mirror of
https://github.com/JonathanSalwan/ROPgadget
synced 2026-06-08 11:25:23 +00:00
Allan Wirth
97 lines
2.5 KiB
C
97 lines
2.5 KiB
C
/*
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** RopGadget - Release v3.4.2
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** Jonathan Salwan - http://twitter.com/JonathanSalwan
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** Allan Wirth - http://allanwirth.com/
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** http://shell-storm.org
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** 2012-11-11
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**
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** This program is free software; you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation; either version 2 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "ropgadget.h"
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/*
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** match() is used in search_instruction() for match any reg:
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** ex => %e?x match with %eax, %ebx, %ecx, %edx
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*/
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int match(const char *s1, const char *s2, size_t n)
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{
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size_t i;
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if (strlen(s1) < n)
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return 1;
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for (i = 0; s1[i] != '\0' && s2[i] != '\0' && i < n; i++)
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if ((unsigned char)s1[i] != (unsigned char)s2[i] && !(s2[i] == '?' || s2[i] == '#'))
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return 1;
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return 0;
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}
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/*
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** same as match but only check first n bytes
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*/
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int match2(const unsigned char *s1, const unsigned char *s2, size_t n)
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{
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size_t i;
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unsigned char c;
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for (i = 0; i < n; i++)
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{
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c = s2[i];
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if (c != '?' && c != '#' && c != s1[i])
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return 1;
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}
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return 0;
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}
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/* check if instruction was match and return addr */
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Address search_instruction(t_asm *pGadgets, char *instruction)
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{
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char *p;
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int i;
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for (i = 0; pGadgets[i].instruction != NULL; i++)
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for (p = pGadgets[i].instruction; *p != 0; p++)
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if (!match(p, instruction, strlen(instruction)) && pGadgets[i].flag == 1)
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return pGadgets[i].addr;
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return 0;
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}
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/* returns the gadget since addr */
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char *get_gadget_since_addr(t_asm *pGadgets, Address addr)
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{
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int i;
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for (i = 0; pGadgets[i].instruction != NULL; i++)
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if (pGadgets[i].addr == addr && pGadgets[i].flag == 1)
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return pGadgets[i].instruction;
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return "Error";
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}
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/* returns the gadget since addr with att syntax (just for parsing in makecode ) */
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char *get_gadget_since_addr_att(t_asm *pGadgets, Address addr)
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{
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int i;
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for (i = 0; pGadgets[i].instruction != NULL; i++)
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if (pGadgets[i].addr == addr && pGadgets[i].flag == 1)
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return pGadgets[i].instruction;
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return "Error";
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}
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