(SQL Server) Sign a File to Create a .p7s (Detached Signature)

SQL Server example to create a detached signature file (.p7s) for any type file. The signature can be verified by calling VerifyP7S and passing the original filename and the .p7s filename.

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
    DECLARE @iTmp0 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 @crypt int
    -- Use "Chilkat_9_5_0.Crypt2" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.Crypt2', @crypt OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    -- Use a digital certificate and private key from a PFX file (.pfx or .p12).
    DECLARE @signingCertSubject nvarchar(4000)
    SELECT @signingCertSubject = 'Acme Inc'
    DECLARE @pfxFilename nvarchar(4000)
    SELECT @pfxFilename = '/Users/chilkat/testData/pfx/acme.pfx'
    DECLARE @pfxPassword nvarchar(4000)
    SELECT @pfxPassword = 'test123'

    DECLARE @certStore int
    -- Use "Chilkat_9_5_0.CertStore" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.CertStore', @certStore OUT

    DECLARE @success int
    EXEC sp_OAMethod @certStore, 'LoadPfxFile', @success OUT, @pfxFilename, @pfxPassword
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @certStore, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @crypt
        EXEC @hr = sp_OADestroy @certStore
        RETURN
      END

    DECLARE @cert int
    EXEC sp_OAMethod @certStore, 'FindCertBySubjectCN', @cert OUT, @signingCertSubject
    EXEC sp_OAGetProperty @certStore, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 = 0
      BEGIN

        PRINT 'Failed to find certificate by subject common name.'
        EXEC @hr = sp_OADestroy @crypt
        EXEC @hr = sp_OADestroy @certStore
        RETURN
      END

    -- Tell the crypt component to use this cert.
    EXEC sp_OAMethod @crypt, 'SetSigningCert', @success OUT, @cert

    -- We can sign any type of file, creating a .p7s as output:
    DECLARE @inFile nvarchar(4000)
    SELECT @inFile = '/Users/chilkat/testData/pdf/sample.pdf'
    DECLARE @sigFile nvarchar(4000)
    SELECT @sigFile = '/Users/chilkat/testData/p7s/sample.p7s'

    EXEC sp_OAMethod @crypt, 'CreateP7S', @success OUT, @inFile, @sigFile
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @crypt, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @cert

        EXEC @hr = sp_OADestroy @crypt
        EXEC @hr = sp_OADestroy @certStore
        RETURN
      END

    EXEC sp_OAMethod @crypt, 'VerifyP7S', @success OUT, @inFile, @sigFile
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @crypt, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @cert

        EXEC @hr = sp_OADestroy @crypt
        EXEC @hr = sp_OADestroy @certStore
        RETURN
      END

    EXEC @hr = sp_OADestroy @cert


    PRINT 'Success!'

    EXEC @hr = sp_OADestroy @crypt
    EXEC @hr = sp_OADestroy @certStore


END
GO