13518219792
小编给大家分享一下Java语言如何实现Blowfish加密算法，相信大部分人都还不怎么了解，因此分享这篇文章给大家参考一下，希望大家阅读完这篇文章后大有收获，下面让我们一起去了解一下吧！
成都创新互联公司制作网站网页找三站合一网站制作公司,专注于网页设计,网站设计制作、成都网站制作,网站设计,企业网站搭建,网站开发,建网站业务,680元做网站,已为近千家服务,成都创新互联公司网站建设将一如既往的为我们的客户提供最优质的网站建设、网络营销推广服务!
前几天网上突然出现流言：某东发生数据泄露12G，最终某东在一篇声明中没有否认，还算是勉强承认了吧，这件事对于一般人有什么影响、应该怎么做已经有一堆人说了，所以就不凑热闹了，咱来点对程序猿来说实际点的，说一个个人认为目前比较安全的加密算法：Blowfish。
上代码之前，先说几点Blowfish加密算法的特点：
1. 对称加密，即加密的密钥和解密的密钥是相同的；
2. 每次加密之后的结果是不同的（这也是老夫比较欣赏的一点）；
3. 可逆的，和老夫之前的文章介绍的md5等摘要算法不一样，他是可逆的；
4. 速度快，加密和解密的过程基本上由ADD和XOR指令运算组成；
5. 免费，任何人都可以免费使用不需要缴纳版权费；
6. BlowFish 每次只能加密和解密8字节数据；
Blowfish算法是一种对称的分组加密算法，算法核心在于子密钥生成，它将变长密钥扩展成总长4168Byte的子密钥数组。算法中使用了大量的子密钥，而子密钥又依赖于用户密钥，实际加/解密过程中使用的是更新后的子密钥数组，子密钥即P数组和S盒。Blowfish算法有一个核心加密函数:BF_En()，该函数的输人是64位明文信息，经过运算，以64位密文信息的形式输出。用Blowfish算法加密信息，需要两个过程:密钥预处理和信息加密。同样，解密亦需要两个过程，密钥预处理和信息解密。
Blowfish算法的源密钥——pbox和sbox是固定的，而我们要加密一个信息，需要自己选择一个key，用这个key对pbox和sbox进行变换，得到下一步信息加密所要用的key_pbox和key_sbox。解密亦是如此，由于Blowfish是对称加密算法，解密方在得到key后根据key生成解密所需的key_box和key_sbox。对同一个信息加密解密，选取的key的不同会导致密文的不同。因此，Blowfish算法的关键在于key的选择以及保密。
由于Blowfish算法采用变长密钥，这在给用户带来极大便利的同时也有隐患。由于算法加/解密核心在于密钥的选择和保密，但在实际应用中经常使用一些弱密钥对信息资源进行加密，导致存在着很大的安全隐患
接下来就是最重要的部分，Blowfish加密算法的实现：
package cn.bridgeli.encrypt;
public enum BlowfishManager {
BRIDGELI_CN("bridgeli_cn!@#$abc123_");
private BlowfishManager(String secret) {
this.blowfish = new Blowfish(secret);
}
private Blowfish blowfish;
public Blowfish getBlowfish() {
return blowfish;
}
/**
* 解密
* @param sCipherText
* @return
*/
public String decryptString(String sCipherText){
return this.getBlowfish().decryptString(sCipherText);
}
/**
* 加密
* @param sPlainText
* @return
*/
public String encryptString(String sPlainText){
return this.getBlowfish().encryptString(sPlainText);
}
public static void main(String[] args) {
String encryptString = BlowfishManager.BRIDGELI_CN.encryptString(10 + "");
System.out.println(encryptString);
String decryptString = BlowfishManager.BRIDGELI_CN.decryptString(encryptString);
System.out.println(decryptString);
}
}这是对外的接口，使用起来非常简单，对用户很友好，下面是算法的具体实现：
package cn.bridgeli.encrypt;
import java.security.MessageDigest;
import java.util.Random;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class Blowfish {
private static final Logger LOG = LoggerFactory.getLogger(Blowfish.class);
private static class BlowfishCBC extends BlowfishECB {
public void setCBCIV(long lNewCBCIV) {
m_lCBCIV = lNewCBCIV;
}
public void setCBCIV(byte newCBCIV[]) {
m_lCBCIV = Blowfish.byteArrayToLong(newCBCIV, 0);
}
@Override
public void cleanUp() {
m_lCBCIV = 0L;
super.cleanUp();
}
private long encryptBlockCBC(long lPlainblock) {
lPlainblock ^= m_lCBCIV;
lPlainblock = super.encryptBlock(lPlainblock);
return m_lCBCIV = lPlainblock;
}
private long decryptBlockCBC(long lCipherblock) {
long lTemp = lCipherblock;
lCipherblock = super.decryptBlock(lCipherblock);
lCipherblock ^= m_lCBCIV;
m_lCBCIV = lTemp;
return lCipherblock;
}
public void encrypt(byte buffer[]) {
int nLen = buffer.length;
for (int nI = 0; nI < nLen; nI += 8) {
long lTemp = Blowfish.byteArrayToLong(buffer, nI);
lTemp = encryptBlockCBC(lTemp);
Blowfish.longToByteArray(lTemp, buffer, nI);
}
}
public void decrypt(byte buffer[]) {
int nLen = buffer.length;
for (int nI = 0; nI < nLen; nI += 8) {
long lTemp = Blowfish.byteArrayToLong(buffer, nI);
lTemp = decryptBlockCBC(lTemp);
Blowfish.longToByteArray(lTemp, buffer, nI);
}
}
long m_lCBCIV;
public BlowfishCBC(byte bfkey[]) {
