qmessageauthenticationcode.cpp

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1/****************************************************************************-
2**-
3** Copyright (C) 2013 Ruslan Nigmatullin <euroelessar@yandex.ru>-
4** Contact: http://www.qt.io/licensing/-
5**-
6** This file is part of the QtCore module of the Qt Toolkit.-
7**-
8** $QT_BEGIN_LICENSE:LGPL21$-
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 http://www.qt.io/terms-conditions. For further-
15** information use the contact form at http://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 2.1 or version 3 as published by the Free-
20** Software Foundation and appearing in the file LICENSE.LGPLv21 and-
21** LICENSE.LGPLv3 included in the packaging of this file. Please review the-
22** following information to ensure the GNU Lesser General Public License-
23** requirements will be met: https://www.gnu.org/licenses/lgpl.html and-
24** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.-
25**-
26** As a special exception, The Qt Company gives you certain additional-
27** rights. These rights are described in The Qt Company LGPL Exception-
28** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.-
29**-
30** $QT_END_LICENSE$-
31**-
32****************************************************************************/-
33-
34#include "qmessageauthenticationcode.h"-
35#include "qvarlengtharray.h"-
36-
37/*-
38 These #defines replace the typedefs needed by the RFC6234 code. Normally-
39 the typedefs would come from from stdint.h, but since this header is not-
40 available on all platforms (MSVC 2008, for example), we #define them to the-
41 Qt equivalents.-
42*/-
43-
44#ifdef uint64_t-
45#undef uint64_t-
46#endif-
47-
48#define uint64_t QT_PREPEND_NAMESPACE(quint64)-
49-
50#ifdef uint32_t-
51#undef uint32_t-
52#endif-
53-
54#define uint32_t QT_PREPEND_NAMESPACE(quint32)-
55-
56#ifdef uint8_t-
57#undef uint8_t-
58#endif-
59-
60#define uint8_t QT_PREPEND_NAMESPACE(quint8)-
61-
62#ifdef int_least16_t-
63#undef int_least16_t-
64#endif-
65-
66#define int_least16_t QT_PREPEND_NAMESPACE(qint16)-
67-
68// Header from rfc6234 with 1 modification:-
69// sha1.h - commented out '#include <stdint.h>' on line 74-
70#include "../../3rdparty/rfc6234/sha.h"-
71-
72#undef uint64_t-
73#undef uint32_t-
74#undef uint68_t-
75#undef int_least16_t-
76-
77QT_BEGIN_NAMESPACE-
78-
79static int qt_hash_block_size(QCryptographicHash::Algorithm method)-
80{-
81 switch (method) {-
82 case QCryptographicHash::Md4:
never executed: case QCryptographicHash::Md4:
0
83 return 64;
never executed: return 64;
0
84 case QCryptographicHash::Md5:
executed 20 times by 1 test: case QCryptographicHash::Md5:
Executed by:
  • tst_QMessageAuthenticationCode
20
85 return 64;
executed 20 times by 1 test: return 64;
Executed by:
  • tst_QMessageAuthenticationCode
20
86 case QCryptographicHash::Sha1:
executed 8 times by 1 test: case QCryptographicHash::Sha1:
Executed by:
  • tst_QMessageAuthenticationCode
8
87 return SHA1_Message_Block_Size;
executed 8 times by 1 test: return SHA1_Message_Block_Size;
Executed by:
  • tst_QMessageAuthenticationCode
8
88 case QCryptographicHash::Sha224:
never executed: case QCryptographicHash::Sha224:
0
89 return SHA224_Message_Block_Size;
never executed: return SHA224_Message_Block_Size;
0
90 case QCryptographicHash::Sha256:
executed 8 times by 1 test: case QCryptographicHash::Sha256:
Executed by:
  • tst_QMessageAuthenticationCode
8
91 return SHA256_Message_Block_Size;
executed 8 times by 1 test: return SHA256_Message_Block_Size;
Executed by:
  • tst_QMessageAuthenticationCode
8
92 case QCryptographicHash::Sha384:
never executed: case QCryptographicHash::Sha384:
0
93 return SHA384_Message_Block_Size;
never executed: return SHA384_Message_Block_Size;
0
94 case QCryptographicHash::Sha512:
