Add hkdf::Prk::expand_to_secret()

briansmith · Aug 23, 2019 · 5212a82 · 5212a82
1 parent 63c0364
commit 5212a82
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/src/hkdf.rs b/src/hkdf.rs
@@ -136,6 +136,15 @@ impl Prk {
             len_cached,
         })
     }
+
+    /// Expand the `Prk` directly to target secret type
+    pub fn expand_to_secret<L, K>(&self, info: &[&[u8]], len: L) -> Result<K, error::Unspecified>
+    where
+        L: KeyType,
+        K: for<'a> From<Okm<'a, L>>,
+    {
+        Ok(self.expand(info, len)?.into())
+    }
 }
 
 impl From<Okm<'_, Algorithm>> for Prk {