(Visual Basic 6.0) RSASSA-PSS Algorithm with SHA256 Hashing

RSA encrypt a SHA256 hash with OAEP padding.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

' This example requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

Dim privkey As New PrivateKey

' Load the private key object from a PEM file.
' (To load from a PEM string, call LoadPem instead.)
Dim success As Long
success = privkey.LoadPemFile("somePath/myPrivateKey.pem")
If (success <> 1) Then
    Debug.Print privkey.LastErrorText
    Exit Sub
End If

Dim rsa As New ChilkatRsa
' Use RSA-PSS by setting OaepPadding = 1
rsa.OaepPadding = 1
' Use SHA256
rsa.OaepHash = "SHA-256"

success = rsa.ImportPrivateKeyObj(privkey)

' Generate a base64 signature.
rsa.EncodingMode = "base64"

Dim sigStr As String
sigStr = rsa.SignStringENC("String to be signed","SHA-256")
If (rsa.LastMethodSuccess <> 1) Then
    Debug.Print rsa.LastErrorText
    Exit Sub
End If

Debug.Print "Signature: " & sigStr