super(bfkey);
setCBCIV(0L);
}
public BlowfishCBC(byte bfkey[], long lInitCBCIV) {
super(bfkey);
setCBCIV(lInitCBCIV);
}
public BlowfishCBC(byte bfkey[], byte initCBCIV[]) {
super(bfkey);
setCBCIV(initCBCIV);
}
}
private static class BlowfishECB {
public void cleanUp() {
for (int nI = 0; nI < 18; nI++) {
m_pbox[nI] = 0;
}
for (int nI = 0; nI < 256; nI++) {
m_sbox1[nI] = m_sbox2[nI] = m_sbox3[nI] = m_sbox4[nI] = 0;
}
}
protected long encryptBlock(long lPlainBlock) {
int nHi = Blowfish.longHi32(lPlainBlock);
int nLo = Blowfish.longLo32(lPlainBlock);
int sbox1[] = m_sbox1;
int sbox2[] = m_sbox2;
int sbox3[] = m_sbox3;
int sbox4[] = m_sbox4;
int pbox[] = m_pbox;
nHi ^= pbox[0];
nLo ^= (sbox1[nHi >>> 24] + sbox2[nHi >>> 16 & 0xff] ^ sbox3[nHi >>> 8 & 0xff])
+ sbox4[nHi & 0xff] ^ pbox[1];
nHi ^= (sbox1[nLo >>> 24] + sbox2[nLo >>> 16 & 0xff] ^ sbox3[nLo >>> 8 & 0xff])
+ sbox4[nLo & 0xff] ^ pbox[2];
nLo ^= (sbox1[nHi >>> 24] + sbox2[nHi >>> 16 & 0xff] ^ sbox3[nHi >>> 8 & 0xff])
+ sbox4[nHi & 0xff] ^ pbox[3];
nHi ^= (sbox1[nLo >>> 24] + sbox2[nLo >>> 16 & 0xff] ^ sbox3[nLo >>> 8 & 0xff])
+ sbox4[nLo & 0xff] ^ pbox[4];
nLo ^= (sbox1[nHi >>> 24] + sbox2[nHi >>> 16 & 0xff] ^ sbox3[nHi >>> 8 & 0xff])
+ sbox4[nHi & 0xff] ^ pbox[5];
nHi ^= (sbox1[nLo >>> 24] + sbox2[nLo >>> 16 & 0xff] ^ sbox3[nLo >>> 8 & 0xff])
+ sbox4[nLo & 0xff] ^ pbox[6];
nLo ^= (sbox1[nHi >>> 24] + sbox2[nHi >>> 16 & 0xff] ^ sbox3[nHi >>> 8 & 0xff])
+ sbox4[nHi & 0xff] ^ pbox[7];
nHi ^= (sbox1[nLo >>> 24] + sbox2[nLo >>> 16 & 0xff] ^ sbox3[nLo >>> 8 & 0xff])
+ sbox4[nLo & 0xff] ^ pbox[8];
nLo ^= (sbox1[nHi >>> 24] + sbox2[nHi >>> 16 & 0xff] ^ sbox3[nHi >>> 8 & 0xff])
+ sbox4[nHi & 0xff] ^ pbox[9];
nHi ^= (sbox1[nLo >>> 24] + sbox2[nLo >>> 16 & 0xff] ^ sbox3[nLo >>> 8 & 0xff])
+ sbox4[nLo & 0xff] ^ pbox[10];
nLo ^= (sbox1[nHi >>> 24] + sbox2[nHi >>> 16 & 0xff] ^ sbox3[nHi >>> 8 & 0xff])
+ sbox4[nHi & 0xff] ^ pbox[11];
nHi ^= (sbox1[nLo >>> 24] + sbox2[nLo >>> 16 & 0xff] ^ sbox3[nLo >>> 8 & 0xff])
+ sbox4[nLo & 0xff] ^ pbox[12];
nLo ^= (sbox1[nHi >>> 24] + sbox2[nHi >>> 16 & 0xff] ^ sbox3[nHi >>> 8 & 0xff])
+ sbox4[nHi & 0xff] ^ pbox[13];
nHi ^= (sbox1[nLo >>> 24] + sbox2[nLo >>> 16 & 0xff] ^ sbox3[nLo >>> 8 & 0xff])
+ sbox4[nLo & 0xff] ^ pbox[14];
nLo ^= (sbox1[nHi >>> 24] + sbox2[nHi >>> 16 & 0xff] ^ sbox3[nHi >>> 8 & 0xff])
+ sbox4[nHi & 0xff] ^ pbox[15];
nHi ^= (sbox1[nLo >>> 24] + sbox2[nLo >>> 16 & 0xff] ^ sbox3[nLo >>> 8 & 0xff])
+ sbox4[nLo & 0xff] ^ pbox[16];
return Blowfish.makeLong(nHi, nLo ^ pbox[17]);
}
protected long decryptBlock(long lCipherBlock) {
int nHi = Blowfish.longHi32(lCipherBlock);
int nLo = Blowfish.longLo32(lCipherBlock);
nHi ^= m_pbox[17];
nLo ^= (m_sbox1[nHi >>> 24] + m_sbox2[nHi >>> 16 & 0xff] ^ m_sbox3[nHi >>> 8 & 0xff])
+ m_sbox4[nHi & 0xff] ^ m_pbox[16];
nHi ^= (m_sbox1[nLo >>> 24] + m_sbox2[nLo >>> 16 & 0xff] ^ m_sbox3[nLo >>> 8 & 0xff])
+ m_sbox4[nLo & 0xff] ^ m_pbox[15];
nLo ^= (m_sbox1[nHi >>> 24] + m_sbox2[nHi >>> 16 & 0xff] ^ m_sbox3[nHi >>> 8 & 0xff])
+ m_sbox4[nHi & 0xff] ^ m_pbox[14];
nHi ^= (m_sbox1[nLo >>> 24] + m_sbox2[nLo >>> 16 & 0xff] ^ m_sbox3[nLo >>> 8 & 0xff])
+ m_sbox4[nLo & 0xff] ^ m_pbox[13];
nLo ^= (m_sbox1[nHi >>> 24] + m_sbox2[nHi >>> 16 & 0xff] ^ m_sbox3[nHi >>> 8 & 0xff])
+ m_sbox4[nHi & 0xff] ^ m_pbox[12];
nHi ^= (m_sbox1[nLo >>> 24] + m_sbox2[nLo >>> 16 & 0xff] ^ m_sbox3[nLo >>> 8 & 0xff])
