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/* radare - LGPL - Copyright 2009-2013 - pancake */
#include <r_sign.h>
#include <r_anal.h>
R_LIB_VERSION (r_sign);
R_API RSign *r_sign_new() {
RSign *sig = R_NEW (RSign);
if (sig) {
sig->s_byte = sig->s_anal = 0;
sig->prefix[0] = '\0';
sig->printf = (PrintfCallback) printf;
sig->items = r_list_new ();
sig->items->free = r_sign_item_free;
}
return sig;
}
R_API void r_sign_prefix(RSign *sig, const char *str) {
if (str) {
strncpy (sig->prefix, str, sizeof (sig->prefix)-1);
sig->prefix[sizeof (sig->prefix)-1] = '\0';
} else sig->prefix[0] = '\0';
}
R_API int r_sign_add(RSign *sig, RAnal *anal, int type, const char *name, const char *arg) {
int len, ret = R_FALSE;
char *data, *ptr;
RSignItem *si; // TODO: like in r_search.. we need r_sign_item_new ()
// TODO: but..we need to use a pool here..
if (!name || !arg || !anal)
return R_FALSE;
if (!(si = R_NEW (RSignItem)))
return R_FALSE;
si->type = type;
snprintf (si->name, sizeof (si->name), "%s.%c.%s",
*sig->prefix?sig->prefix:"sign", type, name);
switch (type) {
case R_SIGN_FUNC: // function signature
// FUNC FORMAT [addr] [function-signature]
ptr = strchr (arg, ' ');
if (ptr) {
// TODO. matching must be done by sym/flag/function name
// sig->addr =
}
sig->s_func++;
r_list_append (sig->items, si);
break;
case R_SIGN_HEAD: // function prefix (push ebp..)
case R_SIGN_BYTE: // function mask
if (!(data = r_anal_strmask (anal, arg))) {
free (si);
break;
}
len = strlen (data)+1;
si->bytes = (ut8 *)malloc (len);
si->mask = (ut8 *)malloc (len);
if (si->bytes == NULL || si->mask == NULL) {
eprintf ("Cannot malloc\n");
free (si->mask);
free (si->bytes);
free (si);
break;
}
si->size = r_hex_str2binmask (data, si->bytes, si->mask);
if (si->size<1) {
free (si->bytes);
free (si->mask);
free (si);
} else {
r_list_append (sig->items, si);
if (type==R_SIGN_HEAD)
sig->s_head++;
else if (type==R_SIGN_BYTE)
sig->s_byte++;
}
free (data);
break;
default:
case R_SIGN_ANAL:
eprintf ("r_sign_add: TODO. unsupported signature type %d\n", type);
break;
}
return ret;
}
R_API void r_sign_list(RSign *sig, int rad) {
if (rad) {
int i;
RListIter *iter;
RSignItem *si;
if (!r_list_empty (sig->items))
sig->printf ("zp-\n");
r_list_foreach (sig->items, iter, si) {
sig->printf ("z%c %s ", si->type, si->name);
// TODO: show mask..
for (i=0; i<si->size; i++)
sig->printf ("%02x", si->bytes[i]);
sig->printf ("\n");
}
} else {
sig->printf ("Loaded %d signatures\n", sig->s_byte + sig->s_anal);
sig->printf (" %d byte signatures\n", sig->s_byte);
sig->printf (" %d head signatures\n", sig->s_head);
sig->printf (" %d func signatures\n", sig->s_func);
}
}
R_API void r_sign_reset(RSign *sig) {
r_list_free (sig->items);
sig->items = r_list_new ();
sig->s_anal = sig->s_byte = sig->s_head = sig->s_func = 0;
}
R_API RSign *r_sign_free(RSign *sig) {
if (!sig) return NULL;
r_list_free (sig->items);
free (sig);
return NULL;
}
R_API void r_sign_item_free(void *_item) {
RSignItem *item = _item;
free (item->bytes);
free (item->mask);
free (item);
}
R_API RSignItem *r_sign_check(RSign *sig, const ut8 *buf, int len) {
RListIter *iter;
RSignItem *si;
r_list_foreach (sig->items, iter, si) {
if (si->type == R_SIGN_BYTE) {
int l = (len>si->size)?si->size:len;
if (!r_mem_cmp_mask (buf, si->bytes, si->mask, l))
return si;
}
}
return NULL;
}
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