Visual Basic 6.0

RSASSA-PSS Algorithm with SHA256 Hashing

See more RSA Examples

RSA encrypt a SHA256 hash with OAEP padding. Visual Basic 6.0

Dim success As Long
success = 0

' 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.)
success = privkey.LoadPemFile("somePath/myPrivateKey.pem")
If (success = 0) Then
    Debug.Print privkey.LastErrorText
    Exit Sub
End If

Dim rsa As New ChilkatRsa
' Use RSA-PSS by setting PkcsPadding = 0
rsa.PkcsPadding = 0
' Use SHA256
rsa.OaepHash = "SHA-256"

success = rsa.UsePrivateKey(privkey)

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

Dim sigStr As String
sigStr = rsa.SignStringENC("String to be signed","SHA-256")
If (rsa.LastMethodSuccess = 0) Then
    Debug.Print rsa.LastErrorText
    Exit Sub
End If

Debug.Print "Signature: " & sigStr