struct zip *
_zip_open(const char *fn, FILE *fp, int flags, int aflags, int *zep)
{
struct zip *za;
struct zip_cdir *cdir;
int i;
off_t len;
if (fseeko(fp, 0, SEEK_END) < 0) {
*zep = ZIP_ER_SEEK;
return NULL;
}
len = ftello(fp);
/* treat empty files as empty archives */
if (len == 0) {
if ((za=_zip_allocate_new(fn, zep)) == NULL)
fclose(fp);
else
za->zp = fp;
return za;
}
cdir = _zip_find_central_dir(fp, flags, zep, len);
if (cdir == NULL) {
fclose(fp);
return NULL;
}
if ((za=_zip_allocate_new(fn, zep)) == NULL) {
_zip_cdir_free(cdir);
fclose(fp);
return NULL;
}
za->cdir = cdir;
za->zp = fp;
if ((za->entry=(struct zip_entry *)malloc(sizeof(*(za->entry))
* cdir->nentry)) == NULL) {
set_error(zep, NULL, ZIP_ER_MEMORY);
_zip_free(za);
return NULL;
}
for (i=0; i<cdir->nentry; i++)
_zip_entry_new(za);
_zip_check_torrentzip(za);
za->ch_flags = za->flags;
return za;
}
struct zip *
_zip_open(const char *fn, FILE *fp, unsigned int flags, int *zep)
{
struct zip *za;
struct zip_cdir *cdir;
off_t len;
if (fseeko(fp, 0, SEEK_END) < 0) {
*zep = ZIP_ER_SEEK;
return NULL;
}
len = ftello(fp);
/* treat empty files as empty archives */
if (len == 0) {
if ((za=_zip_allocate_new(fn, flags, zep)) == NULL)
fclose(fp);
else
za->zp = fp;
return za;
}
cdir = _zip_find_central_dir(fp, flags, zep, len);
if (cdir == NULL) {
fclose(fp);
return NULL;
}
if ((za=_zip_allocate_new(fn, flags, zep)) == NULL) {
_zip_cdir_free(cdir);
fclose(fp);
return NULL;
}
za->entry = cdir->entry;
za->nentry = cdir->nentry;
za->nentry_alloc = cdir->nentry_alloc;
za->comment_orig = cdir->comment;
za->zp = fp;
_zip_check_torrentzip(za, cdir);
za->ch_flags = za->flags;
free(cdir);
return za;
}
void
_zip_free(struct zip *za)
{
int i;
if (za == NULL)
return;
if (za->zn)
free(za->zn);
if (za->zp)
fclose(za->zp);
_zip_cdir_free(za->cdir);
if (za->entry) {
for (i=0; i<za->nentry; i++) {
_zip_entry_free(za->entry+i);
}
free(za->entry);
}
for (i=0; i<za->nfile; i++) {
if (za->file[i]->error.zip_err == ZIP_ER_OK) {
_zip_error_set(&za->file[i]->error, ZIP_ER_ZIPCLOSED, 0);
za->file[i]->za = NULL;
}
}
free(za->file);
free(za);
return;
}
static struct zip_cdir *
_zip_find_central_dir(FILE *fp, unsigned int flags, int *zep, off_t len)
{
struct zip_cdir *cdir, *cdirnew;
unsigned char *buf, *match;
off_t buf_offset;
size_t buflen;
zip_int64_t a, i;
zip_int64_t best;
struct zip_error zerr;
if (len < (off_t)EOCDLEN) {
set_error(zep, NULL, ZIP_ER_NOZIP);
return NULL;
}
i = fseeko(fp, -(len < CDBUFSIZE ? len : CDBUFSIZE), SEEK_END);
if (i == -1 && errno != EFBIG) {
/* seek before start of file on my machine */
set_error(zep, NULL, ZIP_ER_SEEK);
return NULL;
}
buf_offset = ftello(fp);
/* 64k is too much for stack */
if ((buf=(unsigned char *)malloc(CDBUFSIZE)) == NULL) {
set_error(zep, NULL, ZIP_ER_MEMORY);
return NULL;
}
clearerr(fp);
buflen = fread(buf, 1, CDBUFSIZE, fp);
if (ferror(fp)) {
set_error(zep, NULL, ZIP_ER_READ);
free(buf);
return NULL;
}
best = -1;
cdir = NULL;
match = buf+ (buflen < CDBUFSIZE ? 0 : EOCD64LOCLEN);
_zip_error_set(&zerr, ZIP_ER_NOZIP, 0);
while ((match=_zip_memmem(match, buflen-(size_t)(match-buf)-(EOCDLEN-4),
(const unsigned char *)EOCD_MAGIC, 4))!=NULL) {
/* found match -- check, if good */
/* to avoid finding the same match all over again */
match++;
if ((cdirnew=_zip_readcdir(fp, buf_offset, buf, match-1, buflen, flags,
&zerr)) == NULL)
continue;
if (cdir) {
if (best <= 0)
best = _zip_checkcons(fp, cdir, &zerr);
a = _zip_checkcons(fp, cdirnew, &zerr);
if (best < a) {
_zip_cdir_free(cdir);
cdir = cdirnew;
best = a;
}
else
_zip_cdir_free(cdirnew);
}
else {
cdir = cdirnew;
if (flags & ZIP_CHECKCONS)
best = _zip_checkcons(fp, cdir, &zerr);
else
best = 0;
}
cdirnew = NULL;
}
free(buf);
if (best < 0) {
set_error(zep, &zerr, 0);
_zip_cdir_free(cdir);
return NULL;
}
return cdir;
}
static struct zip_cdir *
_zip_readcdir(FILE *fp, off_t buf_offset, unsigned char *buf, const unsigned char *eocd, size_t buflen,
unsigned int flags, struct zip_error *error)
{
struct zip_cdir *cd;
const unsigned char *cdp;
const unsigned char **bufp;
zip_int64_t tail_len, comment_len;
