Use postgres_protocol for md5 hashing

THIRD_PARTY

@@ -57,34 +57,3 @@ CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
 IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 DEALINGS IN THE SOFTWARE.
-
--------------------------------------------------------------------------------
-
-* src/md5.rs has been copied from rust-crypto
-
-Copyright (c) 2006-2009 Graydon Hoare
-Copyright (c) 2009-2013 Mozilla Foundation
-
-Permission is hereby granted, free of charge, to any
-person obtaining a copy of this software and associated
-documentation files (the "Software"), to deal in the
-Software without restriction, including without
-limitation the rights to use, copy, modify, merge,
-publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software
-is furnished to do so, subject to the following
-conditions:
-
-The above copyright notice and this permission notice
-shall be included in all copies or substantial portions
-of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
-ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
-TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
-PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
-SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
-CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
-IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-DEALINGS IN THE SOFTWARE.

src/lib.rs

@@ -51,7 +51,6 @@ extern crate log;
 extern crate phf;
 extern crate postgres_protocol;
 
-use md5::Md5;
 use std::cell::{Cell, RefCell};
 use std::collections::{VecDeque, HashMap};
 use std::fmt;
@@ -61,6 +60,7 @@ use std::mem;
 use std::result;
 use std::sync::Arc;
 use std::time::Duration;
+use postgres_protocol::authentication;
 use postgres_protocol::message::backend::{self, RowDescriptionEntry};
 use postgres_protocol::message::frontend;
 
@@ -78,7 +78,6 @@ use types::{IsNull, Kind, Type, SessionInfo, Oid, Other, WrongType, ToSql, FromS
 mod macros;
 
 mod feature_check;
-mod md5;
 mod priv_io;
 mod url;
 pub mod error;
@@ -382,14 +381,7 @@ impl InnerConnection {
                 let pass = try!(user.password.ok_or_else(|| {
                     ConnectError::ConnectParams("a password was requested but not provided".into())
                 }));
-                let mut hasher = Md5::new();
-                hasher.input(pass.as_bytes());
-                hasher.input(user.user.as_bytes());
-                let output = hasher.result_str();
-                hasher.reset();
-                hasher.input(output.as_bytes());
-                hasher.input(&salt);
-                let output = format!("md5{}", hasher.result_str());
+                let output = authentication::md5_hash(user.user.as_bytes(), pass.as_bytes(), salt);
                 try!(self.stream.write_message(&frontend::PasswordMessage { password: &output }));
                 try!(self.stream.flush());
             }