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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/
*
* 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;
}
uint32_t fingerprint;
HDNode *node = node = fsm_getDerivedNode(curve, msg->address_n,
msg->address_n_count, &fingerprint);
if (!node) return;
hdnode_fill_public_key(node);
if (msg->has_show_display && msg->show_display) {
layoutPublicKey(node->public_key);
if (!protectButton(ButtonRequestType_ButtonRequest_PublicKey, true)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
layoutHome();
return;
}
}
resp->has_node = true;
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.has_public_key = true;
resp->node.public_key.size = 33;
memcpy(resp->node.public_key.bytes, node->public_key, 33);
if (node->public_key[0] == 1) {
/* ed25519 public key */
resp->node.public_key.bytes[0] = 0;
}
resp->has_xpub = true;
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 && coin->xpub_magic_segwit_p2sh &&
script_type == InputScriptType_SPENDP2SHWITNESS) {
hdnode_serialize_public(node, fingerprint, coin->xpub_magic_segwit_p2sh,
resp->xpub, sizeof(resp->xpub));
} else if (coin->has_segwit && coin->xpub_magic_segwit_native &&
script_type == InputScriptType_SPENDWITNESS) {
hdnode_serialize_public(node, fingerprint, coin->xpub_magic_segwit_native,
resp->xpub, sizeof(resp->xpub));
} else {
fsm_sendFailure(FailureType_Failure_DataError,
_("Invalid combination of coin and script_type"));
layoutHome();
return;
}
msg_write(MessageType_MessageType_PublicKey, resp);
layoutHome();
}
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"));
CHECK_PIN
const CoinInfo *coin = fsm_getCoin(msg->has_coin_name, msg->coin_name);
if (!coin) return;
const HDNode *node = fsm_getDerivedNode(coin->curve_name, NULL, 0, NULL);
if (!node) return;
signing_init(msg, coin, node);
}
void fsm_msgTxAck(TxAck *msg) {
CHECK_PARAM(msg->has_tx, _("No transaction provided"));
signing_txack(&(msg->tx));
}
static bool path_mismatched(const CoinInfo *coin, const GetAddress *msg) {
bool mismatch = false;
// m : no path
if (msg->address_n_count == 0) {
return false;
}
// m/44' : BIP44 Legacy
// m / purpose' / coin_type' / account' / change / address_index
if (msg->address_n[0] == (0x80000000 + 44)) {
mismatch |= (msg->script_type != InputScriptType_SPENDADDRESS);
mismatch |= (msg->address_n_count != 5);
mismatch |= (msg->address_n[1] != coin->coin_type);
mismatch |= (msg->address_n[2] & 0x80000000) == 0;
mismatch |= (msg->address_n[3] & 0x80000000) == 0x80000000;
mismatch |= (msg->address_n[4] & 0x80000000) == 0x80000000;
return mismatch;
}
// m/45' - BIP45 Copay Abandoned Multisig P2SH
// m / purpose' / cosigner_index / change / address_index
if (msg->address_n[0] == (0x80000000 + 45)) {
mismatch |= (msg->script_type != InputScriptType_SPENDMULTISIG);
mismatch |= (msg->address_n_count != 4);
mismatch |= (msg->address_n[1] & 0x80000000) == 0x80000000;
mismatch |= (msg->address_n[2] & 0x80000000) == 0x80000000;
mismatch |= (msg->address_n[3] & 0x80000000) == 0x80000000;
return mismatch;
}
// m/48' - BIP48 Copay Multisig P2SH
// m / purpose' / coin_type' / account' / change / address_index
// Electrum:
// m / purpose' / coin_type' / account' / type' / change / address_index
if (msg->address_n[0] == (0x80000000 + 48)) {
mismatch |= (msg->script_type != InputScriptType_SPENDMULTISIG) &&
(msg->script_type != InputScriptType_SPENDP2SHWITNESS) &&
(msg->script_type != InputScriptType_SPENDWITNESS);
mismatch |= (msg->address_n_count != 5) && (msg->address_n_count != 6);
mismatch |= (msg->address_n[1] != coin->coin_type);
mismatch |= (msg->address_n[2] & 0x80000000) == 0;
mismatch |= (msg->address_n[4] & 0x80000000) == 0x80000000;
return mismatch;
}
// m/49' : BIP49 SegWit
// m / purpose' / coin_type' / account' / change / address_index
if (msg->address_n[0] == (0x80000000 + 49)) {
mismatch |= (msg->script_type != InputScriptType_SPENDP2SHWITNESS);
mismatch |= !coin->has_segwit;
