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小編給大家分享一下Java語言如何實現Blowfish加密算法，相信大部分人都還不怎么了解，因此分享這篇文章給大家參考一下，希望大家閱讀完這篇文章后大有收獲，下面讓我們一起去了解一下吧！
前幾天網上突然出現流言：某東發生數據泄露12G，最終某東在一篇聲明中沒有否認，還算是勉強承認了吧，這件事對于一般人有什么影響、應該怎么做已經有一堆人說了，所以就不湊熱鬧了，咱來點對程序猿來說實際點的，說一個個人認為目前比較安全的加密算法：Blowfish。
上代碼之前，先說幾點Blowfish加密算法的特點：
1. 對稱加密，即加密的密鑰和解密的密鑰是相同的；
2. 每次加密之后的結果是不同的（這也是老夫比較欣賞的一點）；
3. 可逆的，和老夫之前的文章介紹的md5等摘要算法不一樣，他是可逆的；
4. 速度快，加密和解密的過程基本上由ADD和XOR指令運算組成；
5. 免費，任何人都可以免費使用不需要繳納版權費；
6. BlowFish 每次只能加密和解密8字節數據；
Blowfish算法是一種對稱的分組加密算法，算法核心在于子密鑰生成，它將變長密鑰擴展成總長4168Byte的子密鑰數組。算法中使用了大量的子密鑰，而子密鑰又依賴于用戶密鑰，實際加/解密過程中使用的是更新后的子密鑰數組，子密鑰即P數組和S盒。Blowfish算法有一個核心加密函數:BF_En()，該函數的輸人是64位明文信息，經過運算，以64位密文信息的形式輸出。用Blowfish算法加密信息，需要兩個過程:密鑰預處理和信息加密。同樣，解密亦需要兩個過程，密鑰預處理和信息解密。
Blowfish算法的源密鑰——pbox和sbox是固定的，而我們要加密一個信息，需要自己選擇一個key，用這個key對pbox和sbox進行變換，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是對稱加密算法，解密方在得到key后根據key生成解密所需的key_box和key_sbox。對同一個信息加密解密，選取的key的不同會導致密文的不同。因此，Blowfish算法的關鍵在于key的選擇以及保密。
由于Blowfish算法采用變長密鑰，這在給用戶帶來極大便利的同時也有隱患。由于算法加/解密核心在于密鑰的選擇和保密，但在實際應用中經常使用一些弱密鑰對信息資源進行加密，導致存在著很大的安全隱患
接下來就是最重要的部分，Blowfish加密算法的實現：
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);
}
}這是對外的接口，使用起來非常簡單，對用戶很友好，下面是算法的具體實現：
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語言如何實現Blowfish加密算法”這篇文章的所有內容，感謝各位的閱讀！相信大家都有了一定的了解，希望分享的內容對大家有所幫助，如果還想學習更多知識，歡迎關注億速云行業資訊頻道！
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