zip_uint64_t i, left;
tail_len = buf + buflen - eocd - EOCDLEN;
if (tail_len < 0) {
/* not enough bytes left for comment */
_zip_error_set(error, ZIP_ER_NOZIP, 0);
return NULL;
}
/* check for end-of-central-dir magic */
if (memcmp(eocd, EOCD_MAGIC, 4) != 0) {
_zip_error_set(error, ZIP_ER_NOZIP, 0);
return NULL;
}
if (memcmp(eocd+4, "\0\0\0\0", 4) != 0) {
_zip_error_set(error, ZIP_ER_MULTIDISK, 0);
return NULL;
}
if (eocd-EOCD64LOCLEN >= buf && memcmp(eocd-EOCD64LOCLEN, EOCD64LOC_MAGIC, 4) == 0)
cd = _zip_read_eocd64(fp, eocd-EOCD64LOCLEN, buf, buf_offset, buflen, flags, error);
else
cd = _zip_read_eocd(eocd, buf, buf_offset, buflen, flags, error);
if (cd == NULL)
return NULL;
cdp = eocd + 20;
comment_len = _zip_read2(&cdp);
if ((zip_uint64_t)cd->offset+(zip_uint64_t)cd->size > (zip_uint64_t)buf_offset + (zip_uint64_t)(eocd-buf)) {
/* cdir spans past EOCD record */
_zip_error_set(error, ZIP_ER_INCONS, 0);
_zip_cdir_free(cd);
return NULL;
}
if (tail_len < comment_len || ((flags & ZIP_CHECKCONS) && tail_len != comment_len)) {
_zip_error_set(error, ZIP_ER_INCONS, 0);
_zip_cdir_free(cd);
return NULL;
}
if (comment_len) {
if ((cd->comment=_zip_string_new(eocd+EOCDLEN, (zip_uint16_t)comment_len, ZIP_FL_ENC_GUESS, error)) == NULL) {
_zip_cdir_free(cd);
return NULL;
}
}
if (cd->offset >= buf_offset) {
/* if buffer already read in, use it */
cdp = buf + (cd->offset - buf_offset);
bufp = &cdp;
}
else {
/* go to start of cdir and read it entry by entry */
bufp = NULL;
clearerr(fp);
fseeko(fp, cd->offset, SEEK_SET);
/* possible consistency check: cd->offset =
len-(cd->size+cd->comment_len+EOCDLEN) ? */
if (ferror(fp) || (ftello(fp) != cd->offset)) {
/* seek error or offset of cdir wrong */
if (ferror(fp))
_zip_error_set(error, ZIP_ER_SEEK, errno);
else
_zip_error_set(error, ZIP_ER_NOZIP, 0);
_zip_cdir_free(cd);
return NULL;
}
}
left = (zip_uint64_t)cd->size;
i=0;
while (i<cd->nentry && left > 0) {
if ((cd->entry[i].orig=_zip_dirent_new()) == NULL
|| (_zip_dirent_read(cd->entry[i].orig, fp, bufp, &left, 0, error)) < 0) {
_zip_cdir_free(cd);
return NULL;
}
i++;
}
if (i != cd->nentry || ((flags & ZIP_CHECKCONS) && left != 0)) {
_zip_error_set(error, ZIP_ER_INCONS, 0);
_zip_cdir_free(cd);
return NULL;
}
return cd;
}
ZIP_EXTERN struct zip *
zip_open(const char *fn, int flags, int *zep)
{
FILE *fp;
struct zip *za;
struct zip_cdir *cdir;
int i;
off_t len;
switch (_zip_file_exists(fn, flags, zep)) {
case -1:
return NULL;
case 0:
return _zip_allocate_new(fn, zep);
default:
break;
}
if ((fp=fopen(fn, "rb")) == NULL) {
set_error(zep, NULL, ZIP_ER_OPEN);
return NULL;
}
fseeko(fp, 0, SEEK_END);
len = ftello(fp);
/* treat empty files as empty archives */
if (len == 0) {
if ((za=_zip_allocate_new(fn, zep)) == NULL)
fclose(fp);
else
za->zp = fp;
return za;
}
cdir = _zip_find_central_dir(fp, flags, zep, len);
if (cdir == NULL) {
fclose(fp);
return NULL;
}
if ((za=_zip_allocate_new(fn, zep)) == NULL) {
_zip_cdir_free(cdir);
fclose(fp);
return NULL;
}
za->cdir = cdir;
za->zp = fp;
if ((za->entry=(struct zip_entry *)malloc(sizeof(*(za->entry))
* cdir->nentry)) == NULL) {
set_error(zep, NULL, ZIP_ER_MEMORY);
_zip_free(za);
return NULL;
}
for (i=0; i<cdir->nentry; i++)
_zip_entry_new(za);
_zip_check_torrentzip(za);
za->ch_flags = za->flags;
return za;
}
static struct zip_cdir *
_zip_readcdir(FILE *fp, unsigned char *buf, unsigned char *eocd, int buflen,
int flags, struct zip_error *error)
{
struct zip_cdir *cd;
unsigned char *cdp, **bufp;
int i, comlen, nentry;
unsigned int left;
comlen = buf + buflen - eocd - EOCDLEN;
if (comlen < 0) {
/* not enough bytes left for comment */
_zip_error_set(error, ZIP_ER_NOZIP, 0);
return NULL;
}
/* check for end-of-central-dir magic */
if (memcmp(eocd, EOCD_MAGIC, 4) != 0) {
_zip_error_set(error, ZIP_ER_NOZIP, 0);
return NULL;
}
if (memcmp(eocd+4, "\0\0\0\0", 4) != 0) {
_zip_error_set(error, ZIP_ER_MULTIDISK, 0);
return NULL;
}
cdp = eocd + 8;
/* number of cdir-entries on this disk */
i = _zip_read2(&cdp);
/* number of cdir-entries */
nentry = _zip_read2(&cdp);
if ((cd=_zip_cdir_new(nentry, error)) == NULL)
