mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-15 20:19:23 +00:00
370 lines
13 KiB
C
370 lines
13 KiB
C
/*
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* This file is part of the Trezor project, https://trezor.io/
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*
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* Copyright (C) 2018 Pavol Rusnak <stick@satoshilabs.com>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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void fsm_msgGetPublicKey(const GetPublicKey *msg) {
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RESP_INIT(PublicKey);
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CHECK_INITIALIZED
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CHECK_PIN
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InputScriptType script_type =
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msg->has_script_type ? msg->script_type : InputScriptType_SPENDADDRESS;
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const CoinInfo *coin = fsm_getCoin(msg->has_coin_name, msg->coin_name);
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if (!coin) return;
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const char *curve = coin->curve_name;
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if (msg->has_ecdsa_curve_name) {
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curve = msg->ecdsa_curve_name;
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}
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// derive m/0' to obtain root_fingerprint
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uint32_t root_fingerprint;
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uint32_t path[1] = {PATH_HARDENED | 0};
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HDNode *node = fsm_getDerivedNode(curve, path, 1, &root_fingerprint);
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if (!node) return;
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uint32_t fingerprint;
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node = fsm_getDerivedNode(curve, msg->address_n, msg->address_n_count,
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&fingerprint);
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if (!node) return;
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if (hdnode_fill_public_key(node) != 0) {
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fsm_sendFailure(FailureType_Failure_ProcessError,
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_("Failed to derive public key"));
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layoutHome();
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return;
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}
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resp->node.depth = node->depth;
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resp->node.fingerprint = fingerprint;
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resp->node.child_num = node->child_num;
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resp->node.chain_code.size = 32;
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memcpy(resp->node.chain_code.bytes, node->chain_code, 32);
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resp->node.has_private_key = false;
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resp->node.public_key.size = 33;
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memcpy(resp->node.public_key.bytes, node->public_key, 33);
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if (node->public_key[0] == 1) {
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/* ed25519 public key */
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resp->node.public_key.bytes[0] = 0;
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}
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if (coin->xpub_magic && (script_type == InputScriptType_SPENDADDRESS ||
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script_type == InputScriptType_SPENDMULTISIG)) {
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hdnode_serialize_public(node, fingerprint, coin->xpub_magic, resp->xpub,
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sizeof(resp->xpub));
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} else if (coin->has_segwit &&
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script_type == InputScriptType_SPENDP2SHWITNESS &&
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!msg->ignore_xpub_magic && coin->xpub_magic_segwit_p2sh) {
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hdnode_serialize_public(node, fingerprint, coin->xpub_magic_segwit_p2sh,
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resp->xpub, sizeof(resp->xpub));
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} else if (coin->has_segwit &&
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script_type == InputScriptType_SPENDP2SHWITNESS &&
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msg->ignore_xpub_magic && coin->xpub_magic) {
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hdnode_serialize_public(node, fingerprint, coin->xpub_magic, resp->xpub,
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sizeof(resp->xpub));
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} else if (coin->has_segwit && script_type == InputScriptType_SPENDWITNESS &&
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!msg->ignore_xpub_magic && coin->xpub_magic_segwit_native) {
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hdnode_serialize_public(node, fingerprint, coin->xpub_magic_segwit_native,
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resp->xpub, sizeof(resp->xpub));
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} else if (coin->has_segwit && script_type == InputScriptType_SPENDWITNESS &&
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msg->ignore_xpub_magic && coin->xpub_magic) {
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hdnode_serialize_public(node, fingerprint, coin->xpub_magic, resp->xpub,
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sizeof(resp->xpub));
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} else if (coin->has_taproot && script_type == InputScriptType_SPENDTAPROOT &&
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coin->xpub_magic) {
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hdnode_serialize_public(node, fingerprint, coin->xpub_magic, resp->xpub,
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sizeof(resp->xpub));
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} else {
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fsm_sendFailure(FailureType_Failure_DataError,
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_("Invalid combination of coin and script_type"));
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layoutHome();
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return;
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}
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if (msg->has_show_display && msg->show_display) {
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for (int page = 0; page < 2; page++) {
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layoutXPUB(resp->xpub, page);
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if (!protectButton(ButtonRequestType_ButtonRequest_PublicKey, true)) {
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memzero(resp, sizeof(PublicKey));
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fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
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layoutHome();
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return;
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}
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}
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}
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resp->has_root_fingerprint = true;
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resp->root_fingerprint = root_fingerprint;
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msg_write(MessageType_MessageType_PublicKey, resp);
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layoutHome();
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}
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void fsm_msgSignTx(const SignTx *msg) {
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CHECK_INITIALIZED
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CHECK_PARAM(msg->inputs_count > 0,
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_("Transaction must have at least one input"));
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CHECK_PARAM(msg->outputs_count > 0,
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_("Transaction must have at least one output"));
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CHECK_PARAM(msg->inputs_count + msg->outputs_count >= msg->inputs_count,
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_("Value overflow"));
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CHECK_PIN
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const CoinInfo *coin = fsm_getCoin(msg->has_coin_name, msg->coin_name);
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if (!coin) return;
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CHECK_PARAM((coin->decred || coin->overwintered) || !msg->has_expiry,
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_("Expiry not enabled on this coin."))
