2 * Copyright (c) Ian F. Darwin 1986-1995.
3 * Software written by Ian F. Darwin and others;
4 * maintained 1995-present by Christos Zoulas and others.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice immediately at the beginning of the file, without modification,
11 * this list of conditions, and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * softmagic - interpret variable magic from MAGIC
35 FILE_RCSID("@(#)$File: softmagic.c,v 1.147 2011/11/05 15:44:22 rrt Exp $")
45 private int match(struct magic_set *, struct magic *, uint32_t,
46 const unsigned char *, size_t, int, int);
47 private int mget(struct magic_set *, const unsigned char *,
48 struct magic *, size_t, unsigned int, int);
49 private int magiccheck(struct magic_set *, struct magic *);
50 private int32_t mprint(struct magic_set *, struct magic *);
51 private int32_t moffset(struct magic_set *, struct magic *);
52 private void mdebug(uint32_t, const char *, size_t);
53 private int mcopy(struct magic_set *, union VALUETYPE *, int, int,
54 const unsigned char *, uint32_t, size_t, size_t);
55 private int mconvert(struct magic_set *, struct magic *);
56 private int print_sep(struct magic_set *, int);
57 private int handle_annotation(struct magic_set *, struct magic *);
58 private void cvt_8(union VALUETYPE *, const struct magic *);
59 private void cvt_16(union VALUETYPE *, const struct magic *);
60 private void cvt_32(union VALUETYPE *, const struct magic *);
61 private void cvt_64(union VALUETYPE *, const struct magic *);
64 * softmagic - lookup one file in parsed, in-memory copy of database
65 * Passed the name and FILE * of one file to be typed.
67 /*ARGSUSED1*/ /* nbytes passed for regularity, maybe need later */
69 file_softmagic(struct magic_set *ms, const unsigned char *buf, size_t nbytes,
74 for (ml = ms->mlist->next; ml != ms->mlist; ml = ml->next)
75 if ((rv = match(ms, ml->magic, ml->nmagic, buf, nbytes, mode,
83 * Go through the whole list, stopping if you find a match. Process all
84 * the continuations of that match before returning.
86 * We support multi-level continuations:
88 * At any time when processing a successful top-level match, there is a
89 * current continuation level; it represents the level of the last
90 * successfully matched continuation.
92 * Continuations above that level are skipped as, if we see one, it
93 * means that the continuation that controls them - i.e, the
94 * lower-level continuation preceding them - failed to match.
96 * Continuations below that level are processed as, if we see one,
97 * it means we've finished processing or skipping higher-level
98 * continuations under the control of a successful or unsuccessful
99 * lower-level continuation, and are now seeing the next lower-level
100 * continuation and should process it. The current continuation
101 * level reverts to the level of the one we're seeing.
103 * Continuations at the current level are processed as, if we see
104 * one, there's no lower-level continuation that may have failed.
106 * If a continuation matches, we bump the current continuation level
107 * so that higher-level continuations are processed.
110 match(struct magic_set *ms, struct magic *magic, uint32_t nmagic,
111 const unsigned char *s, size_t nbytes, int mode, int text)
113 uint32_t magindex = 0;
114 unsigned int cont_level = 0;
115 int need_separator = 0;
116 int returnval = 0, e; /* if a match is found it is set to 1*/
117 int firstline = 1; /* a flag to print X\n X\n- X */
118 int printed_something = 0;
119 int print = (ms->flags & (MAGIC_MIME|MAGIC_APPLE)) == 0;
121 if (file_check_mem(ms, cont_level) == -1)
124 for (magindex = 0; magindex < nmagic; magindex++) {
126 struct magic *m = &magic[magindex];
128 if ((IS_STRING(m->type) &&
129 ((text && (m->str_flags & (STRING_BINTEST | STRING_TEXTTEST)) == STRING_BINTEST) ||
130 (!text && (m->str_flags & (STRING_TEXTTEST | STRING_BINTEST)) == STRING_TEXTTEST))) ||
131 (m->flag & mode) != mode) {
133 while (magic[magindex + 1].cont_level != 0 &&
136 continue; /* Skip to next top-level test*/
139 ms->offset = m->offset;
140 ms->line = m->lineno;
142 /* if main entry matches, print it... */
143 switch (mget(ms, s, m, nbytes, cont_level, text)) {
147 flush = m->reln != '!';
150 if (m->type == FILE_INDIRECT)
153 switch (magiccheck(ms, m)) {
167 * main entry didn't match,
168 * flush its continuations
170 while (magindex < nmagic - 1 &&
171 magic[magindex + 1].cont_level != 0)
176 if ((e = handle_annotation(ms, m)) != 0)
179 * If we are going to print something, we'll need to print
180 * a blank before we print something else.