mismatch |= !coin->has_address_type_p2sh;
mismatch |= (msg->address_n_count != 5);
mismatch |= (msg->address_n[1] != coin->coin_type);
mismatch |= (msg->address_n[2] & 0x80000000) == 0;
mismatch |= (msg->address_n[3] & 0x80000000) == 0x80000000;
mismatch |= (msg->address_n[4] & 0x80000000) == 0x80000000;
return mismatch;
}
// m/84' : BIP84 Native SegWit
// m / purpose' / coin_type' / account' / change / address_index
if (msg->address_n[0] == (0x80000000 + 84)) {
mismatch |= (msg->script_type != InputScriptType_SPENDWITNESS);
mismatch |= !coin->has_segwit;
mismatch |= !coin->bech32_prefix;
mismatch |= (msg->address_n_count != 5);
mismatch |= (msg->address_n[1] != coin->coin_type);
mismatch |= (msg->address_n[2] & 0x80000000) == 0;
mismatch |= (msg->address_n[3] & 0x80000000) == 0x80000000;
mismatch |= (msg->address_n[4] & 0x80000000) == 0x80000000;
return mismatch;
}
return false;
}
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;
HDNode *node = fsm_getDerivedNode(coin->curve_name, msg->address_n,
msg->address_n_count, NULL);
if (!node) return;
hdnode_fill_public_key(node);
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];
if (msg->has_multisig) {
strlcpy(desc, "Multisig __ of __:", sizeof(desc));
const uint32_t m = msg->multisig.m;
const uint32_t n = msg->multisig.pubkeys_count;
desc[9] = (m < 10) ? ' ' : ('0' + (m / 10));
desc[10] = '0' + (m % 10);
desc[15] = (n < 10) ? ' ' : ('0' + (n / 10));
desc[16] = '0' + (n % 10);
} else {
strlcpy(desc, _("Address:"), sizeof(desc));
}
bool mismatch = path_mismatched(coin, msg);
if (mismatch) {
layoutDialogSwipe(&bmp_icon_warning, _("Abort"), _("Continue"), NULL,
_("Wrong address path"), _("for selected coin."), NULL,
_("Continue at your"), _("own risk!"), NULL);
if (!protectButton(ButtonRequestType_ButtonRequest_Other, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
layoutHome();
return;
}
}
bool is_cashaddr = coin->cashaddr_prefix != NULL;
bool is_bech32 = msg->script_type == InputScriptType_SPENDWITNESS;
if (!fsm_layoutAddress(address, desc, is_cashaddr || is_bech32,
is_cashaddr ? strlen(coin->cashaddr_prefix) + 1 : 0,
msg->address_n, msg->address_n_count, false)) {
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
layoutSignMessage(msg->message.bytes, msg->message.size);
if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
layoutHome();
return;
}
CHECK_PIN
const CoinInfo *coin = fsm_getCoin(msg->has_coin_name, msg->coin_name);
if (!coin) return;
HDNode *node = fsm_getDerivedNode(coin->curve_name, msg->address_n,
msg->address_n_count, NULL);
if (!node) return;
layoutProgressSwipe(_("Signing"), 0);
if (cryptoMessageSign(coin, node, msg->script_type, msg->message.bytes,
msg->message.size, resp->signature.bytes) == 0) {
resp->has_address = true;
hdnode_fill_public_key(node);
if (!compute_address(coin, msg->script_type, node, false, NULL,
resp->address)) {
fsm_sendFailure(FailureType_Failure_ProcessError,
_("Error computing address"));
layoutHome();
return;
}
resp->has_signature = true;
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) {
CHECK_PARAM(msg->has_address, _("No address provided"));
CHECK_PARAM(msg->has_message, _("No message provided"));
const CoinInfo *coin = fsm_getCoin(msg->has_coin_name, msg->coin_name);
if (!coin) return;
layoutProgressSwipe(_("Verifying"), 0);
if (msg->signature.size == 65 &&
cryptoMessageVerify(coin, msg->message.bytes, msg->message.size,
msg->address, msg->signature.bytes) == 0) {
layoutVerifyAddress(coin, msg->address);
if (!protectButton(ButtonRequestType_ButtonRequest_Other, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
layoutHome();
return;
}
layoutVerifyMessage(msg->message.bytes, msg->message.size);
if (!protectButton(ButtonRequestType_ButtonRequest_Other, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
layoutHome();
return;
}
fsm_sendSuccess(_("Message verified"));
} else {
fsm_sendFailure(FailureType_Failure_DataError, _("Invalid signature"));
}
layoutHome();
}