Java での Blowfish 暗号化アルゴリズムの簡単な実装のコード例

数日前、突然インターネット上に噂が浮上しました。東東で12Gデータ漏洩が発生しました。結局、東東は声明で否定しませんでしたが、しぶしぶ認めました。この事件がどのような影響を与えるのか、すでに多くの人が疑問に思っています。そうは言っても、私はプログラマーにとって実用的な話をしましょう。現時点で私が比較的安全だと考えている暗号化アルゴリズムについて話しましょう。 ：ふぐ。 コードに進む前に、Blowfish 暗号化アルゴリズムのいくつかの機能について説明します。

1. 対称暗号化、つまり、暗号化キーと復号化キーは同じです。それぞれの暗号化後の結果は異なります (これは私にとってさらにありがたいことです)。

• 4. 以前の記事で紹介した
md5
• や他の要約アルゴリズムとは異なり、可逆的です。高速で、暗号化と復号化のプロセスは基本的に ADD と XOR 命令で構成されます

• 5. BlowFish は、毎回暗号化することしかできません。そして 8 バイトのデータを復号化します
  次のステップは最も重要な部分であり、Blowfish 暗号化アルゴリズムの実装です:

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);
    }
}

• これは外部

  インターフェース

  で、使い方は非常に簡単で、非常に使いやすいです。アルゴリズムの具体的な実装は次のとおりです:

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 >= &#39;a&#39; && cActChar <= &#39;f&#39;) {
                    bActByte |= (byte) (cActChar - 97) + 10;
                    continue;
                }
                if (cActChar >= &#39;0&#39; && cActChar <= &#39;9&#39;) {
                    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[] = { &#39;0&#39;, &#39;1&#39;, &#39;2&#39;, &#39;3&#39;, &#39;4&#39;, &#39;5&#39;, &#39;6&#39;, &#39;7&#39;, &#39;8&#39;, &#39;9&#39;, &#39;a&#39;, &#39;b&#39;, &#39;c&#39;, &#39;d&#39;, &#39;e&#39;, &#39;f&#39; };

}

以上がJava での Blowfish 暗号化アルゴリズムの簡単な実装のコード例の詳細内容です。詳細については、PHP 中国語 Web サイトの他の関連記事を参照してください。