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0042752a08
> The function magic_close has return type void, but x is of a pointer type.
> Yet the C standard requires that the second and third argument of the
> conditional operator ?: are both void or compatible pointer types (there
> are several other cases, see 6.5.15 of the C Standard). Failing this, the
> compiler may produce arbitrary code.
> The best way to fix this is likely changing the definition to
> { if(x) {magic_close(x);} }.
321 lines
9.8 KiB
C
321 lines
9.8 KiB
C
/* radare - LGPL - Copyright 2011-2013 - pancake */
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#ifndef R_MAGIC_H
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#define R_MAGIC_H
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#include <r_types.h>
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#ifndef MAGIC
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#define MAGIC "/etc/magic"
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#endif
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#define R_MAGIC_PATH R2_LIBDIR"/radare2/"R2_VERSION"/magic"
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#if USE_LIB_MAGIC
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#include <magic.h>
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#ifdef R_API
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#define RMagic struct magic_set
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#define r_magic_new(x) magic_open(x)
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#define r_magic_free(x) { if (x) { magic_close(x); }}
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#define r_magic_file(x,y) magic_file(x,y)
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#define r_magic_buffer(x,y,z) magic_buffer(x,y,z)
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#define r_magic_descriptor(x,y) magic_descriptor(x,y)
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#define r_magic_error(x) magic_error(x)
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#define r_magic_setflags(x,y) magic_setflags(x,y)
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#define r_magic_load(x,y) magic_load(x,y)
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#define r_magic_compile(x,y) magic_compile(x,y)
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#define r_magic_check(x,y) magic_check(x,y)
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#define r_magic_errno(x) magic_errno(x)
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#endif
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#else
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#ifdef R_API
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#ifdef __EMX__
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#define PATHSEP ';'
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#else
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#define PATHSEP ':'
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#endif
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/* limits */
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#ifndef HOWMANY
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# define HOWMANY (256 * 1024) /* how much of the file to look at */
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#endif
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#define MAXDESC 64
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#define MAXMAGIS 8192 /* max entries in any one magic file or directory */
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#define MAXstring 32 /* max leng of "string" types */
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/* define this outside to fix build for g++ */
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union VALUETYPE {
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ut8 b;
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ut16 h;
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ut32 l;
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ut64 q;
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ut8 hs[2]; /* 2 bytes of a fixed-endian "short" */
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ut8 hl[4]; /* 4 bytes of a fixed-endian "long" */
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ut8 hq[8]; /* 8 bytes of a fixed-endian "quad" */
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char s[MAXstring]; /* the search string or regex pattern */
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float f;
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double d;
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}; /* either number or string */
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/* constants */
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#define MAGICNO 0xF11E041C
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#define VERSIONNO 5
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#define FILE_MAGICSIZE (32 * 6)
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#define FILE_LOAD 0
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#define FILE_CHECK 1
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#define FILE_COMPILE 2
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struct r_magic {
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/* Word 1 */
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ut16 cont_level; /* level of ">" */
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ut8 flag;
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#define INDIR 0x01 /* if '(...)' appears */
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#define OFFADD 0x02 /* if '>&' or '>...(&' appears */
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#define INDIROFFADD 0x04 /* if '>&(' appears */
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#define UNSIGNED 0x08 /* comparison is unsigned */
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#define NOSPACE 0x10 /* suppress space character before output */
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#define BINTEST 0x20 /* test is for a binary type (set only
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for top-level tests) */
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#define TEXTTEST 0 /* for passing to file_softmagic */
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ut8 dummy1;
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/* Word 2 */
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ut8 reln; /* relation (0=eq, '>'=gt, etc) */
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ut8 vallen; /* length of string value, if any */
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ut8 type; /* comparison type (FILE_*) */
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ut8 in_type; /* type of indirection */
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#define FILE_INVALID 0
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#define FILE_BYTE 1
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#define FILE_SHORT 2
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#define FILE_DEFAULT 3
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#define FILE_LONG 4
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#define FILE_STRING 5
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#define FILE_DATE 6
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#define FILE_BESHORT 7
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#define FILE_BELONG 8
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#define FILE_BEDATE 9
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#define FILE_LESHORT 10
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#define FILE_LELONG 11
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#define FILE_LEDATE 12
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#define FILE_PSTRING 13
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#define FILE_LDATE 14
