From 1ddc1dd61b45b41801c1d1c364cd6789314cb8f3 Mon Sep 17 00:00:00 2001
From: Justus Winter <justus@sequoia-pgp.org>
Date: Tue, 19 Nov 2019 15:50:23 +0100
Subject: openpgp: Use the builder pattern for stream::Signer.

  - See #375.
---
 openpgp/src/crypto/asymmetric.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'openpgp/src/crypto/asymmetric.rs')

diff --git a/openpgp/src/crypto/asymmetric.rs b/openpgp/src/crypto/asymmetric.rs
index 9232bd14..144bcc4c 100644
--- a/openpgp/src/crypto/asymmetric.rs
+++ b/openpgp/src/crypto/asymmetric.rs
@@ -27,6 +27,17 @@ pub trait Signer<R>
             -> Result<mpis::Signature>;
 }
 
+impl<R: key::KeyRole> Signer<R> for Box<dyn Signer<R>> {
+    fn public(&self) -> &Key<key::PublicParts, R> {
+        self.as_ref().public()
+    }
+
+    fn sign(&mut self, hash_algo: HashAlgorithm, digest: &[u8])
+            -> Result<mpis::Signature> {
+        self.as_mut().sign(hash_algo, digest)
+    }
+}
+
 /// Decrypts a message.
 ///
 /// This is a low-level mechanism to decrypt an arbitrary OpenPGP
-- 
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