------------------------SubKey.java-------------------
public class SubKey {
? private String inKey;
? private StringBuffer keyBuf;
? private byte[] key=new byte[64];
? /*實驗性數(shù)據(jù)
? private static byte[] key={
? 0,0,0,1,0,0,1,1, 0,0,1,1,0,1,0,0, 0,1,0,1,0,1,1,1, 0,1,1,1,1,0,0,1,
? 1,0,0,1,1,0,1,1, 1,0,1,1,1,1,0,0, 1,1,0,1,1,1,1,1,1,1,1,1,0,0,0,1
? };
? */
? private byte[] kwork=new byte[56];
? private static byte[] shift={?1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1 };
? protected byte[] k1=new byte[48];
? protected byte[] k2=new byte[48];
? protected byte[] k3=new byte[48];
? protected byte[] k4=new byte[48];
? protected byte[] k5=new byte[48];
? protected byte[] k6=new byte[48];
? protected byte[] k7=new byte[48];
? protected byte[] k8=new byte[48];
? protected byte[] k9=new byte[48];
? protected byte[] k10=new byte[48];
? protected byte[] k11=new byte[48];
? protected byte[] k12=new byte[48];
? protected byte[] k13=new byte[48];
? protected byte[] k14=new byte[48];
? protected byte[] k15=new byte[48];
? protected byte[] k16=new byte[48];?
? protected byte[] kn=new byte[48];
?
? public SubKey(String inKey) {
? ?
? ?byte j;
? ?this.inKey=inKey;
? ?int len=inKey.length();
? ?
? ?//密鑰必須是8位，若小于8位不夠的補空格 ，大于8位取前8位
? ?keyBuf=new StringBuffer(inKey);
? ?if (len<8){
? ??for (int i = 1; i<=8-len; i++)
? ???keyBuf.append("?");
?}?
? ?inKey=keyBuf.toString();
? ?
? ?//將8個字符的密鑰轉(zhuǎn)換成64位二進制表示
? ?for (int i = 0; i<8; i++) {
? ??j=(byte)(inKey.charAt(i));
? ??key[8*i]=(byte)((j/128)%2);
? ??key[8*i+1]=(byte)((j/64)%2);
? ??key[8*i+2]=(byte)((j/32)%2);
? ??key[8*i+3]=(byte)((j/16)%2);
? ??key[8*i+4]=(byte)((j/8)%2);
? ??key[8*i+5]=(byte)((j/4)%2);
? ??key[8*i+6]=(byte)((j/2)%2);
? ??key[8*i+7]=(byte)(j%2);
?}
?/* Initial Permutation of Key */
?kwork[ 0] = key[56];
?kwork[ 1] = key[48];
?kwork[ 2] = key[40];
?kwork[ 3] = key[32];
?kwork[ 4] = key[24];
?kwork[ 5] = key[16];
?kwork[ 6] = key[ 8];
?kwork[ 7] = key[ 0];
?kwork[ 8] = key[57];
?kwork[ 9] = key[49];
?kwork[10] = key[41];
?kwork[11] = key[33];
?kwork[12] = key[25];
?kwork[13] = key[17];
?kwork[14] = key[ 9];
?kwork[15] = key[ 1];
?kwork[16] = key[58];
?kwork[17] = key[50];
?kwork[18] = key[42];
?kwork[19] = key[34];
?kwork[20] = key[26];
?kwork[21] = key[18];
?kwork[22] = key[10];
?kwork[23] = key[ 2];
?kwork[24] = key[59];
?kwork[25] = key[51];
?kwork[26] = key[43];
?kwork[27] = key[35];
?kwork[28] = key[62];
?kwork[29] = key[54];
?kwork[30] = key[46];
?kwork[31] = key[38];
?kwork[32] = key[30];
?kwork[33] = key[22];
?kwork[34] = key[14];
?kwork[35] = key[ 6];
?kwork[36] = key[61];
?kwork[37] = key[53];
?kwork[38] = key[45];
?kwork[39] = key[37];
?kwork[40] = key[29];
?kwork[41] = key[21];
?kwork[42] = key[13];
?kwork[43] = key[ 5];
?kwork[44] = key[60];
?kwork[45] = key[52];
?kwork[46] = key[44];
?kwork[47] = key[36];
?kwork[48] = key[28];
?kwork[49] = key[20];
?kwork[50] = key[12];
?kwork[51] = key[ 4];
?kwork[52] = key[27];
?kwork[53] = key[19];
?kwork[54] = key[11];
?kwork[55] = key[ 3];
?
