desアルゴリズムjavaシミュレーション実装
大学2年生の来学期は暗号学の課程の設計を応用します
githubプロジェクトを同期しました:
url:https://github.com/leiflee/desdemo
git:https://github.com/leiflee/desdemo.git
desアルゴリズムを実現し、具体的な各ステップの出力に記録があり、ワークモードに参加せず、暗号化された入力が英語とデジタルの混合文字列であることをサポートし、充填方式が採用した無限充填0のやり方をサポートした.次はソースコードです.
githubプロジェクトを同期しました:
url:https://github.com/leiflee/desdemo
git:https://github.com/leiflee/desdemo.git
desアルゴリズムを実現し、具体的な各ステップの出力に記録があり、ワークモードに参加せず、暗号化された入力が英語とデジタルの混合文字列であることをサポートし、充填方式が採用した無限充填0のやり方をサポートした.次はソースコードです.
// ， ，
package cryptology;
import java.util.Scanner;
/** * Created by leif on 2016/3/26 0026. */
public class des {
public static void main(String[] args) {
System.out.println("**********************************************************");
System.out.println(" DES ");
System.out.println("**********************************************************");
System.out.println();
@SuppressWarnings("resource")
Scanner in = new Scanner(System.in);
System.out.print(" ( )：");
String mmmmmm = in.nextLine();
System.out.print(" ( )：");
String kkkkkk = in.nextLine();
String[] M = util.all2string(mmmmmm);
char[] K = util.keypre(kkkkkk);
descore descore = new descore();
String mimi = descore.en(M, K);
String demimi = descore.de(util.all222string(mimi), K);
String demimistring = util.byte2string(demimi);
System.out.println("*************************************************");
System.out.println("********************** ***********************");
System.out.println(" ："+mmmmmm);
System.out.println("------------------------------------------------------------");
System.out.println(" ：");
System.out.println(" ："+ mimi);
System.out.println(" ："+util.two2hex(mimi));
System.out.println("------------------------------------------------------------");
System.out.println(" ：");
System.out.println(" ："+demimi);
System.out.println(" ："+util.two2hex(demimi));
System.out.println(" ："+demimistring);
}
}//
package cryptology;
/** * Created by leif on 2016/3/26 0026. */
public class descore {
/** * * @param M char[64] * @return char[56] */
private char[] initReplace(char[] M){
char[] tM = new char[64];
for (int i = 0; i < 64; i++){
tM[i] = M[data.IP[i]-1];
}
return tM;
}
/** * 1 * @param K char[64] * @return char[56] */
private char[] keyReplace1(char[] K){
char[] tK = new char[64];
for (int i = 0; i < 56; i++){
tK[i] = K[data.PC_1[i]-1];
}
return tK;
}
/** * * @param K char[56] * @param offset int * @return char[56] */
private char[] loopKey(char[] K, int offset){
String k1 = new String();
String k2 = new String();
String k = new String(K);
k1 = (k.substring(0,28)+k.substring(0,2)).substring(offset,offset+28);
k2 = (k.substring(28,56)+k.substring(28,30)).substring(offset,offset+28);
return (k1+k2).toCharArray();
}
/** * 2 * @param K char[56] * @return char[48] */
private char[] keyReplace2(char[] K){
char[] tK = new char[48];
for (int i = 0; i < 48; i++){
tK[i] = K[data.PC_2[i]-1];
}
return tK;
}
/** * 16 * @param K char[64] * @return */
private char[][] getKey(char[] K){
char[][] tK = new char[16][48];
char[][] ttK = new char[16][48];
char[] k1 = new char[56];
k1 = keyReplace1(K);
tK[0] = loopKey(k1,data.LeftMove[0]);
for (int i = 1; i < 16; i++){
tK[i] = loopKey(tK[i-1],data.LeftMove[i]);
}
for(int i = 0; i < 16; i++){
ttK[i] = keyReplace2(tK[i]);
}
return ttK;
}
/** * E （ ） * @param R char[32] * @return char[48] */
private char[] eReplace(char[] R){
char[] tR = new char[48];
for (int i = 0;i < 48; i++){
tR[i] = R[data.E[i]-1];
}
return tR;
}
/** * xor * @param tR char[48] * @param K char[48] * @return */
private char[] xor(char[] tR, char[] K){
String x = new String();
for (int i = 0; i < tR.length; i++){
x += tR[i] ^ K[i];
}
return x.toCharArray();
}