184 printed_something = 1;
185 if (print_sep(ms, firstline) == -1)
190 if (print && mprint(ms, m) == -1)
193 ms->c.li[cont_level].off = moffset(ms, m);
195 /* and any continuations that match */
196 if (file_check_mem(ms, ++cont_level) == -1)
199 while (magic[magindex+1].cont_level != 0 &&
200 ++magindex < nmagic) {
201 m = &magic[magindex];
202 ms->line = m->lineno; /* for messages */
204 if (cont_level < m->cont_level)
206 if (cont_level > m->cont_level) {
208 * We're at the end of the level
209 * "cont_level" continuations.
211 cont_level = m->cont_level;
213 ms->offset = m->offset;
214 if (m->flag & OFFADD) {
216 ms->c.li[cont_level - 1].off;
219 #ifdef ENABLE_CONDITIONALS
220 if (m->cond == COND_ELSE ||
221 m->cond == COND_ELIF) {
222 if (ms->c.li[cont_level].last_match == 1)
226 switch (mget(ms, s, m, nbytes, cont_level, text)) {
235 if (m->type == FILE_INDIRECT)
241 switch (flush ? 1 : magiccheck(ms, m)) {
245 #ifdef ENABLE_CONDITIONALS
246 ms->c.li[cont_level].last_match = 0;
250 #ifdef ENABLE_CONDITIONALS
251 ms->c.li[cont_level].last_match = 1;
253 if (m->type != FILE_DEFAULT)
254 ms->c.li[cont_level].got_match = 1;
255 else if (ms->c.li[cont_level].got_match) {
256 ms->c.li[cont_level].got_match = 0;
259 if ((e = handle_annotation(ms, m)) != 0)
262 * If we are going to print something,
263 * make sure that we have a separator first.
266 if (!printed_something) {
267 printed_something = 1;
268 if (print_sep(ms, firstline)
274 * This continuation matched. Print
275 * its message, with a blank before it
276 * if the previous item printed and
277 * this item isn't empty.
279 /* space if previous printed */
281 && ((m->flag & NOSPACE) == 0)
284 file_printf(ms, " ") == -1)
288 if (print && mprint(ms, m) == -1)
291 ms->c.li[cont_level].off = moffset(ms, m);
297 * If we see any continuations
301 if (file_check_mem(ms, ++cont_level) == -1)
306 if (printed_something) {
311 if ((ms->flags & MAGIC_CONTINUE) == 0 && printed_something) {
312 return returnval; /* don't keep searching */
315 return returnval; /* This is hit if -k is set or there is no match */
319 check_fmt(struct magic_set *ms, struct magic *m)
324 if (strchr(m->desc, '%') == NULL)
327 rc = regcomp(&rx, "%[-0-9\\.]*s", REG_EXTENDED|REG_NOSUB);
330 (void)regerror(rc, &rx, errmsg, sizeof(errmsg));
331 file_magerror(ms, "regex error %d, (%s)", rc, errmsg);
334 rc = regexec(&rx, m->desc, 0, 0, 0);
341 char * strndup(const char *, size_t);
344 strndup(const char *str, size_t n)
349 for (len = 0; len < n && str[len]; len++)
351 if ((copy = malloc(len + 1)) == NULL)
353 (void)memcpy(copy, str, len);
357 #endif /* HAVE_STRNDUP */
360 mprint(struct magic_set *ms, struct magic *m)
367 union VALUETYPE *p = &ms->ms_value;
371 v = file_signextend(ms, m, (uint64_t)p->b);
372 switch (check_fmt(ms, m)) {
376 (void)snprintf(buf, sizeof(buf), "%c",
378 if (file_printf(ms, m->desc, buf) == -1)
382 if (file_printf(ms, m->desc, (unsigned char) v) == -1)
386 t = ms->offset + sizeof(char);
392 v = file_signextend(ms, m, (uint64_t)p->h);
393 switch (check_fmt(ms, m)) {
397 (void)snprintf(buf, sizeof(buf), "%hu",
399 if (file_printf(ms, m->desc, buf) == -1)
404 file_printf(ms, m->desc, (unsigned short) v) == -1)
408 t = ms->offset + sizeof(short);
415 v = file_signextend(ms, m, (uint64_t)p->l);
416 switch (check_fmt(ms, m)) {
