67 lines
No EOL
2.2 KiB
C++
67 lines
No EOL
2.2 KiB
C++
/*
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** Command & Conquer Renegade(tm)
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** Copyright 2025 Electronic Arts Inc.
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**
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** This program is free software: you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation, either version 3 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef SRANDOM_H
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#define SRANDOM_H
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#include "random.h" // for the helper RNG
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//
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// SecureRandomClass - Generate random values that are suitable for use in cryptographic
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// applications (under UNIX at least).
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//
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// NOTE: The seed generation under windows isn't nearly as strong as under UNIX due to
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// the lack of /dev/random. If you have a good random source you can call 'Add_Seeds'
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// to improve the quality of the seed value.
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//
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// Currently the random seed generation under windows is piss-poor so make sure and call
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// Add_Seeds with some interesting data if you're going to use this!
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//
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// The seed values should be unguessable by an outside viewer and the random values have
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// good distribution properties.
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//
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class SecureRandomClass
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{
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public:
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SecureRandomClass();
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~SecureRandomClass();
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unsigned long Randval(); // get a 32 bit random value
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// Add randomness to the seed pool
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void Add_Seeds(unsigned char *values, int length);
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private:
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void Generate_Seed(void); // Generate the inital seed
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enum
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{
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SeedLength = 16, // bytes in random seed
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SHADigestBytes = 20 // length of SHA hash
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};
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static bool Initialized; // has the seed been initialized?
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static unsigned char Seeds[SeedLength]; // random seed values
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static unsigned int RandomCache[SHADigestBytes / sizeof(unsigned int)];
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static int RandomCacheEntries;
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static unsigned int Counter;
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static Random3Class RandomHelper;
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};
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#endif |