Add Debug impl for EcKey

openssl/src/ec.rs

@@ -34,6 +34,7 @@
 use ffi;
 use foreign_types::{ForeignType, ForeignTypeRef};
 use libc::c_int;
+use std::fmt;
 use std::ptr;
 
 use bn::{BigNumContextRef, BigNumRef};
@@ -825,6 +826,12 @@ impl<T> Clone for EcKey<T> {
     }
 }
 
+impl<T> fmt::Debug for EcKey<T> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "EcKey")
+    }
+}
+
 #[cfg(test)]
 mod test {
     use hex::FromHex;