转载地址:http://blog.csdn.net/xfworld/article/details/6046968
DES(Data Encryption Standard)算法,于1977年得到美国政府的正式许可,是一种用56位密钥来加密64位数据的方法。一般密码长度为8个字节,其中56位加密密钥,每个第8位都用作奇偶校验。
DES的几种工作方式
第一种电子密本方式(ECB)
将明文分成n个64比特分组,如果明文长度不是64比特的倍数,则在明文末尾填充适当数目的规定符号。对明文组用给定的密钥分别进行加密,行密文C=(C0,C1,……,Cn-1)其中Ci=DES(K,xi),i=0,1,…..,n-1。
第二种密文分组链接方式(CBC)
在CBC方式下,每个明文组xi在加密前与先一组密文按位模二加后,再送到DES加密,CBC方式克服了ECB方式报内组重的缺点,但由于明文组加密前与一组密文有关,因此前一组密文的错误会传播到下一组。
第三种密文反馈方式(CFB),可用于序列密码
明文X=(x0,x1,……,xn-1),其中xi由t个比特组成0 第四种输出反馈方式(OFB),可用于序列密码
与CFB唯一不同的是OFB是直接取DES输出的t个比特,而不是取密文的t个比特,其余都与CFB相同。但它取的是DES的输出,所以它克服了CFB的密文错误传播的缺点
DES的几种填补方式
DES是对64位数据的加密算法,如数据位数不足64位的倍数,需要填充,补充到64位的倍数。
NoPadding
API或算法本身不对数据进行处理,加密数据由加密双方约定填补算法。例如若对字符串数据进行加解密,可以补充/0或者空格,然后trim
PKCS5Padding
加密前:数据字节长度对8取余,余数为m,若m>0,则补足8-m个字节,字节数值为8-m,即差几个字节就补几个字节,字节数值即为补充的字节数,若为0则补充8个字节的8
解密后:取最后一个字节,值为m,则从数据尾部删除m个字节,剩余数据即为加密前的原文
SSL3Padding
SSL3.0协议定义的填补算法
java默认的DES算法实现方式为DES/ECB/PKCS5Padding。若c++或其他语言与java进行加解密互通,若java采用默认实现,另一方工作方式和填补算法必须都是用ECB和PKCS5Padding。
以下为java和C++可以互通的加解密算法
- import java.lang.reflect.*;
- import sun.misc.BASE64Encoder;
- public class des_zm {
- /*
- * static final是表示了只读,切能在同一个进程空间内的多个 Instance间共享
- */
- private static String strDefaultKey = "testpass";
- public String digestHexStr;
- // 28
- static final int pc_1_cp[] = { 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 };
- // 28
- static final int pc_1_dp[] = { 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 };
- // 48
- static final int pc_2p[] = { 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 };
- // 16
- static final int ls_countp[] = { 1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2,
- 2, 1 };
- // 64
- static final int iip_tab_p[] = { 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 _iip_tab_p[] = { 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 };
- // 48
- static final int e_r_p[] = { 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 };
- // 32
- static final int local_PP[] = { 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 };
- // [8][4][16]
- static final int ccom_SSS_p[][][] = {
- { { 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 } },
- { { 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 } },
- { { 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 } },
- { { 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 } }, /*
- * err
- * on
- */
- { { 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 }, /*
- * err
- * on
- */
- { 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 } },
- { { 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 } },
- { { 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 } },
- { { 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 } } };
- byte[][] C = new byte[17][28];
- byte[][] D = new byte[17][28];
- byte[][] K = new byte[17][48];
- public des_zm() {
- return;
- }
- /*
- * iu2b把int转换成byte
- */
- private static byte iu2b(int input) {