?/* 子鍵計算開始*/
?byte nbrofshift;
?byte temp1,temp2;
?for (int iter = 0; iter<16; iter++) {
??nbrofshift = shift[iter];
??for (int i = 0; i < (int) nbrofshift; i++) {
???temp1 = kwork[0];
???temp2 = kwork[28];
???for (int k = 0; k < 27; k++) {
????kwork[k] = kwork[k+1];
????kwork[k+28] = kwork[k+29];
???}
???kwork[27] = temp1;
???kwork[55] = temp2;
??}
??/* Permute kwork - PC2 */
??kn[ 0] = kwork[13];
??kn[ 1] = kwork[16];
??kn[ 2] = kwork[10];
??kn[ 3] = kwork[23];
??kn[ 4] = kwork[ 0];
??kn[ 5] = kwork[ 4];
??kn[ 6] = kwork[ 2];
??kn[ 7] = kwork[27];
??kn[ 8] = kwork[14];
??kn[ 9] = kwork[ 5];
??kn[10] = kwork[20];
??kn[11] = kwork[ 9];
??kn[12] = kwork[22];
??kn[13] = kwork[18];
??kn[14] = kwork[11];
??kn[15] = kwork[ 3];
??kn[16] = kwork[25];
??kn[17] = kwork[ 7];
??kn[18] = kwork[15];
??kn[19] = kwork[ 6];
??kn[20] = kwork[26];
??kn[21] = kwork[19];
??kn[22] = kwork[12];
??kn[23] = kwork[ 1];
??kn[24] = kwork[40];
??kn[25] = kwork[51];
??kn[26] = kwork[30];
??kn[27] = kwork[36];
??kn[28] = kwork[46];
??kn[29] = kwork[54];
??kn[30] = kwork[29];
??kn[31] = kwork[39];
??kn[32] = kwork[50];
??kn[33] = kwork[44];
??kn[34] = kwork[32];
??kn[35] = kwork[47];
??kn[36] = kwork[43];
??kn[37] = kwork[48];
??kn[38] = kwork[38];
??kn[39] = kwork[55];
??kn[40] = kwork[33];
??kn[41] = kwork[52];
??kn[42] = kwork[45];
??kn[43] = kwork[41];
??kn[44] = kwork[49];
??kn[45] = kwork[35];
??kn[46] = kwork[28];
??kn[47] = kwork[31];
??/*
??for (int i = 0; i<48; i++) {
???if (i%6==0) System.out.print(" ");
???System.out.print(kn[i]);
???? }
??System.out.println ();
??*/
??switch(iter){
???case 0:
????for (int k = 0; k<48;k++) { k1[k]=kn[k]; }
????break;
???case 1:
????for (int k = 0; k<48;k++) { k2[k]=kn[k]; }
????break;
???case 2:
????for (int k = 0; k<48;k++) { k3[k]=kn[k]; }
????break;
???case 3:
????for (int k = 0; k<48;k++) { k4[k]=kn[k]; }
????break;
???case 4:
????for (int k = 0; k<48;k++) { k5[k]=kn[k]; }
????break;
???case 5:
????for (int k = 0; k<48;k++) { k6[k]=kn[k]; }
????break;
???case 6:
????for (int k = 0; k<48;k++) { k7[k]=kn[k]; }
????break;
???case 7:
????for (int k = 0; k<48;k++) { k8[k]=kn[k]; }
????break;
???case 8:
????for (int k = 0; k<48;k++) { k9[k]=kn[k]; }
????break;
???case 9:
????for (int k = 0; k<48;k++) { k10[k]=kn[k]; }
????break;
???case 10:
????for (int k = 0; k<48;k++) { k11[k]=kn[k]; }
????break;
???case 11:
????for (int k = 0; k<48;k++) { k12[k]=kn[k]; }
????break;
???case 12:
????for (int k = 0; k<48;k++) { k13[k]=kn[k]; }
????break;
???case 13:
????for (int k = 0; k<48;k++) { k14[k]=kn[k]; }
????break;
???case 14:
????for (int k = 0; k<48;k++) { k15[k]=kn[k]; }
????break;
???case 15:
????for (int k = 0; k<48;k++) { k16[k]=kn[k]; }
????break;
??}
?}
? }
}
------------------Des.java--------------------
public class Des {
? /* Table - s1 */
? protected static byte[][] s1 = {
