Bouncy Castle:与现有CA签署的证书 [英] Bouncy Castle: Signed Certificate with an existing CA
问题描述
我正在尝试创建一个证书(A),该证书针对存储在p12密钥库中的其他证书(B)进行了签名。此存储的证书(B)已添加到我的本地计算机的受信任证书存储中。
I'm trying to create a certificate (A) which is signed for other certificate (B) stored in a p12 keystore. This stored certificate (B) was added to the trusted certificate store of my local machine.
证书A用于使用充气城堡1.52库对pdf文档进行签名,但是我在签名文档中获得的数字签名无效。
Certificate A is used to sign a pdf document using bouncy castle 1.52 library, but the digital signature that I obtain in the signed document is invalid.
我将解释仅在有人可以帮助我的情况下完成的步骤。
I'm going to explain the steps done just if somebody can help me.
首先,我从p12密钥库创建CSR (B):
First, I create a CSR from the p12 keystore(B):
private static PKCS10CertificationRequest generateCSR() {
PKCS10CertificationRequest csr = null;
try {
initCACert();
PKCS10CertificationRequestBuilder p10Builder = new JcaPKCS10CertificationRequestBuilder(
new X500Principal("CN=Requested Test Certificate"), CAcert.getPublicKey());
JcaContentSignerBuilder csBuilder = new JcaContentSignerBuilder("SHA256withRSA");
ContentSigner signer = csBuilder.build(CApk);
csr = p10Builder.build(signer);
} catch (Exception e) {
log.error(e);
}
return csr;
}
然后,使用此CSR生成了证书(A)。
Then, a certificate was generated (A) with this CSR.
private static Certificate signCSR() throws Exception {
PKCS10CertificationRequest csr = generateCSR();
AlgorithmIdentifier sigAlgId = new DefaultSignatureAlgorithmIdentifierFinder().find("SHA256withRSA");
AlgorithmIdentifier digAlgId = new DefaultDigestAlgorithmIdentifierFinder().find(sigAlgId);
X500Name issuer = X500Name.getInstance(CAcert.getSubjectX500Principal().getEncoded());
BigInteger serial = new BigInteger(32, new SecureRandom());
Calendar c = Calendar.getInstance();
c.add(Calendar.SECOND, -1);
Date from = c.getTime();
c.add(Calendar.YEAR, 5);
Date to = c.getTime();
X509v1CertificateBuilder certBuilder = new X509v1CertificateBuilder(issuer, serial, from, to, csr.getSubject(),
csr.getSubjectPublicKeyInfo());
ContentSigner signer = new BcRSAContentSignerBuilder(sigAlgId, digAlgId)
.build(PrivateKeyFactory.createKey(CApk.getEncoded()));
X509CertificateHolder holder = certBuilder.build(signer);
CertificateFactory certFactory = CertificateFactory.getInstance("X.509");
InputStream in = new ByteArrayInputStream(holder.getEncoded());
Certificate cert = certFactory.generateCertificate(in);
return cert;
}
最后,我使用生成的证书(A)对我的pdf签名。 / p>
Finally, I use this generated certificate (A) to sign my pdf.
Certificate cert = signCSR();
SignerInfoGeneratorBuilder signerInfoBuilder = new SignerInfoGeneratorBuilder(
new JcaDigestCalculatorProviderBuilder().setProvider("BC").build()
);
signerInfoBuilder.setSignedAttributeGenerator( signedAttributeGenerator );
JcaContentSignerBuilder contentSignerBuilder = new JcaContentSignerBuilder( "SHA1WITHRSA" );
contentSignerBuilder.setProvider("BC");
X509CertificateHolder certificateHolder = new X509CertificateHolder( cert.getEncoded( ) );
generator.addSignerInfoGenerator(
signerInfoBuilder.build( contentSignerBuilder.build( CApk ),
certificateHolder )
);
ArrayList<X509CertificateHolder> signingChainHolder = new ArrayList<X509CertificateHolder>( );
certificateHolder = new X509CertificateHolder( cert.getEncoded() );
certificateHolder = new X509CertificateHolder( CAcert.getEncoded() );
signingChainHolder.add( certificateHolder );
Store certs = new JcaCertStore( signingChainHolder );
generator.addCertificates( certs );
CMSTypedData content = new CMSProcessableByteArray(datos);
CMSSignedData signedData = generator.generate( content, true );
ByteArrayOutputStream baos = new ByteArrayOutputStream();
new DEROutputStream(baos).writeObject(signedData.toASN1Structure());
result = baos.toByteArray();
所有过程显然都正确执行,但是当我打开pdf时,签名无效:
All the process is executed apparently right, but when I open the pdf the signature is invalid:
编辑:我做了一个导出生成的证书。这是获得的结果。
I have made an export of the generated certificate. This is the result obtained.
< img src = https://i.stack.imgur.com/RV3bb.png alt =在此处输入图片描述>
我会感谢任何可以帮助我解决此问题的评论或信息。
I will appreciate any comment or information that can help me to fix this.
预先感谢。
推荐答案
我已经发现了问题:我正在按照相反的顺序构建证书链。
I have identified the problem: I was building the certificate chain in the opposite order that should be.
我有以下顺序:
certificateHolder = new X509CertificateHolder( cert.getEncoded() );
certificateHolder = new X509CertificateHolder( CAcert.getEncoded() );
正确的顺序是:
certificateHolder = new X509CertificateHolder( CAcert.getEncoded() );
certificateHolder = new X509CertificateHolder( cert.getEncoded() );
我希望有人可以找到有用的信息!
I hope somebody can find this information useful!
这篇关于Bouncy Castle:与现有CA签署的证书的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!