return NULL;
cd->size = _zip_read4(&cdp);
cd->offset = _zip_read4(&cdp);
cd->comment = NULL;
cd->comment_len = _zip_read2(&cdp);
if ((comlen < cd->comment_len) || (cd->nentry != i)) {
_zip_error_set(error, ZIP_ER_NOZIP, 0);
free(cd);
return NULL;
}
if ((flags & ZIP_CHECKCONS) && comlen != cd->comment_len) {
_zip_error_set(error, ZIP_ER_INCONS, 0);
free(cd);
return NULL;
}
if (cd->comment_len) {
if ((cd->comment=(char *)_zip_memdup(eocd+EOCDLEN,
cd->comment_len, error))
== NULL) {
free(cd);
return NULL;
}
}
if (cd->size < (unsigned int)(eocd-buf)) {
/* if buffer already read in, use it */
cdp = eocd - cd->size;
bufp = &cdp;
}
else {
/* go to start of cdir and read it entry by entry */
bufp = NULL;
clearerr(fp);
fseeko(fp, cd->offset, SEEK_SET);
/* possible consistency check: cd->offset =
len-(cd->size+cd->comment_len+EOCDLEN) ? */
if (ferror(fp) || ((unsigned long)ftello(fp) != cd->offset)) {
/* seek error or offset of cdir wrong */
if (ferror(fp))
_zip_error_set(error, ZIP_ER_SEEK, errno);
else
_zip_error_set(error, ZIP_ER_NOZIP, 0);
free(cd);
return NULL;
}
}
left = cd->size;
i=0;
do {
if (i == cd->nentry && left > 0) {
/* Infozip extension for more than 64k entries:
nentries wraps around, size indicates correct EOCD */
_zip_cdir_grow(cd, cd->nentry+0x10000, error);
}
if ((_zip_dirent_read(cd->entry+i, fp, bufp, &left, 0, error)) < 0) {
cd->nentry = i;
_zip_cdir_free(cd);
return NULL;
}
i++;
} while (i<cd->nentry);
return cd;
}
static zip_cdir_t *
_zip_find_central_dir(zip_t *za, zip_uint64_t len)
{
zip_cdir_t *cdir, *cdirnew;
zip_uint8_t *match;
zip_int64_t buf_offset;
zip_uint64_t buflen;
zip_int64_t a;
zip_int64_t best;
zip_error_t error;
zip_buffer_t *buffer;
if (len < EOCDLEN) {
zip_error_set(&za->error, ZIP_ER_NOZIP, 0);
return NULL;
}
buflen = (len < CDBUFSIZE ? len : CDBUFSIZE);
if (zip_source_seek(za->src, -(zip_int64_t)buflen, SEEK_END) < 0) {
zip_error_t *src_error = zip_source_error(za->src);
if (zip_error_code_zip(src_error) != ZIP_ER_SEEK || zip_error_code_system(src_error) != EFBIG) {
/* seek before start of file on my machine */
_zip_error_copy(&za->error, src_error);
return NULL;
}
}
if ((buf_offset = zip_source_tell(za->src)) < 0) {
_zip_error_set_from_source(&za->error, za->src);
return NULL;
}
if ((buffer = _zip_buffer_new_from_source(za->src, buflen, NULL, &za->error)) == NULL) {
return NULL;
}
best = -1;
cdir = NULL;
if (buflen >= CDBUFSIZE) {
/* EOCD64 locator is before EOCD, so leave place for it */
_zip_buffer_set_offset(buffer, EOCD64LOCLEN);
}
zip_error_set(&error, ZIP_ER_NOZIP, 0);
match = _zip_buffer_get(buffer, 0);
while ((match=_zip_memmem(match, _zip_buffer_left(buffer)-(EOCDLEN-4), (const unsigned char *)EOCD_MAGIC, 4)) != NULL) {
_zip_buffer_set_offset(buffer, (zip_uint64_t)(match - _zip_buffer_data(buffer)));
if ((cdirnew = _zip_read_cdir(za, buffer, (zip_uint64_t)buf_offset, &error)) != NULL) {
if (cdir) {
if (best <= 0) {
best = _zip_checkcons(za, cdir, &error);
}
a = _zip_checkcons(za, cdirnew, &error);
if (best < a) {
_zip_cdir_free(cdir);
cdir = cdirnew;
best = a;
}
else {
_zip_cdir_free(cdirnew);
}
}
else {
cdir = cdirnew;
if (za->open_flags & ZIP_CHECKCONS)
best = _zip_checkcons(za, cdir, &error);
else {
best = 0;
}
}
cdirnew = NULL;
}
match++;
_zip_buffer_set_offset(buffer, (zip_uint64_t)(match - _zip_buffer_data(buffer)));
}
_zip_buffer_free(buffer);
if (best < 0) {
_zip_error_copy(&za->error, &error);
_zip_cdir_free(cdir);
return NULL;
}
return cdir;
}
static zip_cdir_t *
_zip_read_cdir(zip_t *za, zip_buffer_t *buffer, zip_uint64_t buf_offset, zip_error_t *error)
{
zip_cdir_t *cd;
zip_uint16_t comment_len;
zip_uint64_t i, left;
zip_uint64_t eocd_offset = _zip_buffer_offset(buffer);
zip_buffer_t *cd_buffer;
if (_zip_buffer_left(buffer) < EOCDLEN) {
/* not enough bytes left for comment */
zip_error_set(error, ZIP_ER_NOZIP, 0);
return NULL;
}
/* check for end-of-central-dir magic */
if (memcmp(_zip_buffer_get(buffer, 4), EOCD_MAGIC, 4) != 0) {
zip_error_set(error, ZIP_ER_NOZIP, 0);
return NULL;
}
if (eocd_offset >= EOCD64LOCLEN && memcmp(_zip_buffer_data(buffer) + eocd_offset - EOCD64LOCLEN, EOCD64LOC_MAGIC, 4) == 0) {
