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-rw-r--r--src/softmagic.c2506
1 files changed, 2506 insertions, 0 deletions
diff --git a/src/softmagic.c b/src/softmagic.c
new file mode 100644
index 0000000..e0e839f
--- /dev/null
+++ b/src/softmagic.c
@@ -0,0 +1,2506 @@
+/*
+ * Copyright (c) Ian F. Darwin 1986-1995.
+ * Software written by Ian F. Darwin and others;
+ * maintained 1995-present by Christos Zoulas and others.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice immediately at the beginning of the file, without modification,
+ * this list of conditions, and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+/*
+ * softmagic - interpret variable magic from MAGIC
+ */
+
+#include "file.h"
+
+#ifndef lint
+FILE_RCSID("@(#)$File: softmagic.c,v 1.339 2022/12/26 17:31:14 christos Exp $")
+#endif /* lint */
+
+#include "magic.h"
+#include <assert.h>
+#include <math.h>
+#include <string.h>
+#include <ctype.h>
+#include <stdlib.h>
+#include <time.h>
+#include "der.h"
+
+file_private int match(struct magic_set *, struct magic *, file_regex_t **, size_t,
+ const struct buffer *, size_t, int, int, int, uint16_t *,
+ uint16_t *, int *, int *, int *, int *, int *);
+file_private int mget(struct magic_set *, struct magic *, const struct buffer *,
+ const unsigned char *, size_t,
+ size_t, unsigned int, int, int, int, uint16_t *,
+ uint16_t *, int *, int *, int *, int *, int *);
+file_private int msetoffset(struct magic_set *, struct magic *, struct buffer *,
+ const struct buffer *, size_t, unsigned int);
+file_private int magiccheck(struct magic_set *, struct magic *, file_regex_t **);
+file_private int mprint(struct magic_set *, struct magic *);
+file_private int moffset(struct magic_set *, struct magic *, const struct buffer *,
+ int32_t *);
+file_private void mdebug(uint32_t, const char *, size_t);
+file_private int mcopy(struct magic_set *, union VALUETYPE *, int, int,
+ const unsigned char *, uint32_t, size_t, struct magic *);
+file_private int mconvert(struct magic_set *, struct magic *, int);
+file_private int print_sep(struct magic_set *, int);
+file_private int handle_annotation(struct magic_set *, struct magic *, int);
+file_private int cvt_8(union VALUETYPE *, const struct magic *);
+file_private int cvt_16(union VALUETYPE *, const struct magic *);
+file_private int cvt_32(union VALUETYPE *, const struct magic *);
+file_private int cvt_64(union VALUETYPE *, const struct magic *);
+
+#define OFFSET_OOB(n, o, i) ((n) < CAST(uint32_t, (o)) || (i) > ((n) - (o)))
+#define BE64(p) ( \
+ (CAST(uint64_t, (p)->hq[0])<<56)| \
+ (CAST(uint64_t, (p)->hq[1])<<48)| \
+ (CAST(uint64_t, (p)->hq[2])<<40)| \
+ (CAST(uint64_t, (p)->hq[3])<<32)| \
+ (CAST(uint64_t, (p)->hq[4])<<24)| \
+ (CAST(uint64_t, (p)->hq[5])<<16)| \
+ (CAST(uint64_t, (p)->hq[6])<<8)| \
+ (CAST(uint64_t, (p)->hq[7])))
+#define LE64(p) ( \
+ (CAST(uint64_t, (p)->hq[7])<<56)| \
+ (CAST(uint64_t, (p)->hq[6])<<48)| \
+ (CAST(uint64_t, (p)->hq[5])<<40)| \
+ (CAST(uint64_t, (p)->hq[4])<<32)| \
+ (CAST(uint64_t, (p)->hq[3])<<24)| \
+ (CAST(uint64_t, (p)->hq[2])<<16)| \
+ (CAST(uint64_t, (p)->hq[1])<<8)| \
+ (CAST(uint64_t, (p)->hq[0])))
+#define LE32(p) ( \
+ (CAST(uint32_t, (p)->hl[3])<<24)| \
+ (CAST(uint32_t, (p)->hl[2])<<16)| \
+ (CAST(uint32_t, (p)->hl[1])<<8)| \
+ (CAST(uint32_t, (p)->hl[0])))
+#define BE32(p) ( \
+ (CAST(uint32_t, (p)->hl[0])<<24)| \
+ (CAST(uint32_t, (p)->hl[1])<<16)| \
+ (CAST(uint32_t, (p)->hl[2])<<8)| \
+ (CAST(uint32_t, (p)->hl[3])))
+#define ME32(p) ( \
+ (CAST(uint32_t, (p)->hl[1])<<24)| \
+ (CAST(uint32_t, (p)->hl[0])<<16)| \
+ (CAST(uint32_t, (p)->hl[3])<<8)| \
+ (CAST(uint32_t, (p)->hl[2])))
+
+#define BE16(p) ((CAST(uint16_t, (p)->hs[0])<<8)|(CAST(uint16_t, (p)->hs[1])))
+#define LE16(p) ((CAST(uint16_t, (p)->hs[1])<<8)|(CAST(uint16_t, (p)->hs[0])))
+#define SEXT(s,v,p) ((s) ? \
+ CAST(intmax_t, CAST(int##v##_t, p)) : \
+ CAST(intmax_t, CAST(uint##v##_t, p)))
+
+/*
+ * softmagic - lookup one file in parsed, in-memory copy of database
+ * Passed the name and FILE * of one file to be typed.
+ */
+/*ARGSUSED1*/ /* nbytes passed for regularity, maybe need later */
+file_protected int
+file_softmagic(struct magic_set *ms, const struct buffer *b,
+ uint16_t *indir_count, uint16_t *name_count, int mode, int text)
+{
+ struct mlist *ml;
+ int rv = 0, printed_something = 0, need_separator = 0, firstline = 1;
+ uint16_t nc, ic;
+
+ if (name_count == NULL) {
+ nc = 0;
+ name_count = &nc;
+ }
+ if (indir_count == NULL) {
+ ic = 0;
+ indir_count = &ic;
+ }
+
+ for (ml = ms->mlist[0]->next; ml != ms->mlist[0]; ml = ml->next) {
+ int ret = match(ms, ml->magic, ml->magic_rxcomp, ml->nmagic, b,
+ 0, mode, text, 0, indir_count, name_count,
+ &printed_something, &need_separator, &firstline,
+ NULL, NULL);
+ switch (ret) {
+ case -1:
+ return ret;
+ case 0:
+ continue;
+ default:
+ if ((ms->flags & MAGIC_CONTINUE) == 0)
+ return ret;
+ rv = ret;
+ break;
+ }
+ }
+
+ return rv;
+}
+
+#define FILE_FMTDEBUG
+#ifdef FILE_FMTDEBUG
+#define F(a, b, c) file_fmtcheck((a), (b), (c), __FILE__, __LINE__)
+
+file_private const char * __attribute__((__format_arg__(3)))
+file_fmtcheck(struct magic_set *ms, const char *desc, const char *def,
+ const char *file, size_t line)
+{
+ const char *ptr;
+
+ if (strchr(desc, '%') == NULL)
+ return desc;
+
+ ptr = fmtcheck(desc, def);
+ if (ptr == def)
+ file_magerror(ms,
+ "%s, %" SIZE_T_FORMAT "u: format `%s' does not match"
+ " with `%s'", file, line, desc, def);
+ return ptr;
+}
+#else
+#define F(a, b, c) fmtcheck((b), (c))
+#endif
+
+/*
+ * Go through the whole list, stopping if you find a match. Process all
+ * the continuations of that match before returning.
+ *
+ * We support multi-level continuations:
+ *
+ * At any time when processing a successful top-level match, there is a
+ * current continuation level; it represents the level of the last
+ * successfully matched continuation.
+ *
+ * Continuations above that level are skipped as, if we see one, it
+ * means that the continuation that controls them - i.e, the
+ * lower-level continuation preceding them - failed to match.
+ *
+ * Continuations below that level are processed as, if we see one,
+ * it means we've finished processing or skipping higher-level
+ * continuations under the control of a successful or unsuccessful
+ * lower-level continuation, and are now seeing the next lower-level
+ * continuation and should process it. The current continuation
+ * level reverts to the level of the one we're seeing.
+ *
+ * Continuations at the current level are processed as, if we see
+ * one, there's no lower-level continuation that may have failed.
+ *
+ * If a continuation matches, we bump the current continuation level
+ * so that higher-level continuations are processed.
+ */
+file_private int
+match(struct magic_set *ms, struct magic *magic, file_regex_t **magic_rxcomp,
+ size_t nmagic, const struct buffer *b, size_t offset, int mode, int text,
+ int flip, uint16_t *indir_count, uint16_t *name_count,
+ int *printed_something, int *need_separator, int *firstline,
+ int *returnval, int *found_match)
+{
+ uint32_t magindex = 0;
+ unsigned int cont_level = 0;
+ int found_matchv = 0; /* if a match is found it is set to 1*/
+ int returnvalv = 0, e;
+ struct buffer bb;
+ int print = (ms->flags & MAGIC_NODESC) == 0;
+
+ /*
+ * returnval can be 0 if a match is found, but there was no
+ * annotation to be printed.