- byte output1;
- output1 = (byte) (input & 0xff);
- return output1;
- }
- /*
- * b2iu把byte按照不考虑正负号的原则的"升位"成int程序, 因为java没有unsigned运算
- */
- private static int b2iu(byte b) {
- return b < 0 ? b & 0x7F + 128 : b;
- }
- /*
- * byteHEX(),用来把一个byte类型的数转换成十六进制的ASCII表示,
- * 因为java中的byte的toString无法实现这一点,我们又没有C语言中的 sprintf(outbuf,"%02X",ib)
- */
- public static String byteHEX(byte ib) {
- char[] Digit = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A',
- 'B', 'C', 'D', 'E', 'F' };
- char[] ob = new char[2];
- ob[0] = Digit[(ib >>> 4) & 0X0F];
- ob[1] = Digit[ib & 0X0F];
- String s = new String(ob);
- return s;
- }
- /*
- * desMemcpy是一个内部使用的byte数组的块拷贝函数, 从input的inpos开始把len长度的
- * 字节拷贝到output的outpos位置开始
- */
- private void desMemcpy(byte[] output, byte[] input, int outpos, int inpos,
- int len) {
- int i;
- for (i = 0; i < len; i++)
- output[outpos + i] = input[inpos + i];
- }
- private void Fexpand0(byte[] in, byte[] out) {
- int divide;
- int i, j;
- byte temp1;
- for (i = 0; i < 8; i++) {
- divide = 7;
- for (j = 0; j < 8; j++) {
- temp1 = in[i];
- out[8 * i + j] = iu2b((b2iu(temp1) >>> divide) & 1);
- divide--;
- }
- }
- }
- private void FLS(byte[] bits, byte[] buffer, int count) {
- int i, j;
- for (i = 0; i < 28; i++) {
- buffer[i] = bits[(i + count) % 28];
- }
- }
- private void Fson(byte[] cc, byte[] dd, byte[] kk) {
- int i, j;
- byte[] buffer = new byte[56];
- for (i = 0; i < 28; i++)
- buffer[i] = cc[i];
- for (i = 28; i < 56; i++)
- buffer[i] = dd[i - 28];
- for (i = 0; i < 48; i++)
- kk[i] = buffer[pc_2p[i] - 1];
- }
- private void Fsetkeystar(byte[] bits) {
- int i, j;
- for (i = 0; i < 28; i++)
- C[0][i] = bits[pc_1_cp[i] - 1];
- for (i = 0; i < 28; i++)
- D[0][i] = bits[pc_1_dp[i] - 1];
- for (j = 0; j < 16; j++) {
- FLS(C[j], C[j + 1], ls_countp[j]);
- FLS(D[j], D[j + 1], ls_countp[j]);
- Fson(C[j + 1], D[j + 1], K[j + 1]);
- }
- }
- private void Fiip(byte[] text, byte[] ll, byte[] rr) {
- int i, j;
- byte[] buffer = new byte[64];
- byte[] tmp = new byte[64];
- Fexpand0(text, buffer);
- for (i = 0; i < 32; i++)
- ll[i] = buffer[iip_tab_p[i] - 1];
- for (i = 0; i < 32; i++)
- rr[i] = buffer[iip_tab_p[i + 32] - 1];
- }
- private void Fs_box(byte[] aa, byte[] bb) {
- int i, j, k, m;
- int y, z;
- byte[] ss = new byte[8];
- m = 0;
- for (i = 0; i < 8; i++) {
- j = 6 * i;
- y = b2iu(aa[j]) * 2 + b2iu(aa[j + 5]);
- z = b2iu(aa[j + 1]) * 8 + b2iu(aa[j + 2]) * 4 + b2iu(aa[j + 3]) * 2
- + b2iu(aa[j + 4]);
- ss[i] = iu2b(ccom_SSS_p[i][y][z]);
- y = 3;
- for (k = 0; k < 4; k++) {
- bb[m++] = iu2b((b2iu(ss[i]) >>> y) & 1);
- y--;
- }
- }
- }
- private void FF(int n, byte[] ll, byte[] rr, byte[] LL, byte[] RR) {
- int i, j;
- byte[] buffer = new byte[64], tmp = new byte[64];
- for (i = 0; i < 48; i++)
- buffer[i] = rr[e_r_p[i] - 1];
- for (i = 0; i < 48; i++)
- buffer[i] = iu2b((b2iu(buffer[i]) + b2iu(K[n][i])) & 1);
