bool storage_getRootNode(HDNode *node)
{
// root node is properly cached
if (sessionRootNodeCached) {
memcpy(node, &sessionRootNode, sizeof(HDNode));
return true;
}
// if storage has node, decrypt and use it
if (storage.has_node) {
if (!protectPassphrase()) {
return false;
}
if (hdnode_from_xprv(storage.node.depth, storage.node.fingerprint, storage.node.child_num, storage.node.chain_code.bytes, storage.node.private_key.bytes, &sessionRootNode) == 0) {
return false;
}
if (storage.has_passphrase_protection && storage.passphrase_protection && strlen(sessionPassphrase)) {
// decrypt hd node
uint8_t secret[64];
uint8_t salt[12];
memcpy(salt, "TREZORHD", 8);
layoutProgressSwipe("Waking up", 0);
pbkdf2_hmac_sha512((const uint8_t *)sessionPassphrase, strlen(sessionPassphrase), salt, 8, BIP39_PBKDF2_ROUNDS, secret, 64, get_root_node_callback);
aes_decrypt_ctx ctx;
aes_decrypt_key256(secret, &ctx);
aes_cbc_decrypt(sessionRootNode.chain_code, sessionRootNode.chain_code, 32, secret + 32, &ctx);
aes_cbc_decrypt(sessionRootNode.private_key, sessionRootNode.private_key, 32, secret + 32, &ctx);
}
memcpy(node, &sessionRootNode, sizeof(HDNode));
sessionRootNodeCached = true;
return true;
}
// if storage has mnemonic, convert it to node and use it
if (storage.has_mnemonic) {
if (!protectPassphrase()) {
return false;
}
uint8_t seed[64];
layoutProgressSwipe("Waking up", 0);
mnemonic_to_seed(storage.mnemonic, sessionPassphrase, seed, get_root_node_callback); // BIP-0039
if (hdnode_from_seed(seed, sizeof(seed), &sessionRootNode) == 0) {
return false;
}
memcpy(node, &sessionRootNode, sizeof(HDNode));
sessionRootNodeCached = true;
return true;
}
return false;
}
void lisk_sign_message(const HDNode *node, const LiskSignMessage *msg,
LiskMessageSignature *resp) {
layoutSignMessage(msg->message.bytes, msg->message.size);
if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
layoutHome();
return;
}
layoutProgressSwipe(_("Signing"), 0);
uint8_t signature[64];
uint8_t hash[32];
lisk_message_hash(msg->message.bytes, msg->message.size, hash);
ed25519_sign(hash, 32, node->private_key, &node->public_key[1], signature);
memcpy(resp->signature.bytes, signature, sizeof(signature));
memcpy(resp->public_key.bytes, &node->public_key[1], 32);
resp->has_signature = true;
resp->signature.size = 64;
resp->has_public_key = true;
resp->public_key.size = 32;
}
void fsm_msgSignMessage(SignMessage *msg)
{
RESP_INIT(MessageSignature);
layoutSignMessage(msg->message.bytes, msg->message.size);
if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Sign message cancelled");
layoutHome();
return;
}
if (!protectPin(true)) {
layoutHome();
return;
}
const CoinType *coin = fsm_getCoin(msg->coin_name);
if (!coin) return;
const HDNode *node = fsm_getDerivedNode(msg->address_n, msg->address_n_count);
if (!node) return;
layoutProgressSwipe("Signing", 0);
if (cryptoMessageSign(msg->message.bytes, msg->message.size, node->private_key, resp->signature.bytes) == 0) {
resp->has_address = true;
uint8_t addr_raw[21];
ecdsa_get_address_raw(node->public_key, coin->address_type, addr_raw);
base58_encode_check(addr_raw, 21, resp->address, sizeof(resp->address));
resp->has_signature = true;
resp->signature.size = 65;
msg_write(MessageType_MessageType_MessageSignature, resp);
} else {
fsm_sendFailure(FailureType_Failure_Other, "Error signing message");
}
layoutHome();
}
void fsm_msgGetAddress(GetAddress *msg)
{
RESP_INIT(Address);
if (!protectPin(true)) {
layoutHome();
return;
}
const CoinType *coin = fsm_getCoin(msg->coin_name);
if (!coin) return;
const HDNode *node = fsm_getDerivedNode(msg->address_n, msg->address_n_count);
if (!node) return;
if (msg->has_multisig) {
layoutProgressSwipe("Preparing", 0);
if (cryptoMultisigPubkeyIndex(&(msg->multisig), node->public_key) < 0) {
fsm_sendFailure(FailureType_Failure_Other, "Pubkey not found in multisig script");
layoutHome();
return;
}
uint8_t buf[32];
if (compile_script_multisig_hash(&(msg->multisig), buf) == 0) {
fsm_sendFailure(FailureType_Failure_Other, "Invalid multisig script");
layoutHome();
return;
}
ripemd160(buf, 32, buf + 1);
buf[0] = coin->address_type_p2sh; // multisig cointype
base58_encode_check(buf, 21, resp->address, sizeof(resp->address));
} else {
ecdsa_get_address(node->public_key, coin->address_type, resp->address, sizeof(resp->address));
}
if (msg->has_show_display && msg->show_display) {
char desc[16];
if (msg->has_multisig) {
strlcpy(desc, "Msig __ of __:", sizeof(desc));
const uint32_t m = msg->multisig.m;
const uint32_t n = msg->multisig.pubkeys_count;
desc[5] = (m < 10) ? ' ': ('0' + (m / 10));
desc[6] = '0' + (m % 10);
desc[11] = (n < 10) ? ' ': ('0' + (n / 10));
desc[12] = '0' + (n % 10);
} else {
strlcpy(desc, "Address:", sizeof(desc));
}
layoutAddress(resp->address, desc);
if (!protectButton(ButtonRequestType_ButtonRequest_Address, true)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Show address cancelled");
layoutHome();
return;
}
}
msg_write(MessageType_MessageType_Address, resp);
layoutHome();
}
void fsm_msgEncryptMessage(EncryptMessage *msg)
{
if (!msg->has_pubkey) {
fsm_sendFailure(FailureType_Failure_SyntaxError, "No public key provided");
return;
}
if (!msg->has_message) {
fsm_sendFailure(FailureType_Failure_SyntaxError, "No message provided");
return;
}
curve_point pubkey;
if (msg->pubkey.size != 33 || ecdsa_read_pubkey(&secp256k1, msg->pubkey.bytes, &pubkey) == 0) {
fsm_sendFailure(FailureType_Failure_SyntaxError, "Invalid public key provided");
return;
}
bool display_only = msg->has_display_only && msg->display_only;
bool signing = msg->address_n_count > 0;
RESP_INIT(EncryptedMessage);
const CoinType *coin = 0;
const HDNode *node = 0;
uint8_t address_raw[21];
if (signing) {
coin = coinByName(msg->coin_name);
if (!coin) {
fsm_sendFailure(FailureType_Failure_Other, "Invalid coin name");
return;
}
if (!protectPin(true)) {
layoutHome();
return;
}
node = fsm_getDerivedNode(msg->address_n, msg->address_n_count);
if (!node) return;
uint8_t public_key[33];
ecdsa_get_public_key33(&secp256k1, node->private_key, public_key);
ecdsa_get_address_raw(public_key, coin->address_type, address_raw);
}
layoutEncryptMessage(msg->message.bytes, msg->message.size, signing);
if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Encrypt message cancelled");
layoutHome();
return;
}
layoutProgressSwipe("Encrypting", 0);
if (cryptoMessageEncrypt(&pubkey, msg->message.bytes, msg->message.size, display_only, resp->nonce.bytes, &(resp->nonce.size), resp->message.bytes, &(resp->message.size), resp->hmac.bytes, &(resp->hmac.size), signing ? node->private_key : 0, signing ? address_raw : 0) != 0) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Error encrypting message");
layoutHome();
return;
}
resp->has_nonce = true;
resp->has_message = true;
resp->has_hmac = true;
msg_write(MessageType_MessageType_EncryptedMessage, resp);
layoutHome();
}
void fsm_msgDecryptMessage(DecryptMessage *msg)
{
if (!msg->has_nonce) {
fsm_sendFailure(FailureType_Failure_SyntaxError, "No nonce provided");
return;
}
if (!msg->has_message) {
fsm_sendFailure(FailureType_Failure_SyntaxError, "No message provided");
return;
}
if (!msg->has_hmac) {
fsm_sendFailure(FailureType_Failure_SyntaxError, "No message hmac provided");
return;
}
curve_point nonce_pubkey;
if (msg->nonce.size != 33 || ecdsa_read_pubkey(&secp256k1, msg->nonce.bytes, &nonce_pubkey) == 0) {
fsm_sendFailure(FailureType_Failure_SyntaxError, "Invalid nonce provided");
return;
}
if (!protectPin(true)) {
layoutHome();
return;
}
const HDNode *node = fsm_getDerivedNode(msg->address_n, msg->address_n_count);
if (!node) return;
layoutProgressSwipe("Decrypting", 0);
RESP_INIT(DecryptedMessage);
bool display_only = false;
bool signing = false;
uint8_t address_raw[21];
if (cryptoMessageDecrypt(&nonce_pubkey, msg->message.bytes, msg->message.size, msg->hmac.bytes, msg->hmac.size, node->private_key, resp->message.bytes, &(resp->message.size), &display_only, &signing, address_raw) != 0) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Error decrypting message");
layoutHome();
return;
}
if (signing) {
base58_encode_check(address_raw, 21, resp->address, sizeof(resp->address));
}
layoutDecryptMessage(resp->message.bytes, resp->message.size, signing ? resp->address : 0);
protectButton(ButtonRequestType_ButtonRequest_Other, true);
if (display_only) {
resp->has_address = false;
resp->has_message = false;
memset(resp->address, 0, sizeof(resp->address));
memset(&(resp->message), 0, sizeof(resp->message));
} else {
resp->has_address = signing;
resp->has_message = true;
}
msg_write(MessageType_MessageType_DecryptedMessage, resp);
layoutHome();
}
void fsm_deriveKey(HDNode *node, uint32_t *address_n, size_t address_n_count)
{
size_t i;
if (address_n_count > 3) {
layoutProgressSwipe("Preparing keys", 0, 0);
}
for (i = 0; i < address_n_count; i++) {
hdnode_private_ckd(node, address_n[i]);
if (address_n_count > 3) {
layoutProgress("Preparing keys", 1000 * i / address_n_count, i);
}
}
}
void fsm_msgVerifyMessage(VerifyMessage *msg)
{
const char *address = msg->has_address ? msg->address : 0;
layoutProgressSwipe("Verifying", 0, 0);
if (msg->signature.size == 65 && transactionMessageVerify(msg->message.bytes, msg->message.size, msg->signature.bytes, address)) {
layoutVerifyMessage(msg->message.bytes, msg->message.size);
protectButton(ButtonRequestType_ButtonRequest_Other, true);
fsm_sendSuccess("Message verified");
} else {
fsm_sendFailure(FailureType_Failure_InvalidSignature, "Invalid signature");
}
layoutHome();
}
void fsm_msgSignMessage(SignMessage *msg)
{
RESP_INIT(MessageSignature);
layoutSignMessage(msg->message.bytes, msg->message.size);
if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Sign message cancelled");
layoutHome();
return;
}
if (!protectPin(true)) {
layoutHome();
return;
}
HDNode *node = fsm_getRootNode();
if (!node) return;
const CoinType *coin = coinByName(msg->coin_name);
if (!coin) {
fsm_sendFailure(FailureType_Failure_Other, "Invalid coin name");
layoutHome();
return;
}
fsm_deriveKey(node, msg->address_n, msg->address_n_count);
ecdsa_get_address(node->public_key, coin->address_type, resp->address);
layoutProgressSwipe("Signing", 0, 0);
if (transactionMessageSign(msg->message.bytes, msg->message.size, node->private_key, resp->address, resp->signature.bytes)) {
resp->has_address = true;
resp->has_signature = true;
resp->signature.size = 65;
msg_write(MessageType_MessageType_MessageSignature, resp);
} else {
fsm_sendFailure(FailureType_Failure_Other, "Error signing message");
}
layoutHome();
}
void fsm_msgVerifyMessage(VerifyMessage *msg)
{
if (!msg->has_address) {
fsm_sendFailure(FailureType_Failure_Other, "No address provided");
return;
}
if (!msg->has_message) {
fsm_sendFailure(FailureType_Failure_Other, "No message provided");
return;
}
layoutProgressSwipe("Verifying", 0);
uint8_t addr_raw[21];
if (!ecdsa_address_decode(msg->address, addr_raw)) {
fsm_sendFailure(FailureType_Failure_InvalidSignature, "Invalid address");
}
if (msg->signature.size == 65 && cryptoMessageVerify(msg->message.bytes, msg->message.size, addr_raw, msg->signature.bytes) == 0) {
layoutVerifyMessage(msg->message.bytes, msg->message.size);
protectButton(ButtonRequestType_ButtonRequest_Other, true);
fsm_sendSuccess("Message verified");
} else {
fsm_sendFailure(FailureType_Failure_InvalidSignature, "Invalid signature");
}
layoutHome();
}
void lisk_sign_tx(const HDNode *node, LiskSignTx *msg, LiskSignedTx *resp) {
lisk_update_raw_tx(node, msg);
if (msg->has_transaction) {
SHA256_CTX ctx;
sha256_Init(&ctx);
switch (msg->transaction.type) {
case LiskTransactionType_Transfer:
layoutRequireConfirmTx(msg->transaction.recipient_id,
msg->transaction.amount);
break;
case LiskTransactionType_RegisterDelegate:
layoutRequireConfirmDelegateRegistration(&msg->transaction.asset);
break;
case LiskTransactionType_CastVotes:
layoutRequireConfirmCastVotes(&msg->transaction.asset);
break;
case LiskTransactionType_RegisterSecondPassphrase:
layoutLiskPublicKey(msg->transaction.asset.signature.public_key.bytes);
break;
case LiskTransactionType_RegisterMultisignatureAccount:
layoutRequireConfirmMultisig(&msg->transaction.asset);
break;
default:
fsm_sendFailure(FailureType_Failure_DataError,
_("Invalid transaction type"));
layoutHome();
break;
}
if (!protectButton((msg->transaction.type ==
LiskTransactionType_RegisterSecondPassphrase
? ButtonRequestType_ButtonRequest_PublicKey
: ButtonRequestType_ButtonRequest_SignTx),
false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Signing cancelled");
layoutHome();
return;
}
layoutRequireConfirmFee(msg->transaction.fee, msg->transaction.amount);
if (!protectButton(ButtonRequestType_ButtonRequest_ConfirmOutput, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Signing cancelled");
layoutHome();
return;
}
layoutProgressSwipe(_("Signing transaction"), 0);
sha256_Update(&ctx, (const uint8_t *)&msg->transaction.type, 1);
lisk_hashupdate_uint32(&ctx, msg->transaction.timestamp);
sha256_Update(&ctx, msg->transaction.sender_public_key.bytes, 32);
if (msg->transaction.has_requester_public_key) {
sha256_Update(&ctx, msg->transaction.requester_public_key.bytes,
msg->transaction.requester_public_key.size);
}
uint64_t recipient_id = 0;
if (msg->transaction.has_recipient_id &&
msg->transaction.recipient_id[0] != 0) {
// parse integer from lisk address ("123L" -> 123)
for (size_t i = 0; i < strlen(msg->transaction.recipient_id) - 1; i++) {
if (msg->transaction.recipient_id[i] < '0' ||