? {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 }};
? /* Table - s2 */
? protected static byte[][] s2 = {
? {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 }};
? /* Table - s3 */
? protected static byte[][] 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 }};
? /* Table - s4 */
? protected static byte[][] 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 }};
? /* Table - s5 */
? protected static byte[][] 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 }};
? /* Table - s6 */
? protected static byte[][] 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 }};
? /* Table - s7 */
? protected static byte[][] 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}};
? /* Table - s8 */
? protected static byte[][] 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}};
? //用于 S盒查找以確定對應(yīng)的4位二進制數(shù)據(jù)＃
? protected static byte[] binary={
?0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 1,
?0, 1, 0, 0, 0, 1, 0, 1, 0, 1, 1, 0, 0, 1, 1, 1,
?1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 1, 0, 1, 0, 1, 1,
?1, 1, 0, 0, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 1 };
?
? //存儲將要加密的明文或?qū)⒁饷艿拿芪?
? protected byte[] workData=new byte[64];
? protected String dataSrc;
? protected String dataDest;
? /*實驗性數(shù)據(jù)
? protected static byte[] workData={
? 0,0,0,0,0,0,0,1, 0,0,1,0,0,0,1,1, 0,1,0,0,0,1,0,1, 0,1,1,0,0,1,1,1,
? 1,0,0,0,1,0,0,1, 1,0,1,0,1,0,1,1, 1,1,0,0,1,1,0,1, 1,1,1,0,1,1,1,1
? };
? */
? //用于數(shù)據(jù)變換中轉(zhuǎn)
? protected byte[] bufout=new byte[64];
? //最終生成的密文或解密所得的明文
? protected byte[] output=new byte[64];
? protected byte[] Ln=new byte[32];
? protected byte[] Rn=new byte[32];
? protected byte[] LR=new byte[32];
? protected byte[] ER=new byte[48];
? protected byte[] temp=new byte[32];
? protected byte[] result=new byte[8];
? protected byte[] ki;
? protected String key;
? protected int readLen;
? protected boolean encFlag;?? //1為加密，0為解密
? protected SubKey subKey;
?
? protected void convert4CharTo64bit(String data){
? ?for (int i = 0; i<64; i++) {
? ??workData[i]=0;
?}
?/* Convert from 4-char(coded in unicode) data into 64-bit data */
?for (int i = 0; i < readLen; i++) {
??int j=data.charAt(i);
??workData[16*i+0]=(byte)((j/32768)%2);
?? ?workData[16*i+1]=(byte)((j/16384)%2);
?? ?workData[16*i+2]=(byte)((j/8192)%2);
?? ?workData[16*i+3]=(byte)((j/4096)%2);
?? ?workData[16*i+4]=(byte)((j/2048)%2);
?? ?workData[16*i+5]=(byte)((j/1024)%2);
?? ?workData[16*i+6]=(byte)((j/512)%2);
?? ?workData[16*i+7]=(byte)((j/256)%2);
?? ?workData[16*i+8]=(byte)((j/128)%2);
?? ?workData[16*i+9]=(byte)((j/64)%2);
?? ?workData[16*i+10]=(byte)((j/32)%2);
?? ?workData[16*i+11]=(byte)((j/16)%2);
?? ?workData[16*i+12]=(byte)((j/8)%2);
?? ?workData[16*i+13]=(byte)((j/4)%2);
?? ?workData[16*i+14]=(byte)((j/2)%2);
?? ?workData[16*i+15]=(byte)(j%2);
? }
? }
? protected void convert64bitTo4Char(){??
