mirror of
https://github.com/JonathanSalwan/ROPgadget
synced 2026-06-08 11:25:23 +00:00
Jonathan Salwan
109 lines
2.7 KiB
C
109 lines
2.7 KiB
C
/*
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** RopGadget - Dev v3.3
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** Jonathan Salwan - http://twitter.com/JonathanSalwan
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** http://shell-storm.org
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** 2011-10-18
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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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int size_opcode(char *str)
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{
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int cpt = 0;
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while (*str != '\0')
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{
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if (*str == '\\')
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cpt++;
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str++;
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}
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if (cpt == 0)
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{
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fprintf(stderr, "Syntax: -opcode <opcode>\n\n");
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fprintf(stderr, "Ex: -opcode \"\\xcd\\x80\"\n");
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exit(EXIT_FAILURE);
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}
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return (cpt);
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}
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static void check_char(char c)
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{
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if (c >= '0' && c <= '9')
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return ;
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else if (c >= 'a' && c <= 'f')
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return ;
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else if (c >= 'A' && c <= 'F')
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return ;
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fprintf(stderr, "%sOpcode error%s: No hexa byte\n", RED, ENDC);;
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exit(EXIT_FAILURE);
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}
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static void make_opcode(char *str)
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{
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int i = 0;
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unsigned char *ptr;
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int size;
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size = size_opcode(str);
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opcode_mode.size = size;
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ptr = xmalloc(size * sizeof(char));
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memset(ptr, 0x00, size * sizeof(char));
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while (i != size)
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{
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if (*str != '\\' && *str != 'x')
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{
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fprintf(stderr, "%sSyntax error%s: Bad separator\n", RED, ENDC);
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fprintf(stderr, " Please respect this syntax: \\xcd\\x80\n");
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exit(EXIT_FAILURE);
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}
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while (*str == '\\' || *str == 'x')
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str++;
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check_char(*str);
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check_char(*(str + 1));
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ptr[i] = strtol(str, NULL, 16);
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i++;
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str += 2;
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}
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opcode_mode.opcode = ptr;
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}
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void check_opcode_mode(char **argv)
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{
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int i = 0;
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while (argv[i] != NULL)
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{
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if (!strcmp(argv[i], "-opcode"))
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{
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if (argv[i + 1] != NULL && argv[i + 1][0] != '\0')
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{
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opcode_mode.argument = argv[i + 1];
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opcode_mode.flag = 1;
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make_opcode(argv[i + 1]);
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}
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else
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{
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fprintf(stderr, "Syntax: -opcode <opcode>\n\n");
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fprintf(stderr, "Ex: -opcode \"\\xcd\\x80\"\n");
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exit(EXIT_FAILURE);
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}
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}
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i++;
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}
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}
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