Initial commit of Command & Conquer Red Alert source code.

2025-12-15 15:11:39 -05:00 · 2025-02-27 16:15:05 +00:00
parent b685cea758
commit 5e733d5dcc
2082 changed files with 797727 additions and 0 deletions
--- a/CODE/BLOWFISH.H
+++ b/CODE/BLOWFISH.H
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+/*
+**	Command & Conquer Red Alert(tm)
+**	Copyright 2025 Electronic Arts Inc.
+**
+**	This program is free software: you can redistribute it and/or modify
+**	it under the terms of the GNU General Public License as published by
+**	the Free Software Foundation, either version 3 of the License, or
+**	(at your option) any later version.
+**
+**	This program is distributed in the hope that it will be useful,
+**	but WITHOUT ANY WARRANTY; without even the implied warranty of
+**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+**	GNU General Public License for more details.
+**
+**	You should have received a copy of the GNU General Public License
+**	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/* $Header: /CounterStrike/BLOWFISH.H 1     3/03/97 10:24a Joe_bostic $ */
+/***********************************************************************************************
+ ***              C O N F I D E N T I A L  ---  W E S T W O O D  S T U D I O S               ***
+ ***********************************************************************************************
+ *                                                                                             *
+ *                 Project Name : Command & Conquer                                            *
+ *                                                                                             *
+ *                    File Name : BLOWFISH.H                                                   *
+ *                                                                                             *
+ *                   Programmer : Joe L. Bostic                                                *
+ *                                                                                             *
+ *                   Start Date : 04/14/96                                                     *
+ *                                                                                             *
+ *                  Last Update : April 14, 1996 [JLB]                                         *
+ *                                                                                             *
+ *---------------------------------------------------------------------------------------------*
+ * Functions:                                                                                  *
+ * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
+
+#ifndef BLOWFISH_H
+#define BLOWFISH_H
+
+#include	<limits.h>
+
+
+/*
+**	The "bool" integral type was defined by the C++ committee in
+**	November of '94. Until the compiler supports this, use the following
+**	definition.
+*/
+#ifndef __BORLANDC__
+#ifndef TRUE_FALSE_DEFINED
+#define TRUE_FALSE_DEFINED
+enum {false=0,true=1};
+typedef int bool;
+#endif
+#endif
+
+
+/*
+**	This engine will process data blocks by encryption and decryption.
+**	The "Blowfish" algorithm is in the public domain. It uses
+**	a Feistal network (similar to IDEA). It has no known
+**	weaknesses, but is still relatively new. Blowfish is particularly strong
+**	against brute force attacks. It is also quite strong against linear and
+**	differential cryptanalysis. Its weakness is that it takes a relatively
+**	long time to set up with a new key (1/100th of a second on a P6-200).
+**	The time to set up a key is equivalent to encrypting 4240 bytes.
+*/
+class BlowfishEngine {
+	public:
+		BlowfishEngine(void) : IsKeyed(false) {}
+		~BlowfishEngine(void);
+
+		void Submit_Key(void const * key, int length);
+
+		int Encrypt(void const * plaintext, int length, void * cyphertext);
+		int Decrypt(void const * cyphertext, int length, void * plaintext);
+
+		/*
+		**	This is the maximum key length supported.
+		*/
+		enum {MAX_KEY_LENGTH=56};
+
+	private:
+		bool IsKeyed;
+
+		void Sub_Key_Encrypt(unsigned long & left, unsigned long & right);
+
+		void Process_Block(void const * plaintext, void * cyphertext, unsigned long const * ptable);
+		void Initialize_Tables(void);
+
+		enum {
+			ROUNDS = 16,		// Feistal round count (16 is standard).
+			BYTES_PER_BLOCK=8	// The number of bytes in each cypher block (don't change).
+		};
+
+		/*
+		**	Initialization data for sub keys. The initial values are constant and
+		**	filled with a number generated from pi. Thus they are not random but
+		**	they don't hold a weak pattern either.
+		*/
+		static unsigned long const P_Init[(int)ROUNDS+2];
+		static unsigned long const S_Init[4][UCHAR_MAX+1];
+
+		/*
+		**	Permutation tables for encryption and decryption.
+		*/
+ 		unsigned long P_Encrypt[(int)ROUNDS+2];
+ 		unsigned long P_Decrypt[(int)ROUNDS+2];
+
+		/*
+		**	S-Box tables (four).
+		*/
+		unsigned long bf_S[4][UCHAR_MAX+1];
+};
+
+#endif
+