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CHECK_PARAM(coin->timestamp || !msg->has_timestamp,
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_("Timestamp not enabled on this coin."))
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CHECK_PARAM(!coin->timestamp || msg->timestamp, _("Timestamp must be set."))
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const HDNode *node = fsm_getDerivedNode(coin->curve_name, NULL, 0, NULL);
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if (!node) return;
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signing_init(msg, coin, node);
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}
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void fsm_msgTxAck(TxAck *msg) {
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CHECK_UNLOCKED
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CHECK_PARAM(msg->has_tx, _("No transaction provided"));
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signing_txack(&(msg->tx));
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}
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bool fsm_checkCoinPath(const CoinInfo *coin, InputScriptType script_type,
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uint32_t address_n_count, const uint32_t *address_n,
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bool has_multisig, bool show_warning) {
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if (coin_path_check(coin, script_type, address_n_count, address_n,
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has_multisig, true)) {
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return true;
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}
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if (config_getSafetyCheckLevel() == SafetyCheckLevel_Strict &&
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!coin_path_check(coin, script_type, address_n_count, address_n,
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has_multisig, false)) {
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fsm_sendFailure(FailureType_Failure_DataError, _("Forbidden key path"));
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return false;
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}
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if (show_warning) {
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return fsm_layoutPathWarning();
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}
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return true;
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}
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void fsm_msgGetAddress(const GetAddress *msg) {
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RESP_INIT(Address);
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CHECK_INITIALIZED
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CHECK_PIN
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const CoinInfo *coin = fsm_getCoin(msg->has_coin_name, msg->coin_name);
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if (!coin) return;
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if (!fsm_checkCoinPath(coin, msg->script_type, msg->address_n_count,
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msg->address_n, msg->has_multisig,
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msg->show_display)) {
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layoutHome();
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return;
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}
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HDNode *node = fsm_getDerivedNode(coin->curve_name, msg->address_n,
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msg->address_n_count, NULL);
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if (!node) return;
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if (hdnode_fill_public_key(node) != 0) {
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fsm_sendFailure(FailureType_Failure_ProcessError,
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_("Failed to derive public key"));
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layoutHome();
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return;
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}
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char address[MAX_ADDR_SIZE];
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if (msg->has_multisig) { // use progress bar only for multisig
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layoutProgress(_("Computing address"), 0);
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}
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if (!compute_address(coin, msg->script_type, node, msg->has_multisig,
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&msg->multisig, address)) {
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fsm_sendFailure(FailureType_Failure_DataError, _("Can't encode address"));
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layoutHome();
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return;
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}
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if (msg->has_show_display && msg->show_display) {
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char desc[20] = {0};
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int multisig_index = 0;
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if (msg->has_multisig) {
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strlcpy(desc, "Multisig __ of __:", sizeof(desc));
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const uint32_t m = msg->multisig.m;
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const uint32_t n = cryptoMultisigPubkeyCount(&(msg->multisig));
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desc[9] = (m < 10) ? ' ' : ('0' + (m / 10));
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desc[10] = '0' + (m % 10);
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desc[15] = (n < 10) ? ' ' : ('0' + (n / 10));
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desc[16] = '0' + (n % 10);
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multisig_index =
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cryptoMultisigPubkeyIndex(coin, &(msg->multisig), node->public_key);
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} else {
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strlcpy(desc, _("Address:"), sizeof(desc));
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}
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uint32_t multisig_xpub_magic = coin->xpub_magic;
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if (msg->has_multisig && coin->has_segwit) {
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if (!msg->has_ignore_xpub_magic || !msg->ignore_xpub_magic) {
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if (msg->script_type == InputScriptType_SPENDWITNESS &&
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coin->xpub_magic_segwit_native) {
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multisig_xpub_magic = coin->xpub_magic_segwit_native;
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} else if (msg->script_type == InputScriptType_SPENDP2SHWITNESS &&
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coin->xpub_magic_segwit_p2sh) {
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multisig_xpub_magic = coin->xpub_magic_segwit_p2sh;
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}
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}
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}
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bool is_cashaddr = coin->cashaddr_prefix != NULL;
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bool is_bech32 = msg->script_type == InputScriptType_SPENDWITNESS ||
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msg->script_type == InputScriptType_SPENDTAPROOT;
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if (!fsm_layoutAddress(address, desc, is_cashaddr || is_bech32,
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is_cashaddr ? strlen(coin->cashaddr_prefix) + 1 : 0,
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msg->address_n, msg->address_n_count, false,
