Provides elliptic curve cryptography functions for Diffie-Hellman shared secret exchange. More...

Modules
	Definitions specific to secp160r1 (NIST 160-bit)

	Definitions specific to secp160r2 (NIST 160-bit)

	Definitions specific to secp192r1 (NIST 192-bit)

	Definitions specific to secp224r1 (NIST 224-bit)

	Definitions specific to secp256r1 (NIST 256-bit)

	Definitions specific to secp384r1 (NIST 384-bit)

	Definitions specific to secp521r1 (NIST 521-bit)

	Definitions specific to secp160k1 (Koblitz 160-bit)

	Definitions specific to secp192k1 (Koblitz 192-bit)

	Definitions specific to secp224k1 (Koblitz 224-bit)

	Definitions specific to secp256k1 (Koblitz 256-bit)

	Definitions specific to bp256r1 (Brainpool 256-bit)

	Definitions specific to bp384r1 (Brainpool 384-bit)

	Definitions specific to bp512r1 (Brainpool 512-bit)

	Definitions specific to Curve25519

Data Structures
union	nrf_crypto_ecdh_context_t
	Union holding a context for ECDH computation. More...

Macros
#define	NRF_CRYPTO_ECDH_SHARED_SECRET_MAX_SIZE NRF_CRYPTO_ECC_RAW_PRIVATE_KEY_MAX_SIZE
	Maximum size of a shared secret in bytes for all enabled curves.

Typedefs
typedef uint8_t	nrf_crypto_ecdh_shared_secret_t [NRF_CRYPTO_BACKEND_ECC_RAW_PRIVATE_KEY_MAX_SIZE]
	Array type of a shared secret for any of the enabled curves.

Functions
ret_code_t	nrf_crypto_ecdh_compute (nrf_crypto_ecdh_context_t p_context, nrf_crypto_ecc_private_key_t const p_private_key, nrf_crypto_ecc_public_key_t const p_public_key, uint8_t p_shared_secret, size_t *p_shared_secret_size)
	Computes shared secret using ECC Diffie-Hellman. More...

Detailed Description

Provides elliptic curve cryptography functions for Diffie-Hellman shared secret exchange.

Function Documentation

ret_code_t nrf_crypto_ecdh_compute	(	nrf_crypto_ecdh_context_t *	p_context,
		nrf_crypto_ecc_private_key_t const *	p_private_key,
		nrf_crypto_ecc_public_key_t const *	p_public_key,
		uint8_t *	p_shared_secret,
		size_t *	p_shared_secret_size
	)

Computes shared secret using ECC Diffie-Hellman.

Parameters

[in]	p_context	Pointer to temporary structure holding context information. If it is NULL, necessary data will be allocated with NRF_CRYPTO_ALLOC and freed at the end of the function.
[in]	p_private_key	Pointer to structure holding a private key.
[in]	p_public_key	Pointer to structure holding a public key received from the other party.
[out]	p_shared_secret	Pointer to buffer where shared secret will be put.
[in,out]	p_shared_secret_size	Maximum number of bytes that `p_shared_secret` buffer can hold on input and the actual number of bytes used by the data on output. Actual size for selected curve is defined by the preprocessor definitions, e.g. NRF_CRYPTO_ECDH_SECP256R1_SHARED_SECRET_SIZE.