keyschedule.h

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


enum {
  KS_CLIENT_HS = 0, 
  KS_SERVER_HS = 1, 
  KS_CLIENT_AP = 2, 
  KS_SERVER_AP = 3, 
};

typedef struct {
  int stage;                         
  u8  master[TLS_HASH_MAX];          
  initial_keys keys[4];              
  u8 client_ap_secret[TLS_HASH_MAX]; 
  u8 server_ap_secret[TLS_HASH_MAX]; 
  u8 exporter_secret[TLS_HASH_MAX];  
  u16 suite;   
  u32 version; 
} keysched;

void keysched_init(keysched* st);

void keysched_set_suite(keysched* st, u16 suite);

void keysched_set_version(keysched* st, u32 version);

int keysched_advance_handshake(
    keysched* st, wired_span ecdhe, wired_span transcript);

int keysched_advance_handshake_psk(
    keysched* st, wired_span psk, wired_span ecdhe, wired_span transcript);

int keysched_advance_master(
    keysched* st, const u8* transcript, usz transcript_len);

int keysched_get(const keysched* st, int which, const initial_keys** out);

int keysched_client_ap_secret(const keysched* st, const u8** out);

int keysched_server_ap_secret(const keysched* st, const u8** out);

int keysched_exporter_secret(const keysched* st, const u8** out);

void keysched_wipe(keysched* st);
 
#endif