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| //
// Creator: http://www.dicelocksecurity.com
// Version: vers.3.0.0.1
//
// Copyright © 2008-2010 DiceLock Security, LLC. All rights reserved.
//
// DISCLAIMER
//
// THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
//
// DICELOCK IS A REGISTERED TRADEMARK OR TRADEMARK OF THE OWNERS
//
#include <stdexcept>
#include <stdlib.h>
#include <math.h>
#include "frequencyTest.h"
using namespace std;
namespace DiceLockSecurity {
namespace RandomTest {
// Random Test Class enumerator name
const RandomTests FrequencyTest::test = Frequency;
// Random Test Class minimum stream length
const unsigned int FrequencyTest::minimumLength = 100;
// Constructor, default
FrequencyTest::FrequencyTest() {
sum = 0;
sumDiv_n = 0.0;
}
// Constructor with a MathematicalFunctions object instantiated
FrequencyTest::FrequencyTest(MathematicalFunctions* mathFuncObj) {
sum = 0;
sumDiv_n = 0.0;
}
// Destructor
FrequencyTest::~FrequencyTest() {
sum = 0;
sumDiv_n = 0.0;
}
// Tests randomness of the BaseCryptoRandomStream and returns the random value
bool FrequencyTest::IsRandom(BaseCryptoRandomStream* bitStream) {
unsigned long i;
double f, s_obs, sum;
double sqrt2 = 1.41421356237309504880;
if (bitStream->GetBitLength() < this->GetMinimumLength()) {
this->error = InsufficientNumberOfBits;
this->random = false;
return this->random;
}
bitStream->SetBitPosition(0);
this->error = NoError;
sum = 0.0;
for(i = 0; i < bitStream->GetBitLength(); i++)
sum += 2*((int)bitStream->GetBitForward())-1;
s_obs = fabs(sum)/sqrt((double)bitStream->GetBitLength());
f = s_obs/sqrt2;
this->pValue = this->mathFuncs->ErFc(f);
if (this->pValue < this->GetAlpha()) {
this->random = false;
}
else {
this->random = true;
}
this->sum = (int)sum;
this->sumDiv_n = sum/bitStream->GetBitLength();
return this->random;
}
// Initializes the object
void FrequencyTest::Initialize(void) {
BaseRandomTest::Initialize();
sum = 0;
sumDiv_n = 0.0;
}
// Gets the type of the object
RandomTests FrequencyTest::GetType(void) {
return this->test;
}
// Gets the minimum random stream length
unsigned int FrequencyTest::GetMinimumLength(void) {
return this->minimumLength;
}
// Gets the "sum" result
int FrequencyTest::GetSum(void) {
return this->sum;
}
// Gets the "sumDiv_n" result
double FrequencyTest::GetSumDiv_n(void) {
return this->sumDiv_n;
}
}
}
|
DiceChecker 3.0.0.1 