/** * s * @param xorR char[48] * @return char[32] */
private char[] sReplace(char[] xorR){
char[][] tR = new char[8][6];
/* String nn = new String(R); System.out.println(nn+nn.length());*/
String sr = new String();
for (int i = 0; i < 8; i++){
for (int j = 0; j < 6; j++){
tR[i][j] = xorR[i*6+j];
}
int p = util.two2ten(String.valueOf(tR[i][0])+String.valueOf(tR[i][5]));
int q = util.two2ten(String.valueOf(tR[i][1])+String.valueOf(tR[i][2])+String.valueOf(tR[i][3])+String.valueOf(tR[i][4]));
sr += String.format("%04d",Integer.parseInt(Integer.toBinaryString(data.S_Box[i][p][q])));
// sr += String.format("%04d",Integer.parseInt(Integer.toBinaryString(data.S_Box[i][(tR[i][0] << 1) + tR[i][5]][(tR[i][1] << 3) + (tR[i][2] << 2) + (tR[i][3] << 1) + tR[i][4]])));
}
return sr.toCharArray();
}
/** * p * @param sR char[32] * @return char[32] */
private char[] pReplace(char[] sR){
char[] pR = new char[32];
for (int i = 0; i < 32; i++){
pR[i] = sR[data.P[i]-1];
}
return pR;
}
/** * * @param R char[64] * @return char[64] */
private char[] init_1Replace(char[] R){
char[] tR = new char[64];
for (int i = 0; i < 64; i++){
tR[i] = R[data.IP_1[i]-1];
}
return tR;
}
/** * * @param R char[32] * @param K char[32] * @return char[32] */
public char[] core(char[] R, char[] K){
char[] eR = eReplace(R);
System.out.println("Etable ---"+new String(eR)+"-----"+util.two2hex(new String(eR)));
System.out.println(" ---"+new String(K)+"-----"+util.two2hex(new String(K)));
char[] xorR = xor(eR,K);
System.out.println("xor-1 ---"+new String(xorR)+"-----"+util.two2hex(new String(xorR)));
char[] sR = sReplace(xorR);
System.out.println("Sbox ---"+new String(sR)+"-----"+util.two2hex(new String(sR)));
char[] pR = pReplace(sR);
System.out.println("Ptable ---"+new String(pR)+"-----"+util.two2hex(new String(pR)));
@SuppressWarnings("unused")
String pp = new String(pR);
return pR;
}
public String enCode(char[] M, char[] K){
System.out.println("#########################");
System.out.println(" ===== === == == = = ");
System.out.println(" ---"+new String(M)+"-----"+util.two2hex(new String(M)));
System.out.println(" ---"+new String(K)+"-----"+util.two2hex(new String(K)));
char[][] L = new char[17][32];
char[][] R = new char[17][32];
char[][] key = new char[16][48];
char[] res = new char[64];
char[] r = new char[64];
M = initReplace(M);
System.out.println("IP ---"+new String(M)+"-----"+util.two2hex(new String(M)));
key = getKey(K);
for (int i = 0; i < 32; i++){
L[0][i] = M[i];
R[0][i] = M[i+32];
}
for (int i = 1; i < 17; i++){
System.out.println("=================== "+i+" ==================");
char[] xorR = xor(L[i-1],core(R[i-1],key[i-1]));
System.out.println("xor-2 "+new String(xorR)+"-----"+util.two2hex(new String(xorR)));
for (int j = 0; j < 32; j++){
L[i][j] = R[i-1][j];
R[i][j] = xorR[j];
}
}
for (int i = 0; i < 32; i++){
res[i] = R[16][i];
res[i+32] = L[16][i];
}
r = init_1Replace(res);
String rr = new String(r);
System.out.println(" ---"+new String(rr)+"-----"+util.two2hex(new String(rr)));
return rr;
}
public String deCode(char[] M, char[] K){
System.out.println("#########################");
System.out.println(" ===== === == == = = ");
System.out.println(" ---"+new String(M)+"-----"+util.two2hex(new String(M)));
System.out.println(" ---"+new String(K)+"-----"+util.two2hex(new String(K)));
char[][] L = new char[17][32];
char[][] R = new char[17][32];
char[][] key = new char[16][48];
char[] res = new char[64];
char[] r = new char[64];
M = initReplace(M);
System.out.println("IP ---"+new String(M)+"-----"+util.two2hex(new String(M)));
key = getKey(K);
for (int i = 0; i < 32; i++){
L[0][i] = M[i];
R[0][i] = M[i+32];
}
for (int i = 1; i < 17; i++){
System.out.println("=================== "+i+" ==================");
