owner-nrf52sdk/nRF5_SDK_17.0.2/components/libraries/crypto/nrf_crypto_eddsa_backend.h

/**
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#ifndef NRF_CRYPTO_EDDSA_BACKEND_H__
#define NRF_CRYPTO_EDDSA_BACKEND_H__
#if !defined(__SDK_DOXYGEN__)

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

#include "sdk_config.h"
#include "nrf_crypto_ecdsa_shared.h"

// Include all backends
#include "cc310_backend_eddsa.h"
#include "oberon_backend_eddsa.h"


#ifdef __cplusplus
extern "C" {
#endif

#if !NRF_CRYPTO_ECC_ED25519_ENABLED

// Context sizes are zero for disabled functionality
#define NRF_CRYPTO_BACKEND_ED25519_SIGN_CONTEXT_SIZE 0
#define NRF_CRYPTO_BACKEND_ED25519_VERIFY_CONTEXT_SIZE 0

// Dummy typedefs for disabled contexts
typedef uint8_t nrf_crypto_backend_ed25519_sign_context_t;
typedef uint8_t nrf_crypto_backend_ed25519_verify_context_t;

#endif

#ifdef __cplusplus
}
#endif

#endif // !defined(__SDK_DOXYGEN__)
#endif // NRF_CRYPTO_EDDSA_BACKEND_H__