添加rsa
This commit is contained in:
xiangwb
@@ -0,0 +1,255 @@
|
||||
package com.xwbing.util;
|
||||
|
||||
import org.bouncycastle.asn1.ASN1Sequence;
|
||||
import org.bouncycastle.asn1.pkcs.RSAPrivateKeyStructure;
|
||||
import sun.misc.BASE64Decoder;
|
||||
import sun.misc.BASE64Encoder;
|
||||
|
||||
import javax.crypto.BadPaddingException;
|
||||
import javax.crypto.Cipher;
|
||||
import javax.crypto.IllegalBlockSizeException;
|
||||
import javax.crypto.NoSuchPaddingException;
|
||||
import java.io.*;
|
||||
import java.security.InvalidKeyException;
|
||||
import java.security.KeyFactory;
|
||||
import java.security.NoSuchAlgorithmException;
|
||||
import java.security.interfaces.RSAPrivateKey;
|
||||
import java.security.interfaces.RSAPublicKey;
|
||||
import java.security.spec.InvalidKeySpecException;
|
||||
import java.security.spec.RSAPrivateKeySpec;
|
||||
import java.security.spec.X509EncodedKeySpec;
|
||||
|
||||
/**
|
||||
* 项目名称: boot-module-demo
|
||||
* 创建时间: 2017/11/20 16:26
|
||||
* 作者: xiangwb
|
||||
* 说明:
|
||||
*/
|
||||
public class RSAUtil {
|
||||
|
||||
/**
|
||||
* 从文件中加载公钥 测试的时候使用
|
||||
*
|
||||
* @return
|
||||
* @throws Exception
|
||||
*/
|
||||
public static RSAPublicKey loadPublicKey() throws Exception {
|
||||
try {
|
||||
String filePath = RSAUtil.class.getClassLoader()
|
||||
.getResource("rsa_public_key.pem").getPath();
|
||||
InputStream in = new FileInputStream(filePath);
|
||||
BufferedReader br = new BufferedReader(new InputStreamReader(in));
|
||||
String readLine;
|
||||
StringBuilder sb = new StringBuilder();
|
||||
while ((readLine = br.readLine()) != null) {
|
||||
if (readLine.charAt(0) == '-') {
|
||||
continue;
|
||||
} else {
|
||||
sb.append(readLine);
|
||||
sb.append('\r');
|
||||
}
|
||||
}
|
||||
br.close();
|
||||
return loadPublicKey(sb.toString());
|
||||
} catch (IOException e) {
|
||||
throw new Exception("公钥数据流读取错误");
|
||||
} catch (NullPointerException e) {
|
||||
throw new Exception("公钥输入流为空");
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* 从字符串中加载公钥
|
||||
*
|
||||
* @param publicKeyStr 公钥数据字符串
|
||||
* @throws Exception 加载公钥时产生的异常
|
||||
*/
|
||||
public static RSAPublicKey loadPublicKey(String publicKeyStr)
|
||||
throws Exception {
|
||||
try {
|
||||
BASE64Decoder base64Decoder = new BASE64Decoder();
|
||||
byte[] buffer = base64Decoder.decodeBuffer(publicKeyStr);
|
||||
KeyFactory keyFactory = KeyFactory.getInstance("RSA");
|
||||
X509EncodedKeySpec keySpec = new X509EncodedKeySpec(buffer);
|
||||
return (RSAPublicKey) keyFactory.generatePublic(keySpec);
|
||||
} catch (NoSuchAlgorithmException e) {
|
||||
throw new Exception("无此算法");
|
||||
} catch (InvalidKeySpecException e) {
|
||||
throw new Exception("公钥非法");
|
||||
} catch (IOException e) {
|
||||
throw new Exception("公钥数据内容读取错误");
|
||||
} catch (NullPointerException e) {
|
||||
throw new Exception("公钥数据为空");
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* 从文件中加载私钥 测试的时候使用 私钥文件名
|
||||
*
|
||||
* @return 是否成功
|
||||
* @throws Exception
|
||||
*/
|
||||
public static RSAPrivateKey loadPrivateKey() throws Exception {
|
||||
try {
|
||||
String filePath = RSAUtil.class.getClassLoader()
|
||||
.getResource("rsa_private_key.pem").getPath();
|
||||
InputStream in = new FileInputStream(filePath);
|
||||
BufferedReader br = new BufferedReader(new InputStreamReader(in));
|
||||
String readLine;
|
||||
StringBuilder sb = new StringBuilder();
|
||||
while ((readLine = br.readLine()) != null) {
|
||||
if (readLine.charAt(0) == '-') {
|
||||
continue;
|
||||
} else {
|
||||
sb.append(readLine);
|
||||
sb.append('\r');
|
||||
}
|
||||
}
|
||||
br.close();
|
||||
return loadPrivateKey(sb.toString());
|
||||
} catch (IOException e) {
|
||||
throw new Exception("私钥数据读取错误");
|
||||
} catch (NullPointerException e) {
|
||||
throw new Exception("私钥输入流为空");
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* 功能描述： 从字符串中加载私钥
|
||||
*
|
||||
* @param privateKeyStr
|
||||
* @return
|
||||
* @throws Exception
|
||||
*/
|
||||
public static RSAPrivateKey loadPrivateKey(String privateKeyStr)
|
||||
throws Exception {
|
||||
try {
|
||||
BASE64Decoder base64Decoder = new BASE64Decoder();
|
||||
byte[] priKeyData = base64Decoder.decodeBuffer(privateKeyStr);
|
||||
// 读pkcs#8码
|
||||
