From a8143dc0ec29bff92787be1abfa580109cca139c Mon Sep 17 00:00:00 2001
From: Jesse Luehrs <doy@tozt.net>
Date: Wed, 13 May 2015 19:01:04 -0400
Subject: this also needs to allow user-specified length

---
 src/sha1.rs | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/src/sha1.rs b/src/sha1.rs
index e2c86b1..24186ea 100644
--- a/src/sha1.rs
+++ b/src/sha1.rs
@@ -9,15 +9,16 @@ pub fn sha1 (bytes: &[u8]) -> [u8; 20] {
             0x98BADCFE,
             0x10325476,
             0xC3D2E1F0,
-        ]
+        ],
+        bytes.len() as u64
     )
 }
 
-pub fn pad_sha1 (bytes: &[u8]) -> Vec<u8> {
+pub fn pad_sha1 (bytes: &[u8], len: u64) -> Vec<u8> {
     return bytes
         .iter()
         .map(|x| *x)
-        .chain(sha1_padding(bytes.len() as u64))
+        .chain(sha1_padding(len))
         .collect();
 }
 
@@ -34,8 +35,8 @@ pub fn sha1_padding (len: u64) -> Vec<u8> {
         .collect();
 }
 
-pub fn sha1_with_state (bytes: &[u8], mut h: [u32; 5]) -> [u8; 20] {
-    for chunk in pad_sha1(bytes).chunks(64) {
+pub fn sha1_with_state (bytes: &[u8], mut h: [u32; 5], len: u64) -> [u8; 20] {
+    for chunk in pad_sha1(bytes, len).chunks(64) {
         let chunk_words: &[u32; 16] = unsafe {
             ::std::mem::transmute(chunk.as_ptr())
         };
-- 
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