import java.lang.reflect.*;
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/*******************************************************************************
* keyBean 類(lèi)實(shí)現(xiàn)了RSA Data Security, Inc.在提交給IETF 的RFC1321中的keyBean message-digest
* 算法。
******************************************************************************/
public class keyBean {
/*
* 下面這些S11-S44實(shí)際上是一個(gè)4*4的矩陣，在原始的C實(shí)現(xiàn)中是用#define 實(shí)現(xiàn)的， 這里把它們實(shí)現(xiàn)成為static
* final是表示了只讀，切能在同一個(gè)進(jìn)程空間內(nèi)的多個(gè) Instance間共享
*/
static final int S11 = 7;
static final int S12 = 12;
static final int S13 = 17;
static final int S14 = 22;
static final int S21 = 5;
static final int S22 = 9;
static final int S23 = 14;
static final int S24 = 20;
static final int S31 = 4;
static final int S32 = 11;
static final int S33 = 16;
static final int S34 = 23;
static final int S41 = 6;
static final int S42 = 10;
static final int S43 = 15;
static final int S44 = 21;
static final byte[] PADDING = { -128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0 };
/*
* 下面的三個(gè)成員是keyBean計(jì)算過(guò)程中用到的3個(gè)核心數(shù)據(jù)，在原始的C實(shí)現(xiàn)中 被定義到keyBean_CTX結(jié)構(gòu)中
*/
private long[] state = new long[4]; // state (ABCD)
private long[] count = new long[2]; // number of bits, modulo 2^64 (lsb
// first)
private byte[] buffer = new byte[64]; // input buffer
/*
* digestHexStr是keyBean的唯一一個(gè)公共成員，是最新一次計(jì)算結(jié)果的 16進(jìn)制ASCII表示.
*/
public String digestHexStr;
/*
* digest,是最新一次計(jì)算結(jié)果的2進(jìn)制內(nèi)部表示，表示128bit的keyBean值.
*/
private byte[] digest = new byte[16];
/*
* getkeyBeanofStr是類(lèi)keyBean最主要的公共方法，入口參數(shù)是你想要進(jìn)行keyBean變換的字符串
* 返回的是變換完的結(jié)果，這個(gè)結(jié)果是從公共成員digestHexStr取得的．
*/
public String getkeyBeanofStr(String inbuf) {
keyBeanInit();
keyBeanUpdate(inbuf.getBytes(), inbuf.length());
keyBeanFinal();
digestHexStr = "";
for (int i = 0; i 16; i++) {
digestHexStr += byteHEX(digest[i]);
}
return digestHexStr;
}
// 這是keyBean這個(gè)類(lèi)的標(biāo)準(zhǔn)構(gòu)造函數(shù)，JavaBean要求有一個(gè)public的并且沒(méi)有參數(shù)的構(gòu)造函數(shù)
public keyBean() {
keyBeanInit();
return;
}
/* keyBeanInit是一個(gè)初始化函數(shù)，初始化核心變量，裝入標(biāo)準(zhǔn)的幻數(shù) */
private void keyBeanInit() {
count[0] = 0L;
count[1] = 0L;
// /* Load magic initialization constants.
state[0] = 0x67452301L;
state[1] = 0xefcdab89L;
state[2] = 0x98badcfeL;
state[3] = 0x10325476L;
return;
}
/*
* F, G, H ,I 是4個(gè)基本的keyBean函數(shù)，在原始的keyBean的C實(shí)現(xiàn)中，由于它們是
* 簡(jiǎn)單的位運(yùn)算，可能出于效率的考慮把它們實(shí)現(xiàn)成了宏，在java中，我們把它們 實(shí)現(xiàn)成了private方法，名字保持了原來(lái)C中的。
*/
private long F(long x, long y, long z) {
return (x y) | ((~x) z);
}
private long G(long x, long y, long z) {
return (x z) | (y (~z));
}
private long H(long x, long y, long z) {
return x ^ y ^ z;
}
private long I(long x, long y, long z) {
return y ^ (x | (~z));
}
/*
* FF,GG,HH和II將調(diào)用F,G,H,I進(jìn)行近一步變換 FF, GG, HH, and II transformations for
* rounds 1, 2, 3, and 4. Rotation is separate from addition to prevent
* recomputation.