?int j;
?char ch;
?StringBuffer strbuf=new StringBuffer();
?for (int i = 0; i<4; i++) {
??j=0;
??j=32768*output[16*i+0]+16384*output[16*i+1]+8192*output[16*i+2]+4096*output[16*i+3]+
??2048*output[16*i+4]+1024*output[16*i+5]+512*output[16*i+6]+256*output[16*i+7]+
??128*output[16*i+8]+64*output[16*i+9]+32*output[16*i+10]+16*output[16*i+11]+
??8*output[16*i+12]+4*output[16*i+13]+2*output[16*i+14]+output[16*i+15];
??ch=(char)j;?
??strbuf.append(ch);???
?}
?dataDest=strbuf.toString();
}
? protected void IP(){
? ?/* Initial Permutation of Data */
?bufout[ 0] = workData[57];
?bufout[ 1] = workData[49];
?bufout[ 2] = workData[41];
?bufout[ 3] = workData[33];
?bufout[ 4] = workData[25];
?bufout[ 5] = workData[17];
?bufout[ 6] = workData[ 9];
?bufout[ 7] = workData[ 1];
?bufout[ 8] = workData[59];
?bufout[ 9] = workData[51];
?bufout[10] = workData[43];
?bufout[11] = workData[35];
?bufout[12] = workData[27];
?bufout[13] = workData[19];
?bufout[14] = workData[11];
?bufout[15] = workData[ 3];
?bufout[16] = workData[61];
?bufout[17] = workData[53];
?bufout[18] = workData[45];
?bufout[19] = workData[37];
?bufout[20] = workData[29];
?bufout[21] = workData[21];
?bufout[22] = workData[13];
?bufout[23] = workData[ 5];
?bufout[24] = workData[63];
?bufout[25] = workData[55];
?bufout[26] = workData[47];
?bufout[27] = workData[39];
?bufout[28] = workData[31];
?bufout[29] = workData[23];
?bufout[30] = workData[15];
?bufout[31] = workData[ 7];
?bufout[32] = workData[56];
?bufout[33] = workData[48];
?bufout[34] = workData[40];
?bufout[35] = workData[32];
?bufout[36] = workData[24];
?bufout[37] = workData[16];
?bufout[38] = workData[ 8];
?bufout[39] = workData[ 0];
?bufout[40] = workData[58];
?bufout[41] = workData[50];
?bufout[42] = workData[42];
?bufout[43] = workData[34];
?bufout[44] = workData[26];
?bufout[45] = workData[18];
?bufout[46] = workData[10];
?bufout[47] = workData[ 2];
?bufout[48] = workData[60];
?bufout[49] = workData[52];
?bufout[50] = workData[44];
?bufout[51] = workData[36];
?bufout[52] = workData[28];
?bufout[53] = workData[20];
?bufout[54] = workData[12];
?bufout[55] = workData[ 4];
?bufout[56] = workData[62];
?bufout[57] = workData[54];
?bufout[58] = workData[46];
?bufout[59] = workData[38];
?bufout[60] = workData[30];
?bufout[61] = workData[22];
?bufout[62] = workData[14];
?bufout[63] = workData[ 6];
?
? }
?
? protected void XOR(byte[] op1,byte[] op2){
? ?int len=op1.length;
? ?for (int i = 0; i<len; i++) {
? ??op1[i]=(byte)(op1[i] ^ op2[i]);
?}
? }
?