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#define FILE_BELDATE 15
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#define FILE_LELDATE 16
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#define FILE_REGEX 17
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#define FILE_BESTRING16 18
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#define FILE_LESTRING16 19
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#define FILE_SEARCH 20
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#define FILE_MEDATE 21
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#define FILE_MELDATE 22
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#define FILE_MELONG 23
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#define FILE_QUAD 24
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#define FILE_LEQUAD 25
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#define FILE_BEQUAD 26
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#define FILE_QDATE 27
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#define FILE_LEQDATE 28
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#define FILE_BEQDATE 29
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#define FILE_QLDATE 30
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#define FILE_LEQLDATE 31
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#define FILE_BEQLDATE 32
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#define FILE_FLOAT 33
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#define FILE_BEFLOAT 34
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#define FILE_LEFLOAT 35
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#define FILE_DOUBLE 36
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#define FILE_BEDOUBLE 37
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#define FILE_LEDOUBLE 38
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#define FILE_NAMES_SIZE 39 /* size of array to contain all names */
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#define MAGIC_IS_STRING(t) \
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((t) == FILE_STRING || \
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(t) == FILE_PSTRING || \
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(t) == FILE_BESTRING16 || \
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(t) == FILE_LESTRING16 || \
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(t) == FILE_REGEX || \
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(t) == FILE_SEARCH || \
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(t) == FILE_DEFAULT)
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#define FILE_FMT_NONE 0
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#define FILE_FMT_NUM 1 /* "cduxXi" */
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#define FILE_FMT_STR 2 /* "s" */
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#define FILE_FMT_QUAD 3 /* "ll" */
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#define FILE_FMT_FLOAT 4 /* "eEfFgG" */
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#define FILE_FMT_DOUBLE 5 /* "eEfFgG" */
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/* Word 3 */
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ut8 in_op; /* operator for indirection */
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ut8 mask_op; /* operator for mask */
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ut8 cond; /* conditional type */
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ut8 dummy2;
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#define FILE_OPS "&|^+-*/%"
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#define FILE_OPAND 0
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#define FILE_OPOR 1
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#define FILE_OPXOR 2
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#define FILE_OPADD 3
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#define FILE_OPMINUS 4
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#define FILE_OPMULTIPLY 5
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#define FILE_OPDIVIDE 6
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#define FILE_OPMODULO 7
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#define FILE_OPS_MASK 0x07 /* mask for above ops */
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#define FILE_UNUSED_1 0x08
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#define FILE_UNUSED_2 0x10
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#define FILE_UNUSED_3 0x20
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#define FILE_OPINVERSE 0x40
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#define FILE_OPINDIRECT 0x80
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#define COND_NONE 0
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#define COND_IF 1
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#define COND_ELIF 2
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#define COND_ELSE 3
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/* Word 4 */
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ut32 offset; /* offset to magic number */
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/* Word 5 */
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ut32 in_offset; /* offset from indirection */
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/* Word 6 */
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ut32 lineno; /* line number in magic file */
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/* Word 7,8 */
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union {
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ut64 _mask; /* for use with numeric and date types */
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struct {
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ut32 _count; /* repeat/line count */
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ut32 _flags; /* modifier flags */
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} _s; /* for use with string types */
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} _u;
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#define num_mask _u._mask
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#define str_range _u._s._count
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#define str_flags _u._s._flags
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/* Words 9-16 */
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union VALUETYPE value;
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/* Words 17..31 */
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char desc[MAXDESC]; /* description */
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/* Words 32..47 */
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char mimetype[MAXDESC]; /* MIME type */
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};
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#define BIT(A) (1 << (A))
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#define STRING_COMPACT_BLANK BIT(0)
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#define STRING_COMPACT_OPTIONAL_BLANK BIT(1)
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#define STRING_IGNORE_LOWERCASE BIT(2)
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#define STRING_IGNORE_UPPERCASE BIT(3)
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#define REGEX_OFFSET_START BIT(4)
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#define CHAR_COMPACT_BLANK 'B'
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#define CHAR_COMPACT_OPTIONAL_BLANK 'b'
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#define CHAR_IGNORE_LOWERCASE 'c'
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#define CHAR_IGNORE_UPPERCASE 'C'
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#define CHAR_REGEX_OFFSET_START 's'