+ */
+ if (returnval == NULL)
+ returnval = &returnvalv;
+ if (found_match == NULL)
+ found_match = &found_matchv;
+
+ if (file_check_mem(ms, cont_level) == -1)
+ return -1;
+
+ for (magindex = 0; magindex < nmagic; magindex++) {
+ int flush = 0;
+ struct magic *m = &magic[magindex];
+ file_regex_t **m_rxcomp = &magic_rxcomp[magindex];
+
+ if (m->type != FILE_NAME)
+ if ((IS_STRING(m->type) &&
+#define FLT (STRING_BINTEST | STRING_TEXTTEST)
+ ((text && (m->str_flags & FLT) == STRING_BINTEST) ||
+ (!text && (m->str_flags & FLT) == STRING_TEXTTEST))) ||
+ (m->flag & mode) != mode) {
+flush:
+ /* Skip sub-tests */
+ while (magindex < nmagic - 1 &&
+ magic[magindex + 1].cont_level != 0)
+ magindex++;
+ cont_level = 0;
+ continue; /* Skip to next top-level test*/
+ }
+
+ if (msetoffset(ms, m, &bb, b, offset, cont_level) == -1)
+ goto flush;
+ ms->line = m->lineno;
+
+ /* if main entry matches, print it... */
+ switch (mget(ms, m, b, CAST(const unsigned char *, bb.fbuf),
+ bb.flen, offset, cont_level,
+ mode, text, flip, indir_count, name_count,
+ printed_something, need_separator, firstline, returnval,
+ found_match))
+ {
+ case -1:
+ return -1;
+ case 0:
+ flush = m->reln != '!';
+ break;
+ default:
+ if (m->type == FILE_INDIRECT) {
+ *found_match = 1;
+ *returnval = 1;
+ }
+
+ switch (magiccheck(ms, m, m_rxcomp)) {
+ case -1:
+ return -1;
+ case 0:
+ flush++;
+ break;
+ default:
+ flush = 0;
+ break;
+ }
+ break;
+ }
+ if (flush) {
+ /*
+ * main entry didn't match,
+ * flush its continuations
+ */
+ goto flush;
+ }
+
+ if ((e = handle_annotation(ms, m, *firstline)) != 0)
+ {
+ *found_match = 1;
+ *need_separator = 1;
+ *printed_something = 1;
+ *returnval = 1;
+ return e;
+ }
+
+ /*
+ * If we are going to print something, we'll need to print
+ * a blank before we print something else.
+ */
+ if (*m->desc) {
+ *found_match = 1;
+ if (print) {
+ *returnval = 1;
+ *need_separator = 1;
+ *printed_something = 1;
+ if (print_sep(ms, *firstline) == -1)
+ return -1;
+ if (mprint(ms, m) == -1)
+ return -1;
+ }
+ }
+
+ switch (moffset(ms, m, &bb, &ms->c.li[cont_level].off)) {
+ case -1:
+ case 0:
+ goto flush;
+ default:
+ break;
+ }
+
+ /* and any continuations that match */
+ if (file_check_mem(ms, ++cont_level) == -1)
+ return -1;
+
+ while (magindex + 1 < nmagic &&
+ magic[magindex + 1].cont_level != 0) {
+ m = &magic[++magindex];
+ m_rxcomp = &magic_rxcomp[magindex];
+ ms->line = m->lineno; /* for messages */
+
+ if (cont_level < m->cont_level)
+ continue;
+ if (cont_level > m->cont_level) {
+ /*
+ * We're at the end of the level
+ * "cont_level" continuations.
+ */
+ cont_level = m->cont_level;
+ }
+ if (msetoffset(ms, m, &bb, b, offset, cont_level) == -1)
+ goto flush;
+ if (m->flag & OFFADD) {
+ if (cont_level == 0) {
+ if ((ms->flags & MAGIC_DEBUG) != 0)
+ fprintf(stderr,
+ "direct *zero*"
+ " cont_level\n");
+ return 0;
+ }
+ ms->offset +=
+ ms->c.li[cont_level - 1].off;
+ }
+
+#ifdef ENABLE_CONDITIONALS
+ if (m->cond == COND_ELSE ||
+ m->cond == COND_ELIF) {
+ if (ms->c.li[cont_level].last_match == 1)
+ continue;
+ }
+#endif
+ switch (mget(ms, m, b, CAST(const unsigned char *,
+ bb.fbuf), bb.flen, offset,
+ cont_level, mode, text, flip, indir_count,
+ name_count, printed_something, need_separator,
+ firstline, returnval, found_match)) {
+ case -1:
+ return -1;
+ case 0:
+ if (m->reln != '!')
+ continue;
+ flush = 1;
+ break;
+ default:
+ if (m->type == FILE_INDIRECT) {
+ *found_match = 1;
+ *returnval = 1;
+ }
+ flush = 0;
+ break;
+ }
+
+ switch (flush ? 1 : magiccheck(ms, m, m_rxcomp)) {
+ case -1:
+ return -1;
+ case 0:
+#ifdef ENABLE_CONDITIONALS
+ ms->c.li[cont_level].last_match = 0;
+#endif
+ break;
+ default:
+#ifdef ENABLE_CONDITIONALS
+ ms->c.li[cont_level].last_match = 1;
+#endif
+ if (m->type == FILE_CLEAR)
+ ms->c.li[cont_level].got_match = 0;
+ else if (ms->c.li[cont_level].got_match) {
+ if (m->type == FILE_DEFAULT)
+ break;
+ } else
+ ms->c.li[cont_level].got_match = 1;
+
+ if ((e = handle_annotation(ms, m, *firstline))
+ != 0) {
+ *found_match = 1;
+ *need_separator = 1;
+ *printed_something = 1;
+ *returnval = 1;
+ return e;
+ }
+ if (*m->desc) {
+ *found_match = 1;
+ }
+ if (print && *m->desc) {
+ *returnval = 1;
+ /*
+ * This continuation matched. Print
+ * its message, with a blank before it
+ * if the previous item printed and
+ * this item isn't empty.
+ */
+ /*
+ * If we are going to print something,
+ * make sure that we have a separator
+ * first.
+ */
+ if (!*printed_something) {
+ *printed_something = 1;
+ if (print_sep(ms, *firstline)
+ == -1)
+ return -1;
+ }
+ /* space if previous printed */
+ if (*need_separator
+ && (m->flag & NOSPACE) == 0) {
+ if (file_printf(ms, " ") == -1)
+ return -1;
+ }
+ if (mprint(ms, m) == -1)
+ return -1;
+ *need_separator = 1;
+ }
+
+ switch (moffset(ms, m, &bb,
+ &ms->c.li[cont_level].off)) {
+ case -1:
+ case 0:
+ cont_level--;
+ break;
+ default:
+ break;
+ }
+
+ /*
+ * If we see any continuations
+ * at a higher level,
+ * process them.
+ */
+ if (file_check_mem(ms, ++cont_level) == -1)
+ return -1;
+ break;
+ }
+ }
+ if (*printed_something) {
+ *firstline = 0;
+ }
+ if (*found_match) {
+ if ((ms->flags & MAGIC_CONTINUE) == 0)
+ return *returnval;
+ // So that we print a separator
+ *printed_something = 0;
+ *firstline = 0;
+ }
+ cont_level = 0;
+ }
+ return *returnval;
+}
+
+file_private int
+check_fmt(struct magic_set *ms, const char *fmt)
+{
+ file_regex_t rx;
+ int rc, rv = -1;
+ const char* pat = "%[-0-9\\.]*s";
+
+ if (strchr(fmt, '%') == NULL)
+ return 0;
+
+ rc = file_regcomp(ms, &rx, pat, REG_EXTENDED|REG_NOSUB);
+ if (rc == 0) {
+ rc = file_regexec(ms, &rx, fmt, 0, 0, 0);
+ rv = !rc;
+ }
+ file_regfree(&rx);
+ return rv;
+}
+
+#if !defined(HAVE_STRNDUP) || defined(__aiws__) || defined(_AIX)
+# if defined(__aiws__) || defined(_AIX)
+# define strndup aix_strndup /* aix is broken */
+# endif
+char *strndup(const char *, size_t);
+
+char *
+strndup(const char *str, size_t n)
+{
+ size_t len;
+ char *copy;
+
+ for (len = 0; len < n && str[len]; len++)
+ continue;
+ if ((copy = CAST(char *, malloc(len + 1))) == NULL)
+ return NULL;
+ (void)memcpy(copy, str, len);
+ copy[len] = '\0';
+ return copy;
+}
+#endif /* HAVE_STRNDUP */
+
+static int
+varexpand(struct magic_set *ms, char *buf, size_t len, const char *str)
+{
+ const char *ptr, *sptr, *e, *t, *ee, *et;
+ size_t l;
+
+ for (sptr = str; (ptr = strstr(sptr, "${")) != NULL;) {
+ l = CAST(size_t, ptr - sptr);
+ if (l >= len)
+ return -1;
+ memcpy(buf, sptr, l);
+ buf += l;
+ len -= l;
+ ptr += 2;
+ if (!*ptr || ptr[1] != '?')
