void hmac_MD5(char *fileName, int numOfIte)
{
//Code for HMAC_MD5
FILE *fin; // Names of the files used for HMAC_MD5
size_t hash_size = gcry_md_get_algo_dlen(GCRY_MD_MD5);
size_t fl_rd_v; //FIle Reading variable
double HMAC_MD5[100]; //Array stroing Time for each Encryption and Decryption
clock_t start_HMD5, end_HMD5; //Defining Clock Functions variables to track time
//gcrypt version check
void grcrypt_init(){
if (!gcry_check_version (GCRYPT_VERSION))
{
printf("LibGrycpt version doesn't match\n");
exit(-1);
}
}
int j,k; //To run loop
int bytes; //Scanning file BytebyByte
char *key;
char *buf_HMD5;
gcry_md_hd_t handle_MD5;
gcry_md_open(&handle_MD5,GCRY_MD_MD5,GCRY_MD_FLAG_HMAC|GCRY_MD_FLAG_SECURE);
for(j=0; j<numOfIte;j++){
//Getting the value of key
key = randomKey(32);
printf("HMAC MD5 key for Iteration No %d is : %s ",j+1, key);
//printf("The Key %s \n", key);
printf("\n\n");
gcry_md_setkey(handle_MD5, key, strlen(key));
fin = fopen(fileName, "rb");
fseek(fin,0,SEEK_END);
long int fileSize = ftell(fin);
//fseek(fin,0,SEEK_SET);
//printf("The file size is : %ld\n",fileSize);
buf_HMD5 = malloc(sizeof(char) *fileSize);
unsigned char *lenDig_HMD5 = NULL;
start_HMD5 = clock(); //Clock for HMAC_MD5 Starts
int bytes = fread(buf_HMD5, sizeof(char), fileSize-1, fin);
gcry_md_write(handle_MD5, buf_HMD5, fl_rd_v);;
gcry_md_final(handle_MD5);
lenDig_HMD5 = gcry_md_read(handle_MD5, GCRY_MD_MD5); //message digest length, "int algo = 0"
int i;
printf("The Hash Generated using HMAC MD5 is: \n");
for(i=0;i<strlen(lenDig_HMD5);i++)
{
printf("%x",lenDig_HMD5[i]);
}
printf("\n");
/*while(fl_rd_v = fread(buf_HMD5, 1, fileSize-1, fin))
{
gcry_md_write(handle_MD5, buf, fl_rd_v);
if()
}*/
end_HMD5 = clock();
//printf("End of Encrypption Iteration no %d using AES128 CBC Mode at: %ld \n ", j,end_EA128);
double total_HMD5 = (double)(end_HMD5-start_HMD5)/CLOCKS_PER_SEC*1000000000;
printf("\nTotal time taken for Hash Generation : %.2lf nano-seconds \n", total_HMD5);
printf("--------------------------------------------------------------------------------\n");
HMAC_MD5[j] = total_HMD5;
//}
}
gcry_md_close(handle_MD5);
free(buf_HMD5);
double Total_HMD5_Time=0.0;
for(k=0;k<numOfIte;k++)
{
Total_HMD5_Time = Total_HMD5_Time + HMAC_MD5[k];
}
printf("Total HASH Time (HMAC_MD5) for %d iterations is: %.2lf nano-seconds \n\n",k, Total_HMD5_Time);
double meanHMD5_time = Total_HMD5_Time/numOfIte;
printf("Mean Hash Time for (HMAC_MD5) %d iterations is: %.2lf nano-seconds \n\n",k, meanHMD5_time);
double medianHMD5 = calculateMedian(HMAC_MD5, numOfIte);
printf("The Median Hash Time for (HMAC_MD5) after %d Iterations is: %.2lf nano-seconds \n\n",numOfIte, medianHMD5);
}
void Comparator::generateParametericPlots(vector<string> *vecMetrics, int noOfMetrics, vector<string> vecmetricNames,string nameOfFile){
int noOfRegions;
ofstream tempFile;
vector<string> vecSeperatedMetrics;
stringstream queryString;
Gnuplot g1;
g1.reset_all();
g1.savetops(nameOfFile);
vector<string> vecParametersOfComparison;
vecParametersOfComparison.push_back("Mean");
vecParametersOfComparison.push_back("Median");
//vecParametersOfComparison.push_back("Variance");
vecParametersOfComparison.push_back("Standard deviation");
for(int i=1; i<noOfMetrics; i++){
double mean,median,/*variance,*/stdDeviation;
double *values;
int yrange=1;
//create temporary file to create the histogram data
queryString.str("");
queryString.clear();
queryString<<"histData"<<i;
tempFile.open(queryString.str().c_str());
tempFile.precision(5);
//for every method to be compared calculate the values
for(unsigned int methodCount=0; methodCount<vecMethodNames.size(); methodCount++){
noOfRegions = vecMetrics[methodCount].size();
values = new double[noOfRegions];
for(int j=0; j<noOfRegions;j++){
boost::split(vecSeperatedMetrics, vecMetrics[methodCount][j], boost::is_any_of(","));
values[j]= atof(vecSeperatedMetrics[i].c_str());
}
//Calculate Mean
mean = calculateMean(values,noOfRegions);
//Calculate Median
median = calculateMedian(values,noOfRegions);
//Calculate Variance
// variance = calculateVariance(values,noOfRegions);
//calculate Standard Deviation
stdDeviation = calculateStdDeviation(values,noOfRegions);
//find the yRange of the plot
int tempRange = (int)(mean+ median+ stdDeviation);
if(yrange < tempRange ) yrange = tempRange;
//create histogram file
tempFile<< vecMethodNames[methodCount] << " "<< fixed <<mean<< " " << fixed <<median<< " " << fixed << stdDeviation << endl;
}
tempFile.close();
//initialise the gnuplot object
g1.reset_plot();
g1.set_grid();
queryString.str("");
queryString.clear();
queryString << "[" << vecmetricNames[i]<<"] over all Regions";
g1.set_title(queryString.str());
g1.set_xlabel("Method Names");
queryString.str("");
queryString.clear();
queryString << "set yrange [0:" << yrange+1 << "]";
g1.cmd(queryString.str());
g1.cmd("set boxwidth 0.30 absolute");
g1.cmd("set style fill solid 1.00 border -1").cmd("set style histogram rowstacked gap 4");
g1.cmd("set style data histograms");
g1.set_legend("outside right top");
g1.cmd("set xtic rotate by -45 scale 0");
queryString.str("");
queryString.clear();
queryString<<"plot 'histData"<<i << "' using ";
unsigned int parameterCount=0;
queryString <<2 <<":xtic(1)t \"" << vecParametersOfComparison[parameterCount] <<"\"";
for(parameterCount =1; parameterCount<= vecParametersOfComparison.size()-1; parameterCount++){
queryString<<", '' using "<<(parameterCount+2)<< "t \"" << vecParametersOfComparison[parameterCount]<<"\"";
}
queryString<<endl;
//cout<< "\n\n" <<queryString.str()<<endl;
g1.cmd(queryString.str());
g1.reset_plot();
}
}