问

从密钥库中的文件读取公钥

溪边莎草发布于 2022-12-13 17:33

java

嗨,我想使用Java代码从KeyStore中提取公钥

我正在创建一个密钥库

keytool -genkey -alias mykeystore -keyalg RSA -keystore mykeystore.jks -keysize 2048

并将公众导出到另一个文件中

keytool -export -alias mykeystore -keystore mykeystore.jks -rfc -file publickey.cert

如何使用Java代码从keystore或publickey.cert文件获取公钥字符串？

谢谢.

UPDATE

public static void main(String[] args) {

    try {

        FileInputStream is = new FileInputStream("/home/myuser/my-keystore/mykeystore.jks");
        KeyStore keystore = KeyStore.getInstance(KeyStore.getDefaultType());
        String password = "myuserpass";
        char[] passwd = password.toCharArray();
        keystore.load(is, passwd);
        String alias = "mykeystore";
        Key key = keystore.getKey(alias, passwd);
        if (key instanceof PrivateKey) {
          // Get certificate of public key
          Certificate cert = keystore.getCertificate(alias);
          // Get public key
          PublicKey publicKey = cert.getPublicKey();

          String publicKeyString = Base64.encodeBase64String(publicKey
                    .getEncoded());
          System.out.println(publicKeyString);

        }

    } catch (Exception e) {
        e.printStackTrace();
    }
}

那就是给予喜欢

MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAiG2FjSuXrraYuh0TyRNiUvVCyaFlb7VY9AFIMSDdcY0JgNF0c4YVQxYxUCbYzmkLZD/rrYMe/8nxkWV0TMz2Y7GnvichjtWHL1ui58uC0+RtFMkYJ+ftwt9qBy9hvb/rVFTsvT5/b6CQXD8a6bFveMUluQZISLCV7i11XYzp81+w6M7+2fJAwezIJnIrgwv1K9YDjWaToaNXe7hnzzy0s8AdkjTk197+hg8dRfbvkr8XAddNsEMPeUA5iY+5VEpRNI925ZT/dxnaABA0z6i4JbVjeLl8r7ySG9R/2w/j2G+/YSRQc9BmRHPa0tBgH7wvQM+WRwD9WmST+5qeBIfH3QIDAQAB

当我这样做时cat publickey.cert,它表明了这一点

它们的键是不同的,即使长度也不同.为什么？

1 个回答

只需谷歌搜索您的问题就可以找到解决方案.

来自java2s.com的示例:

import java.io.FileInputStream;
import java.security.Key;
import java.security.KeyPair;
import java.security.KeyStore;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.cert.Certificate;

public class Main {
  public static void main(String[] argv) throws Exception {
    FileInputStream is = new FileInputStream("your.keystore");

    KeyStore keystore = KeyStore.getInstance(KeyStore.getDefaultType());
    keystore.load(is, "my-keystore-password".toCharArray());

    String alias = "myalias";

    Key key = keystore.getKey(alias, "password".toCharArray());
    if (key instanceof PrivateKey) {
      // Get certificate of public key
      Certificate cert = keystore.getCertificate(alias);

      // Get public key
      PublicKey publicKey = cert.getPublicKey();

      // Return a key pair
      new KeyPair(publicKey, (PrivateKey) key);
    }
  }
}

也可以看看:

http://www.java2s.com/Code/Java/Security/RetrievingaKeyPairfromaKeyStore.htm

如何从我们创建的密钥库中检索我的公钥和私钥

更新:

有关该问题的其他信息,请参阅注释.

2022-12-13 17:36 回答

路霄峰_121

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