_zip_buffer_set_offset(buffer, eocd_offset - EOCD64LOCLEN);
cd = _zip_read_eocd64(za->src, buffer, buf_offset, za->flags, error);
}
else {
_zip_buffer_set_offset(buffer, eocd_offset);
cd = _zip_read_eocd(buffer, buf_offset, za->flags, error);
}
if (cd == NULL)
return NULL;
_zip_buffer_set_offset(buffer, eocd_offset + 20);
comment_len = _zip_buffer_get_16(buffer);
if (cd->offset + cd->size > buf_offset + eocd_offset) {
/* cdir spans past EOCD record */
zip_error_set(error, ZIP_ER_INCONS, 0);
_zip_cdir_free(cd);
return NULL;
}
if (comment_len || (za->open_flags & ZIP_CHECKCONS)) {
zip_uint64_t tail_len;
_zip_buffer_set_offset(buffer, eocd_offset + EOCDLEN);
tail_len = _zip_buffer_left(buffer);
if (tail_len < comment_len || ((za->open_flags & ZIP_CHECKCONS) && tail_len != comment_len)) {
zip_error_set(error, ZIP_ER_INCONS, 0);
_zip_cdir_free(cd);
return NULL;
}
if (comment_len) {
if ((cd->comment=_zip_string_new(_zip_buffer_get(buffer, comment_len), comment_len, ZIP_FL_ENC_GUESS, error)) == NULL) {
_zip_cdir_free(cd);
return NULL;
}
}
}
if (cd->offset >= buf_offset) {
zip_uint8_t *data;
/* if buffer already read in, use it */
_zip_buffer_set_offset(buffer, cd->offset - buf_offset);
if ((data = _zip_buffer_get(buffer, cd->size)) == NULL) {
zip_error_set(error, ZIP_ER_INCONS, 0);
_zip_cdir_free(cd);
return NULL;
}
if ((cd_buffer = _zip_buffer_new(data, cd->size)) == NULL) {
zip_error_set(error, ZIP_ER_MEMORY, 0);
_zip_cdir_free(cd);
return NULL;
}
}
else {
cd_buffer = NULL;
if (zip_source_seek(za->src, (zip_int64_t)cd->offset, SEEK_SET) < 0) {
_zip_error_set_from_source(error, za->src);
_zip_cdir_free(cd);
return NULL;
}
/* possible consistency check: cd->offset = len-(cd->size+cd->comment_len+EOCDLEN) ? */
if (zip_source_tell(za->src) != (zip_int64_t)cd->offset) {
zip_error_set(error, ZIP_ER_NOZIP, 0);
_zip_cdir_free(cd);
return NULL;
}
}
left = (zip_uint64_t)cd->size;
i=0;
while (left > 0) {
bool grown = false;
zip_int64_t entry_size;
if (i == cd->nentry) {
/* InfoZIP has a hack to avoid using Zip64: it stores nentries % 0x10000 */
/* This hack isn't applicable if we're using Zip64, or if there is no central directory entry following. */
if (cd->is_zip64 || left < CDENTRYSIZE) {
break;
}
if (!_zip_cdir_grow(cd, 0x10000, error)) {
_zip_cdir_free(cd);
_zip_buffer_free(cd_buffer);
return NULL;
}
grown = true;
}
if ((cd->entry[i].orig=_zip_dirent_new()) == NULL || (entry_size = _zip_dirent_read(cd->entry[i].orig, za->src, cd_buffer, false, error)) < 0) {
if (grown && zip_error_code_zip(error) == ZIP_ER_NOZIP) {
zip_error_set(error, ZIP_ER_INCONS, 0);
}
_zip_cdir_free(cd);
_zip_buffer_free(cd_buffer);
return NULL;
}
i++;
left -= (zip_uint64_t)entry_size;
}
if (i != cd->nentry || left > 0) {
zip_error_set(error, ZIP_ER_INCONS, 0);
_zip_buffer_free(cd_buffer);
_zip_cdir_free(cd);
return NULL;
}
if (za->open_flags & ZIP_CHECKCONS) {
bool ok;
if (cd_buffer) {
ok = _zip_buffer_eof(cd_buffer);
}
else {
zip_int64_t offset = zip_source_tell(za->src);
if (offset < 0) {
_zip_error_set_from_source(error, za->src);
_zip_cdir_free(cd);
return NULL;
}
ok = ((zip_uint64_t)offset == cd->offset + cd->size);
}
if (!ok) {
zip_error_set(error, ZIP_ER_INCONS, 0);
_zip_buffer_free(cd_buffer);
_zip_cdir_free(cd);
return NULL;
}
}
_zip_buffer_free(cd_buffer);
return cd;
}
ZIP_EXTERN int
zip_close(struct zip *za)
{
int survivors;
int i, j, error;
char *temp;
FILE *out;
mode_t mask;
struct zip_cdir *cd;
struct zip_dirent de;
struct filelist *filelist;
int reopen_on_error;
int new_torrentzip;
reopen_on_error = 0;
if (za == NULL)
return -1;
if (!_zip_changed(za, &survivors)) {
_zip_free(za);
return 0;
}
/* don't create zip files with no entries */
if (survivors == 0) {
if (za->zn && za->zp) {
if (remove(za->zn) != 0) {
_zip_error_set(&za->error, ZIP_ER_REMOVE, errno);
return -1;
}
}
_zip_free(za);
return 0;
}
if ((filelist=(struct filelist *)malloc(sizeof(filelist[0])*survivors))
== NULL)
return -1;
if ((cd=_zip_cdir_new(survivors, &za->error)) == NULL) {
free(filelist);
return -1;
}
