The-Homebrew-Cloud/ropgadget_patternfinder
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Implemented --script, and moved some code-blocks into dedicated functions / minor other changes.

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yellows8 2015-06-09 15:47:34 -04:00
parent 89c19409d4
commit 64b0af9a13
1 changed files with 300 additions and 88 deletions
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380
ropgadget_patternfinder.c
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@ -16,7 +16,43 @@ unsigned char *filebuf = NULL, *patterndata = NULL, *patternmask = NULL;
size_t filebufsz=0, hashblocksize=0;
size_t patterndata_size=0, patternmask_size=0;
int enable_script = 0;
char line_prefix[256];
char script_path[1024];
void hexdump(void *ptr, int buflen)//From ctrtool.
{
unsigned char *buf = (unsigned char*)ptr;
int i, j;
for (i=0; i<buflen; i+=16)
{
printf("%06x: ", i);
for (j=0; j<16; j++)
{
if (i+j < buflen)
{
printf("%02x ", buf[i+j]);
}
else
{
printf(" ");
}
}
printf(" ");
for (j=0; j<16; j++)
{
if (i+j < buflen)
{
printf("%c", (buf[i+j] >= 0x20 && buf[i+j] <= 0x7e) ? buf[i+j] : '.');
}
}
printf("\n");
}
}
int load_bindata(char *arg, unsigned char **buf, unsigned int *size)
{
@ -105,9 +141,127 @@ int load_bindata(char *arg, unsigned char **buf, unsigned int *size)
return 0;
}
int parse_param(char *param, int type)
{
int ret=0;
unsigned int tmpsize=0;
if(strncmp(param, "--patterntype=", 14)==0)
{
if(strncmp(&param[14], "sha256", 6)==0)
{
patterntype = 0;
}
else if(strncmp(&param[14], "datacmp", 7)==0)
{
patterntype = 1;
}
else
{
printf("Invalid pattern-type.\n");
ret = 5;
}
}
if(strncmp(param, "--patterndata=", 14)==0)
{
if(patterndata)
{
free(patterndata);
patterndata = NULL;
}
tmpsize = 0;
ret = load_bindata(&param[14], &patterndata, &tmpsize);
patterndata_size = tmpsize;
}
if(strncmp(param, "--patterndatamask=", 18)==0)
{
if(patterndata)
{
free(patternmask);
patternmask = NULL;
}
tmpsize = 0;
ret = load_bindata(&param[18], &patternmask, &tmpsize);
patternmask_size = tmpsize;
}
if(strncmp(param, "--patternsha256size=", 20)==0)
{
sscanf(&param[20], "0x%x", &tmpsize);
hashblocksize = tmpsize;
}
if(strncmp(param, "--stride=", 9)==0)
{
sscanf(&param[9], "0x%x", &stride);
}
if(strncmp(param, "--findtarget=", 13)==0)
{
sscanf(&param[13], "0x%x", &findtarget);
}
if(strncmp(param, "--baseaddr=", 11)==0)
{
sscanf(&param[11], "0x%x", &baseaddr);
}
if(strncmp(param, "--plainout", 10)==0)
{
plainout = 1;
if(param[10] == '=')
{
strncpy(line_prefix, &param[11], sizeof(line_prefix)-1);
}
}
if(type==0 && strncmp(param, "--script", 8)==0)
{
enable_script = 1;
if(param[8] == '=')
{
strncpy(script_path, &param[9], sizeof(script_path)-1);
}
}
return ret;
}
int verify_params_state()
{
int ret = 0;
if(patterntype==-1)
{
printf("No pattern-type specified.\n");
ret = 5;
}
if(patterntype==0)
{
if(patterndata_size==0)
{
printf("--patternsha256size must be used when pattern-type is sha256.\n");
ret = 5;
}
if(patterndata_size != 0x20)
{
printf("Input hash size is invalid.\n");
ret = 5;
}
}
return ret;
}
int locate_pattern()
{
int ret;
int ret=0;
size_t pos, i;
unsigned int found, found2;
unsigned int tmpval, tmpval2;
@ -132,8 +286,6 @@ int locate_pattern()
{
if(filebufsz - pos < patterndata_size)break;
if(patternmask==NULL)
{
if(memcmp(patterndata, &filebuf[pos], patterndata_size)==0)
@ -185,13 +337,107 @@ int locate_pattern()
return ret;
}
int parse_script(FILE *fscript)
{
int pos, pos2;
int ret=0;
int linenum = 0;
char *strptr, *strptr2;
char linebuf[1024];
char tmpbuf[1024];
memset(linebuf, 0, sizeof(linebuf));
while(fgets(linebuf, 1023, fscript))
{
linenum++;
strptr = strchr(linebuf, '\n');
if(strptr)*strptr = 0;
if(strlen(linebuf)==0)continue;
strptr = linebuf;
if(patternmask_size)
{
free(patternmask);
patternmask = NULL;
patternmask_size=0;
