openpgp: Use high-level interface to create direct key signature.

1 files changed, 3 insertions, 7 deletions

diff --git a/openpgp/src/cert/revoke.rs b/openpgp/src/cert/revoke.rs
index 605c61c3..c0f321db 100644
--- a/openpgp/src/cert/revoke.rs
+++ b/openpgp/src/cert/revoke.rs
@@ -9,7 +9,6 @@ use crate::{
 use crate::types::{
     ReasonForRevocation,
 };
-use crate::crypto::hash::Hash;
 use crate::crypto::Signer;
 use crate::packet::{
     Key,
@@ -227,12 +226,9 @@ impl CertRevocationBuilder {
         -> Result<Signature>
         where H: Into<Option<HashAlgorithm>>
     {
-        let hash_algo = hash_algo.into().unwrap_or(HashAlgorithm::SHA512);
-        let mut hash = hash_algo.context()?;
-
-        cert.primary_key().hash(&mut hash);
-
-        self.builder.sign_hash(signer, hash)
+        self.builder
+            .set_hash_algo(hash_algo.into().unwrap_or(HashAlgorithm::SHA512))
+            .sign_direct_key(signer, cert.primary_key().key())
     }
 }