420 (void)snprintf(buf, sizeof(buf), "%u", (uint32_t)v);
421 if (file_printf(ms, m->desc, buf) == -1)
425 if (file_printf(ms, m->desc, (uint32_t) v) == -1)
429 t = ms->offset + sizeof(int32_t);
435 v = file_signextend(ms, m, p->q);
436 if (file_printf(ms, m->desc, (uint64_t) v) == -1)
438 t = ms->offset + sizeof(int64_t);
443 case FILE_BESTRING16:
444 case FILE_LESTRING16:
445 if (m->reln == '=' || m->reln == '!') {
446 if (file_printf(ms, m->desc, m->value.s) == -1)
448 t = ms->offset + m->vallen;
451 if (*m->value.s == '\0')
452 p->s[strcspn(p->s, "\n")] = '\0';
453 if (file_printf(ms, m->desc, p->s) == -1)
455 t = ms->offset + strlen(p->s);
456 if (m->type == FILE_PSTRING)
457 t += file_pstring_length_size(m);
465 if (file_printf(ms, m->desc, file_fmttime(p->l, 1)) == -1)
467 t = ms->offset + sizeof(time_t);
474 if (file_printf(ms, m->desc, file_fmttime(p->l, 0)) == -1)
476 t = ms->offset + sizeof(time_t);
482 if (file_printf(ms, m->desc, file_fmttime((uint32_t)p->q,
485 t = ms->offset + sizeof(uint64_t);
491 if (file_printf(ms, m->desc, file_fmttime((uint32_t)p->q,
494 t = ms->offset + sizeof(uint64_t);
501 switch (check_fmt(ms, m)) {
505 (void)snprintf(buf, sizeof(buf), "%g", vf);
506 if (file_printf(ms, m->desc, buf) == -1)
510 if (file_printf(ms, m->desc, vf) == -1)
514 t = ms->offset + sizeof(float);
521 switch (check_fmt(ms, m)) {
525 (void)snprintf(buf, sizeof(buf), "%g", vd);
526 if (file_printf(ms, m->desc, buf) == -1)
530 if (file_printf(ms, m->desc, vd) == -1)
534 t = ms->offset + sizeof(double);
541 cp = strndup((const char *)ms->search.s, ms->search.rm_len);
543 file_oomem(ms, ms->search.rm_len);
546 rval = file_printf(ms, m->desc, cp);
552 if ((m->str_flags & REGEX_OFFSET_START))
553 t = ms->search.offset;
555 t = ms->search.offset + ms->search.rm_len;
560 if (file_printf(ms, m->desc, m->value.s) == -1)
562 if ((m->str_flags & REGEX_OFFSET_START))
563 t = ms->search.offset;
565 t = ms->search.offset + m->vallen;
569 if (file_printf(ms, m->desc, m->value.s) == -1)
579 file_magerror(ms, "invalid m->type (%d) in mprint()", m->type);
586 moffset(struct magic_set *ms, struct magic *m)
590 return CAST(int32_t, (ms->offset + sizeof(char)));
595 return CAST(int32_t, (ms->offset + sizeof(short)));
601 return CAST(int32_t, (ms->offset + sizeof(int32_t)));
606 return CAST(int32_t, (ms->offset + sizeof(int64_t)));
610 case FILE_BESTRING16:
611 case FILE_LESTRING16:
612 if (m->reln == '=' || m->reln == '!')
613 return ms->offset + m->vallen;
615 union VALUETYPE *p = &ms->ms_value;
618 if (*m->value.s == '\0')
619 p->s[strcspn(p->s, "\n")] = '\0';
620 t = CAST(uint32_t, (ms->offset + strlen(p->s)));
621 if (m->type == FILE_PSTRING)
622 t += file_pstring_length_size(m);
630 return CAST(int32_t, (ms->offset + sizeof(time_t)));
636 return CAST(int32_t, (ms->offset + sizeof(time_t)));
641 return CAST(int32_t, (ms->offset + sizeof(uint64_t)));
646 return CAST(int32_t, (ms->offset + sizeof(uint64_t)));
651 return CAST(int32_t, (ms->offset + sizeof(float)));
656 return CAST(int32_t, (ms->offset + sizeof(double)));
659 if ((m->str_flags & REGEX_OFFSET_START) != 0)
660 return CAST(int32_t, ms->search.offset);
662 return CAST(int32_t, (ms->search.offset +
666 if ((m->str_flags & REGEX_OFFSET_START) != 0)
667 return CAST(int32_t, ms->search.offset);
