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您好我无法使用 C# itextsharp 5.4.0 库签署 PDF

以下是在 Java 代码中生成的运行良好的日志：

c.i.t.p.s.CrlClientOnline INFO  Checking certificate: CN=N C JAIN, SERIALNUMBER=2d9883a6f13cd6fb4416035766825e4b5ec823a871f883d3f3ee8eeb6e433c8d, ST=Delhi, OID.2.5.4.17=110020, OU="NEWGEN SOFTWARE TECHNOLOGIES LIMITED,ECID - 5810785", OID.2.5.4.20=f9cd01a6fbef84f253bf3830cab5caef7fc536e303639ff7e5c195f7488b032b, O=NEWGEN SOFTWARE TECHNOLOGIES LIMITED, C=IN
c.i.t.p.s.CrlClientOnline INFO  Added CRL url: _https://www.ncodesolutions.com/repository/ncodeca14.crl
c.i.t.p.s.CrlClientOnline INFO  Checking certificate: CN=(n)Code Solutions CA 2014, OID.2.5.4.51="301, GNFC Infotower", STREET="Bodakdev, S G Road, Ahmedabad", ST=Gujarat, OID.2.5.4.17=380054, OU=Certifying Authority, O=Gujarat Narmada Valley Fertilizers and Chemicals Limited, C=IN
c.i.t.p.s.CrlClientOnline INFO  Added CRL url: _http://cca.gov.in/rw/resources/CCAIndia2014Latest.crl
c.i.t.p.s.CrlClientOnline INFO  Checking certificate: CN=CCA India 2014, O=India PKI, C=IN
c.i.t.p.s.CrlClientOnline INFO  Skipped CRL url (malformed): null
c.i.t.p.s.MakeSignature INFO  Processing com.itextpdf.text.pdf.security.CrlClientOnline
c.i.t.p.s.CrlClientOnline INFO  Checking CRL: _https://www.ncodesolutions.com/repository/ncodeca14.crl
c.i.t.p.s.CrlClientOnline INFO  Skipped CRL: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target for _https://www.ncodesolutions.com/repository/ncodeca14.crl
c.i.t.p.s.CrlClientOnline INFO  Checking CRL: _http://cca.gov.in/rw/resources/CCAIndia2014Latest.crl
c.i.t.p.s.CrlClientOnline INFO  Added CRL found at: _http://cca.gov.in/rw/resources/CCAIndia2014Latest.crl

注意：java 代码工作正常。

但是 C# itextSharp 代码不起作用。它击中了不存在的错误 URL。

UrlList:
"_https://www.ncodesolutions.com/repository/ncodeca14.crl"
"_http://cca.gov.in/rw/resources/CCAIndia2014Latest.crl"

从给定的证书中检索 OCSP URL。

“ https://www.ncodesolutions.com/repository/ncodeca.cer ”

这与上述 urllist 和 java.util.url 中存在的 url 不同。

Exception:The remote server returned an error: (404) Not Found.

请提供相同的帮助或解决方案。

注意：_ 在每个链接之前添加，以便我可以发布我的问题。

谢谢

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