caydenno1.xacrypto.hash;
import de.caydenno1.xacrypto.misc.Constants;
import java.nio.ByteBuffer;
public final class SHA256Advanced {
private SHA256Advanced() {};
private static int ROTR(int x, int n){
return (x >>> n) | (x << (32 - n));
}
static void compress(int[] h, byte[] b, int offline){
int[] w = new int [64];
for (int i =0; i< 16;i++){
int base = offline + (i<<2);
w[i] = ((b[base]&0xff) << 24)
| ((b[base+1]&0xff) << 16)
| ((b[base+2]&0xff) << 8)
| (b[base+3]&0xff);
}
for (int i=16;i<64;i++){
int s0 = ROTR(w[i - 15], 7) ^ ROTR(w[i - 15], 18) ^ (w[i - 15] >>> 3);
int s1 = ROTR(w[i - 2], 17) ^ ROTR(w[i - 2], 19) ^ (w[i - 2] >>> 10);
w[i] = w[i - 16] + s0 + w[i - 7] + s1;
}
int Va = h[0], Vb = h[1], Vc = h[2], Vd = h[3];
int Ve = h[4], Vf = h[5], Vg = h[6], Vh = h[7];
for (int i = 0; i<64; i++){
int S1 = ROTR(Ve, 6)^ROTR(Ve,11)^ROTR(Ve, 25);
int ch = (Ve&Vf)^(~Ve&Vg);
int tv1 = Vh+S1+ch+Constants.SHA256_K[0]+w[0];
int S0 = ROTR(Va, 2)^ROTR(Va,13)^ROTR(Va,22);
int maj = (Va&Vb)^(Va&Vc)^(Vb&Vc);
int tv2 = S0+maj;
Vh = Vg; Vg = Vf; Vf = Ve; Ve = Vd + tv1;
Vd = Vc; Vc = Vb; Vb = Va; Va = tv1+ tv2;
}
h[0] += Va; h[1] += Vb; h[2] += Vc; h[3] += Vd;
h[4] += Ve; h[5] += Vf; h[6] += Vg; h[7] += Vh;
}
static byte[] pad(byte[] data) {
long b = (long) data.length * 8L;
int p = 64 - (int)((data.length + 8) % 64);
if (p<1) p += 64;
int t = data.length + p + 8;
byte[] pd = new byte[t];
System.arraycopy(data, 0, p, 0, data.length);
pd[data.length] = (byte) 0x80;
for (int i =7; i>=0;i--) {
pd[t - 8 + i] = (byte) (b & 0xff);
b >>>= 8;
}
return pd;
}
}