+ return -1;
+ for (et = t = ptr + 2; *et && *et != ':'; et++)
+ continue;
+ if (*et != ':')
+ return -1;
+ for (ee = e = et + 1; *ee && *ee != '}'; ee++)
+ continue;
+ if (*ee != '}')
+ return -1;
+ switch (*ptr) {
+ case 'x':
+ if (ms->mode & 0111) {
+ ptr = t;
+ l = et - t;
+ } else {
+ ptr = e;
+ l = ee - e;
+ }
+ break;
+ default:
+ return -1;
+ }
+ if (l >= len)
+ return -1;
+ memcpy(buf, ptr, l);
+ buf += l;
+ len -= l;
+ sptr = ee + 1;
+ }
+
+ l = strlen(sptr);
+ if (l >= len)
+ return -1;
+
+ memcpy(buf, sptr, l);
+ buf[l] = '\0';
+ return 0;
+}
+
+
+file_private int
+mprint(struct magic_set *ms, struct magic *m)
+{
+ uint64_t v;
+ float vf;
+ double vd;
+ char buf[128], tbuf[26], sbuf[512], ebuf[512];
+ const char *desc;
+ union VALUETYPE *p = &ms->ms_value;
+
+ if (varexpand(ms, ebuf, sizeof(ebuf), m->desc) == -1)
+ desc = m->desc;
+ else
+ desc = ebuf;
+
+#define PRINTER(value, format, stype, utype) \
+ v = file_signextend(ms, m, CAST(uint64_t, value)); \
+ switch (check_fmt(ms, desc)) { \
+ case -1: \
+ return -1; \
+ case 1: \
+ if (m->flag & UNSIGNED) { \
+ (void)snprintf(buf, sizeof(buf), "%" format "u", \
+ CAST(utype, v)); \
+ } else { \
+ (void)snprintf(buf, sizeof(buf), "%" format "d", \
+ CAST(stype, v)); \
+ } \
+ if (file_printf(ms, F(ms, desc, "%s"), buf) == -1) \
+ return -1; \
+ break; \
+ default: \
+ if (m->flag & UNSIGNED) { \
+ if (file_printf(ms, F(ms, desc, "%" format "u"), \
+ CAST(utype, v)) == -1) \
+ return -1; \
+ } else { \
+ if (file_printf(ms, F(ms, desc, "%" format "d"), \
+ CAST(stype, v)) == -1) \
+ return -1; \
+ } \
+ break; \
+ } \
+ break
+
+ switch (m->type) {
+ case FILE_BYTE:
+ PRINTER(p->b, "", int8_t, uint8_t);
+
+ case FILE_SHORT:
+ case FILE_BESHORT:
+ case FILE_LESHORT:
+ PRINTER(p->h, "", int16_t, uint16_t);
+
+ case FILE_LONG:
+ case FILE_BELONG:
+ case FILE_LELONG:
+ case FILE_MELONG:
+ PRINTER(p->l, "", int32_t, uint32_t);
+
+ case FILE_QUAD:
+ case FILE_BEQUAD:
+ case FILE_LEQUAD:
+ case FILE_OFFSET:
+ PRINTER(p->q, INT64_T_FORMAT, long long, unsigned long long);
+
+ case FILE_STRING:
+ case FILE_PSTRING:
+ case FILE_BESTRING16:
+ case FILE_LESTRING16:
+ if (m->reln == '=' || m->reln == '!') {
+ if (file_printf(ms, F(ms, desc, "%s"),
+ file_printable(ms, sbuf, sizeof(sbuf), m->value.s,
+ sizeof(m->value.s))) == -1)
+ return -1;
+ }
+ else {
+ char *str = p->s;
+
+ /* compute t before we mangle the string? */
+
+ if (*m->value.s == '\0')
+ str[strcspn(str, "\r\n")] = '\0';
+
+ if (m->str_flags & STRING_TRIM)
+ str = file_strtrim(str);
+
+ if (file_printf(ms, F(ms, desc, "%s"),
+ file_printable(ms, sbuf, sizeof(sbuf), str,
+ sizeof(p->s) - (str - p->s))) == -1)
+ return -1;
+
+ if (m->type == FILE_PSTRING) {
+ size_t l = file_pstring_length_size(ms, m);
+ if (l == FILE_BADSIZE)
+ return -1;
+ }
+ }
+ break;
+
+ case FILE_DATE:
+ case FILE_BEDATE:
+ case FILE_LEDATE:
+ case FILE_MEDATE:
+ if (file_printf(ms, F(ms, desc, "%s"),
+ file_fmtdatetime(tbuf, sizeof(tbuf), p->l, 0)) == -1)
+ return -1;
+ break;
+
+ case FILE_LDATE:
+ case FILE_BELDATE:
+ case FILE_LELDATE:
+ case FILE_MELDATE:
+ if (file_printf(ms, F(ms, desc, "%s"),
+ file_fmtdatetime(tbuf, sizeof(tbuf), p->l, FILE_T_LOCAL))
+ == -1)
+ return -1;
+ break;
+
+ case FILE_QDATE:
+ case FILE_BEQDATE:
+ case FILE_LEQDATE:
+ if (file_printf(ms, F(ms, desc, "%s"),
+ file_fmtdatetime(tbuf, sizeof(tbuf), p->q, 0)) == -1)
+ return -1;
+ break;
+
+ case FILE_QLDATE:
+ case FILE_BEQLDATE:
+ case FILE_LEQLDATE:
+ if (file_printf(ms, F(ms, desc, "%s"),
+ file_fmtdatetime(tbuf, sizeof(tbuf), p->q, FILE_T_LOCAL)) == -1)
+ return -1;
+ break;
+
+ case FILE_QWDATE:
+ case FILE_BEQWDATE:
+ case FILE_LEQWDATE:
+ if (file_printf(ms, F(ms, desc, "%s"),
+ file_fmtdatetime(tbuf, sizeof(tbuf), p->q, FILE_T_WINDOWS))
+ == -1)
+ return -1;
+ break;
+
+ case FILE_FLOAT:
+ case FILE_BEFLOAT:
+ case FILE_LEFLOAT:
+ vf = p->f;
+ switch (check_fmt(ms, desc)) {
+ case -1:
+ return -1;
+ case 1:
+ (void)snprintf(buf, sizeof(buf), "%g", vf);
+ if (file_printf(ms, F(ms, desc, "%s"), buf) == -1)
+ return -1;
+ break;
+ default:
+ if (file_printf(ms, F(ms, desc, "%g"), vf) == -1)
+ return -1;
+ break;
+ }
+ break;
+
+ case FILE_DOUBLE:
+ case FILE_BEDOUBLE:
+ case FILE_LEDOUBLE:
+ vd = p->d;
+ switch (check_fmt(ms, desc)) {
+ case -1:
+ return -1;
+ case 1:
+ (void)snprintf(buf, sizeof(buf), "%g", vd);
+ if (file_printf(ms, F(ms, desc, "%s"), buf) == -1)
+ return -1;
+ break;
+ default:
+ if (file_printf(ms, F(ms, desc, "%g"), vd) == -1)
+ return -1;
+ break;
+ }
+ break;
+
+ case FILE_SEARCH:
+ case FILE_REGEX: {
+ char *cp, *scp;
+ int rval;
+
+ cp = strndup(RCAST(const char *, ms->search.s),
+ ms->search.rm_len);
+ if (cp == NULL) {
+ file_oomem(ms, ms->search.rm_len);
+ return -1;
+ }
+ scp = (m->str_flags & STRING_TRIM) ? file_strtrim(cp) : cp;
+
+ rval = file_printf(ms, F(ms, desc, "%s"), file_printable(ms,
+ sbuf, sizeof(sbuf), scp, ms->search.rm_len));
+ free(cp);
+
+ if (rval == -1)
+ return -1;
+ break;
+ }
+
+ case FILE_DEFAULT:
+ case FILE_CLEAR:
+ if (file_printf(ms, "%s", m->desc) == -1)
+ return -1;
+ break;
+
+ case FILE_INDIRECT:
+ case FILE_USE:
+ case FILE_NAME:
+ break;
+ case FILE_DER:
+ if (file_printf(ms, F(ms, desc, "%s"),
+ file_printable(ms, sbuf, sizeof(sbuf), ms->ms_value.s,
+ sizeof(ms->ms_value.s))) == -1)
+ return -1;
+ break;
+ case FILE_GUID:
+ (void) file_print_guid(buf, sizeof(buf), ms->ms_value.guid);
+ if (file_printf(ms, F(ms, desc, "%s"), buf) == -1)
+ return -1;
+ break;
+ case FILE_MSDOSDATE:
+ case FILE_BEMSDOSDATE:
+ case FILE_LEMSDOSDATE:
+ if (file_printf(ms, F(ms, desc, "%s"),
+ file_fmtdate(tbuf, sizeof(tbuf), p->h)) == -1)
+ return -1;
+ break;
+ case FILE_MSDOSTIME:
+ case FILE_BEMSDOSTIME:
+ case FILE_LEMSDOSTIME:
+ if (file_printf(ms, F(ms, desc, "%s"),
+ file_fmttime(tbuf, sizeof(tbuf), p->h)) == -1)
+ return -1;
+ break;
+ case FILE_OCTAL:
+ file_fmtnum(buf, sizeof(buf), m->value.s, 8);
+ if (file_printf(ms, F(ms, desc, "%s"), buf) == -1)
+ return -1;
+ break;
+ default:
+ file_magerror(ms, "invalid m->type (%d) in mprint()", m->type);
+ return -1;
+ }
+ return 0;
+}
+
+file_private int
+moffset(struct magic_set *ms, struct magic *m, const struct buffer *b,
+ int32_t *op)
+{
+ size_t nbytes = b->flen;
+ int32_t o;
+
+ switch (m->type) {
+ case FILE_BYTE:
+ o = CAST(int32_t, (ms->offset + sizeof(char)));
+ break;
+
+ case FILE_SHORT:
+ case FILE_BESHORT:
+ case FILE_LESHORT:
+ case FILE_MSDOSDATE:
+ case FILE_LEMSDOSDATE:
+ case FILE_BEMSDOSDATE:
+ case FILE_MSDOSTIME:
+ case FILE_LEMSDOSTIME:
+ case FILE_BEMSDOSTIME:
+ o = CAST(int32_t, (ms->offset + sizeof(short)));
+ break;
+
+ case FILE_LONG:
+ case FILE_BELONG:
+ case FILE_LELONG:
+ case FILE_MELONG:
+ o = CAST(int32_t, (ms->offset + sizeof(int32_t)));
+ break;
+
+ case FILE_QUAD:
+ case FILE_BEQUAD:
+ case FILE_LEQUAD:
+ o = CAST(int32_t, (ms->offset + sizeof(int64_t)));
+ break;
+
+ case FILE_STRING:
+ case FILE_PSTRING:
+ case FILE_BESTRING16:
+ case FILE_LESTRING16:
+ case FILE_OCTAL:
+ if (m->reln == '=' || m->reln == '!') {
+ o = ms->offset + m->vallen;
+ } else {