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msg->has_multisig ? &(msg->multisig) : NULL,
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multisig_index, multisig_xpub_magic, coin)) {
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return;
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}
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}
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strlcpy(resp->address, address, sizeof(resp->address));
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msg_write(MessageType_MessageType_Address, resp);
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layoutHome();
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}
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void fsm_msgSignMessage(const SignMessage *msg) {
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// CHECK_PARAM(is_ascii_only(msg->message.bytes, msg->message.size), _("Cannot
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// sign non-ASCII strings"));
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RESP_INIT(MessageSignature);
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CHECK_INITIALIZED
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CHECK_PIN
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const CoinInfo *coin = fsm_getCoin(msg->has_coin_name, msg->coin_name);
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if (!coin) return;
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if (!fsm_checkCoinPath(coin, msg->script_type, msg->address_n_count,
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msg->address_n, false, true)) {
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layoutHome();
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return;
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}
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HDNode *node = fsm_getDerivedNode(coin->curve_name, msg->address_n,
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msg->address_n_count, NULL);
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if (!node) return;
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if (hdnode_fill_public_key(node) != 0) {
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fsm_sendFailure(FailureType_Failure_ProcessError,
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_("Failed to derive public key"));
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layoutHome();
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return;
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}
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if (!compute_address(coin, msg->script_type, node, false, NULL,
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resp->address)) {
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fsm_sendFailure(FailureType_Failure_ProcessError,
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_("Error computing address"));
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layoutHome();
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return;
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}
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layoutVerifyAddress(coin, resp->address);
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if (!protectButton(ButtonRequestType_ButtonRequest_Other, false)) {
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fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
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layoutHome();
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return;
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}
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if (!fsm_layoutSignMessage(msg->message.bytes, msg->message.size)) {
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fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
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layoutHome();
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return;
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}
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layoutProgressSwipe(_("Signing"), 0);
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if (cryptoMessageSign(coin, node, msg->script_type, msg->no_script_type,
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msg->message.bytes, msg->message.size,
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resp->signature.bytes) == 0) {
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resp->signature.size = 65;
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msg_write(MessageType_MessageType_MessageSignature, resp);
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} else {
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fsm_sendFailure(FailureType_Failure_ProcessError,
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_("Error signing message"));
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}
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layoutHome();
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}
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void fsm_msgVerifyMessage(const VerifyMessage *msg) {
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const CoinInfo *coin = fsm_getCoin(msg->has_coin_name, msg->coin_name);
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if (!coin) return;
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layoutProgressSwipe(_("Verifying"), 0);
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if (msg->signature.size != 65) {
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fsm_sendFailure(FailureType_Failure_ProcessError, _("Invalid signature"));
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layoutHome();
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return;
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}
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int result = cryptoMessageVerify(coin, msg->message.bytes, msg->message.size,
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msg->address, msg->signature.bytes);
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if (result == 0) {
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layoutVerifyAddress(coin, msg->address);
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if (!protectButton(ButtonRequestType_ButtonRequest_Other, false)) {
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fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
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layoutHome();
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return;
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}
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if (!fsm_layoutVerifyMessage(msg->message.bytes, msg->message.size)) {
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fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
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layoutHome();
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return;
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}
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layoutDialogSwipe(&bmp_icon_ok, NULL, _("Continue"), NULL, NULL,
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_("The signature is valid."), NULL, NULL, NULL, NULL);
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if (!protectButton(ButtonRequestType_ButtonRequest_Other, true)) {
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fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
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layoutHome();
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return;
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}
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fsm_sendSuccess(_("Message verified"));
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} else if (result == 1) {
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fsm_sendFailure(FailureType_Failure_DataError, _("Invalid address"));
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} else {
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fsm_sendFailure(FailureType_Failure_ProcessError, _("Invalid signature"));
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}
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layoutHome();
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}
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