keyschedule.h

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#ifndef QUIC_SCHEDULE_DRIVE_KEYSCHEDULE_H
#define QUIC_SCHEDULE_DRIVE_KEYSCHEDULE_H
 
#include "common/bytes/span/span.h"
#include "tls/handshake/core/tls/initial.h"


enum {
  QUIC_KS_CLIENT_HS = 0, 
  QUIC_KS_SERVER_HS = 1, 
  QUIC_KS_CLIENT_AP = 2, 
  QUIC_KS_SERVER_AP = 3, 
};

typedef struct {
  int stage;                 
  u8  master[QUIC_HKDF_PRK]; 
  quic_initial_keys keys[4]; 
  u8 client_ap_secret[QUIC_HKDF_PRK]; 
  u8 server_ap_secret[QUIC_HKDF_PRK]; 
  u8 exporter_secret[QUIC_HKDF_PRK];  
  u16 suite; 
} quic_keysched;

void quic_keysched_init(quic_keysched* st);

void quic_keysched_set_suite(quic_keysched* st, u16 suite);

int quic_keysched_advance_handshake(
    quic_keysched* st, quic_span ecdhe, quic_span transcript);

int quic_keysched_advance_handshake_psk(
    quic_keysched* st, quic_span psk, quic_span ecdhe, quic_span transcript);

int quic_keysched_advance_master(
    quic_keysched* st, const u8* transcript, usz transcript_len);

int quic_keysched_get(
    const quic_keysched* st, int which, const quic_initial_keys** out);

int quic_keysched_client_ap_secret(const quic_keysched* st, const u8** out);

int quic_keysched_server_ap_secret(const quic_keysched* st, const u8** out);

int quic_keysched_exporter_secret(const quic_keysched* st, const u8** out);
 
#endif