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Implemented --findtarget.

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yellows8 2015-06-05 21:40:43 -04:00
parent 0af74215db
commit a7e5b44d6c
1 changed files with 11 additions and 4 deletions
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15
ropgadget_patternfinder.c
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@ -99,7 +99,7 @@ int main(int argc, char **argv)
int argi; int argi;
int ret; int ret;
int hashpattern_set = 0; int hashpattern_set = 0;
int found; unsigned int found, findtarget=1;
unsigned char *filebuf = NULL; unsigned char *filebuf = NULL;
unsigned char inhash[0x20]; unsigned char inhash[0x20];
unsigned char calchash[0x20]; unsigned char calchash[0x20];
@ -121,6 +121,7 @@ int main(int argc, char **argv)
printf("--patternsha256=<bindata> Hash every --patternsha256size bytes in the binary, for locating the target pattern. The input bindata(sha256 hash) size must be 0x20-bytes.\n"); printf("--patternsha256=<bindata> Hash every --patternsha256size bytes in the binary, for locating the target pattern. The input bindata(sha256 hash) size must be 0x20-bytes.\n");
printf("--patternsha256size=0x<hexval> See --patternsha256.\n"); printf("--patternsha256size=0x<hexval> See --patternsha256.\n");
printf("--stride=0x<hexval> In the search loop, this is the value that the pos is increased by at the end of each interation. By default this is 0x4.\n"); printf("--stride=0x<hexval> In the search loop, this is the value that the pos is increased by at the end of each interation. By default this is 0x4.\n");
printf("--findtarget=0x<hexval> Stop searching once this number of matches were found, by default this is 0x1. When this is 0x0, this will not stop until the end of the binary is reached.\n");
return 0; return 0;
} }
@ -156,6 +157,11 @@ int main(int argc, char **argv)
sscanf(&argv[argi][9], "0x%x", &stride); sscanf(&argv[argi][9], "0x%x", &stride);
} }
if(strncmp(argv[argi], "--findtarget=", 13)==0)
{
sscanf(&argv[argi][13], "0x%x", &findtarget);
}
if(ret!=0)break; if(ret!=0)break;
} }
@ -215,8 +221,9 @@ int main(int argc, char **argv)
SHA256(&filebuf[pos], hashblocksize, calchash); SHA256(&filebuf[pos], hashblocksize, calchash);
if(memcmp(inhash, calchash, 0x20)==0) if(memcmp(inhash, calchash, 0x20)==0)
{ {
found = 1; printf("Found the pattern at 0x%x.\n", (unsigned int)pos);
break; found++;
if(found==findtarget)break;
} }
} }
@ -227,7 +234,7 @@ int main(int argc, char **argv)
} }
else else
{ {
printf("Found the pattern at 0x%x.\n", (unsigned int)pos); printf("Found 0x%x matches.\n", found);
} }
free(filebuf); free(filebuf);