+ m_sbox4[nLo & 0xff] ^ m_pbox[11];
nLo ^= (m_sbox1[nHi >>> 24] + m_sbox2[nHi >>> 16 & 0xff] ^ m_sbox3[nHi >>> 8 & 0xff])
+ m_sbox4[nHi & 0xff] ^ m_pbox[10];
nHi ^= (m_sbox1[nLo >>> 24] + m_sbox2[nLo >>> 16 & 0xff] ^ m_sbox3[nLo >>> 8 & 0xff])
+ m_sbox4[nLo & 0xff] ^ m_pbox[9];
nLo ^= (m_sbox1[nHi >>> 24] + m_sbox2[nHi >>> 16 & 0xff] ^ m_sbox3[nHi >>> 8 & 0xff])
+ m_sbox4[nHi & 0xff] ^ m_pbox[8];
nHi ^= (m_sbox1[nLo >>> 24] + m_sbox2[nLo >>> 16 & 0xff] ^ m_sbox3[nLo >>> 8 & 0xff])
+ m_sbox4[nLo & 0xff] ^ m_pbox[7];
nLo ^= (m_sbox1[nHi >>> 24] + m_sbox2[nHi >>> 16 & 0xff] ^ m_sbox3[nHi >>> 8 & 0xff])
+ m_sbox4[nHi & 0xff] ^ m_pbox[6];
nHi ^= (m_sbox1[nLo >>> 24] + m_sbox2[nLo >>> 16 & 0xff] ^ m_sbox3[nLo >>> 8 & 0xff])
+ m_sbox4[nLo & 0xff] ^ m_pbox[5];
nLo ^= (m_sbox1[nHi >>> 24] + m_sbox2[nHi >>> 16 & 0xff] ^ m_sbox3[nHi >>> 8 & 0xff])
+ m_sbox4[nHi & 0xff] ^ m_pbox[4];
nHi ^= (m_sbox1[nLo >>> 24] + m_sbox2[nLo >>> 16 & 0xff] ^ m_sbox3[nLo >>> 8 & 0xff])
+ m_sbox4[nLo & 0xff] ^ m_pbox[3];
nLo ^= (m_sbox1[nHi >>> 24] + m_sbox2[nHi >>> 16 & 0xff] ^ m_sbox3[nHi >>> 8 & 0xff])
+ m_sbox4[nHi & 0xff] ^ m_pbox[2];
nHi ^= (m_sbox1[nLo >>> 24] + m_sbox2[nLo >>> 16 & 0xff] ^ m_sbox3[nLo >>> 8 & 0xff])
+ m_sbox4[nLo & 0xff] ^ m_pbox[1];
return Blowfish.makeLong(nHi, nLo ^ m_pbox[0]);
}
int m_pbox[];
int m_sbox1[];
int m_sbox2[];
int m_sbox3[];
int m_sbox4[];
static final int pbox_init[] = { 0x243f6a88, 0x85a308d3, 0x13198a2e, 0x3707344, 0xa4093822,
0x299f31d0, 0x82efa98, 0xec4e6c89, 0x452821e6, 0x38d01377,
0xbe5466cf, 0x34e90c6c, 0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5,
0xb5470917, 0x9216d5d9, 0x8979fb1b };
static final int sbox_init_1[] = { 0xd1310ba6, 0x98dfb5ac, 0x2ffd72db, 0xd01adfb7,
0xb8e1afed, 0x6a267e96, 0xba7c9045, 0xf12c7f99,
0x24a19947, 0xb3916cf7, 0x801f2e2, 0x858efc16,
0x636920d8, 0x71574e69, 0xa458fea3, 0xf4933d7e,
0xd95748f, 0x728eb658, 0x718bcd58, 0x82154aee,
0x7b54a41d, 0xc25a59b5, 0x9c30d539, 0x2af26013,
0xc5d1b023, 0x286085f0, 0xca417918, 0xb8db38ef,
0x8e79dcb0, 0x603a180e, 0x6c9e0e8b, 0xb01e8a3e,
0xd71577c1, 0xbd314b27, 0x78af2fda, 0x55605c60,
0xe65525f3, 0xaa55ab94, 0x57489862, 0x63e81440,
0x55ca396a, 0x2aab10b6, 0xb4cc5c34, 0x1141e8ce,
0xa15486af, 0x7c72e993, 0xb3ee1411, 0x636fbc2a,
0x2ba9c55d, 0x741831f6, 0xce5c3e16, 0x9b87931e,
0xafd6ba33, 0x6c24cf5c, 0x7a325381, 0x28958677,
0x3b8f4898, 0x6b4bb9af, 0xc4bfe81b, 0x66282193,
0x61d809cc, 0xfb21a991, 0x487cac60, 0x5dec8032,
0xef845d5d, 0xe98575b1, 0xdc262302, 0xeb651b88,
0x23893e81, 0xd396acc5, 0xf6d6ff3, 0x83f44239,
0x2e0b4482, 0xa4842004, 0x69c8f04a, 0x9e1f9b5e,
0x21c66842, 0xf6e96c9a, 0x670c9c61, 0xabd388f0,
0x6a51a0d2, 0xd8542f68, 0x960fa728, 0xab5133a3,
0x6eef0b6c, 0x137a3be4, 0xba3bf050, 0x7efb2a98,
0xa1f1651d, 0x39af0176, 0x66ca593e, 0x82430e88,
0x8cee8619, 0x456f9fb4, 0x7d84a5c3, 0x3b8b5ebe,
0xe06f75d8, 0x85c12073, 0x401a449f, 0x56c16aa6,
0x4ed3aa62, 0x363f7706, 0x1bfedf72, 0x429b023d,
0x37d0d724, 0xd00a1248, 0xdb0fead3, 0x49f1c09b,
0x75372c9, 0x80991b7b, 0x25d479d8, 0xf6e8def7,
0xe3fe501a, 0xb6794c3b, 0x976ce0bd, 0x4c006ba,
0xc1a94fb6, 0x409f60c4, 0x5e5c9ec2, 0x196a2463,
0x68fb6faf, 0x3e6c53b5, 0x1339b2eb, 0x3b52ec6f,
0x6dfc511f, 0x9b30952c, 0xcc814544, 0xaf5ebd09,
0xbee3d004, 0xde334afd, 0x660f2807, 0x192e4bb3,
0xc0cba857, 0x45c8740f, 0xd20b5f39, 0xb9d3fbdb,
0x5579c0bd, 0x1a60320a, 0xd6a100c6, 0x402c7279,
0x679f25fe, 0xfb1fa3cc, 0x8ea5e9f8, 0xdb3222f8,
