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qmessageauthenticationcode.cpp

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1/****************************************************************************-
2**-
3** Copyright (C) 2013 Ruslan Nigmatullin <euroelessar@yandex.ru>-
4** Contact: https://www.qt.io/licensing/-
5**-
6** This file is part of the QtCore module of the Qt Toolkit.-
7**-
8** $QT_BEGIN_LICENSE:LGPL$-
9** Commercial License Usage-
10** Licensees holding valid commercial Qt licenses may use this file in-
11** accordance with the commercial license agreement provided with the-
12** Software or, alternatively, in accordance with the terms contained in-
13** a written agreement between you and The Qt Company. For licensing terms-
14** and conditions see https://www.qt.io/terms-conditions. For further-
15** information use the contact form at https://www.qt.io/contact-us.-
16**-
17** GNU Lesser General Public License Usage-
18** Alternatively, this file may be used under the terms of the GNU Lesser-
19** General Public License version 3 as published by the Free Software-
20** Foundation and appearing in the file LICENSE.LGPL3 included in the-
21** packaging of this file. Please review the following information to-
22** ensure the GNU Lesser General Public License version 3 requirements-
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.-
24**-
25** GNU General Public License Usage-
26** Alternatively, this file may be used under the terms of the GNU-
27** General Public License version 2.0 or (at your option) the GNU General-
28** Public license version 3 or any later version approved by the KDE Free-
29** Qt Foundation. The licenses are as published by the Free Software-
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3-
31** included in the packaging of this file. Please review the following-
32** information to ensure the GNU General Public License requirements will-
33** be met: https://www.gnu.org/licenses/gpl-2.0.html and-
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35**-
36** $QT_END_LICENSE$-
37**-
38****************************************************************************/-
39-
40#include "qmessageauthenticationcode.h"-
41#include "qvarlengtharray.h"-
42-
43/*-
44 These #defines replace the typedefs needed by the RFC6234 code. Normally-
45 the typedefs would come from from stdint.h, but since this header is not-
46 available on all platforms (MSVC 2008, for example), we #define them to the-
47 Qt equivalents.-
48*/-
49-
50#ifdef uint64_t-
51#undef uint64_t-
52#endif-
53-
54#define uint64_t QT_PREPEND_NAMESPACE(quint64)-
55-
56#ifdef uint32_t-
57#undef uint32_t-
58#endif-
59-
60#define uint32_t QT_PREPEND_NAMESPACE(quint32)-
61-
62#ifdef uint8_t-
63#undef uint8_t-
64#endif-
65-
66#define uint8_t QT_PREPEND_NAMESPACE(quint8)-
67-
68#ifdef int_least16_t-
69#undef int_least16_t-
70#endif-
71-
72#define int_least16_t QT_PREPEND_NAMESPACE(qint16)-
73-
74// Header from rfc6234 with 1 modification:-
75// sha1.h - commented out '#include <stdint.h>' on line 74-
76#include "../../3rdparty/rfc6234/sha.h"-
77-
78#undef uint64_t-
79#undef uint32_t-
80#undef uint68_t-
81#undef int_least16_t-
82-
83QT_BEGIN_NAMESPACE-
84-
85static int qt_hash_block_size(QCryptographicHash::Algorithm method)-
86{-
87 switch (method) {-
88 case QCryptographicHash::Md4:
never executed: case QCryptographicHash::Md4:
0
89 return 64;
never executed: return 64;
0
90 case QCryptographicHash::Md5:
executed 20 times by 1 test: case QCryptographicHash::Md5:
Executed by:
  • tst_QMessageAuthenticationCode
20
91 return 64;
executed 20 times by 1 test: return 64;
Executed by:
  • tst_QMessageAuthenticationCode
20
92 case QCryptographicHash::Sha1:
executed 8 times by 1 test: case QCryptographicHash::Sha1:
Executed by:
  • tst_QMessageAuthenticationCode
8
93 return SHA1_Message_Block_Size;
executed 8 times by 1 test: return SHA1_Message_Block_Size;
Executed by:
  • tst_QMessageAuthenticationCode
8
94 case QCryptographicHash::Sha224:
never executed: case QCryptographicHash::Sha224:
0
95 return SHA224_Message_Block_Size;
never executed: return SHA224_Message_Block_Size;
0
96 case QCryptographicHash::Sha256:
executed 8 times by 1 test: case QCryptographicHash::Sha256:
Executed by:
  • tst_QMessageAuthenticationCode