*/
private long FF(long a, long b, long c, long d, long x, long s, long ac) {
a += F(b, c, d) + x + ac;
a = ((int) a s) | ((int) a (32 - s));
a += b;
return a;
}
private long GG(long a, long b, long c, long d, long x, long s, long ac) {
a += G(b, c, d) + x + ac;
a = ((int) a s) | ((int) a (32 - s));
a += b;
return a;
}
private long HH(long a, long b, long c, long d, long x, long s, long ac) {
a += H(b, c, d) + x + ac;
a = ((int) a s) | ((int) a (32 - s));
a += b;
return a;
}
private long II(long a, long b, long c, long d, long x, long s, long ac) {
a += I(b, c, d) + x + ac;
a = ((int) a s) | ((int) a (32 - s));
a += b;
return a;
}
/*
* keyBeanUpdate是keyBean的主計(jì)算過(guò)程，inbuf是要變換的字節(jié)串，inputlen是長(zhǎng)度，這個(gè)
* 函數(shù)由getkeyBeanofStr調(diào)用，調(diào)用之前需要調(diào)用keyBeaninit，因此把它設(shè)計(jì)成private的
*/
private void keyBeanUpdate(byte[] inbuf, int inputLen) {
int i, index, partLen;
byte[] block = new byte[64];
index = (int) (count[0] 3) 0x3F;
// /* Update number of bits */
if ((count[0] += (inputLen 3)) (inputLen 3))
count[1]++;
count[1] += (inputLen 29);
partLen = 64 - index;
// Transform as many times as possible.
if (inputLen = partLen) {
keyBeanMemcpy(buffer, inbuf, index, 0, partLen);
keyBeanTransform(buffer);
for (i = partLen; i + 63 inputLen; i += 64) {
keyBeanMemcpy(block, inbuf, 0, i, 64);
keyBeanTransform(block);
}
index = 0;
} else
i = 0;
// /* Buffer remaining input */
keyBeanMemcpy(buffer, inbuf, index, i, inputLen - i);
}
/*
* keyBeanFinal整理和填寫(xiě)輸出結(jié)果
*/
private void keyBeanFinal() {
byte[] bits = new byte[8];
int index, padLen;
// /* Save number of bits */
Encode(bits, count, 8);
// /* Pad out to 56 mod 64.
index = (int) (count[0] 3) 0x3f;
padLen = (index 56) ? (56 - index) : (120 - index);
keyBeanUpdate(PADDING, padLen);
// /* Append length (before padding) */
keyBeanUpdate(bits, 8);
// /* Store state in digest */
Encode(digest, state, 16);
}
/*
* keyBeanMemcpy是一個(gè)內(nèi)部使用的byte數(shù)組的塊拷貝函數(shù)，從input的inpos開(kāi)始把len長(zhǎng)度的
* 字節(jié)拷貝到output的outpos位置開(kāi)始
*/
private void keyBeanMemcpy(byte[] output, byte[] input, int outpos,
int inpos, int len) {
int i;
for (i = 0; i len; i++)
output[outpos + i] = input[inpos + i];
}
/*
* keyBeanTransform是keyBean核心變換程序，有keyBeanUpdate調(diào)用，block是分塊的原始字節(jié)
*/
private void keyBeanTransform(byte block[]) {
long a = state[0], b = state[1], c = state[2], d = state[3];
long[] x = new long[16];
Decode(x, block, 64);
/* Round 1 */
a = FF(a, b, c, d, x[0], S11, 0xd76aa478L); /* 1 */
d = FF(d, a, b, c, x[1], S12, 0xe8c7b756L); /* 2 */
c = FF(c, d, a, b, x[2], S13, 0x242070dbL); /* 3 */
b = FF(b, c, d, a, x[3], S14, 0xc1bdceeeL); /* 4 */
a = FF(a, b, c, d, x[4], S11, 0xf57c0fafL); /* 5 */
d = FF(d, a, b, c, x[5], S12, 0x4787c62aL); /* 6 */
c = FF(c, d, a, b, x[6], S13, 0xa8304613L); /* 7 */
b = FF(b, c, d, a, x[7], S14, 0xfd469501L); /* 8 */
a = FF(a, b, c, d, x[8], S11, 0x698098d8L); /* 9 */
d = FF(d, a, b, c, x[9], S12, 0x8b44f7afL); /* 10 */
c = FF(c, d, a, b, x[10], S13, 0xffff5bb1L); /* 11 */
