对于IText 5,添加数字签名非常容易。
其文档的链接是:
http://developers.itextpdf.com/examples/security/digital-signatures-white-paper/digital-signatures-chapter-2
有人可以在ITEXT 7中共享指向文档的链接吗?
我尝试了各种方法都无济于事。找不到在线任何链接。我可以取消签名并检查签名,但是无法添加。
最佳答案
可以在iText 7 Java signature samples github repository测试源软件包com.itextpdf.samples.signatures中找到到iText 7的Digital Signatures Whitepaper代码示例的端口,例如。简单的C2_01_SignHelloWorld示例的摘录:
public void sign(String src, String dest,
Certificate[] chain,
PrivateKey pk, String digestAlgorithm, String provider,
PdfSigner.CryptoStandard subfilter,
String reason, String location)
throws GeneralSecurityException, IOException {
// Creating the reader and the signer
PdfReader reader = new PdfReader(src);
PdfSigner signer = new PdfSigner(reader, new FileOutputStream(dest), false);
// Creating the appearance
PdfSignatureAppearance appearance = signer.getSignatureAppearance()
.setReason(reason)
.setLocation(location)
.setReuseAppearance(false);
Rectangle rect = new Rectangle(36, 648, 200, 100);
appearance
.setPageRect(rect)
.setPageNumber(1);
signer.setFieldName("sig");
// Creating the signature
IExternalSignature pks = new PrivateKeySignature(pk, digestAlgorithm, provider);
IExternalDigest digest = new BouncyCastleDigest();
signer.signDetached(digest, pks, chain, null, null, null, 0, subfilter);
}