0x3c7516df, 0xfd616b15, 0x2f501ec8, 0xad0552ab,
0x323db5fa, 0xfd238760, 0x53317b48, 0x3e00df82,
0x9e5c57bb, 0xca6f8ca0, 0x1a87562e, 0xdf1769db,
0xd542a8f6, 0x287effc3, 0xac6732c6, 0x8c4f5573,
0x695b27b0, 0xbbca58c8, 0xe1ffa35d, 0xb8f011a0,
0x10fa3d98, 0xfd2183b8, 0x4afcb56c, 0x2dd1d35b,
0x9a53e479, 0xb6f84565, 0xd28e49bc, 0x4bfb9790,
0xe1ddf2da, 0xa4cb7e33, 0x62fb1341, 0xcee4c6e8,
0xef20cada, 0x36774c01, 0xd07e9efe, 0x2bf11fb4,
0x95dbda4d, 0xae909198, 0xeaad8e71, 0x6b93d5a0,
0xd08ed1d0, 0xafc725e0, 0x8e3c5b2f, 0x8e7594b7,
0x8ff6e2fb, 0xf2122b64, 0x8888b812, 0x900df01c,
0x4fad5ea0, 0x688fc31c, 0xd1cff191, 0xb3a8c1ad,
0x2f2f2218, 0xbe0e1777, 0xea752dfe, 0x8b021fa1,
0xe5a0cc0f, 0xb56f74e8, 0x18acf3d6, 0xce89e299,
0xb4a84fe0, 0xfd13e0b7, 0x7cc43b81, 0xd2ada8d9,
0x165fa266, 0x80957705, 0x93cc7314, 0x211a1477,
0xe6ad2065, 0x77b5fa86, 0xc75442f5, 0xfb9d35cf,
0xebcdaf0c, 0x7b3e89a0, 0xd6411bd3, 0xae1e7e49, 0x250e2d,
0x2071b35e, 0x226800bb, 0x57b8e0af, 0x2464369b,
0xf009b91e, 0x5563911d, 0x59dfa6aa, 0x78c14389,
0xd95a537f, 0x207d5ba2, 0x2e5b9c5, 0x83260376,
0x6295cfa9, 0x11c81968, 0x4e734a41, 0xb3472dca,
0x7b14a94a, 0x1b510052, 0x9a532915, 0xd60f573f,
0xbc9bc6e4, 0x2b60a476, 0x81e67400, 0x8ba6fb5,
0x571be91f, 0xf296ec6b, 0x2a0dd915, 0xb6636521,
0xe7b9f9b6, 0xff34052e, 0xc5855664, 0x53b02d5d,
0xa99f8fa1, 0x8ba4799, 0x6e85076a };
static final int sbox_init_2[] = { 0x4b7a70e9, 0xb5b32944, 0xdb75092e, 0xc4192623,
0xad6ea6b0, 0x49a7df7d, 0x9cee60b8, 0x8fedb266,
0xecaa8c71, 0x699a17ff, 0x5664526c, 0xc2b19ee1,
0x193602a5, 0x75094c29, 0xa0591340, 0xe4183a3e,
0x3f54989a, 0x5b429d65, 0x6b8fe4d6, 0x99f73fd6,
0xa1d29c07, 0xefe830f5, 0x4d2d38e6, 0xf0255dc1,
0x4cdd2086, 0x8470eb26, 0x6382e9c6, 0x21ecc5e, 0x9686b3f,
0x3ebaefc9, 0x3c971814, 0x6b6a70a1, 0x687f3584,
0x52a0e286, 0xb79c5305, 0xaa500737, 0x3e07841c,
0x7fdeae5c, 0x8e7d44ec, 0x5716f2b8, 0xb03ada37,
0xf0500c0d, 0xf01c1f04, 0x200b3ff, 0xae0cf51a,
0x3cb574b2, 0x25837a58, 0xdc0921bd, 0xd19113f9,
0x7ca92ff6, 0x94324773, 0x22f54701, 0x3ae5e581,
0x37c2dadc, 0xc8b57634, 0x9af3dda7, 0xa9446146,
0xfd0030e, 0xecc8c73e, 0xa4751e41, 0xe238cd99,
0x3bea0e2f, 0x3280bba1, 0x183eb331, 0x4e548b38,
0x4f6db908, 0x6f420d03, 0xf60a04bf, 0x2cb81290,
0x24977c79, 0x5679b072, 0xbcaf89af, 0xde9a771f,
0xd9930810, 0xb38bae12, 0xdccf3f2e, 0x5512721f,
0x2e6b7124, 0x501adde6, 0x9f84cd87, 0x7a584718,
0x7408da17, 0xbc9f9abc, 0xe94b7d8c, 0xec7aec3a,
0xdb851dfa, 0x63094366, 0xc464c3d2, 0xef1c1847,
0x3215d908, 0xdd433b37, 0x24c2ba16, 0x12a14d43,
0x2a65c451, 0x50940002, 0x133ae4dd, 0x71dff89e,
0x10314e55, 0x81ac77d6, 0x5f11199b, 0x43556f1,
0xd7a3c76b, 0x3c11183b, 0x5924a509, 0xf28fe6ed,
0x97f1fbfa, 0x9ebabf2c, 0x1e153c6e, 0x86e34570,
0xeae96fb1, 0x860e5e0a, 0x5a3e2ab3, 0x771fe71c,
0x4e3d06fa, 0x2965dcb9, 0x99e71d0f, 0x803e89d6,
0x5266c825, 0x2e4cc978, 0x9c10b36a, 0xc6150eba,
0x94e2ea78, 0xa5fc3c53, 0x1e0a2df4, 0xf2f74ea7,
0x361d2b3d, 0x1939260f, 0x19c27960, 0x5223a708,
0xf71312b6, 0xebadfe6e, 0xeac31f66, 0xe3bc4595,
0xa67bc883, 0xb17f37d1, 0x18cff28, 0xc332ddef,
0xbe6c5aa5, 0x65582185, 0x68ab9802, 0xeecea50f,
0xdb2f953b, 0x2aef7dad, 0x5b6e2f84, 0x1521b628,
0x29076170, 0xecdd4775, 0x619f1510, 0x13cca830,
0xeb61bd96, 0x334fe1e, 0xaa0363cf, 0xb5735c90,
0x4c70a239, 0xd59e9e0b, 0xcbaade14, 0xeecc86bc,
0x60622ca7, 0x9cab5cab, 0xb2f3846e, 0x648b1eaf,
0x19bdf0ca, 0xa02369b9, 0x655abb50, 0x40685a32,
0x3c2ab4b3, 0x319ee9d5, 0xc021b8f7, 0x9b540b19,