+ union VALUETYPE *p = &ms->ms_value;
+
+ if (*m->value.s == '\0')
+ p->s[strcspn(p->s, "\r\n")] = '\0';
+ o = CAST(uint32_t, (ms->offset + strlen(p->s)));
+ if (m->type == FILE_PSTRING) {
+ size_t l = file_pstring_length_size(ms, m);
+ if (l == FILE_BADSIZE)
+ return -1;
+ o += CAST(uint32_t, l);
+ }
+ }
+ break;
+
+ case FILE_DATE:
+ case FILE_BEDATE:
+ case FILE_LEDATE:
+ case FILE_MEDATE:
+ o = CAST(int32_t, (ms->offset + sizeof(uint32_t)));
+ break;
+
+ case FILE_LDATE:
+ case FILE_BELDATE:
+ case FILE_LELDATE:
+ case FILE_MELDATE:
+ o = CAST(int32_t, (ms->offset + sizeof(uint32_t)));
+ break;
+
+ case FILE_QDATE:
+ case FILE_BEQDATE:
+ case FILE_LEQDATE:
+ o = CAST(int32_t, (ms->offset + sizeof(uint64_t)));
+ break;
+
+ case FILE_QLDATE:
+ case FILE_BEQLDATE:
+ case FILE_LEQLDATE:
+ o = CAST(int32_t, (ms->offset + sizeof(uint64_t)));
+ break;
+
+ case FILE_FLOAT:
+ case FILE_BEFLOAT:
+ case FILE_LEFLOAT:
+ o = CAST(int32_t, (ms->offset + sizeof(float)));
+ break;
+
+ case FILE_DOUBLE:
+ case FILE_BEDOUBLE:
+ case FILE_LEDOUBLE:
+ o = CAST(int32_t, (ms->offset + sizeof(double)));
+ break;
+
+ case FILE_REGEX:
+ if ((m->str_flags & REGEX_OFFSET_START) != 0)
+ o = CAST(int32_t, ms->search.offset);
+ else
+ o = CAST(int32_t,
+ (ms->search.offset + ms->search.rm_len));
+ break;
+
+ case FILE_SEARCH:
+ if ((m->str_flags & REGEX_OFFSET_START) != 0)
+ o = CAST(int32_t, ms->search.offset);
+ else
+ o = CAST(int32_t, (ms->search.offset + m->vallen));
+ break;
+
+ case FILE_CLEAR:
+ case FILE_DEFAULT:
+ case FILE_INDIRECT:
+ case FILE_OFFSET:
+ case FILE_USE:
+ o = ms->offset;
+ break;
+
+ case FILE_DER:
+ o = der_offs(ms, m, nbytes);
+ if (o == -1 || CAST(size_t, o) > nbytes) {
+ if ((ms->flags & MAGIC_DEBUG) != 0) {
+ (void)fprintf(stderr,
+ "Bad DER offset %d nbytes=%"
+ SIZE_T_FORMAT "u", o, nbytes);
+ }
+ *op = 0;
+ return 0;
+ }
+ break;
+
+ case FILE_GUID:
+ o = CAST(int32_t, (ms->offset + 2 * sizeof(uint64_t)));
+ break;
+
+ default:
+ o = 0;
+ break;
+ }
+
+ if (CAST(size_t, o) > nbytes) {
+#if 0
+ file_error(ms, 0, "Offset out of range %" SIZE_T_FORMAT
+ "u > %" SIZE_T_FORMAT "u", (size_t)o, nbytes);
+#endif
+ return -1;
+ }
+ *op = o;
+ return 1;
+}
+
+file_private uint32_t
+cvt_id3(struct magic_set *ms, uint32_t v)
+{
+ v = ((((v >> 0) & 0x7f) << 0) |
+ (((v >> 8) & 0x7f) << 7) |
+ (((v >> 16) & 0x7f) << 14) |
+ (((v >> 24) & 0x7f) << 21));
+ if ((ms->flags & MAGIC_DEBUG) != 0)
+ fprintf(stderr, "id3 offs=%u\n", v);
+ return v;
+}
+
+file_private int
+cvt_flip(int type, int flip)
+{
+ if (flip == 0)
+ return type;
+ switch (type) {
+ case FILE_BESHORT:
+ return FILE_LESHORT;
+ case FILE_BELONG:
+ return FILE_LELONG;
+ case FILE_BEDATE:
+ return FILE_LEDATE;
+ case FILE_BELDATE:
+ return FILE_LELDATE;
+ case FILE_BEQUAD:
+ return FILE_LEQUAD;
+ case FILE_BEQDATE:
+ return FILE_LEQDATE;
+ case FILE_BEQLDATE:
+ return FILE_LEQLDATE;
+ case FILE_BEQWDATE:
+ return FILE_LEQWDATE;
+ case FILE_LESHORT:
+ return FILE_BESHORT;
+ case FILE_LELONG:
+ return FILE_BELONG;
+ case FILE_LEDATE:
+ return FILE_BEDATE;
+ case FILE_LELDATE:
+ return FILE_BELDATE;
+ case FILE_LEQUAD:
+ return FILE_BEQUAD;
+ case FILE_LEQDATE:
+ return FILE_BEQDATE;
+ case FILE_LEQLDATE:
+ return FILE_BEQLDATE;
+ case FILE_LEQWDATE:
+ return FILE_BEQWDATE;
+ case FILE_BEFLOAT:
+ return FILE_LEFLOAT;
+ case FILE_LEFLOAT:
+ return FILE_BEFLOAT;
+ case FILE_BEDOUBLE:
+ return FILE_LEDOUBLE;
+ case FILE_LEDOUBLE:
+ return FILE_BEDOUBLE;
+ default:
+ return type;
+ }
+}
+#define DO_CVT(fld, type) \
+ if (m->num_mask) \
+ switch (m->mask_op & FILE_OPS_MASK) { \
+ case FILE_OPAND: \
+ p->fld &= CAST(type, m->num_mask); \
+ break; \
+ case FILE_OPOR: \
+ p->fld |= CAST(type, m->num_mask); \
+ break; \
+ case FILE_OPXOR: \
+ p->fld ^= CAST(type, m->num_mask); \
+ break; \
+ case FILE_OPADD: \
+ p->fld += CAST(type, m->num_mask); \
+ break; \
+ case FILE_OPMINUS: \
+ p->fld -= CAST(type, m->num_mask); \
+ break; \
+ case FILE_OPMULTIPLY: \
+ p->fld *= CAST(type, m->num_mask); \
+ break; \
+ case FILE_OPDIVIDE: \
+ if (CAST(type, m->num_mask) == 0) \
+ return -1; \
+ p->fld /= CAST(type, m->num_mask); \
+ break; \
+ case FILE_OPMODULO: \
+ if (CAST(type, m->num_mask) == 0) \
+ return -1; \
+ p->fld %= CAST(type, m->num_mask); \
+ break; \
+ } \
+ if (m->mask_op & FILE_OPINVERSE) \
+ p->fld = ~p->fld \
+
+file_private int
+cvt_8(union VALUETYPE *p, const struct magic *m)
+{
+ DO_CVT(b, uint8_t);
+ return 0;
+}
+
+file_private int
+cvt_16(union VALUETYPE *p, const struct magic *m)
+{
+ DO_CVT(h, uint16_t);
+ return 0;
+}
+
+file_private int
+cvt_32(union VALUETYPE *p, const struct magic *m)
+{
+ DO_CVT(l, uint32_t);
+ return 0;
+}
+
+file_private int
+cvt_64(union VALUETYPE *p, const struct magic *m)
+{
+ DO_CVT(q, uint64_t);
+ return 0;
+}
+
+#define DO_CVT2(fld, type) \
+ if (m->num_mask) \
+ switch (m->mask_op & FILE_OPS_MASK) { \
+ case FILE_OPADD: \
+ p->fld += CAST(type, m->num_mask); \
+ break; \
+ case FILE_OPMINUS: \
+ p->fld -= CAST(type, m->num_mask); \
+ break; \
+ case FILE_OPMULTIPLY: \
+ p->fld *= CAST(type, m->num_mask); \
+ break; \
+ case FILE_OPDIVIDE: \
+ if (CAST(type, m->num_mask) == 0) \
+ return -1; \
+ p->fld /= CAST(type, m->num_mask); \
+ break; \
+ } \
+
+file_private int
+cvt_float(union VALUETYPE *p, const struct magic *m)
+{
+ DO_CVT2(f, float);
+ return 0;
+}
+
+file_private int
+cvt_double(union VALUETYPE *p, const struct magic *m)
+{
+ DO_CVT2(d, double);
+ return 0;
+}
+
+/*
+ * Convert the byte order of the data we are looking at
+ * While we're here, let's apply the mask operation
+ * (unless you have a better idea)
+ */
+file_private int
+mconvert(struct magic_set *ms, struct magic *m, int flip)
+{
+ union VALUETYPE *p = &ms->ms_value;
+
+ switch (cvt_flip(m->type, flip)) {
+ case FILE_BYTE:
+ if (cvt_8(p, m) == -1)
+ goto out;
+ return 1;
+ case FILE_SHORT:
+ case FILE_MSDOSDATE:
+ case FILE_LEMSDOSDATE:
+ case FILE_BEMSDOSDATE:
+ case FILE_MSDOSTIME:
+ case FILE_LEMSDOSTIME:
+ case FILE_BEMSDOSTIME:
+ if (cvt_16(p, m) == -1)
+ goto out;
+ return 1;
+ case FILE_LONG:
+ case FILE_DATE:
+ case FILE_LDATE:
+ if (cvt_32(p, m) == -1)
+ goto out;
+ return 1;
+ case FILE_QUAD:
+ case FILE_QDATE:
+ case FILE_QLDATE:
+ case FILE_QWDATE:
+ case FILE_OFFSET:
+ if (cvt_64(p, m) == -1)
+ goto out;
+ return 1;
+ case FILE_STRING:
+ case FILE_BESTRING16:
+ case FILE_LESTRING16:
+ case FILE_OCTAL: {
+ /* Null terminate and eat *trailing* return */
+ p->s[sizeof(p->s) - 1] = '\0';
+ return 1;
+ }
+ case FILE_PSTRING: {
+ char *ptr1, *ptr2;
+ size_t len, sz = file_pstring_length_size(ms, m);
+ if (sz == FILE_BADSIZE)
+ return 0;
+ ptr1 = p->s;
+ ptr2 = ptr1 + sz;
+ len = file_pstring_get_length(ms, m, ptr1);
+ if (len == FILE_BADSIZE)
+ return 0;
+ sz = sizeof(p->s) - sz; /* maximum length of string */
+ if (len >= sz) {
+ /*
+ * The size of the pascal string length (sz)
+ * is 1, 2, or 4. We need at least 1 byte for NUL
+ * termination, but we've already truncated the
+ * string by p->s, so we need to deduct sz.
+ * Because we can use one of the bytes of the length
+ * after we shifted as NUL termination.
