ECCParams.h

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/*
 * Copyright (c) 2017-2019, Texas Instruments Incorporated
 * All rights reserved.
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 *    from this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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#ifndef ti_drivers_cryptoutils_ecc_ECCParams__include
#define ti_drivers_cryptoutils_ecc_ECCParams__include

#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>

#include <ti/drivers/cryptoutils/cryptokey/CryptoKey.h>

#ifdef __cplusplus
extern "C" {
#endif

/* Error status codes for the utility functions */

#define ECCParams_STATUS_SUCCESS         (0)

#define ECCParams_STATUS_ERROR           (-1)

typedef uint32_t ECCParams_CurveType;

#define ECCParams_CURVE_TYPE_NONE 0U
#define ECCParams_CURVE_TYPE_SHORT_WEIERSTRASS_AN3 1U
#define ECCParams_CURVE_TYPE_SHORT_WEIERSTRASS_GEN 2U
#define ECCParams_CURVE_TYPE_MONTGOMERY 3U
#define ECCParams_CURVE_TYPE_EDWARDS 4U

typedef struct ECCParams_ECCPoint {
    const uint8_t *x;
    const uint8_t *y;
} ECCParams_ECCPoint;

typedef struct ECCParams_CurveParams {
    const ECCParams_CurveType   curveType;
    const uint8_t               *prime;
    const uint8_t               *a;
    const uint8_t               *b;
    const uint8_t               *order;
    const ECCParams_ECCPoint    *g;
    const ECCParams_ECCPoint    *t;
    uint16_t                    primeBitLength;
    uint16_t                    orderBitLength;
    uint8_t                     cofactor;
    uint8_t                     curveID;
    uint16_t                    reserved;

    /* Below: differences between implementations that need to be aligned */
    const size_t                length;
    const uint8_t               *generatorX;
    const uint8_t               *generatorY;
    ECCParams_ECCPoint          generator;
    ECCParams_ECCPoint          precomputed;
} ECCParams_CurveParams;



/* Short Weierstrass curves */

extern const ECCParams_CurveParams ECCParams_NISTP224;

extern const ECCParams_CurveParams ECCParams_NISTP256;

extern const ECCParams_CurveParams ECCParams_NISTP384;

extern const ECCParams_CurveParams ECCParams_NISTP521;

extern const ECCParams_CurveParams ECCParams_BrainpoolP256R1;

extern const ECCParams_CurveParams ECCParams_BrainpoolP384R1;

extern const ECCParams_CurveParams ECCParams_BrainpoolP512R1;



/* Montgomery curves */

extern const ECCParams_CurveParams ECCParams_Curve25519;



/* Edwards curves */

/* Utility functions */

int_fast16_t ECCParams_FormatCurve25519PrivateKey(CryptoKey *myPrivateKey);

#ifdef __cplusplus
}
#endif

#endif /* ti_drivers_cryptoutils_ecc_ECCParams__include */