mirror of
https://github.com/radareorg/radare2.git
synced 2024-11-28 15:41:38 +00:00
439 lines
8.8 KiB
C
439 lines
8.8 KiB
C
/* radare - LGPL - Copyright 2007-2016 - pancake */
|
|
|
|
#include "r_types.h"
|
|
#include "r_util.h"
|
|
#include <stdio.h>
|
|
#include <ctype.h>
|
|
|
|
/* int c; ret = hex_to_byte(&c, 'c'); */
|
|
R_API int r_hex_to_byte(ut8 *val, ut8 c) {
|
|
if (IS_DIGIT(c)) {
|
|
*val = (ut8)(*val) * 16 + (c - '0');
|
|
} else if (c >= 'A' && c <= 'F') {
|
|
*val = (ut8)(*val) * 16 + (c - 'A' + 10);
|
|
} else if (c >= 'a' && c <= 'f') {
|
|
*val = (ut8)(*val) * 16 + (c - 'a' + 10);
|
|
} else {
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
R_API char *r_hex_from_py_str(char *out, const char *code) {
|
|
if (!strncmp (code, "'''", 3)) {
|
|
const char *s = code + 2;
|
|
return r_hex_from_c_str (out, &s);
|
|
} else {
|
|
return r_hex_from_c_str (out, &code);
|
|
}
|
|
return out;
|
|
}
|
|
|
|
static const char *skip_comment_py(const char *code) {
|
|
if (*code != '#') {
|
|
return code;
|
|
}
|
|
char *end = strchr (code, '\n');
|
|
if (end) {
|
|
code = end;
|
|
}
|
|
return code + 1;
|
|
}
|
|
|
|
R_API char *r_hex_from_py_array(char *out, const char *code) {
|
|
const char abc[] = "0123456789abcdef";
|
|
if (*code != '[' || !strchr (code, ']')) {
|
|
return NULL;
|
|
}
|
|
code++;
|
|
for (; *code; code++) {
|
|
char *comma = strchr (code, ',');
|
|
if (!comma) {
|
|
comma = strchr (code, ']');
|
|
}
|
|
if (!comma) {
|
|
break;
|
|
}
|
|
char * _word = r_str_ndup (code, comma - code);
|
|
const char *word = _word;
|
|
while (*word == ' ' || *word == '\t' || *word == '\n') {
|
|
word++;
|
|
word = skip_comment_py (word);
|
|
}
|
|
if (IS_DIGIT (*word)) {
|
|
ut8 n = (ut8)r_num_math (NULL, word);
|
|
*out++ = abc[(n >> 4) & 0xf];
|
|
*out++ = abc[n & 0xf];
|
|
}
|
|
free (_word);
|
|
code = comma;
|
|
if (*code == ']') {
|
|
break;
|
|
}
|
|
}
|
|
return out;
|
|
}
|
|
|
|
R_API char* r_hex_from_py(const char *code) {
|
|
if (!code) {
|
|
return NULL;
|
|
}
|
|
char * const ret = malloc (strlen (code) * 3);
|
|
if (!ret) {
|
|
return NULL;
|
|
}
|
|
*ret = '\0';
|
|
char *out = ret;
|
|
const char *tmp_code = strchr (code, '=');
|
|
if (tmp_code) {
|
|
code = tmp_code;
|
|
}
|
|
for (; *code && *code != '[' && *code != '\''
|
|
&& *code != '"'; code++) {
|
|
code = skip_comment_py (code);
|
|
}
|
|
if (*code == '[') {
|
|
out = r_hex_from_py_array (out, code);
|
|
} else if (*code == '"' || *code == '\'') {
|
|
out = r_hex_from_py_str (out, code);
|
|
}
|
|
if (!out) {
|
|
free (ret);
