DOKK / manpages / debian 11 / libkcapi-dev / kcapi_kpp_ssgen.3.en
KCAPI_KPP_SSGEN(3) Programming Interface KCAPI_KPP_SSGEN(3)

kcapi_kpp_ssgen - generate a shared secret

int32_t kcapi_kpp_ssgen(struct kcapi_handle * handle, const uint8_t * pubkey, uint32_t pubkeylen, uint8_t * ss, uint32_t sslen, int access);

handle

[in] cipher handle

pubkey

[in] public key of peer that shall be used to generate the shared secret with

pubkeylen

[in] length of the public key buffer

ss

[out] generated shared secret

sslen

[in] length of key buffer

access

[in] kernel access type (KCAPI_ACCESS_HEURISTIC - use internal heuristic for fastest kernel access; KCAPI_ACCESS_VMSPLICE - use vmsplice access; KCAPI_ACCESS_SENDMSG - sendmsg access)

return number of bytes returned by the shared secret generation operation upon success; a negative errno-style error code if an error occurred

Stephan Mueller <smueller@chronox.de>

Author.

November 2020 libkcapi Manual 1.2.1