VB.NET

Export Digital Certificate's Public Key

See more Certificates Examples

The ExportPublicKey method can be called to get a certificate's public key. It can then be saved to any of a number of formats: (1) OpenSSL DER, (2) OpenSSL PEM, (3) RSA DER, (4) XML. VB.NET

Dim success As Boolean = False

Dim cert As New Chilkat.Cert

' LoadFromFile will load virtually any certificate format file.
' It will auto-recognize the format and load appropiately.
success = cert.LoadFromFile("/Users/chilkat/testData/cer/chilkat.cer")
If (success = False) Then
    Debug.WriteLine(cert.LastErrorText)
    Exit Sub
End If


' Get the public key:
Dim pubkey As New Chilkat.PublicKey
cert.GetPublicKey(pubkey)

' Save to various formats:
success = pubkey.SaveDerFile(False,"/Users/chilkat/testData/pubkeys/chilkat_pkcs8.der")
If (success <> True) Then
    Debug.WriteLine(pubkey.LastErrorText)
    Exit Sub
End If


success = pubkey.SavePemFile(False,"/Users/chilkat/testData/pubkeys/chilkat.pem")
If (success <> True) Then
    Debug.WriteLine(pubkey.LastErrorText)
    Exit Sub
End If


success = pubkey.SaveDerFile(True,"/Users/chilkat/testData/pubkeys/chilkat_pkcs1.der")
If (success <> True) Then
    Debug.WriteLine(pubkey.LastErrorText)
    Exit Sub
End If


success = pubkey.SaveXmlFile("/Users/chilkat/testData/pubkeys/chilkat.xml")
If (success <> True) Then
    Debug.WriteLine(pubkey.LastErrorText)
    Exit Sub
End If

Debug.WriteLine("Public key exported to all file formats.")