secrand.h

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/*
 * 2025 Quantum Resistant Cryptographic Solutions Corporation
 * All Rights Reserved.
 *
 * NOTICE: This software and all accompanying materials are the exclusive 
 * property of Quantum Resistant Cryptographic Solutions Corporation (QRCS).
 * The intellectual and technical concepts contained within this implementation 
 * are proprietary to QRCS and its authorized licensors and are protected under 
 * applicable U.S. and international copyright, patent, and trade secret laws.
 *
 * CRYPTOGRAPHIC STANDARDS:
 * - This software includes implementations of cryptographic algorithms such as 
 *   SHA3, AES, and others. These algorithms are public domain or standardized 
 *   by organizations such as NIST and are NOT the property of QRCS.
 * - However, all source code, optimizations, and implementations in this library 
 *   are original works of QRCS and are protected under this license.
 *
 * RESTRICTIONS:
 * - Redistribution, modification, or unauthorized distribution of this software, 
 *   in whole or in part, is strictly prohibited.
 * - This software is provided for non-commercial, educational, and research 
 *   purposes only. Commercial use in any form is expressly forbidden.
 * - Licensing and authorized distribution are solely at the discretion of QRCS.
 * - Any use of this software implies acceptance of these restrictions.
 *
 * DISCLAIMER:
 * This software is provided "as is," without warranty of any kind, express or 
 * implied, including but not limited to warranties of merchantability or fitness 
 * for a particular purpose. QRCS disclaims all liability for any direct, indirect, 
 * incidental, or consequential damages resulting from the use or misuse of this software.
 *
 * FULL LICENSE:
 * This software is subject to the **Quantum Resistant Cryptographic Solutions 
 * Proprietary License (QRCS-PL)**. The complete license terms are included 
 * in the LICENSE.txt file distributed with this software.
 *
 * Written by: John Underhill
 * Contact: john.underhill@protonmail.com
 */
 
#ifndef QSC_SECRAND_H
#define QSC_SECRAND_H
 
#include "common.h"
#include "csg.h"
 
QSC_CPLUSPLUS_ENABLED_START


#define QSC_SECRAND_SEED_SIZE 32ULL

#define QSC_SECRAND_CACHE_SIZE 1024ULL

QSC_EXPORT_API typedef struct
{
    qsc_csg_state hstate;                   
    uint8_t cache[QSC_SECRAND_CACHE_SIZE];  
    size_t cpos;                            
    bool init;                              
} qsc_secrand_state;

QSC_EXPORT_API int8_t qsc_secrand_next_char(void);

QSC_EXPORT_API uint8_t qsc_secrand_next_uchar(void);

QSC_EXPORT_API double qsc_secrand_next_double(void);

QSC_EXPORT_API int16_t qsc_secrand_next_int16(void);

QSC_EXPORT_API int16_t qsc_secrand_next_int16_max(int16_t maximum);

QSC_EXPORT_API int16_t qsc_secrand_next_int16_maxmin(int16_t maximum, int16_t minimum);

QSC_EXPORT_API uint16_t qsc_secrand_next_uint16(void);

QSC_EXPORT_API uint16_t qsc_secrand_next_uint16_max(uint16_t maximum);

QSC_EXPORT_API uint16_t qsc_secrand_next_uint16_maxmin(uint16_t maximum, uint16_t minimum);

QSC_EXPORT_API int32_t qsc_secrand_next_int32(void);

QSC_EXPORT_API int32_t qsc_secrand_next_int32_max(int32_t maximum);

QSC_EXPORT_API int32_t qsc_secrand_next_int32_maxmin(int32_t maximum, int32_t minimum);

QSC_EXPORT_API uint32_t qsc_secrand_next_uint32(void);

QSC_EXPORT_API uint32_t qsc_secrand_next_uint32_max(uint32_t maximum);

QSC_EXPORT_API uint32_t qsc_secrand_next_uint32_maxmin(uint32_t maximum, uint32_t minimum);

QSC_EXPORT_API int64_t qsc_secrand_next_int64(void);

QSC_EXPORT_API int64_t qsc_secrand_next_int64_max(int64_t maximum);

QSC_EXPORT_API int64_t qsc_secrand_next_int64_maxmin(int64_t maximum, int64_t minimum);

QSC_EXPORT_API uint64_t qsc_secrand_next_uint64(void);

QSC_EXPORT_API uint64_t qsc_secrand_next_uint64_max(uint64_t maximum);

QSC_EXPORT_API uint64_t qsc_secrand_next_uint64_maxmin(uint64_t maximum, uint64_t minimum);

QSC_EXPORT_API void qsc_secrand_dispose(void);

QSC_EXPORT_API void qsc_secrand_initialize(const uint8_t* seed, size_t seedlen, const uint8_t* custom, size_t custlen);

QSC_EXPORT_API bool qsc_secrand_generate(uint8_t* output, size_t length);
 
QSC_CPLUSPLUS_ENABLED_END
 
#endif