Java处理url加揭秘

发布时间：2021-11-24 15:14:10 所属栏目：教程来源：互联网

导读：1.加密 Java代码 MessageDigest md = MessageDigest.getInstance(MD5); byte[] byteKeyMd5 = md.digest(encryptKey.getBytes()); byte[] byteKey = new byte[24]; System.arraycopy(byteKeyMd5, 0, byteKey, 0, 16); System.arraycopy(byteKeyMd5, 0, byteKey

1.加密
Java代码
MessageDigest md = MessageDigest.getInstance("MD5");
byte[] byteKeyMd5 = md.digest(encryptKey.getBytes());

byte[] byteKey = new byte[24];
System.arraycopy(byteKeyMd5, 0, byteKey, 0, 16);
System.arraycopy(byteKeyMd5, 0, byteKey, 16, 8);

Key deskey = null;
DESedeKeySpec spec = new DESedeKeySpec(byteKey);
SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
deskey = keyfactory.generateSecret(spec);
Cipher cipher = Cipher.getInstance("DESede/ECB/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, deskey);
byte[] encryptedBytes = cipher.doFinal(source.getBytes("UTF-8"));

BASE64Encoder encoder = new BASE64Encoder();
encryptedString = encoder.encode(encryptedBytes);

2.解密
Java代码
byte[] decodedBytes;
BASE64Decoder decoder = new BASE64Decoder();
decodedBytes = decoder.decodeBuffer(cipherText);

MessageDigest md = MessageDigest.getInstance("MD5");
byte[] byteKeyMd5 = md.digest(decryptKey.getBytes());

byte[] byteKey = new byte[24];
System.arraycopy(byteKeyMd5, 0, byteKey, 0, 16);
System.arraycopy(byteKeyMd5, 0, byteKey, 16, 8);

Key deskey = null;
DESedeKeySpec spec = new DESedeKeySpec(byteKey);
SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
deskey = keyfactory.generateSecret(spec);
Cipher cipher = Cipher.getInstance("DESede/ECB/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, deskey);

byte[] plainTextBytes = cipher.doFinal(decodedBytes);
plainText = new String(plainTextBytes);

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