void fsm_msgApplySettings(ApplySettings *msg)
{
if (msg->has_label && msg->has_language) {
layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", "change label to", msg->label, "and language to", msg->language, "?");
} else
if (msg->has_label) {
layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", "change label to", msg->label, "?", NULL, NULL);
} else
if (msg->has_language) {
layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", "change language to", msg->language, "?", NULL, NULL);
} else {
fsm_sendFailure(FailureType_Failure_SyntaxError, "No setting provided");
return;
}
if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Apply settings cancelled");
layoutHome();
return;
}
if (!protectPin(true)) {
layoutHome();
return;
}
if (msg->has_label) {
storage_setLabel(msg->label);
}
if (msg->has_language) {
storage_setLanguage(msg->language);
}
storage_commit();
fsm_sendSuccess("Settings applied");
layoutHome();
}
void fsm_msgSignTx(SignTx *msg)
{
if (msg->inputs_count < 1) {
fsm_sendFailure(FailureType_Failure_Other, "Transaction must have at least one input");
layoutHome();
return;
}
if (msg->outputs_count < 1) {
fsm_sendFailure(FailureType_Failure_Other, "Transaction must have at least one output");
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;
}
signing_init(msg->inputs_count, msg->outputs_count, coin, node);
}
void fsm_msgPing(Ping *msg)
{
RESP_INIT(Success);
if (msg->has_button_protection && msg->button_protection) {
layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", "answer to ping?", NULL, NULL, NULL, NULL);
if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Ping cancelled");
layoutHome();
return;
}
}
if (msg->has_pin_protection && msg->pin_protection) {
if (!protectPin(true)) {
layoutHome();
return;
}
}
if (msg->has_passphrase_protection && msg->passphrase_protection) {
if (!protectPassphrase()) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Ping cancelled");
return;
}
}
if (msg->has_message) {
resp->has_message = true;
memcpy(&(resp->message), &(msg->message), sizeof(resp->message));
}
msg_write(MessageType_MessageType_Success, resp);
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;
}
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_msgApplySettings(ApplySettings *msg)
{
if (msg->has_label) {
layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", "change label to", msg->label, "?", NULL, NULL);
if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Apply settings cancelled");
layoutHome();
return;
}
}
if (msg->has_language) {
layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", "change language to", msg->language, "?", NULL, NULL);
if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Apply settings cancelled");
layoutHome();
return;
}
}
if (msg->has_use_passphrase) {
layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", msg->use_passphrase ? "enable passphrase" : "disable passphrase", "encryption?", NULL, NULL, NULL);
if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Apply settings cancelled");
layoutHome();
return;
}
}
if (msg->has_homescreen) {
layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", "change the home", "screen ?", NULL, NULL, NULL);
if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Apply settings cancelled");
layoutHome();
return;
}
}
if (!msg->has_label && !msg->has_language && !msg->has_use_passphrase && !msg->has_homescreen) {
fsm_sendFailure(FailureType_Failure_SyntaxError, "No setting provided");
return;
}
if (!protectPin(true)) {
layoutHome();
return;
}
if (msg->has_label) {
storage_setLabel(msg->label);
}
if (msg->has_language) {
storage_setLanguage(msg->language);
}
if (msg->has_use_passphrase) {
storage_setPassphraseProtection(msg->use_passphrase);
}
if (msg->has_homescreen) {
storage_setHomescreen(msg->homescreen.bytes, msg->homescreen.size);
}
storage_commit();
fsm_sendSuccess("Settings applied");
layoutHome();
}
void fsm_msgCipherKeyValue(CipherKeyValue *msg)
{
if (!msg->has_key) {
fsm_sendFailure(FailureType_Failure_SyntaxError, "No key provided");
return;
}
if (!msg->has_value) {
fsm_sendFailure(FailureType_Failure_SyntaxError, "No value provided");
return;
}
if (msg->value.size % 16) {
fsm_sendFailure(FailureType_Failure_SyntaxError, "Value length must be a multiple of 16");
return;
}
if (!protectPin(true)) {
layoutHome();
return;
}
HDNode *node = fsm_getRootNode();
if (!node) return;
fsm_deriveKey(node, msg->address_n, msg->address_n_count);
bool encrypt = msg->has_encrypt && msg->encrypt;
bool ask_on_encrypt = msg->has_ask_on_encrypt && msg->ask_on_encrypt;
bool ask_on_decrypt = msg->has_ask_on_decrypt && msg->ask_on_decrypt;
if ((encrypt && ask_on_encrypt) || (!encrypt && ask_on_decrypt)) {
layoutCipherKeyValue(encrypt, msg->key);
if (!protectButton(ButtonRequestType_ButtonRequest_Other, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, "CipherKeyValue cancelled");
layoutHome();
return;
}
}
uint8_t data[256 + 4];
strlcpy((char *)data, msg->key, sizeof(data));
strlcat((char *)data, ask_on_encrypt ? "E1" : "E0", sizeof(data));
strlcat((char *)data, ask_on_decrypt ? "D1" : "D0", sizeof(data));
hmac_sha512(node->private_key, 32, data, strlen((char *)data), data);
RESP_INIT(Success);
if (encrypt) {
aes_encrypt_ctx ctx;
aes_encrypt_key256(data, &ctx);
aes_cbc_encrypt(msg->value.bytes, resp->payload.bytes, msg->value.size, data + 32, &ctx);
} else {
aes_decrypt_ctx ctx;
aes_decrypt_key256(data, &ctx);
aes_cbc_decrypt(msg->value.bytes, resp->payload.bytes, msg->value.size, data + 32, &ctx);
}
resp->has_payload = true;
resp->payload.size = msg->value.size;
msg_write(MessageType_MessageType_Success, 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_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_msgChangePin(ChangePin *msg)
{
bool removal = msg->has_remove && msg->remove;
if (removal) {
if (storage_hasPin()) {
layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", "remove current PIN?", NULL, NULL, NULL, NULL);
} else {
fsm_sendSuccess("PIN removed");
return;
}
} else {
if (storage_hasPin()) {
layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", "change current PIN?", NULL, NULL, NULL, NULL);
} else {
layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", "set new PIN?", NULL, NULL, NULL, NULL);
}
}
if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, removal ? "PIN removal cancelled" : "PIN change cancelled");
layoutHome();
return;
}
if (!protectPin(false)) {
layoutHome();
return;
}
if (removal) {
storage_setPin(0);
fsm_sendSuccess("PIN removed");
} else {
if (protectChangePin()) {
fsm_sendSuccess("PIN changed");
} else {
fsm_sendFailure(FailureType_Failure_ActionCancelled, "PIN change failed");
}
}
layoutHome();
}
void fsm_msgGetPublicKey(GetPublicKey *msg)
{
RESP_INIT(PublicKey);
if (!protectPin(true)) {
layoutHome();
return;
}
const HDNode *node = fsm_getDerivedNode(msg->address_n, msg->address_n_count);
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);
}
}
resp->node.depth = node->depth;
resp->node.fingerprint = node->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, public_key, 33);
resp->has_xpub = true;
hdnode_serialize_public(node, resp->xpub, sizeof(resp->xpub));
msg_write(MessageType_MessageType_PublicKey, resp);
layoutHome();
}
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();
}
