用java详细实现读取jks文件然后转换成jwks文件
时间: 2024-03-16 14:46:24 浏览: 13
首先,需要使用Java中的KeyStore类来读取JKS文件。然后,需要使用Java中的Bouncy Castle库来转换JKS文件为JWKS文件。
以下是一个示例代码,用于读取JKS文件并将其转换为JWKS文件:
```java
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.security.KeyStore;
import java.security.Security;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.jce.provider.JCERSAPublicKey;
import org.bouncycastle.jce.provider.JDKKeyFactory;
public class JKSConverter {
public static void main(String[] args) throws Exception {
// Add Bouncy Castle as a security provider
Security.addProvider(new BouncyCastleProvider());
// Load the JKS file
FileInputStream jksFile = new FileInputStream("path/to/your.jks");
KeyStore keyStore = KeyStore.getInstance("JKS");
keyStore.load(jksFile, "password".toCharArray());
// Convert the JKS file to JWKS file
FileOutputStream jwksFile = new FileOutputStream("path/to/your.jwks");
StringBuilder jwksBuilder = new StringBuilder();
jwksBuilder.append("{\n");
jwksBuilder.append(" \"keys\": [\n");
for (String alias : keyStore.aliases()) {
if (keyStore.isKeyEntry(alias)) {
JCERSAPublicKey publicKey = (JCERSAPublicKey) keyStore.getCertificate(alias).getPublicKey();
String encodedKey = Base64.getEncoder().encodeToString(publicKey.getEncoded());
jwksBuilder.append(" {\n");
jwksBuilder.append(" \"kty\": \"RSA\",\n");
jwksBuilder.append(" \"alg\": \"RS256\",\n");
jwksBuilder.append(" \"use\": \"sig\",\n");
jwksBuilder.append(" \"kid\": \"" + alias + "\",\n");
jwksBuilder.append(" \"n\": \"" + Base64.getUrlEncoder().withoutPadding().encodeToString(publicKey.getModulus().toByteArray()) + "\",\n");
jwksBuilder.append(" \"e\": \"" + Base64.getUrlEncoder().withoutPadding().encodeToString(publicKey.getPublicExponent().toByteArray()) + "\"\n");
jwksBuilder.append(" },\n");
}
}
// Remove the last comma
jwksBuilder.deleteCharAt(jwksBuilder.length() - 2);
jwksBuilder.append(" ]\n");
jwksBuilder.append("}\n");
// Write the JWKS file
jwksFile.write(jwksBuilder.toString().getBytes());
jwksFile.flush();
jwksFile.close();
}
}
```
在上面的示例代码中,我们首先添加了Bouncy Castle作为安全提供程序,然后使用KeyStore类从JKS文件中读取密钥和证书。接下来,我们使用Bouncy Castle库将公钥转换为JWKS格式,并将其写入文件中。最后,我们将JWKS文件保存到指定的路径中。
需要注意的是,如果您的JKS文件中包含多个密钥和证书,请在生成JWKS文件时将它们都转换。