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package com.sun;
import org.apache.commons.codec.binary.Base64;
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
/**
* @ClassName DigestExample
* @Description TODO
* @Author chenzhuo
* @Date 2018/11/4 18:31
* @Version 1.0
**/
public class DigestExample {
public static void main(String[] args) throws NoSuchAlgorithmException {
/* String content ="ktrans@1-12";
MessageDigest sha = MessageDigest.getInstance("sha");
byte[] shaSecretBytes = sha.digest(content.getBytes());
System.out.print("sha 加密 : { " + new String(Base64.encodeBase64(shaSecretBytes)) + " }\n\r");*/
String i = encryptBASE64("ktrans@1-12");
System.out.println("i : " +i );
String s = decryptBASE64(i);
System.out.println("s:" + s );
}
/**
* AES加密
*
* @param content
* 需要加密的内容
* @param password
* 加密密码
* @return
*/
public static byte[] encryptAES(String content, String password) {
try {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(128, new SecureRandom(password.getBytes()));
SecretKey secretKey = kgen.generateKey();
byte[] enCodeFormat = secretKey.getEncoded();
SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
Cipher cipher = Cipher.getInstance("AES");// 创建密码器
byte[] byteContent = content.getBytes("utf-8");
cipher.init(Cipher.ENCRYPT_MODE, key);// 初始化
byte[] result = cipher.doFinal(byteContent);
return result; // 加密
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (NoSuchPaddingException e) {
e.printStackTrace();
} catch (InvalidKeyException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (IllegalBlockSizeException e) {
e.printStackTrace();
} catch (BadPaddingException e) {
e.printStackTrace();
}
return null;
}
/**
* AES解密
*
* @param content
* 待解密内容
* @param password
* 解密密钥
* @return
*/
public static byte[] decryptAES(byte[] content, String password) {
try {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(128, new SecureRandom(password.getBytes()));
SecretKey secretKey = kgen.generateKey();
byte[] enCodeFormat = secretKey.getEncoded();
SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
Cipher cipher = Cipher.getInstance("AES");// 创建密码器
cipher.init(Cipher.DECRYPT_MODE, key);// 初始化
byte[] result = cipher.doFinal(content);
return result; // 加密
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (NoSuchPaddingException e) {
e.printStackTrace();
} catch (InvalidKeyException e) {
e.printStackTrace();
} catch (IllegalBlockSizeException e) {
e.printStackTrace();
} catch (BadPaddingException e) {
e.printStackTrace();
}
return null;
}
/**
* BASE64解密
*
* @param key
* @return
* @throws Exception
*/
public static String decryptBASE64(String key) {
byte[] b1 = Base64.decodeBase64(key);
return new String(b1);
}
/**
* BASE64加密
*
* @param key
* @return
* @throws Exception
*/
public static String encryptBASE64(String key) {
byte[] b = Base64.encodeBase64(key.getBytes(), true);
String str = new String(b);
return str;
}
}