? protected void expand32To48bit(byte[] op){
? ?/* Permute - E */
?ER[ 0] = op[31];
?ER[ 1] = op[ 0];
?ER[ 2] = op[ 1];
?ER[ 3] = op[ 2];
?ER[ 4] = op[ 3];
?ER[ 5] = op[ 4];
?ER[ 6] = op[ 3];
?ER[ 7] = op[ 4];
?ER[ 8] = op[ 5];
?ER[ 9] = op[ 6];
?ER[10] = op[ 7];
?ER[11] = op[ 8];
?ER[12] = op[ 7];
?ER[13] = op[ 8];
?ER[14] = op[ 9];
?ER[15] = op[10];
?ER[16] = op[11];
?ER[17] = op[12];
?ER[18] = op[11];
?ER[19] = op[12];
?ER[20] = op[13];
?ER[21] = op[14];
?ER[22] = op[15];
?ER[23] = op[16];
?ER[24] = op[15];
?ER[25] = op[16];
?ER[26] = op[17];
?ER[27] = op[18];
?ER[28] = op[19];
?ER[29] = op[20];
?ER[30] = op[19];
?ER[31] = op[20];
?ER[32] = op[21];
?ER[33] = op[22];
?ER[34] = op[23];
?ER[35] = op[24];
?ER[36] = op[23];
?ER[37] = op[24];
?ER[38] = op[25];
?ER[39] = op[26];
?ER[40] = op[27];
?ER[41] = op[28];
?ER[42] = op[27];
?ER[43] = op[28];
?ER[44] = op[29];
?ER[45] = op[30];
?ER[46] = op[31];
?ER[47] = op[ 0];
? }
? protected void sBox(){
? ?/* 8 s-functions */
? ?int valindex;
?valindex = s1[2*ER[ 0]+ER[ 5]][2*(2*(2*ER[ 1]+ER[ 2])+ ER[ 3])+ER[ 4]];
?valindex = valindex * 4;
?temp[ 0] = (byte)binary[0+valindex];
?temp[ 1] = (byte)binary[1+valindex];
?temp[ 2] = (byte)binary[2+valindex];
?temp[ 3] = (byte)binary[3+valindex];
?valindex = s2[2*ER[ 6]+ER[11]][2*(2*(2*ER[ 7]+ER[ 8])+ ER[ 9])+ER[10]];
?valindex = valindex = valindex * 4;?
?temp[ 4] = (byte)binary[0+valindex];
?temp[ 5] = (byte)binary[1+valindex];
?temp[ 6] = (byte)binary[2+valindex];
?temp[ 7] = (byte)binary[3+valindex];
?valindex = s3[2*ER[12]+ER[17]][2*(2*(2*ER[13]+ER[14])+ ER[15])+ER[16]];
?valindex = valindex = valindex * 4;
?temp[ 8] = (byte)binary[0+valindex];
?temp[ 9] = (byte)binary[1+valindex];
?temp[10] = (byte)binary[2+valindex];
?temp[11] = (byte)binary[3+valindex];
?valindex = s4[2*ER[18]+ER[23]][2*(2*(2*ER[19]+ER[20])+ER[21])+ER[22]];
?valindex = valindex = valindex * 4;
?temp[12] = (byte)binary[0+valindex];
?temp[13] = (byte)binary[1+valindex];
?temp[14] = (byte)binary[2+valindex];
?temp[15] = (byte)binary[3+valindex];
?valindex = s5[2*ER[24]+ER[29]][2*(2*(2*ER[25]+ER[26])+ER[27])+ER[28]];
?valindex = valindex = valindex * 4;
?temp[16] = (byte)binary[0+valindex];
?temp[17] = (byte)binary[1+valindex];
?temp[18] = (byte)binary[2+valindex];
?temp[19] = (byte)binary[3+valindex];
?valindex = s6[2*ER[30]+ER[35]][2*(2*(2*ER[31]+ER[32])+ ER[33])+ER[34]];
?valindex = valindex = valindex * 4;
?temp[20] = (byte)binary[0+valindex];
?temp[21] = (byte)binary[1+valindex];
?temp[22] = (byte)binary[2+valindex];
?temp[23] = (byte)binary[3+valindex];
?valindex = s7[2*ER[36]+ER[41]][2*(2*(2*ER[37]+ER[38])+ ER[39])+ER[40]];
?valindex = valindex = valindex * 4;
?temp[24] = (byte)binary[0+valindex];
?temp[25] = (byte)binary[1+valindex];
?temp[26] = (byte)binary[2+valindex];
?temp[27] = (byte)binary[3+valindex];
?valindex = s8[2*ER[42]+ER[47]][2*(2*(2*ER[43]+ER[44])+ ER[45])+ER[46]];
?valindex = valindex = valindex * 4;
?temp[28] = (byte)binary[0+valindex];
