我想使用 PKCS7 容器在 PDF 文件中创建分离签名。数据(哈希)预先在不同的设备上使用私钥进行签名。我想创建一个包含签名数据的 PKCS7 以及带有公钥的证书。如果不提供私钥并让图书馆签署数据,我似乎无法用充气城堡创建 PKCS7。这似乎不起作用:
InputStream inStream = new FileInputStream("1_public.pem");
BufferedInputStream bis = new BufferedInputStream( inStream );
CertificateFactory cf = CertificateFactory.getInstance("X.509");
List<Certificate> certList = new ArrayList<Certificate>();
Certificate certificate = cf.generateCertificate(bis);
certList.add(certificate);
Store certs = new JcaCertStore(certList);
CMSSignedDataGenerator gen = new CMSSignedDataGenerator();
gen.addCertificates( certs );
CMSProcessableInputStream msg = new CMSProcessableInputStream( new ByteArrayInputStream( "signedhash".getBytes() ) );
CMSSignedData signedData = gen.generate(msg, false);
byte[] pkcs7 = signedData.getEncoded() ) );
最佳答案
我设法通过提供一个不签名的 ContentSigner 来做到这一点,实际上非常简单:
InputStream inStream = new FileInputStream("1_public.pem");
BufferedInputStream bis = new BufferedInputStream( inStream );
CertificateFactory cf = CertificateFactory.getInstance("X.509");
List<Certificate> certList = new ArrayList<Certificate>();
Certificate certificate = cf.generateCertificate(bis);
certList.add(certificate);
Store certs = new JcaCertStore(certList);
CMSSignedDataGenerator gen = new CMSSignedDataGenerator();
gen.addCertificates( certs );
final byte[] signedHash = "signedhash".getBytes();
ContentSigner nonSigner = new ContentSigner() {
@Override
public byte[] getSignature() {
return signedHash;
}
@Override
public OutputStream getOutputStream() {
return new ByteArrayOutputStream();
}
@Override
public AlgorithmIdentifier getAlgorithmIdentifier() {
return new DefaultSignatureAlgorithmIdentifierFinder().find( "SHA256WithRSA" );
}
};
org.bouncycastle.asn1.x509.Certificate cert = org.bouncycastle.asn1.x509.Certificate.getInstance(ASN1Primitive.fromByteArray(certificate.getEncoded()));
JcaSignerInfoGeneratorBuilder sigb = new JcaSignerInfoGeneratorBuilder(new JcaDigestCalculatorProviderBuilder().build());
sigb.setDirectSignature( true );
gen.addSignerInfoGenerator(sigb.build(nonSigner, new X509CertificateHolder(cert)));
CMSProcessableInputStream msg = new CMSProcessableInputStream( new ByteArrayInputStream( "not used".getBytes() ) );
CMSSignedData signedData = gen.generate(msg, false);
byte[] pkcs7 = signedData.getEncoded();
关于java - 使用 bouncy caSTLe 使用预签名数据创建 PKCS7,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/39378249/