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// SSDEEP
// $Id: filedata.cpp 163 2012-07-17 19:59:54Z jessekornblum $
// Copyright (C) 2012 Kyrus. See COPYING for details.
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "filedata.h"
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
bool Filedata::valid(void) const
{
// A valid fuzzy hash has the form
// [blocksize]:[sig1]:[sig2]
// with no filename at the end
// First find the block size
const char * sig = m_signature.c_str();
unsigned int block_size;
if (-1 == sscanf(sig, "%u:", &block_size))
return false;
// Move past the blocksize
sig = strchr(sig,':');
if (!sig)
return false;
// Move past the first colon and Look for the second colon
++sig;
sig = strchr(sig,':');
if (!sig)
return false;
// Finally, a valid signature does *not* have a filename at the end of it
sig = strchr(sig,',');
if (sig)
return false;
return true;
}
void Filedata::clear_cluster(void)
{
if (NULL == m_cluster)
return;
// We don't want to call the destructors on the individual elements
// so we have to clear the set first.
m_cluster->clear();
m_cluster = NULL;
}
Filedata::Filedata(const TCHAR *fn, const char * sig, const char * match_file)
{
m_signature = std::string(sig);
if (not valid())
throw std::bad_alloc();
m_filename = _tcsdup(fn);
m_cluster = NULL;
if (NULL == match_file)
m_has_match_file = false;
else
{
m_has_match_file = true;
m_match_file = std::string(match_file);
}
}
Filedata::Filedata(const std::string sig, const char * match_file)
{
// Set the easy stuff first
m_cluster = NULL;
if (NULL == match_file)
m_has_match_file = false;
else
{
m_has_match_file = true;
m_match_file = std::string(match_file);
}
// If we don't have a filename included with the sig, that's ok,
// but we should find out now.
// If there is a filename, it should be immediately after the
// first comma and enclosed in quotation marks.
size_t start, stop;
start = sig.find_first_of(",\"");
if (std::string::npos == start)
{
// There is no filename. Ok. We still have a valid Filedata.
m_filename = _tcsdup(_TEXT("[NO FILENAME]"));
m_signature = std::string(sig);
// We still have to check the validity of the signature
if (not valid())
throw std::bad_alloc();
return;
}
// There is a filename. Ok.
// Advance past the comma and quotation mark.
start += 2;
// Look for the second quotation mark, which should be at the end
// of the string.
stop = sig.find_last_of('"');
if (stop != sig.size() - 1)
throw std::bad_alloc();
// Strip off the final quotation mark and record the filename
std::string tmp = sig.substr(start,(stop - start));
// Strip off the filename from the signature. Remember that "start"
// now points to two characters ahead of the comma
m_signature = sig.substr(0,start-2);
// Unescape any quotation marks in the filename
while (tmp.find(std::string("\\\"")) != std::string::npos)
tmp.replace(tmp.find(std::string("\\\"")),2,std::string("\""));
#ifndef _WIN32
m_filename = strdup(tmp.c_str());
#else
char * tmp2 = strdup(tmp.c_str());
// On Win32 we have to do a kludgy cast from ordinary char
// values to the TCHAR values we use internally. Because we may have
// reset the string length, get it again.
// The extra +1 is for the terminating newline
size_t i, sz = strlen(tmp2);
m_filename = (TCHAR *)malloc(sizeof(TCHAR) * (sz + 1));
if (NULL == m_filename)
throw std::bad_alloc();
for (i = 0 ; i < sz ; i++)
m_filename[i] = (TCHAR)(tmp2[i]);
m_filename[i] = 0;
#endif
}
std::ostream& operator<<(std::ostream& o, const Filedata& f)
{
return o << f.get_signature() << "," << f.get_filename() << ",";
}
bool operator==(const Filedata& a, const Filedata& b)
{
if (a.get_signature() != b.get_signature())
return false;
if (a.has_match_file() and not b.has_match_file())
return false;
if (not a.has_match_file() and b.has_match_file())
return false;
if (a.has_match_file() and b.has_match_file())
{
if (a.get_match_file() != b.get_match_file())
return false;
}
return true;
}