0x875fa099, 0x95f7997e, 0x623d7da8, 0xf837889a,
0x97e32d77, 0x11ed935f, 0x16681281, 0xe358829,
0xc7e61fd6, 0x96dedfa1, 0x7858ba99, 0x57f584a5,
0x1b227263, 0x9b83c3ff, 0x1ac24696, 0xcdb30aeb,
0x532e3054, 0x8fd948e4, 0x6dbc3128, 0x58ebf2ef,
0x34c6ffea, 0xfe28ed61, 0xee7c3c73, 0x5d4a14d9,
0xe864b7e3, 0x42105d14, 0x203e13e0, 0x45eee2b6,
0xa3aaabea, 0xdb6c4f15, 0xfacb4fd0, 0xc742f442,
0xef6abbb5, 0x654f3b1d, 0x41cd2105, 0xd81e799e,
0x86854dc7, 0xe44b476a, 0x3d816250, 0xcf62a1f2,
0x5b8d2646, 0xfc8883a0, 0xc1c7b6a3, 0x7f1524c3,
0x69cb7492, 0x47848a0b, 0x5692b285, 0x95bbf00,
0xad19489d, 0x1462b174, 0x23820e00, 0x58428d2a,
0xc55f5ea, 0x1dadf43e, 0x233f7061, 0x3372f092,
0x8d937e41, 0xd65fecf1, 0x6c223bdb, 0x7cde3759,
0xcbee7460, 0x4085f2a7, 0xce77326e, 0xa6078084,
0x19f8509e, 0xe8efd855, 0x61d99735, 0xa969a7aa,
0xc50c06c2, 0x5a04abfc, 0x800bcadc, 0x9e447a2e,
0xc3453484, 0xfdd56705, 0xe1e9ec9, 0xdb73dbd3,
0x105588cd, 0x675fda79, 0xe3674340, 0xc5c43465,
0x713e38d8, 0x3d28f89e, 0xf16dff20, 0x153e21e7,
0x8fb03d4a, 0xe6e39f2b, 0xdb83adf7 };
static final int sbox_init_3[] = { 0xe93d5a68, 0x948140f7, 0xf64c261c, 0x94692934,
0x411520f7, 0x7602d4f7, 0xbcf46b2e, 0xd4a20068,
0xd4082471, 0x3320f46a, 0x43b7d4b7, 0x500061af,
0x1e39f62e, 0x97244546, 0x14214f74, 0xbf8b8840,
0x4d95fc1d, 0x96b591af, 0x70f4ddd3, 0x66a02f45,
0xbfbc09ec, 0x3bd9785, 0x7fac6dd0, 0x31cb8504,
0x96eb27b3, 0x55fd3941, 0xda2547e6, 0xabca0a9a,
0x28507825, 0x530429f4, 0xa2c86da, 0xe9b66dfb,
0x68dc1462, 0xd7486900, 0x680ec0a4, 0x27a18dee,
0x4f3ffea2, 0xe887ad8c, 0xb58ce006, 0x7af4d6b6,
0xaace1e7c, 0xd3375fec, 0xce78a399, 0x406b2a42,
0x20fe9e35, 0xd9f385b9, 0xee39d7ab, 0x3b124e8b,
0x1dc9faf7, 0x4b6d1856, 0x26a36631, 0xeae397b2,
0x3a6efa74, 0xdd5b4332, 0x6841e7f7, 0xca7820fb,
0xfb0af54e, 0xd8feb397, 0x454056ac, 0xba489527,
0x55533a3a, 0x20838d87, 0xfe6ba9b7, 0xd096954b,
0x55a867bc, 0xa1159a58, 0xcca92963, 0x99e1db33,
0xa62a4a56, 0x3f3125f9, 0x5ef47e1c, 0x9029317c,
0xfdf8e802, 0x4272f70, 0x80bb155c, 0x5282ce3, 0x95c11548,
0xe4c66d22, 0x48c1133f, 0xc70f86dc, 0x7f9c9ee,
0x41041f0f, 0x404779a4, 0x5d886e17, 0x325f51eb,
0xd59bc0d1, 0xf2bcc18f, 0x41113564, 0x257b7834,
0x602a9c60, 0xdff8e8a3, 0x1f636c1b, 0xe12b4c2, 0x2e1329e,
0xaf664fd1, 0xcad18115, 0x6b2395e0, 0x333e92e1,
0x3b240b62, 0xeebeb922, 0x85b2a20e, 0xe6ba0d99,
0xde720c8c, 0x2da2f728, 0xd0127845, 0x95b794fd,
0x647d0862, 0xe7ccf5f0, 0x5449a36f, 0x877d48fa,
0xc39dfd27, 0xf33e8d1e, 0xa476341, 0x992eff74,
0x3a6f6eab, 0xf4f8fd37, 0xa812dc60, 0xa1ebddf8,
0x991be14c, 0xdb6e6b0d, 0xc67b5510, 0x6d672c37,
0x2765d43b, 0xdcd0e804, 0xf1290dc7, 0xcc00ffa3,
0xb5390f92, 0x690fed0b, 0x667b9ffb, 0xcedb7d9c,
0xa091cf0b, 0xd9155ea3, 0xbb132f88, 0x515bad24,
0x7b9479bf, 0x763bd6eb, 0x37392eb3, 0xcc115979,
0x8026e297, 0xf42e312d, 0x6842ada7, 0xc66a2b3b,
0x12754ccc, 0x782ef11c, 0x6a124237, 0xb79251e7,
0x6a1bbe6, 0x4bfb6350, 0x1a6b1018, 0x11caedfa,
0x3d25bdd8, 0xe2e1c3c9, 0x44421659, 0xa121386,
0xd90cec6e, 0xd5abea2a, 0x64af674e, 0xda86a85f,
0xbebfe988, 0x64e4c3fe, 0x9dbc8057, 0xf0f7c086,
0x60787bf8, 0x6003604d, 0xd1fd8346, 0xf6381fb0,
0x7745ae04, 0xd736fccc, 0x83426b33, 0xf01eab71,
0xb0804187, 0x3c005e5f, 0x77a057be, 0xbde8ae24,
0x55464299, 0xbf582e61, 0x4e58f48f, 0xf2ddfda2,
0xf474ef38, 0x8789bdc2, 0x5366f9c3, 0xc8b38e74,
0xb475f255, 0x46fcd9b9, 0x7aeb2661, 0x8b1ddf84,
0x846a0e79, 0x915f95e2, 0x466e598e, 0x20b45770,
0x8cd55591, 0xc902de4c, 0xb90bace1, 0xbb8205d0,