- Fs_box(buffer, tmp);
- for (i = 0; i < 32; i++)
- buffer[i] = tmp[local_PP[i] - 1];
- for (i = 0; i < 32; i++)
- RR[i] = iu2b((b2iu(buffer[i]) + b2iu(ll[i])) & 1);
- for (i = 0; i < 32; i++)
- LL[i] = rr[i];
- }
- private void _Fiip(byte[] text, byte[] ll, byte[] rr) {
- int i, j;
- byte[] tmp = new byte[64];
- for (i = 0; i < 32; i++)
- tmp[i] = ll[i];
- for (i = 32; i < 64; i++)
- tmp[i] = rr[i - 32];
- for (i = 0; i < 64; i++)
- text[i] = tmp[_iip_tab_p[i] - 1];
- }
- private void Fcompress016(byte[] out, byte[] in) {
- int times;
- int i, j;
- for (i = 0; i < 16; i++) {
- times = 3;
- in[i] = '0';
- for (j = 0; j < 4; j++) {
- in[i] = iu2b(b2iu(in[i]) + (b2iu(out[i * 16 + j]) << times));
- times--;
- }
- }
- }
- void Fcompress0(byte[] out, byte[] in) {
- int times;
- int i, j;
- for (i = 0; i < 8; i++) {
- times = 7;
- in[i] = 0;
- for (j = 0; j < 8; j++) {
- in[i] = iu2b(b2iu(in[i]) + (b2iu(out[i * 8 + j]) << times));
- times--;
- }
- }
- }
- private void Fencrypt0(byte[] text, byte[] mtext) {
- byte[] ll = new byte[64], rr = new byte[64], LL = new byte[64], RR = new byte[64];
- byte[] tmp = new byte[64];
- int i, j;
- Fiip(text, ll, rr);
- for (i = 1; i < 17; i++) {
- FF(i, ll, rr, LL, RR);
- for (j = 0; j < 32; j++) {
- ll[j] = LL[j];
- rr[j] = RR[j];
- }
- }
- _Fiip(tmp, rr, ll);
- Fcompress0(tmp, mtext);
- }
- private void FDES(byte[] key, byte[] text, byte[] mtext) {
- byte[] tmp = new byte[64];
- Fexpand0(key, tmp);
- Fsetkeystar(tmp);
- Fencrypt0(text, mtext);
- }
- /* 加密 */
- public int ENCRYPT(byte[] key, byte[] s, byte[] d, int len) {
- int i, j;
- byte[] cData = new byte[8];
- byte[] cEncryptData = new byte[8];
- for (i = 0; i < len; i += 8) {
- if ((i + 8) > len) {
- desMemcpy(cData, s, 0, i, len - i);
- for (j = len - i; j < 8; j++)
- cData[j] = 0;
- } else
- desMemcpy(cData, s, 0, i, 8);
- FDES(key, cData, cEncryptData);
- desMemcpy(d, cEncryptData, i, 0, 8);
- }
- return i;
- }
- private void Fdiscrypt0(byte[] mtext, byte[] text) {
- byte[] ll = new byte[64], rr = new byte[64], LL = new byte[64], RR = new byte[64];
- byte[] tmp = new byte[64];
- int i, j;
- Fiip(mtext, ll, rr);
- for (i = 16; i > 0; i--) {
- FF(i, ll, rr, LL, RR);
- for (j = 0; j < 32; j++) {
- ll[j] = LL[j];
- rr[j] = RR[j];
- }
- }
- _Fiip(tmp, rr, ll);
- Fcompress0(tmp, text);
- }
- /***************************************************************************
- * function: DES parameter: u_char * key ; key for encrypt u_char * mtext ;
- * encipher data u_char * text ; plain data return: none
- **************************************************************************/
- private void _FDES(byte[] key, byte[] mtext, byte[] text) {
- byte[] tmp = new byte[64];
- Fexpand0(key, tmp);
- Fsetkeystar(tmp);
- Fdiscrypt0(mtext, text);
- }
- /* 解密 */
- public int DECRYPT(byte[] key, byte[] s, byte[] d, int len) {
- int i;
- byte[] cData = new byte[8];