b = FF(b, c, d, a, x[11], S14, 0x895cd7beL); /* 12 */
a = FF(a, b, c, d, x[12], S11, 0x6b901122L); /* 13 */
d = FF(d, a, b, c, x[13], S12, 0xfd987193L); /* 14 */
c = FF(c, d, a, b, x[14], S13, 0xa679438eL); /* 15 */
b = FF(b, c, d, a, x[15], S14, 0x49b40821L); /* 16 */
/* Round 2 */
a = GG(a, b, c, d, x[1], S21, 0xf61e2562L); /* 17 */
d = GG(d, a, b, c, x[6], S22, 0xc040b340L); /* 18 */
c = GG(c, d, a, b, x[11], S23, 0x265e5a51L); /* 19 */
b = GG(b, c, d, a, x[0], S24, 0xe9b6c7aaL); /* 20 */
a = GG(a, b, c, d, x[5], S21, 0xd62f105dL); /* 21 */
d = GG(d, a, b, c, x[10], S22, 0x2441453L); /* 22 */
c = GG(c, d, a, b, x[15], S23, 0xd8a1e681L); /* 23 */
b = GG(b, c, d, a, x[4], S24, 0xe7d3fbc8L); /* 24 */
a = GG(a, b, c, d, x[9], S21, 0x21e1cde6L); /* 25 */
d = GG(d, a, b, c, x[14], S22, 0xc33707d6L); /* 26 */
c = GG(c, d, a, b, x[3], S23, 0xf4d50d87L); /* 27 */
b = GG(b, c, d, a, x[8], S24, 0x455a14edL); /* 28 */
a = GG(a, b, c, d, x[13], S21, 0xa9e3e905L); /* 29 */
d = GG(d, a, b, c, x[2], S22, 0xfcefa3f8L); /* 30 */
c = GG(c, d, a, b, x[7], S23, 0x676f02d9L); /* 31 */
b = GG(b, c, d, a, x[12], S24, 0x8d2a4c8aL); /* 32 */
/* Round 3 */
a = HH(a, b, c, d, x[5], S31, 0xfffa3942L); /* 33 */
d = HH(d, a, b, c, x[8], S32, 0x8771f681L); /* 34 */
c = HH(c, d, a, b, x[11], S33, 0x6d9d6122L); /* 35 */
b = HH(b, c, d, a, x[14], S34, 0xfde5380cL); /* 36 */
a = HH(a, b, c, d, x[1], S31, 0xa4beea44L); /* 37 */
d = HH(d, a, b, c, x[4], S32, 0x4bdecfa9L); /* 38 */
c = HH(c, d, a, b, x[7], S33, 0xf6bb4b60L); /* 39 */
b = HH(b, c, d, a, x[10], S34, 0xbebfbc70L); /* 40 */
a = HH(a, b, c, d, x[13], S31, 0x289b7ec6L); /* 41 */
d = HH(d, a, b, c, x[0], S32, 0xeaa127faL); /* 42 */
c = HH(c, d, a, b, x[3], S33, 0xd4ef3085L); /* 43 */
b = HH(b, c, d, a, x[6], S34, 0x4881d05L); /* 44 */
a = HH(a, b, c, d, x[9], S31, 0xd9d4d039L); /* 45 */
d = HH(d, a, b, c, x[12], S32, 0xe6db99e5L); /* 46 */
c = HH(c, d, a, b, x[15], S33, 0x1fa27cf8L); /* 47 */
b = HH(b, c, d, a, x[2], S34, 0xc4ac5665L); /* 48 */
/* Round 4 */
a = II(a, b, c, d, x[0], S41, 0xf4292244L); /* 49 */
d = II(d, a, b, c, x[7], S42, 0x432aff97L); /* 50 */
c = II(c, d, a, b, x[14], S43, 0xab9423a7L); /* 51 */
b = II(b, c, d, a, x[5], S44, 0xfc93a039L); /* 52 */
a = II(a, b, c, d, x[12], S41, 0x655b59c3L); /* 53 */
d = II(d, a, b, c, x[3], S42, 0x8f0ccc92L); /* 54 */
c = II(c, d, a, b, x[10], S43, 0xffeff47dL); /* 55 */
b = II(b, c, d, a, x[1], S44, 0x85845dd1L); /* 56 */
a = II(a, b, c, d, x[8], S41, 0x6fa87e4fL); /* 57 */
d = II(d, a, b, c, x[15], S42, 0xfe2ce6e0L); /* 58 */
c = II(c, d, a, b, x[6], S43, 0xa3014314L); /* 59 */
b = II(b, c, d, a, x[13], S44, 0x4e0811a1L); /* 60 */
a = II(a, b, c, d, x[4], S41, 0xf7537e82L); /* 61 */
d = II(d, a, b, c, x[11], S42, 0xbd3af235L); /* 62 */
c = II(c, d, a, b, x[2], S43, 0x2ad7d2bbL); /* 63 */
b = II(b, c, d, a, x[9], S44, 0xeb86d391L); /* 64 */
state[0] += a;
state[1] += b;
state[2] += c;
state[3] += d;
}
/*
* Encode把long數(shù)組按順序拆成byte數(shù)組，因?yàn)閖ava的long類(lèi)型是64bit的， 只拆低32bit，以適應(yīng)原始C實(shí)現(xiàn)的用途
