Add HWI binary implementation

Author: ben-kaufman

src/error.rs

@@ -78,6 +78,7 @@ pub enum Error {
     Io(std::io::Error),
     Hwi(String, Option<ErrorCode>),
     Python(pyo3::PyErr),
+    NotImplemented,
 }
 
 impl fmt::Display for Error {
@@ -90,6 +91,7 @@ impl fmt::Display for Error {
             Io(_) => f.write_str("I/O error"),
             Hwi(ref s, ref code) => write!(f, "HWI error: {}, ({:?})", s, code),
             Python(_) => f.write_str("python error"),
+            NotImplemented => f.write_str("not implemented"),
         }
     }
 }
@@ -104,6 +106,7 @@ impl std::error::Error for Error {
             Io(ref e) => Some(e),
             Hwi(_, _) => None,
             Python(ref e) => Some(e),
+            NotImplemented => None,
         }
     }
 }

src/implementations.rs

@@ -1 +1,2 @@
+pub mod binary_implementation;
 pub mod python_implementation;

src/implementations/binary_implementation.rs

@@ -0,0 +1,327 @@
+use serde_json::value::Value;
+use std::str;
+
+use crate::error::Error;
+use crate::types::{
+    HWIAddressType, HWIBinaryExecutor, HWIChain, HWIDevice, HWIDeviceType, HWIImplementation,
+    LogLevel,
+};
+use bitcoin::Psbt;
+
+macro_rules! deserialize_obj {
+    ( $e: expr ) => {{
+        let value: Value = serde_json::from_str($e)?;
+        let obj = value.clone();
+        serde_json::from_value(value)
+            .map_err(|e| Error::Hwi(format!("error {} while deserializing {}", e, obj), None))
+    }};
+}
+
+#[derive(Debug)]
+pub struct BinaryHWIImplementation<T: HWIBinaryExecutor> {
+    device: Option<HWIDevice>,
+    expert: bool,
+    chain: HWIChain,
+    _phantom: std::marker::PhantomData<T>,
+}
+
+impl<T: HWIBinaryExecutor> HWIImplementation for BinaryHWIImplementation<T> {
+    fn enumerate() -> Result<String, Error> {
+        let output =
+            BinaryHWIImplementation::<T>::run_hwi_command(None, false, None, vec!["enumerate"])?;
+        Ok(output.to_string())
+    }
+
+    fn get_client(device: &HWIDevice, expert: bool, chain: HWIChain) -> Result<Self, Error> {
+        Ok(Self {
+            device: Some(device.clone()),
+            expert,
+            chain,
+            _phantom: std::marker::PhantomData,
+        })
+    }
+
+    fn find_device(
+        password: Option<&str>,
+        device_type: Option<HWIDeviceType>,
+        fingerprint: Option<&str>,
+        expert: bool,
+        chain: HWIChain,
+    ) -> Result<Self, Error> {
+        let mut client = BinaryHWIImplementation {
+            device: None,
+            expert,
+            chain,
+            _phantom: std::marker::PhantomData,
+        };
+
+        let mut args = vec!["enumerate"];
+
+        if let Some(pw) = password {
+            args.extend_from_slice(&["--password", pw]);
+        }
+
+        let output =
+            BinaryHWIImplementation::<T>::run_hwi_command(None, expert, Some(&client.chain), args)?;
+        let devices: Vec<HWIDevice> = deserialize_obj!(&output)?;
+
+        let device = devices
+            .into_iter()
+            .filter(|d| {
+                device_type.as_ref().map_or(true, |t| &d.device_type == t)
+                    && fingerprint.map_or(true, |f| &d.fingerprint.to_string() == f)
+            })
+            .next()
+            .ok_or_else(|| Error::Hwi("No matching device found".to_string(), None))?;
+
+        client.device = Some(device);
+        Ok(client)
+    }
+
+    fn get_master_xpub(&self, addrtype: HWIAddressType, account: u32) -> Result<String, Error> {
+        let mut args = vec!["getmasterxpub"];
+        let addrtype_str = addrtype.to_string();
+        let account_str = account.to_string();
+        args.extend_from_slice(&["--addr-type", &addrtype_str]);