- byte[] cEncryptData = new byte[8];
- for (i = 0; i < len; i += 8) {
- desMemcpy(cEncryptData, d, 0, i, 8);
- _FDES(key, cEncryptData, cData);
- desMemcpy(s, cData, i, 0, 8);
- }
- return i;
- }
- public static byte[] hexStr2ByteArr(String strIn) {
- byte[] arrB = strIn.getBytes();
- int iLen = arrB.length;
- // 两个字符表示一个字节,所以字节数组长度是字符串长度除以2
- byte[] arrOut = new byte[iLen / 2];
- for (int i = 0; i < iLen; i = i + 2) {
- String strTmp = new String(arrB, i, 2);
- arrOut[i / 2] = (byte) Integer.parseInt(strTmp, 16);
- }
- return arrOut;
- }
- public static void main(String args[]) {
- des_zm m = new des_zm();
- String s = "111111";
- String miwen = m.Encode(s);
- System.out.println("密文:[" + miwen + "]");
- String minwen = m.Decode(miwen).toString();
- System.out.println("明文:[" + minwen + "]");
- }
- public String Encode(String str) {
- int i1;
- String digestHexStr;
- byte[] byte2 = new byte[3000];
- byte[] byte1 = str.getBytes();
- i1 = ENCRYPT(strDefaultKey.getBytes(), byte1, byte2, byte1.length);
- digestHexStr = "";
- for (int i = 0; i < i1; i++) {
- digestHexStr += byteHEX(byte2[i]);
- }
- return digestHexStr;
- }
- public String Decode(String str) {
- int i2;
- byte[] byteMingW = new byte[3000]; // 密文
- byte[] byteMiW = new byte[3000];
- des_zm m = new des_zm();
- byteMiW = m.hexStr2ByteArr(str);
- i2 = m.DECRYPT(m.strDefaultKey.getBytes(), byteMingW, byteMiW,
- byteMiW.length);
- BASE64Encoder base64encoder = new BASE64Encoder();
- return new String(byteMingW, 0, i2);
- }
- }
C++
- // testdes_.cpp : 定义控制台应用程序的入口点。
- //
- #include "stdafx.h"
- #define KEY "testtest"
- #define u_char unsigned char
- #define _u8 unsigned char
- #define _u16 unsigned short
- #define _u32 unsigned int
- void FDES(u_char *key,u_char *text,u_char *mtext);
- void _FDES(u_char *key,u_char *mtext,u_char *text);
- void Fencrypt0(u_char *text,u_char *mtext);
- void Fdiscrypt0(u_char *mtext,u_char *text);
- void Fexpand0(u_char *in,u_char *out);
- void Fcompress0(u_char *out,u_char *in);
- void Fcompress016(u_char *out,u_char *in);
- void Fsetkeystar(u_char bits[64]);
- void FLS(u_char *bits,u_char *buffer,int count);
- void Fson(u_char *cc,u_char *dd,u_char *kk);
- void Fiip(u_char *text,u_char *ll,u_char *rr);
- void _Fiip(u_char *text,u_char *ll,u_char *rr);
- void FF(int n,u_char *ll,u_char *rr,u_char *LL,u_char *RR);
- void Fs_box(u_char *aa,u_char *bb);
- u_char C[17][28],D[17][28],K[17][48];
- int DECRYPT( u_char *key, unsigned char *s,unsigned char *d, unsigned short len );
- int ENCRYPT( u_char *key, unsigned char *s,unsigned char *d,unsigned short len );
- int _tmain(int argc, _TCHAR* argv[])
- {
- printf("len=[%d]/n",3);
- int len,i,n;
- char str[100]; //明文
- char mstr[100]; //密文
- memset(str,0,sizeof(str)); //增加
- strcpy(str,"111111");
- printf("明文=[%s]/n",str);
- printf("密钥=[%s]/n",KEY);
- len=strlen(str);
- //加密
- i=ENCRYPT( (unsigned char *)KEY, (unsigned char *)str,(unsigned char *)mstr,len );
