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VB.NET Examples

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(VB.NET) Write PKCS1 or PKCS8 Public Key PEM

Demonstrates how to write either PKCS1 or PKCS8 format PEM files. PKCS1 public keys have this PEM format:

-----BEGIN RSA PUBLIC KEY-----
BASE64 ENCODED DATA
-----END RSA PUBLIC KEY-----
PKCS8 public keys have this PEM format:
-----BEGIN PUBLIC KEY-----
BASE64 ENCODED DATA
-----END PUBLIC KEY-----

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'  Unlock the Chilkat API.
'  Starting in v9.5.0.49, all Chilkat classes can be unlocked at once at the beginning of a program
'  by calling UnlockBundle.  It requires a Bundle unlock code.
Dim chilkatGlob As New Chilkat.Global
Dim success As Boolean = chilkatGlob.UnlockBundle("Anything for 30-day trial.")
If (success <> True) Then
    Console.WriteLine(chilkatGlob.LastErrorText)
    Exit Sub
End If



Dim pem As New Chilkat.Pem

'  Load a public key from a PEM file.
'  (Assume the PEM contains at least one public key..)
success = pem.LoadPemFile("/Users/chilkat/testData/pem/myPublicKey.pem")
If (success <> True) Then
    Console.WriteLine(pem.LastErrorText)
    Exit Sub
End If


Dim i As Integer
Dim numPublicKeys As Integer = pem.NumPublicKeys
If (numPublicKeys = 0) Then
    Console.WriteLine((("Error: Expected the PEM to contain public keys.")))
    Exit Sub
End If


'  Get each public key as PEM, first in PKCS1 format, then in PKCS8.
For i = 1 To numPublicKeys

    '  First output to PKCS1 PEM format:
    Console.WriteLine("This is PKCS1 format:")
    pem.PublicKeyFormat = "pkcs1"
    Console.WriteLine(pem.ToPem())

    '  Now PKCS8 PEM format:
    Console.WriteLine("This is PKCS8 format:")
    pem.PublicKeyFormat = "pkcs8"
    Console.WriteLine(pem.ToPem())


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