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5c4703c9bb
When doing Ethereum signTypedData, and the primaryType="EIP712Domain", we completely ignore the "message" part and only sign the domain. According to the community, this is technically allowed by the spec, and may be used by ETH smart contracts to save on gas. Test case generated by @MetaMask/eth-sig-util's library. See: https://ethereum-magicians.org/t/eip-712-standards-clarification-primarytype-as-domaintype/3286
276 lines
8.1 KiB
C
276 lines
8.1 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_msgEthereumGetPublicKey(const EthereumGetPublicKey *msg) {
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RESP_INIT(EthereumPublicKey);
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CHECK_INITIALIZED
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CHECK_PIN
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// we use Bitcoin-like format for ETH
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const CoinInfo *coin = fsm_getCoin(true, "Bitcoin");
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if (!coin) return;
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const char *curve = coin->curve_name;
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uint32_t fingerprint;
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HDNode *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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if (msg->has_show_display && msg->show_display) {
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layoutPublicKey(node->public_key);
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if (!protectButton(ButtonRequestType_ButtonRequest_PublicKey, 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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}
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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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hdnode_serialize_public(node, fingerprint, coin->xpub_magic, resp->xpub,
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sizeof(resp->xpub));
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msg_write(MessageType_MessageType_EthereumPublicKey, resp);
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layoutHome();
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}
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void fsm_msgEthereumSignTx(const EthereumSignTx *msg) {
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CHECK_INITIALIZED
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CHECK_PIN
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const HDNode *node = fsm_getDerivedNode(SECP256K1_NAME, msg->address_n,
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msg->address_n_count, NULL);
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if (!node) return;
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ethereum_signing_init(msg, node);
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}
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void fsm_msgEthereumSignTxEIP1559(const EthereumSignTxEIP1559 *msg) {
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CHECK_INITIALIZED
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CHECK_PIN
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const HDNode *node = fsm_getDerivedNode(SECP256K1_NAME, msg->address_n,
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msg->address_n_count, NULL);
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if (!node) return;
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ethereum_signing_init_eip1559(msg, node);
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}
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void fsm_msgEthereumTxAck(const EthereumTxAck *msg) {
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ethereum_signing_txack(msg);
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}
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void fsm_msgEthereumGetAddress(const EthereumGetAddress *msg) {
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RESP_INIT(EthereumAddress);
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CHECK_INITIALIZED
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CHECK_PIN
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const HDNode *node = fsm_getDerivedNode(SECP256K1_NAME, msg->address_n,
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msg->address_n_count, NULL);
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if (!node) return;
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uint8_t pubkeyhash[20];
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if (!hdnode_get_ethereum_pubkeyhash(node, pubkeyhash)) return;
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uint32_t slip44 =
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(msg->address_n_count > 1) ? (msg->address_n[1] & 0x7fffffff) : 0;
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bool rskip60 = false;
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uint64_t chain_id = 0;
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// constants from trezor-common/defs/ethereum/networks.json
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switch (slip44) {
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case 137:
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rskip60 = true;
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chain_id = 30;
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break;
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case 37310:
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rskip60 = true;
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chain_id = 31;
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break;
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}
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resp->has_address = true;
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ethereum_address_checksum(pubkeyhash, resp->address, rskip60, chain_id);
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// ethereum_address_checksum adds trailing zero
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if (msg->has_show_display && msg->show_display) {
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char desc[16];
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strlcpy(desc, "Address:", sizeof(desc));
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if (!fsm_layoutAddress(resp->address, desc, false, 0, msg->address_n,
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msg->address_n_count, true, NULL, 0, 0, NULL)) {
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return;
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}
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}
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msg_write(MessageType_MessageType_EthereumAddress, resp);
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layoutHome();
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}
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void fsm_msgEthereumSignMessage(const EthereumSignMessage *msg) {
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RESP_INIT(EthereumMessageSignature);
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CHECK_INITIALIZED
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CHECK_PIN
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const HDNode *node = fsm_getDerivedNode(SECP256K1_NAME, msg->address_n,
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msg->address_n_count, NULL);
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if (!node) return;
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uint8_t pubkeyhash[20] = {0};
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if (!hdnode_get_ethereum_pubkeyhash(node, pubkeyhash)) {
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return;
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}
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ethereum_address_checksum(pubkeyhash, resp->address, false, 0);
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// ethereum_address_checksum adds trailing zero
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layoutVerifyAddress(NULL, 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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ethereum_message_sign(msg, node, resp);
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layoutHome();
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}
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void fsm_msgEthereumVerifyMessage(const EthereumVerifyMessage *msg) {
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if (ethereum_message_verify(msg) != 0) {
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fsm_sendFailure(FailureType_Failure_DataError, _("Invalid signature"));
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return;
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}
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uint8_t pubkeyhash[20];
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if (!ethereum_parse(msg->address, pubkeyhash)) {
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fsm_sendFailure(FailureType_Failure_DataError, _("Invalid address"));
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return;
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}
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layoutVerifyAddress(NULL, 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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fsm_sendSuccess(_("Message verified"));
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layoutHome();
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}
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void fsm_msgEthereumSignTypedHash(const EthereumSignTypedHash *msg) {
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RESP_INIT(EthereumTypedDataSignature);
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CHECK_INITIALIZED
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CHECK_PIN
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if (msg->domain_separator_hash.size != 32 ||
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(msg->has_message_hash && msg->message_hash.size != 32)) {
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fsm_sendFailure(FailureType_Failure_DataError, _("Invalid hash length"));
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return;
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}
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layoutDialogSwipe(&bmp_icon_warning, _("Abort"), _("Continue"), NULL,
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_("Unable to show"), _("EIP-712 data."), NULL,
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_("Sign at your own risk."), NULL, NULL);
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if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, 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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const HDNode *node = fsm_getDerivedNode(SECP256K1_NAME, msg->address_n,
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msg->address_n_count, NULL);
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if (!node) return;
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uint8_t pubkeyhash[20] = {0};
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if (!hdnode_get_ethereum_pubkeyhash(node, pubkeyhash)) {
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return;
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}
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ethereum_address_checksum(pubkeyhash, resp->address, false, 0);
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// ethereum_address_checksum adds trailing zero
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layoutVerifyAddress(NULL, 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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layoutConfirmHash(&bmp_icon_warning, _("EIP-712 domain hash"),
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msg->domain_separator_hash.bytes, 32);
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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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// No message hash when setting primaryType="EIP712Domain"
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// https://ethereum-magicians.org/t/eip-712-standards-clarification-primarytype-as-domaintype/3286
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if (msg->has_message_hash) {
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layoutConfirmHash(&bmp_icon_warning, _("EIP-712 message hash"),
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msg->message_hash.bytes, 32);
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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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}
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ethereum_typed_hash_sign(msg, node, resp);
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layoutHome();
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}
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