never executed: case QCryptographicHash::Sha512:
0
95 return SHA512_Message_Block_Size;
never executed: return SHA512_Message_Block_Size;
0
96 case QCryptographicHash::Sha3_224:
never executed: case QCryptographicHash::Sha3_224:
0
97 return 144;
never executed: return 144;
0
98 case QCryptographicHash::Sha3_256:
never executed: case QCryptographicHash::Sha3_256:
0
99 return 136;
never executed: return 136;
0
100 case QCryptographicHash::Sha3_384:
never executed: case QCryptographicHash::Sha3_384:
0
101 return 104;
never executed: return 104;
0
102 case QCryptographicHash::Sha3_512:
never executed: case QCryptographicHash::Sha3_512:
0
103 return 72;
never executed: return 72;
0
104 }-
105 return 0;
never executed: return 0;
0
106}-
107-
108class QMessageAuthenticationCodePrivate-
109{-
110public:-
111 QMessageAuthenticationCodePrivate(QCryptographicHash::Algorithm m)-
112 : messageHash(m), method(m), messageHashInited(false)-
113 {-
114 }
executed 18 times by 1 test: end of block
Executed by:
  • tst_QMessageAuthenticationCode
18
115-
116 QByteArray key;-
117 QByteArray result;-
118 QCryptographicHash messageHash;-
119 QCryptographicHash::Algorithm method;-
120 bool messageHashInited;-
121-
122 void initMessageHash();-
123};-
124-
125void QMessageAuthenticationCodePrivate::initMessageHash()-
126{-
127 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
128 return;
executed 27 times by 1 test: return;
Executed by:
  • tst_QMessageAuthenticationCode
27
129 messageHashInited = true;-
130-
131 const int blockSize = qt_hash_block_size(method);-
132-
133 if (key.size() > blockSize) {
key.size() > blockSizeDescription
TRUEnever evaluated
FALSEevaluated 18 times by 1 test
Evaluated by:
  • tst_QMessageAuthenticationCode
0-18
134 QCryptographicHash hash(method);-
135 hash.addData(key);-
136 key = hash.result();-
137 hash.reset();-
138 }
never executed: end of block
0
139-
140 if (key.size() < blockSize) {
key.size() < blockSizeDescription
TRUEevaluated 18 times by 1 test
Evaluated by:
  • tst_QMessageAuthenticationCode
FALSEnever evaluated
0-18
141 const int size = key.size();-
142 key.resize(blockSize);-
143 memset(key.data() + size, 0, blockSize - size);-
144 }
executed 18 times by 1 test: end of block
Executed by:
  • tst_QMessageAuthenticationCode
18
145-
146 QVarLengthArray<char> iKeyPad(blockSize);-
147 const char * const keyData = key.constData();-
148-
149 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
150 iKeyPad[i] = keyData[i] ^ 0x36;
executed 1152 times by 1 test: iKeyPad[i] = keyData[i] ^ 0x36;
Executed by:
  • tst_QMessageAuthenticationCode
1152
151-
152 messageHash.addData(iKeyPad.data(), iKeyPad.size());-
153}
executed 18 times by 1 test: end of block
Executed by:
  • tst_QMessageAuthenticationCode
18
154-
155/*!-
156 \class QMessageAuthenticationCode-
157 \inmodule QtCore-
158-
159 \brief The QMessageAuthenticationCode class provides a way to generate-
160 hash-based message authentication codes.-
161-
162 \since 5.1-
163-
164 \ingroup tools-
165 \reentrant-
166-
167 QMessageAuthenticationCode supports all cryptographic hashes which are supported by-
168 QCryptographicHash.-
169-
170 To generate message authentication code, pass hash algorithm QCryptographicHash::Algorithm-
171 to constructor, then set key and message by setKey() and addData() functions. Result-
172 can be acquired by result() function.-
173 \snippet qmessageauthenticationcode/main.cpp 0-
174 \dots-
175 \snippet qmessageauthenticationcode/main.cpp 1-
176-
177 Alternatively, this effect can be achieved by providing message,-
178 key and method to hash() method.-
179 \snippet qmessageauthenticationcode/main.cpp 2-
180-
181 \sa QCryptographicHash-
182*/-
183-
184/*!-
185 Constructs an object that can be used to create a cryptographic hash from data-
186 using method \a method and key \a key.-
