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insert and verify digital signatures in pdf through c++,some one can help me?
Posted 26-Feb-12 16:37pm
johny10151981 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
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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
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
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Solution 2

'Verify certificate in pdf via

Dim theForm As Acrobat.CAcroPDDoc
Dim jso As Object

theForm = CreateObject("AcroExch.PDDoc")
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 " &
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)
CHill60 21-Jun-13 12:10pm
As per your other post, this one is also over a year old and the OP tagged it with C# not VB.

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