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(Ruby) Streaming Compression --> Streaming Encryption
Demonstrate how to feed a compression stream into an encryption stream. This example does the following:
Data File --> Compress --> Encrypt --> Application Reads
require 'chilkat' # This requires the Chilkat API to have been previously unlocked. # See Global Unlock Sample for sample code. # Initialize the compression object. compress = Chilkat::CkCompression.new() compress.put_Algorithm("deflate") # Initialize the encryption object. crypt = Chilkat::CkCrypt2.new() crypt.put_CryptAlgorithm("chacha20") crypt.put_KeyLength(256) crypt.put_EncodingMode("hex") ivHex = "000000000000000000000002" crypt.SetEncodedIV(ivHex,"hex") crypt.put_InitialCount(42) keyHex = "1c9240a5eb55d38af333888604f6b5f0473917c1402b80099dca5cbc207075c0" crypt.SetEncodedKey(keyHex,"hex") # Setup the streams. # streamC is for compression streamC = Chilkat::CkStream.new() # streamE is for encryption streamE = Chilkat::CkStream.new() # The source for the compressor is a file. streamC.put_SourceFile("qa_data/hamlet.xml") # The source for the encryptor is the output of the compressor stream. success = streamE.SetSourceStream(streamC) # Our application will be reading the output of streamE. # Start the compression and encryption streams in background threads.. # taskC is a CkTask taskC = compress.CompressStreamAsync(streamC) # taskE is a CkTask taskE = crypt.EncryptStreamAsync(streamE) success = taskC.Run() success = taskE.Run() # Read the compressed and encrypted bytes. outData = Chilkat::CkBinData.new() while (streamE.get_EndOfStream() != true) if (streamE.get_DataAvailable() == true) success = streamE.ReadBd(outData) end end # Let's make sure the background task finished. # It should already be the case that the task is finished. while ((taskE.get_Finished() != true) or (taskC.get_Finished() != true)) taskE.SleepMs(20) end # Get any remaining data that needs to be flushed. if (streamE.get_DataAvailable() == true) success = streamE.ReadBd(outData) end # Double-check for success.. if (taskE.get_TaskSuccess() != true) print "async encryption failed:" + "\n"; print taskE.resultErrorText() + "\n"; success = false end # Double-check for success.. if (taskC.get_TaskSuccess() != true) print "async compression failed:" + "\n"; print taskC.resultErrorText() + "\n"; success = false end # Save the compressed/encrypted data to a file. outData.WriteFile("qa_output/compressedEncrypted.dat") print "The async compress/encrypt was successful." + "\n"; # Let's decrypt and decompress to further verify... success = crypt.DecryptBd(outData) success = compress.DecompressBd(outData) # outData should contain the original data.. success = outData.WriteFile("qa_output/original_hamlet.xml")
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