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SQL Server Requires Chilkat v11.7.0+

Choose the PDF Encryption Algorithm: AES-256, AES-128 or RC4

See more PDF Protection Examples

Demonstrates the algorithmChoice option of the encrypt operation. aes-256 is the default and the one to use unless an older reader must open the file. aes-128 is for readers that predate AES-256. rc4-128 and rc4-40 are broken ciphers kept only for very old readers. Each algorithm needs a minimum PDF version, and the file header is raised to it when the PDF is saved, never lowered. A PDF saved with RC4 is written with a classic cross-reference table so that those old readers can parse it.

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--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @iTmp0 int
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @sTmp1 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 0

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

    --  The PDF used in this example is available at two_page_memo.pdf

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

    DECLARE @jsonOut int
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @jsonOut OUT

    DECLARE @info int
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @info OUT

    --  AES-256, the default.  Saved as PDF 1.7 with Adobe extension level 8.
    DECLARE @pdf1 int
    EXEC @hr = sp_OACreate 'Chilkat.Pdf', @pdf1 OUT

    EXEC sp_OAMethod @pdf1, 'LoadFile', @success OUT, 'qa_data/pdf/two_page_memo.pdf'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pdf1, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @jsonOut
        EXEC @hr = sp_OADestroy @info
        EXEC @hr = sp_OADestroy @pdf1
        RETURN
      END
    EXEC sp_OASetProperty @pdf1, 'UserPassword', 'user-secret'
    EXEC sp_OASetProperty @pdf1, 'OwnerPassword', 'owner-secret'
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'algorithmChoice', 'aes-256'
    EXEC sp_OAMethod @pdf1, 'Protection', @success OUT, 'encrypt', @json, @jsonOut
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pdf1, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @jsonOut
        EXEC @hr = sp_OADestroy @info
        EXEC @hr = sp_OADestroy @pdf1
        RETURN
      END

    EXEC sp_OAMethod @jsonOut, 'StringOf', @sTmp0 OUT, 'pending.pdfVersion'

    EXEC sp_OAMethod @jsonOut, 'IntOf', @iTmp0 OUT, 'pending.adobeExtensionLevel'
    PRINT 'aes-256 will be saved as PDF ' + @sTmp0 + ', Adobe extension level ' + @iTmp0
    EXEC sp_OAMethod @pdf1, 'WriteFile', @success OUT, 'qa_output/memo_aes256.pdf'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pdf1, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @jsonOut
        EXEC @hr = sp_OADestroy @info
        EXEC @hr = sp_OADestroy @pdf1
        RETURN
      END
    EXEC sp_OAMethod @pdf1, 'PreLoadCheck', @success OUT, 'qa_output/memo_aes256.pdf', @info
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pdf1, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @jsonOut
        EXEC @hr = sp_OADestroy @info
        EXEC @hr = sp_OADestroy @pdf1
        RETURN
      END

    EXEC sp_OAMethod @info, 'StringOf', @sTmp0 OUT, 'algorithm'

    EXEC sp_OAMethod @info, 'StringOf', @sTmp1 OUT, 'pdfVersion'
    PRINT '  saved file: ' + @sTmp0 + ', PDF ' + @sTmp1

    --  AES-128, for readers that predate AES-256.  Saved as PDF 1.6.
    DECLARE @pdf2 int
    EXEC @hr = sp_OACreate 'Chilkat.Pdf', @pdf2 OUT

    EXEC sp_OAMethod @pdf2, 'LoadFile', @success OUT, 'qa_data/pdf/two_page_memo.pdf'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pdf2, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @jsonOut
        EXEC @hr = sp_OADestroy @info
        EXEC @hr = sp_OADestroy @pdf1
        EXEC @hr = sp_OADestroy @pdf2
        RETURN
      END
    EXEC sp_OASetProperty @pdf2, 'UserPassword', 'user-secret'
    EXEC sp_OASetProperty @pdf2, 'OwnerPassword', 'owner-secret'
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'algorithmChoice', 'aes-128'
    EXEC sp_OAMethod @pdf2, 'Protection', @success OUT, 'encrypt', @json, @jsonOut
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pdf2, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @jsonOut
        EXEC @hr = sp_OADestroy @info
        EXEC @hr = sp_OADestroy @pdf1
        EXEC @hr = sp_OADestroy @pdf2
        RETURN
      END

