how to insert and verify digital signatures in pdf through c++?

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insert and verify digital signatures in pdf through c++,some one can help me?

Posted 26-Feb-12 16:37pm

chp845

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Mohibur Rashid 27-Feb-12 2:24am

One you can buy a link libraries for that

or go to adobe website get the documentation for PDF and develop the required tools

2 solutions

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sobingt · Answer 1 · 2012-02-26T22:56:00

Solution 1

You can sign and verify data using CryptoAPI from Microsoft.
Microsoft has introduced CNG from Windows vista onwards. So evaluate your requirements.

Check out
http://msdn.microsoft.com/en-us/library/aa387761%28v=VS.85%29.aspx

Posted 26-Feb-12 22:56pm

sobingt

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chp845 27-Feb-12 21:28pm

i know t,quite some time ago,i have using the openssl and CryptoAPI to do a project.but i want to do it in pdf!

sobingt 28-Feb-12 6:23am

ok

tovares · Answer 2 · 2013-06-21T05:51:00

'Verify certificate in pdf via vb.net

Dim theForm As Acrobat.CAcroPDDoc
Dim jso As Object

theForm = CreateObject("AcroExch.PDDoc")
theForm.Open("C:\Temp\Maru\DeclaracionJurada.pdf")
jso = theForm.GetJSObject

'Verifica que la firma sea valida

Dim signatureOne = jso.getField("Signature2")
Dim oState = signatureOne.SignatureValidate()

Select Case oState
Case Is = -1
ListBox1.Items.Add("Estado : Sin Firma ")
Case Is = 0
ListBox1.Items.Add("Estado : Firma en blanco ")
Case Is = 1
ListBox1.Items.Add("Estado : No conoce el estado de la firma ")
Case Is = 2
ListBox1.Items.Add("Estado : Firma invalida ")
Case Is = 3
ListBox1.Items.Add("Estado : La firma es valida, pero la identidad del firmante no se pudo verificar ")
Case Is = 4
ListBox1.Items.Add("Estado : Firma e identidad son validas ")

End Select

'Extrae la info del firmante, nombre y fecha de la firma
Dim signatureInformation = signatureOne.signatureInfo

ListBox1.Items.Add("Firmante " & signatureInformation.name)
ListBox1.Items.Add("Fecha " & signatureInformation.Date)

'Extrae la info del certificado
Dim signatureCertificate = signatureInformation.certificates
ListBox1.Items.Add("Emitido a : " & signatureCertificate(0).subjectDN.serialNumber)
ListBox1.Items.Add("Numero de Serie : " & signatureCertificate(0).serialNumber)
ListBox1.Items.Add("Valido desde : " & signatureCertificate(0).validityStart)
ListBox1.Items.Add("Valido hasta : " & signatureCertificate(0).validityEnd)
ListBox1.Items.Add("Para : " & signatureCertificate(0).subjectDN.o)
ListBox1.Items.Add("Tipo : " & signatureCertificate(0).subjectDN.ou)
ListBox1.Items.Add("Emitido Por : " & signatureCertificate(0).issuerDN.cn)