ref: 80cf8cd0acd5039d149bc86d640b1c2eca7a1f19
dir: /libauthsrv/hkdf_x_plan9.c/
#include <u.h> #include <libc.h> #include <libsec.h> #include <authsrv.h> void hkdf_x_plan9(uchar crand[2*NONCELEN], uchar key[NONCELEN], uchar secret[256]) { static char info[] = "Plan 9 session secret"; hkdf_x(crand, 2*NONCELEN, (uchar*)info, sizeof(info)-1, key, NONCELEN, secret, 256, hmac_sha2_256, SHA2_256dlen); }