(Visual FoxPro) Creates an AES Encrypted Zip with One File Unencrypted

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.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

LOCAL loZip
LOCAL lnSuccess
LOCAL loSaExclusions
LOCAL lnRecurse
LOCAL lnSaveExtraPath

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

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Zip')
loZip = CreateObject('Chilkat.Zip')

lnSuccess = loZip.NewZip("qa_output/aes_with_one_unencrypted.zip")
IF (lnSuccess <> 1) THEN
    ? loZip.LastErrorText
    RELEASE loZip
    CANCEL
ENDIF

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

* A value of 4 indicates WinZip compatible AES encryption.
loZip.Encryption = 4

* Key length can be 128, 192, or 256 bits.
loZip.EncryptKeyLength = 128

* Set the password for AES encryption:
loZip.EncryptPassword = "myPassword"

* Exclude the file helloWorld.txt
* This file will be added unencrypted to the .zip
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.StringArray')
loSaExclusions = CreateObject('Chilkat.StringArray')
loSaExclusions.Append("helloWorld.txt")
loZip.SetExclusions(loSaExclusions)

loZip.VerboseLogging = 1

* Add a directory tree to be zipped.
lnRecurse = 1
* Append from a directory relative to our current working directory.
loZip.AppendFromDir = "qa_data/filesToZip"
lnSuccess = loZip.AppendFiles("*",lnRecurse)
IF (lnSuccess <> 1) THEN
    ? loZip.LastErrorText
    RELEASE loZip
    RELEASE loSaExclusions
    CANCEL
ENDIF

? loZip.LastErrorText

* Writes qa_output/aes_with_one_unencrypted.zip
lnSuccess = loZip.WriteZipAndClose()
IF (lnSuccess <> 1) THEN
    ? loZip.LastErrorText
    RELEASE loZip
    RELEASE loSaExclusions
    CANCEL
ENDIF

* ----------------------------------------------
* 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.

lnSuccess = loZip.NewZip("notUsed.zip")
IF (lnSuccess <> 1) THEN
    ? loZip.LastErrorText
    RELEASE loZip
    RELEASE loSaExclusions
    CANCEL
ENDIF

loSaExclusions.Clear()
loZip.SetExclusions(loSaExclusions)

* No encryption.
loZip.Encryption = 0

loZip.AppendFromDir = "qa_data/filesToZip"

* Add a reference to a file.  This is the file that will
* be added to a already-existing .zip.  
lnSaveExtraPath = 0
lnSuccess = loZip.AppendOneFileOrDir("helloWorld.txt",lnSaveExtraPath)
IF (lnSuccess <> 1) THEN
    ? loZip.LastErrorText
    RELEASE loZip
    RELEASE loSaExclusions
    CANCEL
ENDIF

* 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.
lnSuccess = loZip.QuickAppend("qa_output/aes_with_one_unencrypted.zip")
IF (lnSuccess <> 1) THEN
    ? loZip.LastErrorText
    RELEASE loZip
    RELEASE loSaExclusions
    CANCEL
ENDIF

? "Success!"

RELEASE loZip
RELEASE loSaExclusions