|
|
return NULL;
|
|
}
|
|
*out = '\0';
|
|
return ret;
|
|
}
|
|
|
|
R_API char *r_hex_from_c_str(char *out, const char **code) {
|
|
const char abc[] = "0123456789abcdefABCDEF";
|
|
const char *iter = *code;
|
|
if (*iter != '\'' && *iter != '"') {
|
|
return NULL;
|
|
}
|
|
const char end_char = *iter;
|
|
iter++;
|
|
for (; *iter && *iter != end_char; iter++) {
|
|
if (*iter == '\\') {
|
|
iter++;
|
|
switch (iter[0]) {
|
|
case 'e': *out++='1';*out++='b';break;
|
|
case 'r': *out++='0';*out++='d';break;
|
|
case 'n': *out++='0';*out++='a';break;
|
|
case 'x': {
|
|
char c1 = iter[1];
|
|
char c2 = iter[2];
|
|
iter += 2;
|
|
if (c1 == '\0' || c2 == '\0') {
|
|
return NULL;
|
|
} else if (strchr (abc, c1) && strchr (abc, c2)) {
|
|
*out++ = tolower (c1);
|
|
*out++ = tolower (c2);
|
|
} else {
|
|
return NULL;
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
if (iter[0] == end_char) {
|
|
*out++ = abc[*iter >> 4];
|
|
*out++ = abc[*iter & 0xf];
|
|
}
|
|
return NULL;
|
|
}
|
|
} else {
|
|
*out++ = abc[*iter >> 4];
|
|
*out++ = abc[*iter & 0xf];
|
|
}
|
|
}
|
|
*code = iter;
|
|
return out;
|
|
}
|
|
|
|
const char *skip_comment_c(const char *code) {
|
|
if (!strncmp (code, "/*", 2)) {
|
|
char *end = strstr (code, "*/");
|
|
if (end) {
|
|
code = end + 2;
|
|
} else {
|
|
eprintf ("Missing closing comment\n");
|
|
}
|
|
} else if (!strncmp (code, "//", 2)) {
|
|
char *end = strchr (code, '\n');
|
|
if (end) {
|
|
code = end + 2;
|
|
}
|
|
}
|
|
return code;
|
|
}
|
|
|
|
R_API char *r_hex_from_c_array(char *out, const char *code) {
|
|
const char abc[] = "0123456789abcdef";
|
|
if (*code != '{' || !strchr(code, '}')) {
|
|
return NULL;
|
|
}
|
|
code++;
|
|
for (; *code; code++) {
|
|
const char *comma = strchr (code, ',');
|
|
if (!comma) {
|
|
comma = strchr (code, '}');
|
|
}
|
|
char * _word = r_str_ndup (code, comma - code);
|
|
const char *word = _word;
|
|
word = skip_comment_c (word);
|
|
while (*word == ' ' || *word == '\t' || *word == '\n') {
|
|
word++;
|
|
word = skip_comment_c (word);
|
|
}
|
|
if (IS_DIGIT (*word)) {
|
|
ut8 n = (ut8)r_num_math (NULL, word);
|
|
*out++ = abc[(n >> 4) & 0xf];
|
|
*out++ = abc[n & 0xf];
|
|
}
|
|
free (_word);
|
|
code = comma;
|
|
if (*code == '}') {
|
|
break;
|
|
}
|
|
}
|
|
return out;
|
|
}
|
|
|
|
/* convert:
|
|
* char *foo = "\x41\x23\x42\x1b";
|
|
* into:
|
|
* 4123421b
|
|
*/
|
|
R_API char *r_hex_from_c(const char *code) {
|
|
if (!code) {
|
|
return NULL;
|
|
}
|
|
char * const ret = malloc (strlen (code) * 3);
|
|
if (!ret) {
|
|
return NULL;