0x11a86248, 0x7574a99e, 0xb77f19b6, 0xe0a9dc09,
0x662d09a1, 0xc4324633, 0xe85a1f02, 0x9f0be8c,
0x4a99a025, 0x1d6efe10, 0x1ab93d1d, 0xba5a4df,
0xa186f20f, 0x2868f169, 0xdcb7da83, 0x573906fe,
0xa1e2ce9b, 0x4fcd7f52, 0x50115e01, 0xa70683fa,
0xa002b5c4, 0xde6d027, 0x9af88c27, 0x773f8641,
0xc3604c06, 0x61a806b5, 0xf0177a28, 0xc0f586e0, 0x6058aa,
0x30dc7d62, 0x11e69ed7, 0x2338ea63, 0x53c2dd94,
0xc2c21634, 0xbbcbee56, 0x90bcb6de, 0xebfc7da1,
0xce591d76, 0x6f05e409, 0x4b7c0188, 0x39720a3d,
0x7c927c24, 0x86e3725f, 0x724d9db9, 0x1ac15bb4,
0xd39eb8fc, 0xed545578, 0x8fca5b5, 0xd83d7cd3,
0x4dad0fc4, 0x1e50ef5e, 0xb161e6f8, 0xa28514d9,
0x6c51133c, 0x6fd5c7e7, 0x56e14ec4, 0x362abfce,
0xddc6c837, 0xd79a3234, 0x92638212, 0x670efa8e,
0x406000e0 };
static final int sbox_init_4[] = { 0x3a39ce37, 0xd3faf5cf, 0xabc27737, 0x5ac52d1b,
0x5cb0679e, 0x4fa33742, 0xd3822740, 0x99bc9bbe,
0xd5118e9d, 0xbf0f7315, 0xd62d1c7e, 0xc700c47b,
0xb78c1b6b, 0x21a19045, 0xb26eb1be, 0x6a366eb4,
0x5748ab2f, 0xbc946e79, 0xc6a376d2, 0x6549c2c8,
0x530ff8ee, 0x468dde7d, 0xd5730a1d, 0x4cd04dc6,
0x2939bbdb, 0xa9ba4650, 0xac9526e8, 0xbe5ee304,
0xa1fad5f0, 0x6a2d519a, 0x63ef8ce2, 0x9a86ee22,
0xc089c2b8, 0x43242ef6, 0xa51e03aa, 0x9cf2d0a4,
0x83c061ba, 0x9be96a4d, 0x8fe51550, 0xba645bd6,
0x2826a2f9, 0xa73a3ae1, 0x4ba99586, 0xef5562e9,
0xc72fefd3, 0xf752f7da, 0x3f046f69, 0x77fa0a59,
0x80e4a915, 0x87b08601, 0x9b09e6ad, 0x3b3ee593,
0xe990fd5a, 0x9e34d797, 0x2cf0b7d9, 0x22b8b51,
0x96d5ac3a, 0x17da67d, 0xd1cf3ed6, 0x7c7d2d28,
0x1f9f25cf, 0xadf2b89b, 0x5ad6b472, 0x5a88f54c,
0xe029ac71, 0xe019a5e6, 0x47b0acfd, 0xed93fa9b,
0xe8d3c48d, 0x283b57cc, 0xf8d56629, 0x79132e28,
0x785f0191, 0xed756055, 0xf7960e44, 0xe3d35e8c,
0x15056dd4, 0x88f46dba, 0x3a16125, 0x564f0bd, 0xc3eb9e15,
0x3c9057a2, 0x97271aec, 0xa93a072a, 0x1b3f6d9b,
0x1e6321f5, 0xf59c66fb, 0x26dcf319, 0x7533d928,
0xb155fdf5, 0x3563482, 0x8aba3cbb, 0x28517711,
0xc20ad9f8, 0xabcc5167, 0xccad925f, 0x4de81751,
0x3830dc8e, 0x379d5862, 0x9320f991, 0xea7a90c2,
0xfb3e7bce, 0x5121ce64, 0x774fbe32, 0xa8b6e37e,
0xc3293d46, 0x48de5369, 0x6413e680, 0xa2ae0810,
0xdd6db224, 0x69852dfd, 0x9072166, 0xb39a460a,
0x6445c0dd, 0x586cdecf, 0x1c20c8ae, 0x5bbef7dd,
0x1b588d40, 0xccd2017f, 0x6bb4e3bb, 0xdda26a7e,
0x3a59ff45, 0x3e350a44, 0xbcb4cdd5, 0x72eacea8,
0xfa6484bb, 0x8d6612ae, 0xbf3c6f47, 0xd29be463,
0x542f5d9e, 0xaec2771b, 0xf64e6370, 0x740e0d8d,
0xe75b1357, 0xf8721671, 0xaf537d5d, 0x4040cb08,
0x4eb4e2cc, 0x34d2466a, 0x115af84, 0xe1b00428,
0x95983a1d, 0x6b89fb4, 0xce6ea048, 0x6f3f3b82,
0x3520ab82, 0x11a1d4b, 0x277227f8, 0x611560b1,
0xe7933fdc, 0xbb3a792b, 0x344525bd, 0xa08839e1,
0x51ce794b, 0x2f32c9b7, 0xa01fbac9, 0xe01cc87e,
0xbcc7d1f6, 0xcf0111c3, 0xa1e8aac7, 0x1a908749,
0xd44fbd9a, 0xd0dadecb, 0xd50ada38, 0x339c32a,
0xc6913667, 0x8df9317c, 0xe0b12b4f, 0xf79e59b7,
0x43f5bb3a, 0xf2d519ff, 0x27d9459c, 0xbf97222c,
0x15e6fc2a, 0xf91fc71, 0x9b941525, 0xfae59361,
0xceb69ceb, 0xc2a86459, 0x12baa8d1, 0xb6c1075e,
0xe3056a0c, 0x10d25065, 0xcb03a442, 0xe0ec6e0e,
0x1698db3b, 0x4c98a0be, 0x3278e964, 0x9f1f9532,
0xe0d392df, 0xd3a0342b, 0x8971f21e, 0x1b0a7441,
0x4ba3348c, 0xc5be7120, 0xc37632d8, 0xdf359f8d,
0x9b992f2e, 0xe60b6f47, 0xfe3f11d, 0xe54cda54,
0x1edad891, 0xce6279cf, 0xcd3e7e6f, 0x1618b166,
0xfd2c1d05, 0x848fd2c5, 0xf6fb2299, 0xf523f357,
0xa6327623, 0x93a83531, 0x56cccd02, 0xacf08162,
0x5a75ebb5, 0x6e163697, 0x88d273cc, 0xde966292,