?temp[29] = (byte)binary[1+valindex];
?temp[30] = (byte)binary[2+valindex];
?temp[31] = (byte)binary[3+valindex];
? }
? protected void p(){
? ?/* Permute - P */
?Rn[ 0] = temp[15];
?Rn[ 1] = temp[ 6];
?Rn[ 2] = temp[19];
?Rn[ 3] = temp[20];
?Rn[ 4] = temp[28];
?Rn[ 5] = temp[11];
?Rn[ 6] = temp[27];
?Rn[ 7] = temp[16];
?Rn[ 8] = temp[ 0];
?Rn[ 9] = temp[14];
?Rn[10] = temp[22];
?Rn[11] = temp[25];
?Rn[12] = temp[ 4];
?Rn[13] = temp[17];
?Rn[14] = temp[30];
?Rn[15] = temp[ 9];
?Rn[16] = temp[ 1];
?Rn[17] = temp[ 7];
?Rn[18] = temp[23];
?Rn[19] = temp[13];
?Rn[20] = temp[31];
?Rn[21] = temp[26];
?Rn[22] = temp[ 2];
?Rn[23] = temp[ 8];
?Rn[24] = temp[18];
?Rn[25] = temp[12];
?Rn[26] = temp[29];
?Rn[27] = temp[ 5];
?Rn[28] = temp[21];
?Rn[29] = temp[10];
?Rn[30] = temp[ 3];
?Rn[31] = temp[24];
? }
? protected void IIP(){
?/* Inverse Initial Permutation */
?output[ 0] = bufout[39];
?output[ 1] = bufout[ 7];
?output[ 2] = bufout[47];
?output[ 3] = bufout[15];
?output[ 4] = bufout[55];
?output[ 5] = bufout[23];
?output[ 6] = bufout[63];
?output[ 7] = bufout[31];
?output[ 8] = bufout[38];
?output[ 9] = bufout[ 6];
?output[10] = bufout[46];
?output[11] = bufout[14];
?output[12] = bufout[54];
?output[13] = bufout[22];
?output[14] = bufout[62];
?output[15] = bufout[30];
?output[16] = bufout[37];
?output[17] = bufout[ 5];
?output[18] = bufout[45];
?output[19] = bufout[13];
?output[20] = bufout[53];
?output[21] = bufout[21];
?output[22] = bufout[61];
?output[23] = bufout[29];
?output[24] = bufout[36];
?output[25] = bufout[ 4];
?output[26] = bufout[44];
?output[27] = bufout[12];
?output[28] = bufout[52];
?output[29] = bufout[20];
?output[30] = bufout[60];
?output[31] = bufout[28];
?output[32] = bufout[35];
?output[33] = bufout[ 3];
?output[34] = bufout[43];
?output[35] = bufout[11];
?output[36] = bufout[51];
?output[37] = bufout[19];
?output[38] = bufout[59];
?output[39] = bufout[27];
?output[40] = bufout[34];
?output[41] = bufout[ 2];
?output[42] = bufout[42];
?output[43] = bufout[10];
?output[44] = bufout[50];
?output[45] = bufout[18];
?output[46] = bufout[58];
?output[47] = bufout[26];
?output[48] = bufout[33];
?output[49] = bufout[ 1];
?output[50] = bufout[41];
?output[51] = bufout[ 9];
?output[52] = bufout[49];
?output[53] = bufout[17];
?output[54] = bufout[57];
?output[55] = bufout[25];
?output[56] = bufout[32];
?output[57] = bufout[ 0];
?output[58] = bufout[40];
?output[59] = bufout[ 8];
?output[60] = bufout[48];
?output[61] = bufout[16];
?output[62] = bufout[56];
?output[63] = bufout[24];
? }
?
? public Des(String key){
? ?this.key=key;
? ?subKey=new SubKey(key);
? }
?
? //解密?
? public String enc(String dataSrc,int readLen) {
? ?this.dataSrc=dataSrc;
? ?this.readLen=readLen;
? ?convert4CharTo64bit(dataSrc);
? ?IP();
? ?for (int i = 0; i<32; i++) {
? ???Ln[i]=bufout[i];???? // L0
? ???Rn[i]=bufout[32+i];? //R0
?}? ?
? ?for (int iter = 1; iter<17; iter++) {
? ??for (int i = 0; i<32; i++) {
? ???LR[i]=Ln[i];????
? ???Ln[i]=Rn[i];
???? }? ?