669 return CAST(int32_t, (ms->search.offset + m->vallen));
682 #define DO_CVT(fld, cast) \
684 switch (m->mask_op & FILE_OPS_MASK) { \
686 p->fld &= cast m->num_mask; \
689 p->fld |= cast m->num_mask; \
692 p->fld ^= cast m->num_mask; \
695 p->fld += cast m->num_mask; \
698 p->fld -= cast m->num_mask; \
700 case FILE_OPMULTIPLY: \
701 p->fld *= cast m->num_mask; \
703 case FILE_OPDIVIDE: \
704 p->fld /= cast m->num_mask; \
706 case FILE_OPMODULO: \
707 p->fld %= cast m->num_mask; \
710 if (m->mask_op & FILE_OPINVERSE) \
714 cvt_8(union VALUETYPE *p, const struct magic *m)
716 DO_CVT(b, (uint8_t));
720 cvt_16(union VALUETYPE *p, const struct magic *m)
722 DO_CVT(h, (uint16_t));
726 cvt_32(union VALUETYPE *p, const struct magic *m)
728 DO_CVT(l, (uint32_t));
732 cvt_64(union VALUETYPE *p, const struct magic *m)
734 DO_CVT(q, (uint64_t));
737 #define DO_CVT2(fld, cast) \
739 switch (m->mask_op & FILE_OPS_MASK) { \
741 p->fld += cast m->num_mask; \
744 p->fld -= cast m->num_mask; \
746 case FILE_OPMULTIPLY: \
747 p->fld *= cast m->num_mask; \
749 case FILE_OPDIVIDE: \
750 p->fld /= cast m->num_mask; \
755 cvt_float(union VALUETYPE *p, const struct magic *m)
761 cvt_double(union VALUETYPE *p, const struct magic *m)
763 DO_CVT2(d, (double));
767 * Convert the byte order of the data we are looking at
768 * While we're here, let's apply the mask operation
769 * (unless you have a better idea)
772 mconvert(struct magic_set *ms, struct magic *m)
774 union VALUETYPE *p = &ms->ms_value;
794 case FILE_BESTRING16:
795 case FILE_LESTRING16: {
796 /* Null terminate and eat *trailing* return */
797 p->s[sizeof(p->s) - 1] = '\0';
801 char *ptr1 = p->s, *ptr2 = ptr1 + file_pstring_length_size(m);
802 size_t len = file_pstring_get_length(m, ptr1);
803 if (len >= sizeof(p->s))
804 len = sizeof(p->s) - 1;
811 p->h = (short)((p->hs[0]<<8)|(p->hs[1]));
818 ((p->hl[0]<<24)|(p->hl[1]<<16)|(p->hl[2]<<8)|(p->hl[3]));
825 (((uint64_t)p->hq[0]<<56)|((uint64_t)p->hq[1]<<48)|
826 ((uint64_t)p->hq[2]<<40)|((uint64_t)p->hq[3]<<32)|
827 ((uint64_t)p->hq[4]<<24)|((uint64_t)p->hq[5]<<16)|
828 ((uint64_t)p->hq[6]<<8)|((uint64_t)p->hq[7]));
832 p->h = (short)((p->hs[1]<<8)|(p->hs[0]));
839 ((p->hl[3]<<24)|(p->hl[2]<<16)|(p->hl[1]<<8)|(p->hl[0]));
846 (((uint64_t)p->hq[7]<<56)|((uint64_t)p->hq[6]<<48)|
847 ((uint64_t)p->hq[5]<<40)|((uint64_t)p->hq[4]<<32)|
848 ((uint64_t)p->hq[3]<<24)|((uint64_t)p->hq[2]<<16)|
849 ((uint64_t)p->hq[1]<<8)|((uint64_t)p->hq[0]));
856 ((p->hl[1]<<24)|(p->hl[0]<<16)|(p->hl[3]<<8)|(p->hl[2]));
863 p->l = ((uint32_t)p->hl[0]<<24)|((uint32_t)p->hl[1]<<16)|
864 ((uint32_t)p->hl[2]<<8) |((uint32_t)p->hl[3]);
868 p->l = ((uint32_t)p->hl[3]<<24)|((uint32_t)p->hl[2]<<16)|
869 ((uint32_t)p->hl[1]<<8) |((uint32_t)p->hl[0]);
876 p->q = ((uint64_t)p->hq[0]<<56)|((uint64_t)p->hq[1]<<48)|
877 ((uint64_t)p->hq[2]<<40)|((uint64_t)p->hq[3]<<32)|
878 ((uint64_t)p->hq[4]<<24)|((uint64_t)p->hq[5]<<16)|
879 ((uint64_t)p->hq[6]<<8) |((uint64_t)p->hq[7]);
883 p->q = ((uint64_t)p->hq[7]<<56)|((uint64_t)p->hq[6]<<48)|
884 ((uint64_t)p->hq[5]<<40)|((uint64_t)p->hq[4]<<32)|
885 ((uint64_t)p->hq[3]<<24)|((uint64_t)p->hq[2]<<16)|
886 ((uint64_t)p->hq[1]<<8) |((uint64_t)p->hq[0]);
894 file_magerror(ms, "invalid type %d in mconvert()", m->type);
901 mdebug(uint32_t offset, const char *str, size_t len)