for (i=0; i<survivors; i++)
_zip_dirent_init(&cd->entry[i]);
/* archive comment is special for torrentzip */
if (zip_get_archive_flag(za, ZIP_AFL_TORRENT, 0)) {
cd->comment = (char*)_zip_memdup((void*)(TORRENT_SIG "XXXXXXXX"),
TORRENT_SIG_LEN + TORRENT_CRC_LEN,
&za->error);
if (cd->comment == NULL) {
_zip_cdir_free(cd);
free(filelist);
return -1;
}
cd->comment_len = TORRENT_SIG_LEN + TORRENT_CRC_LEN;
}
else if (zip_get_archive_flag(za, ZIP_AFL_TORRENT, ZIP_FL_UNCHANGED) == 0) {
if (_zip_cdir_set_comment(cd, za) == -1) {
_zip_cdir_free(cd);
free(filelist);
return -1;
}
}
if ((temp=_zip_create_temp_output(za, &out)) == NULL) {
_zip_cdir_free(cd);
free(filelist);
return -1;
}
/* create list of files with index into original archive */
for (i=j=0; i<za->nentry; i++) {
if (za->entry[i].state == ZIP_ST_DELETED)
continue;
filelist[j].idx = i;
filelist[j].name = zip_get_name(za, i, 0);
j++;
}
survivors = j;
if (zip_get_archive_flag(za, ZIP_AFL_TORRENT, 0))
qsort(filelist, survivors, sizeof(filelist[0]),
_zip_torrentzip_cmp);
new_torrentzip = (zip_get_archive_flag(za, ZIP_AFL_TORRENT, 0) == 1
&& zip_get_archive_flag(za, ZIP_AFL_TORRENT,
ZIP_FL_UNCHANGED) == 0);
error = 0;
for (j=0; j<survivors; j++) {
i = filelist[j].idx;
/* create new local directory entry */
if (ZIP_ENTRY_DATA_CHANGED(za->entry+i) || new_torrentzip) {
_zip_dirent_init(&de);
if (zip_get_archive_flag(za, ZIP_AFL_TORRENT, 0))
_zip_dirent_torrent_normalize(&de);
/* use it as central directory entry */
memcpy(cd->entry+j, &de, sizeof(cd->entry[j]));
/* set/update file name */
if (za->entry[i].ch_filename == NULL) {
if (za->entry[i].state == ZIP_ST_ADDED) {
de.filename = strdup("-");
de.filename_len = 1;
cd->entry[j].filename = "-";
cd->entry[j].filename_len = 1;
}
else {
de.filename = strdup(za->cdir->entry[i].filename);
de.filename_len = strlen(de.filename);
cd->entry[j].filename = za->cdir->entry[i].filename;
cd->entry[j].filename_len = de.filename_len;
}
}
}
else {
/* copy existing directory entries */
if (fseeko(za->zp, za->cdir->entry[i].offset, SEEK_SET) != 0) {
_zip_error_set(&za->error, ZIP_ER_SEEK, errno);
error = 1;
break;
}
if (_zip_dirent_read(&de, za->zp, NULL, NULL, 1,
&za->error) != 0) {
error = 1;
break;
}
memcpy(cd->entry+j, za->cdir->entry+i, sizeof(cd->entry[j]));
if (de.bitflags & ZIP_GPBF_DATA_DESCRIPTOR) {
de.crc = za->cdir->entry[i].crc;
de.comp_size = za->cdir->entry[i].comp_size;
de.uncomp_size = za->cdir->entry[i].uncomp_size;
de.bitflags &= ~ZIP_GPBF_DATA_DESCRIPTOR;
cd->entry[j].bitflags &= ~ZIP_GPBF_DATA_DESCRIPTOR;
}
}
if (za->entry[i].ch_filename) {
free(de.filename);
if ((de.filename=strdup(za->entry[i].ch_filename)) == NULL) {
error = 1;
break;
}
de.filename_len = strlen(de.filename);
cd->entry[j].filename = za->entry[i].ch_filename;
cd->entry[j].filename_len = de.filename_len;
}
if (zip_get_archive_flag(za, ZIP_AFL_TORRENT, 0) == 0
&& za->entry[i].ch_comment_len != -1) {
/* as the rest of cd entries, its malloc/free is done by za */
cd->entry[j].comment = za->entry[i].ch_comment;
cd->entry[j].comment_len = za->entry[i].ch_comment_len;
}
cd->entry[j].offset = (unsigned int)ftello(out);
if (ZIP_ENTRY_DATA_CHANGED(za->entry+i) || new_torrentzip) {
struct zip_source *zs;
zs = NULL;
if (!ZIP_ENTRY_DATA_CHANGED(za->entry+i)) {
if ((zs=zip_source_zip(za, za, i, ZIP_FL_RECOMPRESS, 0, -1))
== NULL) {
error = 1;
break;
}
}
if (add_data(za, zs ? zs : za->entry[i].source, &de, out) < 0) {
error = 1;
break;
}
cd->entry[j].last_mod = de.last_mod;
cd->entry[j].comp_method = de.comp_method;
cd->entry[j].comp_size = de.comp_size;
cd->entry[j].uncomp_size = de.uncomp_size;
cd->entry[j].crc = de.crc;
}
else {
if (_zip_dirent_write(&de, out, 1, &za->error) < 0) {
error = 1;
break;
}
/* we just read the local dirent, file is at correct position */
if (copy_data(za->zp, cd->entry[j].comp_size, out,
&za->error) < 0) {
error = 1;
break;
}
}
_zip_dirent_finalize(&de);
}
free(filelist);
if (!error) {
if (write_cdir(za, cd, out) < 0)
error = 1;
}
/* pointers in cd entries are owned by za */
cd->nentry = 0;
_zip_cdir_free(cd);
if (error) {
_zip_dirent_finalize(&de);