??expand32To48bit(Rn);? //Rn-1 expand to 48 bit save to ER[]
?? ?switch(iter)
??{
???case 1:
????ki=subKey.k1; break;
???case 2:
????ki=subKey.k2; break;
???case 3:
????ki=subKey.k3; break;
???case 4:
????ki=subKey.k4; break;
???case 5:
????ki=subKey.k5; break;
???case 6:
????ki=subKey.k6; break;
???case 7:
????ki=subKey.k7; break;
???case 8:
????ki=subKey.k8; break;
???case 9:
????ki=subKey.k9; break;
???case 10:
????ki=subKey.k10; break;
???case 11:
????ki=subKey.k11; break;
???case 12:
????ki=subKey.k12; break;
???case 13:
????ki=subKey.k13; break;
???case 14:
????ki=subKey.k14; break;
???case 15:
????ki=subKey.k15; break;
???case 16:
????ki=subKey.k16; break;
?????
??}
??
??XOR(ER,ki);
? ??sBox();
? ??p();
? ??XOR(Rn,LR);
?}
?
?for (int i = 0; i<32; i++) {
??bufout[i]=Rn[i];
??bufout[32+i]=Ln[i];
??? }
??? IIP();
??? convert64bitTo4Char();
??? return dataDest;
?? }
? //加密
? public String dec(String dataSrc,int readLen){
? ?this.dataSrc=dataSrc;
? ?this.readLen=readLen;
? ?convert4CharTo64bit(dataSrc);
? ?IP();
? ?for (int i = 0; i<32; i++) {
? ???Ln[i]=bufout[i];???? // L0
? ???Rn[i]=bufout[32+i];? //R0
?}? ?
? ?for (int iter = 1; iter<17; iter++) {
? ??for (int i = 0; i<32; i++) {
? ???LR[i]=Ln[i];????
? ???Ln[i]=Rn[i];
???? }? ?
??expand32To48bit(Rn);? //Rn-1 expand to 48 bit save to ER[]
??switch(iter)
??{
???case 1:
????ki=subKey.k16; break;
???case 2:
????ki=subKey.k15; break;
???case 3:
????ki=subKey.k14; break;
???case 4:
????ki=subKey.k13; break;
???case 5:
????ki=subKey.k12; break;
???case 6:
????ki=subKey.k11; break;
???case 7:
????ki=subKey.k10; break;
???case 8:
????ki=subKey.k9; break;
???case 9:
????ki=subKey.k8; break;
???case 10:
????ki=subKey.k7; break;
???case 11:
????ki=subKey.k6; break;
???case 12:
????ki=subKey.k5; break;
???case 13:
????ki=subKey.k4; break;
???case 14:
????ki=subKey.k3; break;
???case 15:
????ki=subKey.k2; break;
???case 16:
????ki=subKey.k1; break;
?????
??}
??XOR(ER,ki);
? ??sBox();
? ??p();
? ??XOR(Rn,LR);
? ??
?}
?
?for (int i = 0; i<32; i++) {
??bufout[i]=Rn[i];
??bufout[32+i]=Ln[i];
??? }
??? IIP();
??? convert64bitTo4Char();
??? return dataDest;
? }
}
-----------------------FileDES.java--------------------
import java.io.*;
import java.nio.*;
import java.nio.channels.FileChannel;
public class FileDES{
?private static final boolean enc=true;??? //加密
?private static final boolean dec=false;?? //解密
?
?private String srcFileName;
?private String destFileName;
?private String inKey;
?private boolean actionType;
?private File srcFile;
?private File destFile;?
?private Des des;
?
?private void analyzePath(){
??String dirName;
??int pos=srcFileName.lastIndexOf("/");
??dirName=srcFileName.substring(0,pos);
??File dir=new File(dirName);
??if (!dir.exists()){
???System.err.println(dirName+" is not exist");
???System.exit(1);
??}else if(!dir.isDirectory()){
???System.err.println(dirName+" is not a directory");
???System.exit(1);
??}
??
??pos=destFileName.lastIndexOf("/");
??dirName=destFileName.substring(0,pos);
??dir=new File(dirName);
??if (!dir.exists()){
???if(!dir.mkdirs()){
????System.out.println ("can not creat directory:"+dirName);
????System.exit(1);
???}
??}else if(!dir.isDirectory()){
???System.err.println(dirName+" is not a directory");
???System.exit(1);
??}
?}
?
