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trezor-firmware/legacy/firmware/fsm_msg_coin.h

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2018-09-06 16:28:56 +00:00
/*
* This file is part of the Trezor project, https://trezor.io/
2018-09-06 16:28:56 +00:00
*
* Copyright (C) 2018 Pavol Rusnak <stick@satoshilabs.com>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
void fsm_msgGetPublicKey(const GetPublicKey *msg) {
RESP_INIT(PublicKey);
CHECK_INITIALIZED
CHECK_PIN
InputScriptType script_type =
msg->has_script_type ? msg->script_type : InputScriptType_SPENDADDRESS;
const CoinInfo *coin = fsm_getCoin(msg->has_coin_name, msg->coin_name);
if (!coin) return;
const char *curve = coin->curve_name;
if (msg->has_ecdsa_curve_name) {
curve = msg->ecdsa_curve_name;
}
// XXX note to future developers:
// If more path restrictions are added here, don't forget to also check
// EthereumGetPublicKey in particular for whether it's possible to go around
// the new restrictions that way.
2022-12-27 15:37:38 +00:00
// UnlockPath is required to access SLIP25 paths.
if (msg->address_n_count > 0 && msg->address_n[0] == PATH_SLIP25_PURPOSE) {
// Verify that the desired path lies in the unlocked subtree.
if (msg->address_n[0] != unlock_path) {
fsm_sendFailure(FailureType_Failure_DataError, _("Forbidden key path"));
layoutHome();
return;
}
}
// derive m/0' to obtain root_fingerprint
uint32_t root_fingerprint;
uint32_t path[1] = {PATH_HARDENED | 0};
HDNode *node = fsm_getDerivedNode(curve, path, 1, &root_fingerprint);
if (!node) return;
uint32_t fingerprint;
node = fsm_getDerivedNode(curve, msg->address_n, msg->address_n_count,
&fingerprint);
if (!node) return;
if (hdnode_fill_public_key(node) != 0) {
fsm_sendFailure(FailureType_Failure_ProcessError,
_("Failed to derive public key"));
layoutHome();
return;
}
resp->node.depth = node->depth;
resp->node.fingerprint = fingerprint;
resp->node.child_num = node->child_num;
resp->node.chain_code.size = 32;
memcpy(resp->node.chain_code.bytes, node->chain_code, 32);
resp->node.has_private_key = false;
resp->node.public_key.size = 33;
// For curve25519 and ed25519, the public key has the prefix 0x00, as
// specified by SLIP-10. However, since this prefix is non-standard, it may be
// removed in the future.
memcpy(resp->node.public_key.bytes, node->public_key, 33);
if (coin->xpub_magic && (script_type == InputScriptType_SPENDADDRESS ||
script_type == InputScriptType_SPENDMULTISIG)) {
hdnode_serialize_public(node, fingerprint, coin->xpub_magic, resp->xpub,
sizeof(resp->xpub));
} else if (coin->has_segwit &&
script_type == InputScriptType_SPENDP2SHWITNESS &&
!msg->ignore_xpub_magic && coin->xpub_magic_segwit_p2sh) {
hdnode_serialize_public(node, fingerprint, coin->xpub_magic_segwit_p2sh,
resp->xpub, sizeof(resp->xpub));
} else if (coin->has_segwit &&
script_type == InputScriptType_SPENDP2SHWITNESS &&
msg->ignore_xpub_magic && coin->xpub_magic) {
hdnode_serialize_public(node, fingerprint, coin->xpub_magic, resp->xpub,
sizeof(resp->xpub));
} else if (coin->has_segwit && script_type == InputScriptType_SPENDWITNESS &&
!msg->ignore_xpub_magic && coin->xpub_magic_segwit_native) {
hdnode_serialize_public(node, fingerprint, coin->xpub_magic_segwit_native,
resp->xpub, sizeof(resp->xpub));
} else if (coin->has_segwit && script_type == InputScriptType_SPENDWITNESS &&
msg->ignore_xpub_magic && coin->xpub_magic) {
hdnode_serialize_public(node, fingerprint, coin->xpub_magic, resp->xpub,
sizeof(resp->xpub));
} else if (coin->has_taproot && script_type == InputScriptType_SPENDTAPROOT &&
coin->xpub_magic) {
hdnode_serialize_public(node, fingerprint, coin->xpub_magic, resp->xpub,
sizeof(resp->xpub));
} else {
fsm_sendFailure(FailureType_Failure_DataError,
_("Invalid combination of coin and script_type"));
layoutHome();
return;
}
if (msg->has_show_display && msg->show_display) {
for (int page = 0; page < 2; page++) {
layoutXPUB(resp->xpub, page);
if (!protectButton(ButtonRequestType_ButtonRequest_PublicKey, true)) {
memzero(resp, sizeof(PublicKey));
fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
layoutHome();
return;
}
}
}
resp->has_root_fingerprint = true;
resp->root_fingerprint = root_fingerprint;
msg_write(MessageType_MessageType_PublicKey, resp);
layoutHome();
}
static PathSchema fsm_getUnlockedSchema(MessageType message_type) {
if (message_type == MessageType_MessageType_AuthorizeCoinJoin) {
// Grant full access to SLIP-25 account.
