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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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/** * DOC: ECDH Helper Functions * * To use ECDH with the KPP cipher API, the following data structure and * functions should be used. * * The ECC curves known to the ECDH implementation are specified in this * header file. * * To use ECDH with KPP, the following functions should be used to operate on * an ECDH private key. The packet private key that can be set with * the KPP API function call of crypto_kpp_set_secret. */
/* Curves IDs */#define ECC_CURVE_NIST_P192 0x0001#define ECC_CURVE_NIST_P256 0x0002#define ECC_CURVE_NIST_P384 0x0003#define ECC_CURVE_NIST_P521 0x0004
/** * struct ecdh - define an ECDH private key * * @key: Private ECDH key * @key_size: Size of the private ECDH key */struct ecdh { char *key; unsigned short key_size;};
/** * crypto_ecdh_key_len() - Obtain the size of the private ECDH key * @params: private ECDH key * * This function returns the packet ECDH key size. A caller can use that * with the provided ECDH private key reference to obtain the required * memory size to hold a packet key. * * Return: size of the key in bytes */unsigned int crypto_ecdh_key_len(const struct ecdh *params);
/** * crypto_ecdh_encode_key() - encode the private key * @buf: Buffer allocated by the caller to hold the packet ECDH * private key. The buffer should be at least crypto_ecdh_key_len * bytes in size. * @len: Length of the packet private key buffer * @p: Buffer with the caller-specified private key * * The ECDH implementations operate on a packet representation of the private * key. * * Return: -EINVAL if buffer has insufficient size, 0 on success */int crypto_ecdh_encode_key(char *buf, unsigned int len, const struct ecdh *p);
/** * crypto_ecdh_decode_key() - decode a private key * @buf: Buffer holding a packet key that should be decoded * @len: Length of the packet private key buffer * @p: Buffer allocated by the caller that is filled with the * unpacked ECDH private key. * * The unpacking obtains the private key by pointing @p to the correct location * in @buf. Thus, both pointers refer to the same memory. * * Return: -EINVAL if buffer has insufficient size, 0 on success */int crypto_ecdh_decode_key(const char *buf, unsigned int len, struct ecdh *p);
#endif