+        args.extend_from_slice(&["--account", &account_str]);
+
+        BinaryHWIImplementation::<T>::run_hwi_command(
+            self.device.as_ref(),
+            self.expert,
+            Some(&self.chain),
+            args,
+        )
+    }
+
+    fn sign_tx(&self, psbt: &Psbt) -> Result<String, Error> {
+        let psbt_str = psbt.to_string();
+        let args = vec!["signtx", &psbt_str];
+
+        let output = BinaryHWIImplementation::<T>::run_hwi_command(
+            self.device.as_ref(),
+            self.expert,
+            Some(&self.chain),
+            args,
+        )?;
+        Ok(output)
+    }
+
+    fn get_xpub(&self, path: &str, expert: bool) -> Result<String, Error> {
+        let args = vec!["getxpub", &path];
+
+        BinaryHWIImplementation::<T>::run_hwi_command(
+            self.device.as_ref(),
+            expert,
+            Some(&self.chain),
+            args,
+        )
+    }
+
+    fn sign_message(&self, message: &str, path: &str) -> Result<String, Error> {
+        let args = vec!["signmessage", message, path];
+
+        BinaryHWIImplementation::<T>::run_hwi_command(
+            self.device.as_ref(),
+            self.expert,
+            Some(&self.chain),
+            args,
+        )
+    }
+
+    fn get_keypool(
+        &self,
+        keypool: bool,
+        internal: bool,
+        addr_type: HWIAddressType,
+        addr_all: bool,
+        account: u32,
+        path: Option<String>,
+        start: u32,
+        end: u32,
+    ) -> Result<String, Error> {
+        let mut args = vec!["getkeypool"];
+
+        if keypool {
+            args.push("--keypool");
+        }
+        if internal {
+            args.push("--internal");
+        }
+        let addrtype_str = addr_type.to_string();
+        args.extend_from_slice(&["--addr-type", &addrtype_str]);
+        if addr_all {
+            args.push("--addr-all");
+        }
+        let account_str = account.to_string();
+        args.extend_from_slice(&["--account", &account_str]);
+        if let Some(p) = path.as_deref() {
+            args.extend_from_slice(&["--path", p]);
+        }
+        let start_str = start.to_string();
+        args.push(&start_str);
+        let end_str = end.to_string();
+        args.push(&end_str);
+
+        BinaryHWIImplementation::<T>::run_hwi_command(
+            self.device.as_ref(),
+            self.expert,
+            Some(&self.chain),
+            args,
+        )
+    }
+
+    fn get_descriptors(&self, account: u32) -> Result<String, Error> {
+        let mut args = vec!["getdescriptors"];
+        let account_str = account.to_string();
+        args.extend_from_slice(&["--account", &account_str]);
+
+        BinaryHWIImplementation::<T>::run_hwi_command(
+            self.device.as_ref(),
+            self.expert,
+            Some(&self.chain),
+            args,
+        )
+    }
+
+    fn display_address_with_desc(&self, descriptor: &str) -> Result<String, Error> {
+        let mut args = vec!["displayaddress"];
+        args.push("--desc");
+        args.push(descriptor);
+
+        BinaryHWIImplementation::<T>::run_hwi_command(
+            self.device.as_ref(),
+            self.expert,
+            Some(&self.chain),
+            args,
+        )
+    }
+
+    fn display_address_with_path(
+        &self,
+        path: &str,
+        address_type: HWIAddressType,
+    ) -> Result<String, Error> {
+        let mut args = vec!["displayaddress"];
+        args.extend_from_slice(&["--path", path]);
+        let addr_type_str = address_type.to_string();
+        args.extend_from_slice(&["--addr-type", &addr_type_str]);
+
+        BinaryHWIImplementation::<T>::run_hwi_command(
+            self.device.as_ref(),
