Implement the pin set command

This change implements the pin set command which can be used to change
a Nitrokey's user or admin PIN.

1 files changed, 27 insertions, 0 deletions

diff --git a/nitrocli/src/pinentry.rs b/nitrocli/src/pinentry.rs
index 33b5266..0d9fc5f 100644
--- a/nitrocli/src/pinentry.rs
+++ b/nitrocli/src/pinentry.rs
@@ -17,7 +17,9 @@
 // * along with this program.  If not, see <http://www.gnu.org/licenses/>. *
 // *************************************************************************
 
+use std::fmt;
 use std::process;
+use std::str;
 
 use crate::error::Error;
 
@@ -33,6 +35,31 @@ pub enum PinType {
   User,
 }
 
+impl fmt::Display for PinType {
+  fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+    write!(
+      f,
+      "{}",
+      match *self {
+        PinType::Admin => "admin",
+        PinType::User => "user",
+      }
+    )
+  }
+}
+
+impl str::FromStr for PinType {
+  type Err = ();
+
+  fn from_str(s: &str) -> Result<Self, Self::Err> {
+    match s {
+      "admin" => Ok(PinType::Admin),
+      "user" => Ok(PinType::User),
+      _ => Err(()),
+    }
+  }
+}
+
 impl PinType {
   fn cache_id(self) -> &'static str {
     match self {