void fsm_msgGetPublicKey(GetPublicKey *msg)
{
RESP_INIT(PublicKey);
HDNode *node = fsm_getRootNode();
if (!node) return;
fsm_deriveKey(node, msg->address_n, msg->address_n_count);
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, node->public_key, 33);
resp->has_xpub = true;
hdnode_serialize_public(node, resp->xpub);
msg_write(MessageType_MessageType_PublicKey, resp);
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();
}
