Java使用SM2对ZIP文件进行加解密
1. 引言
随着互联网的发展和数据传输的广泛应用,数据加密变得越来越重要。SM2是中国自主研发的一种非对称加密算法,与国际常用的RSA算法相比,SM2具有更高的安全性和更高的效率。本文将介绍如何使用Java编程语言使用SM2对ZIP文件进行加解密。
2. SM2简介
SM2是中国国家密码管理局发布的非对称加密算法,采用椭圆曲线加密算法。与RSA算法相比,SM2具有更高的安全性和更高的效率。SM2使用公私钥对进行加解密,其中公钥用于加密,私钥用于解密。
3. 加密流程
下面是使用SM2对ZIP文件进行加密的流程图:
flowchart TD
A[生成SM2公私钥对] --> B[读取待加密的ZIP文件]
B --> C[生成随机对称密钥]
C --> D[使用对称密钥对ZIP文件进行加密]
D --> E[使用SM2公钥对对称密钥进行加密]
E --> F[生成加密后的ZIP文件]
4. 代码示例
生成SM2公私钥对
import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
import org.bouncycastle.crypto.generators.ECKeyPairGenerator;
import org.bouncycastle.crypto.params.AsymmetricKeyParameter;
import org.bouncycastle.crypto.params.ECKeyGenerationParameters;
import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
import org.bouncycastle.crypto.params.ECPublicKeyParameters;
import org.bouncycastle.jce.ECNamedCurveTable;
import org.bouncycastle.jce.spec.ECNamedCurveParameterSpec;
import java.security.SecureRandom;
public class SM2KeyGenerator {
public static AsymmetricCipherKeyPair generateKeyPair() {
ECNamedCurveParameterSpec sm2Spec = ECNamedCurveTable.getParameterSpec("sm2p256v1");
ECKeyGenerationParameters keyGenParams = new ECKeyGenerationParameters(sm2Spec, new SecureRandom());
ECKeyPairGenerator generator = new ECKeyPairGenerator();
generator.init(keyGenParams);
return generator.generateKeyPair();
}
public static void main(String[] args) {
AsymmetricCipherKeyPair keyPair = generateKeyPair();
ECPrivateKeyParameters privateKey = (ECPrivateKeyParameters) keyPair.getPrivate();
ECPublicKeyParameters publicKey = (ECPublicKeyParameters) keyPair.getPublic();
System.out.println("Private Key: " + privateKey.getD().toString(16));
System.out.println("Public Key: " + publicKey.getQ().getXCoord().toBigInteger().toString(16)
+ publicKey.getQ().getYCoord().toBigInteger().toString(16));
}
}
读取待加密的ZIP文件
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
public class ZIPFileReader {
public static void readZIPFile(String filePath) throws IOException {
File file = new File(filePath);
FileInputStream fis = new FileInputStream(file);
ZipInputStream zis = new ZipInputStream(fis);
ZipEntry entry;
while ((entry = zis.getNextEntry()) != null) {
System.out.println("File: " + entry.getName());
// 处理ZIP文件中的内容
zis.closeEntry();
}
zis.close();
fis.close();
}
public static void main(String[] args) {
try {
readZIPFile("path/to/zip/file.zip");
} catch (IOException e) {
e.printStackTrace();
}
}
}
生成随机对称密钥
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import java.security.NoSuchAlgorithmException;
public class SymmetricKeyGenerator {
public static SecretKey generateSymmetricKey(int keySize) throws NoSuchAlgorithmException {
KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
keyGenerator.init(keySize);
return keyGenerator.generateKey();
}
public static void main(String[] args) {
try {
SecretKey symmetricKey = generateSymmetricKey(128);
System.out.println("Symmetric Key: " + symmetricKey.toString());
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
}
}
使用对称密钥对ZIP文件进行加密
import javax.crypto.*;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuch