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radare2/libr/include/r_magic.h
meme fcf4d8dcad
Add size parameter to r_magic_load_buffer ##util (#18760) 
It is still UTF-8, and thus not valid to have a NULL inside of the the
file, but sometimes inputs are not NULL-terminated
2021-05-27 16:27:04 +02:00

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9.2 KiB
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/* radare - LGPL - Copyright 2011-2014 - pancake */
#ifndef R2_MAGIC_H
#define R2_MAGIC_H
#include <r_types.h>
#ifdef __cplusplus
extern "C" {
#endif
R_LIB_VERSION_HEADER(r_magic);
#ifdef R_API
#ifdef __EMX__
#define PATHSEP ';'
#else
#define PATHSEP ':'
#endif
/* limits */
#ifndef HOWMANY
# define HOWMANY (256 * 1024) /* how much of the file to look at */
#endif
#define MAXDESC 64
#define MAXMAGIS 8192 /* max entries in any one magic file or directory */
#define MAXstring 32 /* max leng of "string" types */
/* define this outside to fix build for g++ */
union VALUETYPE {
ut8 b;
ut16 h;
ut32 l;
ut64 q;
ut8 hs[2]; /* 2 bytes of a fixed-endian "short" */
ut8 hl[4]; /* 4 bytes of a fixed-endian "long" */
ut8 hq[8]; /* 8 bytes of a fixed-endian "quad" */
char s[MAXstring]; /* the search string or regex pattern */
float f;
double d;
}; /* either number or string */
/* constants */
#define MAGICNO 0xF11E041C
#define VERSIONNO 5
#define FILE_MAGICSIZE (32 * 6)
#define FILE_LOAD 0
#define FILE_CHECK 1
#define FILE_COMPILE 2
struct r_magic {
/* Word 1 */
ut16 cont_level; /* level of ">" */
ut8 flag;
#define INDIR 0x01 /* if '(...)' appears */
#define OFFADD 0x02 /* if '>&' or '>...(&' appears */
#define INDIROFFADD 0x04 /* if '>&(' appears */
#define UNSIGNED 0x08 /* comparison is unsigned */
#define NOSPACE 0x10 /* suppress space character before output */
#define BINTEST 0x20 /* test is for a binary type (set only
for top-level tests) */
#define TEXTTEST 0 /* for passing to file_softmagic */
ut8 dummy1;
/* Word 2 */
ut8 reln; /* relation (0=eq, '>'=gt, etc) */
ut8 vallen; /* length of string value, if any */
ut8 type; /* comparison type (FILE_*) */
ut8 in_type; /* type of indirection */
#define FILE_INVALID 0
#define FILE_BYTE 1
#define FILE_SHORT 2
#define FILE_DEFAULT 3
#define FILE_LONG 4
#define FILE_STRING 5
#define FILE_DATE 6
#define FILE_BESHORT 7
#define FILE_BELONG 8
#define FILE_BEDATE 9
#define FILE_LESHORT 10
#define FILE_LELONG 11
#define FILE_LEDATE 12
#define FILE_PSTRING 13
#define FILE_LDATE 14
#define FILE_BELDATE 15
#define FILE_LELDATE 16
#define FILE_REGEX 17
#define FILE_BESTRING16 18
#define FILE_LESTRING16 19
#define FILE_SEARCH 20
#define FILE_MEDATE 21
#define FILE_MELDATE 22
#define FILE_MELONG 23
#define FILE_QUAD 24
#define FILE_LEQUAD 25
#define FILE_BEQUAD 26
#define FILE_QDATE 27
#define FILE_LEQDATE 28
#define FILE_BEQDATE 29
#define FILE_QLDATE 30
#define FILE_LEQLDATE 31
#define FILE_BEQLDATE 32
#define FILE_FLOAT 33
#define FILE_BEFLOAT 34
#define FILE_LEFLOAT 35
#define FILE_DOUBLE 36
#define FILE_BEDOUBLE 37
#define FILE_LEDOUBLE 38
#define FILE_NAMES_SIZE 39 /* size of array to contain all names */
#define MAGIC_IS_STRING(t) \
((t) == FILE_STRING || \
(t) == FILE_PSTRING || \
(t) == FILE_BESTRING16 || \
(t) == FILE_LESTRING16 || \
(t) == FILE_REGEX || \
(t) == FILE_SEARCH || \
(t) == FILE_DEFAULT)
#define FILE_FMT_NONE 0
#define FILE_FMT_NUM 1 /* "cduxXi" */
#define FILE_FMT_STR 2 /* "s" */
#define FILE_FMT_QUAD 3 /* "ll" */
#define FILE_FMT_FLOAT 4 /* "eEfFgG" */
#define FILE_FMT_DOUBLE 5 /* "eEfFgG" */
/* Word 3 */
ut8 in_op; /* operator for indirection */
ut8 mask_op; /* operator for mask */
ut8 cond; /* conditional type */
ut8 dummy2;
#define FILE_OPS "&|^+-*/%"
#define FILE_OPAND 0
#define FILE_OPOR 1
#define FILE_OPXOR 2
#define FILE_OPADD 3
#define FILE_OPMINUS 4
#define FILE_OPMULTIPLY 5
#define FILE_OPDIVIDE 6
#define FILE_OPMODULO 7
#define FILE_OPS_MASK 0x07 /* mask for above ops */
#define FILE_UNUSED_1 0x08
#define FILE_UNUSED_2 0x10
#define FILE_UNUSED_3 0x20
#define FILE_OPINVERSE 0x40
#define FILE_OPINDIRECT 0x80
#define COND_NONE 0
#define COND_IF 1
#define COND_ELIF 2
#define COND_ELSE 3
/* Word 4 */
ut32 offset; /* offset to magic number */
/* Word 5 */
ut32 in_offset; /* offset from indirection */
/* Word 6 */
ut32 lineno; /* line number in magic file */
/* Word 7,8 */
union {
ut64 _mask; /* for use with numeric and date types */
struct {
ut32 _count; /* repeat/line count */
ut32 _flags; /* modifier flags */
} _s; /* for use with string types */
} _u;
#define num_mask _u._mask
#define str_range _u._s._count
#define str_flags _u._s._flags
/* Words 9-16 */
union VALUETYPE value;
/* Words 17..31 */
char desc[MAXDESC]; /* description */
/* Words 32..47 */
char mimetype[MAXDESC]; /* MIME type */
};
#define BIT(A) (1 << (A))
#define STRING_COMPACT_BLANK BIT(0)
#define STRING_COMPACT_OPTIONAL_BLANK BIT(1)
#define STRING_IGNORE_LOWERCASE BIT(2)
#define STRING_IGNORE_UPPERCASE BIT(3)
#define REGEX_OFFSET_START BIT(4)
#define CHAR_COMPACT_BLANK 'B'
#define CHAR_COMPACT_OPTIONAL_BLANK 'b'
#define CHAR_IGNORE_LOWERCASE 'c'
#define CHAR_IGNORE_UPPERCASE 'C'
#define CHAR_REGEX_OFFSET_START 's'
#define STRING_IGNORE_CASE (STRING_IGNORE_LOWERCASE|STRING_IGNORE_UPPERCASE)
#define STRING_DEFAULT_RANGE 100
/* list of magic entries */
struct mlist {
struct r_magic *magic; /* array of magic entries */
ut32 nmagic; /* number of entries in array */
int mapped; /* allocation type: 0 => apprentice_file
* 1 => apprentice_map + malloc
* 2 => apprentice_map + mmap */
struct mlist *next, *prev;
};
#define R_MAGIC_NONE 0x000000 /* No flags */
#define R_MAGIC_DEBUG 0x000001 /* Turn on debugging */
#define R_MAGIC_SYMLINK 0x000002 /* Follow symlinks */
#define R_MAGIC_COMPRESS 0x000004 /* Check inside compressed files */
#define R_MAGIC_DEVICES 0x000008 /* Look at the contents of devices */
#define R_MAGIC_MIME_TYPE 0x000010 /* Return only the MIME type */
#define R_MAGIC_CONTINUE 0x000020 /* Return all matches */
#define R_MAGIC_CHECK 0x000040 /* Print warnings to stderr */
#define R_MAGIC_PRESERVE_ATIME 0x000080 /* Restore access time on exit */
#define R_MAGIC_RAW 0x000100 /* Don't translate unprint chars */
#define R_MAGIC_ERROR 0x000200 /* Handle ENOENT etc as real errors */
#define R_MAGIC_MIME_ENCODING 0x000400 /* Return only the MIME encoding */
#define R_MAGIC_MIME (R_MAGIC_MIME_TYPE|R_MAGIC_MIME_ENCODING)
#define R_MAGIC_NO_CHECK_COMPRESS 0x001000 /* Don't check for compressed files */
#define R_MAGIC_NO_CHECK_TAR 0x002000 /* Don't check for tar files */
#define R_MAGIC_NO_CHECK_SOFT 0x004000 /* Don't check magic entries */
#define R_MAGIC_NO_CHECK_APPTYPE 0x008000 /* Don't check application type */
#define R_MAGIC_NO_CHECK_ELF 0x010000 /* Don't check for elf details */
#define R_MAGIC_NO_CHECK_ASCII 0x020000 /* Don't check for ascii files */
#define R_MAGIC_NO_CHECK_TOKENS 0x100000 /* Don't check ascii/tokens */
/* Defined for backwards compatibility; do nothing */
#define MAGIC_NO_CHECK_FORTRAN 0x000000 /* Don't check ascii/fortran */
#define MAGIC_NO_CHECK_TROFF 0x000000 /* Don't check ascii/troff */
struct r_magic_set {
struct mlist *mlist;
struct cont {
size_t len;
struct level_info {
st32 off;
int got_match;
int last_match;
int last_cond; /* used for error checking by parse() */
} *li;
} c;
struct out {
char *buf; /* Accumulation buffer */
char *pbuf; /* Printable buffer */
} o;
ut32 offset;
int error;
int flags;
int haderr;
const char *file;
size_t line; /* current magic line number */
/* data for searches */
struct {
const char *s; /* start of search in original source */
size_t s_len; /* length of search region */
size_t offset; /* starting offset in source: XXX - should this be off_t? */
size_t rm_len; /* match length */
} search;
/* FIXME: Make the string dynamically allocated so that e.g.
strings matched in files can be longer than MAXstring */
union VALUETYPE ms_value; /* either number or string */
};
#if USE_LIB_MAGIC
#define RMagic struct magic_set
#else
typedef struct r_magic_set RMagic;
#endif
#ifdef R_API
R_API RMagic* r_magic_new(int flags);
R_API void r_magic_free(RMagic*);
R_API const char *r_magic_file(RMagic*, const char *);
R_API const char *r_magic_descriptor(RMagic*, int);
R_API const char *r_magic_buffer(RMagic*, const void *, size_t);
R_API const char *r_magic_error(RMagic*);
R_API void r_magic_setflags(RMagic*, int);
R_API bool r_magic_load(RMagic*, const char *);
R_API bool r_magic_load_buffer(RMagic*, const ut8 *, size_t);
R_API bool r_magic_compile(RMagic*, const char *);
R_API bool r_magic_check(RMagic*, const char *);
R_API int r_magic_errno(RMagic*);
#endif
#endif
#ifdef __cplusplus
}
#endif
#endif /* _MAGIC_H */
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