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时间戳响应不正确-BouncyCastle

rfc3161 trusted-timestamp bouncycastle security java

willcodejavaforfood · 技术社区 · 17 年前

尝试使用BouncyCastle并连接到请求时间戳(RFC 3161) http://timestamping.edelweb.fr/service/tsp

public static void main(String[] args) {
    String ocspUrl = "http://timestamping.edelweb.fr/service/tsp";
    byte[] digest = "hello".getBytes();
    OutputStream out = null;

    try {
        TimeStampRequestGenerator reqgen = new TimeStampRequestGenerator();
        TimeStampRequest req = reqgen.generate(TSPAlgorithms.SHA1, digest);
        byte request[] = req.getEncoded();

        URL url = new URL(ocspUrl);
        HttpURLConnection con = (HttpURLConnection) url.openConnection();

        con.setDoOutput(true);
        con.setDoInput(true);
        con.setRequestMethod("POST");
        con.setRequestProperty("Content-type", "application/timestamp-query");

        con.setRequestProperty("Content-length", String.valueOf(request.length));
        out = con.getOutputStream();
        out.write(request);
        out.flush();

        if (con.getResponseCode() != HttpURLConnection.HTTP_OK) {
            throw new IOException("Received HTTP error: " + con.getResponseCode() + " - " + con.getResponseMessage());
        }
        InputStream in = con.getInputStream();
        TimeStampResp resp = TimeStampResp.getInstance(new ASN1InputStream(in).readObject());
        TimeStampResponse response = new TimeStampResponse(resp);
        response.validate(req);
        System.out.println(response.getTimeStampToken().getTimeStampInfo().getGenTime());
    } catch (IOException e) {
        e.printStackTrace();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

问题如下: 有没有人使用Bouncycastle的时间戳库,碰巧知道不同的状态代码及其含义?或者只是一般来说,为什么这似乎行不通。

我希望看到日期的这一行只抛出了一个NullPointer:

System.out.println(response.getTimeStampToken().getTimeStampInfo().getGenTime());

如果你想运行代码,你需要bouncycastle罐子,可以从以下网址下载 here 。您需要:供应商、邮件、tsp。

3 回复 | 直到 15 年前

endre 15 年前

分析与wireshark的通信,这个例子给了我一个“坏消息摘要”错误。对我有效的摘要代码是:

    MessageDigest messageDigest = MessageDigest.getInstance("SHA-1");
    messageDigest.update("messageImprint".getBytes());
    byte[] digest = messageDigest.digest();

willcodejavaforfood 17 年前

问题似乎是内容的格式/长度错误。

TimeStampRequest req = reqgen.generate(TSPAlgorithms.SHA1, digest);

"hello".getBytes();

static public byte[] calculateMessageDigest()
        throws NoSuchAlgorithmException, IOException {
    SHA1Digest md = new SHA1Digest();

    byte[] dataBytes = "helloooooooooooooo".getBytes();
    int nread = dataBytes.length;
    md.update(dataBytes, 0, nread);
    byte[] result = new byte[32];
    md.doFinal(result, 0);
    return result;

Digistamp

willcodejavaforfood 17 年前

this