mirror of
https://github.com/php/php-src.git
synced 2024-09-23 02:47:26 +00:00
387 lines
8.2 KiB
C
387 lines
8.2 KiB
C
/*
|
|
zip_extra_field.c -- manipulate extra fields
|
|
Copyright (C) 2012-2015 Dieter Baron and Thomas Klausner
|
|
|
|
This file is part of libzip, a library to manipulate ZIP archives.
|
|
The authors can be contacted at <libzip@nih.at>
|
|
|
|
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, 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.
|
|
3. The names of the authors may not be used to endorse or promote
|
|
products derived from this software without specific prior
|
|
written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``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 AUTHORS 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.
|
|
*/
|
|
|
|
|
|
|
|
#include "zipint.h"
|
|
|
|
#include <errno.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
|
|
|
|
struct zip_extra_field *
|
|
_zip_ef_clone(const struct zip_extra_field *ef, struct zip_error *error)
|
|
{
|
|
struct zip_extra_field *head, *prev, *def;
|
|
|
|
head = prev = NULL;
|
|
|
|
while (ef) {
|
|
if ((def=_zip_ef_new(ef->id, ef->size, ef->data, ef->flags)) == NULL) {
|
|
_zip_error_set(error, ZIP_ER_MEMORY, 0);
|
|
_zip_ef_free(head);
|
|
return NULL;
|
|
}
|
|
|
|
if (head == NULL)
|
|
head = def;
|
|
if (prev)
|
|
prev->next = def;
|
|
prev = def;
|
|
|
|
ef = ef->next;
|
|
}
|
|
|
|
return head;
|
|
}
|
|
|
|
|
|
struct zip_extra_field *
|
|
_zip_ef_delete_by_id(struct zip_extra_field *ef, zip_uint16_t id, zip_uint16_t id_idx, zip_flags_t flags)
|
|
{
|
|
struct zip_extra_field *head, *prev;
|
|
int i;
|
|
|
|
i = 0;
|
|
head = ef;
|
|
prev = NULL;
|
|
for (; ef; ef=(prev ? prev->next : head)) {
|
|
if ((ef->flags & flags & ZIP_EF_BOTH) && ((ef->id == id) || (id == ZIP_EXTRA_FIELD_ALL))) {
|
|
if (id_idx == ZIP_EXTRA_FIELD_ALL || i == id_idx) {
|
|
ef->flags &= ~(flags & ZIP_EF_BOTH);
|
|
if ((ef->flags & ZIP_EF_BOTH) == 0) {
|
|
if (prev)
|
|
prev->next = ef->next;
|
|
else
|
|
head = ef->next;
|
|
ef->next = NULL;
|
|
_zip_ef_free(ef);
|
|
|
|
if (id_idx == ZIP_EXTRA_FIELD_ALL)
|
|
continue;
|
|
}
|
|
}
|
|
|
|
i++;
|
|
if (i > id_idx)
|
|
break;
|
|
}
|
|
prev = ef;
|
|
}
|
|
|
|
return head;
|
|
}
|
|
|
|
|
|
|
|
|
|
void
|
|
_zip_ef_free(struct zip_extra_field *ef)
|
|
{
|
|
struct zip_extra_field *ef2;
|
|
|
|
while (ef) {
|
|
ef2 = ef->next;
|
|
free(ef->data);
|
|
free(ef);
|
|
ef = ef2;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
const zip_uint8_t *
|
|
_zip_ef_get_by_id(const struct zip_extra_field *ef, zip_uint16_t *lenp, zip_uint16_t id, zip_uint16_t id_idx, zip_flags_t flags, struct zip_error *error)