- printf("len=[%d]/n",len);
- printf("密文=[/n");
- for (n = 0; n < i; n++)
- {
- printf("%02X", mstr[n] & 0x00FF ); //增加
- }
- printf("]/n");
- printf("i=[%d]/n",i);
- memset(str,0,sizeof(str));
- //解密
- i=DECRYPT((unsigned char *) KEY, (unsigned char *)str,(unsigned char *)mstr, len );
- printf("len=[%d]/n",len);
- printf("明文=[%s]/n",str);
- printf("i=[%d]/n",i);
- }
- /*****************************************************************************
- * function: DES
- * parameter: u_char * key ; key for encrypt
- * u_char * text ; plain text
- * u_char * mtext ; encipher result
- * return: none
- *****************************************************************************/
- void FDES(u_char *key,u_char *text,u_char *mtext)
- {
- u_char tmp[64];
- Fexpand0(key,tmp);
- Fsetkeystar(tmp);
- Fencrypt0(text,mtext);
- }
- /*****************************************************************************
- * function: DES
- * parameter: u_char * key ; key for encrypt
- * u_char * mtext ; encipher data
- * u_char * text ; plain data
- * return: none
- *****************************************************************************/
- void _FDES(u_char *key,u_char *mtext,u_char *text)
- {
- u_char tmp[64];
- Fexpand0(key,tmp);
- Fsetkeystar(tmp);
- Fdiscrypt0(mtext,text);
- }
- void Fencrypt0(u_char *text,u_char *mtext)
- {
- u_char ll[64],rr[64],LL[64],RR[64];
- u_char tmp[64];
- int i,j;
- Fiip(text,ll,rr);
- for (i=1;i<17;i++)
- {
- FF(i,ll,rr,LL,RR);
- for (j=0;j<32;j++)
- {
- ll[j]=LL[j];
- rr[j]=RR[j];
- }
- }
- _Fiip(tmp,rr,ll);
- Fcompress0(tmp,mtext);
- }
- void Fdiscrypt0(u_char *mtext,u_char *text)
- {
- u_char ll[64],rr[64],LL[64],RR[64];
- u_char tmp[64];
- int i,j;
- Fiip(mtext,ll,rr);
- for (i=16;i>0;i--)
- {
- FF(i,ll,rr,LL,RR);
- for (j=0;j<32;j++)
- {
- ll[j]=LL[j];
- rr[j]=RR[j];
- }
- }
- _Fiip(tmp,rr,ll);
- Fcompress0(tmp,text);
- }
- void Fexpand0(u_char *in,u_char *out)
- {
- int divide;
- int i,j;
- for (i=0;i<8;i++)
- {
- divide=0x80;
- for (j=0;j<8;j++)
- {
- *out++=(in[i]/divide)&1;
- divide/=2;
- }
- }
- }
- void Fcompress0(u_char *out,u_char *in)
- {
- int times;
- int i,j;
- for (i=0;i<8;i++)
- {
- times=0x80;
- in[i]=0;
- for (j=0;j<8;j++)
- {
- in[i]+=(*out++)*times;
- times/=2;
- }
- }
- }
- void Fcompress016(u_char *out,u_char *in)
- {
- int times;
- int i,j;
- for (i=0;i<16;i++)
- {
- times=0x8;
- in[i]='0';
- for (j=0;j<4;j++)
- {
- in[i]+=(*out++)*times;
- times/=2;
- }
- }
- }
- int pc_1_cp[28]={
- 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};
- int pc_1_dp[28]={
- 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};
- int pc_2p[48]={
- 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};
- int ls_countp[16]={
- 1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};
- void Fsetkeystar(u_char bits[64])
- {
- int i,j;
- for (i=0;i<28;i++)
- C[0][i]=bits[pc_1_cp[i]-1];
