Question

假设我有一个DSA公钥，如下所示：

int countCounter = 0;
CountDownTimer mCountDownTimer = new CountDownTimer() {
    @Override
    public void onTick(long millisUntilFinished) {

    }

    @Override
    public void onFinish() {
        if (countCounter < 3){
            countCounter++;
            // cancel the counter and restart it!
            mCountDownTimer.cancel();
            mCountDownTimer.start();
        }
    }
};

我通过-----BEGIN PUBLIC KEY----- MIIBuDCCASwGByqGSM44BAEwggEfAoGBAOwYAcAzXpuw+XCXuNp5zhAzKdhrRguI uI5kLia8fhRb+1EnFPNpXt4fUS2c/0P0nvzH/TvApizzMkRYJea6rRSW5B+MDjv6 lvrxv+5xBM15kdug033mgSL7wEJIrTLwbe5/djz2oe+pr1KLqs/fvgyKcQyttUWb 5SmwZ+UVx3zfAhUAu0kA2L6VgbvEwpD9sTj5tLyB6Y0CgYEA5GjC+KsPsAH3HZKl 2IwTjX47iNVHyuzr4ZcyXceJ/pi3WR6bQJ6tpf1I2jIE0DOMPlNUwYh0aWBGvoY2 t4d5cwZaW90OS8IAIRFkQS0ywpmJyb7KXqRHwAYdMID88GW0d/KsVB3if0j/9QOo jhGOrO+kJcZBxUSxINgIIEYFAlEDgYUAAoGBALnHTAZlpoLJZuSBVtnMuRM3cSX4 3IkE9w9FveDV1jX5mmfK7yBVpQFV8eVJfk91ERQ4Dn6ePLUv2dRIt4a0S0qHqadg zyoFyqkmmUi1kNLyixtRqh+m2gXx0t63HEpZDbEPppdpnlppZquVQh7TyrKSXW9M TzUkQjFI9UY7kZeK -----END PUBLIC KEY-----

生成了此密钥

我希望能够在Java中加载此密钥，但我不清楚如何。

我用RSA做的是......我将base64解码为一个字节数组，然后将该字节数组传递给openssl dsa -in dsa_priv.pem -pubout -out dsa_pub.pem。此时，您可以将单个参数传递给org.bouncycastle.asn1.pkcs.RSAPrivateKey.getInstance()，然后从中执行密钥。

但是我如何使用DSA做到这一点？我可以说，附近没有java.security.spec.RSAPrivateKeySpec课程。这是我尝试导入时得到的错误：

org.bouncycastle.asn1.pkcs.RSAPrivateKey

有什么想法吗？

Answer 1

充气城堡图书馆包含一个PEM阅读器，可以将您的密钥解析为java.security.interfaces.DSAPublicKey：

PEMReader reader = new PEMReader(new FileReader("id_dsa.pub"));
DSAPublicKey publicKey = (DSAPublicKey) reader.readObject();
// What implementation are we dealing with?
System.out.println(publicKey.getClass());

实施类显然是org.bouncycastle.jce.provider.JDKDSAPublicKey

完整示例：

import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.openssl.PEMReader;

import java.io.StringReader;
import java.security.Security;
import java.security.interfaces.DSAPublicKey;

public class DSA {
    public static void main(String[] args) throws Exception {
        String key =
            "-----BEGIN PUBLIC KEY-----\n" +
            "MIIBuDCCASwGByqGSM44BAEwggEfAoGBAOwYAcAzXpuw+XCXuNp5zhAzKdhrRguI\n" +
            "uI5kLia8fhRb+1EnFPNpXt4fUS2c/0P0nvzH/TvApizzMkRYJea6rRSW5B+MDjv6\n" +
            "lvrxv+5xBM15kdug033mgSL7wEJIrTLwbe5/djz2oe+pr1KLqs/fvgyKcQyttUWb\n" +
            "5SmwZ+UVx3zfAhUAu0kA2L6VgbvEwpD9sTj5tLyB6Y0CgYEA5GjC+KsPsAH3HZKl\n" +
            "2IwTjX47iNVHyuzr4ZcyXceJ/pi3WR6bQJ6tpf1I2jIE0DOMPlNUwYh0aWBGvoY2\n" +
            "t4d5cwZaW90OS8IAIRFkQS0ywpmJyb7KXqRHwAYdMID88GW0d/KsVB3if0j/9QOo\n" +
            "jhGOrO+kJcZBxUSxINgIIEYFAlEDgYUAAoGBALnHTAZlpoLJZuSBVtnMuRM3cSX4\n" +
            "3IkE9w9FveDV1jX5mmfK7yBVpQFV8eVJfk91ERQ4Dn6ePLUv2dRIt4a0S0qHqadg\n" +
            "zyoFyqkmmUi1kNLyixtRqh+m2gXx0t63HEpZDbEPppdpnlppZquVQh7TyrKSXW9M\n" +
            "TzUkQjFI9UY7kZeK\n" +
            "-----END PUBLIC KEY-----";

        Security.addProvider(new BouncyCastleProvider());
        PEMReader reader = new PEMReader(new StringReader(key));
        DSAPublicKey decoded = (DSAPublicKey) reader.readObject();
        System.out.println(decoded.getClass());
    }
}

在Java中加载DSA公钥

1 个答案: