(SQL Server) PKCS7 Decrypt MIME

Loads a PKCS7 encrypted MIME file and decrypts. The cert and private key used for decryption is loaded from a PFX file.

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 requires the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

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

    -- Load the MIME
    DECLARE @success int
    EXEC sp_OAMethod @mime, 'LoadMimeFile', @success OUT, 'encryptedMime.txt'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @mime, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @mime
        RETURN
      END

    -- The AddPfxSourceFile and/or AddPfxSourceData
    -- methods may be called one or more times (one per PFX)
    -- to add sources from which the MIME component will
    -- search for certificates and private keys when decrypting.
    DECLARE @pfxPassword nvarchar(4000)
    SELECT @pfxPassword = 'myPassword'
    EXEC sp_OAMethod @mime, 'AddPfxSourceFile', @success OUT, 'myCertAndPrivateKey.pfx', @pfxPassword
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @mime, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @mime
        RETURN
      END

    -- Decrypt...
    EXEC sp_OAMethod @mime, 'Decrypt', @success OUT
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @mime, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @mime
        RETURN
      END

    -- Display the decrypted MIME:
    EXEC sp_OAMethod @mime, 'GetMime', @sTmp0 OUT
    PRINT @sTmp0

    EXEC @hr = sp_OADestroy @mime


END
GO