1/**************************************************************************/
2/* hashing_context.cpp */
3/**************************************************************************/
4/* This file is part of: */
5/* GODOT ENGINE */
6/* https://godotengine.org */
7/**************************************************************************/
8/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
9/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
10/* */
11/* Permission is hereby granted, free of charge, to any person obtaining */
12/* a copy of this software and associated documentation files (the */
13/* "Software"), to deal in the Software without restriction, including */
14/* without limitation the rights to use, copy, modify, merge, publish, */
15/* distribute, sublicense, and/or sell copies of the Software, and to */
16/* permit persons to whom the Software is furnished to do so, subject to */
17/* the following conditions: */
18/* */
19/* The above copyright notice and this permission notice shall be */
20/* included in all copies or substantial portions of the Software. */
21/* */
22/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
23/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
24/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
25/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
26/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
27/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
28/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
29/**************************************************************************/
30
31#include "hashing_context.h"
32
33#include "core/crypto/crypto_core.h"
34
35Error HashingContext::start(HashType p_type) {
36 ERR_FAIL_COND_V(ctx != nullptr, ERR_ALREADY_IN_USE);
37 _create_ctx(p_type);
38 ERR_FAIL_NULL_V(ctx, ERR_UNAVAILABLE);
39 switch (type) {
40 case HASH_MD5:
41 return ((CryptoCore::MD5Context *)ctx)->start();
42 case HASH_SHA1:
43 return ((CryptoCore::SHA1Context *)ctx)->start();
44 case HASH_SHA256:
45 return ((CryptoCore::SHA256Context *)ctx)->start();
46 }
47 return ERR_UNAVAILABLE;
48}
49
50Error HashingContext::update(PackedByteArray p_chunk) {
51 ERR_FAIL_NULL_V(ctx, ERR_UNCONFIGURED);
52 size_t len = p_chunk.size();
53 ERR_FAIL_COND_V(len == 0, FAILED);
54 const uint8_t *r = p_chunk.ptr();
55 switch (type) {
56 case HASH_MD5:
57 return ((CryptoCore::MD5Context *)ctx)->update(&r[0], len);
58 case HASH_SHA1:
59 return ((CryptoCore::SHA1Context *)ctx)->update(&r[0], len);
60 case HASH_SHA256:
61 return ((CryptoCore::SHA256Context *)ctx)->update(&r[0], len);
62 }
63 return ERR_UNAVAILABLE;
64}
65
66PackedByteArray HashingContext::finish() {
67 ERR_FAIL_NULL_V(ctx, PackedByteArray());
68 PackedByteArray out;
69 Error err = FAILED;
70 switch (type) {
71 case HASH_MD5:
72 out.resize(16);
73 err = ((CryptoCore::MD5Context *)ctx)->finish(out.ptrw());
74 break;
75 case HASH_SHA1:
76 out.resize(20);
77 err = ((CryptoCore::SHA1Context *)ctx)->finish(out.ptrw());
78 break;
79 case HASH_SHA256:
80 out.resize(32);
81 err = ((CryptoCore::SHA256Context *)ctx)->finish(out.ptrw());
82 break;
83 }
84 _delete_ctx();
85 ERR_FAIL_COND_V(err != OK, PackedByteArray());
86 return out;
87}
88
89void HashingContext::_create_ctx(HashType p_type) {
90 type = p_type;
91 switch (type) {
92 case HASH_MD5:
93 ctx = memnew(CryptoCore::MD5Context);
94 break;
95 case HASH_SHA1:
96 ctx = memnew(CryptoCore::SHA1Context);
97 break;
98 case HASH_SHA256:
99 ctx = memnew(CryptoCore::SHA256Context);
100 break;
101 default:
102 ctx = nullptr;
103 }
104}
105
106void HashingContext::_delete_ctx() {
107 switch (type) {
108 case HASH_MD5:
109 memdelete((CryptoCore::MD5Context *)ctx);
110 break;
111 case HASH_SHA1:
112 memdelete((CryptoCore::SHA1Context *)ctx);
113 break;
114 case HASH_SHA256:
115 memdelete((CryptoCore::SHA256Context *)ctx);
116 break;
117 }
118 ctx = nullptr;
119}
120
121void HashingContext::_bind_methods() {
122 ClassDB::bind_method(D_METHOD("start", "type"), &HashingContext::start);
123 ClassDB::bind_method(D_METHOD("update", "chunk"), &HashingContext::update);
124 ClassDB::bind_method(D_METHOD("finish"), &HashingContext::finish);
125 BIND_ENUM_CONSTANT(HASH_MD5);
126 BIND_ENUM_CONSTANT(HASH_SHA1);
127 BIND_ENUM_CONSTANT(HASH_SHA256);
128}
129
130HashingContext::~HashingContext() {
131 if (ctx != nullptr) {
132 _delete_ctx();
133 }
134}
135