00001 /* 00002 Copyright (C) 2004, 2006 Brad Hards <bradh@frogmouth.net> 00003 00004 Permission is hereby granted, free of charge, to any person obtaining a copy 00005 of this software and associated documentation files (the "Software"), to deal 00006 in the Software without restriction, including without limitation the rights 00007 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 00008 copies of the Software, and to permit persons to whom the Software is 00009 furnished to do so, subject to the following conditions: 00010 00011 The above copyright notice and this permission notice shall be included in 00012 all copies or substantial portions of the Software. 00013 00014 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 00015 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 00016 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 00017 AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 00018 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 00019 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 00020 */ 00021 00022 // QtCrypto has the declarations for all of QCA 00023 #include <QtCrypto> 00024 00025 #include <QCoreApplication> 00026 #include <QDebug> 00027 00028 #include <iostream> 00029 00030 int main(int argc, char **argv) 00031 { 00032 QCoreApplication app(argc, argv); 00033 00034 qDebug() << "This example generates random numbers"; 00035 00036 // the Initializer object sets things up, and 00037 // also does cleanup when it goes out of scope 00038 QCA::Initializer init; 00039 00040 int randInt; 00041 // This is the standard way to generate a random integer. 00042 randInt = QCA::Random::randomInt(); 00043 qDebug() << "A random number: " << randInt; 00044 00045 // If you wanted a random character (octet), you could 00046 // use something like: 00047 unsigned char randChar; 00048 randChar = QCA::Random::randomChar(); 00049 // It might not be printable, so this may not produce output 00050 std::cout << "A random character: " << randChar << std::endl; 00051 00052 QCA::SecureArray tenBytes(10); 00053 // If you need more random values, you may want to 00054 // get an array, as shown below. 00055 tenBytes = QCA::Random::randomArray(10); 00056 00057 // To make this viewable, we convert to hexadecimal. 00058 std::cout << "A random 10 byte array (in hex): "; 00059 std::cout << QCA::Hex().arrayToString(tenBytes).toAscii().data() << std::endl; 00060 00061 // Under some circumstances, you may want to create a 00062 // Random object, rather than a static public member function. 00063 // This isn't normally the easiest way, but it does work 00064 QCA::Random myRandomObject; 00065 randChar = myRandomObject.nextByte(); 00066 tenBytes = myRandomObject.nextBytes(10); 00067 return 0; 00068 } 00069