poly1305.h

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/* 2020-2026 Quantum Resistant Cryptographic Solutions Corporation
 * All Rights Reserved.
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 * NOTICE:
 * This software and all accompanying materials are the exclusive property of
 * Quantum Resistant Cryptographic Solutions Corporation (QRCS). The intellectual
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 * CRYPTOGRAPHIC ALGORITHMS AND IMPLEMENTATIONS:
 * - This software includes implementations of cryptographic primitives and
 *   algorithms that are standardized or in the public domain, such as AES
 *   and SHA-3, which are not proprietary to QRCS.
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 *   algorithms designed by QRCS, including but not limited to RCS, SCB, CSX, QMAC, and
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 *   Public Research and Evaluation License (QRCS-PREL), 2025-2026.
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 * ARISING FROM THE USE OR MISUSE OF THIS SOFTWARE.
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 * This software is subject to the Quantum Resistant Cryptographic Solutions
 * Public Research and Evaluation License (QRCS-PREL), 2025-2026. The complete license terms
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 * Written by: John G. Underhill
 * Contact: contact@qrcscorp.ca
 */
 
#ifndef QSC_POLY1305_H
#define QSC_POLY1305_H
 
#include "qsccommon.h"
 
QSC_CPLUSPLUS_ENABLED_START


#define QSC_POLY1305_BLOCK_SIZE 16

#define QSC_POLY1305_KEY_SIZE 32

#define QSC_POLY1305_MAC_SIZE 16

QSC_EXPORT_API typedef struct qsc_poly1305_state
{
    uint32_t h[5U];                            
    uint32_t k[4U];                            
    uint32_t r[5U];                            
    uint32_t s[4U];                            
    uint8_t buf[QSC_POLY1305_BLOCK_SIZE]; 
    size_t fnl;                              
    size_t rmd;                              
} qsc_poly1305_state;
 

QSC_EXPORT_API void qsc_poly1305_blockupdate(qsc_poly1305_state* ctx, const uint8_t* message);

QSC_EXPORT_API void qsc_poly1305_compute(uint8_t* output, const uint8_t* message, size_t msglen, const uint8_t* key);

QSC_EXPORT_API void qsc_poly1305_dispose(qsc_poly1305_state* ctx);

QSC_EXPORT_API void qsc_poly1305_finalize(qsc_poly1305_state* ctx, uint8_t* mac);

QSC_EXPORT_API void qsc_poly1305_initialize(qsc_poly1305_state* ctx, const uint8_t key[QSC_POLY1305_KEY_SIZE]);

QSC_EXPORT_API void qsc_poly1305_reset(qsc_poly1305_state* ctx);

QSC_EXPORT_API void qsc_poly1305_update(qsc_poly1305_state* ctx, const uint8_t* message, size_t msglen);

QSC_EXPORT_API int32_t qsc_poly1305_verify(const uint8_t* code, const uint8_t* message, size_t msglen, const uint8_t* key);
 
QSC_CPLUSPLUS_ENABLED_END
 
#endif