}
while(*strptr)
{
if(strptr[0] == ' ')
{
strptr++;
continue;
}
if(strptr[0] == '"' || strptr[0] == '\'')
{
strptr++;
memset(tmpbuf, 0, sizeof(tmpbuf));
for(pos=0; pos<sizeof(tmpbuf)-1; pos++)
{
if(strptr[pos]==0 || strptr[pos] == '\'' || strptr[pos] == '"')break;
tmpbuf[pos] = strptr[pos];
}
if(strptr[pos] == '\'' || strptr[pos] == '"')strptr++;
strptr+= pos;
}
else
{
memset(tmpbuf, 0, sizeof(tmpbuf));
for(pos=0; pos<sizeof(tmpbuf)-1; pos++)
{
if(strptr[pos]==0 || strptr[pos] == ' ')break;
tmpbuf[pos] = strptr[pos];
}
if(strptr[pos] == ' ')strptr++;
strptr+= pos;
}
ret = parse_param(tmpbuf, 1);
if(ret!=0)
{
printf("Line#: %d\n", linenum);
return ret;
}
}
ret = verify_params_state();
if(ret!=0)
{
printf("Line#: %d\n", linenum);
return ret;
}
ret = locate_pattern();
if(ret!=0)
{
printf("Line#: %d\n", linenum);
return ret;
}
}
return ret;
}
int main(int argc, char **argv)
{
int argi;
int ret;
unsigned int tmpsize=0;
struct stat filestat;
FILE *fbin;
FILE *fbin, *fscript;
if(argc<3)
{
@ -209,6 +455,7 @@ 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("--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("--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, and --findtarget. When beginning processing each line, the --patterndatamask is reset to the default before parsing the params each time.\n");
return 0;
}
@ -216,95 +463,20 @@ int main(int argc, char **argv)
ret = 0;
memset(line_prefix, 0, sizeof(line_prefix));
memset(script_path, 0, sizeof(script_path));
for(argi=2; argi<argc; argi++)
{
if(strncmp(argv[argi], "--patterntype=", 14)==0)
{
if(strncmp(&argv[argi][14], "sha256", 6)==0)
{
patterntype = 0;
}
else if(strncmp(&argv[argi][14], "datacmp", 7)==0)
{
patterntype = 1;
}
else
{
printf("Invalid pattern-type.\n");
ret = 5;
}
}
if(strncmp(argv[argi], "--patterndata=", 14)==0)
{
tmpsize = 0;
ret = load_bindata(&argv[argi][14], &patterndata, &tmpsize);
patterndata_size = tmpsize;
}
if(strncmp(argv[argi], "--patterndatamask=", 18)==0)
{
tmpsize = 0;
ret = load_bindata(&argv[argi][18], &patternmask, &tmpsize);
patternmask_size = tmpsize;
}
if(strncmp(argv[argi], "--patternsha256size=", 20)==0)
{
sscanf(&argv[argi][20], "0x%x", &tmpsize);
hashblocksize = tmpsize;
}
if(strncmp(argv[argi], "--stride=", 9)==0)
{
sscanf(&argv[argi][9], "0x%x", &stride);
}
if(strncmp(argv[argi], "--findtarget=", 13)==0)
{
sscanf(&argv[argi][13], "0x%x", &findtarget);
}
if(strncmp(argv[argi], "--baseaddr=", 11)==0)
{
sscanf(&argv[argi][11], "0x%x", &baseaddr);
}
if(strncmp(argv[argi], "--plainout", 10)==0)
{
plainout = 1;
if(argv[argi][10] == '=')
{
strncpy(line_prefix, &argv[argi][11], sizeof(line_prefix)-1);
}
}
ret = parse_param(argv[argi], 0);
if(ret!=0)break;
}
if(ret!=0)return ret;
if(patterntype==-1)
if(!enable_script)
{
printf("No pattern-type specified.\n");
ret = 5;
}
if(patterntype==0)
{
if(patterndata_size==0)
{
printf("--patternsha256size must be used when pattern-type is sha256.\n");
ret = 5;
}
if(patterndata_size != 0x20)
{
printf("Input hash size is invalid.\n");
ret = 5;
}
}
ret = verify_params_state();
if(ret!=0)
{
@ -312,6 +484,7 @@ int main(int argc, char **argv)
free(patternmask);
return ret;
}
}
if(stat(argv[1], &filestat)==-1)
{
@ -353,7 +526,46 @@ int main(int argc, char **argv)
fclose(fbin);
if(enable_script)
{
free(patterndata);
free(patternmask);
patterndata = NULL;
patternmask = NULL;
patterndata_size=0;
patternmask_size=0;
hashblocksize = 0;
stride = 4;
plainout = 0;
memset(line_prefix, 0, sizeof(line_prefix));
if(script_path[0])
{
fscript = fopen(script_path, "r");
if(fscript==NULL)
{
printf("Failed to open script.\n");
free(filebuf);
return 1;
}
}
else
{
fscript = stdin;
}
}
if(!enable_script)
{
ret = locate_pattern();
}
else
{
ret = parse_script(fscript);
if(script_path[0])fclose(fscript);
}
free(filebuf);
free(patterndata);