?private static int replenish(FileChannel channel,ByteBuffer buf) throws IOException{
??long byteLeft=channel.size()-channel.position();
??if(byteLeft==0L)
???return -1;
??buf.position(0);
??buf.limit(buf.position()+(byteLeft<8 ? (int)byteLeft :8));
??return channel.read(buf);
?}
?
?private void file_operate(boolean flag){
??des=new Des(inKey);
??FileOutputStream outputFile=null;
??try {
???outputFile=new FileOutputStream(srcFile,true);
???? }catch (java.io.FileNotFoundException e) {
???? ?e.printStackTrace(System.err);
???? }
???? FileChannel outChannel=outputFile.getChannel();
????
???? try{
????? if(outChannel.size()%2!=0){
????ByteBuffer bufTemp=ByteBuffer.allocate(1);
????bufTemp.put((byte)32);
????bufTemp.flip();???
????outChannel.position(outChannel.size());
????outChannel.write(bufTemp);
????? ?bufTemp.clear();??
???}
??}catch(Exception ex){
???ex.printStackTrace(System.err);
???System.exit(1);
??}
??FileInputStream inFile=null;
??try{
???inFile=new FileInputStream(srcFile);
??}catch(java.io.FileNotFoundException e){
???e.printStackTrace(System.err);
???//System.exit(1);
??}
??outputFile=null;
??try {
???outputFile=new FileOutputStream(destFile,true);
???? }catch (java.io.FileNotFoundException e) {
???? ?e.printStackTrace(System.err);
???? }
????
???? FileChannel inChannel=inFile.getChannel();
??outChannel=outputFile.getChannel();
??
??
??ByteBuffer inBuf=ByteBuffer.allocate(8);
??ByteBuffer outBuf=ByteBuffer.allocate(8);
??
??try{
???String srcStr;
???String destStr;
???while(true){
???
????if (replenish(inChannel,inBuf)==-1) break;
????srcStr=((ByteBuffer)(inBuf.flip())).asCharBuffer().toString();
????inBuf.clear();
????if (flag)
?????destStr=des.enc(srcStr,srcStr.length());
????else
?????destStr=des.dec(srcStr,srcStr.length());
?????? outBuf.clear();
?????? if (destStr.length()==4){
?????? ?for (int i = 0; i<4; i++) {
???? ????outBuf.putChar(destStr.charAt(i));
???? ???}
?????? ?outBuf.flip();
?????? }else{
?????? ?outBuf.position(0);
?????? ?outBuf.limit(2*destStr.length());
?????? ?for (int i = 0; i<destStr.length(); i++) {
???? ????outBuf.putChar(destStr.charAt(i));
???? ???}
?????? ?outBuf.flip();
?????? }
??????
?????? try {
???? ???outChannel.write(outBuf);
???? ???outBuf.clear();
???? ??}catch (java.io.IOException ex) {
???? ???ex.printStackTrace(System.err);
???? ??}
???}
???System.out.println (inChannel.size());
???? ?System.out.println (outChannel.size());
???System.out.println ("EoF reached.");
???inFile.close();
???outputFile.close();
??}catch(java.io.IOException e){
???e.printStackTrace(System.err);
???System.exit(1);
??}?
?}
?public FileDES(String srcFileName,String destFileName,String inKey,boolean actionType){
??this.srcFileName=srcFileName;
??this.destFileName=destFileName;??
??this.actionType=actionType;
??analyzePath();
??srcFile=new File(srcFileName);
??destFile=new File(destFileName);??
??this.inKey=inKey;
??if (actionType==enc)
???file_operate(enc);
??else
???file_operate(dec);
?}
?
?
?public static void main(String[] args){
??String file1=System.getProperty("user.dir")+"/111.doc";
??String file2=System.getProperty("user.dir")+"/222.doc";
??String file3=System.getProperty("user.dir")+"/333.doc";
??String passWord="1234ABCD";
??FileDES fileDes=new FileDES(file1,file2,passWord,true);
??FileDES fileDes1=new FileDES(file2,file3,passWord,false);
?}
?
}