1/*
2 * Copyright (C) 2011 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#pragma once
32
33#include <array>
34#include <wtf/Vector.h>
35#include <wtf/text/CString.h>
36
37#if PLATFORM(COCOA)
38#include <CommonCrypto/CommonDigest.h>
39#endif
40
41namespace WTF {
42
43class SHA1 {
44 WTF_MAKE_FAST_ALLOCATED;
45public:
46 WTF_EXPORT_PRIVATE SHA1();
47
48 void addBytes(const Vector<uint8_t>& input)
49 {
50 addBytes(input.data(), input.size());
51 }
52 void addBytes(const CString& input)
53 {
54 const char* string = input.data();
55 addBytes(reinterpret_cast<const uint8_t*>(string), input.length());
56 }
57 WTF_EXPORT_PRIVATE void addBytes(const uint8_t* input, size_t length);
58
59 // Size of the SHA1 hash
60 WTF_EXPORT_PRIVATE static constexpr size_t hashSize = 20;
61
62 // type for computing SHA1 hash
63 typedef std::array<uint8_t, hashSize> Digest;
64
65 WTF_EXPORT_PRIVATE void computeHash(Digest&);
66
67 // Get a hex hash from the digest.
68 WTF_EXPORT_PRIVATE static CString hexDigest(const Digest&);
69
70 // Compute the hex digest directly.
71 WTF_EXPORT_PRIVATE CString computeHexDigest();
72
73private:
74#if PLATFORM(COCOA)
75 CC_SHA1_CTX m_context;
76#else
77 void finalize();
78 void processBlock();
79 void reset();
80
81 uint8_t m_buffer[64];
82 size_t m_cursor; // Number of bytes filled in m_buffer (0-64).
83 uint64_t m_totalBytes; // Number of bytes added so far.
84 uint32_t m_hash[5];
85#endif
86};
87
88} // namespace WTF
89
90using WTF::SHA1;
91