    EXEC sp_OAMethod @jsonOut, 'StringOf', @sTmp0 OUT, 'pending.pdfVersion'
    PRINT 'aes-128 will be saved as PDF ' + @sTmp0
    EXEC sp_OAMethod @pdf2, 'WriteFile', @success OUT, 'qa_output/memo_aes128.pdf'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pdf2, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @jsonOut
        EXEC @hr = sp_OADestroy @info
        EXEC @hr = sp_OADestroy @pdf1
        EXEC @hr = sp_OADestroy @pdf2
        RETURN
      END
    EXEC sp_OAMethod @pdf2, 'PreLoadCheck', @success OUT, 'qa_output/memo_aes128.pdf', @info
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pdf2, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @jsonOut
        EXEC @hr = sp_OADestroy @info
        EXEC @hr = sp_OADestroy @pdf1
        EXEC @hr = sp_OADestroy @pdf2
        RETURN
      END

    EXEC sp_OAMethod @info, 'StringOf', @sTmp0 OUT, 'algorithm'

    EXEC sp_OAMethod @info, 'StringOf', @sTmp1 OUT, 'pdfVersion'
    PRINT '  saved file: ' + @sTmp0 + ', PDF ' + @sTmp1

    --  RC4-128, a broken cipher, only for readers too old for AES.  Saved as PDF 1.4.
    DECLARE @pdf3 int
    EXEC @hr = sp_OACreate 'Chilkat.Pdf', @pdf3 OUT

    EXEC sp_OAMethod @pdf3, 'LoadFile', @success OUT, 'qa_data/pdf/two_page_memo.pdf'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pdf3, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @jsonOut
        EXEC @hr = sp_OADestroy @info
        EXEC @hr = sp_OADestroy @pdf1
        EXEC @hr = sp_OADestroy @pdf2
        EXEC @hr = sp_OADestroy @pdf3
        RETURN
      END
    EXEC sp_OASetProperty @pdf3, 'UserPassword', 'user-secret'
    EXEC sp_OASetProperty @pdf3, 'OwnerPassword', 'owner-secret'
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'algorithmChoice', 'rc4-128'
    EXEC sp_OAMethod @pdf3, 'Protection', @success OUT, 'encrypt', @json, @jsonOut
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pdf3, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @jsonOut
        EXEC @hr = sp_OADestroy @info
        EXEC @hr = sp_OADestroy @pdf1
        EXEC @hr = sp_OADestroy @pdf2
        EXEC @hr = sp_OADestroy @pdf3
        RETURN
      END

    EXEC sp_OAMethod @jsonOut, 'StringOf', @sTmp0 OUT, 'pending.pdfVersion'
    PRINT 'rc4-128 will be saved as PDF ' + @sTmp0
    EXEC sp_OAMethod @pdf3, 'WriteFile', @success OUT, 'qa_output/memo_rc4_128.pdf'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pdf3, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @jsonOut
        EXEC @hr = sp_OADestroy @info
        EXEC @hr = sp_OADestroy @pdf1
        EXEC @hr = sp_OADestroy @pdf2
        EXEC @hr = sp_OADestroy @pdf3
        RETURN
      END
    EXEC sp_OAMethod @pdf3, 'PreLoadCheck', @success OUT, 'qa_output/memo_rc4_128.pdf', @info
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pdf3, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @jsonOut
        EXEC @hr = sp_OADestroy @info
        EXEC @hr = sp_OADestroy @pdf1
        EXEC @hr = sp_OADestroy @pdf2
        EXEC @hr = sp_OADestroy @pdf3
        RETURN
      END

    EXEC sp_OAMethod @info, 'StringOf', @sTmp0 OUT, 'algorithm'

    EXEC sp_OAMethod @info, 'StringOf', @sTmp1 OUT, 'pdfVersion'
    PRINT '  saved file: ' + @sTmp0 + ', PDF ' + @sTmp1

    --  Sample output:

    --  aes-256 will be saved as PDF 1.7, Adobe extension level 8
    --    saved file: aes-256, PDF 1.7
    --  aes-128 will be saved as PDF 1.6
    --    saved file: aes-128, PDF 1.6
    --  rc4-128 will be saved as PDF 1.4
    --    saved file: rc4-128, PDF 1.4

    EXEC @hr = sp_OADestroy @json
    EXEC @hr = sp_OADestroy @jsonOut
    EXEC @hr = sp_OADestroy @info
    EXEC @hr = sp_OADestroy @pdf1
    EXEC @hr = sp_OADestroy @pdf2
    EXEC @hr = sp_OADestroy @pdf3


END
GO