+ */
+ len = sz;
+ }
+ while (len--)
+ *ptr1++ = *ptr2++;
+ *ptr1 = '\0';
+ return 1;
+ }
+ case FILE_BESHORT:
+ p->h = CAST(short, BE16(p));
+ if (cvt_16(p, m) == -1)
+ goto out;
+ return 1;
+ case FILE_BELONG:
+ case FILE_BEDATE:
+ case FILE_BELDATE:
+ p->l = CAST(int32_t, BE32(p));
+ if (cvt_32(p, m) == -1)
+ goto out;
+ return 1;
+ case FILE_BEQUAD:
+ case FILE_BEQDATE:
+ case FILE_BEQLDATE:
+ case FILE_BEQWDATE:
+ p->q = CAST(uint64_t, BE64(p));
+ if (cvt_64(p, m) == -1)
+ goto out;
+ return 1;
+ case FILE_LESHORT:
+ p->h = CAST(short, LE16(p));
+ if (cvt_16(p, m) == -1)
+ goto out;
+ return 1;
+ case FILE_LELONG:
+ case FILE_LEDATE:
+ case FILE_LELDATE:
+ p->l = CAST(int32_t, LE32(p));
+ if (cvt_32(p, m) == -1)
+ goto out;
+ return 1;
+ case FILE_LEQUAD:
+ case FILE_LEQDATE:
+ case FILE_LEQLDATE:
+ case FILE_LEQWDATE:
+ p->q = CAST(uint64_t, LE64(p));
+ if (cvt_64(p, m) == -1)
+ goto out;
+ return 1;
+ case FILE_MELONG:
+ case FILE_MEDATE:
+ case FILE_MELDATE:
+ p->l = CAST(int32_t, ME32(p));
+ if (cvt_32(p, m) == -1)
+ goto out;
+ return 1;
+ case FILE_FLOAT:
+ if (cvt_float(p, m) == -1)
+ goto out;
+ return 1;
+ case FILE_BEFLOAT:
+ p->l = BE32(p);
+ if (cvt_float(p, m) == -1)
+ goto out;
+ return 1;
+ case FILE_LEFLOAT:
+ p->l = LE32(p);
+ if (cvt_float(p, m) == -1)
+ goto out;
+ return 1;
+ case FILE_DOUBLE:
+ if (cvt_double(p, m) == -1)
+ goto out;
+ return 1;
+ case FILE_BEDOUBLE:
+ p->q = BE64(p);
+ if (cvt_double(p, m) == -1)
+ goto out;
+ return 1;
+ case FILE_LEDOUBLE:
+ p->q = LE64(p);
+ if (cvt_double(p, m) == -1)
+ goto out;
+ return 1;
+ case FILE_REGEX:
+ case FILE_SEARCH:
+ case FILE_DEFAULT:
+ case FILE_CLEAR:
+ case FILE_NAME:
+ case FILE_USE:
+ case FILE_DER:
+ case FILE_GUID:
+ return 1;
+ default:
+ file_magerror(ms, "invalid type %d in mconvert()", m->type);
+ return 0;
+ }
+out:
+ file_magerror(ms, "zerodivide in mconvert()");
+ return 0;
+}
+
+
+file_private void
+mdebug(uint32_t offset, const char *str, size_t len)
+{
+ (void) fprintf(stderr, "mget/%" SIZE_T_FORMAT "u @%d: ", len, offset);
+ file_showstr(stderr, str, len);
+ (void) fputc('\n', stderr);
+ (void) fputc('\n', stderr);
+}
+
+file_private int
+mcopy(struct magic_set *ms, union VALUETYPE *p, int type, int indir,
+ const unsigned char *s, uint32_t offset, size_t nbytes, struct magic *m)
+{
+ size_t size = sizeof(*p);
+ /*
+ * Note: FILE_SEARCH and FILE_REGEX do not actually copy
+ * anything, but setup pointers into the source
+ */
+ if (indir == 0) {
+ switch (type) {
+ case FILE_DER:
+ case FILE_SEARCH:
+ if (offset > nbytes)
+ offset = CAST(uint32_t, nbytes);
+ ms->search.s = RCAST(const char *, s) + offset;
+ ms->search.s_len = nbytes - offset;
+ ms->search.offset = offset;
+ return 0;
+
+ case FILE_REGEX: {
+ const char *b;
+ const char *c;
+ const char *last; /* end of search region */
+ const char *buf; /* start of search region */
+ const char *end;
+ size_t lines, linecnt, bytecnt;
+
+ if (s == NULL || nbytes < offset) {
+ ms->search.s_len = 0;
+ ms->search.s = NULL;
+ return 0;
+ }
+
+ if (m->str_flags & REGEX_LINE_COUNT) {
+ linecnt = m->str_range;
+ bytecnt = linecnt * 80;
+ } else {
+ linecnt = 0;
+ bytecnt = m->str_range;
+ }
+
+ if (bytecnt == 0 || bytecnt > nbytes - offset)
+ bytecnt = nbytes - offset;
+ if (bytecnt > ms->regex_max)
+ bytecnt = ms->regex_max;
+
+ buf = RCAST(const char *, s) + offset;
+ end = last = RCAST(const char *, s) + bytecnt + offset;
+ /* mget() guarantees buf <= last */
+ for (lines = linecnt, b = buf; lines && b < end &&
+ ((b = CAST(const char *,
+ memchr(c = b, '\n', CAST(size_t, (end - b)))))
+ || (b = CAST(const char *,
+ memchr(c, '\r', CAST(size_t, (end - c))))));
+ lines--, b++) {
+ if (b < end - 1 && b[0] == '\r' && b[1] == '\n')
+ b++;
+ if (b < end - 1 && b[0] == '\n')
+ b++;
+ last = b;
+ }
+ if (lines)
+ last = end;
+
+ ms->search.s = buf;
+ ms->search.s_len = last - buf;
+ ms->search.offset = offset;
+ ms->search.rm_len = 0;
+ return 0;
+ }
+ case FILE_BESTRING16:
+ case FILE_LESTRING16: {
+ const unsigned char *src = s + offset;
+ const unsigned char *esrc = s + nbytes;
+ char *dst = p->s;
+ char *edst = &p->s[sizeof(p->s) - 1];
+
+ if (type == FILE_BESTRING16)
+ src++;
+
+ /* check that offset is within range */
+ if (offset >= nbytes)
+ break;
+ for (/*EMPTY*/; src < esrc; src += 2, dst++) {
+ if (dst < edst)
+ *dst = *src;
+ else
+ break;
+ if (*dst == '\0') {
+ if (type == FILE_BESTRING16 ?
+ *(src - 1) != '\0' :
+ ((src + 1 < esrc) &&
+ *(src + 1) != '\0'))
+ *dst = ' ';
+ }
+ }
+ *edst = '\0';
+ return 0;
+ }
+ case FILE_STRING: /* XXX - these two should not need */
+ case FILE_PSTRING: /* to copy anything, but do anyway. */
+ if (m->str_range != 0 && m->str_range < sizeof(*p))
+ size = m->str_range;
+ break;
+ default:
+ break;
+ }
+ }
+
+ if (type == FILE_OFFSET) {
+ (void)memset(p, '\0', sizeof(*p));
+ p->q = offset;
+ return 0;
+ }
+
+ if (offset >= nbytes) {
+ (void)memset(p, '\0', sizeof(*p));
+ return 0;
+ }
+ if (nbytes - offset < size)
+ nbytes = nbytes - offset;
+ else
+ nbytes = size;
+
+ (void)memcpy(p, s + offset, nbytes);
+
+ /*
+ * the usefulness of padding with zeroes eludes me, it
+ * might even cause problems
+ */
+ if (nbytes < sizeof(*p))
+ (void)memset(RCAST(char *, RCAST(void *, p)) + nbytes, '\0',
+ sizeof(*p) - nbytes);
+ return 0;
+}
+
+file_private int
+do_ops(struct magic *m, uint32_t *rv, intmax_t lhs, intmax_t off)
+{
+ intmax_t offset;
+ // On purpose not INTMAX_MAX
+ if (lhs >= UINT_MAX || lhs <= INT_MIN ||
+ off >= UINT_MAX || off <= INT_MIN) {
+ fprintf(stderr, "lhs/off overflow %jd %jd\n", lhs, off);
+ return 1;
+ }
+
+ if (off) {
+ switch (m->in_op & FILE_OPS_MASK) {
+ case FILE_OPAND:
+ offset = lhs & off;
+ break;
+ case FILE_OPOR:
+ offset = lhs | off;
+ break;
+ case FILE_OPXOR:
+ offset = lhs ^ off;
+ break;
+ case FILE_OPADD:
+ offset = lhs + off;
+ break;
+ case FILE_OPMINUS:
+ offset = lhs - off;
+ break;
+ case FILE_OPMULTIPLY:
+ offset = lhs * off;
+ break;
+ case FILE_OPDIVIDE:
+ offset = lhs / off;
+ break;
+ case FILE_OPMODULO:
+ offset = lhs % off;
+ break;
+ }
+ } else
+ offset = lhs;
+ if (m->in_op & FILE_OPINVERSE)
+ offset = ~offset;
+ if (offset >= UINT_MAX) {
+ fprintf(stderr, "offset overflow %jd\n", offset);
+ return 1;
+ }
+ *rv = CAST(uint32_t, offset);
+ return 0;
+}
+
+file_private int
+msetoffset(struct magic_set *ms, struct magic *m, struct buffer *bb,
+ const struct buffer *b, size_t o, unsigned int cont_level)
+{
+ int32_t offset;
+ if (m->flag & OFFNEGATIVE) {
+ offset = -m->offset;
+ if (cont_level > 0) {
+ if (m->flag & (OFFADD|INDIROFFADD))
+ goto normal;
+#if 0
+ file_error(ms, 0, "negative offset %d at continuation"
+ "level %u", m->offset, cont_level);
+ return -1;
+#endif
+ }
+ if (buffer_fill(b) == -1)
+ return -1;
+ if (o != 0) {
+ // Not yet!
+ file_magerror(ms, "non zero offset %" SIZE_T_FORMAT
+ "u at level %u", o, cont_level);
+ return -1;
+ }
+ if (CAST(size_t, m->offset) > b->elen)
+ return -1;
+ buffer_init(bb, -1, NULL, b->ebuf, b->elen);
+ ms->eoffset = ms->offset = CAST(int32_t, b->elen - m->offset);
+ } else {
+ offset = m->offset;
+ if (cont_level == 0) {
+normal:
+ // XXX: Pass real fd, then who frees bb?
