mirror of
https://github.com/radareorg/radare2.git
synced 2024-10-07 02:23:58 +00:00
571 lines
12 KiB
C
571 lines
12 KiB
C
/* radare - LGPL - Copyright 2011-2018 - pancake */
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#include <r_egg.h>
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#include <r_bin.h>
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#include <getopt.c>
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#include "../blob/version.c"
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#include <r_util/r_print.h>
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#include <r_util.h>
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static int usage(int v) {
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printf ("Usage: ragg2 [-FOLsrxhvz] [-a arch] [-b bits] [-k os] [-o file] [-I path]\n"
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" [-i sc] [-e enc] [-B hex] [-c k=v] [-C file] [-p pad] [-q off]\n"
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" [-dDw off:hex] file|f.asm|-\n");
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if (v) {
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printf (
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" -a [arch] select architecture (x86, mips, arm)\n"
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" -b [bits] register size (32, 64, ..)\n"
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" -B [hexpairs] append some hexpair bytes\n"
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" -c [k=v] set configuration options\n"
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" -C [file] append contents of file\n"
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" -d [off:dword] patch dword (4 bytes) at given offset\n"
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" -D [off:qword] patch qword (8 bytes) at given offset\n"
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" -e [encoder] use specific encoder. see -L\n"
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" -f [format] output format (raw, c, pe, elf, mach0, python, javascript)\n"
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" -F output native format (osx=mach0, linux=elf, ..)\n"
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" -h show this help\n"
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" -i [shellcode] include shellcode plugin, uses options. see -L\n"
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" -I [path] add include path\n"
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" -k [os] operating system's kernel (linux,bsd,osx,w32)\n"
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" -L list all plugins (shellcodes and encoders)\n"
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" -n [dword] append 32bit number (4 bytes)\n"
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" -N [dword] append 64bit number (8 bytes)\n"
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" -o [file] output file\n"
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" -O use default output file (filename without extension or a.out)\n"
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" -p [padding] add padding after compilation (padding=n10s32)\n"
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" ntas : begin nop, trap, 'a', sequence\n"
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" NTAS : same as above, but at the end\n"
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" -P [size] prepend debruijn pattern\n"
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" -q [fragment] debruijn pattern offset\n"
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" -r show raw bytes instead of hexpairs\n"
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" -s show assembler\n"
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" -v show version\n"
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" -w [off:hex] patch hexpairs at given offset\n"
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" -x execute\n"
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" -z output in C string syntax\n");
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}
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return 1;
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}
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static void list(REgg *egg) {
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RListIter *iter;
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REggPlugin *p;
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printf ("shellcodes:\n");
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r_list_foreach (egg->plugins, iter, p) {
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if (p->type == R_EGG_PLUGIN_SHELLCODE) {
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printf ("%10s : %s\n", p->name, p->desc);
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}
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}
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printf ("encoders:\n");
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r_list_foreach (egg->plugins, iter, p) {
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if (p->type == R_EGG_PLUGIN_ENCODER) {
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printf ("%10s : %s\n", p->name, p->desc);
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}
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}
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}
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static int create(const char *format, const char *arch, int bits, const ut8 *code, int codelen) {
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RBin *bin = r_bin_new ();
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RBinArchOptions opts;
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RBuffer *b;
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r_bin_arch_options_init (&opts, arch, bits);
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b = r_bin_create (bin, format, code, codelen, NULL, 0, &opts);
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if (b) {
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size_t blen = b->length;
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if (write (1, b->buf, blen) != blen) {
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eprintf ("Failed to write buffer\n");
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}
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r_buf_free (b);
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} else {
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eprintf ("Cannot create binary for this format '%s'.\n", format);
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}
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r_bin_free (bin);
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return 0;
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}
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static int openfile(const char *f, int x) {
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int fd = open (f, O_RDWR | O_CREAT, 0644);
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if (fd == -1) {
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fd = open (f, O_RDWR);
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if (fd == -1) {
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return -1;
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}
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}
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#if __UNIX__
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if (x) {
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fchmod (fd, 0755);
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}
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#endif
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#if _MSC_VER
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int r = _chsize (fd, 0);
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#else
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int r = ftruncate (fd, 0);
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#endif
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if (r != 0) {
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eprintf ("Could not resize\n");
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}
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close (1);
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dup2 (fd, 1);
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return fd;
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}
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#define ISEXEC (fmt!='r')
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int main(int argc, char **argv) {
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const char *file = NULL;
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const char *padding = NULL;
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const char *pattern = NULL;
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char *bytes = NULL;
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const char *contents = NULL;
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const char *arch = R_SYS_ARCH;
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const char *os = R_EGG_OS_NAME;
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char *format = "raw";
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int show_execute = 0;