return SCHEMA_SLIP25_TAPROOT;
}
if (authorization_type == MessageType_MessageType_AuthorizeCoinJoin) {
const AuthorizeCoinJoin *authorization = config_getCoinJoinAuthorization();
if (authorization == NULL ||
authorization->address_n[0] != PATH_SLIP25_PURPOSE) {
return SCHEMA_NONE;
}
// SLIP-25 access unlocked.
} else if (unlock_path == PATH_SLIP25_PURPOSE) {
// SLIP-25 access unlocked.
} else {
return SCHEMA_NONE;
}
switch (message_type) {
case MessageType_MessageType_GetOwnershipProof:
case MessageType_MessageType_SignTx:
// Grant full access to SLIP-25 account.
return SCHEMA_SLIP25_TAPROOT;
default:
// Grant access to SLIP-25 account's external chain.
return SCHEMA_SLIP25_TAPROOT_EXTERNAL;
}
}
void fsm_msgSignTx(const SignTx *msg) {
CHECK_INITIALIZED
CHECK_PARAM(msg->inputs_count > 0,
_("Transaction must have at least one input"));
CHECK_PARAM(msg->outputs_count > 0,
_("Transaction must have at least one output"));
CHECK_PARAM(msg->inputs_count + msg->outputs_count >= msg->inputs_count,
_("Value overflow"));
const AuthorizeCoinJoin *authorization = NULL;
if (authorization_type == MessageType_MessageType_AuthorizeCoinJoin) {
authorization = config_getCoinJoinAuthorization();
if (authorization == NULL) {
return;
}
} else {
CHECK_PIN
}
PathSchema unlock = fsm_getUnlockedSchema(MessageType_MessageType_SignTx);
const CoinInfo *coin = fsm_getCoin(msg->has_coin_name, msg->coin_name);
if (!coin) return;
CHECK_PARAM((coin->decred || coin->overwintered) || !msg->has_expiry,
_("Expiry not enabled on this coin."))
CHECK_PARAM(coin->timestamp || !msg->has_timestamp,
_("Timestamp not enabled on this coin."))
CHECK_PARAM(!coin->timestamp || msg->timestamp, _("Timestamp must be set."))