*/
private void Encode(byte[] output, long[] input, int len) {
int i, j;
for (i = 0, j = 0; j len; i++, j += 4) {
output[j] = (byte) (input[i] 0xffL);
output[j + 1] = (byte) ((input[i] 8) 0xffL);
output[j + 2] = (byte) ((input[i] 16) 0xffL);
output[j + 3] = (byte) ((input[i] 24) 0xffL);
}
}
/*
* Decode把byte數(shù)組按順序合成成long數(shù)組，因?yàn)閖ava的long類(lèi)型是64bit的，
* 只合成低32bit，高32bit清零，以適應(yīng)原始C實(shí)現(xiàn)的用途
*/
private void Decode(long[] output, byte[] input, int len) {
int i, j;
for (i = 0, j = 0; j len; i++, j += 4)
output[i] = b2iu(input[j]) | (b2iu(input[j + 1]) 8)
| (b2iu(input[j + 2]) 16) | (b2iu(input[j + 3]) 24);
return;
}
/*
* b2iu是我寫(xiě)的一個(gè)把byte按照不考慮正負(fù)號(hào)的原則的”升位”程序，因?yàn)閖ava沒(méi)有unsigned運(yùn)算
*/
public static long b2iu(byte b) {
return b 0 ? b 0x7F + 128 : b;
}
/*
* byteHEX()，用來(lái)把一個(gè)byte類(lèi)型的數(shù)轉(zhuǎn)換成十六進(jìn)制的ASCII表示，
* 因?yàn)閖ava中的byte的toString無(wú)法實(shí)現(xiàn)這一點(diǎn)，我們又沒(méi)有C語(yǔ)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;
}
public static void main(String args[]) {
keyBean m = new keyBean();
if (Array.getLength(args) == 0) { // 如果沒(méi)有參數(shù)，執(zhí)行標(biāo)準(zhǔn)的Test Suite
System.out.println("keyBean Test suite:");
System.out.println("keyBean(\"):" + m.getkeyBeanofStr(""));
System.out.println("keyBean(\"a\"):" + m.getkeyBeanofStr("a"));
System.out.println("keyBean(\"abc\"):" + m.getkeyBeanofStr("abc"));
System.out.println("keyBean(\"message digest\"):"
+ m.getkeyBeanofStr("message digest"));
System.out.println("keyBean(\"abcdefghijklmnopqrstuvwxyz\"):"
+ m.getkeyBeanofStr("abcdefghijklmnopqrstuvwxyz"));
System.out
.println("keyBean(\"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789\"):"
+ m
.getkeyBeanofStr("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"));
} else
System.out.println("keyBean(" + args[0] + ")="
+ m.getkeyBeanofStr(args[0]));
}
}
java加密字符串可以使用des加密算法，實(shí)例如下：
package test;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.security.*;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
/**
* 加密解密
*
* @author shy.qiu
* @since
*/
public class CryptTest {
/**
* 進(jìn)行MD5加密
*
* @param info
* 要加密的信息
* @return String 加密后的字符串
*/
public String encryptToMD5(String info) {
byte[] digesta = null;
try {
// 得到一個(gè)md5的消息摘要
MessageDigest alga = MessageDigest.getInstance("MD5");
// 添加要進(jìn)行計(jì)算摘要的信息
alga.update(info.getBytes());
// 得到該摘要
digesta = alga.digest();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
// 將摘要轉(zhuǎn)為字符串
String rs = byte2hex(digesta);
return rs;
}
/**
* 進(jìn)行SHA加密
*
* @param info
* 要加密的信息
* @return String 加密后的字符串
*/
public String encryptToSHA(String info) {
byte[] digesta = null;
try {
// 得到一個(gè)SHA-1的消息摘要
MessageDigest alga = MessageDigest.getInstance("SHA-1");
// 添加要進(jìn)行計(jì)算摘要的信息
alga.update(info.getBytes());
// 得到該摘要
digesta = alga.digest();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
// 將摘要轉(zhuǎn)為字符串
String rs = byte2hex(digesta);
return rs;
}
// //////////////////////////////////////////////////////////////////////////
