openpgp: Allow formatting KeyID with X and x

1 files changed, 21 insertions, 0 deletions

diff --git a/openpgp/src/keyid.rs b/openpgp/src/keyid.rs
index 1224a70c..44619252 100644
--- a/openpgp/src/keyid.rs
+++ b/openpgp/src/keyid.rs
@@ -20,6 +20,20 @@ impl fmt::Debug for KeyID {
     }
 }
 
+impl fmt::UpperHex for KeyID {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        f.write_str(&self.convert_to_string(false))
+    }
+}
+
+impl fmt::LowerHex for KeyID {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let mut hex = self.convert_to_string(false);
+        hex.make_ascii_lowercase();
+        f.write_str(&hex)
+    }
+}
+
 impl std::str::FromStr for KeyID {
     type Err = anyhow::Error;
 
@@ -240,6 +254,13 @@ mod test {
     }
 
     #[test]
+    fn hex_formatting() {
+        let keyid = KeyID::from_hex("FB3751F1587DAEF1").unwrap();
+        assert_eq!(format!("{:X}", keyid), "FB3751F1587DAEF1");
+        assert_eq!(format!("{:x}", keyid), "fb3751f1587daef1");
+    }
+
+    #[test]
     fn keyid_is_send_and_sync() {
         fn f<T: Send + Sync>(_: T) {}
         f(KeyID::from_hex("89AB CDEF 0123 4567").unwrap());