BouncyCastle属性messageDigest验证失败

问题描述 投票:0回答:1

我使用Bouncy Castle 1.59签署/验证CADES签名时遇到问题。我必须添加messageDigest属性,但是当我添加它时,我的程序失败了。

这是我的代码:

Signature signature = Signature.getInstance("SHA256withRSA", new BouncyCastleProvider());
byte[] test_data = "test".getBytes();
MessageDigest dig = MessageDigest.getInstance("SHA256", new BouncyCastleProvider());
byte[] digest = dig.digest(test_data);

byte[] privateKeyContent = archivePrivateKey.getBytes();
BufferedReader br = new BufferedReader(new InputStreamReader(new ByteArrayInputStream(privateKeyContent)));
Security.addProvider(new BouncyCastleProvider());
PEMParser pp = new PEMParser(br);
PEMKeyPair pemKeyPair = (PEMKeyPair) pp.readObject();
KeyPair kp = new JcaPEMKeyConverter().getKeyPair(pemKeyPair);
pp.close();

signature.initSign(kp.getPrivate());
signature.update(test_data);

byte[] certContent = archiveCertificateContent.getBytes();
PemFile pemFile = new PemFile(certContent);
X509CertificateHolder cert = new X509CertificateHolder(pemFile.getPemObject().getContent());
X509Certificate certificate = new JcaX509CertificateConverter().getCertificate(cert);

// Build CMS
List certList = new ArrayList();
CMSTypedData data = new CMSProcessableByteArray(signature.sign());
certList.add(certificate);
Store certs = new JcaCertStore(certList);


byte[] certHash = dig.digest(certificate.getEncoded());
AlgorithmIdentifier algId = new AlgorithmIdentifier(NISTObjectIdentifiers.id_sha256);
ESSCertIDv2 essCert = new ESSCertIDv2(algId, certHash);
SigningCertificateV2 scv2 = new SigningCertificateV2(new ESSCertIDv2[] { essCert });

ASN1EncodableVector signedAttributes = new ASN1EncodableVector();
signedAttributes.add(new Attribute(PKCSObjectIdentifiers.id_aa_signingCertificateV2, new DERSet(scv2)));
//signedAttributes.add(new Attribute(CMSAttributes.messageDigest, new DERSet(new DEROctetString(digest))));
signedAttributes.add(new Attribute(CMSAttributes.contentType, new DERSet(PKCSObjectIdentifiers.data)));

AttributeTable signedAttributesTable = new AttributeTable(signedAttributes);
signedAttributesTable.toASN1EncodableVector();

CMSSignedDataGenerator gen = new CMSSignedDataGenerator();
JcaContentSignerBuilder contentSigner = new JcaContentSignerBuilder("SHA256withRSA");
contentSigner.setProvider(BC_PROVIDER);
SignerInfoGeneratorBuilder signerInfoBuilder = new SignerInfoGeneratorBuilder(new JcaDigestCalculatorProviderBuilder().setProvider(BC_PROVIDER).build());
signerInfoBuilder.setSignedAttributeGenerator(new DefaultSignedAttributeTableGenerator(signedAttributesTable));

gen.addSignerInfoGenerator(signerInfoBuilder.build(contentSigner.build(kp.getPrivate()), cert));
gen.addCertificates(certs);
CMSSignedData signedData = gen.generate(data, true);

// Verify signature
Store store = signedData.getCertificates();
SignerInformationStore signers = signedData.getSignerInfos();
Collection c = signers.getSigners();
Iterator it = c.iterator();
while (it.hasNext()) {
  SignerInformation signer = (SignerInformation) it.next();
  Collection certCollection = store.getMatches(signer.getSID());
  Iterator certIt = certCollection.iterator();
  X509CertificateHolder certHolder = (X509CertificateHolder) certIt.next();
  X509Certificate certFromSignedData = new JcaX509CertificateConverter().setProvider(BC_PROVIDER).getCertificate(certHolder);
  if (signer.verify(new JcaSimpleSignerInfoVerifierBuilder().setProvider(BC_PROVIDER).build(certFromSignedData))) {
    System.out.println("Signature verified");
  } else {
    System.out.println("Signature verification failed");
  }
}

当我取消注释第35行:signedAttributes.add(new Attribute(CMSAttributes.messageDigest, new DERSet(new DEROctetString(digest))));然后我得到错误:

org.bouncycastle.cms.CMSSignerDigestMismatchException:消息摘要属性值与计算值不匹配

我正在尝试很多选项,配置但问题仍然存在。任何帮助都将非常有用。谢谢

java bouncycastle
1个回答
1
投票

我自己没有尝试过你的代码,但我认为问题在于你正在添加的消息摘要,因为MessageDigest属性不是你真正放在SignedData中的。我看到你首先使用JCA签署数据。

Signature signature = Signature.getInstance("SHA256withRSA", new BouncyCastleProvider());
byte[] test_data = "test".getBytes();
    signature.initSign(kp.getPrivate());
signature.update(test_data);
CMSTypedData data = new CMSProcessableByteArray(signature.sign());
...
CMSSignedData signedData = gen.generate(data, true);

在这里,您要使用签名(而不是数据,这很奇怪)来生成CMSSignedData。因此对于contentSigner,您的签名是要签名的实际数据。但是,在MessageDigest属性中,您将放置实际数据的摘要。这很可能是导致问题的原因。

现在来到更重要的问题。为什么首先使用上面的代码签署数据?这对我来说似乎不对,可能不是你想要的。如果您的目的是为“测试”数据生成CMS signedData,则应直接在signedDataGenerator中使用它,这将负责签名部分。

如果您还没有这样做,请通过RFC

希望这可以帮助。

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