/**
* 創(chuàng)建密匙
*
* @param algorithm
* 加密算法,可用 DES,DESede,Blowfish
* @return SecretKey 秘密（對(duì)稱）密鑰
*/
public SecretKey createSecretKey(String algorithm) {
// 聲明KeyGenerator對(duì)象
KeyGenerator keygen;
// 聲明 密鑰對(duì)象
SecretKey deskey = null;
try {
// 返回生成指定算法的秘密密鑰的 KeyGenerator 對(duì)象
keygen = KeyGenerator.getInstance(algorithm);
// 生成一個(gè)密鑰
deskey = keygen.generateKey();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
// 返回密匙
return deskey;
}
/**
* 根據(jù)密匙進(jìn)行DES加密
*
* @param key
* 密匙
* @param info
* 要加密的信息
* @return String 加密后的信息
*/
public String encryptToDES(SecretKey key, String info) {
// 定義 加密算法,可用 DES,DESede,Blowfish
String Algorithm = "DES";
// 加密隨機(jī)數(shù)生成器 (RNG),(可以不寫(xiě))
SecureRandom sr = new SecureRandom();
// 定義要生成的密文
byte[] cipherByte = null;
try {
// 得到加密/解密器
Cipher c1 = Cipher.getInstance(Algorithm);
// 用指定的密鑰和模式初始化Cipher對(duì)象
// 參數(shù):(ENCRYPT_MODE, DECRYPT_MODE, WRAP_MODE,UNWRAP_MODE)
c1.init(Cipher.ENCRYPT_MODE, key, sr);
// 對(duì)要加密的內(nèi)容進(jìn)行編碼處理,
cipherByte = c1.doFinal(info.getBytes());
} catch (Exception e) {
e.printStackTrace();
}
// 返回密文的十六進(jìn)制形式
return byte2hex(cipherByte);
}
/**
* 根據(jù)密匙進(jìn)行DES解密
*
* @param key
* 密匙
* @param sInfo
* 要解密的密文
* @return String 返回解密后信息
*/
public String decryptByDES(SecretKey key, String sInfo) {
// 定義 加密算法,
String Algorithm = "DES";
// 加密隨機(jī)數(shù)生成器 (RNG)
SecureRandom sr = new SecureRandom();
byte[] cipherByte = null;
try {
// 得到加密/解密器
Cipher c1 = Cipher.getInstance(Algorithm);
// 用指定的密鑰和模式初始化Cipher對(duì)象
c1.init(Cipher.DECRYPT_MODE, key, sr);
// 對(duì)要解密的內(nèi)容進(jìn)行編碼處理
cipherByte = c1.doFinal(hex2byte(sInfo));
} catch (Exception e) {
e.printStackTrace();
}
// return byte2hex(cipherByte);
return new String(cipherByte);
}
// /////////////////////////////////////////////////////////////////////////////
/**
* 創(chuàng)建密匙組，并將公匙，私匙放入到指定文件中
*
* 默認(rèn)放入mykeys.bat文件中
*/
public void createPairKey() {
try {
// 根據(jù)特定的算法一個(gè)密鑰對(duì)生成器
KeyPairGenerator keygen = KeyPairGenerator.getInstance("DSA");
// 加密隨機(jī)數(shù)生成器 (RNG)
SecureRandom random = new SecureRandom();
// 重新設(shè)置此隨機(jī)對(duì)象的種子
random.setSeed(1000);
// 使用給定的隨機(jī)源（和默認(rèn)的參數(shù)集合）初始化確定密鑰大小的密鑰對(duì)生成器
keygen.initialize(512, random);// keygen.initialize(512);
// 生成密鑰組
KeyPair keys = keygen.generateKeyPair();
// 得到公匙
PublicKey pubkey = keys.getPublic();
// 得到私匙
PrivateKey prikey = keys.getPrivate();
// 將公匙私匙寫(xiě)入到文件當(dāng)中
doObjToFile("mykeys.bat", new Object[] { prikey, pubkey });
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
}
/**
* 利用私匙對(duì)信息進(jìn)行簽名 把簽名后的信息放入到指定的文件中
*
* @param info
* 要簽名的信息
* @param signfile
* 存入的文件
*/
public void signToInfo(String info, String signfile) {
// 從文件當(dāng)中讀取私匙
PrivateKey myprikey = (PrivateKey) getObjFromFile("mykeys.bat", 1);
// 從文件中讀取公匙
PublicKey mypubkey = (PublicKey) getObjFromFile("mykeys.bat", 2);
try {
// Signature 對(duì)象可用來(lái)生成和驗(yàn)證數(shù)字簽名
Signature signet = Signature.getInstance("DSA");
// 初始化簽署簽名的私鑰
