1 files changed, 10 insertions, 1 deletions
diff --git a/openssl/src/pkey.rs b/openssl/src/pkey.rs
index 6236b642..4885ad3c 100644
--- a/openssl/src/pkey.rs
+++ b/openssl/src/pkey.rs
@@ -40,7 +40,7 @@ impl Ref<PKey> {
         Ok(mem_bio.get_buf().to_owned())
     }
 
-    /// Stores public key as a PEM
+    /// Encode public key in PEM format
     pub fn public_key_to_pem(&self) -> Result<Vec<u8>, ErrorStack> {
         let mem_bio = try!(MemBio::new());
         unsafe {
@@ -49,6 +49,15 @@ impl Ref<PKey> {
         Ok(mem_bio.get_buf().to_owned())
     }
 
+    /// Encode public key in DER format
+    pub fn public_key_to_der(&self) -> Result<Vec<u8>, ErrorStack> {
+        let mem_bio = try!(MemBio::new());
+        unsafe {
+            try!(cvt(ffi::i2d_PUBKEY_bio(mem_bio.as_ptr(), self.as_ptr())));
+        }
+        Ok(mem_bio.get_buf().to_owned())
+    }
+
     pub fn public_eq(&self, other: &Ref<PKey>) -> bool {
         unsafe { ffi::EVP_PKEY_cmp(self.as_ptr(), other.as_ptr()) == 1 }
     }