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* Codebase restructured to SourceSDK codebase style and .cpp/.h assertion paths in the game executable. * Document most functions with valve style 'Purpose' blocks. * Rename variables to match the rest of the codebase and Valve's naming convention. * Dedicated DLL and the SDKLauncher now share the same codebase as the DevSDK. * Obtain globals or pointers directly instead of waiting for runtime initialized data. * Dynamically search for all functions and globals (this doesn't count for dedicated yet!). * Initialize most in-SDK variables. * Move certain prints and other utilities under ConVars to reduce verbosity and increase performance. * Print all pattern scan results through a virtual function to make it easier to add and debug new patterns in the future. * Type global var pointers appropriately if class or type is known and implemented. * Forward declare 'CClient' class to avoid having 2 'g_pClient' copies. * Add IDA's pseudo definitions for easier prototyping with decompiled assembly code. * RPAK decompress Command callback implementation. * Load decompressed RPaks from 'paks\Win32\' overriding the ones in 'paks\Win64\' (the decompress callback will automatically fix the header and write it to 'paks\Win32\'). * VPK decompress Command callback implementation. * Move CRC32 ands Adler32 to implementation files. * Server will print out more details about the connecting client. * Upgrade ImGui lib to v1.86. * Don't compile id3dx.h for dedicated. * Don't compile id3dx.cpp for dedicated * Implement DevMsg print function allowing to print information to the in-game VGUI/RUI console overlay, ImGui console overlay and the external windows console * Fixed bug where the Error function would not properly terminate the process when an error is called. This caused access violations for critical/non-recoverable errors. * Fixed bug where the game would crash if the console or server browser was enabled while the game was still starting up. * Several bug fixes for the dedicated server (warning: dedicated is still considered work-in-progress!).
63 lines
2.0 KiB
C++
63 lines
2.0 KiB
C++
// Purpose: Header file for the C++ ICE encryption class.
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// Taken from public domain code, as written by Matthew Kwan - July 1996
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// http://www.darkside.com.au/ice/
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#ifndef _IceKey_H
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#define _IceKey_H
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/*
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The IceKey class is used for encrypting and decrypting 64-bit blocks of data
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with the ICE (Information Concealment Engine) encryption algorithm.
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The constructor creates a new IceKey object that can be used to encrypt and decrypt data.
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The level of encryption determines the size of the key, and hence its speed.
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Level 0 uses the Thin-ICE variant, which is an 8-round cipher taking an 8-byte key.
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This is the fastest option, and is generally considered to be at least as secure as DES,
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although it is not yet certain whether it is as secure as its key size.
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For levels n greater than zero, a 16n-round cipher is used, taking 8n-byte keys.
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Although not as fast as level 0, these are very very secure.
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Before an IceKey can be used to encrypt data, its key schedule must be set with the set() member function.
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The length of the key required is determined by the level, as described above.
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The member functions encrypt() and decrypt() encrypt and decrypt respectively data
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in blocks of eight chracters, using the specified key.
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Two functions keySize() and blockSize() are provided
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which return the key and block size respectively, measured in bytes.
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The key size is determined by the level, while the block size is always 8.
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The destructor zeroes out and frees up all memory associated with the key.
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*/
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class IceSubkey;
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class IceKey {
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public:
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IceKey (int n);
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~IceKey ();
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void set (const unsigned char *key);
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void encrypt (const unsigned char *plaintext,
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unsigned char *ciphertext) const;
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void decrypt (const unsigned char *ciphertext,
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unsigned char *plaintext) const;
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int keySize () const;
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int blockSize () const;
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private:
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void scheduleBuild (unsigned short *k, int n,
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const int *keyrot);
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int _size;
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int _rounds;
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IceSubkey *_keysched;
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};
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#endif
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