Verify .p7s and Extract Original File

VB.NET example to verify and unpack the contents of a .p7s to restore the original file.

Download Chilkat .NET for 2.0 Framework

Download Chilkat .NET for 1.0 / 1.1 Framework

Dim crypt As New Chilkat.Crypt2()

'  Any string argument automatically begins the 30-day trial.
Dim success As Boolean
success = crypt.UnlockComponent("30-day trial")
If (success <> true) Then
    MsgBox("Crypt component unlock failed")
    Exit Sub
End If


'  Find our digital certificate from the Current User certificate store.
Dim ccs As New Chilkat.CreateCS()
Dim certStore As Chilkat.CertStore
certStore = ccs.OpenCurrentUserStore()
Dim cert As Chilkat.Cert
cert = certStore.FindCertBySubjectCN("Chilkat Software, Inc.")
If (cert Is Nothing ) Then
    MsgBox(cert.LastErrorText)

    Exit Sub
End If




'  Verify and restore the original file:
crypt.SetVerifyCert(cert)

success = crypt.VerifyP7S("license.p7s","license2.rtf")
If (success = false) Then
    MsgBox(crypt.LastErrorText)

    Exit Sub
End If




MsgBox("Success!")