1/*
2 *  Copyright 2012 The WebRTC Project Authors. All rights reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11#ifndef WEBRTC_BASE_SHA1DIGEST_H_
12#define WEBRTC_BASE_SHA1DIGEST_H_
13
14#include "webrtc/base/messagedigest.h"
15#include "webrtc/base/sha1.h"
16
17namespace rtc {
18
19// A simple wrapper for our SHA-1 implementation.
20class Sha1Digest : public MessageDigest {
21 public:
22  enum { kSize = SHA1_DIGEST_SIZE };
23  Sha1Digest() {
24    SHA1Init(&ctx_);
25  }
26  virtual size_t Size() const {
27    return kSize;
28  }
29  virtual void Update(const void* buf, size_t len) {
30    SHA1Update(&ctx_, static_cast<const uint8*>(buf), len);
31  }
32  virtual size_t Finish(void* buf, size_t len) {
33    if (len < kSize) {
34      return 0;
35    }
36    SHA1Final(&ctx_, static_cast<uint8*>(buf));
37    SHA1Init(&ctx_);  // Reset for next use.
38    return kSize;
39  }
40
41 private:
42  SHA1_CTX ctx_;
43};
44
45}  // namespace rtc
46
47#endif  // WEBRTC_BASE_SHA1DIGEST_H_
48