fclose(out);
remove(temp);
free(temp);
return -1;
}
if (fclose(out) != 0) {
_zip_error_set(&za->error, ZIP_ER_CLOSE, errno);
remove(temp);
free(temp);
return -1;
}
if (za->zp) {
fclose(za->zp);
za->zp = NULL;
reopen_on_error = 1;
}
if (_zip_rename(temp, za->zn) != 0) {
_zip_error_set(&za->error, ZIP_ER_RENAME, errno);
remove(temp);
free(temp);
if (reopen_on_error) {
/* ignore errors, since we're already in an error case */
za->zp = fopen(za->zn, "rb");
}
return -1;
}
#ifndef _MSC_VER
mask = umask(0);
umask(mask);
chmod(za->zn, 0666&~mask);
#endif
_zip_free(za);
free(temp);
return 0;
}
static struct zip_cdir *
_zip_readcdir(FILE *fp, off_t buf_offset, unsigned char *buf, unsigned char *eocd, int buflen,
int flags, struct zip_error *error)
{
struct zip_cdir *cd;
unsigned char *cdp, **bufp;
int i, comlen, nentry;
zip_uint32_t left;
comlen = buf + buflen - eocd - EOCDLEN;
if (comlen < 0) {
/* not enough bytes left for comment */
_zip_error_set(error, ZIP_ER_NOZIP, 0);
return NULL;
}
/* check for end-of-central-dir magic */
if (memcmp(eocd, EOCD_MAGIC, 4) != 0) {
_zip_error_set(error, ZIP_ER_NOZIP, 0);
return NULL;
}
if (memcmp(eocd+4, "\0\0\0\0", 4) != 0) {
_zip_error_set(error, ZIP_ER_MULTIDISK, 0);
return NULL;
}
cdp = eocd + 8;
/* number of cdir-entries on this disk */
i = _zip_read2(&cdp);
/* number of cdir-entries */
nentry = _zip_read2(&cdp);
if ((cd=_zip_cdir_new(nentry, error)) == NULL)
return NULL;
cd->size = _zip_read4(&cdp);
cd->offset = _zip_read4(&cdp);
cd->comment = NULL;
cd->comment_len = _zip_read2(&cdp);
/* without checking the ZIP_CHECKCONS flag we'll not able even to open inconsistent
archives at this place, which would break bc in PHP */
if ((ZIP_CHECKCONS == (flags & ZIP_CHECKCONS)) && ((zip_uint64_t)cd->offset)+cd->size > buf_offset + (eocd-buf)) {
/* cdir spans past EOCD record */
_zip_error_set(error, ZIP_ER_INCONS, 0);
cd->nentry = 0;
_zip_cdir_free(cd);
return NULL;
}
if ((comlen < cd->comment_len) || (cd->nentry != i)) {
_zip_error_set(error, ZIP_ER_NOZIP, 0);
cd->nentry = 0;
_zip_cdir_free(cd);
return NULL;
}
if ((flags & ZIP_CHECKCONS) && comlen != cd->comment_len) {
_zip_error_set(error, ZIP_ER_INCONS, 0);
cd->nentry = 0;
_zip_cdir_free(cd);
return NULL;
}
if (cd->comment_len) {
if ((cd->comment=(char *)_zip_memdup(eocd+EOCDLEN,
cd->comment_len, error))
== NULL) {
cd->nentry = 0;
_zip_cdir_free(cd);
return NULL;
}
}
/* the first if branch goes the old way of libzip 0.9 so we don't loose
the bc for reading inconsistent files */
if ((ZIP_CHECKCONS != (flags & ZIP_CHECKCONS)) && cd->size < (unsigned int)(eocd-buf)) {
cdp = eocd - cd->size;
bufp = &cdp;
}
else if (cd->offset >= buf_offset) {
/* if buffer already read in, use it */
cdp = buf + (cd->offset - buf_offset);
bufp = &cdp;
}
else {
/* go to start of cdir and read it entry by entry */
bufp = NULL;
clearerr(fp);
fseeko(fp, cd->offset, SEEK_SET);
/* possible consistency check: cd->offset =
len-(cd->size+cd->comment_len+EOCDLEN) ? */
if (ferror(fp) || ((unsigned long)ftello(fp) != cd->offset)) {
/* seek error or offset of cdir wrong */
if (ferror(fp))
_zip_error_set(error, ZIP_ER_SEEK, errno);
else
_zip_error_set(error, ZIP_ER_NOZIP, 0);
cd->nentry = 0;
_zip_cdir_free(cd);
return NULL;
}
}
left = cd->size;
i=0;
while (i<cd->nentry && left > 0) {
if ((_zip_dirent_read(cd->entry+i, fp, bufp, &left, 0, error)) < 0) {
cd->nentry = i;
_zip_cdir_free(cd);
return NULL;
}
i++;
if (i == cd->nentry && left > 0) {
/* Infozip extension for more than 64k entries:
nentries wraps around, size indicates correct EOCD */
if (_zip_cdir_grow(cd, cd->nentry+ZIP_UINT16_MAX, error) < 0) {
cd->nentry = i;
_zip_cdir_free(cd);
return NULL;
}
}
}
cd->nentry = i;
return cd;
}
static zip_cdir_t *
_zip_read_cdir(zip_t *za, zip_buffer_t *buffer, zip_uint64_t buf_offset, zip_error_t *error)
{
zip_cdir_t *cd;
zip_uint16_t comment_len;
zip_uint64_t i, left;
zip_uint64_t eocd_offset = _zip_buffer_offset(buffer);
zip_buffer_t *cd_buffer;
if (_zip_buffer_left(buffer) < EOCDLEN) {
/* not enough bytes left for comment */
zip_error_set(error, ZIP_ER_NOZIP, 0);