903 (void) fprintf(stderr, "mget @%d: ", offset);
904 file_showstr(stderr, str, len);
905 (void) fputc('\n', stderr);
906 (void) fputc('\n', stderr);
910 mcopy(struct magic_set *ms, union VALUETYPE *p, int type, int indir,
911 const unsigned char *s, uint32_t offset, size_t nbytes, size_t linecnt)
914 * Note: FILE_SEARCH and FILE_REGEX do not actually copy
915 * anything, but setup pointers into the source
920 ms->search.s = RCAST(const char *, s) + offset;
921 ms->search.s_len = nbytes - offset;
922 ms->search.offset = offset;
928 const char *last; /* end of search region */
929 const char *buf; /* start of search region */
934 ms->search.s_len = 0;
938 buf = RCAST(const char *, s) + offset;
939 end = last = RCAST(const char *, s) + nbytes;
940 /* mget() guarantees buf <= last */
941 for (lines = linecnt, b = buf; lines && b < end &&
942 ((b = CAST(const char *,
943 memchr(c = b, '\n', CAST(size_t, (end - b)))))
944 || (b = CAST(const char *,
945 memchr(c, '\r', CAST(size_t, (end - c))))));
948 if (b[0] == '\r' && b[1] == '\n')
952 last = RCAST(const char *, s) + nbytes;
955 ms->search.s_len = last - buf;
956 ms->search.offset = offset;
957 ms->search.rm_len = 0;
960 case FILE_BESTRING16:
961 case FILE_LESTRING16: {
962 const unsigned char *src = s + offset;
963 const unsigned char *esrc = s + nbytes;
965 char *edst = &p->s[sizeof(p->s) - 1];
967 if (type == FILE_BESTRING16)
970 /* check for pointer overflow */
972 file_magerror(ms, "invalid offset %u in mcopy()",
976 for (/*EMPTY*/; src < esrc; src += 2, dst++) {
982 if (type == FILE_BESTRING16 ?
991 case FILE_STRING: /* XXX - these two should not need */
992 case FILE_PSTRING: /* to copy anything, but do anyway. */
998 if (offset >= nbytes) {
999 (void)memset(p, '\0', sizeof(*p));
1002 if (nbytes - offset < sizeof(*p))
1003 nbytes = nbytes - offset;
1005 nbytes = sizeof(*p);
1007 (void)memcpy(p, s + offset, nbytes);
1010 * the usefulness of padding with zeroes eludes me, it
1011 * might even cause problems
1013 if (nbytes < sizeof(*p))
1014 (void)memset(((char *)(void *)p) + nbytes, '\0',
1015 sizeof(*p) - nbytes);
1020 mget(struct magic_set *ms, const unsigned char *s,
1021 struct magic *m, size_t nbytes, unsigned int cont_level, int text)
1023 uint32_t offset = ms->offset;
1024 uint32_t count = m->str_range;
1025 union VALUETYPE *p = &ms->ms_value;
1027 if (mcopy(ms, p, m->type, m->flag & INDIR, s, offset, nbytes, count) == -1)
1030 if ((ms->flags & MAGIC_DEBUG) != 0) {
1031 mdebug(offset, (char *)(void *)p, sizeof(union VALUETYPE));
1032 #ifndef COMPILE_ONLY
1037 if (m->flag & INDIR) {
1038 int off = m->in_offset;
1039 if (m->in_op & FILE_OPINDIRECT) {
1040 const union VALUETYPE *q = CAST(const union VALUETYPE *,
1041 ((const void *)(s + offset + off)));
1042 switch (m->in_type) {
1050 off = (short)((q->hs[0]<<8)|(q->hs[1]));
1053 off = (short)((q->hs[1]<<8)|(q->hs[0]));
1060 off = (int32_t)((q->hl[0]<<24)|(q->hl[1]<<16)|
1061 (q->hl[2]<<8)|(q->hl[3]));
1065 off = (int32_t)((q->hl[3]<<24)|(q->hl[2]<<16)|
1066 (q->hl[1]<<8)|(q->hl[0]));
1069 off = (int32_t)((q->hl[1]<<24)|(q->hl[0]<<16)|
1070 (q->hl[3]<<8)|(q->hl[2]));
1074 switch (m->in_type) {
1076 if (nbytes < (offset + 1))
1079 switch (m->in_op & FILE_OPS_MASK) {
1081 offset = p->b & off;
1084 offset = p->b | off;
1087 offset = p->b ^ off;
1090 offset = p->b + off;