const HDNode *node = fsm_getDerivedNode(coin->curve_name, NULL, 0, NULL);
if (!node) return;
signing_init(msg, coin, node, authorization, unlock);
}
void fsm_msgTxAck(TxAck *msg) {
if (!signing_is_preauthorized()) {
CHECK_UNLOCKED
}
CHECK_PARAM(msg->has_tx, _("No transaction provided"));
signing_txack(&(msg->tx));
}
bool fsm_checkCoinPath(const CoinInfo *coin, InputScriptType script_type,
uint32_t address_n_count, const uint32_t *address_n,
bool has_multisig, MessageType message_type,
bool show_warning) {
PathSchema unlock = fsm_getUnlockedSchema(message_type);
if (coin_path_check(coin, script_type, address_n_count, address_n,
has_multisig, unlock, true)) {
return true;
}
if (config_getSafetyCheckLevel() == SafetyCheckLevel_Strict &&
!coin_path_check(coin, script_type, address_n_count, address_n,
has_multisig, unlock, false)) {
fsm_sendFailure(FailureType_Failure_DataError, _("Forbidden key path"));
return false;
}
if (show_warning) {
return fsm_layoutPathWarning();
}
return true;
}
bool fsm_checkScriptType(const CoinInfo *coin, InputScriptType script_type) {
if (!is_internal_input_script_type(script_type)) {
fsm_sendFailure(FailureType_Failure_DataError, _("Invalid script type"));
return false;
}
if (is_segwit_input_script_type(script_type) && !coin->has_segwit) {
fsm_sendFailure(FailureType_Failure_DataError,
_("Segwit not enabled on this coin"));
return false;
}
if (script_type == InputScriptType_SPENDTAPROOT && !coin->has_taproot) {
fsm_sendFailure(FailureType_Failure_DataError,
_("Taproot not enabled on this coin"));
return false;
}
return true;
}
void fsm_msgGetAddress(const GetAddress *msg) {
RESP_INIT(Address);
CHECK_INITIALIZED
CHECK_PIN
const CoinInfo *coin = fsm_getCoin(msg->has_coin_name, msg->coin_name);
if (!coin) return;
if (!fsm_checkCoinPath(coin, msg->script_type, msg->address_n_count,
msg->address_n, msg->has_multisig,
MessageType_MessageType_GetAddress,
msg->show_display)) {
layoutHome();
return;
}
HDNode *node = fsm_getDerivedNode(coin->curve_name, msg->address_n,
msg->address_n_count, NULL);
if (!node) return;
if (hdnode_fill_public_key(node) != 0) {
fsm_sendFailure(FailureType_Failure_ProcessError,
_("Failed to derive public key"));
layoutHome();
return;
}
char address[MAX_ADDR_SIZE];
if (msg->has_multisig) { // use progress bar only for multisig
layoutProgress(_("Computing address"), 0);
}
if (!compute_address(coin, msg->script_type, node, msg->has_multisig,
&msg->multisig, address)) {
fsm_sendFailure(FailureType_Failure_DataError, _("Can't encode address"));
layoutHome();
return;
}
if (msg->has_show_display && msg->show_display) {
char desc[20] = {0};
int multisig_index = 0;
if (msg->has_multisig) {
strlcpy(desc, "Multisig __ of __:", sizeof(desc));
const uint32_t m = msg->multisig.m;
const uint32_t n = cryptoMultisigPubkeyCount(&(msg->multisig));
desc[9] = (m < 10) ? ' ' : ('0' + (m / 10));
desc[10] = '0' + (m % 10);
desc[15] = (n < 10) ? ' ' : ('0' + (n / 10));
desc[16] = '0' + (n % 10);
multisig_index =
cryptoMultisigPubkeyIndex(coin, &(msg->multisig), node->public_key);
} else {
strlcpy(desc, _("Address:"), sizeof(desc));
}
uint32_t multisig_xpub_magic = coin->xpub_magic;
if (msg->has_multisig && coin->has_segwit) {
if (!msg->has_ignore_xpub_magic || !msg->ignore_xpub_magic) {
if (msg->script_type == InputScriptType_SPENDWITNESS &&
coin->xpub_magic_segwit_native) {
multisig_xpub_magic = coin->xpub_magic_segwit_native;
} else if (msg->script_type == InputScriptType_SPENDP2SHWITNESS &&
coin->xpub_magic_segwit_p2sh) {
multisig_xpub_magic = coin->xpub_magic_segwit_p2sh;
}
}
}
