GerbilSoft/hack-detection
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Show "COPY DETECTION" if both ROMs have identical content, ignoring padding.

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This commit is contained in:
David Korth 2017-07-08 00:17:05 -04:00
parent c77afa0c96
commit ec21fb96ed
1 changed files with 19 additions and 9 deletions
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28
hack-detection.c
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@ -110,10 +110,12 @@ static int is_a_tty(void)
/**
* Print the "HACK DETECTION" banner.
* @param is_copy 0 for "HACK"; 1 for "COPY".
*/
static void print_hack_detection(void)
static void print_hack_detection(int is_copy)
{
int lbside, rbside;
const TCHAR *const hc = (is_copy ? _T("COPY") : _T("HACK"));
#ifdef _WIN32
// Needed because MSVC prior to 2015 doesn't support C99.
HANDLE hStdOut;
@ -125,7 +127,7 @@ static void print_hack_detection(void)
// Is this a TTY?
if (!is_a_tty()) {
// Not a TTY. Print a generic banner.
_tprintf(_T("*** HACK DETECTION ***\n"));
_tprintf(_T("*** %s DETECTION ***\n"), hc);
return;
}
@ -138,7 +140,7 @@ static void print_hack_detection(void)
{
// Failed to get the console screen buffer info.
// Print a generic banner.
_tprintf(_T("*** HACK DETECTION ***\n"));
_tprintf(_T("*** %s DETECTION ***\n"), hc);
}
// Print "*** HACK DETECTION ***".
@ -151,7 +153,7 @@ static void print_hack_detection(void)
SetConsoleTextAttribute(hStdOut, BACKGROUND_GREEN | FOREGROUND_WHITE | FOREGROUND_INTENSITY);
_tprintf(_T("%*s%*s*** "), csbi.dwSize.X, _T(""), lbside, _T(""));
SetConsoleTextAttribute(hStdOut, BACKGROUND_GREEN | FOREGROUND_YELLOW | FOREGROUND_INTENSITY);
_tprintf(_T("HACK DETECTION"));
_tprintf(_T("%s DETECTION"), hc);
SetConsoleTextAttribute(hStdOut, BACKGROUND_GREEN | FOREGROUND_WHITE | FOREGROUND_INTENSITY);
// NOTE: If printing past the end of the console buffer, we have to
// subtract 1 from csbi.dwSize.X in order to not print an extra line
@ -179,7 +181,7 @@ static void print_hack_detection(void)
// Could not get the terminal size,
// or the terminal is too small.
// Fall back to the standard banner.
_tprintf(_T("*** HACK DETECTION ***\n"));
_tprintf(_T("*** %s DETECTION ***\n"), hc);
return;
}
@ -191,10 +193,10 @@ static void print_hack_detection(void)
rbside = lbside + (sz.ws_col % 2);
_tprintf(_T("\x1B[0m")
_T("\x1B[37;1m\x1B[42m%*s")
_T("%*s*** \x1B[33;1mHACK DETECTION\x1B[37;1m ***%*s")
_T("%*s*** \x1B[33;1m%s DETECTION\x1B[37;1m ***%*s")
_T("%*s")
_T("\x1B[0m\n")
, sz.ws_col, "", lbside, "", rbside, "", sz.ws_col, "");
, sz.ws_col, "", lbside, "", hc, rbside, "", sz.ws_col, "");
#endif
}
@ -234,6 +236,7 @@ int _tmain(int argc, TCHAR *argv[])
uint32_t sz_common; // Number of bytes the two ROMs have in common.
int pct; // Percentage, times 10.
int hack_detection; // Non-zero if a binary hack is detected.
int is_copy; // Non-zero if sz_check == sz_common.
// Temporary pointers within p_src/p_hack.
const uint8_t *pc_src, *pc_hack;
@ -394,9 +397,10 @@ int _tmain(int argc, TCHAR *argv[])
// If more than 50% of the bytes are common,
// this is probably a binary hack.
hack_detection = (sz_common >= (sz_check / 2));
is_copy = (sz_common == sz_check);
if (hack_detection) {
_tprintf(_T("\n"));
print_hack_detection();
print_hack_detection(is_copy);
_tprintf(_T("\n"));
} else {
_tprintf(_T("\n"));
@ -415,7 +419,13 @@ int _tmain(int argc, TCHAR *argv[])
_T("- Differing bytes: %u\n")
_T("- Matching percentage: %01d.%01d%%\n\n"),
sz_check, sz_common, sz_check-sz_common, pct/10, pct%10);
if (hack_detection) {
if (is_copy) {
if (sz_check == sz_src) {
_tprintf(_T("Both ROM images are identical.\n"));
} else {
_tprintf(_T("Both ROM images have identical content, ignoring padding.\n"));
}
} else if (hack_detection) {
_tprintf(_T("The hacked ROM is most likely a hex-edited binary hack.\n"));
} else {
_tprintf(_T("The hacked ROM is either a disassembly hack or not related\n")