0x81b949d0, 0x4c50901b, 0x71c65614, 0xe6c6c7bd,
0x327a140a, 0x45e1d006, 0xc3f27b9a, 0xc9aa53fd,
0x62a80f00, 0xbb25bfe2, 0x35bdd2f6, 0x71126905,
0xb2040222, 0xb6cbcf7c, 0xcd769c2b, 0x53113ec0,
0x1640e3d3, 0x38abbd60, 0x2547adf0, 0xba38209c,
0xf746ce76, 0x77afa1c5, 0x20756060, 0x85cbfe4e,
0x8ae88dd8, 0x7aaaf9b0, 0x4cf9aa7e, 0x1948c25c,
0x2fb8a8c, 0x1c36ae4, 0xd6ebe1f9, 0x90d4f869, 0xa65cdea0,
0x3f09252d, 0xc208e69f, 0xb74e6132, 0xce77e25b,
0x578fdfe3, 0x3ac372e6 };
public BlowfishECB(byte bfkey[]) {
m_pbox = new int[18];
for (int nI = 0; nI < 18; nI++) {
m_pbox[nI] = pbox_init[nI];
}
m_sbox1 = new int[256];
m_sbox2 = new int[256];
m_sbox3 = new int[256];
m_sbox4 = new int[256];
for (int nI = 0; nI < 256; nI++) {
m_sbox1[nI] = sbox_init_1[nI];
m_sbox2[nI] = sbox_init_2[nI];
m_sbox3[nI] = sbox_init_3[nI];
m_sbox4[nI] = sbox_init_4[nI];
}
int nLen = bfkey.length;
if (nLen == 0) {
return;
}
int nKeyPos = 0;
int nBuild = 0;
for (int nI = 0; nI < 18; nI++) {
for (int nJ = 0; nJ < 4; nJ++) {
nBuild = nBuild << 8 | bfkey[nKeyPos] & 0xff;
if (++nKeyPos == nLen) {
nKeyPos = 0;
}
}
m_pbox[nI] ^= nBuild;
}
long lZero = 0L;
for (int nI = 0; nI < 18; nI += 2) {
lZero = encryptBlock(lZero);
m_pbox[nI] = (int) (lZero >>> 32);
m_pbox[nI + 1] = (int) (lZero & 0xffffffffL);
}
for (int nI = 0; nI < 256; nI += 2) {
lZero = encryptBlock(lZero);
m_sbox1[nI] = (int) (lZero >>> 32);
m_sbox1[nI + 1] = (int) (lZero & 0xffffffffL);
}
for (int nI = 0; nI < 256; nI += 2) {
lZero = encryptBlock(lZero);
m_sbox2[nI] = (int) (lZero >>> 32);
m_sbox2[nI + 1] = (int) (lZero & 0xffffffffL);
}
for (int nI = 0; nI < 256; nI += 2) {
lZero = encryptBlock(lZero);
m_sbox3[nI] = (int) (lZero >>> 32);
m_sbox3[nI + 1] = (int) (lZero & 0xffffffffL);
}
for (int nI = 0; nI < 256; nI += 2) {
lZero = encryptBlock(lZero);
m_sbox4[nI] = (int) (lZero >>> 32);
m_sbox4[nI + 1] = (int) (lZero & 0xffffffffL);
}
}
}
public Blowfish(String password) {
MessageDigest digest = null;
try {
digest = MessageDigest.getInstance("SHA1");
digest.update(password.getBytes());
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
m_bfish = new BlowfishCBC(digest.digest(), 0L);
digest.reset();
}
public String encryptString(String sPlainText) {
long lCBCIV;
synchronized (m_rndGen) {
lCBCIV = m_rndGen.nextLong();
}
return encStr(sPlainText, lCBCIV);
}
private String encStr(String sPlainText, long lNewCBCIV) {
int nStrLen = sPlainText.length();
byte buf[] = new byte[(nStrLen << 1 & -8) + 8];
int nPos = 0;
for (int nI = 0; nI < nStrLen; nI++) {
char cActChar = sPlainText.charAt(nI);
buf[nPos++] = (byte) (cActChar >> 8 & 0xff);
buf[nPos++] = (byte) (cActChar & 0xff);
}
byte bPadVal = (byte) (buf.length - (nStrLen << 1));
while (nPos < buf.length) {
buf[nPos++] = bPadVal;
}
m_bfish.setCBCIV(lNewCBCIV);
m_bfish.encrypt(buf);
byte newCBCIV[] = new byte[8];
longToByteArray(lNewCBCIV, newCBCIV, 0);
return bytesToBinHex(newCBCIV, 0, 8) + bytesToBinHex(buf, 0, buf.length);
}
public String decryptString(String sCipherText) {
int nLen = sCipherText.length() >> 1 & -8;
if (nLen < 8) {
return null;
}
byte cbciv[] = new byte[8];
int nNumOfBytes = binHexToBytes(sCipherText, cbciv, 0, 0, 8);
if (nNumOfBytes < 8) {
return null;
}
m_bfish.setCBCIV(cbciv);
if ((nLen -= 8) == 0) {
return "";
}
byte buf[] = new byte[nLen];
nNumOfBytes = binHexToBytes(sCipherText, buf, 16, 0, nLen);
if (nNumOfBytes < nLen) {
return null;
}
m_bfish.decrypt(buf);
