1/*
2 * libjingle
3 * Copyright 2012 Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 *  1. Redistributions of source code must retain the above copyright notice,
9 *     this list of conditions and the following disclaimer.
10 *  2. Redistributions in binary form must reproduce the above copyright notice,
11 *     this list of conditions and the following disclaimer in the documentation
12 *     and/or other materials provided with the distribution.
13 *  3. The name of the author may not be used to endorse or promote products
14 *     derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#ifndef TALK_BASE_SHA1DIGEST_H_
29#define TALK_BASE_SHA1DIGEST_H_
30
31#include "talk/base/messagedigest.h"
32#include "talk/base/sha1.h"
33
34namespace talk_base {
35
36// A simple wrapper for our SHA-1 implementation.
37class Sha1Digest : public MessageDigest {
38 public:
39  enum { kSize = SHA1_DIGEST_SIZE };
40  Sha1Digest() {
41    SHA1Init(&ctx_);
42  }
43  virtual size_t Size() const {
44    return kSize;
45  }
46  virtual void Update(const void* buf, size_t len) {
47    SHA1Update(&ctx_, static_cast<const uint8*>(buf), len);
48  }
49  virtual size_t Finish(void* buf, size_t len) {
50    if (len < kSize) {
51      return 0;
52    }
53    SHA1Final(&ctx_, static_cast<uint8*>(buf));
54    SHA1Init(&ctx_);  // Reset for next use.
55    return kSize;
56  }
57
58 private:
59  SHA1_CTX ctx_;
60};
61
62}  // namespace talk_base
63
64#endif  // TALK_BASE_SHA1DIGEST_H_
65