1093 offset = p->b - off;
1095 case FILE_OPMULTIPLY:
1096 offset = p->b * off;
1099 offset = p->b / off;
1102 offset = p->b % off;
1107 if (m->in_op & FILE_OPINVERSE)
1111 if (nbytes < (offset + 2))
1114 switch (m->in_op & FILE_OPS_MASK) {
1116 offset = (short)((p->hs[0]<<8)|
1121 offset = (short)((p->hs[0]<<8)|
1126 offset = (short)((p->hs[0]<<8)|
1131 offset = (short)((p->hs[0]<<8)|
1136 offset = (short)((p->hs[0]<<8)|
1140 case FILE_OPMULTIPLY:
1141 offset = (short)((p->hs[0]<<8)|
1146 offset = (short)((p->hs[0]<<8)|
1151 offset = (short)((p->hs[0]<<8)|
1157 offset = (short)((p->hs[0]<<8)|
1159 if (m->in_op & FILE_OPINVERSE)
1163 if (nbytes < (offset + 2))
1166 switch (m->in_op & FILE_OPS_MASK) {
1168 offset = (short)((p->hs[1]<<8)|
1173 offset = (short)((p->hs[1]<<8)|
1178 offset = (short)((p->hs[1]<<8)|
1183 offset = (short)((p->hs[1]<<8)|
1188 offset = (short)((p->hs[1]<<8)|
1192 case FILE_OPMULTIPLY:
1193 offset = (short)((p->hs[1]<<8)|
1198 offset = (short)((p->hs[1]<<8)|
1203 offset = (short)((p->hs[1]<<8)|
1209 offset = (short)((p->hs[1]<<8)|
1211 if (m->in_op & FILE_OPINVERSE)
1215 if (nbytes < (offset + 2))
1218 switch (m->in_op & FILE_OPS_MASK) {
1220 offset = p->h & off;
1223 offset = p->h | off;
1226 offset = p->h ^ off;
1229 offset = p->h + off;
1232 offset = p->h - off;
1234 case FILE_OPMULTIPLY:
1235 offset = p->h * off;
1238 offset = p->h / off;
1241 offset = p->h % off;
1247 if (m->in_op & FILE_OPINVERSE)
1252 if (nbytes < (offset + 4))
1255 switch (m->in_op & FILE_OPS_MASK) {
1257 offset = (int32_t)((p->hl[0]<<24)|
1264 offset = (int32_t)((p->hl[0]<<24)|
1271 offset = (int32_t)((p->hl[0]<<24)|
1278 offset = (int32_t)((p->hl[0]<<24)|
1285 offset = (int32_t)((p->hl[0]<<24)|
1291 case FILE_OPMULTIPLY:
1292 offset = (int32_t)((p->hl[0]<<24)|
1299 offset = (int32_t)((p->hl[0]<<24)|
1306 offset = (int32_t)((p->hl[0]<<24)|
1314 offset = (int32_t)((p->hl[0]<<24)|
1318 if (m->in_op & FILE_OPINVERSE)
1323 if (nbytes < (offset + 4))
1326 switch (m->in_op & FILE_OPS_MASK) {
1328 offset = (int32_t)((p->hl[3]<<24)|
1335 offset = (int32_t)((p->hl[3]<<24)|
1342 offset = (int32_t)((p->hl[3]<<24)|
1349 offset = (int32_t)((p->hl[3]<<24)|
1356 offset = (int32_t)((p->hl[3]<<24)|
1362 case FILE_OPMULTIPLY:
1363 offset = (int32_t)((p->hl[3]<<24)|
1370 offset = (int32_t)((p->hl[3]<<24)|
1377 offset = (int32_t)((p->hl[3]<<24)|
1385 offset = (int32_t)((p->hl[3]<<24)|
1389 if (m->in_op & FILE_OPINVERSE)
1393 if (nbytes < (offset + 4))
1396 switch (m->in_op & FILE_OPS_MASK) {
1398 offset = (int32_t)((p->hl[1]<<24)|
1405 offset = (int32_t)((p->hl[1]<<24)|
1412 offset = (int32_t)((p->hl[1]<<24)|
1419 offset = (int32_t)((p->hl[1]<<24)|
1426 offset = (int32_t)((p->hl[1]<<24)|
1432 case FILE_OPMULTIPLY:
1433 offset = (int32_t)((p->hl[1]<<24)|
1440 offset = (int32_t)((p->hl[1]<<24)|
1447 offset = (int32_t)((p->hl[1]<<24)|
1455 offset = (int32_t)((p->hl[1]<<24)|
1459 if (m->in_op & FILE_OPINVERSE)
1463 if (nbytes < (offset + 4))
1466 switch (m->in_op & FILE_OPS_MASK) {
1468 offset = p->l & off;
1471 offset = p->l | off;
1474 offset = p->l ^ off;
1477 offset = p->l + off;
1480 offset = p->l - off;
1482 case FILE_OPMULTIPLY:
1483 offset = p->l * off;
1486 offset = p->l / off;
1489 offset = p->l % off;
1494 if (m->in_op & FILE_OPINVERSE)
1499 switch (m->in_type) {
