B4X Requires Chilkat v11.0.0+

RSA OAEP Padding

See more RSA Examples

Demonstrates how to use OAEP padding with the RSA encryption algorithm. More information about OAEP Padding. B4X

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 ChilkatRsa
rsa.Initialize

'  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 ChilkatPublicKey
pubKey.Initialize
success = pubKey.LoadFromString(pubKeyXml)
If success = False Then
    Log(pubKey.LastErrorText)
    Return
End If


success = rsa.UsePublicKey(pubKey)
If success = False Then
    Log(rsa.LastErrorText)
    Return
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)
Log(encryptedStr)