msg->transaction.recipient_id[i] > '9') {
fsm_sendFailure(FailureType_Failure_DataError,
_("Invalid recipient_id"));
layoutHome();
return;
}
recipient_id *= 10;
recipient_id += (msg->transaction.recipient_id[i] - '0');
}
}
lisk_hashupdate_uint64_be(&ctx, recipient_id);
lisk_hashupdate_uint64_le(&ctx, msg->transaction.amount);
lisk_hashupdate_asset(&ctx, msg->transaction.type, &msg->transaction.asset);
// if signature exist calculate second signature
if (msg->transaction.has_signature) {
sha256_Update(&ctx, msg->transaction.signature.bytes,
msg->transaction.signature.size);
}
uint8_t hash[32];
sha256_Final(&ctx, hash);
ed25519_sign(hash, 32, node->private_key, &node->public_key[1],
resp->signature.bytes);
resp->has_signature = true;
resp->signature.size = 64;
}
}
void fsm_msgSignIdentity(SignIdentity *msg)
{
RESP_INIT(SignedIdentity);
layoutSignIdentity(&(msg->identity), msg->has_challenge_visual ? msg->challenge_visual : 0);
if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Sign identity cancelled");
layoutHome();
return;
}
if (!protectPin(true)) {
layoutHome();
return;
}
uint8_t hash[32];
if (!msg->has_identity || cryptoIdentityFingerprint(&(msg->identity), hash) == 0) {
fsm_sendFailure(FailureType_Failure_Other, "Invalid identity");
layoutHome();
return;
}
uint32_t address_n[5];
address_n[0] = 0x80000000 | 13;
address_n[1] = 0x80000000 | hash[ 0] | (hash[ 1] << 8) | (hash[ 2] << 16) | (hash[ 3] << 24);
address_n[2] = 0x80000000 | hash[ 4] | (hash[ 5] << 8) | (hash[ 6] << 16) | (hash[ 7] << 24);
address_n[3] = 0x80000000 | hash[ 8] | (hash[ 9] << 8) | (hash[10] << 16) | (hash[11] << 24);
address_n[4] = 0x80000000 | hash[12] | (hash[13] << 8) | (hash[14] << 16) | (hash[15] << 24);
const HDNode *node = fsm_getDerivedNode(address_n, 5);
if (!node) return;
uint8_t public_key[33]; // copy public key to temporary buffer
memcpy(public_key, node->public_key, sizeof(public_key));
if (msg->has_ecdsa_curve_name) {
const ecdsa_curve *curve = get_curve_by_name(msg->ecdsa_curve_name);
if (curve) {
// correct public key (since fsm_getDerivedNode uses secp256k1 curve)
ecdsa_get_public_key33(curve, node->private_key, public_key);
}
}
bool sign_ssh = msg->identity.has_proto && (strcmp(msg->identity.proto, "ssh") == 0);
int result = 0;
layoutProgressSwipe("Signing", 0);
if (sign_ssh) { // SSH does not sign visual challenge
result = sshMessageSign(msg->challenge_hidden.bytes, msg->challenge_hidden.size, node->private_key, resp->signature.bytes);
} else {
uint8_t digest[64];
sha256_Raw(msg->challenge_hidden.bytes, msg->challenge_hidden.size, digest);
sha256_Raw((const uint8_t *)msg->challenge_visual, strlen(msg->challenge_visual), digest + 32);
result = cryptoMessageSign(digest, 64, node->private_key, resp->signature.bytes);
}
if (result == 0) {
if (sign_ssh) {
resp->has_address = false;
} else {
resp->has_address = true;
uint8_t addr_raw[21];
ecdsa_get_address_raw(node->public_key, 0x00, addr_raw); // hardcoded Bitcoin address type
base58_encode_check(addr_raw, 21, resp->address, sizeof(resp->address));
}
resp->has_public_key = true;
resp->public_key.size = 33;
memcpy(resp->public_key.bytes, public_key, 33);
resp->has_signature = true;
resp->signature.size = 65;
msg_write(MessageType_MessageType_SignedIdentity, resp);
} else {
fsm_sendFailure(FailureType_Failure_Other, "Error signing identity");
}
layoutHome();
}