RSA OAEP Padding

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

Download Chilkat RSA Public-Key Encryption ActiveX

CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @rsa int
    EXEC @hr = sp_OACreate 'Chilkat.Rsa', @rsa OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @success int

    EXEC sp_OAMethod @rsa, 'UnlockComponent', @success OUT, 'Anything for 30-day trial'
    IF @success <> 1
      BEGIN
        PRINT 'RSA component unlock failed'
        RETURN
      END

    --  RSA public key in XML format:
    DECLARE @publicKey nvarchar(4000)

    SELECT @publicKey = '<RSAKeyValue><Modulus>of3im3mRgd2NLXIGoK6uYLg6jj0Ug2b42rnqa5Tbwz2ieFqMJqt+++x2oqLYGurlz49nt+7/785g3XYWqoka4u9c9zul6YubIjnBM72dQy7rEkEfbUxgjcxqXyjZFx+FpaxFUecLu688XEu+9UA42VKiCgcl+E7TrqnfeeYpNXc=</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>'

    EXEC sp_OAMethod @rsa, 'ImportPublicKey', NULL, @publicKey

    --  To use Optimal Asymmetric Encryption Padding (OAEP) padding,
    --  simply set the OaepPadding property:
    EXEC sp_OASetProperty @rsa, 'OaepPadding', 1

    --  Encrypt a string and return the encrypted data base64-encoded:
    EXEC sp_OASetProperty @rsa, 'EncodingMode', 'base64'

    DECLARE @plainText nvarchar(4000)

    SELECT @plainText = 'RSA Encryption should be easy.'

    DECLARE @usePrivateKey int

    SELECT @usePrivateKey = 0
    DECLARE @encryptedStr nvarchar(4000)

    EXEC sp_OAMethod @rsa, 'EncryptStringENC', @encryptedStr OUT, @plainText, @usePrivateKey
    PRINT @encryptedStr
END
GO