// PKCS8EncodedKeySpec keySpec= new PKCS8EncodedKeySpec(priKeyData);
|
||||
// 读pkcs#1码(传统私钥格式)
|
||||
RSAPrivateKeyStructure asn1PrivKey = new RSAPrivateKeyStructure(
|
||||
(ASN1Sequence) ASN1Sequence.fromByteArray(priKeyData));
|
||||
RSAPrivateKeySpec rsaPrivKeySpec = new RSAPrivateKeySpec(
|
||||
asn1PrivKey.getModulus(), asn1PrivKey.getPrivateExponent());
|
||||
KeyFactory keyFactory = KeyFactory.getInstance("RSA");
|
||||
return (RSAPrivateKey) keyFactory.generatePrivate(rsaPrivKeySpec);
|
||||
} catch (NoSuchAlgorithmException e) {
|
||||
throw new Exception("无此算法");
|
||||
} catch (InvalidKeySpecException e) {
|
||||
throw new Exception("私钥非法");
|
||||
} catch (IOException e) {
|
||||
throw new Exception("私钥数据内容读取错误");
|
||||
} catch (NullPointerException e) {
|
||||
throw new Exception("私钥数据为空");
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* 加密过程
|
||||
*
|
||||
* @param publicKey 公钥 明文数据
|
||||
* @return
|
||||
* @throws Exception 加密过程中的异常信息
|
||||
*/
|
||||
public static String encrypt(RSAPublicKey publicKey, String data)
|
||||
throws Exception {
|
||||
if (publicKey == null) {
|
||||
throw new Exception("加密公钥为空, 请设置");
|
||||
}
|
||||
byte[] plainTextData = data.getBytes();
|
||||
Cipher cipher;
|
||||
try {
|
||||
cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");// 得到Cipher对象来实现对源数据的RSA加密
|
||||
cipher.init(Cipher.ENCRYPT_MODE, publicKey);
|
||||
byte[] output = cipher.doFinal(plainTextData);// 执行加密操作
|
||||
BASE64Encoder base64Encoder = new BASE64Encoder();
|
||||
return base64Encoder.encode(output);// Base64编码成字符串
|
||||
} catch (NoSuchAlgorithmException e) {
|
||||
throw new Exception("无此加密算法");
|
||||
} catch (NoSuchPaddingException e) {
|
||||
e.printStackTrace();
|
||||
return null;
|
||||
} catch (InvalidKeyException e) {
|
||||
throw new Exception("加密公钥非法,请检查");
|
||||
} catch (IllegalBlockSizeException e) {
|
||||
throw new Exception("明文长度非法");
|
||||
} catch (BadPaddingException e) {
|
||||
throw new Exception("明文数据已损坏");
|
||||
}
|
||||
}
|
||||
|
||||
/***
|
||||
* 默认加密方式
|
||||
*
|
||||
* @param data
|
||||
* @return
|
||||
* @throws Exception
|
||||
*/
|
||||
public static String encrypt(String data) throws Exception {
|
||||
return encrypt(loadPublicKey(), data);
|
||||
}
|
||||
|
||||
/**
|
||||
* 解密过程
|
||||
*
|
||||
* @param privateKey 私钥 密文数据
|
||||
* @return 明文
|
||||
* @throws Exception 解密过程中的异常信息
|
||||
*/
|
||||
public static String decrypt(RSAPrivateKey privateKey, String data) throws Exception {
|
||||
if (privateKey == null) {
|
||||
throw new Exception("解密私钥为空, 请设置");
|
||||
}
|
||||
BASE64Decoder base64Decoder = new BASE64Decoder();
|
||||
byte[] cipherData = base64Decoder.decodeBuffer(data);
|
||||
Cipher cipher;
|
||||
try {
|
||||
cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
|
||||
cipher.init(Cipher.DECRYPT_MODE, privateKey);
|
||||
byte[] output = cipher.doFinal(cipherData);
|
||||
return new String(output);
|
||||
} catch (NoSuchAlgorithmException e) {
|
||||
throw new Exception("无此解密算法");
|
||||
} catch (NoSuchPaddingException e) {
|
||||
e.printStackTrace();
|
||||
return null;
|
||||
} catch (InvalidKeyException e) {
|
||||
throw new Exception("解密私钥非法,请检查");
|
||||
} catch (IllegalBlockSizeException e) {
|
||||
throw new Exception("密文长度非法");
|
||||
} catch (BadPaddingException e) {
|
||||
throw new Exception("密文数据已损坏");
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* 功能描述： 默认解密方式
|
||||
*
|
||||
* @param data
|
||||
* @return
|
||||
* @throws Exception
|
||||
*/
|
||||
public static String decrypt(String data) throws Exception {
|
||||
return decrypt(loadPrivateKey(), data);
|
||||
}
|
||||
|
||||
public static void main(String[] args) throws Exception {
|
||||
String en = testJiami();// 密文
|
||||
String de = testJiemi(en);// 明文
|
||||
System.out.println(de);
|
||||
}
|
||||
|
||||
private static String testJiami() throws Exception {
|
||||
String plainText = encrypt(loadPublicKey(), "123456");
|
||||
System.out.println("加密结果:" + plainText);
|
||||
return plainText;
|
||||
}
|
||||
|
||||
private static String testJiemi(String str) throws Exception {
|
||||
String plainText = decrypt(loadPrivateKey(), str);
|
||||
System.out.println("解密结果:" + plainText);
|
||||
return plainText;
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user