SM2加密解密 java实现
时间: 2023-09-22 13:13:12 浏览: 110
要在Java中实现SM2加密解密,您可以使用bcprov库。在使用之前,您需要确保已经导入了bcprov-ext-jdk15on-151.jar和bcprov-jdk15on-151.jar这两个包。
首先,您需要生成SM2的密钥对。可以使用以下代码生成密钥对:
```java
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.util.encoders.Hex;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.Security;
public class SM2Example {
public static void main(String[] args) throws Exception {
Security.addProvider(new BouncyCastleProvider());
KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("SM2", "BC");
KeyPair keyPair = keyPairGenerator.generateKeyPair();
byte[] publicKey = keyPair.getPublic().getEncoded();
byte[] privateKey = keyPair.getPrivate().getEncoded();
System.out.println("公钥: " + Hex.toHexString(publicKey));
System.out.println("私钥: " + Hex.toHexString(privateKey));
}
}
```
然后,您可以使用以下代码进行SM2加密和解密:
```java
import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.pkcs.PrivateKeyInfo;
import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo;
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.util.PrivateKeyInfoFactory;
import org.bouncycastle.crypto.util.SubjectPublicKeyInfoFactory;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.util.encoders.Hex;
import java.security.KeyFactory;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.Security;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
public class SM2Example {
public static void main(String[] args) throws Exception {
Security.addProvider(new BouncyCastleProvider());
// 加载公钥和私钥
byte[] publicKeyBytes = Hex.decode("公钥");
byte[] privateKeyBytes = Hex.decode("私钥");
KeyFactory keyFactory = KeyFactory.getInstance("SM2", "BC");
X509EncodedKeySpec publicKeySpec = new X509EncodedKeySpec(publicKeyBytes);
PublicKey publicKey = keyFactory.generatePublic(publicKeySpec);
PKCS8EncodedKeySpec privateKeySpec = new PKCS8EncodedKeySpec(privateKeyBytes);
PrivateKey privateKey = keyFactory.generatePrivate(privateKeySpec);
// 加密
SM2Engine engine = new SM2Engine();
engine.init(true, new ECPublicKeyParameters((ECPublicKey) publicKey, SM2Util.DOMAIN_PARAMETERS));
byte[] plaintext = "要加密的数据".getBytes();
byte[] encrypted = engine.processBlock(plaintext, 0, plaintext.length);
System.out.println("加密结果: " + Hex.toHexString(encrypted));
// 解密
engine.init(false, new ECPrivateKeyParameters((ECPrivateKey) privateKey, SM2Util.DOMAIN_PARAMETERS));
byte[] decrypted = engine.processBlock(encrypted, 0, encrypted.length);
System.out.println("解密结果: " + new String(decrypted));
}
}
```
请注意,这只是一个基础的示例,您可能需要根据您的具体需求进行修改和完善。另外,您还可以通过了解更多关于bcprov库的文档和示例来深入学习和使用SM2加密解密。<span class="em">1</span>
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