+ buffer_init(bb, -1, NULL, b->fbuf, b->flen);
+ ms->offset = offset;
+ ms->eoffset = 0;
+ } else {
+ ms->offset = ms->eoffset + offset;
+ }
+ }
+ if ((ms->flags & MAGIC_DEBUG) != 0) {
+ fprintf(stderr, "bb=[%p,%" SIZE_T_FORMAT "u,%"
+ SIZE_T_FORMAT "u], %d [b=%p,%"
+ SIZE_T_FORMAT "u,%" SIZE_T_FORMAT "u], [o=%#x, c=%d]\n",
+ bb->fbuf, bb->flen, bb->elen, ms->offset, b->fbuf,
+ b->flen, b->elen, offset, cont_level);
+ }
+ return 0;
+}
+
+file_private int
+save_cont(struct magic_set *ms, struct cont *c)
+{
+ size_t len;
+ *c = ms->c;
+ len = c->len * sizeof(*c->li);
+ ms->c.li = CAST(struct level_info *, malloc(len));
+ if (ms->c.li == NULL) {
+ ms->c = *c;
+ return -1;
+ }
+ memcpy(ms->c.li, c->li, len);
+ return 0;
+}
+
+file_private void
+restore_cont(struct magic_set *ms, struct cont *c)
+{
+ free(ms->c.li);
+ ms->c = *c;
+}
+
+file_private int
+mget(struct magic_set *ms, struct magic *m, const struct buffer *b,
+ const unsigned char *s, size_t nbytes, size_t o, unsigned int cont_level,
+ int mode, int text, int flip, uint16_t *indir_count, uint16_t *name_count,
+ int *printed_something, int *need_separator, int *firstline, int *returnval,
+ int *found_match)
+{
+ uint32_t eoffset, offset = ms->offset;
+ struct buffer bb;
+ intmax_t lhs;
+ file_pushbuf_t *pb;
+ int rv, oneed_separator, in_type, nfound_match;
+ char *rbuf;
+ union VALUETYPE *p = &ms->ms_value;
+ struct mlist ml, *mlp;
+ struct cont c;
+
+ if (*indir_count >= ms->indir_max) {
+ file_error(ms, 0, "indirect count (%hu) exceeded",
+ *indir_count);
+ return -1;
+ }
+
+ if (*name_count >= ms->name_max) {
+ file_error(ms, 0, "name use count (%hu) exceeded",
+ *name_count);
+ return -1;
+ }
+
+
+
+ if (mcopy(ms, p, m->type, m->flag & INDIR, s,
+ CAST(uint32_t, offset + o), CAST(uint32_t, nbytes), m) == -1)
+ return -1;
+
+ if ((ms->flags & MAGIC_DEBUG) != 0) {
+ fprintf(stderr, "mget(type=%d, flag=%#x, offset=%u, o=%"
+ SIZE_T_FORMAT "u, " "nbytes=%" SIZE_T_FORMAT
+ "u, il=%hu, nc=%hu)\n",
+ m->type, m->flag, offset, o, nbytes,
+ *indir_count, *name_count);
+ mdebug(offset, RCAST(char *, RCAST(void *, p)),
+ sizeof(union VALUETYPE));
+#ifndef COMPILE_ONLY
+ file_mdump(m);
+#endif
+ }
+
+ if (m->flag & INDIR) {
+ intmax_t off = m->in_offset;
+ const int sgn = m->in_op & FILE_OPSIGNED;
+ if (m->in_op & FILE_OPINDIRECT) {
+ const union VALUETYPE *q = CAST(const union VALUETYPE *,
+ RCAST(const void *, s + offset + off));
+ int op;
+ switch (op = cvt_flip(m->in_type, flip)) {
+ case FILE_BYTE:
+ if (OFFSET_OOB(nbytes, offset + off, 1))
+ return 0;
+ off = SEXT(sgn,8,q->b);
+ break;
+ case FILE_SHORT:
+ if (OFFSET_OOB(nbytes, offset + off, 2))
+ return 0;
+ off = SEXT(sgn,16,q->h);
+ break;
+ case FILE_BESHORT:
+ if (OFFSET_OOB(nbytes, offset + off, 2))
+ return 0;
+ off = SEXT(sgn,16,BE16(q));
+ break;
+ case FILE_LESHORT:
+ if (OFFSET_OOB(nbytes, offset + off, 2))
+ return 0;
+ off = SEXT(sgn,16,LE16(q));
+ break;
+ case FILE_LONG:
+ if (OFFSET_OOB(nbytes, offset + off, 4))
+ return 0;
+ off = SEXT(sgn,32,q->l);
+ break;
+ case FILE_BELONG:
+ case FILE_BEID3:
+ if (OFFSET_OOB(nbytes, offset + off, 4))
+ return 0;
+ off = SEXT(sgn,32,BE32(q));
+ break;
+ case FILE_LEID3:
+ case FILE_LELONG:
+ if (OFFSET_OOB(nbytes, offset + off, 4))
+ return 0;
+ off = SEXT(sgn,32,LE32(q));
+ break;
+ case FILE_MELONG:
+ if (OFFSET_OOB(nbytes, offset + off, 4))
+ return 0;
+ off = SEXT(sgn,32,ME32(q));
+ break;
+ case FILE_BEQUAD:
+ if (OFFSET_OOB(nbytes, offset + off, 8))
+ return 0;
+ off = SEXT(sgn,64,BE64(q));
+ break;
+ case FILE_LEQUAD:
+ if (OFFSET_OOB(nbytes, offset + off, 8))
+ return 0;
+ off = SEXT(sgn,64,LE64(q));
+ break;
+ case FILE_OCTAL:
+ if (OFFSET_OOB(nbytes, offset, m->vallen))
+ return 0;
+ off = SEXT(sgn,64,strtoull(p->s, NULL, 8));
+ break;
+ default:
+ if ((ms->flags & MAGIC_DEBUG) != 0)
+ fprintf(stderr, "bad op=%d\n", op);
+ return 0;
+ }
+ if ((ms->flags & MAGIC_DEBUG) != 0)
+ fprintf(stderr, "indirect offs=%jd\n", off);
+ }
+ switch (in_type = cvt_flip(m->in_type, flip)) {
+ case FILE_BYTE:
+ if (OFFSET_OOB(nbytes, offset, 1))
+ return 0;
+ if (do_ops(m, &offset, SEXT(sgn,8,p->b), off))
+ return 0;
+ break;
+ case FILE_BESHORT:
+ if (OFFSET_OOB(nbytes, offset, 2))
+ return 0;
+ if (do_ops(m, &offset, SEXT(sgn,16,BE16(p)), off))
+ return 0;
+ break;
+ case FILE_LESHORT:
+ if (OFFSET_OOB(nbytes, offset, 2))
+ return 0;
+ if (do_ops(m, &offset, SEXT(sgn,16,LE16(p)), off))
+ return 0;
+ break;
+ case FILE_SHORT:
+ if (OFFSET_OOB(nbytes, offset, 2))
+ return 0;
+ if (do_ops(m, &offset, SEXT(sgn,16,p->h), off))
+ return 0;
+ break;
+ case FILE_BELONG:
+ case FILE_BEID3:
+ if (OFFSET_OOB(nbytes, offset, 4))
+ return 0;
+ lhs = BE32(p);
+ if (in_type == FILE_BEID3)
+ lhs = cvt_id3(ms, CAST(uint32_t, lhs));
+ if (do_ops(m, &offset, SEXT(sgn,32,lhs), off))
+ return 0;
+ break;
+ case FILE_LELONG:
+ case FILE_LEID3:
+ if (OFFSET_OOB(nbytes, offset, 4))
+ return 0;
+ lhs = LE32(p);
+ if (in_type == FILE_LEID3)
+ lhs = cvt_id3(ms, CAST(uint32_t, lhs));
+ if (do_ops(m, &offset, SEXT(sgn,32,lhs), off))
+ return 0;
+ break;
+ case FILE_MELONG:
+ if (OFFSET_OOB(nbytes, offset, 4))
+ return 0;
+ if (do_ops(m, &offset, SEXT(sgn,32,ME32(p)), off))
+ return 0;
+ break;
+ case FILE_LONG:
+ if (OFFSET_OOB(nbytes, offset, 4))
+ return 0;
+ if (do_ops(m, &offset, SEXT(sgn,32,p->l), off))
+ return 0;
+ break;
+ case FILE_LEQUAD:
+ if (OFFSET_OOB(nbytes, offset, 8))
+ return 0;
+ if (do_ops(m, &offset, SEXT(sgn,64,LE64(p)), off))
+ return 0;
+ break;
+ case FILE_BEQUAD:
+ if (OFFSET_OOB(nbytes, offset, 8))
+ return 0;
+ if (do_ops(m, &offset, SEXT(sgn,64,BE64(p)), off))
+ return 0;
+ break;
+ case FILE_OCTAL:
+ if (OFFSET_OOB(nbytes, offset, m->vallen))
+ return 0;
+ if(do_ops(m, &offset,
+ SEXT(sgn,64,strtoull(p->s, NULL, 8)), off))
+ return 0;
+ break;
+ default:
+ if ((ms->flags & MAGIC_DEBUG) != 0)
+ fprintf(stderr, "bad in_type=%d\n", in_type);
+ return 0;
+ }
+
+ if (m->flag & INDIROFFADD) {
+ if (cont_level == 0) {
+ if ((ms->flags & MAGIC_DEBUG) != 0)
+ fprintf(stderr,
+ "indirect *zero* cont_level\n");
+ return 0;
+ }
+ offset += ms->c.li[cont_level - 1].off;
+ if (offset == 0) {
+ if ((ms->flags & MAGIC_DEBUG) != 0)
+ fprintf(stderr,
+ "indirect *zero* offset\n");
+ return 0;
+ }
+ if ((ms->flags & MAGIC_DEBUG) != 0)
+ fprintf(stderr, "indirect +offs=%u\n", offset);
+ }
+ if (mcopy(ms, p, m->type, 0, s, offset, nbytes, m) == -1)
+ return -1;
+ ms->offset = offset;
+
+ if ((ms->flags & MAGIC_DEBUG) != 0) {
+ mdebug(offset, RCAST(char *, RCAST(void *, p)),
+ sizeof(union VALUETYPE));
+#ifndef COMPILE_ONLY
+ file_mdump(m);
+#endif
+ }
+ }
+
+ /* Verify we have enough data to match magic type */
+ switch (m->type) {
+ case FILE_BYTE:
+ if (OFFSET_OOB(nbytes, offset, 1))
+ return 0;
+ break;
+
+ case FILE_SHORT:
+ case FILE_BESHORT:
+ case FILE_LESHORT:
+ if (OFFSET_OOB(nbytes, offset, 2))
+ return 0;
+ break;
+
+ case FILE_LONG:
+ case FILE_BELONG:
+ case FILE_LELONG:
+ case FILE_MELONG:
+ case FILE_DATE:
+ case FILE_BEDATE:
+ case FILE_LEDATE:
+ case FILE_MEDATE:
+ case FILE_LDATE:
+ case FILE_BELDATE:
+ case FILE_LELDATE:
