java 随机生成sm4密钥
时间: 2023-10-04 13:13:53 浏览: 138
下面是Java代码示例,可以用于随机生成SM4密钥:
```java
import org.bouncycastle.crypto.generators.SCrypt;
import org.bouncycastle.crypto.params.KeyParameter;
import org.bouncycastle.crypto.params.SCryptParameters;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.SecureRandom;
import java.security.Security;
public class SM4KeyGenerator {
public static void main(String[] args) throws NoSuchProviderException, NoSuchAlgorithmException {
Security.addProvider(new BouncyCastleProvider());
KeyGenerator keyGenerator = KeyGenerator.getInstance("SM4", "BC");
SecureRandom random = new SecureRandom();
byte[] salt = new byte[16];
random.nextBytes(salt);
SCryptParameters params = new SCryptParameters(16384, 8, 1, salt);
byte[] key = SCrypt.generate("password".getBytes(), salt, params);
keyGenerator.init(128, new SecureRandom(key));
SecretKey secretKey = keyGenerator.generateKey();
byte[] keyBytes = secretKey.getEncoded();
System.out.println("SM4 key: " + bytesToHexString(keyBytes));
}
private static String bytesToHexString(byte[] bytes) {
StringBuilder sb = new StringBuilder();
for (byte b : bytes) {
String hex = Integer.toHexString(b & 0xFF);
if (hex.length() < 2) {
sb.append(0);
}
sb.append(hex);
}
return sb.toString();
}
}
```
此代码使用BouncyCastle提供的SCrypt算法生成指定密码的密钥,然后使用SM4算法生成128位的随机密钥。请注意,此代码仅用于学习和测试目的。在实际应用中,请使用更安全的随机数生成器和更复杂的密码。