From 6208f1f502b5c4a3e2f5b6e1771b5f7ce5dd9fbe Mon Sep 17 00:00:00 2001
From: Stephan Richter <github@keawe.de>
Date: Mon, 11 Sep 2017 09:46:26 +0200
Subject: [PATCH] Projekt neu eingecheckt
---
src/ScharedSecret.java | 135 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 135 insertions(+)
create mode 100644 src/ScharedSecret.java
diff --git a/src/ScharedSecret.java b/src/ScharedSecret.java
new file mode 100644
index 0000000..f38cbe3
--- /dev/null
+++ b/src/ScharedSecret.java
@@ -0,0 +1,135 @@
+import java.sql.Time;
+import java.util.Random;
+
+public class ScharedSecret {
+ static Random rand=new Random();
+
+ public static int r10(){
+ return rand.nextInt(10);
+ }
+
+ public static int[] encodeBit(boolean bit){
+ int threshold=22;
+ int dist=3;
+
+ int low = threshold-dist;
+ int high = threshold+dist;
+
+ int d1,d2,d3,d4,d5;
+ //System.out.println("\nbit: "+(bit?1:0));
+ if (bit){
+ //System.out.println("bounds: ["+threshold+"..."+high+"]");
+ d1=r10();
+ while(d1+18<threshold) d1=r10();
+ //System.out.println("d1 = "+d1);
+
+ d2=r10();
+ while (d1+d2+9<threshold||d1+d2>high) d2=r10();
+ //System.out.println("d2 = "+d2);
+
+ d3=r10();
+ while (d1+d2+d3<threshold||d1+d2+d3>high)d3=r10();
+ //System.out.println("d3 = "+d3);
+
+ d4=r10();
+ while (d1+d2+d3+d4 > high) d4=r10();
+ //System.out.println("d4 = "+d4);
+
+ d5=r10();
+ while (d1+d2+d3+d4+d5 > high) d5=r10();
+ //System.out.println("d5 = "+d5);
+
+
+ } else {
+ //System.out.println("bounds: ["+low+"..."+threshold+"]");
+ d1=r10();
+ while(d1+18<low) d1=r10();
+ //System.out.println("d1 = "+d1);
+
+ d2=r10();
+ while (d1+d2+9<low) d2=r10();
+ //System.out.println("d2 = "+d2);
+
+ d3=r10();
+ while (d1+d2+d3>threshold||d1+d2+d3<low)d3=r10();
+ //System.out.println("d3 = "+d3);
+
+ d4=r10();
+ while (d1+d2+d3+d4>threshold||d1+d2+d3+d4<low) d4=r10();
+ //System.out.println("d4 = "+d4);
+
+ d5=r10();
+ while (d1+d2+d3+d4+d5 > threshold||d1+d2+d3+d4+d5<low) d5=r10();
+ //System.out.println("d5 = "+d5);
+ }
+
+ //System.out.println(""+d1+d2+d3+d4+d5+" ("+(d1+d2+d3+d4+d5)+")");
+ int[] result = {d1,d2,d3,d4,d5};
+ return result;
+ }
+
+ public static String[] encodeChar(char c){
+ String binary = Integer.toBinaryString(c & 0xFF);
+
+ while (binary.length()<8) binary='0'+binary;
+ System.out.print(binary+" ");
+ String code1="";
+ String code2="";
+ String code3="";
+ String code4="";
+ String code5="";
+ for (int i=0; i<8;i++){
+ int[] digits = encodeBit(binary.charAt(i)=='1');
+ int index = rand.nextInt(4);
+ code1+=digits[index];
+ if (index!=4)digits[index]=digits[4]; // move last digit to position of used digit
+
+ index = rand.nextInt(3);
+ code2+=digits[index];
+ if (index!=3)digits[index]=digits[3]; // move last digit to position of used digit
+
+ index = rand.nextInt(2);
+ code3+=digits[index];
+ if (index!=2)digits[index]=digits[2]; // move last digit to position of used digit
+
+ index = rand.nextInt(1);
+ code4+=digits[index];
+ code5+=digits[1-index];
+ }
+ String[] result = {code1,code2,code3,code4,code5};
+ return result;
+ }
+
+ public static void main(String[] args) {
+ String secret="gnome-keyring";
+ String code1="";
+ String code2="";
+ String code3="";
+ String code4="";
+ String code5="";
+ System.out.print(" Binary: ");
+ for (int i=0; i<secret.length();i++){
+ String[] codes = encodeChar(secret.charAt(i));
+ code1+=codes[0]+" ";
+ code2+=codes[1]+" ";
+ code3+=codes[2]+" ";
+ code4+=codes[3]+" ";
+ code5+=codes[4]+" ";
+ }
+ System.out.println();
+ System.out.println("\nSecret 1: "+code1);
+ System.out.println("\nSecret 2: "+code2);
+ System.out.println("\nSecret 3: "+code3);
+ System.out.println("\nSecret 4: "+code4);
+ System.out.println("\nSecret 5: "+code5);
+ System.out.print("\nChecksum: ");
+ for (int i=0; i<code1.length(); i++){
+
+ if (i%9==8) {
+ System.out.print(" ");
+ } else {
+ System.out.print((code1.charAt(i)+code2.charAt(i)+code3.charAt(i)+code4.charAt(i)+code5.charAt(i))>(240+22)?1:0);
+ }
+ }
+ }
+}
--
2.30.2