+ case FILE_MELDATE:
+ case FILE_FLOAT:
+ case FILE_BEFLOAT:
+ case FILE_LEFLOAT:
+ if (OFFSET_OOB(nbytes, offset, 4))
+ return 0;
+ break;
+
+ case FILE_DOUBLE:
+ case FILE_BEDOUBLE:
+ case FILE_LEDOUBLE:
+ if (OFFSET_OOB(nbytes, offset, 8))
+ return 0;
+ break;
+
+ case FILE_GUID:
+ if (OFFSET_OOB(nbytes, offset, 16))
+ return 0;
+ break;
+
+ case FILE_STRING:
+ case FILE_PSTRING:
+ case FILE_SEARCH:
+ case FILE_OCTAL:
+ if (OFFSET_OOB(nbytes, offset, m->vallen))
+ return 0;
+ break;
+
+ case FILE_REGEX:
+ if (nbytes < offset)
+ return 0;
+ break;
+
+ case FILE_INDIRECT:
+ if (m->str_flags & INDIRECT_RELATIVE)
+ offset += CAST(uint32_t, o);
+ if (offset == 0)
+ return 0;
+
+ if (nbytes < offset)
+ return 0;
+
+ if ((pb = file_push_buffer(ms)) == NULL)
+ return -1;
+
+ (*indir_count)++;
+ bb = *b;
+ bb.fbuf = s + offset;
+ bb.flen = nbytes - offset;
+ rv = -1;
+ for (mlp = ms->mlist[0]->next; mlp != ms->mlist[0];
+ mlp = mlp->next)
+ {
+ if ((rv = match(ms, mlp->magic, mlp->magic_rxcomp,
+ mlp->nmagic, &bb, 0, BINTEST, text, 0, indir_count,
+ name_count, printed_something, need_separator,
+ firstline, NULL, NULL)) != 0)
+ break;
+ }
+
+ if ((ms->flags & MAGIC_DEBUG) != 0)
+ fprintf(stderr, "indirect @offs=%u[%d]\n", offset, rv);
+
+ rbuf = file_pop_buffer(ms, pb);
+ if (rbuf == NULL && ms->event_flags & EVENT_HAD_ERR)
+ return -1;
+
+ if (rv == 1) {
+ if ((ms->flags & MAGIC_NODESC) == 0 &&
+ file_printf(ms, F(ms, m->desc, "%u"), offset) == -1)
+ {
+ free(rbuf);
+ return -1;
+ }
+ if (file_printf(ms, "%s", rbuf) == -1) {
+ free(rbuf);
+ return -1;
+ }
+ }
+ free(rbuf);
+ return rv;
+
+ case FILE_USE:
+ if (nbytes < offset)
+ return 0;
+ rbuf = m->value.s;
+ if (*rbuf == '^') {
+ rbuf++;
+ flip = !flip;
+ }
+ if (file_magicfind(ms, rbuf, &ml) == -1) {
+ file_error(ms, 0, "cannot find entry `%s'", rbuf);
+ return -1;
+ }
+ if (save_cont(ms, &c) == -1) {
+ file_error(ms, errno, "can't allocate continuation");
+ return -1;
+ }
+
+ oneed_separator = *need_separator;
+ if (m->flag & NOSPACE)
+ *need_separator = 0;
+
+ nfound_match = 0;
+ (*name_count)++;
+ eoffset = ms->eoffset;
+ rv = match(ms, ml.magic, ml.magic_rxcomp, ml.nmagic, b,
+ offset + o, mode, text, flip, indir_count, name_count,
+ printed_something, need_separator, firstline, returnval,
+ &nfound_match);
+ ms->ms_value.q = nfound_match;
+ (*name_count)--;
+ *found_match |= nfound_match;
+
+ restore_cont(ms, &c);
+
+ if (rv != 1)
+ *need_separator = oneed_separator;
+ ms->offset = offset;
+ ms->eoffset = eoffset;
+ return rv || *found_match;
+
+ case FILE_NAME:
+ if (ms->flags & MAGIC_NODESC)
+ return 1;
+ if (file_printf(ms, "%s", m->desc) == -1)
+ return -1;
+ return 1;
+ case FILE_DER:
+ case FILE_DEFAULT: /* nothing to check */
+ case FILE_CLEAR:
+ default:
+ break;
+ }
+ if (!mconvert(ms, m, flip))
+ return 0;
+ return 1;
+}
+
+file_private uint64_t
+file_strncmp(const char *s1, const char *s2, size_t len, size_t maxlen,
+ uint32_t flags)
+{
+ /*
+ * Convert the source args to unsigned here so that (1) the
+ * compare will be unsigned as it is in strncmp() and (2) so
+ * the ctype functions will work correctly without extra
+ * casting.
+ */
+ const unsigned char *a = RCAST(const unsigned char *, s1);
+ const unsigned char *b = RCAST(const unsigned char *, s2);
+ uint32_t ws = flags & (STRING_COMPACT_WHITESPACE |
+ STRING_COMPACT_OPTIONAL_WHITESPACE);
+ const unsigned char *eb = b + (ws ? maxlen : len);
+ uint64_t v;
+
+ /*
+ * What we want here is v = strncmp(s1, s2, len),
+ * but ignoring any nulls.
+ */
+ v = 0;
+ len++;
+ if (0L == flags) { /* normal string: do it fast */
+ while (--len > 0)
+ if ((v = *b++ - *a++) != '\0')
+ break;
+ }
+ else { /* combine the others */
+ while (--len > 0) {
+ if (b >= eb) {
+ v = 1;
+ break;
+ }
+ if ((flags & STRING_IGNORE_LOWERCASE) &&
+ islower(*a)) {
+ if ((v = tolower(*b++) - *a++) != '\0')
+ break;
+ }
+ else if ((flags & STRING_IGNORE_UPPERCASE) &&
+ isupper(*a)) {
+ if ((v = toupper(*b++) - *a++) != '\0')
+ break;
+ }
+ else if ((flags & STRING_COMPACT_WHITESPACE) &&
+ isspace(*a)) {
+ a++;
+ if (isspace(*b)) {
+ b++;
+ if (!isspace(*a))
+ while (b < eb && isspace(*b))
+ b++;
+ }
+ else {
+ v = 1;
+ break;
+ }
+ }
+ else if ((flags & STRING_COMPACT_OPTIONAL_WHITESPACE) &&
+ isspace(*a)) {
+ a++;
+ while (b < eb && isspace(*b))
+ b++;
+ }
+ else {
+ if ((v = *b++ - *a++) != '\0')
+ break;
+ }
+ }
+ if (len == 0 && v == 0 && (flags & STRING_FULL_WORD)) {
+ if (*b && !isspace(*b))
+ v = 1;
+ }
+ }
+ return v;
+}
+
+file_private uint64_t
+file_strncmp16(const char *a, const char *b, size_t len, size_t maxlen,
+ uint32_t flags)
+{
+ /*
+ * XXX - The 16-bit string compare probably needs to be done
+ * differently, especially if the flags are to be supported.
+ * At the moment, I am unsure.
+ */
+ flags = 0;
+ return file_strncmp(a, b, len, maxlen, flags);
+}
+
+file_private file_regex_t *
+alloc_regex(struct magic_set *ms, struct magic *m)
+{
+ int rc;
+ file_regex_t *rx = CAST(file_regex_t *, malloc(sizeof(*rx)));
+
+ if (rx == NULL) {
+ file_error(ms, errno, "can't allocate %" SIZE_T_FORMAT
+ "u bytes", sizeof(*rx));
+ return NULL;
+ }
+
+ rc = file_regcomp(ms, rx, m->value.s, REG_EXTENDED | REG_NEWLINE |
+ ((m->str_flags & STRING_IGNORE_CASE) ? REG_ICASE : 0));
+ if (rc == 0)
+ return rx;
+
+ free(rx);
+ return NULL;
+}
+
+file_private int
+magiccheck(struct magic_set *ms, struct magic *m, file_regex_t **m_cache)
+{
+ uint64_t l = m->value.q;
+ uint64_t v;
+ float fl, fv;
+ double dl, dv;
+ int matched;
+ union VALUETYPE *p = &ms->ms_value;
+
+ switch (m->type) {
+ case FILE_BYTE:
+ v = p->b;
+ break;
+
+ case FILE_SHORT:
+ case FILE_BESHORT:
+ case FILE_LESHORT:
+ case FILE_MSDOSDATE:
+ case FILE_LEMSDOSDATE:
+ case FILE_BEMSDOSDATE:
+ case FILE_MSDOSTIME:
+ case FILE_LEMSDOSTIME:
+ case FILE_BEMSDOSTIME:
+ v = p->h;
+ break;
+
+ case FILE_LONG:
+ case FILE_BELONG:
+ case FILE_LELONG:
+ case FILE_MELONG:
+ case FILE_DATE:
+ case FILE_BEDATE:
+ case FILE_LEDATE:
+ case FILE_MEDATE:
+ case FILE_LDATE:
+ case FILE_BELDATE:
+ case FILE_LELDATE:
+ case FILE_MELDATE:
+ v = p->l;
+ break;
+
+ case FILE_QUAD:
+ case FILE_LEQUAD:
+ case FILE_BEQUAD:
+ case FILE_QDATE:
+ case FILE_BEQDATE:
+ case FILE_LEQDATE:
+ case FILE_QLDATE:
+ case FILE_BEQLDATE:
+ case FILE_LEQLDATE:
+ case FILE_QWDATE:
+ case FILE_BEQWDATE:
+ case FILE_LEQWDATE:
+ case FILE_OFFSET:
+ v = p->q;
+ break;
+
+ case FILE_FLOAT:
+ case FILE_BEFLOAT:
+ case FILE_LEFLOAT:
+ fl = m->value.f;
+ fv = p->f;
+ switch (m->reln) {
+ case 'x':
+ matched = 1;
+ break;
+
+ case '!':
+ matched = isunordered(fl, fv) ? 1 : fv != fl;
+ break;
+
+ case '=':
+ matched = isunordered(fl, fv) ? 0 : fv == fl;
+ break;
+
+ case '>':
+ matched = isgreater(fv, fl);
+ break;
+
+ case '<':
+ matched = isless(fv, fl);
+ break;
+
+ default:
+ file_magerror(ms, "cannot happen with float: "
+ "invalid relation `%c'", m->reln);
+ return -1;
+ }
+ return matched;
+
+ case FILE_DOUBLE:
+ case FILE_BEDOUBLE:
+ case FILE_LEDOUBLE:
+ dl = m->value.d;
+ dv = p->d;
+ switch (m->reln) {
+ case 'x':
+ matched = 1;
+ break;
+
+ case '!':
+ matched = isunordered(dv, dl) ? 1 : dv != dl;
