Hi Alfonso,
I saw the problem with unrecognized OIDs for the different sets of EC
parameter before. Maybe it boils down to defining another OID
assignent. Could you please post a sample PDF with this type of signature?
Greetings,
Andreas
> Hi,
> I have a pdf file signed with Elliptic curve Digital Signature Algorithm
> (DSA) coupled with the Secure Hashing Algorithm (SHA256) algorithm (oid:
> 1.2.840.10045.4.3.2) .
>
> When I try and verify the signature with this code (iText 5.5.9):
>
> PdfPKCS7 pk = af.verifySignature(name, "BC");
>
> I get the following:
>
> no such algorithm: SHA256with1.2.840.10045.4.3.2 for provider BC
>
> Is it a wanted feature that itext does not support SHA256withECDSA?
>
> When I modify com.itextpdf.text.pdf.security.EncryptionAlgorithms class with:
>
> algorithmNames.put("1.2.840.10045.4.1", "ECDSA");
> algorithmNames.put("1.2.840.10045.4.3.2", "ECDSA");
> algorithmNames.put("1.2.840.10045.4.3.3", "ECDSA");
> algorithmNames.put("1.2.840.10045.4.3.4", "ECDSA");
>
> it seems to work.
>
> I wonder whether this solution is correct.
>
> Will iText support SHA256withECDSA in future?
>
> Best regards
>
> Alfonso
>
>
>
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--
Andreas Kühne
phone: +49 177 293 24 97
mailto: kue...@trustable.de
Trustable Ltd. Niederlassung Deutschland Gartenheimstr. 39C - 30659 Hannover
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What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic
patterns at an interface-level. Reveals which users, apps, and protocols are
consuming the most bandwidth. Provides multi-vendor support for NetFlow,
J-Flow, sFlow and other flows. Make informed decisions using capacity planning
reports.http://sdm.link/zohodev2dev
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iText(R) is a registered trademark of 1T3XT BVBA.
Many questions posted to this list can (and will) be answered with a reference
to the iText book: http://www.itextpdf.com/book/
Please check the keywords list before you ask for examples:
http://itextpdf.com/themes/keywords.php
