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Main: fix potential buffer overflow (closes #25)

This commit is contained in:
Alex Kotov 2022-02-01 08:47:31 +05:00
parent 8c2c865d46
commit 2a510851e4
Signed by: kotovalexarian
GPG Key ID: 553C0EBBEB5D5F08
2 changed files with 7 additions and 6 deletions
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4
ChangeLog
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@ -1,3 +1,7 @@
2022-02-01 Alex Kotov <kotovalexarian@gmail.com>
* src/printf.c: Fix potential buffer overflow
2022-01-24 Alex Kotov <kotovalexarian@gmail.com>
* include/kernaux/ntoa.h: Add func "kernaux_itoa"

9
src/printf.c
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@ -576,6 +576,7 @@ size_t _ntoa_long_long(out_fct_type out, char* buffer, size_t idx, size_t maxlen
* Idea: superleaf1995
* Implementation: smwmaster
*/
static const size_t map_size = 630;
static const char *const map =
"\xD3\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9"
"\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xD3\xF9\xF9"
@ -611,15 +612,11 @@ static const char *const map =
"\xF7\xF9\xF9\xD3\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9"
"\xF9\xF9\xF9\xF9\xF5\xB2\x96\xE9\xE9\x96\xA1\xBD\xF5\xF9\xF9\xF9\xF9\xF9"
"\xD3\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9"
"\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xD3\xD3\xD9"
"\xD9\xD9\xC1\x04&&i\x05&&i\x05&&\xC9\x04&&i\x05&&i\x05&&i\x05&&i\x05&&i"
"\x05&&i\x05&&i\x05&&\xD1\x04&&i\x05&&\xD9\x04&&i\x05&&i\x05&&)\x05&&\xFB"
"\x06&&-\x05&&-\x05&&-\x05&&-\x05&&-\x05&&-\x05&&-\x05&&-\x05&&-\x05&&-\x05"
"&&-\x05&&-\x05&&-\x05&&-\x05&&-\x05&&-\x05&&-\x05&&-\x05&&-\x05&&-\x05&&"
"\xD1\x06&&-\x05&&\xCA\x04&&-\x05&&";
"\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xF9\xD3\xD3\xD9";
char _custom(const unsigned int flags, size_t *const index)
{
if (*index >= map_size) return '\0';
return map[(*index)++] ^ (73 + ((flags >> 8) | 128));
}
#endif // ENABLE_BLOAT