signet.initSign(myprikey);
// 更新要由字節(jié)簽名或驗(yàn)證的數(shù)據(jù)
signet.update(info.getBytes());
// 簽署或驗(yàn)證所有更新字節(jié)的簽名，返回簽名
byte[] signed = signet.sign();
// 將數(shù)字簽名,公匙,信息放入文件中
doObjToFile(signfile, new Object[] { signed, mypubkey, info });
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 讀取數(shù)字簽名文件 根據(jù)公匙，簽名，信息驗(yàn)證信息的合法性
*
* @return true 驗(yàn)證成功 false 驗(yàn)證失敗
*/
public boolean validateSign(String signfile) {
// 讀取公匙
PublicKey mypubkey = (PublicKey) getObjFromFile(signfile, 2);
// 讀取簽名
byte[] signed = (byte[]) getObjFromFile(signfile, 1);
// 讀取信息
String info = (String) getObjFromFile(signfile, 3);
try {
// 初始一個(gè)Signature對(duì)象,并用公鑰和簽名進(jìn)行驗(yàn)證
Signature signetcheck = Signature.getInstance("DSA");
// 初始化驗(yàn)證簽名的公鑰
signetcheck.initVerify(mypubkey);
// 使用指定的 byte 數(shù)組更新要簽名或驗(yàn)證的數(shù)據(jù)
signetcheck.update(info.getBytes());
System.out.println(info);
// 驗(yàn)證傳入的簽名
return signetcheck.verify(signed);
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* 將二進(jìn)制轉(zhuǎn)化為16進(jìn)制字符串
*
* @param b
* 二進(jìn)制字節(jié)數(shù)組
* @return String
*/
public String byte2hex(byte[] b) {
String hs = "";
String stmp = "";
for (int n = 0; n b.length; n++) {
stmp = (java.lang.Integer.toHexString(b[n] 0XFF));
if (stmp.length() == 1) {
hs = hs + "0" + stmp;
} else {
hs = hs + stmp;
}
}
return hs.toUpperCase();
}
/**
* 十六進(jìn)制字符串轉(zhuǎn)化為2進(jìn)制
*
* @param hex
* @return
*/
public byte[] hex2byte(String hex) {
byte[] ret = new byte[8];
byte[] tmp = hex.getBytes();
for (int i = 0; i 8; i++) {
ret[i] = uniteBytes(tmp[i * 2], tmp[i * 2 + 1]);
}
return ret;
}
/**
* 將兩個(gè)ASCII字符合成一個(gè)字節(jié)； 如："EF"-- 0xEF
*
* @param src0
* byte
* @param src1
* byte
* @return byte
*/
public static byte uniteBytes(byte src0, byte src1) {
byte _b0 = Byte.decode("0x" + new String(new byte[] { src0 }))
.byteValue();
_b0 = (byte) (_b0 4);
byte _b1 = Byte.decode("0x" + new String(new byte[] { src1 }))
.byteValue();
byte ret = (byte) (_b0 ^ _b1);
return ret;
}
/**
* 將指定的對(duì)象寫(xiě)入指定的文件
*
* @param file
* 指定寫(xiě)入的文件
* @param objs
* 要寫(xiě)入的對(duì)象
*/
public void doObjToFile(String file, Object[] objs) {
ObjectOutputStream oos = null;
try {
FileOutputStream fos = new FileOutputStream(file);
oos = new ObjectOutputStream(fos);
for (int i = 0; i objs.length; i++) {
oos.writeObject(objs[i]);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
oos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 返回在文件中指定位置的對(duì)象
*
* @param file
* 指定的文件
* @param i
* 從1開(kāi)始
* @return
*/
public Object getObjFromFile(String file, int i) {
ObjectInputStream ois = null;
Object obj = null;
try {
FileInputStream fis = new FileInputStream(file);
ois = new ObjectInputStream(fis);
for (int j = 0; j i; j++) {
obj = ois.readObject();
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
ois.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return obj;
}
/**
* 測(cè)試
*
* @param args
*/
public static void main(String[] args) {
CryptTest jiami = new CryptTest();
// 執(zhí)行MD5加密"Hello world!"
