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add ctap function to overwrite key bytes

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This commit is contained in:
Conor Patrick 2019-10-08 11:34:15 -04:00
parent 7bcb7ea840
commit 0ebe0ff502
2 changed files with 13 additions and 0 deletions
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11
fido2/ctap.c
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@ -1761,7 +1761,18 @@ static void ctap_state_init()
printf1(TAG_STOR, "Generated PIN SALT: "); printf1(TAG_STOR, "Generated PIN SALT: ");
dump_hex1(TAG_STOR, STATE.PIN_SALT, sizeof STATE.PIN_SALT); dump_hex1(TAG_STOR, STATE.PIN_SALT, sizeof STATE.PIN_SALT);
}
/** Overwrite master secret from external source.
* @param keybytes an array of KEY_SPACE_BYTES length.
*
* This function should only be called from a privilege mode.
*/
void ctap_load_external_keys(uint8_t * keybytes){
memmove(STATE.key_space, keybytes, KEY_SPACE_BYTES);
authenticator_write_state(&STATE, 0);
authenticator_write_state(&STATE, 1);
crypto_load_master_secret(STATE.key_space);
} }
void ctap_init() void ctap_init()

2
fido2/ctap.h
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@ -361,4 +361,6 @@ extern uint8_t KEY_AGREEMENT_PUB[64];
void lock_device_permanently(); void lock_device_permanently();
void ctap_load_external_keys(uint8_t * keybytes);
#endif #endif