(SQL Server) Generate RSA Public/Private Key

SQL Server example code showing how to generate an RSA public/private key.

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

    DECLARE @rsa int
    -- Use "Chilkat_9_5_0.Rsa" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.Rsa', @rsa OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    -- Generate a 1024-bit key.  Chilkat RSA supports
    -- key sizes ranging from 512 bits to 4096 bits.
    -- Note: Starting in Chilkat v9.5.0.49, RSA key sizes can be up to 8192 bits.
    -- It takes a considerable amount of time and processing power to generate
    -- an 8192-bit key.
    DECLARE @success int
    EXEC sp_OAMethod @rsa, 'GenerateKey', @success OUT, 1024
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @rsa, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @rsa
        RETURN
      END

    -- Keys are exported in XML format:
    DECLARE @publicKey nvarchar(4000)
    EXEC sp_OAMethod @rsa, 'ExportPublicKey', @publicKey OUT

    PRINT @publicKey

    DECLARE @privateKey nvarchar(4000)
    EXEC sp_OAMethod @rsa, 'ExportPrivateKey', @privateKey OUT

    PRINT @privateKey

    EXEC @hr = sp_OADestroy @rsa


END
GO