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diff --git a/vendor/crypto-hash/src/imp/openssl.rs b/vendor/crypto-hash/src/imp/openssl.rs
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+++ b/vendor/crypto-hash/src/imp/openssl.rs
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+// Copyright (c) 2015, 2016 Mark Lee
+//
+// 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.
+
+//! A cryptographic hash digest generator dependent upon `OpenSSL`.
+
+#![warn(missing_docs)]
+
+use super::Algorithm;
+use openssl::hash;
+use std::io;
+
+/// Generator of digests using a cryptographic hash function.
+///
+/// # Examples
+///
+/// ```rust
+/// use crypto_hash::{Algorithm, Hasher};
+/// use std::io::Write;
+///
+/// let mut hasher = Hasher::new(Algorithm::SHA256);
+/// hasher.write_all(b"crypto");
+/// hasher.write_all(b"-");
+/// hasher.write_all(b"hash");
+/// let result = hasher.finish();
+/// let expected =
+///     b"\xfd\x1a\xfb`\"\xcdMG\xc8\x90\x96\x1cS9(\xea\xcf\xe8!\x9f\x1b%$\xf7\xfb*a\x84}\xdf\x8c'"
+///     .to_vec();
+/// assert_eq!(expected, result)
+/// ```
+pub struct Hasher(hash::Hasher);
+
+impl Hasher {
+    /// Create a new `Hasher` for the given `Algorithm`.
+    pub fn new(algorithm: Algorithm) -> Hasher {
+        let hash_type = match algorithm {
+            Algorithm::MD5 => hash::MessageDigest::md5(),
+            Algorithm::SHA1 => hash::MessageDigest::sha1(),
+            Algorithm::SHA256 => hash::MessageDigest::sha256(),
+            Algorithm::SHA512 => hash::MessageDigest::sha512(),
+        };
+
+        match hash::Hasher::new(hash_type) {
+            Ok(hasher) => Hasher(hasher),
+            Err(error_stack) => panic!("OpenSSL error(s): {}", error_stack),
+        }
+    }
+
+    /// Generate a digest from the data written to the `Hasher`.
+    pub fn finish(&mut self) -> Vec<u8> {
+        let Hasher(ref mut hasher) = *self;
+        match hasher.finish() {
+            Ok(digest) => digest.to_vec(),
+            Err(error_stack) => panic!("OpenSSL error(s): {}", error_stack),
+        }
+    }
+}
+
+impl io::Write for Hasher {
+    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+        let Hasher(ref mut hasher) = *self;
+        hasher.write(buf)
+    }
+
+    fn flush(&mut self) -> io::Result<()> {
+        let Hasher(ref mut hasher) = *self;
+        hasher.flush()
+    }
+}