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如何使用BouncyCastle在Java中通过PEMParser读取不带BEGIN和END的PEM证书

  •  0
  • Alireza Mohamadi  · 技术社区  · 9 年前

    我有一个 cert.PEM 我以这种方式创建的文件:

    Base64 encoder = new Base64();
    File file = new File(certPath + "cert.pem");
    file.createNewFile();
    writer = new FileWriter(file);
    writer.write(new String(encoder.encode(cert.getEncoded())));
    writer.close();
    

    它没有 ----BEGIN CERTIFICATE---- -----END CERTIFICATE----- 部分。它的原始形式如下:

    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
    

    现在我想再次读取它并将其解析为 X509CertificateHolder 按此代码:

    PEMParser r = new PEMParser(new FileReader(certFile));
                System.out.println(r.ready());
                PemObject object = r.readPemObject();
                X509CertificateHolder cert = new X509CertificateHolder(object.getContent());
                Date date = new Date();
                if (date.compareTo(cert.getNotAfter()) > 0)
                {
                    generateCert();
                }
    

    我明白了:

    java.lang.NullPointerException
        at com.sunova.bot.Launcher.<init>(Launcher.java:67)
        at com.sunova.bot.Launcher.getInstance(Launcher.java:41)
        at com.sunova.bot.Launcher.main(Launcher.java:48)
    

    这是由于 r.readPemObject() 返回null。我该怎么办?

    1 回复  |  直到 9 年前
        1
  •  0
  •   Community CDub    3 年前

    PEM格式包括BEGIN CERTIFICATE和END CERTIFATE标题。看见 https://www.rfc-editor.org/rfc/rfc7468#page-11 。所以应该将它们添加到.pem文件中。之后,PEMParser将正常工作

    如果无法做到这一点,请在向PEMParser提供内容之前动态添加标题