Maven (#9)

2026-08-21 13:36:21 -04:00 · 2026-06-02 11:58:08 -04:00
parent 3051825098
commit e53c8d02af
16 changed files with 99 additions and 16 deletions
@@ -0,0 +1,82 @@
+package de.caydenno1.xacrypto.hash.sha;
+
+import de.caydenno1.xacrypto.misc.Constants;
+import de.caydenno1.xacrypto.hash.sha.Shared;
+import java.nio.charset.StandardCharsets;
+
+import static de.caydenno1.xacrypto.hash.sha.Shared.hex;
+
+public class SHA1 {
+
+    public static byte[] hash(byte[] data){
+        byte[] padded = Shared.pad(data);
+
+        int a0 = Constants.SHA_H[0], a1 = Constants.SHA_H[1], a2 = Constants.SHA_H[2], a3 = Constants.SHA_H[3], a4 = Constants.SHA_H[4];
+
+        int[] w = new int[80];
+
+        for (int i = 0 ; i < padded.length ; i += 64) {
+
+            for (int j = 0 ; j < 16 ; j++) {
+                int o = i + j * 4;
+                w[j] = ((padded[o] & 0xff) << 24)
+                        | ((padded[o + 1] & 0xff) << 16)
+                        | ((padded[o + 2] & 0xff) << 8)
+                        | (padded[o + 3] & 0xff);
+            }
+
+            for (int t = 16; t < 80; t++) {
+                w[t] = de.caydenno1.xacrypto.hash.ROT.ROTL(
+                        w[t-3] ^ w[t-8] ^ w[t-14] ^ w[t-16], 1
+                );
+            }
+
+            int a = a0, b = a1, c = a2, d = a3, e = a4;
+
+            for (int t = 0 ; t < 80 ; t++) {
+                int f, k;
+
+                if (t < 20) {
+                    f = (b & c) | ((~b) & d);
+                    k = Constants.SHA1_K[0];
+                } else if (t < 40) {
+                    f = b ^ c ^ d;
+                    k = Constants.SHA1_K[1];
+                } else if (t < 60) {
+                    f = (b & c) | (b & d) | (c & d);
+                    k = Constants.SHA1_K[2];
+                } else {
+                    f = b ^ c ^ d;
+                    k = Constants.SHA1_K[3];
+                }
+
+                int temp = de.caydenno1.xacrypto.hash.ROT.ROTL(a, 5);
+                temp += f;
+                temp += e;
+                temp += k;
+                temp += w[t];
+
+                e = d;
+                d = c;
+                c = de.caydenno1.xacrypto.hash.ROT.ROTL(b, 30);
+                b = a;
+                a = temp;
+            }
+
+            a0 += a;
+            a1 += b;
+            a2 += c;
+            a3 += d;
+            a4 += e;
+        }
+
+        return Shared.INT2BYTE(a0, a1, a2, a3, a4);
+    }
+
+    public static String hash(String data) {
+        byte[] result = hash(data.getBytes(StandardCharsets.UTF_8));
+        return hex(result);
+    }
+
+
+}