(VB.NET) RSA OAEP Padding

Demonstrates how to use OAEP padding with the RSA encryption algorithm. More information about OAEP Padding.

Note: This example requires Chilkat v11.0.0 or greater.

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Dim success As Boolean = False

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

Dim rsa As New Chilkat.Rsa

' RSA public key in XML format:
Dim pubKeyXml As String = "<RSAPublicKey><Modulus>of3im3mRgd2NLXIGoK6uYLg6jj0Ug2b42rnqa5Tbwz2ieFqMJqt+++x2oqLYGurlz49nt+7/785g3XYWqoka4u9c9zul6YubIjnBM72dQy7rEkEfbUxgjcxqXyjZFx+FpaxFUecLu688XEu+9UA42VKiCgcl+E7TrqnfeeYpNXc=</Modulus><Exponent>AQAB</Exponent></RSAPublicKey>"

Dim pubKey As New Chilkat.PublicKey
success = pubKey.LoadFromString(pubKeyXml)
If (success = False) Then
    Debug.WriteLine(pubKey.LastErrorText)
    Exit Sub
End If


success = rsa.UsePublicKey(pubKey)
If (success = False) Then
    Debug.WriteLine(rsa.LastErrorText)
    Exit Sub
End If


' To use Optimal Asymmetric Encryption Padding (OAEP) padding,
' simply set the PkcsPadding property to False
rsa.PkcsPadding = False

' Encrypt a string and return the encrypted data base64-encoded:
rsa.EncodingMode = "base64"

Dim plainText As String = "RSA Encryption should be easy."

Dim usePrivateKey As Boolean = False
Dim encryptedStr As String = rsa.EncryptStringENC(plainText,usePrivateKey)
Debug.WriteLine(encryptedStr)