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int show_hex = 1;
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int show_asm = 0;
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int show_raw = 0;
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int append = 0;
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int show_str = 0;
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ut64 get_offset = 0;
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char *shellcode = NULL;
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char *encoder = NULL;
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char *sequence = NULL;
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int bits = (R_SYS_BITS & R_SYS_BITS_64) ? 64 : 32;
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int fmt = 0;
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const char *ofile = NULL;
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int ofileauto = 0;
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RBuffer *b;
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int c, i;
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REgg *egg = r_egg_new ();
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while ((c = getopt (argc, argv, "n:N:he:a:b:f:o:sxrk:FOI:Li:c:p:P:B:C:vd:D:w:zq:")) != -1) {
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switch (c) {
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case 'a':
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arch = optarg;
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if (!strcmp (arch, "trace")) {
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show_asm = 1;
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show_hex = 0;
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}
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break;
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case 'e':
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encoder = optarg;
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break;
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case 'b':
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bits = atoi (optarg);
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break;
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case 'B':
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bytes = r_str_append (bytes, optarg);
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break;
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case 'C':
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contents = optarg;
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break;
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case 'w':
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{
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char *arg = strdup (optarg);
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char *p = strchr (arg, ':');
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if (p) {
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int len, off;
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ut8 *b;
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*p++ = 0;
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off = r_num_math (NULL, arg);
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b = malloc (strlen (optarg) + 1);
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len = r_hex_str2bin (p, b);
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if (len > 0) {
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r_egg_patch (egg, off, (const ut8*)b, len);
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} else {
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eprintf ("Invalid hexstr for -w\n");
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}
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free (b);
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} else {
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eprintf ("Missing colon in -w\n");
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}
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free (arg);
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}
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break;
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case 'n':
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{
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ut32 n = r_num_math (NULL, optarg);
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append = 1;
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r_egg_patch (egg, -1, (const ut8*)&n, 4);
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}
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break;
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case 'N':
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{
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ut64 n = r_num_math (NULL, optarg);
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r_egg_patch (egg, -1, (const ut8*)&n, 8);
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append = 1;
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}
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break;
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case 'd':
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{
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ut32 off, n;
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char *p = strchr (optarg, ':');
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if (p) {
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*p = 0;
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off = r_num_math (NULL, optarg);
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n = r_num_math (NULL, p + 1);
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*p = ':';
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// TODO: honor endianness here
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r_egg_patch (egg, off, (const ut8*)&n, 4);
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} else {
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eprintf ("Missing colon in -d\n");
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}
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}
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break;
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case 'D':
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{
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char *p = strchr (optarg, ':');
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if (p) {
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ut64 n, off = r_num_math (NULL, optarg);
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n = r_num_math (NULL, p + 1);
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// TODO: honor endianness here
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r_egg_patch (egg, off, (const ut8*)&n, 8);
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} else {
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eprintf ("Missing colon in -d\n");
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}
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}
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break;
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case 'o':
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ofile = optarg;
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break;
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case 'O':
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ofileauto = 1;
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break;
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case 'I':
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r_egg_lang_include_path (egg, optarg);
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break;
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case 'i':
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shellcode = optarg;
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break;
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case 'p':
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padding = optarg;
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break;
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case 'P':
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pattern = optarg;
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break;
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case 'c':
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{
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char *p = strchr (optarg, '=');
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if (p) {
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*p++ = 0;
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r_egg_option_set (egg, optarg, p);
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} else {
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r_egg_option_set (egg, optarg, "true");
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}
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}
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break;
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case 'F':
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#if __APPLE__
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format = "mach0";
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#elif __WINDOWS__