char[] xorR = xor(L[i-1],core(R[i-1],key[16-i]));
System.out.println("xor-2 "+new String(xorR)+"-----"+util.two2hex(new String(xorR)));
for (int j = 0; j < 32; j++){
L[i][j] = R[i-1][j];
R[i][j] = xorR[j];
}
}
for (int i = 0; i < 32; i++){
res[i] = R[16][i];
res[i+32] = L[16][i];
}
r = init_1Replace(res);
String rr = new String(r);
return rr;
}
public String en(String[] mm, char[] kk) {
String mi = "";
for(int i = 0; i < mm.length; i++){
char[] charrr = mm[i].toCharArray();
mi += enCode(charrr, kk);
}
return mi;
}
public String de(String[] mm, char[] kk) {
String mi = "";
for(int i = 0; i < mm.length; i++){
char[] charrr = mm[i].toCharArray();
mi += deCode(charrr, kk);
}
return mi;
}
}// des
package cryptology;
/** * Created by leif on 2016/3/26 0026. */
public class data {
//
static int length = 0;
public static int getLength() {
return length;
}
public static void setLength(int length) {
data.length = length;
}
/** * */
static final int[] IP = {
58, 50, 42, 34, 26, 18, 10, 2, 60, 52, 44, 36, 28, 20, 12, 4, 62, 54,
46, 38, 30, 22, 14, 6, 64, 56, 48, 40, 32, 24, 16, 8, 57, 49, 41, 33,
25, 17, 9, 1, 59, 51, 43, 35, 27, 19, 11, 3, 61, 53, 45, 37, 29, 21,
13, 5, 63, 55, 47, 39, 31, 23, 15, 7
}; // 64
/** * */
static final int[] IP_1 = {
40, 8, 48, 16, 56, 24, 64, 32, 39, 7, 47, 15, 55, 23, 63, 31, 38, 6,
46, 14, 54, 22, 62, 30, 37, 5, 45, 13, 53, 21, 61, 29, 36, 4, 44, 12,
52, 20, 60, 28, 35, 3, 43, 11, 51, 19, 59, 27, 34, 2, 42, 10, 50, 18,
58, 26, 33, 1, 41, 9, 49, 17, 57, 25
}; // 64
/** * 1 */
static final int[] PC_1 = {
57, 49, 41, 33, 25, 17, 9, 1, 58, 50, 42, 34, 26, 18, 10, 2, 59, 51,
43, 35, 27, 19, 11, 3, 60, 52, 44, 36, 63, 55, 47, 39, 31, 23, 15, 7,
62, 54, 46, 38, 30, 22, 14, 6, 61, 53, 45, 37, 29, 21, 13, 5, 28, 20,
12, 4
}; // 56
/** * 2 */
static final int[] PC_2 = {
14, 17, 11, 24, 1, 5, 3, 28, 15, 6, 21, 10, 23, 19, 12, 4, 26, 8, 16,
7, 27, 20, 13, 2, 41, 52, 31, 37, 47, 55, 30, 40, 51, 45, 33, 48, 44,
49, 39, 56, 34, 53, 46, 42, 50, 36, 29, 32
}; // 48
/** * E （ 32 48） */
static final int[] E = {
32, 1, 2, 3, 4, 5, 4, 5, 6, 7, 8, 9, 8, 9, 10, 11, 12, 13, 12, 13,
14, 15, 16, 17, 16, 17, 18, 19, 20, 21, 20, 21, 22, 23, 24, 25, 24,
25, 26, 27, 28, 29, 28, 29, 30, 31, 32, 1
}; // 48
static final int[] P = {
16, 7, 20, 21, 29, 12, 28, 17, 1, 15, 23, 26, 5, 18, 31, 10, 2, 8,
24, 14, 32, 27, 3, 9, 19, 13, 30, 6, 22, 11, 4, 25
}; // 32
static final int[][][] S_Box = {
{
{ 14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7 },
{ 0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8 },
{ 4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0 },
{ 15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13 }
},
{ // S_Box[1]
{ 15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10 },
{ 3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5 },
{ 0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15 },
{ 13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9 }
},
{ // S_Box[2]
{ 10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8 },
{ 13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1 },
{ 13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7 },
{ 1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12 }
},
{ // S_Box[3]
{ 7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15 },
{ 13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9 },
{ 10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4 },
{ 3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14 }
},
{ // S_Box[4]
{ 2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9 },
{ 14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6 },
{ 4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14 },
