http://www.quickpdf.org/forum/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Tue, 14 Jul 2026 13:02:57 +0000 Sat, 04 Dec 2021 00:01:13 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 11.01 360 www.quickpdf.org/forum/RSS_post_feed.asp?TID=3958 http://www.quickpdf.org/forum/forum_images/QPDF_Forum_Title.png http://www.quickpdf.org/forum/ http://www.quickpdf.org/forum/signature-error_topic3958_post15949.html#15949 Author: TBrady12
Subject: 3958
Posted: 04 Dec 21 at 12:01AM


Hi Ingo, thank you for your response.

Yes, it worked on one Win-10 System, but not on the other Win-10 System.
 
PFX data is in PKCS12 format.
DPLSetSignProcessSubFilter only supports pkcs7 subfilter.

Here is the code we use.

// This function is a substitution of DPLSignFile function, as it lacks the ability to specify the hashing algorithm,
// DPLSetSignProcessSubFilter is doing the job in this function.

   int procID = DPLNewSignProcessFromFile(instanceID, inputFileName, openPassword);

   int rc = DPLSetSignProcessField(instanceID, procID, signatureFieldName);
   if (rc != DPL_SUCCESS) {
      return rc;
   }
   rc = DPLSetSignProcessInfo(instanceID, procID, reason, location , contactInfo);
   if (rc != DPL_SUCCESS) {
      return rc;
   }
   rc = DPLSetSignProcessSubFilter(instanceID, procID, 5 /*adbe_pkcs7_detached_with_sha512*/);
   if (rc != DPL_SUCCESS) {
      return rc;
   }
   rc = DPLSetSignProcessPFXFromString(instanceID, procID, pfxBuffer, pfxPassword);
   if (rc != DPL_SUCCESS) {
      return rc;
   }
   DPLEndSignProcessToFile(instanceID, procID, outputFileName);
   rc = DPLGetSignProcessResult(instanceID, procID);
   if (rc != DPL_SUCCESS) {
      return rc;
   }
   return rc;

]]> Sat, 04 Dec 2021 00:01:13 +0000 http://www.quickpdf.org/forum/signature-error_topic3958_post15949.html#15949 http://www.quickpdf.org/forum/signature-error_topic3958_post15942.html#15942 Author: Ingo
Subject: 3958
Posted: 01 Dec 21 at 8:08PM

Hi Tony,

only on one win10-system and on other win10-systems it works?
Can we take a look into the relevant code part you're using?
Here you can look into a sample about how to do it:
https://www.debenu.com/kb/advanced-options-signing-pdf-files/

Here's the description of the function and there you can read that pkcs12 is necessary - you wanna try it with pkcs7:
https://www.debenu.com/docs/pdf_library_reference/SignFile.php

Cheers and welcome here,
Ingo


]]> Wed, 01 Dec 2021 20:08:24 +0000 http://www.quickpdf.org/forum/signature-error_topic3958_post15942.html#15942 http://www.quickpdf.org/forum/signature-error_topic3958_post15939.html#15939 Author: TBrady12
Subject: 3958
Posted: 30 Nov 21 at 1:51AM

Iuse DPLNewSignProcessFromFileand other functions rather than DPLSignFile,
and those functions work fine, but it worked weird with one Windows10 environment.
The resulting PDF file contains only '0' as signature, yet still no error
from DPL functions with this case.
Acrobat Reader says, of course, that the signature is invalid.
Does anybody know what's going on or see similar result? Any advice?


/Filter /Adobe.PPKLite
/SubFilter /adbe.pkcs7.detached
/Contents <0000000000000000000000000000000000000000 ....
/ByteRange [ 0 13275227 13275741 704
]
/M (D:20211118154446-05'00')
]]> Tue, 30 Nov 2021 01:51:27 +0000 http://www.quickpdf.org/forum/signature-error_topic3958_post15939.html#15939