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format = "pe";
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#else
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format = "elf";
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#endif
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show_asm = 0;
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break;
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case 'f':
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format = optarg;
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show_asm = 0;
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break;
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case 's':
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show_asm = 1;
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show_hex = 0;
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break;
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case 'k':
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os = optarg;
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break;
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case 'r':
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show_raw = 1;
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break;
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case 'x':
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// execute
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show_execute = 1;
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break;
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case 'L':
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list (egg);
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r_egg_free (egg);
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free (sequence);
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return 0;
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case 'h':
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r_egg_free (egg);
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free (sequence);
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return usage (1);
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case 'v':
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free (sequence);
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r_egg_free (egg);
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return blob_version("ragg2");
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case 'z':
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show_str = 1;
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break;
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case 'q':
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get_offset = 1;
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sequence = strdup (optarg);
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break;
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default:
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free (sequence);
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r_egg_free (egg);
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return 1;
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}
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}
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if (optind == argc && !shellcode && !bytes && !contents && !encoder && !padding && !pattern && !append && !get_offset) {
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r_egg_free (egg);
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return usage (0);
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} else {
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file = argv[optind];
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}
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if (bits == 64) {
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if (!strcmp (format, "mach0")) {
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format = "mach064";
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} else if (!strcmp (format, "elf")) {
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format = "elf64";
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}
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}
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// catch this first
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if (get_offset) {
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if (strncmp (sequence, "0x", 2)) {
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eprintf ("Need hex value with `0x' prefix e.g. 0x41414142\n");
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free (sequence);
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r_egg_free (egg);
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return 1;
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}
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get_offset = r_num_math (0, sequence);
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printf ("Little endian: %d\n", r_debruijn_offset (get_offset, false));
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printf ("Big endian: %d\n", r_debruijn_offset (get_offset, true));
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free (sequence);
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r_egg_free (egg);
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return 0;
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}
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// initialize egg
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r_egg_setup (egg, arch, bits, 0, os);
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if (file) {
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if (!strcmp (file, "-")) {
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char buf[1024];
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for (;;) {
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if (!fgets (buf, sizeof (buf) - 1, stdin)) {
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break;
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}
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if (feof (stdin)) {
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break;
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}
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r_egg_load (egg, buf, 0);
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}
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} else if (strstr (file, ".c")) {
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char *fileSanitized = strdup (file);
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r_str_sanitize (fileSanitized);
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char *textFile = r_egg_Cfile_parser (fileSanitized, arch, os, bits);
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if (!textFile) {
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eprintf ("Failure while parsing '%s'\n", fileSanitized);
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goto fail;
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}
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int l;
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char *buf = r_file_slurp (textFile, &l);
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if (buf && l > 0) {
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r_egg_raw (egg, (const ut8*)buf, l);
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} else {
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eprintf ("Error loading '%s'\n", textFile);
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}
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r_file_rm (textFile);
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free (fileSanitized);
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free (textFile);
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free (buf);
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} else {
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if (strstr (file, ".s") || strstr (file, ".asm")) {
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fmt = 'a';
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} else {
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fmt = 0;
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}
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if (!r_egg_include (egg, file, fmt)) {
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eprintf ("Cannot open '%s'\n", file);
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goto fail;
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}
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}
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}
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// compile source code to assembly
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if (!r_egg_compile (egg)) {
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if (!fmt) {
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eprintf ("r_egg_compile: fail\n");
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r_egg_free (egg);
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return 1;
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}
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}
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// add raw file
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if (contents) {
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int l;
