com.lehuipay.leona.utils.RSAEncrypt Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of leona-java Show documentation
Show all versions of leona-java Show documentation
leona-java is a http development kit.
package com.lehuipay.leona.utils;
import com.lehuipay.leona.exception.LeonaErrorCodeEnum;
import com.lehuipay.leona.exception.LeonaRuntimeException;
import org.apache.commons.codec.binary.Base64;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import java.security.InvalidKeyException;
import java.security.KeyFactory;
import java.security.NoSuchAlgorithmException;
import java.security.Signature;
import java.security.SignatureException;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
public class RSAEncrypt {
private static final String CHARSET_UTF8 = "UTF-8";
private static final String RSA_ALGORITHM = "RSA"; // ALGORITHM ['ælgərɪð(ə)m] 算法的意思
private static final String RSA_HAS256_SIGNATURE = "SHA256WithRSA";
/**
* 从字符串中加载公钥
*
* @param publicKeyStr 公钥字符串
* @throws LeonaRuntimeException
*/
public static RSAPublicKey getPublicKey(String publicKeyStr) {
try {
byte[] buffer = new Base64().decode(publicKeyStr);
KeyFactory keyFactory = KeyFactory.getInstance(RSA_ALGORITHM);
X509EncodedKeySpec keySpec = new X509EncodedKeySpec(buffer);
return (RSAPublicKey) keyFactory.generatePublic(keySpec);
} catch (NoSuchAlgorithmException e) {
throw new LeonaRuntimeException(e);
} catch (InvalidKeySpecException | NullPointerException e) {
throw new LeonaRuntimeException("公钥非法", e);
}
}
/**
* 从字符串中加载私钥
*
* @param privateKeyStr 私钥数据字符串
* @return
* @throws LeonaRuntimeException
*/
public static RSAPrivateKey getPrivateKey(String privateKeyStr) {
try {
byte[] buffer = new Base64().decode(privateKeyStr);
PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(buffer);
KeyFactory keyFactory = KeyFactory.getInstance(RSA_ALGORITHM);
return (RSAPrivateKey) keyFactory.generatePrivate(keySpec);
} catch (NoSuchAlgorithmException e) {
throw new LeonaRuntimeException(e);
} catch (InvalidKeySpecException | NullPointerException e) {
throw new LeonaRuntimeException("私钥非法", e);
}
}
/**
* 公钥加密
*
* @param publicKey 公钥
* @param plainTextData 明文数据
* @return 公钥解密后的数据
* @throws LeonaRuntimeException 加密异常
*/
public static byte[] publicEncrypt(RSAPublicKey publicKey, String plainTextData) {
if (publicKey == null) {
throw new LeonaRuntimeException("加密公钥为空, 请设置");
}
Cipher cipher = null;
try {
// 使用默认RSA
cipher = Cipher.getInstance(RSA_ALGORITHM);
// cipher= Cipher.getInstance(RSA_ALGORITHM, new BouncyCastleProvider());
cipher.init(Cipher.ENCRYPT_MODE, publicKey);
return cipher.doFinal(plainTextData.getBytes());
} catch (NoSuchAlgorithmException | NoSuchPaddingException e) {
throw new LeonaRuntimeException(e);
} catch (InvalidKeyException e) {
throw new LeonaRuntimeException("加密公钥非法,请检查", e);
} catch (IllegalBlockSizeException | BadPaddingException e) {
throw new LeonaRuntimeException(LeonaErrorCodeEnum.RSA_PUBLIC_ENCRYPTION_FAIL, e);
}
}
/**
* 私钥加密过程
*
* @param privateKey 私钥
* @param plainTextData 明文数据
* @return 私钥加密内容
* @throws LeonaRuntimeException 加密过程中的异常信息
*/
public static byte[] privateEncrypt(RSAPrivateKey privateKey, String plainTextData)
throws LeonaRuntimeException {
if (privateKey == null) {
throw new LeonaRuntimeException("加密私钥为空, 请设置");
}
Cipher cipher = null;
try {
// 使用默认RSA
cipher = Cipher.getInstance(RSA_ALGORITHM);
cipher.init(Cipher.ENCRYPT_MODE, privateKey);
return cipher.doFinal(plainTextData.getBytes());
} catch (NoSuchAlgorithmException | NoSuchPaddingException e) {
