Initial commit of Command & Conquer Renegade source code.

2025-12-16 07:31:40 -05:00 · 2025-02-27 16:39:46 +00:00
parent 74ab8fa5e0
commit 58ed459113
4918 changed files with 1366710 additions and 0 deletions
--- a/Code/wwlib/pk.h
+++ b/Code/wwlib/pk.h
@@ -0,0 +1,99 @@
+/*
+**	Command & Conquer Renegade(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/>.
+*/
+
+/*********************************************************************************************** 
+ ***              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                                            * 
+ *                                                                                             * 
+ *                     $Archive:: /G/wwlib/PK.H                                               $* 
+ *                                                                                             * 
+ *                      $Author:: Eric_c                                                      $*
+ *                                                                                             * 
+ *                     $Modtime:: 4/02/99 12:00p                                              $*
+ *                                                                                             * 
+ *                    $Revision:: 3                                                           $*
+ *                                                                                             *
+ *---------------------------------------------------------------------------------------------* 
+ * Functions:                                                                                  * 
+ * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
+#if _MSC_VER >= 1000
+#pragma once
+#endif // _MSC_VER >= 1000
+
+#ifndef PK_H
+#define PK_H
+
+#ifndef STRAW_H
+#include "straw.h"
+#endif
+
+#include	"int.h"
+
+/*
+**	This class holds a public or private key used in Public Key Cryptography. It also serves
+**	as the conduit for encrypting/decrypting data using that key. Cryptography, using this
+**	method, has a couple of characteristics that affect how it is used. One, the process of
+**	encrypting/decrypting is very slow. This limits the effective quantity of data that can
+**	be processed. Two, the ciphertext is larger than the plaintext. This property generally
+**	limits its use to streaming data as opposed to random access data. The data is processed
+**	in blocks. The size of the ciphertext and plaintext blocks can be determined only from
+**	the key itself.
+**
+**	A reasonable use of this technology would be to encrypt only critical data such as the
+**	password for a fast general purpose cryptographic algorithm.
+*/
+class PKey
+{
+	public:
+		PKey(void) : Modulus(0), Exponent(0), BitPrecision(0) {}
+		PKey(void const * exponent, void const * modulus);		// DER initialization.
+
+		int Encrypt(void const * source, int slen, void * dest) const;
+		int Decrypt(void const * source, int slen, void * dest) const;
+
+		static void Generate(Straw & random, int bits, PKey & fastkey, PKey & slowkey);
+
+		int Plain_Block_Size(void) const {return((BitPrecision-1)/8);}
+		int Crypt_Block_Size(void) const {return(Plain_Block_Size()+1);}
+		int Block_Count(int plaintext_length) const {return((((plaintext_length-1)/Plain_Block_Size())+1));}
+
+		int Encode_Modulus(void * buffer) const;
+		int Encode_Exponent(void * buffer) const;
+
+		void Decode_Modulus(void * buffer);
+		void Decode_Exponent(void * buffer);
+
+		static long Fast_Exponent(void) {return(65537L);}
+
+//	private:
+
+		// p*q
+		BigInt Modulus;
+
+		// 65537 or
+		// inverse of (p-1)(q-1).
+		BigInt Exponent;
+
+		// Maximum bits allowed for block.
+		int BitPrecision;
+};
+
+
+#endif