DES java实现 只是简单的对string的加解密

package myDes; /** * DESZ中用到的置换扩展表 * @author Li * */ public class DES_Table { /** * 初始数据置换表 （initial permutation） */ public static final int [] IP = { // 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 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 /** * P置换 */ public static final int [] P = {// 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 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 }; /** * 末置换表 （final permutation） 是初始置换的逆过程 */ public static final int [] FP = { // 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 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 }; /** * 密钥压缩置换表 从64-->56 */ public static final int [] PC_1 = { // 1 2 3 4 5 6 7 8 9 10 11 12 13 14 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 /** * 每轮循环左移的位数 */ public static final int [] moveLeft = { // 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1, 1, 2 , 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1 }; /** * * 密钥压缩置换表 从56-->48 */ public static final int [] PC_2 = { // 1 2 3 4 5 6 7 8 9 10 11 12 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 /** * 把右半部分Ri 32位的数据扩转成48位 */ public static final int[] E= { // 1 2 3 4 5 6 7 8 9 10 11 12 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 /** *S1盒 把R和密匙亦或后的数据从48位压缩到32位 */ public static final int[][][] S={ { // 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 { 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 } },//64 //public static final int[][] S2= { //1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 { 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 } },//64 // public static final int[][] S3= { { 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 } },//64 // public static final int[][] S4= { { 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 } },//64 // public static final int[][] S5= { { 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 } },//64 //public static final int[][] S6= { { 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 } },//64 //public static final int[][] S7= { { 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 } },//64 // public static final int[][] S8= { { 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 } } };//64 }