java sm2解密
时间: 2023-12-20 11:32:30 浏览: 32
对于Java中的SM2解密,可以使用Bouncy Castle库来实现。下面是一个示例代码:
```java
import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
import org.bouncycastle.crypto.CipherParameters;
import org.bouncycastle.crypto.engines.SM2Engine;
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.crypto.params.ParametersWithRandom;
import org.bouncycastle.crypto.util.PrivateKeyFactory;
import org.bouncycastle.crypto.util.PublicKeyFactory;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.util.encoders.Hex;
import java.security.Security;
public class SM2DecryptExample {
public static void main(String[] args) throws Exception {
Security.addProvider(new BouncyCastleProvider());
// 加载私钥
ECPrivateKeyParameters privateKey = (ECPrivateKeyParameters) PrivateKeyFactory.createKey(Hex.decode("私钥的十六进制表示"));
// 加载密文
byte[] ciphertext = Hex.decode("密文的十六进制表示");
// 创建SM2引擎
SM2Engine engine = new SM2Engine();
// 初始化为解密模式
engine.init(false, new ParametersWithRandom(privateKey));
// 解密
byte[] plaintext = engine.processBlock(ciphertext, 0, ciphertext.length);
// 输出明文
System.out.println("Plaintext: " + new String(plaintext));
}
}
```
请注意,上述代码中的钥和密文需要替换为实际的值。此外,还需要确保已经导入了Bouncy Castle库。