return NULL;
}
/* check for end-of-central-dir magic */
if (memcmp(_zip_buffer_get(buffer, 4), EOCD_MAGIC, 4) != 0) {
zip_error_set(error, ZIP_ER_NOZIP, 0);
return NULL;
}
if (_zip_buffer_get_32(buffer) != 0) {
zip_error_set(error, ZIP_ER_MULTIDISK, 0);
return NULL;
}
if (eocd_offset >= EOCD64LOCLEN && memcmp(_zip_buffer_data(buffer) + eocd_offset - EOCD64LOCLEN, EOCD64LOC_MAGIC, 4) == 0) {
_zip_buffer_set_offset(buffer, eocd_offset - EOCD64LOCLEN);
cd = _zip_read_eocd64(za->src, buffer, buf_offset, za->flags, error);
}
else {
_zip_buffer_set_offset(buffer, eocd_offset);
cd = _zip_read_eocd(buffer, buf_offset, za->flags, error);
}
if (cd == NULL)
return NULL;
_zip_buffer_set_offset(buffer, eocd_offset + 20);
comment_len = _zip_buffer_get_16(buffer);
if (cd->offset + cd->size > buf_offset + eocd_offset) {
/* cdir spans past EOCD record */
zip_error_set(error, ZIP_ER_INCONS, 0);
_zip_cdir_free(cd);
return NULL;
}
if (comment_len || (za->open_flags & ZIP_CHECKCONS)) {
zip_uint64_t tail_len;
_zip_buffer_set_offset(buffer, eocd_offset + EOCDLEN);
tail_len = _zip_buffer_left(buffer);
if (tail_len < comment_len || ((za->open_flags & ZIP_CHECKCONS) && tail_len != comment_len)) {
zip_error_set(error, ZIP_ER_INCONS, 0);
_zip_cdir_free(cd);
return NULL;
}
if (comment_len) {
if ((cd->comment=_zip_string_new(_zip_buffer_get(buffer, comment_len), comment_len, ZIP_FL_ENC_GUESS, error)) == NULL) {
_zip_cdir_free(cd);
return NULL;
}
}
}
if (cd->offset >= buf_offset) {
zip_uint8_t *data;
/* if buffer already read in, use it */
_zip_buffer_set_offset(buffer, cd->offset - buf_offset);
if ((data = _zip_buffer_get(buffer, cd->size)) == NULL) {
zip_error_set(error, ZIP_ER_INCONS, 0);
_zip_cdir_free(cd);
return NULL;
}
if ((cd_buffer = _zip_buffer_new(data, cd->size)) == NULL) {
zip_error_set(error, ZIP_ER_MEMORY, 0);
_zip_cdir_free(cd);
return NULL;
}
}
else {
cd_buffer = NULL;
if (zip_source_seek(za->src, (zip_int64_t)cd->offset, SEEK_SET) < 0) {
_zip_error_set_from_source(error, za->src);
_zip_cdir_free(cd);
return NULL;
}
/* possible consistency check: cd->offset = len-(cd->size+cd->comment_len+EOCDLEN) ? */
if (zip_source_tell(za->src) != (zip_int64_t)cd->offset) {
zip_error_set(error, ZIP_ER_NOZIP, 0);
_zip_cdir_free(cd);
return NULL;
}
}
left = (zip_uint64_t)cd->size;
i=0;
while (i<cd->nentry && left > 0) {
zip_int64_t entry_size;
if ((cd->entry[i].orig=_zip_dirent_new()) == NULL || (entry_size = _zip_dirent_read(cd->entry[i].orig, za->src, cd_buffer, false, error)) < 0) {
_zip_cdir_free(cd);
_zip_buffer_free(cd_buffer);
return NULL;
}
i++;
left -= (zip_uint64_t)entry_size;
}
if (i != cd->nentry) {
zip_error_set(error, ZIP_ER_INCONS, 0);
_zip_buffer_free(cd_buffer);
_zip_cdir_free(cd);
return NULL;
}
if (za->open_flags & ZIP_CHECKCONS) {
bool ok;
if (cd_buffer) {
ok = _zip_buffer_eof(cd_buffer);
}
else {
zip_int64_t offset = zip_source_tell(za->src);
if (offset < 0) {
_zip_error_set_from_source(error, za->src);
_zip_buffer_free(cd_buffer);
_zip_cdir_free(cd);
return NULL;
}
ok = ((zip_uint64_t)offset == cd->offset + cd->size);
}
if (!ok) {
zip_error_set(error, ZIP_ER_INCONS, 0);
_zip_buffer_free(cd_buffer);
_zip_cdir_free(cd);
return NULL;
}
}
_zip_buffer_free(cd_buffer);
return cd;
}
int
zip_close(struct zip *za)
{
int changed, survivors;
int i, j, tfd, error;
char *temp;
FILE *tfp;
mode_t mask;
struct zip_cdir *cd;
struct zip_dirent de;
changed = survivors = 0;
for (i=0; i<za->nentry; i++) {
if (za->entry[i].state != ZIP_ST_UNCHANGED)
changed = 1;
if (za->entry[i].state != ZIP_ST_DELETED)
survivors++;
}
if (!changed) {
_zip_free(za);
return 0;
}
/* don't create zip files with no entries */
if (survivors == 0) {
if (za->zn) {
if (remove(za->zn) != 0) {
_zip_error_set(&za->error, ZIP_ER_REMOVE, errno);
return -1;
}
}
_zip_free(za);
return 0;
}
if ((cd=_zip_cdir_new(survivors, &za->error)) == NULL)
return -1;
if ((temp=malloc(strlen(za->zn)+8)) == NULL) {
_zip_error_set(&za->error, ZIP_ER_MEMORY, 0);
_zip_cdir_free(cd);
return -1;
}
sprintf(temp, "%s.XXXXXX", za->zn);
if ((tfd=mkstemp(temp)) == -1) {
_zip_error_set(&za->error, ZIP_ER_TMPOPEN, errno);
