任何人都可以使用MSCAPI和ITEXT从usb令牌给我一个简单的pdf签名示例。我不想使用固定的ocsp字符串。
我试着遵循这个 Digital Signature book 但它没有用。我的代码是:
LoggerFactory.getInstance().setLogger(new SysoLogger());
BouncyCastleProvider providerBC = new BouncyCastleProvider();
Security.addProvider(providerBC);
SunMSCAPI provdierMSCAP = new SunMSCAPI();
Security.addProvider(provdierMSCAP);
KeyStore ks = KeyStore.getInstance("Windows-MY");
ks.load(null, null);
String alias = (String)ks.aliases().nextElement();
PrivateKey pk = (PrivateKey)ks.getKey(alias, null);
Certificate[] chain = ks.getCertificateChain(alias);
PdfReader pdfreader = new PdfReader("HelloWorld.pdf");
FileOutputStream outputFile = new FileOutputStream("Signed.pdf");
PdfStamper pdfstamper;
pdfstamper = PdfStamper.createSignature(pdfreader, outputFile, '\0', null, true);
PdfSignatureAppearance sap = pdfstamper.getSignatureAppearance();
sap.setCrypto(pk, chain, null, PdfSignatureAppearance.SELF_SIGNED);
sap.setReason("Test");
sap.setLocation("Dhaka");
sap.setVisibleSignature(new Rectangle(10, 10, 50, 30), 1, "Test");
pdfstamper.close();
JOptionPane.showMessageDialog(null, "Successfully Signed");
它给了我以下错误:
java.lang.NullPointerException
我尝试使用itext 5.2.1 / itextpdf-5.3.5和bcmail-jdk16-1.46,bcprov-jdk16-1.46.jar,bctsp-jdk16-1.46.jar。
有人可以帮忙吗?请................
答案 0 :(得分:0)
您将空值传递给load(),试试这个
ks.load(new FileInputStream("certificate_path"), keystore_password.toCharArray());
答案 1 :(得分:0)
删除sap.setCrypto行。你不需要它。
答案 2 :(得分:0)
在最新版本中,setCrypo替换为以下几行:
ExternalDigest digest = new BouncyCastleDigest();
BouncyCastleProvider provider = new BouncyCastleProvider();
ExternalSignature signature = new PrivateKeySignature(key, DigestAlgorithms.SHA256, provider.getName());
MakeSignature.signDetached(sap, digest, signature, chain, null, null, null, 0, CryptoStandard.CMS);
您必须将 bcprov-jdk15on-1.60.jar 和 bcpkix-jdk15on-1.60.jar 放入您的类路径中。