bool is_cashaddr = coin->cashaddr_prefix != NULL;
if (!fsm_layoutAddress(address, desc, is_cashaddr,
is_cashaddr ? strlen(coin->cashaddr_prefix) + 1 : 0,
msg->address_n, msg->address_n_count, false,
msg->has_multisig ? &(msg->multisig) : NULL,
multisig_index, multisig_xpub_magic, coin)) {
return;
}
}
strlcpy(resp->address, address, sizeof(resp->address));
msg_write(MessageType_MessageType_Address, resp);
layoutHome();
}
void fsm_msgSignMessage(const SignMessage *msg) {
// CHECK_PARAM(is_ascii_only(msg->message.bytes, msg->message.size), _("Cannot
// sign non-ASCII strings"));
RESP_INIT(MessageSignature);
CHECK_INITIALIZED
CHECK_PIN
const CoinInfo *coin = fsm_getCoin(msg->has_coin_name, msg->coin_name);
if (!coin) return;
if (!fsm_checkCoinPath(coin, msg->script_type, msg->address_n_count,
msg->address_n, false,
MessageType_MessageType_SignMessage, true)) {
layoutHome();
return;
}
HDNode *node = fsm_getDerivedNode(coin->curve_name, msg->address_n,
msg->address_n_count, NULL);
if (!node) return;
if (hdnode_fill_public_key(node) != 0) {
fsm_sendFailure(FailureType_Failure_ProcessError,
_("Failed to derive public key"));
layoutHome();
return;
}
if (!compute_address(coin, msg->script_type, node, false, NULL,
resp->address)) {
fsm_sendFailure(FailureType_Failure_ProcessError,
_("Error computing address"));
layoutHome();
return;
}
layoutVerifyAddress(coin, resp->address);
if (!protectButton(ButtonRequestType_ButtonRequest_Other, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
layoutHome();
return;
}
if (!fsm_layoutSignMessage(msg->message.bytes, msg->message.size)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
layoutHome();
return;
}
layoutProgressSwipe(_("Signing"), 0);
if (cryptoMessageSign(coin, node, msg->script_type, msg->no_script_type,
msg->message.bytes, msg->message.size,
resp->signature.bytes) == 0) {
resp->signature.size = 65;
msg_write(MessageType_MessageType_MessageSignature, resp);
} else {
fsm_sendFailure(FailureType_Failure_ProcessError,
_("Error signing message"));
}
layoutHome();
}
void fsm_msgVerifyMessage(const VerifyMessage *msg) {
const CoinInfo *coin = fsm_getCoin(msg->has_coin_name, msg->coin_name);
if (!coin) return;
layoutProgressSwipe(_("Verifying"), 0);
if (msg->signature.size != 65) {
fsm_sendFailure(FailureType_Failure_ProcessError, _("Invalid signature"));
layoutHome();
return;
}
int result = cryptoMessageVerify(coin, msg->message.bytes, msg->message.size,
msg->address, msg->signature.bytes);
if (result == 0) {
layoutVerifyAddress(coin, msg->address);
if (!protectButton(ButtonRequestType_ButtonRequest_Other, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
layoutHome();
return;
}
if (!fsm_layoutVerifyMessage(msg->message.bytes, msg->message.size)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
layoutHome();
return;
}
layoutDialogSwipe(&bmp_icon_ok, NULL, _("Continue"), NULL, NULL,
_("The signature is valid."), NULL, NULL, NULL, NULL);
if (!protectButton(ButtonRequestType_ButtonRequest_Other, true)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
layoutHome();
return;
}
fsm_sendSuccess(_("Message verified"));
} else if (result == 1) {
fsm_sendFailure(FailureType_Failure_DataError, _("Invalid address"));
} else {
fsm_sendFailure(FailureType_Failure_ProcessError, _("Invalid signature"));
}
layoutHome();
}
bool fsm_getOwnershipId(uint8_t *script_pubkey, size_t script_pubkey_size,
uint8_t ownership_id[OWNERSHIP_ID_SIZE]) {
const char *OWNERSHIP_ID_KEY_PATH[] = {"SLIP-0019",
"Ownership identification key"};
uint8_t ownership_id_key[32] = {0};
if (!fsm_getSlip21Key(OWNERSHIP_ID_KEY_PATH, 2, ownership_id_key)) {