|
|
{
|
|
static const zip_uint8_t empty[1] = { '\0' };
|
|
|
|
int i;
|
|
|
|
i = 0;
|
|
for (; ef; ef=ef->next) {
|
|
if (ef->id == id && (ef->flags & flags & ZIP_EF_BOTH)) {
|
|
if (i < id_idx) {
|
|
i++;
|
|
continue;
|
|
}
|
|
|
|
if (lenp)
|
|
*lenp = ef->size;
|
|
if (ef->size > 0)
|
|
return ef->data;
|
|
else
|
|
return empty;
|
|
}
|
|
}
|
|
|
|
_zip_error_set(error, ZIP_ER_NOENT, 0);
|
|
return NULL;
|
|
}
|
|
|
|
|
|
|
|
struct zip_extra_field *
|
|
_zip_ef_merge(struct zip_extra_field *to, struct zip_extra_field *from)
|
|
{
|
|
struct zip_extra_field *ef2, *tt, *tail;
|
|
int duplicate;
|
|
|
|
if (to == NULL)
|
|
return from;
|
|
|
|
for (tail=to; tail->next; tail=tail->next)
|
|
;
|
|
|
|
for (; from; from=ef2) {
|
|
ef2 = from->next;
|
|
|
|
duplicate = 0;
|
|
for (tt=to; tt; tt=tt->next) {
|
|
if (tt->id == from->id && tt->size == from->size && memcmp(tt->data, from->data, tt->size) == 0) {
|
|
tt->flags |= (from->flags & ZIP_EF_BOTH);
|
|
duplicate = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
from->next = NULL;
|
|
if (duplicate)
|
|
_zip_ef_free(from);
|
|
else
|
|
tail = tail->next = from;
|
|
}
|
|
|
|
return to;
|
|
}
|
|
|
|
|
|
|
|
struct zip_extra_field *
|
|
_zip_ef_new(zip_uint16_t id, zip_uint16_t size, const zip_uint8_t *data, zip_flags_t flags)
|
|
{
|
|
struct zip_extra_field *ef;
|
|
|
|
if ((ef=(struct zip_extra_field *)malloc(sizeof(*ef))) == NULL)
|
|
return NULL;
|
|
|
|
ef->next = NULL;
|
|
ef->flags = flags;
|
|
ef->id = id;
|
|
ef->size = size;
|
|
if (size > 0) {
|
|
if ((ef->data=(zip_uint8_t *)_zip_memdup(data, size, NULL)) == NULL) {
|
|
free(ef);
|
|
return NULL;
|
|
}
|
|
}
|
|
else
|
|
ef->data = NULL;
|
|
|
|
return ef;
|
|
}
|
|
|
|
|
|
|
|
struct zip_extra_field *
|
|
_zip_ef_parse(const zip_uint8_t *data, zip_uint16_t len, zip_flags_t flags, struct zip_error *error)
|
|
{
|
|
struct zip_extra_field *ef, *ef2, *ef_head;
|
|
const zip_uint8_t *p;
|
|
zip_uint16_t fid, flen;
|
|
|
|
ef_head = NULL;
|
|
for (p=data; p<data+len; p+=flen) {
|
|
if (p+4 > data+len) {
|
|
_zip_error_set(error, ZIP_ER_INCONS, 0);
|
|
_zip_ef_free(ef_head);
|
|
return NULL;
|
|
}
|
|
|
|
fid = _zip_read2(&p);
|
|
flen = _zip_read2(&p);
|
|
|
|
if (p+flen > data+len) {
|
|
_zip_error_set(error, ZIP_ER_INCONS, 0);
|
|
_zip_ef_free(ef_head);
|
|
return NULL;
|
|
}
|
|
|
|
if ((ef2=_zip_ef_new(fid, flen, p, flags)) == NULL) {
|
|
_zip_error_set(error, ZIP_ER_MEMORY, 0);
|
|
_zip_ef_free(ef_head);
|
|
return NULL;
|
|
}
|
|
|
|
if (ef_head) {
|
|
ef->next = ef2;
|
|
ef = ef2;
|
|
}
|
|
else
|
|
ef_head = ef = ef2;
|
|
}
|
|
|
|
return ef_head;
|
|
}
|
|
|
|
|
|
|
|
struct zip_extra_field *
|
|