1502 offset = ((((offset >> 0) & 0x7f) << 0) |
1503 (((offset >> 8) & 0x7f) << 7) |
1504 (((offset >> 16) & 0x7f) << 14) |
1505 (((offset >> 24) & 0x7f) << 21)) + 10;
1511 if (m->flag & INDIROFFADD) {
1512 offset += ms->c.li[cont_level-1].off;
1514 if (mcopy(ms, p, m->type, 0, s, offset, nbytes, count) == -1)
1516 ms->offset = offset;
1518 if ((ms->flags & MAGIC_DEBUG) != 0) {
1519 mdebug(offset, (char *)(void *)p,
1520 sizeof(union VALUETYPE));
1521 #ifndef COMPILE_ONLY
1527 /* Verify we have enough data to match magic type */
1530 if (nbytes < (offset + 1)) /* should alway be true */
1537 if (nbytes < (offset + 2))
1556 if (nbytes < (offset + 4))
1563 if (nbytes < (offset + 8))
1570 if (nbytes < (offset + m->vallen))
1575 if (nbytes < offset)
1580 if ((ms->flags & (MAGIC_MIME|MAGIC_APPLE)) == 0 &&
1581 file_printf(ms, "%s", m->desc) == -1)
1583 if (nbytes < offset)
1585 return file_softmagic(ms, s + offset, nbytes - offset,
1588 case FILE_DEFAULT: /* nothing to check */
1592 if (!mconvert(ms, m))
1598 file_strncmp(const char *s1, const char *s2, size_t len, uint32_t flags)
1601 * Convert the source args to unsigned here so that (1) the
1602 * compare will be unsigned as it is in strncmp() and (2) so
1603 * the ctype functions will work correctly without extra
1606 const unsigned char *a = (const unsigned char *)s1;
1607 const unsigned char *b = (const unsigned char *)s2;
1611 * What we want here is v = strncmp(s1, s2, len),
1612 * but ignoring any nulls.
1615 if (0L == flags) { /* normal string: do it fast */
1617 if ((v = *b++ - *a++) != '\0')
1620 else { /* combine the others */
1622 if ((flags & STRING_IGNORE_LOWERCASE) &&
1624 if ((v = tolower(*b++) - *a++) != '\0')
1627 else if ((flags & STRING_IGNORE_UPPERCASE) &&
1629 if ((v = toupper(*b++) - *a++) != '\0')
1632 else if ((flags & STRING_COMPACT_WHITESPACE) &&
1635 if (isspace(*b++)) {
1645 else if ((flags & STRING_COMPACT_OPTIONAL_WHITESPACE) &&
1652 if ((v = *b++ - *a++) != '\0')
1661 file_strncmp16(const char *a, const char *b, size_t len, uint32_t flags)
1664 * XXX - The 16-bit string compare probably needs to be done
1665 * differently, especially if the flags are to be supported.
1666 * At the moment, I am unsure.
1669 return file_strncmp(a, b, len, flags);
1673 magiccheck(struct magic_set *ms, struct magic *m)
1675 uint64_t l = m->value.q;
1680 union VALUETYPE *p = &ms->ms_value;
1748 file_magerror(ms, "cannot happen with float: invalid relation `%c'",
1782 file_magerror(ms, "cannot happen with double: invalid relation `%c'", m->reln);
1795 v = file_strncmp(m->value.s, p->s, (size_t)m->vallen, m->str_flags);
1798 case FILE_BESTRING16:
1799 case FILE_LESTRING16:
1801 v = file_strncmp16(m->value.s, p->s, (size_t)m->vallen, m->str_flags);
1804 case FILE_SEARCH: { /* search ms->search.s for the string m->value.s */
1808 if (ms->search.s == NULL)
1811 slen = MIN(m->vallen, sizeof(m->value.s));
1815 for (idx = 0; m->str_range == 0 || idx < m->str_range; idx++) {
1816 if (slen + idx > ms->search.s_len)
1819 v = file_strncmp(m->value.s, ms->search.s + idx, slen, m->str_flags);
1820 if (v == 0) { /* found match */
1821 ms->search.offset += idx;
1832 if (ms->search.s == NULL)
1836 rc = regcomp(&rx, m->value.s,
1837 REG_EXTENDED|REG_NEWLINE|
1838 ((m->str_flags & STRING_IGNORE_CASE) ? REG_ICASE : 0));
1840 (void)regerror(rc, &rx, errmsg, sizeof(errmsg));
