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Python for Offensive PenTest

You're reading from   Python for Offensive PenTest A practical guide to ethical hacking and penetration testing using Python

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Product type Paperback
Published in Apr 2018
Publisher Packt
ISBN-13 9781788838979
Length 176 pages
Edition 1st Edition
Languages
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Author (1):
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Hussam Khrais Hussam Khrais
Author Profile Icon Hussam Khrais
Hussam Khrais
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Table of Contents (8) Chapters Close

Preface 1. Warming up – Your First Antivirus-Free Persistence Shell 2. Advanced Scriptable Shell FREE CHAPTER 3. Password Hacking 4. Catch Me If You Can! 5. Miscellaneous Fun in Windows 6. Abuse of Cryptography by Malware 7. Other Books You May Enjoy

Protecting your tunnel with AES – stream mode

In this section, we will protect our TCP tunnel with AES encryption. Now, generally speaking, AES encryption can operate in two modes, the Counter (CTR) mode encryption (also called the Stream Mode) and the Cipher Block Chaining (CBC) mode encryption (also called the Block Mode).

Cipher Block Chaining (CBC) mode encryption

The Block Mode means that we need to send data in the form of chunks:

For instance, if we say that we have a block size of 512 bytes and we want to send 500 bytes, then we need to add 12 bytes additional padding to reach 512 bytes of total size. If we want to send 514 bytes, then the first 512 bytes will be sent in a chunk and the second...

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