Xojo Plugin Requires Chilkat v11.0.0+

Convert RSA Private Key to Public Key

See more RSA Examples

Demonstrates how to get a public RSA key from a private RSA key. Xojo Plugin

Dim success As Boolean
success = False

Dim privKey As New Chilkat.PrivateKey

//  Step 1: Load the private key from a source.
//  (Chilkat can load private keys from all types of formats, and from in-memory bytes or encoded strings.
//  see the online reference documentation for more options.)
success = privKey.LoadPemFile("qa_data/pem/VP_Private.pem")
If (success = False) Then
    System.DebugLog(privKey.LastErrorText)
    Return
End If

//  Step 2: Get the public key object from the private key object.
Dim pubKey As New Chilkat.PublicKey
success = privKey.ToPublicKey(pubKey)

//  Step 3: Save the public key in a desired format. 
//  (Chilkat can load or save public and private keys in many different formats.  See
//  the online reference documentation for more options.)

//  Saves to a PKCS8 PEM file.
Dim bPreferPkcs1 As Boolean
bPreferPkcs1 = False
success = pubKey.SavePemFile(bPreferPkcs1,"qa_data/pem/VP_Public.pem")
If (pubKey.LastMethodSuccess = False) Then
    System.DebugLog(pubKey.LastErrorText)
    Return
End If

System.DebugLog("Extracted and saved public key from private key.")