Implement the config get subcommand

This change implements the config get subcommand. The subcommand reads
the device configuration and prints it.

2 files changed, 39 insertions, 2 deletions

diff --git a/nitrocli/src/args.rs b/nitrocli/src/args.rs
index 253d5a0..298b157 100644
--- a/nitrocli/src/args.rs
+++ b/nitrocli/src/args.rs
@@ -91,9 +91,9 @@ enum ConfigCommand {
 }
 
 impl ConfigCommand {
-  fn execute(&self, _args: Vec<String>) -> Result<()> {
+  fn execute(&self, args: Vec<String>) -> Result<()> {
     match *self {
-      ConfigCommand::Get => Err(Error::Error("Not implemented".to_string())),
+      ConfigCommand::Get => config_get(args),
     }
   }
 }
@@ -308,6 +308,15 @@ fn config(args: Vec<String>) -> Result<()> {
   subcommand.execute(subargs)
 }
 
+/// Read the Nitrokey configuration.
+fn config_get(args: Vec<String>) -> Result<()> {
+  let mut parser = argparse::ArgumentParser::new();
+  parser.set_description("Prints the Nitrokey configuration");
+  parse(&parser, args)?;
+
+  commands::config_get()
+}
+
 /// Execute an OTP subcommand.
 fn otp(args: Vec<String>) -> Result<()> {
   let mut subcommand = OtpCommand::Get;
diff --git a/nitrocli/src/commands.rs b/nitrocli/src/commands.rs
index 528fa99..8ce1076 100644
--- a/nitrocli/src/commands.rs
+++ b/nitrocli/src/commands.rs
@@ -17,6 +17,7 @@
 // * along with this program.  If not, see <http://www.gnu.org/licenses/>. *
 // *************************************************************************
 
+use std::fmt;
 use std::result;
 
 use nitrokey::ConfigureOtp;
@@ -276,6 +277,33 @@ pub fn clear() -> Result<()> {
   Ok(())
 }
 
+/// Return a String representation of the given Option.
+fn format_option<T: fmt::Display>(option: Option<T>) -> String {
+  match option {
+    Some(value) => format!("{}", value),
+    None => "not set".to_string(),
+  }
+}
+
+/// Read the Nitrokey configuration.
+pub fn config_get() -> Result<()> {
+  let config = get_device()?
+    .get_config()
+    .map_err(|err| get_error("Could not get configuration", &err))?;
+  println!(
+    r#"Config:
+  numlock binding:          {nl}
+  capslock binding:         {cl}
+  scrollock binding:        {sl}
+  require user PIN for OTP: {otp}"#,
+    nl = format_option(config.numlock),
+    cl = format_option(config.capslock),
+    sl = format_option(config.scrollock),
+    otp = config.user_password,
+  );
+  Ok(())
+}
+
 fn get_otp<T: GenerateOtp>(slot: u8, algorithm: args::OtpAlgorithm, device: &T) -> Result<String> {
   match algorithm {
     args::OtpAlgorithm::Hotp => device.get_hotp_code(slot),