int nPadByte = buf[buf.length - 1] & 0xff;
if (nPadByte > 8 || nPadByte < 0) {
nPadByte = 0;
}
nNumOfBytes -= nPadByte;
if (nNumOfBytes < 0) {
return "";
} else {
return byteArrayToUNCString(buf, 0, nNumOfBytes);
}
}
public void destroy() {
m_bfish.cleanUp();
}
private static long byteArrayToLong(byte buffer[], int nStartIndex) {
return (long) buffer[nStartIndex] << 56 | (buffer[nStartIndex + 1] & 255L) << 48
| (buffer[nStartIndex + 2] & 255L) << 40
| (buffer[nStartIndex + 3] & 255L) << 32
| (buffer[nStartIndex + 4] & 255L) << 24
| (buffer[nStartIndex + 5] & 255L) << 16
| (buffer[nStartIndex + 6] & 255L) << 8 | buffer[nStartIndex + 7]
& 255L;
}
private static void longToByteArray(long lValue, byte buffer[], int nStartIndex) {
buffer[nStartIndex] = (byte) (int) (lValue >>> 56);
buffer[nStartIndex + 1] = (byte) (int) (lValue >>> 48 & 255L);
buffer[nStartIndex + 2] = (byte) (int) (lValue >>> 40 & 255L);
buffer[nStartIndex + 3] = (byte) (int) (lValue >>> 32 & 255L);
buffer[nStartIndex + 4] = (byte) (int) (lValue >>> 24 & 255L);
buffer[nStartIndex + 5] = (byte) (int) (lValue >>> 16 & 255L);
buffer[nStartIndex + 6] = (byte) (int) (lValue >>> 8 & 255L);
buffer[nStartIndex + 7] = (byte) (int) lValue;
}
private static long makeLong(int nLo, int nHi) {
return (long) nHi << 32 | nLo & 0xffffffffL;
}
private static int longLo32(long lVal) {
return (int) lVal;
}
private static int longHi32(long lVal) {
return (int) (lVal >>> 32);
}
private static String bytesToBinHex(byte data[], int nStartPos, int nNumOfBytes) {
StringBuffer sbuf = new StringBuffer();
sbuf.setLength(nNumOfBytes << 1);
int nPos = 0;
for (int nI = 0; nI < nNumOfBytes; nI++) {
sbuf.setCharAt(nPos++, HEXTAB[data[nI + nStartPos] >> 4 & 0xf]);
sbuf.setCharAt(nPos++, HEXTAB[data[nI + nStartPos] & 0xf]);
}
return sbuf.toString();
}
private static int binHexToBytes(String sBinHex, byte data[], int nSrcPos, int nDstPos,
int nNumOfBytes) {
int nStrLen = sBinHex.length();
int nAvailBytes = nStrLen - nSrcPos >> 1;
if (nAvailBytes < nNumOfBytes) {
nNumOfBytes = nAvailBytes;
}
int nOutputCapacity = data.length - nDstPos;
if (nNumOfBytes > nOutputCapacity) {
nNumOfBytes = nOutputCapacity;
}
int nResult = 0;
for (int nI = 0; nI < nNumOfBytes; nI++) {
byte bActByte = 0;
boolean blConvertOK = true;
for (int nJ = 0; nJ < 2; nJ++) {
bActByte <<= 4;
char cActChar = sBinHex.charAt(nSrcPos++);
if (cActChar >= 'a' && cActChar <= 'f') {
bActByte |= (byte) (cActChar - 97) + 10;
continue;
}
if (cActChar >= '0' && cActChar <= '9') {
bActByte |= (byte) (cActChar - 48);
} else {
blConvertOK = false;
}
}
if (blConvertOK) {
data[nDstPos++] = bActByte;
nResult++;
}
}
return nResult;
}
private static String byteArrayToUNCString(byte data[], int nStartPos, int nNumOfBytes) {
nNumOfBytes &= -2;
int nAvailCapacity = data.length - nStartPos;
if (nAvailCapacity < nNumOfBytes) {
nNumOfBytes = nAvailCapacity;
}
StringBuffer sbuf = new StringBuffer();
sbuf.setLength(nNumOfBytes >> 1);
int nSBufPos = 0;
for (; nNumOfBytes > 0; nNumOfBytes -= 2) {
sbuf.setCharAt(nSBufPos++, (char) (data[nStartPos] << 8 | data[nStartPos + 1] & 0xff));
nStartPos += 2;
}
return sbuf.toString();
}
private BlowfishCBC m_bfish;
private static Random m_rndGen = new Random();
static final char HEXTAB[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
}以上是“Java语言如何实现Blowfish加密算法”这篇文章的所有内容，感谢各位的阅读！相信大家都有了一定的了解，希望分享的内容对大家有所帮助，如果还想学习更多知识，欢迎关注创新互联行业资讯频道！
