openpgp: Add conversions from &KeyHandle to KeyID and Fingerprint.

1 files changed, 20 insertions, 0 deletions

diff --git a/openpgp/src/keyhandle.rs b/openpgp/src/keyhandle.rs
index 88a9acde..c5058b9d 100644
--- a/openpgp/src/keyhandle.rs
+++ b/openpgp/src/keyhandle.rs
@@ -51,6 +51,15 @@ impl From<KeyHandle> for KeyID {
     }
 }
 
+impl From<&KeyHandle> for KeyID {
+    fn from(i: &KeyHandle) -> Self {
+        match i {
+            KeyHandle::Fingerprint(i) => i.clone().into(),
+            KeyHandle::KeyID(i) => i.clone(),
+        }
+    }
+}
+
 impl From<Fingerprint> for KeyHandle {
     fn from(i: Fingerprint) -> Self {
         KeyHandle::Fingerprint(i)
@@ -74,6 +83,17 @@ impl TryFrom<KeyHandle> for Fingerprint {
     }
 }
 
+impl TryFrom<&KeyHandle> for Fingerprint {
+    type Error = failure::Error;
+    fn try_from(i: &KeyHandle) -> Result<Self> {
+        match i {
+            KeyHandle::Fingerprint(i) => Ok(i.clone()),
+            KeyHandle::KeyID(i) => Err(Error::InvalidOperation(
+                format!("Cannot convert keyid {} to fingerprint", i)).into()),
+        }
+    }
+}
+
 impl PartialOrd for KeyHandle {
     fn partial_cmp(&self, other: &KeyHandle) -> Option<Ordering> {
         let a = self.as_slice();