java中的3DES加密

java中的3DES加密，上代码：

package com.picc.custportrait.utils.decode;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;

/**
* Base64编码工具类
*/
public class Base64Utils {
private static final char[] legalChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".toCharArray();

public static String encode(byte[] data) {
int start = 0;
int len = data.length;
StringBuffer buf = new StringBuffer(data.length * 3 / 2);

int end = len - 3;
int i = start;
int n = 0;

while (i <= end) {
int d = ((((int) data[i]) & 0x0ff) << 16) | ((((int) data[i + 1]) & 0x0ff) << 8) | (((int) data[i + 2]) & 0x0ff);

buf.append(legalChars[(d >> 18) & 63]);
buf.append(legalChars[(d >> 12) & 63]);
buf.append(legalChars[(d >> 6) & 63]);
buf.append(legalChars[d & 63]);

i += 3;

if (n++ >= 14) {
n = 0;
buf.append(" ");
}
}

if (i == start + len - 2) {
int d = ((((int) data[i]) & 0x0ff) << 16) | ((((int) data[i + 1]) & 255) << 8);

buf.append(legalChars[(d >> 18) & 63]);
buf.append(legalChars[(d >> 12) & 63]);
buf.append(legalChars[(d >> 6) & 63]);
buf.append("=");
} else if (i == start + len - 1) {
int d = (((int) data[i]) & 0x0ff) << 16;

buf.append(legalChars[(d >> 18) & 63]);
buf.append(legalChars[(d >> 12) & 63]);
buf.append("==");
}

return buf.toString();
}

private static int decode(char c) {
if (c >= 'A' && c <= 'Z') {
return ((int) c) - 65;
} else if (c >= 'a' && c <= 'z') {
return ((int) c) - 97 + 26;
} else if (c >= '0' && c <= '9') {
return ((int) c) - 48 + 26 + 26;
} else {
switch (c) {
case '+':
return 62;
case '/':
return 63;
case '=':
return 0;
default:
throw new RuntimeException("unexpected code: " + c);
}
}
}

/**
* Decodes the given Base64 encoded String to a new byte array. The byte array holding the decoded data is returned.
*/

public static byte[] decode(String s) {

ByteArrayOutputStream bos = new ByteArrayOutputStream();
try {
decode(s, bos);
} catch (IOException e) {
throw new RuntimeException();
}
byte[] decodedBytes = bos.toByteArray();
try {
bos.close();
bos = null;
} catch (IOException ex) {
System.err.println("Error while decoding BASE64: " + ex.toString());
}
return decodedBytes;
}

private static void decode(String s, OutputStream os) throws IOException {
int i = 0;

int len = s.length();

while (true) {
while (i < len && s.charAt(i) <= ' ') {
i++;
}

if (i == len) {
break;
}

int tri = (decode(s.charAt(i)) << 18) + (decode(s.charAt(i + 1)) << 12) + (decode(s.charAt(i + 2)) << 6) + (decode(s.charAt(i + 3)));

os.write((tri >> 16) & 255);
if (s.charAt(i + 2) == '=') {
break;
}
os.write((tri >> 8) & 255);
if (s.charAt(i + 3) == '=') {
break;
}
os.write(tri & 255);

i += 4;
}
}
}

package com.picc.custportrait.utils.decode;

import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;
import javax.crypto.spec.IvParameterSpec;
import java.security.InvalidKeyException;
import java.security.Key;

/**
* 3DES加密工具类
*/
public class SecretUtils {
// 定义加密算法，有DES、DESede(即3DES)、Blowfish
private static final String DES_ALGORITHM = "DESede";
// 密钥
// 生产环境
// private static final String secretKey = "2019PiccACRMCustPortrait";
// 测试环境
private static final String secretKey = "2019ABCDACPortraitRMCust";

// 向量
// 生产环境
// private final static String iv = "ac1rm9cp";
// 测试环境
private final static String iv = "012acrm3";
// 加解密统一使用的编码方式
private final static String encoding = "utf-8";

/**
* 3DES加密
*
* @param plainText 普通文本
* @return
* @throws Exception
* @throws Exception
*/
public static String encode(String plainText) throws Exception {
Key deskey = null;
DESedeKeySpec spec;
spec = new DESedeKeySpec(secretKey.getBytes());
SecretKeyFactory keyfactory = SecretKeyFactory
.getInstance(DES_ALGORITHM);
deskey = keyfactory.generateSecret(spec);
Cipher cipher = Cipher.getInstance("desede/CBC/PKCS5Padding");
IvParameterSpec ips = new IvParameterSpec(iv.getBytes());
cipher.init(Cipher.ENCRYPT_MODE, deskey, ips);
byte[] encryptData = cipher.doFinal(plainText.getBytes(encoding));
return Base64Utils.encode(encryptData);

}

/**
* 3DES解密
*
* @param encryptText 加密文本
* @return
* @throws InvalidKeyException
* @throws Exception
*/
public static String decode(String encryptText) throws Exception {
Key deskey = null;
DESedeKeySpec spec;
byte[] decryptData = null;
spec = new DESedeKeySpec(secretKey.getBytes());
SecretKeyFactory keyfactory = SecretKeyFactory
.getInstance(DES_ALGORITHM);
deskey = keyfactory.generateSecret(spec);
Cipher cipher = Cipher.getInstance("desede/CBC/PKCS5Padding");
IvParameterSpec ips = new IvParameterSpec(iv.getBytes());
cipher.init(Cipher.DECRYPT_MODE, deskey, ips);
decryptData = cipher.doFinal(Base64Utils.decode(encryptText));
return new String(decryptData, encoding);

}

// public static void main(String[] agrs) {
// String asaa = null;
// try {
// asaa = encode("0000京LZ5827");
// System.out.println("加密后：" + asaa);
//
// System.out.println("加密前：" + decode(asaa));
//
// asaa = encode("ACRM08521963");
//
// System.out.println("加密后：" + asaa);
//
// System.out.println("加密前：" + decode(asaa));
// } catch (Exception e) {
// // TODO Auto-generated catch block
// e.printStackTrace();
// }
//
// }
}