{ 11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3 }
},
{ // S_Box[5]
{ 12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11 },
{ 10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8 },
{ 9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6 },
{ 4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13 }
},
{ // S_Box[6]
{ 4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1 },
{ 13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6 },
{ 1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2 },
{ 6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12 }
},
{ // S_Box[7]
{ 13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7 },
{ 1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2 },
{ 7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8 },
{ 2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11 }
} // S_Box[8]
};
static final int[] LeftMove = {
1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1
}; //
}//
package cryptology;
import java.util.HashMap;
/** * Created by leif on 2016/6/21. */
public class util {
/** * * @param two string * @return int */
public static int two2ten(String two){
String s = two;
int x = 0;
int pow = 0;
for (int i = s.length() - 1; i >= 0; i--) {
x += Math.pow(2, pow) * (s.charAt(i) == '1' ? 1 : 0);
pow ++;
}
return x;
}
/** * * @param two string * @return int */
public static String two2hex(String bString){
if (bString == null || bString.equals("") || bString.length() % 8 != 0)
return null;
StringBuffer tmp = new StringBuffer();
int iTmp = 0;
for (int i = 0; i < bString.length(); i += 4)
{
iTmp = 0;
for (int j = 0; j < 4; j++)
{
iTmp += Integer.parseInt(bString.substring(i + j, i + j + 1)) << (4 - j - 1);
}
tmp.append(Integer.toHexString(iTmp));
}
return tmp.toString();
}
/** * 64 int 64 char * @param mm int[64] * @return char[64] */
public static char[] int64tochar64(int[] mm){
@SuppressWarnings("unused")
char[] g = new char[64];
String gg = new String();
for (int i = 0; i < 64; i++){
gg += mm[i];
}
return gg.toCharArray();
}
public static HashMap<Integer,char[]> preMI(String mmmmmm){
String lmmmmmm = "";
for(int i = 0; i < mmmmmm.length(); i++){
lmmmmmm += Integer.toBinaryString(Integer.parseInt(mmmmmm.substring(i,i+1)));
}
HashMap<Integer, char[] > tmmm = new HashMap<>();
char mmmmm[] = lmmmmmm.toCharArray();
char rm[] = new char[64];
int j = 0;
for(int i = 0; i < lmmmmmm.length(); i++){
rm[i%64] = mmmmm[i];
if (i % 64 == 63) {
tmmm.put(j, rm);
j++;
}
}
return tmmm;
}
/** * ， 64bit string * @param all * @return */
public static String[] all2string(String all) {
byte byteall[] = all.getBytes();
String allstring[] = new String[all.length()];
for(int i = 0; i < byteall.length; i++){
allstring[i] = String.format("%064d", Integer.parseInt(Integer.toBinaryString(byteall[i])));
}
return allstring;
}
/** * ， 64bit string * @param all * @return */
public static String[] all222string(String all) {
String allstring[] = new String[all.length()/64];
for(int i = 0; i < allstring.length; i++){
allstring[i] = all.substring(i*64,(i+1)*64);
}
return allstring;
}
/** * byte string， * @param all * @return */
public static String byte2string(String all) {
byte allstring[] = new byte[all.length()/64];
for(int i = 0; i < allstring.length; i++){
allstring[i] = (byte) two2ten(all.substring(i*64,(i+1)*64).substring(56, 64));
}
return new String(allstring);
}
/** * hash ， char[64] * @param k * @return */
public static char[] keypre(String k) {
String ha = String.format("%08d", k.hashCode());
String kk = "";
for(int i = 0; i < 8; i++){
kk += String.format("%08d", Integer.parseInt(Integer.toBinaryString(Integer.parseInt(ha.substring(i, i+1)))));
}
return kk.toCharArray();
}
}