+            self.expert,
+            Some(&self.chain),
+            args,
+        )
+    }
+
+    fn install_udev_rules(_: &str, location: &str) -> Result<String, Error> {
+        let mut args = vec!["installudevrules"];
+        args.extend_from_slice(&["--location", location]);
+
+        BinaryHWIImplementation::<T>::run_hwi_command(None, false, None, args)
+    }
+
+    fn set_log_level(_: LogLevel) -> Result<(), Error> {
+        Err(Error::NotImplemented)
+    }
+
+    fn toggle_passphrase(&self) -> Result<String, Error> {
+        let args = vec!["togglepassphrase"];
+        BinaryHWIImplementation::<T>::run_hwi_command(
+            self.device.as_ref(),
+            self.expert,
+            Some(&self.chain),
+            args,
+        )
+    }
+
+    fn setup_device(&self, label: &str, passphrase: &str) -> Result<String, Error> {
+        let mut args = vec!["setup"];
+        args.extend_from_slice(&["--label", label]);
+        args.extend_from_slice(&["--backup_passphrase", passphrase]);
+
+        BinaryHWIImplementation::<T>::run_hwi_command(
+            self.device.as_ref(),
+            self.expert,
+            Some(&self.chain),
+            args,
+        )
+    }
+
+    fn restore_device(&self, label: &str, word_count: u8) -> Result<String, Error> {
+        let mut args = vec!["restore"];
+        let word_count_str = word_count.to_string();
+        args.extend_from_slice(&["--word_count", &word_count_str]);
+        args.extend_from_slice(&["--label", label]);
+
+        BinaryHWIImplementation::<T>::run_hwi_command(
+            self.device.as_ref(),
+            self.expert,
+            Some(&self.chain),
+            args,
+        )
+    }
+    fn backup_device(&self, label: &str, backup_passphrase: &str) -> Result<String, Error> {
+        let mut args = vec!["backup"];
+        args.extend_from_slice(&["--label", label]);
+        args.extend_from_slice(&["--backup_passphrase", backup_passphrase]);
+
+        BinaryHWIImplementation::<T>::run_hwi_command(
+            self.device.as_ref(),
+            self.expert,
+            Some(&self.chain),
+            args,
+        )
+    }
+
+    fn wipe_device(&self) -> Result<String, Error> {
+        let args = vec!["wipe"];
+        BinaryHWIImplementation::<T>::run_hwi_command(
+            self.device.as_ref(),
+            self.expert,
+            Some(&self.chain),
+            args,
+        )
+    }
+
+    fn get_version() -> Result<String, Error> {
+        let args = vec!["--version"];
+        BinaryHWIImplementation::<T>::run_hwi_command(None, false, None, args)
+    }
+
+    fn install_hwilib(_: String) -> Result<(), Error> {
+        Err(Error::NotImplemented)
+    }
+}
+
+impl<T: HWIBinaryExecutor> BinaryHWIImplementation<T> {
+    fn run_hwi_command(
+        device: Option<&HWIDevice>,
+        expert: bool,
+        chain: Option<&HWIChain>,
+        args: Vec<&str>,
+    ) -> Result<String, Error> {
+        let mut command_args = Vec::new();
+
+        if !args.contains(&"enumerate") && !args.contains(&"--version") {
+            let fingerprint = device
+                .ok_or(Error::Hwi("Device fingerprint not set".to_string(), None))?
+                .fingerprint;
+            command_args.push("--fingerprint".to_string());
+            command_args.push(fingerprint.to_string());
+        }
+
+        if expert {
+            command_args.push("--expert".to_string());
+        }
+
+        if let Some(c) = chain {
+            command_args.push("--chain".to_string());
+            command_args.push(c.to_string());
+        }
+
+        command_args.extend(args.iter().map(|s| s.to_string()));
+
+        T::execute_command(command_args)
+    }
+}