Split code into modules and add gulpfile

src/samsung.ts

@@ -0,0 +1,78 @@
+/* tslint:disable:no-bitwise */
+/* Return password for samsung laptops
+ * 12 or 18 hexhecimal digits like 07088120410C0000
+ */
+
+import { makeSolver } from "./utils";
+import { keyboardEncToAscii } from "./utils";
+
+const rotationMatrix1 = [
+    7, 1, 5, 3, 0, 6, 2, 5, 2, 3, 0, 6, 1, 7, 6, 1, 5, 2, 7, 1, 0, 3, 7,
+    6, 1, 0, 5, 2, 1, 5, 7, 3, 2, 0, 6
+];
+const rotationMatrix2 = [
+    1, 6, 2, 5, 7, 3, 0, 7, 1, 6, 2, 5, 0, 3, 0, 6, 5, 1, 1, 7, 2, 5, 2,
+    3, 7, 6, 2, 1, 3, 7, 6, 5, 0, 1, 7
+];
+
+function keyToAscii(intKeys: number[]): string | undefined {
+    let out = "";
+
+    for (let intKey of intKeys) {
+        if (intKey === 0) {
+            return out;
+        }
+        if (intKey < 32 || intKey > 127) {
+            return undefined;
+        }
+        out += String.fromCharCode(intKey);
+    }
+
+    return out;
+}
+
+function decryptHash(hash: number[], key: number, rotationMatrix: number[]): number[] {
+    let outhash: number[] = [];
+
+    for (let i = 0; i < hash.length; i++) {
+        const val = ((hash[i] << (rotationMatrix[7 * key + i])) & 0xFF) |
+                    (hash[i] >> (8 - rotationMatrix[7 * key + i]));
+        outhash.push(val);
+    }
+
+    return outhash;
+}
+
+function samsungKeygen(serial: string): string[] {
+    let hash: number[] = [];
+
+    for (let i = 1; i < Math.floor(serial.length / 2); i++) {
+        let val = parseInt(serial.charAt(2 * i) + serial.charAt(2 * i + 1), 16);
+        hash.push(val);
+    }
+    let key = parseInt(serial.substring(0, 2), 16) % 5;
+
+    let calcScanCodePwd = (matrix: number[]) =>
+        keyboardEncToAscii(decryptHash(hash, key, matrix));
+
+    let scanCodePassword = calcScanCodePwd(rotationMatrix1);
+    if (scanCodePassword === "") {
+        scanCodePassword = calcScanCodePwd(rotationMatrix2);
+    }
+
+    const asciiPassword1 = keyToAscii(decryptHash(hash, key, rotationMatrix1));
+    const asciiPassword2 = keyToAscii(decryptHash(hash, key, rotationMatrix2));
+
+    // TODO: This might require polyfil
+    return [scanCodePassword, asciiPassword1, asciiPassword2].
+        filter((code) => code ? true : false) as string[];
+}
+
+export let samsungSolver = makeSolver({
+    name: "Samsung",
+    examples: ["07088120410C0000"],
+    inputValidator: (s) => /^[0-9ABCDEF]+$/i.test(s) && (
+        s.length === 12 || s.length === 14 || s.length === 16 || s.length === 18
+    ),
+    fun: samsungKeygen
+});