Visual Basic 6.0
Visual Basic 6.0
Load a Public Key from Base64 DER
Demonstrates the Chilkat PublicKey.LoadBase64 method, which loads a public key from standard Base64-encoded DER. The only argument is the Base64 string; whitespace within it is permitted.
Background: A public key in DER (binary) form is often carried as Base64 text so it can travel through channels that expect a string — a config value, a JSON field, a certificate export. This loader decodes that text and inspects the DER to determine the key type and structure automatically. It is the plain-Base64 counterpart to loading a full PEM block, which additionally has the
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Dim success As Long
success = 0
' Demonstrates the PublicKey.LoadBase64 method, which loads a public key from standard
' Base64-encoded DER. The only argument is the Base64 string (whitespace is allowed).
Dim pubKey As New PublicKey
' The Base64 of the DER-encoded public key.
Dim keyStr As String
keyStr = "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA...IDAQAB"
success = pubKey.LoadBase64(keyStr)
If (success = 0) Then
Debug.Print pubKey.LastErrorText
Exit Sub
End If
Debug.Print "Loaded a " & pubKey.KeyType & " public key."