RSA OAEP Padding

Download Chilkat RSA ActiveX

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

Dim rsa As New ChilkatRsa

Dim success As Long
success = rsa.UnlockComponent("Anything for 30-day trial")
If (success <> 1) Then
    MsgBox "RSA component unlock failed"
    Exit Sub
End If

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

rsa.ImportPublicKey publicKey

'  To use Optimal Asymmetric Encryption Padding (OAEP) padding,
'  simply set the OaepPadding property:
rsa.OaepPadding = 1

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

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

Dim usePrivateKey As Long
usePrivateKey = 0
Dim encryptedStr As String
encryptedStr = rsa.EncryptStringENC(plainText,usePrivateKey)
Text1.Text = Text1.Text & encryptedStr & vbCrLf
Text1.Refresh