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Implemented --blacklist.

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yellows8 2016-06-25 11:02:53 -04:00
parent d62db6d7c5
commit ed9f1abe20
1 changed files with 61 additions and 26 deletions
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87
ropgadget_patternfinder.c
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@ -21,6 +21,9 @@ unsigned int dataload_offset = 0, dataload_enabled = 0;
unsigned int addval=0;
unsigned int printrawval = 0;
int blacklist_set = 0;
unsigned int blacklist_addrs[2] = {0};
int enable_script = 0;
char line_prefix[256];
@ -222,6 +225,12 @@ int parse_param(char *param, int type)
sscanf(&param[11], "0x%x", &dataload_offset);
}
if(strncmp(param, "--blacklist=", 12)==0)
{
blacklist_set = 1;
sscanf(&param[12], "0x%x-0x%x", &blacklist_addrs[0], &blacklist_addrs[1]);
}
if(strncmp(param, "--addval=", 9)==0)
{
sscanf(&param[9], "0x%x", &addval);
@ -282,6 +291,16 @@ int verify_params_state()
return ret;
}
unsigned int check_address_allowed(unsigned int address)
{
if(blacklist_set)
{
if(address >= blacklist_addrs[0] && address < blacklist_addrs[1])return 0;
}
return 1;
}
int locate_pattern()
{
int ret=0;
@ -366,35 +385,18 @@ int locate_pattern()
if(tmpval)
{
found2 = 0;
if(!dataload_enabled)
{
tmpval = ((unsigned int)pos) + baseaddr;
tmpval+= addval;
if(!plainout)printf("Found the pattern at(value added with 0x%x) ", addval);
if(!printrawval)
{
printf("%s0x%08x%s", line_prefix, tmpval, line_suffix);
}
else
{
printf("%s%02x%02x%02x%02x%s", line_prefix, (tmpval & 0xff), (tmpval>>8) & 0xff, (tmpval>>16) & 0xff, (tmpval>>24) & 0xff, line_suffix);
}
if(!plainout)printf(".");
}
else
{
tmpval = *((unsigned int*)&filebuf[((unsigned int)pos) + dataload_offset]);
tmpval+= addval;
found2 = check_address_allowed(tmpval);
if(!plainout)
{
printf("Found the pattern at ");
printf("%s0x%08x", line_prefix, ((unsigned int)pos) + baseaddr);
printf(", u32 value at +0x%x, value added with 0x%x: 0x%x.", dataload_offset, addval, tmpval);
}
else
if(found2)
{
if(!plainout)printf("Found the pattern at(value added with 0x%x) ", addval);
if(!printrawval)
{
printf("%s0x%08x%s", line_prefix, tmpval, line_suffix);
@ -403,12 +405,44 @@ int locate_pattern()
{
printf("%s%02x%02x%02x%02x%s", line_prefix, (tmpval & 0xff), (tmpval>>8) & 0xff, (tmpval>>16) & 0xff, (tmpval>>24) & 0xff, line_suffix);
}
if(!plainout)printf(".");
}
}
else
{
tmpval = *((unsigned int*)&filebuf[((unsigned int)pos) + dataload_offset]);
tmpval+= addval;
found2 = check_address_allowed(tmpval);
if(found2)
{
if(!plainout)
{
printf("Found the pattern at ");
printf("%s0x%08x", line_prefix, ((unsigned int)pos) + baseaddr);
printf(", u32 value at +0x%x, value added with 0x%x: 0x%x.", dataload_offset, addval, tmpval);
}
else
{
if(!printrawval)
{
printf("%s0x%08x%s", line_prefix, tmpval, line_suffix);
}
else
{
printf("%s%02x%02x%02x%02x%s", line_prefix, (tmpval & 0xff), (tmpval>>8) & 0xff, (tmpval>>16) & 0xff, (tmpval>>24) & 0xff, line_suffix);
}
}
}
}
printf("\n");
found++;
if(found==findtarget)break;
if(found2)
{
printf("\n");
found++;
if(found==findtarget)break;
}
}
}
@ -560,12 +594,13 @@ int main(int argc, char **argv)
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");
printf("--baseaddr=0x<hexval> This is the value which is added to the located offset when printing it, by default this is 0x0.\n");
printf("--dataload=0x<hexval> When used, the u32 at the specified offset relative to the located pattern location, is returned instead of the pattern offset. --baseaddr does not apply to the loaded value.\n");
printf("--blacklist=0x<hexval-start>-0x<hexval-end> When used, any final located output addresses under the specified blacklisted range are ignored.\n");
printf("--addval=0x<hexval> Add the specified value to the value which gets printed.\n");
printf("--plainout[=<prefix text>] Only print the located offset/address, unless an error occurs. If '=<text>' is specified, print that before printing the located offset/address.\n");
printf("--plainsuffix=[suffix text] When --plainout was used, print the specified text immediately after printing the located offset/address.\n");
printf("--printrawval Instead of printing 0x<val> for the final value, print the raw bytes in little-endian form.\n");
printf("--disablelocatehalt When the pattern wasn't found, don't return an error + immediately exit.\n");
printf("--script=<path> Specifies a script from which to load params from(identical to the cmd-line params), each line is for a different pattern to search for. Each param applies to the current line, and all the lines after that until that param gets specified on another line again. When '=<path>' isn't specified, the script is read from stdin. When this --script option is used, all input-param state is reset to the defaults, except for --patterntype, --baseaddr, --findtarget, and --plainsuffix. When beginning processing each line, the --patterndatamask, --dataload, --addval, --printrawval, and --plainout state is reset to the default before parsing the params each time. When a line is empty, a newline will be printed then processing will skip to the next line. When the first char of a line is '#'(comment), processing will just skip to the next line.\n");
printf("--script=<path> Specifies a script from which to load params from(identical to the cmd-line params), each line is for a different pattern to search for. Each param applies to the current line, and all the lines after that until that param gets specified on another line again. When '=<path>' isn't specified, the script is read from stdin. When this --script option is used, all input-param state is reset to the defaults, except for --patterntype, --baseaddr, --findtarget, --plainsuffix, and --blacklist. When beginning processing each line, the --patterndatamask, --dataload, --addval, --printrawval, and --plainout state is reset to the default before parsing the params each time. When a line is empty, a newline will be printed then processing will skip to the next line. When the first char of a line is '#'(comment), processing will just skip to the next line.\n");
return 0;
}