1/*
2 * Copyright (C) 2014 Igalia S.L.
3 * Copyright (C) 2016 SoftAtHome
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
15 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
16 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
18 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
19 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
20 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
21 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
22 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
23 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
24 * THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "config.h"
28#include "CryptoDigest.h"
29
30#include <gcrypt.h>
31
32namespace PAL {
33
34struct CryptoDigestContext {
35 int algorithm;
36 gcry_md_hd_t md;
37};
38
39CryptoDigest::CryptoDigest()
40 : m_context(new CryptoDigestContext)
41{
42}
43
44CryptoDigest::~CryptoDigest() = default;
45
46std::unique_ptr<CryptoDigest> CryptoDigest::create(CryptoDigest::Algorithm algorithm)
47{
48 int gcryptAlgorithm;
49
50 switch (algorithm) {
51 case CryptoDigest::Algorithm::SHA_1:
52 gcryptAlgorithm = GCRY_MD_SHA1;
53 break;
54 case CryptoDigest::Algorithm::SHA_224:
55 gcryptAlgorithm = GCRY_MD_SHA224;
56 break;
57 case CryptoDigest::Algorithm::SHA_256:
58 gcryptAlgorithm = GCRY_MD_SHA256;
59 break;
60 case CryptoDigest::Algorithm::SHA_384:
61 gcryptAlgorithm = GCRY_MD_SHA384;
62 break;
63 case CryptoDigest::Algorithm::SHA_512:
64 gcryptAlgorithm = GCRY_MD_SHA512;
65 break;
66 }
67
68 std::unique_ptr<CryptoDigest> digest(new CryptoDigest);
69 digest->m_context->algorithm = gcryptAlgorithm;
70
71 gcry_md_open(&digest->m_context->md, gcryptAlgorithm, 0);
72 if (!digest->m_context->md)
73 return nullptr;
74
75 return digest;
76}
77
78void CryptoDigest::addBytes(const void* input, size_t length)
79{
80 gcry_md_write(m_context->md, input, length);
81}
82
83Vector<uint8_t> CryptoDigest::computeHash()
84{
85 int digestLen = gcry_md_get_algo_dlen(m_context->algorithm);
86 Vector<uint8_t> result(digestLen);
87
88 gcry_md_final(m_context->md);
89 memcpy(result.data(), gcry_md_read(m_context->md, 0), digestLen);
90 gcry_md_close(m_context->md);
91
92 return result;
93}
94
95} // namespace PAL
96