1841 file_magerror(ms, "regex error %d, (%s)",
1846 regmatch_t pmatch[1];
1847 #ifndef REG_STARTEND
1848 #define REG_STARTEND 0
1849 size_t l = ms->search.s_len - 1;
1850 char c = ms->search.s[l];
1851 ((char *)(intptr_t)ms->search.s)[l] = '\0';
1853 pmatch[0].rm_so = 0;
1854 pmatch[0].rm_eo = ms->search.s_len;
1856 rc = regexec(&rx, (const char *)ms->search.s,
1857 1, pmatch, REG_STARTEND);
1858 #if REG_STARTEND == 0
1859 ((char *)(intptr_t)ms->search.s)[l] = c;
1863 ms->search.s += (int)pmatch[0].rm_so;
1864 ms->search.offset += (size_t)pmatch[0].rm_so;
1866 (size_t)(pmatch[0].rm_eo - pmatch[0].rm_so);
1875 (void)regerror(rc, &rx, errmsg, sizeof(errmsg));
1876 file_magerror(ms, "regexec error %d, (%s)",
1883 if (v == (uint64_t)-1)
1890 file_magerror(ms, "invalid type %d in magiccheck()", m->type);
1894 v = file_signextend(ms, m, v);
1898 if ((ms->flags & MAGIC_DEBUG) != 0)
1899 (void) fprintf(stderr, "%" INT64_T_FORMAT
1900 "u == *any* = 1\n", (unsigned long long)v);
1906 if ((ms->flags & MAGIC_DEBUG) != 0)
1907 (void) fprintf(stderr, "%" INT64_T_FORMAT "u != %"
1908 INT64_T_FORMAT "u = %d\n", (unsigned long long)v,
1909 (unsigned long long)l, matched);
1914 if ((ms->flags & MAGIC_DEBUG) != 0)
1915 (void) fprintf(stderr, "%" INT64_T_FORMAT "u == %"
1916 INT64_T_FORMAT "u = %d\n", (unsigned long long)v,
1917 (unsigned long long)l, matched);
1921 if (m->flag & UNSIGNED) {
1923 if ((ms->flags & MAGIC_DEBUG) != 0)
1924 (void) fprintf(stderr, "%" INT64_T_FORMAT
1925 "u > %" INT64_T_FORMAT "u = %d\n",
1926 (unsigned long long)v,
1927 (unsigned long long)l, matched);
1930 matched = (int64_t) v > (int64_t) l;
1931 if ((ms->flags & MAGIC_DEBUG) != 0)
1932 (void) fprintf(stderr, "%" INT64_T_FORMAT
1933 "d > %" INT64_T_FORMAT "d = %d\n",
1934 (long long)v, (long long)l, matched);
1939 if (m->flag & UNSIGNED) {
1941 if ((ms->flags & MAGIC_DEBUG) != 0)
1942 (void) fprintf(stderr, "%" INT64_T_FORMAT
1943 "u < %" INT64_T_FORMAT "u = %d\n",
1944 (unsigned long long)v,
1945 (unsigned long long)l, matched);
1948 matched = (int64_t) v < (int64_t) l;
1949 if ((ms->flags & MAGIC_DEBUG) != 0)
1950 (void) fprintf(stderr, "%" INT64_T_FORMAT
1951 "d < %" INT64_T_FORMAT "d = %d\n",
1952 (long long)v, (long long)l, matched);
1957 matched = (v & l) == l;
1958 if ((ms->flags & MAGIC_DEBUG) != 0)
1959 (void) fprintf(stderr, "((%" INT64_T_FORMAT "x & %"
1960 INT64_T_FORMAT "x) == %" INT64_T_FORMAT
1961 "x) = %d\n", (unsigned long long)v,
1962 (unsigned long long)l, (unsigned long long)l,
1967 matched = (v & l) != l;
1968 if ((ms->flags & MAGIC_DEBUG) != 0)
1969 (void) fprintf(stderr, "((%" INT64_T_FORMAT "x & %"
1970 INT64_T_FORMAT "x) != %" INT64_T_FORMAT
1971 "x) = %d\n", (unsigned long long)v,
1972 (unsigned long long)l, (unsigned long long)l,
1978 file_magerror(ms, "cannot happen: invalid relation `%c'",
1987 handle_annotation(struct magic_set *ms, struct magic *m)
1989 if (ms->flags & MAGIC_APPLE) {
1990 if (file_printf(ms, "%.8s", m->apple) == -1)
1994 if ((ms->flags & MAGIC_MIME_TYPE) && m->mimetype[0]) {
1995 if (file_printf(ms, "%s", m->mimetype) == -1)
2003 print_sep(struct magic_set *ms, int firstline)
2005 if (ms->flags & MAGIC_MIME)
2010 * we found another match
2011 * put a newline and '-' to do some simple formatting
2013 return file_printf(ms, "\n- ");