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char *buf = r_file_slurp (contents, &l);
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if (buf && l > 0) {
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r_egg_raw (egg, (const ut8*)buf, l);
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} else {
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eprintf ("Error loading '%s'\n", contents);
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}
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free (buf);
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}
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// add shellcode
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if (shellcode) {
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if (!r_egg_shellcode (egg, shellcode)) {
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eprintf ("Unknown shellcode '%s'\n", shellcode);
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r_egg_free (egg);
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return 1;
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}
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}
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// add raw bytes
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if (bytes) {
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ut8 *b = malloc (strlen (bytes) + 1);
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int len = r_hex_str2bin (bytes, b);
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if (len > 0) {
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if (!r_egg_raw (egg, b, len)) {
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eprintf ("Unknown '%s'\n", shellcode);
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r_egg_free (egg);
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return 1;
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}
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} else {
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eprintf ("Invalid hexpair string for -B\n");
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}
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free (b);
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free (bytes);
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bytes = NULL;
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}
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/* set output (create output file if needed) */
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if (ofileauto) {
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int fd;
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if (file) {
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char *o, *q, *p = strdup (file);
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if ( (o = strchr (p, '.')) ) {
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while ( (q = strchr (o + 1, '.')) ) {
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o = q;
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}
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*o = 0;
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fd = openfile (p, ISEXEC);
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} else {
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fd = openfile ("a.out", ISEXEC);
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}
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free (p);
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} else {
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fd = openfile ("a.out", ISEXEC);
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}
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if (fd == -1) {
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eprintf ("cannot open file '%s'\n", optarg);
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goto fail;
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}
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}
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if (ofile) {
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if (openfile (ofile, ISEXEC) == -1) {
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eprintf ("cannot open file '%s'\n", ofile);
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goto fail;
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}
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}
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// assemble to binary
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if (!r_egg_assemble (egg)) {
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eprintf ("r_egg_assemble: invalid assembly\n");
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goto fail;
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}
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if (encoder) {
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if (!r_egg_encode (egg, encoder)) {
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eprintf ("Invalid encoder '%s'\n", encoder);
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r_egg_free (egg);
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return 1;
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}
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}
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// add padding
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if (padding) {
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r_egg_padding (egg, padding);
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}
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// add pattern
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if (pattern) {
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r_egg_pattern (egg, r_num_math (NULL, pattern));
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}
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// apply patches
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if (!egg->bin) {
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egg->bin = r_buf_new ();
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}
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if (!(b = r_egg_get_bin (egg))) {
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eprintf ("r_egg_get_bin: invalid egg :(\n");
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goto fail;
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}
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r_egg_finalize (egg);
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if (show_asm) {
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printf ("%s\n", r_egg_get_assembly (egg));
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}
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if (show_raw || show_hex || show_execute) {
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if (show_execute) {
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int r = r_egg_run (egg);
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r_egg_free (egg);
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return r;
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}
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b = r_egg_get_bin (egg);
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if (show_raw) {
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size_t blen = b->length;
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if (write (1, b->buf, blen) != blen) {
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eprintf ("Failed to write buffer\n");
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goto fail;
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}
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} else {
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if (!format) {
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eprintf ("No format specified wtf\n");
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goto fail;
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}
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RPrint *p = r_print_new ();
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switch (*format) {
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case 'c':
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r_print_code (p, 0, b->buf, b->length, 'c');
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break;
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case 'j': // JavaScript
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r_print_code (p, 0, b->buf, b->length, 'j');
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break;
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case 'r':
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if (show_str) {
|
|
printf ("\"");
|
|
for (i = 0; i < b->length; i++) {
|
|
printf ("\\x%02x", b->buf[i]);
|
|
}
|
|
printf ("\"\n");
|
|
} else if (show_hex) {
|
|
for (i = 0; i < b->length; i++) {
|
|
printf ("%02x", b->buf[i]);
|
|
}
|
|
printf ("\n");
|
|
} // else show_raw is_above()
|
|
break;
|
|
case 'p': // PE
|
|
if (strlen(format) >= 2 && format[1] == 'y') { // Python
|
|
r_print_code (p, 0, b->buf, b->length, 'p');
|
|
}
|
|
break;
|
|
case 'e': // ELF
|
|
case 'm': // MACH0
|
|
create (format, arch, bits, b->buf, b->length);
|
|
break;
|
|
default:
|
|
eprintf ("unknown executable format (%s)\n", format);
|
|
goto fail;
|
|
}
|
|
r_print_free (p);
|
|
}
|
|
}
|
|
r_egg_free (egg);
|
|
return 0;
|
|
fail:
|
|
r_egg_free (egg);
|
|
return 1;
|
|
}
|