System.out.println("Hello經(jīng)過(guò)MD5:" + jiami.encryptToMD5("Hello"));
// 生成一個(gè)DES算法的密匙
SecretKey key = jiami.createSecretKey("DES");
// 用密匙加密信息"Hello world!"
String str1 = jiami.encryptToDES(key, "Hello");
System.out.println("使用des加密信息Hello為:" + str1);
// 使用這個(gè)密匙解密
String str2 = jiami.decryptByDES(key, str1);
System.out.println("解密后為：" + str2);
// 創(chuàng)建公匙和私匙
jiami.createPairKey();
// 對(duì)Hello world!使用私匙進(jìn)行簽名
jiami.signToInfo("Hello", "mysign.bat");
// 利用公匙對(duì)簽名進(jìn)行驗(yàn)證。
if (jiami.validateSign("mysign.bat")) {
System.out.println("Success!");
} else {
System.out.println("Fail!");
}
}
}
package com.cube.limail.util;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;/**
* 加密解密類(lèi)
*/
public class Eryptogram
{
private static String Algorithm ="DES";
private String key="CB7A92E3D3491964";
//定義 加密算法,可用 DES,DESede,Blowfish
static boolean debug = false ;
/**
* 構(gòu)造子注解.
*/
public Eryptogram ()
{
} /**
* 生成密鑰
* @return byte[] 返回生成的密鑰
* @throws exception 扔出異常.
*/
public static byte [] getSecretKey () throws Exception
{
KeyGenerator keygen = KeyGenerator.getInstance (Algorithm );
SecretKey deskey = keygen.generateKey ();
System.out.println ("生成密鑰:"+bytesToHexString (deskey.getEncoded ()));
if (debug ) System.out.println ("生成密鑰:"+bytesToHexString (deskey.getEncoded ()));
return deskey.getEncoded ();
} /**
* 將指定的數(shù)據(jù)根據(jù)提供的密鑰進(jìn)行加密
* @param input 需要加密的數(shù)據(jù)
* @param key 密鑰
* @return byte[] 加密后的數(shù)據(jù)
* @throws Exception
*/
public static byte [] encryptData (byte [] input ,byte [] key ) throws Exception
{
SecretKey deskey = new javax.crypto.spec.SecretKeySpec (key ,Algorithm );
if (debug )
{
System.out.println ("加密前的二進(jìn)串:"+byte2hex (input ));
System.out.println ("加密前的字符串:"+new String (input ));
} Cipher c1 = Cipher.getInstance (Algorithm );
c1.init (Cipher.ENCRYPT_MODE ,deskey );
byte [] cipherByte =c1.doFinal (input );
if (debug ) System.out.println ("加密后的二進(jìn)串:"+byte2hex (cipherByte ));
return cipherByte ;
} /**
* 將給定的已加密的數(shù)據(jù)通過(guò)指定的密鑰進(jìn)行解密
* @param input 待解密的數(shù)據(jù)
* @param key 密鑰
* @return byte[] 解密后的數(shù)據(jù)
* @throws Exception
*/
public static byte [] decryptData (byte [] input ,byte [] key ) throws Exception
{
SecretKey deskey = new javax.crypto.spec.SecretKeySpec (key ,Algorithm );
if (debug ) System.out.println ("解密前的信息:"+byte2hex (input ));
Cipher c1 = Cipher.getInstance (Algorithm );
c1.init (Cipher.DECRYPT_MODE ,deskey );
byte [] clearByte =c1.doFinal (input );
if (debug )
{
System.out.println ("解密后的二進(jìn)串:"+byte2hex (clearByte ));
System.out.println ("解密后的字符串:"+(new String (clearByte )));
