(Visual FoxPro) 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.

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

LOCAL lnSuccess
LOCAL loRsa
LOCAL lcPubKeyXml
LOCAL loPubKey
LOCAL lcPlainText
LOCAL lnUsePrivateKey
LOCAL lcEncryptedStr

lnSuccess = 0

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

loRsa = CreateObject('Chilkat.Rsa')

* RSA public key in XML format:
lcPubKeyXml = "<RSAPublicKey><Modulus>of3im3mRgd2NLXIGoK6uYLg6jj0Ug2b42rnqa5Tbwz2ieFqMJqt+++x2oqLYGurlz49nt+7/785g3XYWqoka4u9c9zul6YubIjnBM72dQy7rEkEfbUxgjcxqXyjZFx+FpaxFUecLu688XEu+9UA42VKiCgcl+E7TrqnfeeYpNXc=</Modulus><Exponent>AQAB</Exponent></RSAPublicKey>"

loPubKey = CreateObject('Chilkat.PublicKey')
lnSuccess = loPubKey.LoadFromString(lcPubKeyXml)
IF (lnSuccess = 0) THEN
    ? loPubKey.LastErrorText
    RELEASE loRsa
    RELEASE loPubKey
    CANCEL
ENDIF

lnSuccess = loRsa.UsePublicKey(loPubKey)
IF (lnSuccess = 0) THEN
    ? loRsa.LastErrorText
    RELEASE loRsa
    RELEASE loPubKey
    CANCEL
ENDIF

* To use Optimal Asymmetric Encryption Padding (OAEP) padding,
* simply set the PkcsPadding property to 0
loRsa.PkcsPadding = 0

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

lcPlainText = "RSA Encryption should be easy."

lnUsePrivateKey = 0
lcEncryptedStr = loRsa.EncryptStringENC(lcPlainText,lnUsePrivateKey)
? lcEncryptedStr

RELEASE loRsa
RELEASE loPubKey