package com.xxxx.tax.util;
import com.xxxxx.tax.util.ExceptionUtil;
import lombok.extern.log4j.Log4j;
import java.io.ByteArrayOutputStream;
import java.security.Key;
import java.security.KeyFactory;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.Signature;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import java.util.HashMap;
import java.util.Map;
import org.apache.commons.codec.binary.Base64;
import javax.crypto.Cipher;
@Log4j
public class RSAUtils {
/** *//**
* 加密算法RSA
*/
public static final String KEY_ALGORITHM = "RSA";
/** *//**
* 签名算法
*/
public static final String SIGNATURE_ALGORITHM = "MD5withRSA";
/** *//**
* 获取公钥的key
*/
private static final String PUBLIC_KEY = "RSAPublicKey";
/** *//**
* 获取私钥的key
*/
private static final String PRIVATE_KEY = "RSAPrivateKey";
/** *//**
* RSA最大加密明文大小
*/
private static final int MAX_ENCRYPT_BLOCK = 117;
/** *//**
* RSA最大解密密文大小
*/
private static final int MAX_DECRYPT_BLOCK = 128;
/** *//**
* <p>
* 生成密钥对(公钥和私钥)
* </p>
*
* @return
* @throws Exception
*/
public static Map<String, Object> genKeyPair() throws Exception {
KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance(KEY_ALGORITHM);
keyPairGen.initialize(1024);
KeyPair keyPair = keyPairGen.generateKeyPair();
RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();
RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();
Map<String, Object> keyMap = new HashMap<String, Object>(2);
String publicKeyString = new String(Base64Util.encode(publicKey.getEncoded()));
// 得到私钥字符串
String privateKeyString = new String(Base64Util.encode((privateKey.getEncoded())));
System.out.println(publicKeyString);
System.out.println(privateKeyString);
keyMap.put(PUBLIC_KEY, publicKey);
keyMap.put(PRIVATE_KEY, privateKey);
return keyMap;
}
/** *//**
* <p>
* 用私钥对信息生成数字签名
* </p>
*
* @param data 已加密数据
* @param privateKey 私钥(BASE64编码)
*
* @return
* @throws Exception
*/
public static String sign(byte[] data, String privateKey) throws Exception {
byte[] keyBytes = Base64Util.decode(privateKey);
PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
PrivateKey privateK = keyFactory.generatePrivate(pkcs8KeySpec);
Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);
signature.initSign(privateK);
signature.update(data);
return Base64Util.encode(signature.sign());
}
/** *//**
* <p>
* 校验数字签名
* </p>
*
* @param data 已加密数据
* @param publicKey 公钥(BASE64编码)
* @param sign 数字签名
*
* @return
* @throws Exception
*
*/
public static boolean verify(byte[] data, String publicKey, String sign)
throws Exception {
byte[] keyBytes = Base64Util.decode(publicKey);
X509EncodedKeySpec keySpec = new X509EncodedKeySpec(keyBytes);
KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
PublicKey publicK = keyFactory.generatePublic(keySpec);
Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);
signature.initVerify(publicK);
signature.update(data);
return signature.verify(Base64Util.decode(sign));
}
/** *//**
* <P>
* 私钥解密
* </p>
*
* @param encryptedData 已加密数据
* @param privateKey 私钥(BASE64编码)
* @return
* @throws Exception
*/
public static String decryptByPrivateKey(byte[] encryptedData, String privateKey)
throws Exception {
byte[] keyBytes = Base64Util.decode(privateKey);
PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
Key privateK = keyFactory.generatePrivate(pkcs8KeySpec);
Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
cipher.init(Cipher.DECRYPT_MODE, privateK);
int inputLen = encryptedData.length;
ByteArrayOutputStream out = new ByteArrayOutputStream();
