QCA

mactest.cpp
1 /*
2  Copyright (C) 2004, 2006 Brad Hards <[email protected]>
3 
4  Permission is hereby granted, free of charge, to any person obtaining a copy
5  of this software and associated documentation files (the "Software"), to deal
6  in the Software without restriction, including without limitation the rights
7  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8  copies of the Software, and to permit persons to whom the Software is
9  furnished to do so, subject to the following conditions:
10 
11  The above copyright notice and this permission notice shall be included in
12  all copies or substantial portions of the Software.
13 
14  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17  AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
18  AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
19  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20 */
21 
22 // QtCrypto has the declarations for all of QCA
23 #include <QtCrypto>
24 
25 #include <QCoreApplication>
26 #include <QDebug>
27 
28 // needed for printf
29 #include <cstdio>
30 
31 #ifdef QT_STATICPLUGIN
32 #include "import_plugins.h"
33 #endif
34 
35 int main(int argc, char **argv)
36 {
37  // the Initializer object sets things up, and
38  // also does cleanup when it goes out of scope
40 
41  QCoreApplication app(argc, argv);
42 
43  qDebug() << "This example shows hashed MAC";
44 
45  // we use the first argument as the data to authenticate
46  // if an argument is provided. Use "hello" if no argument
47  QByteArray arg = (argc >= 2) ? argv[1] : "hello";
48 
49  // we use the second argument as the key to authenticate
50  // with, if two arguments are provided. Use "secret" as
51  // the key if less than two arguments.
52  QCA::SecureArray key((argc >= 3) ? argv[2] : "secret");
53 
54  // must always check that an algorithm is supported before using it
55  if (!QCA::isSupported("hmac(sha1)")) {
56  printf("HMAC(SHA1) not supported!\n");
57  } else {
58  // create the required object using HMAC with SHA-1, and an
59  // empty key.
60  QCA::MessageAuthenticationCode hmacObject(QStringLiteral("hmac(sha1)"), QCA::SecureArray());
61 
62  // create the key
63  QCA::SymmetricKey keyObject(key);
64 
65  // set the HMAC object to use the key
66  hmacObject.setup(key);
67  // that could also have been done in the
68  // QCA::MessageAuthenticationCode constructor
69 
70  // we split it into two parts to show incremental update
71  QCA::SecureArray part1(arg.left(3)); // three chars - "hel"
72  QCA::SecureArray part2(arg.mid(3)); // the rest - "lo"
73  hmacObject.update(part1);
74  hmacObject.update(part2);
75 
76  // no more updates after calling final.
77  QCA::SecureArray resultArray = hmacObject.final();
78 
79  // convert the result into printable hexadecimal.
80  QString result = QCA::arrayToHex(resultArray.toByteArray());
81  printf("HMAC(SHA1) of \"%s\" with \"%s\" = [%s]\n", arg.data(), key.data(), result.toLatin1().data());
82  }
83 
84  return 0;
85 }
QByteArray toByteArray() const
Copy the contents of the secure array out to a standard QByteArray.
Container for keys for symmetric encryption algorithms.
Definition: qca_core.h:1263
General class for message authentication code (MAC) algorithms.
Definition: qca_basic.h:827
QCA_EXPORT bool isSupported(const char *features, const QString &provider=QString())
Test if a capability (algorithm) is available.
QByteArray mid(int pos, int len) const const
QCA_EXPORT QString arrayToHex(const QByteArray &array)
Convert a byte array to printable hexadecimal representation.
QCA_EXPORT void init()
Initialise QCA.
Secure array of bytes.
Definition: qca_tools.h:316
QByteArray left(int len) const const
QByteArray toLatin1() const const
char * data()
Convenience method for initialising and cleaning up QCA.
Definition: qca_core.h:659
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