rust/bitbox02: add get_securechip_type()

Will be needed to decide if they keyboard in the password entry should
default to digits.

Author: benma

src/rust/bitbox02-sys/build.rs

@@ -40,6 +40,8 @@ const ALLOWLIST_VARS: &[&str] = &[
     "MEMORY_SPI_BLE_FIRMWARE_2_ADDR",
     "MEMORY_PLATFORM_BITBOX02",
     "MEMORY_PLATFORM_BITBOX02_PLUS",
+    "MEMORY_SECURECHIP_TYPE_ATECC",
+    "MEMORY_SECURECHIP_TYPE_OPTIGA",
 ];
 
 const ALLOWLIST_TYPES: &[&str] = &[
@@ -110,6 +112,7 @@ const ALLOWLIST_FNS: &[&str] = &[
     "memory_get_ble_metadata",
     "memory_set_ble_metadata",
     "memory_get_platform",
+    "memory_get_securechip_type",
     "memory_spi_get_active_ble_firmware_version",
     "spi_mem_write",
     "menu_create",

src/rust/bitbox02/src/memory.rs

@@ -175,6 +175,19 @@ pub fn get_platform() -> Result<Platform, ()> {
     }
 }
 
+pub enum SecurechipType {
+    Atecc,
+    Optiga,
+}
+
+pub fn get_securechip_type() -> Result<SecurechipType, ()> {
+    match unsafe { bitbox02_sys::memory_get_securechip_type() as u32 } {
+        bitbox02_sys::MEMORY_SECURECHIP_TYPE_ATECC => Ok(SecurechipType::Atecc),
+        bitbox02_sys::MEMORY_SECURECHIP_TYPE_OPTIGA => Ok(SecurechipType::Optiga),
+        _ => Err(()),
+    }
+}
+
 pub fn get_ble_metadata() -> BleMetadata {
     let mut metadata = core::mem::MaybeUninit::uninit();