SQL Server

Creates an AES Encrypted Zip with One File Unencrypted

See more Zip Examples

Demonstrates how to create an AES encrypted zip, but also containing one file that is not encrypted. The way we do it is to first create an AES encrypted zip in the usual way, and then we append an unecrypted file to it. SQL Server

-- 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

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

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

    EXEC sp_OAMethod @zip, 'NewZip', @success OUT, 'qa_output/aes_with_one_unencrypted.zip'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @zip, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @zip
        RETURN
      END

    -- Set properties to indicate that the Zip should be
    -- AES encrypted.

    -- A value of 4 indicates WinZip compatible AES encryption.
    EXEC sp_OASetProperty @zip, 'Encryption', 4

    -- Key length can be 128, 192, or 256 bits.
    EXEC sp_OASetProperty @zip, 'EncryptKeyLength', 128

    -- Set the password for AES encryption:
    EXEC sp_OASetProperty @zip, 'EncryptPassword', 'myPassword'

    -- Exclude the file helloWorld.txt
    -- This file will be added unencrypted to the .zip
    DECLARE @saExclusions int
    EXEC @hr = sp_OACreate 'Chilkat.StringArray', @saExclusions OUT

    EXEC sp_OAMethod @saExclusions, 'Append', @success OUT, 'helloWorld.txt'
    EXEC sp_OAMethod @zip, 'SetExclusions', NULL, @saExclusions

    EXEC sp_OASetProperty @zip, 'VerboseLogging', 1

    -- Add a directory tree to be zipped.
    DECLARE @recurse int
    SELECT @recurse = 1
    -- Append from a directory relative to our current working directory.
    EXEC sp_OASetProperty @zip, 'AppendFromDir', 'qa_data/filesToZip'
    EXEC sp_OAMethod @zip, 'AppendFiles', @success OUT, '*', @recurse
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @zip, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @zip
        EXEC @hr = sp_OADestroy @saExclusions
        RETURN
      END

    EXEC sp_OAGetProperty @zip, 'LastErrorText', @sTmp0 OUT
    PRINT @sTmp0

    -- Writes qa_output/aes_with_one_unencrypted.zip
    EXEC sp_OAMethod @zip, 'WriteZipAndClose', @success OUT
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @zip, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @zip
        EXEC @hr = sp_OADestroy @saExclusions
        RETURN
      END

    -- ----------------------------------------------
    -- At this point, we have an encrypted .zip with all 
    -- files except for helloWorld.txt.
    -- We'll add helloWorld.txt (unencrypted) to the .zip we just created.

    -- The NewZip method only initializes the Zip object -- it does
    -- not create or write a .zip file.

    EXEC sp_OAMethod @zip, 'NewZip', @success OUT, 'notUsed.zip'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @zip, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @zip
        EXEC @hr = sp_OADestroy @saExclusions
        RETURN
      END

    EXEC sp_OAMethod @saExclusions, 'Clear', NULL
    EXEC sp_OAMethod @zip, 'SetExclusions', NULL, @saExclusions

    -- No encryption.
    EXEC sp_OASetProperty @zip, 'Encryption', 0

    EXEC sp_OASetProperty @zip, 'AppendFromDir', 'qa_data/filesToZip'

    -- Add a reference to a file.  This is the file that will
    -- be added to a already-existing .zip.  
    DECLARE @saveExtraPath int
    SELECT @saveExtraPath = 0
    EXEC sp_OAMethod @zip, 'AddFile', @success OUT, 'helloWorld.txt', @saveExtraPath
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @zip, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @zip
        EXEC @hr = sp_OADestroy @saExclusions
        RETURN
      END

    -- Appends the contents of the zip object to the preExisting.zip
    -- zip archive.  preExisting.zip is opened, and the files
    -- referenced by this zip object are streamed in, compressed,
    -- and appended to the end of the archive.
    EXEC sp_OAMethod @zip, 'QuickAppend', @success OUT, 'qa_output/aes_with_one_unencrypted.zip'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @zip, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @zip
        EXEC @hr = sp_OADestroy @saExclusions
        RETURN
      END


    PRINT 'Success!'

    EXEC @hr = sp_OADestroy @zip
    EXEC @hr = sp_OADestroy @saExclusions


END
GO