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keys: Move master key derivation into own function

This commit is contained in:
shchmue 2022-03-31 13:58:26 -06:00
parent 582bc91605
commit 5f35c8396d
1 changed files with 29 additions and 24 deletions
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53
source/keys/keys.c
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@ -802,6 +802,34 @@ static bool _check_keyslot_access() {
return memcmp(test_data, "\x7b\x1d\x29\xa1\x6c\xf8\xcc\xab\x84\xf0\xb8\xa5\x98\xe4\x2f\xa6", SE_KEY_128_SIZE) == 0;
}
static void _derive_master_keys(key_derivation_ctx_t *prod_keys, key_derivation_ctx_t *dev_keys, bool is_dev) {
key_derivation_ctx_t *keys = is_dev ? dev_keys : prod_keys;
if (h_cfg.t210b01) {
_derive_master_key_mariko(keys, is_dev);
minerva_periodic_training();
_derive_master_keys_from_latest_key(keys, is_dev);
} else {
int res = _run_ams_keygen(keys);
if (res) {
return;
}
u8 *aes_keys = (u8 *)calloc(SZ_4K, 1);
se_get_aes_keys(aes_keys + SZ_2K, aes_keys, AES_128_KEY_SIZE);
memcpy(&dev_keys->tsec_root_key, aes_keys + 11 * AES_128_KEY_SIZE, AES_128_KEY_SIZE);
memcpy(keys->tsec_key, aes_keys + 12 * AES_128_KEY_SIZE, AES_128_KEY_SIZE);
memcpy(&prod_keys->tsec_root_key, aes_keys + 13 * AES_128_KEY_SIZE, AES_128_KEY_SIZE);
free(aes_keys);
_derive_master_keys_from_latest_key(prod_keys, false);
minerva_periodic_training();
_derive_master_keys_from_latest_key(dev_keys, true);
minerva_periodic_training();
_derive_keyblob_keys(keys);
}
}
static void _derive_keys() {
if (!f_stat("sd:/switch/partialaes.keys", NULL)) {
f_unlink("sd:/switch/partialaes.keys");
@ -834,30 +862,7 @@ static void _derive_keys() {
key_derivation_ctx_t __attribute__((aligned(4))) prod_keys = {0}, dev_keys = {0};
key_derivation_ctx_t *keys = is_dev ? &dev_keys : &prod_keys;
// Master key derivation
if (h_cfg.t210b01) {
_derive_master_key_mariko(keys, is_dev);
minerva_periodic_training();
_derive_master_keys_from_latest_key(keys, is_dev);
} else {
int res = _run_ams_keygen(keys);
if (res) {
return;
}
u8 *aes_keys = (u8 *)calloc(SZ_4K, 1);
se_get_aes_keys(aes_keys + SZ_2K, aes_keys, AES_128_KEY_SIZE);
memcpy(&dev_keys.tsec_root_key, aes_keys + 11 * AES_128_KEY_SIZE, AES_128_KEY_SIZE);
memcpy(keys->tsec_key, aes_keys + 12 * AES_128_KEY_SIZE, AES_128_KEY_SIZE);
memcpy(&prod_keys.tsec_root_key, aes_keys + 13 * AES_128_KEY_SIZE, AES_128_KEY_SIZE);
free(aes_keys);
_derive_master_keys_from_latest_key(&prod_keys, false);
minerva_periodic_training();
_derive_master_keys_from_latest_key(&dev_keys, true);
minerva_periodic_training();
_derive_keyblob_keys(keys);
}
_derive_master_keys(&prod_keys, &dev_keys, is_dev);
TPRINTFARGS("%kMaster keys... ", colors[(color_idx++) % 6]);