- for (i=0;i<28;i++)
- D[0][i]=bits[pc_1_dp[i]-1];
- for (j=0;j<16;j++)
- {
- FLS(C[j],C[j+1],ls_countp[j]);
- FLS(D[j],D[j+1],ls_countp[j]);
- Fson(C[j+1],D[j+1],K[j+1]);
- }
- }
- void FLS(u_char *bits,u_char *buffer,int count)
- {
- int i,j;
- for (i=0;i<28;i++)
- {
- buffer[i]=bits[(i+count)%28];
- }
- }
- void Fson(u_char *cc,u_char *dd,u_char *kk)
- {
- int i,j;
- u_char buffer[56];
- for (i=0;i<28;i++)
- buffer[i]=*cc++;
- for (i=28;i<56;i++)
- buffer[i]=*dd++;
- for (i=0;i<48;i++)
- *kk++=buffer[pc_2p[i]-1];
- }
- int iip_tab_p[64]={
- 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};
- int _iip_tab_p[64]={
- 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};
- void Fiip(u_char *text,u_char *ll,u_char *rr)
- {
- int i,j;
- u_char buffer[64];
- u_char tmp[64];
- Fexpand0(text,buffer);
- for (i=0;i<32;i++)
- ll[i]=buffer[iip_tab_p[i]-1];
- for (i=0;i<32;i++)
- rr[i]=buffer[iip_tab_p[i+32]-1];
- }
- void _Fiip(u_char *text,u_char *ll,u_char *rr)
- {
- int i,j;
- u_char tmp[64];
- for (i=0;i<32;i++)
- tmp[i]=ll[i];
- for (i=32;i<64;i++)
- tmp[i]=rr[i-32];
- for (i=0;i<64;i++)
- text[i]=tmp[_iip_tab_p[i]-1];
- }
- int e_r_p[48]={
- 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};
- int local_PP[32]={
- 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};
- int ccom_SSS_p[8][4][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,/* err on */
- 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,
- 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,
- 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,
- 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, /* err on */
- 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, /* err on */
- 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,
- 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,
- 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,
- 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};
- void FF(int n,u_char *ll,u_char *rr,u_char *LL,u_char *RR)
- {
- int i,j;
- u_char buffer[64],tmp[64];
- for (i=0;i<48;i++)
- buffer[i]=rr[e_r_p[i]-1];
- for (i=0;i<48;i++)
- buffer[i]=(buffer[i]+K[n][i])&1;
- Fs_box(buffer,tmp);
- for (i=0;i<32;i++)
- buffer[i]=tmp[local_PP[i]-1];
- for (i=0;i<32;i++)
- RR[i]=(buffer[i]+ll[i])&1;
- for (i=0;i<32;i++)
- LL[i]=rr[i];
- }
- void Fs_box(u_char *aa,u_char *bb)
- {
- int i,j,k,m;
- int y,z;
- u_char ss[8];
- m=0;
- for (i=0;i<8;i++)
- {
- j=6*i;
- y=aa[j]*2+aa[j+5];
- z=aa[j+1]*8+aa[j+2]*4+aa[j+3]*2+aa[j+4];
- ss[i]=ccom_SSS_p[i][y][z];
- y=0x08;
- for (k=0;k<4;k++)
- {
- bb[m++]=(ss[i]/y)&1;
- y/=2;
- }
- }
- }
- int ENCRYPT( u_char *key, _u8 *s,_u8 *d,_u16 len )
- {
- int i;
- for(i=0;i<len;i+=8)FDES(key,s+i,d+i);
- // return len;
- return i;
- }
- /*解密*/
- int DECRYPT( u_char *key, _u8 *s,_u8 *d, _u16 len )
- {
- int i;
- for(i=0;i<len;i+=8)_FDES(key,d+i,s+i);
- // return len;
- return i;
- }