很高兴为您提供Java8 Spring Boot国密SM2加解密的完整实现和详细注释。以下是实现步骤和代码示例。

步骤1:添加依赖项

为了使用SM2算法,我们需要添加Bouncy Castle库作为依赖项。在pom.xml文件中添加以下依赖项:

<dependency>
    <groupId>org.bouncycastle</groupId>
    <artifactId>bcpkix-jdk15on</artifactId>
    <version>1.68</version>
</dependency>

步骤2:生成SM2密钥对

为了进行加解密操作,我们需要生成SM2密钥对。以下代码演示了如何生成密钥对:

import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
import org.bouncycastle.crypto.generators.ECKeyPairGenerator;
import org.bouncycastle.crypto.params.ECKeyGenerationParameters;
import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
import org.bouncycastle.crypto.params.ECPublicKeyParameters;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.math.ec.ECCurve;
import org.bouncycastle.math.ec.ECPoint;
import java.security.Security;

public class SM2Util {

    public static void main(String[] args) {
        Security.addProvider(new BouncyCastleProvider());

        // 生成SM2密钥对
        AsymmetricCipherKeyPair keyPair = generateSM2KeyPair();
        ECPrivateKeyParameters privateKey = (ECPrivateKeyParameters) keyPair.getPrivate();
        ECPublicKeyParameters publicKey = (ECPublicKeyParameters) keyPair.getPublic();

        System.out.println("SM2 Private Key: " + privateKey.getD().toString(16));
        System.out.println("SM2 Public Key: " + publicKey.getQ().toString(16));
    }

    public static AsymmetricCipherKeyPair generateSM2KeyPair() {
        // 定义SM2算法的椭圆曲线参数
        ECCurve curve = ECNamedCurveTable.getByName("sm2p256v1");

        // 定义SM2密钥生成器
        ECKeyPairGenerator keyGen = new ECKeyPairGenerator();
        ECKeyGenerationParameters keyParams = new ECKeyGenerationParameters(curve, new SecureRandom());

        // 初始化SM2密钥生成器
        keyGen.init(keyParams);

        // 生成SM2密钥对
        AsymmetricCipherKeyPair keyPair = keyGen.generateKeyPair();

        return keyPair;
    }
}

注意,这里使用了Bouncy Castle库提供的SM2密钥生成器生成密钥对。默认情况下,SM2算法使用的是sm2p256v1椭圆曲线。您可以通过ECNamedCurveTable类获取其他曲线参数。

步骤3:SM2加密

现在我们已经有了SM2密钥对,我们可以使用它们进行加密。以下代码演示了如何使用SM2加密:

import org.bouncycastle.crypto.CipherParameters;
import org.bouncycastle.crypto.InvalidCipherTextException;
import org.bouncycastle.crypto.engines.SM2Engine;
import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
import org.bouncycastle.crypto.params.ECPublicKeyParameters;
import org.bouncycastle.crypto.params.ParametersWithRandom;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.util.encoders.Hex;
import java.security.Security;

public class SM2Util {

    public static void main(String[] args) throws InvalidCipherTextException {
        Security.addProvider(new BouncyCastleProvider());

        // 生成SM2密钥对
        AsymmetricCipherKeyPair keyPair = generateSM2KeyPair();
        ECPrivateKeyParameters privateKey = (ECPrivateKeyParameters) keyPair.getPrivate();
        ECPublicKeyParameters publicKey = (ECPublicKeyParameters) keyPair.getPublic();

        // 明文
        String plainText = "Hello, SM2!";

        // 使用SM2公钥加密明文
        byte[] cipherText = SM2Encrypt(publicKey, plainText.getBytes());

        System.out.println("SM2 Cipher Text: " + Hex.toHexString(cipherText));
    }

    public static byte[] SM2Encrypt(ECPublicKeyParameters publicKey, byte[] plainText) throws InvalidCipherTextException {
        // 初始化SM2加密引擎
        SM2Engine engine = new SM2Engine();

        // 定义SM2加密参数
        CipherParameters params = new ParametersWithRandom(publicKey, new SecureRandom());

        // 初始化SM2加密引擎
        engine.init(true, params);

        // 使用SM2加密明文
        byte[] cipherText = engine.processBlock(plainText, 0, plainText.length);

        return cipherText;
    }
}

步骤4:SM2解密

现在我们已经使用SM2算法加密了明文,我们可以使用相同的密钥对进行解密。以下代码演示了如何使用SM2解密:

import org.bouncycastle.crypto.CipherParameters;
import org.bouncycastle.crypto.InvalidCipherTextException;
import org.bouncycastle.crypto.engines.SM2Engine;
import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
import org.bouncycastle.crypto.params.ECPublicKeyParameters;
import org.bouncycastle.crypto.params.ParametersWithRandom;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.util.encoders.Hex;
import java.security.Security;

public class SM2Util {

    public static void main(String[] args) throws InvalidCipherTextException {
        Security.addProvider(new BouncyCastleProvider());

        // 生成SM2密钥对
        AsymmetricCipherKeyPair keyPair = generateSM2KeyPair();
        ECPrivateKeyParameters privateKey = (ECPrivateKeyParameters) keyPair.getPrivate();
        ECPublicKeyParameters publicKey = (ECPublicKeyParameters) keyPair.getPublic();

        // 明文
        String plainText = "Hello, SM2!";

        // 使用SM2公钥加密明文
        byte[] cipherText = SM2Encrypt(publicKey, plainText.getBytes());

        // 使用SM2私钥解密密文
        byte[] decryptedText = SM2Decrypt(privateKey, cipherText);

        System.out.println("SM2 Decrypted Text: " + new String(decryptedText));
    }

    public static byte[] SM2Decrypt(ECPrivateKeyParameters privateKey, byte[] cipherText) throws InvalidCipherTextException {
        // 初始化SM2解密引擎
        SM2Engine engine = new SM2Engine();

        // 定义SM2解密参数
        CipherParameters params = new ParametersWithRandom(privateKey, new SecureRandom());

        // 初始化SM2解密引擎
        engine.init(false, params);

        // 使用SM2解密密文
        byte[] decryptedText = engine.processBlock(cipherText, 0, cipherText.length);

        return decryptedText;
    }
}

注意,这里使用了Bouncy Castle库提供的SM2加密引擎和SM2解密引擎进行加解密操作。请注意,在使用SM2加解密时,必须使用与密钥对相关联的公钥和私钥进行加解密。

这就是Java8 Spring Boot国密SM2加解密的完整实现和详细注释。希望这篇文章对您有所帮助

java8 springboot 国密sm2 加解密完整实现 完整详细注释 加教程

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