.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Register
 
Win Surprise Gifts!!!
Congratulations!!!


Post New Web Links

Digital Signatures: Application Guidelines on Digital Signature Practices for Common Criteria Securi

Posted By:      Posted Date: August 21, 2010    Points: 0   Category :ASP.Net
 

This article is an overview of digital signature practices and user considerations necessary to write applications in compliance with ISO/IEC 15408 Common Criteria security. Signing categories are described, including those that are a potential risk to the implied trust association that goes with a digital signature.

Jack Davis

MSDN Magazine November 2009




View Complete Post


More Related Resource Links

Digital Signatures Verification Error

  

Hey all;

 

Not 100% sure this is a sharepoint problem, but maybe someone can help.  I am installing a digital signature block that is being made available on a browser form.  The sig is working, but I can not get a valid signature on the form.  I am told there is a Digital Signatures Verification Error. 

 

Reading other posts tells me that I have to have my signature cert in the trusted Root authority of the sharepoint server.  Here is the rub..

 

When I use certificate manager, I s

SharePoint read/recognize a Digital Signature in Word (XML Content Control Mapping)?

  
I am using Content Control Mapping to pull certain fields from a Word Document and include it as columns when a document is uploaded into a Document Library. We're using MOSS 2007 and Word 2007. It is required that the user digitally signs the document before uploading.  Is there a way to get the signature to appear as a column in a similar fashion?  I'm new to this mapping business, and Google hasn't been much help. I realize I could use the Collect Signatures workflow, but that seems cumbersome to 1) have the user submit it, 2) have an admin open each document and start the workflow and 3) have the user THEN sign the document.  That's more steps than simply manually opening and verifying digital signatures. I figure I'm missing something obvious here.  Any help or ideas would be appreciated.

Can SharePoint read/recognize Digital Signatures?

  
I am using Content Control Mapping to pull certain fields from a Word Document and include it as columns when a document is uploaded into a Document Library. We're using MOSS 2007 and Word 2007. It is required that the user digitally signs the document before uploading.  Is there a way to get the signature to appear as a column in a similar fashion?  Alternately, even just showing that the document was signed would be nice.  I'm new to this mapping business, and Google hasn't been much help. I realize I could use the Collect Signatures workflow, but that seems cumbersome to 1) have the user submit it, 2) have an admin open each document and start the workflow and 3) have the user THEN sign the document.  That's more steps than simply manually opening and verifying digital signatures. I figure I'm missing something obvious here.  Any help or ideas would be appreciated.

Wierdenss with digital signatures.

  
http://blogs.msdn.com/b/raulga/archive/2006/10/30/using-a-digital-signature-as-a-secondary-identity-to-replace-cross-database-ownership-chaining.aspx Greetings. The object names used here reflect the article, though they were of course modified in my environment. So I just completed the above exercise customized for our environment. I skipped the step of creating the sproc in db_source, because it already existed. However, when I would get to this part: ADD SIGNATURE TO [schema_MyApp].[sp_MyApp01] BY CERTIFICATE [cert_MyAppSecIdentity] WITH SIGNATURE = 0x5EF9C30476A8E3E248E9E11B7563528EB02DA1D8F440CAA9141841B9F3101F1988760D2775000CD0D70F44A8672984E327FBF2676E7FAC9AAED8E6F383A98B2A569A407577917E671F3D632EF7326AD3770A32E05CF43A613D310D64B6D52FD978E57A73912BF3587C475E48F4AA58561A7E0DB5D9DB53D35E03EC281BEC7772 go I kept getting the message along the lines of "invalid public key". Of course I changed the sproc name and SIGNATURE according to my environment, so I don't know why there would be an issue? I only got around it when I dropped/ recreate the sproc in db_source, which kind of has me worried. Any ideas?  TIA, ChrisRDBA

apply digital signature from code

  

I have an infopath form that uses digital signatures. The current process for the user is to:

1. click the "click here to sign this section" link.

2. click "select image", and browse to their image

3. click ok.

I've been requested to shorten the above to one click. So, it should sign the section (with their image) without prompting the user with the digital signature dialog.

Any suggestions? Is this even possible? As the capability to digitally sign a doc without the user knowing would seem to violate the idea of digital signatures...

This is for the InfoPath 07 client (which may mean that this is not in the correct forum(?))

Thanks,

Mike


Digital Signature

  

I have problem to create digital signature. I created console application and it works there but when I want to run it at server there is exception. It looks like I have problem with reference to the file. Any idea please?


// Generate a signing key.
        RSACryptoServiceProvider Key = new RSACryptoServiceProvider();
        // Create a SignedXml object.
        SignedXml signedXml = new SignedXml();

Digital Signature under MOSS

  

I have asp.net page running under MOSS2007 and there is Access Denied error at signing (signedXml.ComputeSignature()). The code works as normal .net web application but it does not work under MOSS. 