return false;
}
hmac_sha256(ownership_id_key, sizeof(ownership_id_key), script_pubkey,
script_pubkey_size, ownership_id);
return true;
}
void fsm_msgGetOwnershipId(const GetOwnershipId *msg) {
RESP_INIT(OwnershipId);
CHECK_INITIALIZED
CHECK_PIN
const CoinInfo *coin = fsm_getCoin(msg->has_coin_name, msg->coin_name);
if (!coin) return;
if (!fsm_checkCoinPath(coin, msg->script_type, msg->address_n_count,
msg->address_n, msg->has_multisig,
MessageType_MessageType_GetOwnershipId, false)) {
layoutHome();
return;
}
if (!fsm_checkScriptType(coin, msg->script_type)) {
layoutHome();
return;
}
HDNode *node = fsm_getDerivedNode(coin->curve_name, msg->address_n,
msg->address_n_count, NULL);
if (!node) return;
uint8_t script_pubkey[520] = {0};
pb_size_t script_pubkey_size = 0;
if (!get_script_pubkey(coin, node, msg->has_multisig, &msg->multisig,
msg->script_type, script_pubkey,
&script_pubkey_size)) {
fsm_sendFailure(FailureType_Failure_ProcessError,
_("Failed to derive scriptPubKey"));
layoutHome();
return;
}
if (!fsm_getOwnershipId(script_pubkey, script_pubkey_size,
resp->ownership_id.bytes)) {
return;
}
resp->ownership_id.size = 32;
msg_write(MessageType_MessageType_OwnershipId, resp);
layoutHome();
}
void fsm_msgGetOwnershipProof(const GetOwnershipProof *msg) {
RESP_INIT(OwnershipProof);
CHECK_INITIALIZED
const CoinInfo *coin = fsm_getCoin(msg->has_coin_name, msg->coin_name);
if (!coin) return;
const AuthorizeCoinJoin *authorization = NULL;
if (authorization_type == MessageType_MessageType_AuthorizeCoinJoin) {
authorization = config_getCoinJoinAuthorization();
if (authorization == NULL) {
return;
}
// Check whether the authorization matches the parameters of the request.
size_t coordinator_len = strlen(authorization->coordinator);
if (msg->address_n_count !=
authorization->address_n_count + BIP32_WALLET_DEPTH ||
memcmp(msg->address_n, authorization->address_n,
sizeof(uint32_t) * authorization->address_n_count) != 0 ||
strcmp(msg->coin_name, authorization->coin_name) != 0 ||
msg->script_type != authorization->script_type ||
msg->commitment_data.size < coordinator_len + 1 ||
msg->commitment_data.bytes[0] != coordinator_len ||
memcmp(msg->commitment_data.bytes + 1, authorization->coordinator,
coordinator_len) != 0) {
fsm_sendFailure(FailureType_Failure_ProcessError,
_("Unauthorized operation"));
layoutHome();
return;
}
} else {
CHECK_PIN
if (!fsm_checkCoinPath(coin, msg->script_type, msg->address_n_count,
msg->address_n, msg->has_multisig,
MessageType_MessageType_GetOwnershipProof, false)) {
layoutHome();
return;
}
}
if (msg->has_multisig) {
// The legacy implementation currently only supports singlesig native segwit
// v0 and v1, the bare minimum for CoinJoin.
fsm_sendFailure(FailureType_Failure_DataError,
_("Multisig not supported."));
layoutHome();
return;
}
if (!fsm_checkScriptType(coin, msg->script_type)) {
layoutHome();
return;
}
HDNode *node = fsm_getDerivedNode(coin->curve_name, msg->address_n,
msg->address_n_count, NULL);
if (!node) return;
uint8_t script_pubkey[520] = {0};
pb_size_t script_pubkey_size = 0;
if (!get_script_pubkey(coin, node, msg->has_multisig, &msg->multisig,
msg->script_type, script_pubkey,
&script_pubkey_size)) {
fsm_sendFailure(FailureType_Failure_ProcessError,
_("Failed to derive scriptPubKey"));
layoutHome();
return;
}
uint8_t ownership_id[OWNERSHIP_ID_SIZE] = {0};
if (!fsm_getOwnershipId(script_pubkey, script_pubkey_size, ownership_id)) {
return;
}
// Providing an ownership ID is optional in case of singlesig, but if one is
// provided, then it should match.