|
|
}
|
|
*ret = '\0';
|
|
char *out = ret;
|
|
const char *tmp_code = strchr (code, '=');
|
|
if (tmp_code) {
|
|
code = tmp_code;
|
|
}
|
|
for (; *code != '\0' && *code != '{' && *code != '"'; code++) {
|
|
code = skip_comment_c (code);
|
|
}
|
|
if (*code == '{') {
|
|
out = r_hex_from_c_array (out, code);
|
|
} else if (*code == '"') {
|
|
const char *s1, *s2;
|
|
s1 = code;
|
|
do {
|
|
code = s1;
|
|
out = r_hex_from_c_str (out, &code);
|
|
if (!out) {
|
|
break;
|
|
}
|
|
s1 = strchr (code + 1, '"');
|
|
s2 = strchr (code + 1, ';');
|
|
} while (s1 && s2 && (s1 <= s2));
|
|
}
|
|
if (!out) {
|
|
free (ret);
|
|
return NULL;
|
|
}
|
|
*out = '\0';
|
|
return ret;
|
|
}
|
|
|
|
/* convert
|
|
* "\x41\x23\x42\x1b"
|
|
* "\x41\x23\x42\x1b"
|
|
* into
|
|
* 4123421b4123421b
|
|
*/
|
|
R_API char *r_hex_no_code(const char *code) {
|
|
if (!code) {
|
|
return NULL;
|
|
}
|
|
char * const ret = malloc (strlen (code) * 3);
|
|
if (!ret) {
|
|
return NULL;
|
|
}
|
|
*ret = '\0';
|
|
char *out = ret;
|
|
out = r_hex_from_c_str (out, &code);
|
|
code = strchr (code + 1, '"');
|
|
if (!out) {
|
|
free (ret);
|
|
return NULL;
|
|
}
|
|
*out = '\0';
|
|
while (out && code) {
|
|
*out = '\0';
|
|
out = r_hex_from_c_str (out, &code);
|
|
code = strchr (code + 1, '"');
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
R_API char *r_hex_from_code(const char *code) {
|
|
if (!strchr (code, '=')) {
|
|
return r_hex_no_code (code);
|
|
} else if (strstr (code, "char") || strstr (code, "int")) {
|
|
//C language
|
|
return r_hex_from_c (code);
|
|
} else {
|
|
// Python
|
|
return r_hex_from_py (code);
|
|
}
|
|
}
|
|
|
|
/* int byte = hexpair2bin("A0"); */
|
|
// (0A) => 10 || -1 (on error)
|
|
R_API int r_hex_pair2bin(const char *arg) {
|
|
ut8 *ptr, c = 0, d = 0;
|
|
ut32 j = 0;
|
|
|
|
for (ptr = (ut8*)arg; ;ptr = ptr + 1) {
|
|
if (!*ptr || *ptr==' ' || j==2) {
|
|
break;
|
|
}
|
|
d = c;
|
|
if (*ptr!='.' && r_hex_to_byte (&c, *ptr)) {
|
|
eprintf ("Invalid hexa string at char '%c' (%s).\n",
|
|
*ptr, arg);
|
|
return -1;
|
|
}
|
|
c |= d;
|
|
if (j++ == 0) {
|
|
c <<= 4;
|
|
}
|
|
}
|
|
return (int)c;
|
|
}
|
|
|
|
R_API int r_hex_bin2str(const ut8 *in, int len, char *out) {
|
|
int i, idx;
|
|
char tmp[5];
|
|
if (len < 0)
|
|
return 0;
|
|
for (idx = i = 0; i < len; i++, idx += 2) {
|
|
snprintf (tmp, sizeof (tmp), "%02x", in[i]);
|
|
memcpy (out+idx, tmp, 2);
|
|
}
|
|
out[idx] = 0;
|
|
return len;
|
|
}
|
|
|
|
R_API char *r_hex_bin2strdup(const ut8 *in, int len) {
|
|
int i, idx;
|
|
char tmp[5], *out;
|
|
|