int offSet = 0;
byte[] cache;
int i = 0;
// 对数据分段解密
while (inputLen - offSet > 0) {
if (inputLen - offSet > MAX_DECRYPT_BLOCK) {
cache = cipher.doFinal(encryptedData, offSet, MAX_DECRYPT_BLOCK);
} else {
cache = cipher.doFinal(encryptedData, offSet, inputLen - offSet);
}
out.write(cache, 0, cache.length);
i++;
offSet = i * MAX_DECRYPT_BLOCK;
}
byte[] decryptedData = out.toByteArray();
out.close();
return Base64Util.encode(decryptedData);
}
/**
* 公钥解密
*
* @param publicKeyText
* @param text
* @return
* @throws Exception
*/
public static String decryptByPublicKey(String publicKeyText, String text) throws Exception {
X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(Base64.decodeBase64(publicKeyText));
KeyFactory keyFactory = KeyFactory.getInstance("RSA");
PublicKey publicKey = keyFactory.generatePublic(x509EncodedKeySpec);
Cipher cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.DECRYPT_MODE, publicKey);
byte[] result = cipher.doFinal(Base64.decodeBase64(text));
return new String(result);
}
/** *//**
* <p>
* 公钥解密
* </p>
*
* @param encryptedData 已加密数据
* @param publicKey 公钥(BASE64编码)
* @return
* @throws Exception
*/
public static byte[] decryptByPublicKey(byte[] encryptedData, String publicKey)
throws Exception {
byte[] keyBytes = Base64Util.decode(publicKey);
X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
Key publicK = keyFactory.generatePublic(x509KeySpec);
Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
cipher.init(Cipher.DECRYPT_MODE, publicK);
int inputLen = encryptedData.length;
ByteArrayOutputStream out = new ByteArrayOutputStream();
int offSet = 0;
byte[] cache;
int i = 0;
// 对数据分段解密
while (inputLen - offSet > 0) {
if (inputLen - offSet > MAX_DECRYPT_BLOCK) {
cache = cipher.doFinal(encryptedData, offSet, MAX_DECRYPT_BLOCK);
} else {
cache = cipher.doFinal(encryptedData, offSet, inputLen - offSet);
}
out.write(cache, 0, cache.length);
i++;
offSet = i * MAX_DECRYPT_BLOCK;
}
byte[] decryptedData = out.toByteArray();
out.close();
return decryptedData;
}
/** *//**
* <p>
* 公钥加密
* </p>
*
* @param data 源数据
* @param publicKey 公钥(BASE64编码)
* @return
* @throws Exception
*/
public static String encryptByPublicKey(byte[] data, String publicKey)
throws Exception {
byte[] keyBytes = Base64Util.decode(publicKey);
X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
Key publicK = keyFactory.generatePublic(x509KeySpec);
// 对数据加密
Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
cipher.init(Cipher.ENCRYPT_MODE, publicK);
int inputLen = data.length;
ByteArrayOutputStream out = new ByteArrayOutputStream();
int offSet = 0;
byte[] cache;
int i = 0;
// 对数据分段加密
while (inputLen - offSet > 0) {
if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {
cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);
} else {
cache = cipher.doFinal(data, offSet, inputLen - offSet);
}
out.write(cache, 0, cache.length);
i++;
offSet = i * MAX_ENCRYPT_BLOCK;
}
byte[] encryptedData = out.toByteArray();
out.close();
//return Base64Util.encode(encryptedData);
return bytesToHexString(encryptedData);
}
/** *//**
* <p>
* 公钥加密
* </p>
*
* @param data 源数据
* @param publicKey 公钥(BASE64编码)
* @return
* @throws Exception
*/
public static String encryptByPublicKeyByBase(byte[] data, String publicKey)
throws Exception {
byte[] keyBytes = Base64Util.decode(publicKey);
X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
Key publicK = keyFactory.generatePublic(x509KeySpec);
// 对数据加密
Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
cipher.init(Cipher.ENCRYPT_MODE, publicK);
int inputLen = data.length;
ByteArrayOutputStream out = new ByteArrayOutputStream();
int offSet = 0;
byte[] cache;
int i = 0;
// 对数据分段加密
while (inputLen - offSet > 0) {
if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {
cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);
} else {
cache = cipher.doFinal(data, offSet, inputLen - offSet);
}
out.write(cache, 0, cache.length);
i++;
offSet = i * MAX_ENCRYPT_BLOCK;
}
byte[] encryptedData = out.toByteArray();
out.close();
return Base64Util.encode(encryptedData);
// return bytesToHexString(encryptedData);
}
/**
* 将字节数组转换成16进制字符串
* @param bytes 即将转换的数据
* @return 16进制字符串
*/
public static String bytesToHexString(byte[] bytes) {
StringBuffer sb = new StringBuffer(bytes.length);
String temp = null;
for (int i = 0; i < bytes.length; i++) {
temp = Integer.toHexString(0xFF & bytes[i]);
if (temp.length() < 2) {
sb.append(0);
}
sb.append(temp);
}
return sb.toString();
}
/** *//**
* <p>
* 私钥加密
* </p>
*
* @param data 源数据
* @param privateKey 私钥(BASE64编码)
* @return
* @throws Exception
*/
public static byte[] encryptByPrivateKey(byte[] data, String privateKey)
throws Exception {
byte[] keyBytes = Base64Util.decode(privateKey);
PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
Key privateK = keyFactory.generatePrivate(pkcs8KeySpec);
Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
cipher.init(Cipher.ENCRYPT_MODE, privateK);
int inputLen = data.length;
ByteArrayOutputStream out = new ByteArrayOutputStream();
int offSet = 0;
byte[] cache;
int i = 0;
// 对数据分段加密
while (inputLen - offSet > 0) {
if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {
cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);
} else {
cache = cipher.doFinal(data, offSet, inputLen - offSet);
}
out.write(cache, 0, cache.length);
i++;
offSet = i * MAX_ENCRYPT_BLOCK;
}
byte[] encryptedData = out.toByteArray();
out.close();
return encryptedData;
}
/** *//**
* <p>
* 获取私钥
* </p>
*
* @param keyMap 密钥对
* @return
* @throws Exception
*/
public static String getPrivateKey(Map<String, Object> keyMap)
throws Exception {
Key key = (Key) keyMap.get(PRIVATE_KEY);
return Base64Util.encode(key.getEncoded());
}
/** *//**
* <p>
* 获取公钥
* </p>
*
* @param keyMap 密钥对
* @return
* @throws Exception
*/
public static String getPublicKey(Map<String, Object> keyMap)
throws Exception {
Key key = (Key) keyMap.get(PUBLIC_KEY);
return Base64Util.encode(key.getEncoded());
}
public static void main(String[] args){
try {
//RSAUtils.genKeyPair();
String IMAGE_PRIVATEKEY = "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";
String IMAGE_PUBLICKEY = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC8DcES7liaO4MziCQ0EmtrZ7LudmxBEpiNcgvv6TxEOLal4rsoQKnLcBV2Pe6i2pFAXaBrP+AnI1Pck1YxTAROZMmkJ3BfN08CKA8mZUuVaGC/IHDV7fUU3ppVEVWF6btVsaDg+tF+k9uLlK5KOAIhKbuRNh7ZjcqRC8ZSVD1qqwIDAQAB";
String str = "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";
String res = new String(Base64Util.decode(RSAUtils.decryptByPrivateKey(Base64Util.decode(str), IMAGE_PRIVATEKEY)));
System.out.println(res);
String ss = RSAUtils.encryptByPublicKey("abcdef".getBytes(), IMAGE_PUBLICKEY);
System.out.println(ss);
} catch (Exception e) {
log.error(ExceptionUtil.getMessage(e));
}
}
}如有问题，请私信。
xObP8s/gudi/zrPMoaJKU7K5u7e+s7/Os8yhokpBVkHP4LnYv86zzMjn0OjSqtKyv8nS1MGqz7VRUaGjDQoNCtf31d8gUVEgNDA0NTQwMjI5题，请私信
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