Java中的充气城堡签名文件 [英] sign file with bouncy castle in java

问题描述

我想在Java中使用证书对文件内容进行签名。

I want to sign a file content with certificate in java.

使用终端和openssl，我可以这样做：

With terminal and openssl, I can do this :

openssl smime -sign -in nosign.mobileconfig -out signed.mobileconfig -signer server.crt -inkey server.key -certfile cacert.crt -outform der -nodetach

server.crt和.key是要签名的文件，我想我知道cacert.crt是嵌入式的

server.crt and .key are the files to sign, and I think I understand the cacert.crt is embedded inside the out content.

最后，我已经签名并信任了文件。

finally, I have a file signed and trusted.

在Java中，我可以不要使用openssl（不想启动openssl命令），因此，我必须使用lib对其进行签名。

In Java, I can't use openssl (don't want to launch openssl command) so, I have to sign it with a lib.

为此，我要使用Bouncy Castle（版本1.53）

To do that, I use Bouncy Castle (version 1.53)

这是我的代码：

    byte[] profile = ...; // I can have it also in String

    // the certificate in -certfile
    FileInputStream inputStream = new FileInputStream("src/main/resources/cacert.crt"); 

    byte[] caCertificate = ByteStreams.toByteArray(inputStream);

    // the certificate to sign : server.crt, embedded in p12
    X509Certificate serverCertificate = (X509Certificate) this.keyStore.getCertificate("1");

    // Private key is the server.key
    ContentSigner sha1Signer = new JcaContentSignerBuilder("SHA1withRSA").setProvider("BC").build(this.privateKey);

    CMSSignedDataGenerator generator = new CMSSignedDataGenerator();
    generator.addSignerInfoGenerator(new JcaSignerInfoGeneratorBuilder(
            new JcaDigestCalculatorProviderBuilder().setProvider("BC").build()).build(sha1Signer, serverCertificate));

    // the embedded certificate : cacert.crt, but  I don't know if it is good to do that this way
    X509CertificateHolder holder = new X509CertificateHolder(caCertificate);

    generator.addCertificate(holder);

    CMSProcessableByteArray bytes = new CMSProcessableByteArray(profile);
    CMSSignedData signedData = generator.generate(bytes, true);

    System.out.println("signedData : \n" + signedData.getEncoded());

请问您能帮我获得好的签名数据吗？谢谢！

Can you help me to have the good signed data please ? Thanks !

编辑：
我遇到了一个错误

EDIT : I've got an error at

    X509CertificateHolder holder = new X509CertificateHolder(caCertificate);

java.io.IOException：遇到未知标签13

推荐答案

CA证书文件显然为 PEM （ASCII）格式。 X509CertificateHolder的构造函数需要证书的 BER / DER （二进制）编码。

The CA certificate file is obviously in PEM (ASCII) format. The constructor for X509CertificateHolder needs the BER/DER (binary) encoding of the certificate.

您可以通过添加以下内容进行转换：

You can convert it by adding this:

PEMParser pemParser = new PEMParser(new FileReader("src/main/resources/cacert.crt"));
X509CertificateHolder caCertificate = (X509CertificateHolder) pemParser.readObject();

您还应将签名证书添加到CMS结构中：

You should add the signing certificate to the CMS structure as well:

generator.addCertificate(new X509CertificateHolder(serverCertificate.getEncoded()));

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