|
if ((len + 1) * 2 < len) return NULL;
|
|
out = malloc ((len + 1) * 2);
|
|
if (!out) return NULL;
|
|
for (i = idx = 0; i < len; i++, idx += 2) {
|
|
snprintf (tmp, sizeof (tmp), "%02x", in[i]);
|
|
memcpy (out+idx, tmp, 2);
|
|
}
|
|
out[idx] = 0;
|
|
return out;
|
|
}
|
|
|
|
R_API int r_hex_str2bin(const char *in, ut8 *out) {
|
|
long nibbles = 0;
|
|
|
|
while (in && *in) {
|
|
ut8 tmp;
|
|
/* skip hex prefix */
|
|
if (*in == '0' && in[1] == 'x') {
|
|
in += 2;
|
|
}
|
|
/* read hex digits */
|
|
while (!r_hex_to_byte (out ? &out[nibbles/2] : &tmp, *in)) {
|
|
nibbles++;
|
|
in++;
|
|
}
|
|
if (*in == '\0') {
|
|
break;
|
|
}
|
|
/* comments */
|
|
if (*in == '#' || (*in == '/' && in[1] == '/')) {
|
|
if ((in = strchr (in, '\n'))) {
|
|
in++;
|
|
}
|
|
continue;
|
|
} else if (*in == '/' && in[1] == '*') {
|
|
if ((in = strstr (in, "*/"))) {
|
|
in += 2;
|
|
}
|
|
continue;
|
|
} else if (!IS_WHITESPACE (*in) && *in != '\n') {
|
|
/* this is not a valid string */
|
|
return 0;
|
|
}
|
|
/* ignore character */
|
|
in++;
|
|
}
|
|
|
|
if (nibbles % 2) {
|
|
if (out) r_hex_to_byte (&out[nibbles/2], '0');
|
|
return -(nibbles+1) / 2;
|
|
}
|
|
|
|
return nibbles / 2;
|
|
}
|
|
|
|
R_API int r_hex_str2binmask(const char *in, ut8 *out, ut8 *mask) {
|
|
ut8 *ptr;
|
|
int len, ilen = strlen (in)+1;
|
|
int has_nibble = 0;
|
|
memcpy (out, in, ilen);
|
|
for (ptr=out; *ptr; ptr++) if (*ptr=='.') *ptr = '0';
|
|
len = r_hex_str2bin ((char*)out, out);
|
|
if (len<0) { has_nibble = 1; len = -(len+1); }
|
|
if (len != -1) {
|
|
memcpy (mask, in, ilen);
|
|
if (has_nibble)
|
|
memcpy (mask+ilen, "f0", 3);
|
|
for (ptr=mask; *ptr; ptr++) *ptr = (*ptr=='.')?'0':'f';
|
|
len = r_hex_str2bin ((char*)mask, mask);
|
|
if (len<0) len++;
|
|
}
|
|
return len;
|
|
}
|
|
|
|
R_API st64 r_hex_bin_truncate (ut64 in, int n) {
|
|
switch (n) {
|
|
case 1:
|
|
if ((in&UT8_GT0))
|
|
return UT64_8U|in;
|
|
return in&UT8_MAX;
|
|
case 2:
|
|
if ((in&UT16_GT0))
|
|
return UT64_16U|in;
|
|
return in&UT16_MAX;
|
|
case 4:
|
|
if ((in&UT32_GT0))
|
|
return UT64_32U|in;
|
|
return in&UT32_MAX;
|
|
case 8:
|
|
return in&UT64_MAX;
|
|
}
|
|
return in;
|
|
}
|
|
|
|
// Check if str contains only hexademical characters and return length of bytes
|
|
R_API int r_hex_str_is_valid(const char* str) {
|
|
int i;
|
|
if (!strncmp (str, "0x", 2)) {
|
|
str += 2;
|
|
}
|
|
for (i = 0; str[i] != '\0' && str[i] != ' '; i++) {
|
|
if (ISHEXCHAR (str[i])) {
|
|
continue;
|
|
}
|
|
return -1; //if we're here, then str isnt valid
|
|
}
|
|
return i;
|
|
}
|