Access is denied. 
   at System.Security.Cryptography.CryptographicException.ThrowCryptogaphicException(Int32 hr) 
   at System.Security.Cryptography.Utils._CreateCSP(CspParameters param, Boolean randomKeyContainer, SafeProvHandle& hProv) 
   at System.Security.Cryptography.Utils.CreateProvHandle(CspParameters parameters, Boolean randomKeyContainer) 
   at System.Security.Cryptography.Utils.GetKeyPairHelper(CspAlgorithmType keyType, CspParameters p

Digital Signature - Access Denied

  

I have asp.net page running under MOSS2007 and there is Access Denied error at signing (signedXml.ComputeSignature()). The code works as normal .net web application but it does not work under MOSS. Is there any security setting whitch does not allow MOSS to ready certificate? Thanks

 

Access is denied. 

   at System.Security.Cryptography.CryptographicException.ThrowCryptogaphicException(Int32 hr) 

   at System.Security.Cryptography.Utils._CreateCSP(CspParameters param, Boolean randomKeyContainer, SafeProvHandle& hProv) 

   at System.Security.Cryptography.Utils.CreateProvHandle(CspParameters parameters, Boolean randomKeyContainer) 

   at System.Security.Cryptography.Utils.GetKeyPairHelper(CspAlgorithmType keyType, CspParameters parameters, Boolean randomKeyContainer, Int32 dwKeySize, SafeProvHandle& safeProvHandle, SafeKeyHandle& safeKeyHandle) 

   at System.Security.Cryptography.RSACryptoServiceProvider.GetKeyPair() 

   at System.Security.Cryptography.RSACryptoServiceProvider.get_Publ

Approval Workflow and Digital Signatures

  

Environment = SharePoint MOSS 2007 Enterprise versio, and Office 2007 Professional/Enterprise

User = SharePoint Collection Admin, Full Control, other users signing and approving have Contribute permission

Settings on Out-of-the-Box (OOB) Approval WF are:  Start manually (no restrictions on manage list permission), Update Approval status on workflow completion, using the Worklfow Tasks list (created by default with the Publish feature enabled)

Documenent library requires content approval and both major and minor versioning are enabled.

Then, in a Word document,  digital signatures are inserted, and the Approval WF is started from within the Word client.  Here is what seems to be odd.  The document is required to be checked out (otherwise the sign operation is not allowed).  Upon checking the document out in order to sign it (no other modifications to the document), the minor version increases...normal behavor for checkout and checkin.  However, in signing a document, we would not want the minor version to change.  Also, the minor version increment is not necessarilly by one.  It might go from 0.1 to 0.3., 0.5., then 0.6 just with one person tasked to sign it and one check out one check in.

Question:  How is the OOB Approval workflow with digital signatures in say Word, really supp

Adding Digital Signatures to repeating sections

  

I'd like to know if there is someway to accomplish this without going into code behind.

I have tried to put a section into a repeating table but after applying a signature to it the ability to add a new section is lost. I am using a web enabled InfoPath 2007 form.

I selected Allow only one signature and lost the ability to add a new row. The button and text were gone from the reepeating table.

I selected All the signatures are independent (co-sign) and I wasn't able to add a new row to the repeating table. The text and button was there but when cliked got a message reading "This value has been digitally signed and cannot be changed"

I selected Each signature signs the preceding signature (counter-sign) and had the same effect as the co-sign option.

The app keeps making the controls read-only. I turn it off and it goes back to checked.

Any ideas on how to make this work? Or if it is possible?

Thanks,

 


Export .rdlc report to PDF with Security Options or Digital Signature

  

Hi!

I have a web app that uses .rdlc reports to create and export documents in PDF format. Everything works nice, but what i would like to do now is add some security options or digital signature to the PDF files.

How can i do this?


SharePoint 2010 Collect Signatures workflow - no digital signatures?

  

Hello, I configured a "Collect Signatures" workflow for the content type "Document", then uploaded a MS Word 2010 (.docx) document as content type "Document".  This Word document as 2 empty Signature Line in it.

I then start the workflow, basically 2-stage with 2 person from my Active Directory.  However, what I found is that when I go to my workflow task and click on the "This document requires your signature" link, it pops up a "Workflow Task" box in the browser.  There is a "Sign" button which I can click to sign but it does not sign on the signature lines inside my Word document.

What am I doing wrong here?  Or does SharePoint 2010 Collect Signatures workflow no longer work with digital sigantures?  Thanks.


Is there a limit in the number of digital signatures?

  

Is there a limit to the number of different digital signature lines/sections you can add to a form? They would like 8 different signature lines/sections  for various reasons and on the last few I can't seem to add any more. They all wind up using the same digital signature data to sign, if i change one they all change..

Thanks for any help...

Dan


Infopath browser form - Digital Signature resized in print view

  

Hi,

I have an Infopath browser based form that I have a digital sig on.  When the user signs it (Valid Signature - Signed by) the font size is small and is acceptable for use in the form.  Howvever, when I go to "Print View" it resizes to a larger font.  I do not want this as I am trying to fit the form to one page.  I altered the font in the signing section in the Print View in Infopath to no avail.  Looking at the Manifest file, I cannot locate the code where it determines the font size.  Anyone have any ideas?

Thanks,
Aaron


How to hide a digital signature in Infopath 2010 form

  

In Infopath 2010 I am using digital signature in section.

I am hiding that section but I cannot able hide digital signature.


leena

{ End Bracket }: The Digital Declaration of Independence

  

Bill Hill discusses his Digital Declaration of Independence.

Bill Hill

MSDN Magazine Launch 2008


Categories: 
ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend