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#include <iostream>
#include <sstream>
#include <fstream>
#include <string>
#include <stdlib.h>
#include <sys/stat.h>
#include <vector>
#include <fcntl.h>
#include <openssl/ssl.h>
using namespace std;
// initializes the checksum system
int init_checksum(int pid)
{
ostringstream fst;
struct stat st;
fst << "/proc/";
fst << pid;
fst << "/maps";
if (stat(fst.str().c_str(), &st)==-1)
return 0;
return 1;
}
int checksum_file(string filename, MD5_CTX *md5)
{
int handle;
char buffer[1024];
if ((handle=open(filename.c_str(), O_RDONLY, 0))==-1)
return 0;
int len;
while (len=read(handle, buffer, 1024)>0)
{
MD5_Update(md5, buffer, len);
}
close(handle);
}
// computes a checksum based on /proc/pid/maps
// result needs to be allocated already. size 16 bytes
char *checksum(int pid, char *result)
{
ostringstream fst;
struct stat st;
fst << "/proc/";
fst << pid;
fst << "/maps";
ifstream input(fst.str().c_str());
string line;
vector<string> files;
while (getline(input, line))
{
if (line.length()>50)
files.push_back(line.substr(49));
}
sort(files.begin(), files.end());
MD5_CTX md5;
MD5_Init(&md5);
for (vector<string>::iterator it=files.begin(); it!=files.end();it++)
{
checksum_file(*it, &md5);
cout << *it << endl;
}
MD5_Final((unsigned char *)result, &md5);
return result;
}
int main()
{
char result[30];
memset(result, 0, 30);
checksum(424, result);
cout << result << endl;
}
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