187*/-
188QMessageAuthenticationCode::QMessageAuthenticationCode(QCryptographicHash::Algorithm method,-
189 const QByteArray &key)-
190 : d(new QMessageAuthenticationCodePrivate(method))-
191{-
192 d->key = key;-
193}
executed 18 times by 1 test: end of block
Executed by:
  • tst_QMessageAuthenticationCode
18
194-
195/*!-
196 Destroys the object.-
197*/-
198QMessageAuthenticationCode::~QMessageAuthenticationCode()-
199{-
200 delete d;-
201}
executed 18 times by 1 test: end of block
Executed by:
  • tst_QMessageAuthenticationCode
18
202-
203/*!-
204 Resets message data. Calling this method doesn't affect the key.-
205*/-
206void QMessageAuthenticationCode::reset()-
207{-
208 d->result.clear();-
209 d->messageHash.reset();-
210 d->messageHashInited = false;-
211}
executed 18 times by 1 test: end of block
Executed by:
  • tst_QMessageAuthenticationCode
18
212-
213/*!-
214 Sets secret \a key. Calling this method automatically resets the object state.-
215*/-
216void QMessageAuthenticationCode::setKey(const QByteArray &key)-
217{-
218 reset();-
219 d->key = key;-
220}
executed 18 times by 1 test: end of block
Executed by:
  • tst_QMessageAuthenticationCode
18
221-
222/*!-
223 Adds the first \a length chars of \a data to the message.-
224*/-
225void QMessageAuthenticationCode::addData(const char *data, int length)-
226{-
227 d->initMessageHash();-
228 d->messageHash.addData(data, length);-
229}
never executed: end of block
0
230-
231/*!-
232 \overload addData()-
233*/-
234void QMessageAuthenticationCode::addData(const QByteArray &data)-
235{-
236 d->initMessageHash();-
237 d->messageHash.addData(data);-
238}
executed 27 times by 1 test: end of block
Executed by:
  • tst_QMessageAuthenticationCode
27
239-
240/*!-
241 Reads the data from the open QIODevice \a device until it ends-
242 and adds it to message. Returns \c true if reading was successful.-
243-
244 \note \a device must be already opened.-
245 */-
246bool QMessageAuthenticationCode::addData(QIODevice *device)-
247{-
248 d->initMessageHash();-
249 return d->messageHash.addData(device);
never executed: return d->messageHash.addData(device);
0
250}-
251-
252/*!-
253 Returns the final authentication code.-
254-
255 \sa QByteArray::toHex()-
256*/-
257QByteArray QMessageAuthenticationCode::result() const-
258{-
259 if (!d->result.isEmpty())
!d->result.isEmpty()Description
TRUEnever evaluated
FALSEevaluated 18 times by 1 test
Evaluated by:
  • tst_QMessageAuthenticationCode
0-18
260 return d->result;
never executed: return d->result;
0
261-
262 d->initMessageHash();-
263-
264 const int blockSize = qt_hash_block_size(d->method);-
265-
266 QByteArray hashedMessage = d->messageHash.result();-
267-
268 QVarLengthArray<char> oKeyPad(blockSize);-
269 const char * const keyData = d->key.constData();-
270-
271 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
272 oKeyPad[i] = keyData[i] ^ 0x5c;
executed 1152 times by 1 test: oKeyPad[i] = keyData[i] ^ 0x5c;
Executed by:
  • tst_QMessageAuthenticationCode
1152
273-
274 QCryptographicHash hash(d->method);-
275 hash.addData(oKeyPad.data(), oKeyPad.size());-
276 hash.addData(hashedMessage);-
277-
278 d->result = hash.result();-
279 return d->result;
executed 18 times by 1 test: return d->result;
Executed by:
  • tst_QMessageAuthenticationCode
18
280}-
281-
282/*!-
283 Returns the authentication code for the message \a message using-
284 the key \a key and the method \a method.-
285*/-
286QByteArray QMessageAuthenticationCode::hash(const QByteArray &message, const QByteArray &key,-
287 QCryptographicHash::Algorithm method)-
288{-
289 QMessageAuthenticationCode mac(method);-
290 mac.setKey(key);-
291 mac.addData(message);-
292 return mac.result();
never executed: return mac.result();
0
293}-
294-
295QT_END_NAMESPACE-
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