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Merge pull request #10998

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2648a4a device: report ledger state when no app is open (reservedbytes)

ACKs: selsta, jpk68
This commit is contained in:
tobtoht
2026-08-07 18:24:53 +00:00
parent 189af8ec0d 2648a4a335
commit f4015164a7
1 changed files with 35 additions and 0 deletions
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src/device/device_ledger.cpp
+35
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@@ -554,6 +554,8 @@ namespace hw {
return true;
}
#define LEDGER_VID 0x2c97
static const std::vector<hw::io::hid_conn_params> known_devices {
{0x2c97, 0x0001, 0, 0xffa0},
{0x2c97, 0x0004, 0, 0xffa0},
@@ -563,8 +565,41 @@ namespace hw {
{0x2c97, 0x0008, 0, 0xffa0},
};
// A Ledger reports a different product id depending on whether an app is running,
// so a device with no app open matches none of known_devices and is otherwise
// indistinguishable from an absent one.
static bool find_ledger_without_app(unsigned int &pid) {
for (const auto &device: known_devices) {
if (hid_device_info *info = hid_enumerate(device.vid, device.pid)) {
hid_free_enumeration(info);
return false;
}
}
if (hid_device_info *info = hid_enumerate(LEDGER_VID, 0x0000)) {
pid = info->product_id;
hid_free_enumeration(info);
return true;
}
return false;
}
bool device_ledger::connect(void) {
this->disconnect();
unsigned int pid = 0;
if (find_ledger_without_app(pid)) {
// Ask the Ledger OS for the running application: a locked device answers
// SW_LOCKED_DEVICE, an unlocked one answers from its dashboard.
unsigned char command[] = {0xb0, 0x01, 0x00, 0x00, 0x00};
unsigned char response[BUFFER_RECV_SIZE];
hw_device.connect(LEDGER_VID, pid, 0, 0xffa0);
const int recv = hw_device.exchange(command, sizeof(command), response, sizeof(response), false);
hw_device.disconnect();
ASSERT_X(recv >= 2, "Communication error, less than two bytes received");
ASSERT_X(((response[recv-2]<<8) | response[recv-1]) != SW_LOCKED_DEVICE, "Ledger is locked.");
ASSERT_X(false, "Open the Monero app on your Ledger.");
}
hw_device.connect(known_devices);
this->reset();
#ifdef DEBUG_HWDEVICE