if (msg->ownership_ids_count) {
if (msg->ownership_ids_count != 1 ||
msg->ownership_ids[0].size != sizeof(ownership_id) ||
memcmp(ownership_id, msg->ownership_ids[0].bytes,
sizeof(ownership_id)) != 0) {
fsm_sendFailure(FailureType_Failure_DataError,
_("Invalid ownership identifier"));
layoutHome();
return;
}
}
// In order to set the "user confirmation" bit in the proof, the user must
// actually confirm.
uint8_t flags = msg->user_confirmation;
if (!authorization && msg->user_confirmation) {
layoutConfirmOwnershipProof();
if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
layoutHome();
return;
}
if (msg->has_commitment_data) {
if (!fsm_layoutCommitmentData(msg->commitment_data.bytes,
msg->commitment_data.size)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
layoutHome();
return;
}
}
}
if (!get_ownership_proof(coin, msg->script_type, node, flags, ownership_id,
script_pubkey, script_pubkey_size,
msg->commitment_data.bytes,
msg->commitment_data.size, resp)) {
fsm_sendFailure(FailureType_Failure_ProcessError, _("Signing failed"));
layoutHome();
return;
}
msg_write(MessageType_MessageType_OwnershipProof, resp);
layoutHome();
}
void fsm_msgAuthorizeCoinJoin(const AuthorizeCoinJoin *msg) {
CHECK_INITIALIZED
CHECK_PIN
const size_t MAX_COORDINATOR_LEN = 36;
const uint64_t MAX_ROUNDS = 500;
const uint64_t MAX_COORDINATOR_FEE_RATE = 5 * FEE_RATE_DECIMALS; // 5 %
const CoinInfo *coin = fsm_getCoin(msg->has_coin_name, msg->coin_name);
if (!coin) {
return;
}
if (strnlen(msg->coordinator, sizeof(msg->coordinator)) >
MAX_COORDINATOR_LEN) {
fsm_sendFailure(FailureType_Failure_DataError,
_("Invalid coordinator name."));
layoutHome();
return;
}
for (size_t i = 0; msg->coordinator[i] != '\0'; ++i) {
if (msg->coordinator[i] < 32 || msg->coordinator[i] > 126) {
fsm_sendFailure(FailureType_Failure_DataError,
_("Invalid coordinator name."));
layoutHome();
return;
}
}
if (msg->max_rounds < 1) {
fsm_sendFailure(FailureType_Failure_DataError,
_("Invalid number of rounds."));
layoutHome();
return;
}
bool safety_checks_is_strict =
(config_getSafetyCheckLevel() == SafetyCheckLevel_Strict);
if (msg->max_rounds > MAX_ROUNDS && safety_checks_is_strict) {
fsm_sendFailure(FailureType_Failure_DataError,
_("The number of rounds is unexpectedly large."));
layoutHome();
return;
}
if (msg->max_coordinator_fee_rate > MAX_COORDINATOR_FEE_RATE &&
safety_checks_is_strict) {
fsm_sendFailure(FailureType_Failure_DataError,
_("The coordination fee rate is unexpectedly large."));
layoutHome();
return;
}
if (msg->max_fee_per_kvbyte > 10 * coin->maxfee_kb &&
safety_checks_is_strict) {
fsm_sendFailure(FailureType_Failure_DataError,
_("The fee per vbyte is unexpectedly large."));
layoutHome();
return;
}
if (msg->address_n_count == 0) {
fsm_sendFailure(FailureType_Failure_DataError,
_("Empty path not allowed."));
layoutHome();
return;
}
if (msg->address_n[0] != PATH_SLIP25_PURPOSE && safety_checks_is_strict) {
fsm_sendFailure(FailureType_Failure_DataError, _("Forbidden key path."));
layoutHome();
return;
}
layoutAuthorizeCoinJoin(coin, msg->max_rounds, msg->max_fee_per_kvbyte);
if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
layoutHome();
return;
}
bool path_warning_shown = false;
if (msg->address_n[0] != PATH_SLIP25_PURPOSE) {
if (!fsm_layoutPathWarning()) {
layoutHome();
return;
}
path_warning_shown = true;
}
// AuthorizeCoinJoin contains only the path prefix without change and index.
