(SQL Server) Generate an RSA Key and Save to Encrypted PEM

See more RSA Examples

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

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

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 0

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

    -- Generate a 2048-bit key.
    DECLARE @privKey int
    EXEC @hr = sp_OACreate 'Chilkat.PrivateKey', @privKey OUT

    EXEC sp_OAMethod @rsa, 'GenKey', @success OUT, 2048, @privKey
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @rsa, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @rsa
        EXEC @hr = sp_OADestroy @privKey
        RETURN
      END

    DECLARE @password nvarchar(4000)
    SELECT @password = 'secret'
    -- Saving to a relative path (from the current working directory of the process).
    DECLARE @path nvarchar(4000)
    SELECT @path = 'rsaKeys/myTestRsaPrivate.pem'
    -- Encrypt the PEM using 256-bit AES encryption.
    EXEC sp_OASetProperty @privKey, 'Pkcs8EncryptAlg', 'aes256'
    EXEC sp_OAMethod @privKey, 'SavePkcs8EncryptedPemFile', @success OUT, @password, @path
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @privKey, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @rsa
        EXEC @hr = sp_OADestroy @privKey
        RETURN
      END

    -- 

    -- We can also save the public key.
    -- There is no need to encrypt public keys.
    DECLARE @pubKey int
    EXEC @hr = sp_OACreate 'Chilkat.PublicKey', @pubKey OUT

    EXEC sp_OAMethod @privKey, 'ToPublicKey', @success OUT, @pubKey

    SELECT @path = 'rsaKeys/myTestRsaPublic.pem'
    -- Choose PKCS1 or PKCS8
    -- We'll choose PKCS8.
    DECLARE @preferPkcs1 int
    SELECT @preferPkcs1 = 0
    EXEC sp_OAMethod @pubKey, 'SavePemFile', @success OUT, @preferPkcs1, @path
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pubKey, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @rsa
        EXEC @hr = sp_OADestroy @privKey
        EXEC @hr = sp_OADestroy @pubKey
        RETURN
      END

    -- 


    PRINT 'Success.'

    EXEC @hr = sp_OADestroy @rsa
    EXEC @hr = sp_OADestroy @privKey
    EXEC @hr = sp_OADestroy @pubKey


END
GO