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#define STRING_IGNORE_CASE (STRING_IGNORE_LOWERCASE|STRING_IGNORE_UPPERCASE)
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#define STRING_DEFAULT_RANGE 100
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/* list of magic entries */
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struct mlist {
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struct r_magic *magic; /* array of magic entries */
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ut32 nmagic; /* number of entries in array */
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int mapped; /* allocation type: 0 => apprentice_file
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* 1 => apprentice_map + malloc
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* 2 => apprentice_map + mmap */
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struct mlist *next, *prev;
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};
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#define R_MAGIC_NONE 0x000000 /* No flags */
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#define R_MAGIC_DEBUG 0x000001 /* Turn on debugging */
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#define R_MAGIC_SYMLINK 0x000002 /* Follow symlinks */
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#define R_MAGIC_COMPRESS 0x000004 /* Check inside compressed files */
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#define R_MAGIC_DEVICES 0x000008 /* Look at the contents of devices */
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#define R_MAGIC_MIME_TYPE 0x000010 /* Return only the MIME type */
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#define R_MAGIC_CONTINUE 0x000020 /* Return all matches */
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#define R_MAGIC_CHECK 0x000040 /* Print warnings to stderr */
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#define R_MAGIC_PRESERVE_ATIME 0x000080 /* Restore access time on exit */
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#define R_MAGIC_RAW 0x000100 /* Don't translate unprint chars */
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#define R_MAGIC_ERROR 0x000200 /* Handle ENOENT etc as real errors */
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#define R_MAGIC_MIME_ENCODING 0x000400 /* Return only the MIME encoding */
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#define R_MAGIC_MIME (R_MAGIC_MIME_TYPE|R_MAGIC_MIME_ENCODING)
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#define R_MAGIC_NO_CHECK_COMPRESS 0x001000 /* Don't check for compressed files */
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#define R_MAGIC_NO_CHECK_TAR 0x002000 /* Don't check for tar files */
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#define R_MAGIC_NO_CHECK_SOFT 0x004000 /* Don't check magic entries */
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#define R_MAGIC_NO_CHECK_APPTYPE 0x008000 /* Don't check application type */
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#define R_MAGIC_NO_CHECK_ELF 0x010000 /* Don't check for elf details */
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#define R_MAGIC_NO_CHECK_ASCII 0x020000 /* Don't check for ascii files */
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#define R_MAGIC_NO_CHECK_TOKENS 0x100000 /* Don't check ascii/tokens */
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/* Defined for backwards compatibility; do nothing */
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#define MAGIC_NO_CHECK_FORTRAN 0x000000 /* Don't check ascii/fortran */
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#define MAGIC_NO_CHECK_TROFF 0x000000 /* Don't check ascii/troff */
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struct r_magic_set {
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struct mlist *mlist;
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struct cont {
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size_t len;
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struct level_info {
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st32 off;
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int got_match;
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int last_match;
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int last_cond; /* used for error checking by parse() */
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} *li;
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} c;
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struct out {
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char *buf; /* Accumulation buffer */
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char *pbuf; /* Printable buffer */
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} o;
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ut32 offset;
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int error;
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int flags;
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int haderr;
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const char *file;
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size_t line; /* current magic line number */
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/* data for searches */
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struct {
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const char *s; /* start of search in original source */
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size_t s_len; /* length of search region */
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size_t offset; /* starting offset in source: XXX - should this be off_t? */
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size_t rm_len; /* match length */
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} search;
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/* FIXME: Make the string dynamically allocated so that e.g.
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strings matched in files can be longer than MAXstring */
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union VALUETYPE ms_value; /* either number or string */
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};
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct r_magic_set RMagic;
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#ifdef R_API
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R_API RMagic* r_magic_new(int flags);
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R_API void r_magic_free(RMagic*);
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R_API const char *r_magic_file(RMagic*, const char *);
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R_API const char *r_magic_descriptor(RMagic*, int);
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R_API const char *r_magic_buffer(RMagic*, const void *, size_t);
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R_API const char *r_magic_error(RMagic*);
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R_API void r_magic_setflags(RMagic*, int);
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R_API int r_magic_load(RMagic*, const char *);
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R_API int r_magic_compile(RMagic*, const char *);
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R_API int r_magic_check(RMagic*, const char *);
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R_API int r_magic_errno(RMagic*);
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#endif
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#ifdef __cplusplus
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};
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#endif
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#endif
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#endif // USE_LIB_MAGIC
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#endif /* _MAGIC_H */
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