_zip_cdir_free(cd);
free(temp);
return -1;
}
if ((tfp=fdopen(tfd, "r+b")) == NULL) {
_zip_error_set(&za->error, ZIP_ER_TMPOPEN, errno);
_zip_cdir_free(cd);
close(tfd);
remove(temp);
free(temp);
return -1;
}
error = 0;
for (i=j=0; i<za->nentry; i++) {
if (za->entry[i].state == ZIP_ST_DELETED)
continue;
if (ZIP_ENTRY_DATA_CHANGED(za->entry+i)) {
_zip_dirent_init(&de);
memcpy(cd->entry+j, &de, sizeof(cd->entry[i]));
if (za->entry[i].ch_filename == NULL) {
if (za->entry[i].state == ZIP_ST_REPLACED) {
de.filename = strdup(za->cdir->entry[i].filename);
de.filename_len = strlen(de.filename);
cd->entry[j].filename = za->cdir->entry[i].filename;
cd->entry[j].filename_len = de.filename_len;
}
else {
de.filename = strdup("-");
de.filename_len = 1;
cd->entry[j].filename = "-";
cd->entry[j].filename_len = de.filename_len;
}
}
}
else {
if (fseek(za->zp, za->cdir->entry[i].offset, SEEK_SET) != 0) {
_zip_error_set(&za->error, ZIP_ER_SEEK, errno);
error = 1;
break;
}
if (_zip_dirent_read(&de, za->zp, NULL, 0, 1, &za->error) != 0) {
error = 1;
break;
}
memcpy(cd->entry+j, za->cdir->entry+i, sizeof(cd->entry[i]));
}
if (za->entry[i].ch_filename) {
free(de.filename);
de.filename = strdup(za->entry[i].ch_filename);
de.filename_len = strlen(de.filename);
cd->entry[j].filename = za->entry[i].ch_filename;
cd->entry[j].filename_len = de.filename_len;
}
cd->entry[j].offset = ftell(tfp);
if (ZIP_ENTRY_DATA_CHANGED(za->entry+i)) {
if (add_data(za, i, &de, tfp) < 0) {
error = -1;
break;
}
cd->entry[j].last_mod = de.last_mod;
cd->entry[j].comp_method = de.comp_method;
cd->entry[j].comp_size = de.comp_size;
cd->entry[j].uncomp_size = de.uncomp_size;
cd->entry[j].crc = de.crc;
}
else {
if (_zip_dirent_write(&de, tfp, 1, &za->error) < 0) {
error = 1;
break;
}
/* we just read the local dirent, file is at correct position */
if (copy_data(za->zp, de.comp_size, tfp, &za->error) < 0) {
error = 1;
break;
}
}
j++;
_zip_dirent_finalize(&de);
}
if (!error) {
if (_zip_cdir_write(cd, tfp, &za->error) < 0)
error = 1;
}
/* pointers in cd are owned by za */
cd->nentry = 0;
_zip_cdir_free(cd);
if (error) {
_zip_dirent_finalize(&de);
fclose(tfp);
remove(temp);
free(temp);
return -1;
}
if (fclose(tfp) != 0) {
_zip_error_set(&za->error, ZIP_ER_CLOSE, errno);
remove(temp);
free(temp);
return -1;
}
if (rename(temp, za->zn) != 0) {
_zip_error_set(&za->error, ZIP_ER_RENAME, errno);
remove(temp);
free(temp);
return -1;
}
if (za->zp) {
fclose(za->zp);
za->zp = NULL;
}
mask = umask(0);
umask(mask);
chmod(za->zn, 0666&~mask);
_zip_free(za);
return 0;
}
ZIP_EXTERN struct zip *
zip_open(const char *fn, int flags, int *zep)
{
FILE *fp;
struct zip *za;
struct zip_cdir *cdir;
int i;
off_t len;
switch (_zip_file_exists(fn, flags, zep)) {
case -1:
return NULL;
case 0:
return _zip_allocate_new(fn, zep);
default:
break;
}
if ((fp=fopen(fn, "rb")) == NULL) {
set_error(zep, NULL, ZIP_ER_OPEN);
return NULL;
}
__android_log_print(ANDROID_LOG_VERBOSE, "ZIP", "FILE OPENED");
fseeko(fp, 0, SEEK_END);
len = ftello(fp);
/* treat empty files as empty archives */
if (len == 0) {
if ((za=_zip_allocate_new(fn, zep)) == NULL)
fclose(fp);
else
za->zp = fp;
return za;
}
__android_log_print(ANDROID_LOG_VERBOSE, "ZIP", "SCANNING");
cdir = _zip_find_central_dir(fp, flags, zep, len);
if (cdir == NULL) {
fclose(fp);
return NULL;
}
__android_log_print(ANDROID_LOG_VERBOSE, "ZIP", "DIR FOUND");
if ((za=_zip_allocate_new(fn, zep)) == NULL) {
_zip_cdir_free(cdir);
fclose(fp);
return NULL;
}
za->cdir = cdir;
za->zp = fp;
__android_log_print(ANDROID_LOG_VERBOSE, "ZIP", "ALLOCING ENTRIES");
if ((za->entry=(struct zip_entry *)malloc(sizeof(*(za->entry))
* cdir->nentry)) == NULL) {
set_error(zep, NULL, ZIP_ER_MEMORY);
_zip_free(za);
return NULL;
}
za->nentry_alloc = cdir->nentry;
__android_log_print(ANDROID_LOG_VERBOSE, "ZIP", "FILLING ENTRIES");
for (i=0; i<cdir->nentry; i++)
_zip_entry_new2(za);
__android_log_print(ANDROID_LOG_VERBOSE, "ZIP", "CHECK TORRENTZIP");
_zip_check_torrentzip(za);
za->ch_flags = za->flags;
__android_log_print(ANDROID_LOG_VERBOSE, "ZIP", "DONE");
return za;
}