8
97 return SHA256_Message_Block_Size;
executed 8 times by 1 test: return SHA256_Message_Block_Size;
Executed by:
  • tst_QMessageAuthenticationCode
8
98 case QCryptographicHash::Sha384:
never executed: case QCryptographicHash::Sha384:
0
99 return SHA384_Message_Block_Size;
never executed: return SHA384_Message_Block_Size;
0
100 case QCryptographicHash::Sha512:
never executed: case QCryptographicHash::Sha512:
0
101 return SHA512_Message_Block_Size;
never executed: return SHA512_Message_Block_Size;
0
102 case QCryptographicHash::Sha3_224:
never executed: case QCryptographicHash::Sha3_224:
0
103 return 144;
never executed: return 144;
0
104 case QCryptographicHash::Sha3_256:
never executed: case QCryptographicHash::Sha3_256:
0
105 return 136;
never executed: return 136;
0
106 case QCryptographicHash::Sha3_384:
never executed: case QCryptographicHash::Sha3_384:
0
107 return 104;
never executed: return 104;
0
108 case QCryptographicHash::Sha3_512:
never executed: case QCryptographicHash::Sha3_512:
0
109 return 72;
never executed: return 72;
0
110 }-
111 return 0;
never executed: return 0;
0
112}-
113-
114class QMessageAuthenticationCodePrivate-
115{-
116public:-
117 QMessageAuthenticationCodePrivate(QCryptographicHash::Algorithm m)-
118 : messageHash(m), method(m), messageHashInited(false)-
119 {-
120 }
executed 18 times by 1 test: end of block
Executed by:
  • tst_QMessageAuthenticationCode
18
121-
122 QByteArray key;-
123 QByteArray result;-
124 QCryptographicHash messageHash;-
125 QCryptographicHash::Algorithm method;-
126 bool messageHashInited;-
127-
128 void initMessageHash();-
129};-
130-
131void QMessageAuthenticationCodePrivate::initMessageHash()-
132{-
133 if (messageHashInited)
messageHashInitedDescription
TRUEevaluated 27 times by 1 test
Evaluated by:
  • tst_QMessageAuthenticationCode
FALSEevaluated 18 times by 1 test
Evaluated by:
  • tst_QMessageAuthenticationCode
18-27
134 return;
executed 27 times by 1 test: return;
Executed by:
  • tst_QMessageAuthenticationCode
27
135 messageHashInited = true;-
136-
137 const int blockSize = qt_hash_block_size(method);-
138-
139 if (key.size() > blockSize) {
key.size() > blockSizeDescription
TRUEnever evaluated
FALSEevaluated 18 times by 1 test
Evaluated by:
  • tst_QMessageAuthenticationCode
0-18
140 QCryptographicHash hash(method);-
141 hash.addData(key);-
142 key = hash.result();-
143 hash.reset();-
144 }
never executed: end of block
0
145-
146 if (key.size() < blockSize) {
key.size() < blockSizeDescription
TRUEevaluated 18 times by 1 test
Evaluated by:
  • tst_QMessageAuthenticationCode
FALSEnever evaluated
0-18
147 const int size = key.size();-
148 key.resize(blockSize);-
149 memset(key.data() + size, 0, blockSize - size);-
150 }
executed 18 times by 1 test: end of block
Executed by:
  • tst_QMessageAuthenticationCode
18
151-
152 QVarLengthArray<char> iKeyPad(blockSize);-
153 const char * const keyData = key.constData();-
154-
155 for (int i = 0; i < blockSize; ++i)
i < blockSizeDescription
TRUEevaluated 1152 times by 1 test
Evaluated by:
  • tst_QMessageAuthenticationCode
FALSEevaluated 18 times by 1 test
Evaluated by:
  • tst_QMessageAuthenticationCode
18-1152
156 iKeyPad[i] = keyData[i] ^ 0x36;
executed 1152 times by 1 test: iKeyPad[i] = keyData[i] ^ 0x36;
Executed by:
  • tst_QMessageAuthenticationCode
1152
157-
158 messageHash.addData(iKeyPad.data(), iKeyPad.size());-
159}
executed 18 times by 1 test: end of block
Executed by:
  • tst_QMessageAuthenticationCode
18
160-
161/*!-
162 \class QMessageAuthenticationCode-
163 \inmodule QtCore-
164-
165 \brief The QMessageAuthenticationCode class provides a way to generate-
166 hash-based message authentication codes.-
167-
168 \since 5.1-
169-
170 \ingroup tools-
171 \reentrant-
172-
173 QMessageAuthenticationCode supports all cryptographic hashes which are supported by-
174 QCryptographicHash.-
175-
176 To generate message authentication code, pass hash algorithm QCryptographicHash::Algorithm-
177 to constructor, then set key and message by setKey() and addData() functions. Result-
178 can be acquired by result() function.-
179 \snippet qmessageauthenticationcode/main.cpp 0-
180 \dots-
181 \snippet qmessageauthenticationcode/main.cpp 1-
182-
183 Alternatively, this effect can be achieved by providing message,-