_zip_ef_remove_internal(struct zip_extra_field *ef)
|
|
{
|
|
struct zip_extra_field *ef_head;
|
|
struct zip_extra_field *prev, *next;
|
|
|
|
ef_head = ef;
|
|
prev = NULL;
|
|
|
|
while (ef) {
|
|
if (ZIP_EF_IS_INTERNAL(ef->id)) {
|
|
next = ef->next;
|
|
if (ef_head == ef)
|
|
ef_head = next;
|
|
ef->next = NULL;
|
|
_zip_ef_free(ef);
|
|
if (prev)
|
|
prev->next = next;
|
|
ef = next;
|
|
}
|
|
else {
|
|
prev = ef;
|
|
ef = ef->next;
|
|
}
|
|
}
|
|
|
|
return ef_head;
|
|
}
|
|
|
|
|
|
zip_uint16_t
|
|
_zip_ef_size(const struct zip_extra_field *ef, zip_flags_t flags)
|
|
{
|
|
zip_uint16_t size;
|
|
|
|
size = 0;
|
|
for (; ef; ef=ef->next) {
|
|
if (ef->flags & flags & ZIP_EF_BOTH)
|
|
size += 4+ef->size;
|
|
}
|
|
|
|
return size;
|
|
}
|
|
|
|
|
|
|
|
void
|
|
_zip_ef_write(const struct zip_extra_field *ef, zip_flags_t flags, FILE *f)
|
|
{
|
|
for (; ef; ef=ef->next) {
|
|
if (ef->flags & flags & ZIP_EF_BOTH) {
|
|
_zip_write2(ef->id, f);
|
|
_zip_write2(ef->size, f);
|
|
if (ef->size > 0)
|
|
fwrite(ef->data, ef->size, 1, f);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
int
|
|
_zip_read_local_ef(struct zip *za, zip_uint64_t idx)
|
|
{
|
|
struct zip_entry *e;
|
|
unsigned char b[4];
|
|
const unsigned char *p;
|
|
zip_uint16_t fname_len, ef_len;
|
|
|
|
if (idx >= za->nentry) {
|
|
_zip_error_set(&za->error, ZIP_ER_INVAL, 0);
|
|
return -1;
|
|
}
|
|
|
|
e = za->entry+idx;
|
|
|
|
if (e->orig == NULL || e->orig->local_extra_fields_read)
|
|
return 0;
|
|
|
|
|
|
if (fseeko(za->zp, (off_t)(e->orig->offset + 26), SEEK_SET) < 0) {
|
|
_zip_error_set(&za->error, ZIP_ER_SEEK, errno);
|
|
return -1;
|
|
}
|
|
|
|
if (fread(b, sizeof(b), 1, za->zp) != 1) {
|
|
_zip_error_set(&za->error, ZIP_ER_READ, errno);
|
|
return -1;
|
|
}
|
|
|
|
p = b;
|
|
fname_len = _zip_read2(&p);
|
|
ef_len = _zip_read2(&p);
|
|
|
|
if (ef_len > 0) {
|
|
struct zip_extra_field *ef;
|
|
zip_uint8_t *ef_raw;
|
|
|
|
if (fseek(za->zp, fname_len, SEEK_CUR) < 0) {
|
|
_zip_error_set(&za->error, ZIP_ER_SEEK, errno);
|
|
return -1;
|
|
}
|
|
|
|
ef_raw = _zip_read_data(NULL, za->zp, ef_len, 0, &za->error);
|
|
|
|
if (ef_raw == NULL)
|
|
return -1;
|
|
|
|
if ((ef=_zip_ef_parse(ef_raw, ef_len, ZIP_EF_LOCAL, &za->error)) == NULL) {
|
|
free(ef_raw);
|
|
return -1;
|
|
}
|
|
free(ef_raw);
|
|
|
|
ef = _zip_ef_remove_internal(ef);
|
|
e->orig->extra_fields = _zip_ef_merge(e->orig->extra_fields, ef);
|
|
}
|
|
|
|
e->orig->local_extra_fields_read = 1;
|
|
|
|
if (e->changes && e->changes->local_extra_fields_read == 0) {
|
|
e->changes->extra_fields = e->orig->extra_fields;
|
|
e->changes->local_extra_fields_read = 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|