} return clearByte ;
} /**
* 字節(jié)碼轉(zhuǎn)換成16進(jìn)制字符串
* @param byte[] b 輸入要轉(zhuǎn)換的字節(jié)碼
* @return String 返回轉(zhuǎn)換后的16進(jìn)制字符串
*/
public static String byte2hex (byte [] b )
{
String hs ="";
String stmp ="";
for (int n =0 ;n b.length ;n ++)
{
stmp =(java.lang.Integer.toHexString (b [n ] 0XFF ));
if (stmp.length ()==1 ) hs =hs +"0"+stmp ;
else hs =hs +stmp ;
if (n b.length -1 ) hs =hs +":";
} return hs.toUpperCase ();
}
/**
* 字符串轉(zhuǎn)成字節(jié)數(shù)組.
* @param hex 要轉(zhuǎn)化的字符串.
* @return byte[] 返回轉(zhuǎn)化后的字符串.
*/
public static byte[] hexStringToByte(String hex) {
int len = (hex.length() / 2);
byte[] result = new byte[len];
char[] achar = hex.toCharArray();
for (int i = 0; i len; i++) {
int pos = i * 2;
result[i] = (byte) (toByte(achar[pos]) 4 | toByte(achar[pos + 1]));
}
return result;
}
private static byte toByte(char c) {
byte b = (byte) "0123456789ABCDEF".indexOf(c);
return b;
}
/**
* 字節(jié)數(shù)組轉(zhuǎn)成字符串.
* @param String 要轉(zhuǎn)化的字符串.
* @return 返回轉(zhuǎn)化后的字節(jié)數(shù)組.
*/
public static final String bytesToHexString(byte[] bArray) {
StringBuffer sb = new StringBuffer(bArray.length);
String sTemp;
for (int i = 0; i bArray.length; i++) {
sTemp = Integer.toHexString(0xFF bArray[i]);
if (sTemp.length() 2)
sb.append(0);
sb.append(sTemp.toUpperCase());
}
return sb.toString();
}
/**
* 從數(shù)據(jù)庫(kù)中獲取密鑰.
* @param deptid 企業(yè)id.
* @return 要返回的字節(jié)數(shù)組.
* @throws Exception 可能拋出的異常.
*/
public static byte[] getSecretKey(long deptid) throws Exception {
byte[] key=null;
String value=null;
//CommDao dao=new CommDao();
// List list=dao.getRecordList("from Key k where k.deptid="+deptid);
//if(list.size()0){
//value=((com.csc.sale.bean.Key)list.get(0)).getKey();
value = "CB7A92E3D3491964";
key=hexStringToByte(value);
//}
if (debug)
System.out.println("密鑰:" + value);
return key;
}
public String encryptData2(String data) {
String en = null;
try {
byte[] key=hexStringToByte(this.key);
en = bytesToHexString(encryptData(data.getBytes(),key));
} catch (Exception e) {
e.printStackTrace();
}
return en;
}
public String decryptData2(String data) {
String de = null;
try {
byte[] key=hexStringToByte(this.key);
de = new String(decryptData(hexStringToByte(data),key));
} catch (Exception e) {
e.printStackTrace();
}
return de;
}
} 加密使用： byte[] key=Eryptogram.getSecretKey(deptid); //獲得鑰匙（字節(jié)數(shù)組）
byte[] tmp=Eryptogram.encryptData(password.getBytes(), key); //傳入密碼和鑰匙，獲得加密后的字節(jié)數(shù)組的密碼
password=Eryptogram.bytesToHexString(tmp); //將字節(jié)數(shù)組轉(zhuǎn)化為字符串，獲得加密后的字符串密碼解密與之差不多
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