Digital Signatures and PDF Documents c#

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C#

Dear All
Please provide the code of digital signature and pdf Documents

Thanks

Santosh Singh

Posted 22-Jan-12 22:05pm

santosh.s@drishtee.in

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chandrashekhar racharla · Answer 1 · 2012-01-22T22:10:00

Solution 1

Hi santosh,

This articles may help you
E-signing PDF documents with iTextSharp[^]
http://janewdaisy.wordpress.com/2011/06/20/how-to-add-pdf-digital-signature-with-c/[^]

Posted 22-Jan-12 22:10pm

chandrashekhar racharla

Updated 22-Jan-12 22:11pm

v2

uspatel · Answer 2 · 2012-01-22T22:10:00

Solution 2

try
Digital signing

Posted 22-Jan-12 22:10pm

uspatel

tovares · Answer 3 · 2013-06-21T05:52:00

'Verify digital certificate 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)