Base64（四）

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/** * Created by y0n on 2017/4/21. */public class JavaCrackMe04 {    private static char[] key = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=".toCharArray();    public static char[] encode(byte[] var0) {        char[] var1 = new char[(var0.length + 2) / 3 << 2];        int var2 = 0;        for(int var3 = 0; var2 < var0.length; var3 += 4) {            boolean var4 = false;            boolean var5 = false;            int var6 = (var6 = 255 & var0[var2]) << 8;            if(var2 + 1 < var0.length) {                var6 |= 255 & var0[var2 + 1];                var5 = true;            }            var6 <<= 8;            if(var2 + 2 < var0.length) {                var6 |= 255 & var0[var2 + 2];                var4 = true;            }            var1[var3 + 3] = key[var4?var6 & 63:64];            var6 >>= 6;            var1[var3 + 2] = key[var5?var6 & 63:64];            var6 >>= 6;            var1[var3 + 1] = key[var6 & 63];            var6 >>= 6;            var1[var3] = key[var6 & 63];            var2 += 3;        }        return var1;    }    public static char[] DeCode(byte[] cipherText) {        char[] var1 = new char[(cipherText.length + 2) / 4 << 2];        int var2 = 0;        int []tempj = new int[20];        for(int var3 = 0; var2 < cipherText.length; var3 += 3) {            boolean var4 = false;            boolean var5 = false;            //boolean var7 = false;            for (int i =0; i < cipherText.length; i++)            {                for (int j = 0; j < 64; j++)                if (cipherText[i] == key[j])                {                    tempj[i] = j;                    break;                }            }            int var6 = (var6 = 63 & tempj[var2]) << 6;            if(var2 + 1 < cipherText.length) {                var6 |= 63 & tempj[var2 + 1];                var5 = true;            }            var6 <<= 6;            if(var2 + 2 < cipherText.length) {                var6 |= 63 & tempj[var2 + 2];                var4 = true;            }            var6 <<= 6;            if(var2 + 3 < cipherText.length) {                var6 |= 63 & tempj[var2 + 3];               // var7 = true;            }            var1[var3 + 2] = (char)(var6 & 255);//key[var4?var6 & 255:64];            var6 >>= 8;            var1[var3 + 1] = (char)(var6 & 255);//key[var5?var6 & 255:64];            var6 >>= 8;            var1[var3] = (char)(var6);            var2 += 4;        }        return var1;    }    public static void main(String []args)    {        char[] a = encode("y0n".getBytes());        System.out.print("密文：");        for (int i = 0; i < a.length; i++)            System.out.print(a[i]);        System.out.println();        char[] b = DeCode("eTBu".getBytes());        System.out.print("明文：");        for (int i = 0; i < b.length; i++)            System.out.print(b[i]);            }}
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