184 key and method to hash() method.-
185 \snippet qmessageauthenticationcode/main.cpp 2-
186-
187 \sa QCryptographicHash-
188*/-
189-
190/*!-
191 Constructs an object that can be used to create a cryptographic hash from data-
192 using method \a method and key \a key.-
193*/-
194QMessageAuthenticationCode::QMessageAuthenticationCode(QCryptographicHash::Algorithm method,-
195 const QByteArray &key)-
196 : d(new QMessageAuthenticationCodePrivate(method))-
197{-
198 d->key = key;-
199}
executed 18 times by 1 test: end of block
Executed by:
  • tst_QMessageAuthenticationCode
18
200-
201/*!-
202 Destroys the object.-
203*/-
204QMessageAuthenticationCode::~QMessageAuthenticationCode()-
205{-
206 delete d;-
207}
executed 18 times by 1 test: end of block
Executed by:
  • tst_QMessageAuthenticationCode
18
208-
209/*!-
210 Resets message data. Calling this method doesn't affect the key.-
211*/-
212void QMessageAuthenticationCode::reset()-
213{-
214 d->result.clear();-
215 d->messageHash.reset();-
216 d->messageHashInited = false;-
217}
executed 18 times by 1 test: end of block
Executed by:
  • tst_QMessageAuthenticationCode
18
218-
219/*!-
220 Sets secret \a key. Calling this method automatically resets the object state.-
221*/-
222void QMessageAuthenticationCode::setKey(const QByteArray &key)-
223{-
224 reset();-
225 d->key = key;-
226}
executed 18 times by 1 test: end of block
Executed by:
  • tst_QMessageAuthenticationCode
18
227-
228/*!-
229 Adds the first \a length chars of \a data to the message.-
230*/-
231void QMessageAuthenticationCode::addData(const char *data, int length)-
232{-
233 d->initMessageHash();-
234 d->messageHash.addData(data, length);-
235}
never executed: end of block
0
236-
237/*!-
238 \overload addData()-
239*/-
240void QMessageAuthenticationCode::addData(const QByteArray &data)-
241{-
242 d->initMessageHash();-
243 d->messageHash.addData(data);-
244}
executed 27 times by 1 test: end of block
Executed by:
  • tst_QMessageAuthenticationCode
27
245-
246/*!-
247 Reads the data from the open QIODevice \a device until it ends-
248 and adds it to message. Returns \c true if reading was successful.-
249-
250 \note \a device must be already opened.-
251 */-
252bool QMessageAuthenticationCode::addData(QIODevice *device)-
253{-
254 d->initMessageHash();-
255 return d->messageHash.addData(device);
never executed: return d->messageHash.addData(device);
0
256}-
257-
258/*!-
259 Returns the final authentication code.-
260-
261 \sa QByteArray::toHex()-
262*/-
263QByteArray QMessageAuthenticationCode::result() const-
264{-
265 if (!d->result.isEmpty())
!d->result.isEmpty()Description
TRUEnever evaluated
FALSEevaluated 18 times by 1 test
Evaluated by:
  • tst_QMessageAuthenticationCode
0-18
266 return d->result;
never executed: return d->result;
0
267-
268 d->initMessageHash();-
269-
270 const int blockSize = qt_hash_block_size(d->method);-
271-
272 QByteArray hashedMessage = d->messageHash.result();-
273-
274 QVarLengthArray<char> oKeyPad(blockSize);-
275 const char * const keyData = d->key.constData();-
276-
277 for (int i = 0; i < blockSize; ++i)
i < blockSizeDescription
TRUEevaluated 1152 times by 1 test
Evaluated by:
  • tst_QMessageAuthenticationCode
FALSEevaluated 18 times by 1 test
Evaluated by:
  • tst_QMessageAuthenticationCode
18-1152
278 oKeyPad[i] = keyData[i] ^ 0x5c;
executed 1152 times by 1 test: oKeyPad[i] = keyData[i] ^ 0x5c;
Executed by:
  • tst_QMessageAuthenticationCode
1152
279-
280 QCryptographicHash hash(d->method);-
281 hash.addData(oKeyPad.data(), oKeyPad.size());-
282 hash.addData(hashedMessage);-
283-
284 d->result = hash.result();-
285 return d->result;
executed 18 times by 1 test: return d->result;
Executed by:
  • tst_QMessageAuthenticationCode
18
286}-
287-
288/*!-
289 Returns the authentication code for the message \a message using-
290 the key \a key and the method \a method.-
291*/-
292QByteArray QMessageAuthenticationCode::hash(const QByteArray &message, const QByteArray &key,-
293 QCryptographicHash::Algorithm method)-
294{-
295 QMessageAuthenticationCode mac(method);-
296 mac.setKey(key);-
297 mac.addData(message);-
298 return mac.result();
never executed: return mac.result();
0
299}-
300-
301QT_END_NAMESPACE-
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