if ((size_t)(msg->address_n_count + 2) >
sizeof(msg->address_n) / sizeof(msg->address_n[0])) {
fsm_sendFailure(FailureType_Failure_DataError, _("Forbidden key path."));
layoutHome();
return;
}
if (!fsm_checkCoinPath(coin, msg->script_type, msg->address_n_count + 2,
msg->address_n, false,
MessageType_MessageType_AuthorizeCoinJoin,
!path_warning_shown)) {
layoutHome();
return;
}
if (msg->max_fee_per_kvbyte > coin->maxfee_kb) {
layoutFeeRateOverThreshold(coin, msg->max_fee_per_kvbyte);
if (!protectButton(ButtonRequestType_ButtonRequest_FeeOverThreshold,
false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
layoutHome();
return;
}
}
// Cache the seed.
if (config_getSeed() == NULL) {
layoutHome();
return;
}
if (!config_setCoinJoinAuthorization(msg)) {
layoutHome();
return;
}
fsm_sendSuccess(_("Coinjoin authorized"));
layoutHome();
}
void fsm_msgCancelAuthorization(const CancelAuthorization *msg) {
(void)msg;
if (!config_setCoinJoinAuthorization(NULL)) {
layoutHome();
return;
}
fsm_sendSuccess(_("Authorization cancelled"));
layoutHome();
}
void fsm_msgDoPreauthorized(const DoPreauthorized *msg) {
(void)msg;
RESP_INIT(PreauthorizedRequest);
CHECK_INITIALIZED
authorization_type = config_getAuthorizationType();
if (authorization_type == 0) {
fsm_sendFailure(FailureType_Failure_ProcessError,
_("No preauthorized operation"));
layoutHome();
return;
}
msg_write(MessageType_MessageType_PreauthorizedRequest, resp);
layoutHome();
}
2022-12-27 15:37:38 +00:00
void fsm_msgUnlockPath(const UnlockPath *msg) {
(void)msg;
RESP_INIT(UnlockedPathRequest);
CHECK_INITIALIZED
CHECK_PIN
const char *KEYCHAIN_MAC_KEY_PATH[] = {"TREZOR", "Keychain MAC key"};
// UnlockPath is relevant only for SLIP-25 paths.
// Note: Currently we only allow unlocking the entire SLIP-25 purpose subtree
// instead of per-coin or per-account unlocking in order to avoid UI
// complexity.
if (msg->address_n_count != 1 || msg->address_n[0] != PATH_SLIP25_PURPOSE) {
fsm_sendFailure(FailureType_Failure_DataError, _("Invalid path"));
layoutHome();
return;
}
uint8_t keychain_mac_key[32] = {0};
if (!fsm_getSlip21Key(KEYCHAIN_MAC_KEY_PATH, 2, keychain_mac_key)) {
return;
}
HMAC_SHA256_CTX hctx;
hmac_sha256_Init(&hctx, keychain_mac_key, sizeof(keychain_mac_key));
for (size_t i = 0; i < msg->address_n_count; ++i) {
hmac_sha256_Update(&hctx, (const uint8_t *)&msg->address_n[i],
sizeof(uint32_t));
}
hmac_sha256_Final(&hctx, resp->mac.bytes);
// Require confirmation to access SLIP25 paths unless already authorized.
if (msg->has_mac) {
uint8_t diff = 0;
for (size_t i = 0; i < SHA256_DIGEST_LENGTH; i++) {
diff |= (msg->mac.bytes[i] - resp->mac.bytes[i]);
}
if (msg->mac.size != SHA256_DIGEST_LENGTH || diff != 0) {
fsm_sendFailure(FailureType_Failure_DataError, _("Invalid MAC"));
layoutHome();
return;
}
} else {
layoutConfirmCoinjoinAccess();
if (!protectButton(ButtonRequestType_ButtonRequest_Other, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
layoutHome();
return;
}
}
unlock_path = msg->address_n[0];
resp->mac.size = SHA256_DIGEST_LENGTH;
resp->has_mac = true;
msg_write(MessageType_MessageType_UnlockedPathRequest, resp);
layoutHome();
}