throw new LeonaRuntimeException(e);
} catch (InvalidKeyException e) {
throw new LeonaRuntimeException("加密私钥非法,请检查", e);
} catch (IllegalBlockSizeException | BadPaddingException e) {
throw new LeonaRuntimeException(LeonaErrorCodeEnum.RSA_PRIVATE_ENCRYPTION_FAIL, e);
}
}
/**
* 私钥解密过程
*
* @param privateKey 私钥
* @param cipherData 密文数据
* @return 明文
* @throws LeonaRuntimeException 解密过程中的异常信息
*/
public static byte[] privateDecrypt(RSAPrivateKey privateKey, byte[] cipherData)
throws LeonaRuntimeException {
if (privateKey == null) {
throw new LeonaRuntimeException("解密私钥为空, 请设置");
}
Cipher cipher = null;
try {
// 使用默认RSA
cipher = Cipher.getInstance(RSA_ALGORITHM);
// cipher= Cipher.getInstance(RSA_ALGORITHM, new BouncyCastleProvider());
cipher.init(Cipher.DECRYPT_MODE, privateKey);
return cipher.doFinal(cipherData);
} catch (NoSuchAlgorithmException | NoSuchPaddingException e) {
throw new LeonaRuntimeException(e);
} catch (InvalidKeyException e) {
throw new LeonaRuntimeException("解密私钥非法,请检查", e);
} catch (IllegalBlockSizeException | BadPaddingException e) {
throw new LeonaRuntimeException(LeonaErrorCodeEnum.RSA_PRIVATE_DECRYPTION_FAIL, e);
}
}
/**
* 公钥解密过程
*
* @param publicKey 公钥
* @param cipherData 密文数据
* @return 明文
* @throws LeonaRuntimeException 解密过程中的异常信息
*/
public static byte[] publicDecrypt(RSAPublicKey publicKey, byte[] cipherData)
throws LeonaRuntimeException {
if (publicKey == null) {
throw new LeonaRuntimeException("解密公钥为空, 请设置");
}
Cipher cipher = null;
try {
// 使用默认RSA
cipher = Cipher.getInstance(RSA_ALGORITHM);
// cipher= Cipher.getInstance(RSA_ALGORITHM, new BouncyCastleProvider());
cipher.init(Cipher.DECRYPT_MODE, publicKey);
return cipher.doFinal(cipherData);
} catch (NoSuchAlgorithmException | NoSuchPaddingException e) {
throw new LeonaRuntimeException("无此解密算法", e);
} catch (InvalidKeyException e) {
throw new LeonaRuntimeException("解密公钥非法,请检查", e);
} catch (IllegalBlockSizeException | BadPaddingException e) {
throw new LeonaRuntimeException(LeonaErrorCodeEnum.RSA_PUBLIC_DECRYPTION_FAIL, e);
}
}
/**
* rsa签名
*
* @param data 原始数据
* @param privateKey 私钥
* @return 数据的签名
* @throws LeonaRuntimeException RSA签名异常
*/
public static byte[] sign(byte[] data, RSAPrivateKey privateKey) throws LeonaRuntimeException {
try {
Signature signature = Signature.getInstance(RSA_HAS256_SIGNATURE);
signature.initSign(privateKey);
signature.update(data);
return signature.sign();
} catch (NoSuchAlgorithmException e) {
throw new LeonaRuntimeException(e);
} catch (InvalidKeyException e) {
throw new LeonaRuntimeException("RSA加签私钥非法, 请检查", e);
} catch (SignatureException e) {
throw new LeonaRuntimeException(LeonaErrorCodeEnum.RSA_ENCRYPTION_SIGN_FAIL, e);
}
}
/**
* rsa验签
*
* @param content 数据
* @param sign 数据签名
* @param publicKey 公钥
* @return RSA验签结果
* @throws LeonaRuntimeException 验签异常
*/
public static boolean verify(byte[] content, byte[] sign, RSAPublicKey publicKey) throws LeonaRuntimeException {
//获取Signature实例，指定签名算法(与之前一致)
Signature signature = null;
try {
signature = Signature.getInstance(RSA_HAS256_SIGNATURE);
//加载公钥
signature.initVerify(publicKey);
//更新原数据
signature.update(content);
//公钥验签（true-验签通过；false-验签失败）
return signature.verify(sign);
} catch (NoSuchAlgorithmException e) {
throw new LeonaRuntimeException(e);
} catch (InvalidKeyException e) {
throw new LeonaRuntimeException("RSA验签公钥非法, 请检查", e);
} catch (SignatureException e) {
throw new LeonaRuntimeException(LeonaErrorCodeEnum.RSA_ENCRYPTION_VERIFY_FAIL, e);
}
}
}
© 2015 - 2025 Weber Informatics LLC | Privacy Policy