+ break;
+
+ case '=':
+ matched = isunordered(dv, dl) ? 0 : dv == dl;
+ break;
+
+ case '>':
+ matched = isgreater(dv, dl);
+ break;
+
+ case '<':
+ matched = isless(dv, dl);
+ break;
+
+ default:
+ file_magerror(ms, "cannot happen with double: "
+ "invalid relation `%c'", m->reln);
+ return -1;
+ }
+ return matched;
+
+ case FILE_DEFAULT:
+ case FILE_CLEAR:
+ l = 0;
+ v = 0;
+ break;
+
+ case FILE_STRING:
+ case FILE_PSTRING:
+ case FILE_OCTAL:
+ l = 0;
+ v = file_strncmp(m->value.s, p->s, CAST(size_t, m->vallen),
+ sizeof(p->s), m->str_flags);
+ break;
+
+ case FILE_BESTRING16:
+ case FILE_LESTRING16:
+ l = 0;
+ v = file_strncmp16(m->value.s, p->s, CAST(size_t, m->vallen),
+ sizeof(p->s), m->str_flags);
+ break;
+
+ case FILE_SEARCH: { /* search ms->search.s for the string m->value.s */
+ size_t slen;
+ size_t idx;
+
+ if (ms->search.s == NULL)
+ return 0;
+
+ slen = MIN(m->vallen, sizeof(m->value.s));
+ l = 0;
+ v = 0;
+ if ((ms->flags & MAGIC_DEBUG) != 0) {
+ fprintf(stderr, "search: [");
+ file_showstr(stderr, ms->search.s, ms->search.s_len);
+ fprintf(stderr, "] for [");
+ file_showstr(stderr, m->value.s, slen);
+ }
+#ifdef HAVE_MEMMEM
+ if (slen > 0 && m->str_flags == 0) {
+ const char *found;
+ idx = m->str_range + slen;
+ if (m->str_range == 0 || ms->search.s_len < idx)
+ idx = ms->search.s_len;
+ found = CAST(const char *, memmem(ms->search.s, idx,
+ m->value.s, slen));
+ if ((ms->flags & MAGIC_DEBUG) != 0) {
+ fprintf(stderr, "] %sfound\n",
+ found ? "" : "not ");
+ }
+ if (!found) {
+ v = 1;
+ break;
+ }
+ idx = found - ms->search.s;
+ ms->search.offset += idx;
+ ms->search.rm_len = ms->search.s_len - idx;
+ break;
+ }
+#endif
+
+ for (idx = 0; m->str_range == 0 || idx < m->str_range; idx++) {
+ if (slen + idx > ms->search.s_len) {
+ v = 1;
+ break;
+ }
+
+ v = file_strncmp(m->value.s, ms->search.s + idx, slen,
+ ms->search.s_len - idx, m->str_flags);
+ if (v == 0) { /* found match */
+ ms->search.offset += idx;
+ ms->search.rm_len = ms->search.s_len - idx;
+ break;
+ }
+ }
+ if ((ms->flags & MAGIC_DEBUG) != 0) {
+ fprintf(stderr, "] %sfound\n", v == 0 ? "" : "not ");
+ }
+ break;
+ }
+ case FILE_REGEX: {
+ int rc;
+ file_regex_t *rx = *m_cache;
+ const char *search;
+ regmatch_t pmatch;
+ size_t slen = ms->search.s_len;
+ char *copy;
+
+ if (ms->search.s == NULL)
+ return 0;
+
+ if (rx == NULL) {
+ rx = *m_cache = alloc_regex(ms, m);
+ if (rx == NULL)
+ return -1;
+ }
+ l = 0;
+ if (slen != 0) {
+ copy = CAST(char *, malloc(slen));
+ if (copy == NULL) {
+ file_error(ms, errno,
+ "can't allocate %" SIZE_T_FORMAT "u bytes",
+ slen);
+ return -1;
+ }
+ memcpy(copy, ms->search.s, slen);
+ copy[--slen] = '\0';
+ search = copy;
+ } else {
+ search = CCAST(char *, "");
+ copy = NULL;
+ }
+ rc = file_regexec(ms, rx, RCAST(const char *, search),
+ 1, &pmatch, 0);
+ free(copy);
+ switch (rc) {
+ case 0:
+ ms->search.s += CAST(int, pmatch.rm_so);
+ ms->search.offset += CAST(size_t, pmatch.rm_so);
+ ms->search.rm_len = CAST(size_t,
+ pmatch.rm_eo - pmatch.rm_so);
+ v = 0;
+ break;
+
+ case REG_NOMATCH:
+ v = 1;
+ break;
+
+ default:
+ return -1;
+ }
+ break;
+ }
+ case FILE_USE:
+ return ms->ms_value.q != 0;
+ case FILE_NAME:
+ case FILE_INDIRECT:
+ return 1;
+ case FILE_DER:
+ matched = der_cmp(ms, m);
+ if (matched == -1) {
+ if ((ms->flags & MAGIC_DEBUG) != 0) {
+ (void) fprintf(stderr,
+ "EOF comparing DER entries\n");
+ }
+ return 0;
+ }
+ return matched;
+ case FILE_GUID:
+ l = 0;
+ v = memcmp(m->value.guid, p->guid, sizeof(p->guid));
+ break;
+ default:
+ file_magerror(ms, "invalid type %d in magiccheck()", m->type);
+ return -1;
+ }
+
+ v = file_signextend(ms, m, v);
+
+ switch (m->reln) {
+ case 'x':
+ if ((ms->flags & MAGIC_DEBUG) != 0)
+ (void) fprintf(stderr, "%" INT64_T_FORMAT
+ "u == *any* = 1\n", CAST(unsigned long long, v));
+ matched = 1;
+ break;
+
+ case '!':
+ matched = v != l;
+ if ((ms->flags & MAGIC_DEBUG) != 0)
+ (void) fprintf(stderr, "%" INT64_T_FORMAT "u != %"
+ INT64_T_FORMAT "u = %d\n",
+ CAST(unsigned long long, v),
+ CAST(unsigned long long, l), matched);
+ break;
+
+ case '=':
+ matched = v == l;
+ if ((ms->flags & MAGIC_DEBUG) != 0)
+ (void) fprintf(stderr, "%" INT64_T_FORMAT "u == %"
+ INT64_T_FORMAT "u = %d\n",
+ CAST(unsigned long long, v),
+ CAST(unsigned long long, l), matched);
+ break;
+
+ case '>':
+ if (m->flag & UNSIGNED) {
+ matched = v > l;
+ if ((ms->flags & MAGIC_DEBUG) != 0)
+ (void) fprintf(stderr, "%" INT64_T_FORMAT
+ "u > %" INT64_T_FORMAT "u = %d\n",
+ CAST(unsigned long long, v),
+ CAST(unsigned long long, l), matched);
+ }
+ else {
+ matched = CAST(int64_t, v) > CAST(int64_t, l);
+ if ((ms->flags & MAGIC_DEBUG) != 0)
+ (void) fprintf(stderr, "%" INT64_T_FORMAT
+ "d > %" INT64_T_FORMAT "d = %d\n",
+ CAST(long long, v),
+ CAST(long long, l), matched);
+ }
+ break;
+
+ case '<':
+ if (m->flag & UNSIGNED) {
+ matched = v < l;
+ if ((ms->flags & MAGIC_DEBUG) != 0)
+ (void) fprintf(stderr, "%" INT64_T_FORMAT
+ "u < %" INT64_T_FORMAT "u = %d\n",
+ CAST(unsigned long long, v),
+ CAST(unsigned long long, l), matched);
+ }
+ else {
+ matched = CAST(int64_t, v) < CAST(int64_t, l);
+ if ((ms->flags & MAGIC_DEBUG) != 0)
+ (void) fprintf(stderr, "%" INT64_T_FORMAT
+ "d < %" INT64_T_FORMAT "d = %d\n",
+ CAST(long long, v),
+ CAST(long long, l), matched);
+ }
+ break;
+
+ case '&':
+ matched = (v & l) == l;
+ if ((ms->flags & MAGIC_DEBUG) != 0)
+ (void) fprintf(stderr, "((%" INT64_T_FORMAT "x & %"
+ INT64_T_FORMAT "x) == %" INT64_T_FORMAT
+ "x) = %d\n", CAST(unsigned long long, v),
+ CAST(unsigned long long, l),
+ CAST(unsigned long long, l),
+ matched);
+ break;
+
+ case '^':
+ matched = (v & l) != l;
+ if ((ms->flags & MAGIC_DEBUG) != 0)
+ (void) fprintf(stderr, "((%" INT64_T_FORMAT "x & %"
+ INT64_T_FORMAT "x) != %" INT64_T_FORMAT
+ "x) = %d\n", CAST(unsigned long long, v),
+ CAST(unsigned long long, l),
+ CAST(unsigned long long, l), matched);
+ break;
+
+ default:
+ file_magerror(ms, "cannot happen: invalid relation `%c'",
+ m->reln);
+ return -1;
+ }
+
+ return matched;
+}
+
+file_private int
+handle_annotation(struct magic_set *ms, struct magic *m, int firstline)
+{
+ if ((ms->flags & MAGIC_APPLE) && m->apple[0]) {
+ if (print_sep(ms, firstline) == -1)
+ return -1;
+ if (file_printf(ms, "%.8s", m->apple) == -1)
+ return -1;
+ return 1;
+ }
+ if ((ms->flags & MAGIC_EXTENSION) && m->ext[0]) {
+ if (print_sep(ms, firstline) == -1)
+ return -1;
+ if (file_printf(ms, "%s", m->ext) == -1)
+ return -1;
+ return 1;
+ }
+ if ((ms->flags & MAGIC_MIME_TYPE) && m->mimetype[0]) {
+ char buf[1024];
+ const char *p;
+ if (print_sep(ms, firstline) == -1)
+ return -1;
+ if (varexpand(ms, buf, sizeof(buf), m->mimetype) == -1)
+ p = m->mimetype;
+ else
+ p = buf;
+ if (file_printf(ms, "%s", p) == -1)
+ return -1;
+ return 1;
+ }
+ return 0;
+}
+
+file_private int
+print_sep(struct magic_set *ms, int firstline)
+{
+ if (firstline)
+ return 0;
+ /*
+ * we found another match
+ * put a newline and '-' to do some simple formatting
+ */
+ return file_separator(ms);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-30 17:27:50 +0000