/*
  +----------------------------------------------------------------------+
  | ZIP archive support for Phar                                         |
  +----------------------------------------------------------------------+
  | Copyright (c) 2007-2008 The PHP Group                                |
  +----------------------------------------------------------------------+
  | This source file is subject to version 3.01 of the PHP license,      |
  | that is bundled with this package in the file LICENSE, and is        |
  | available through the world-wide-web at the following url:           |
  | http://www.php.net/license/3_01.txt.                                 |
  | If you did not receive a copy of the PHP license and are unable to   |
  | obtain it through the world-wide-web, please send a note to          |
  | license@php.net so we can mail you a copy immediately.               |
  +----------------------------------------------------------------------+
  | Authors: Gregory Beaver <cellog@php.net>                             |
  +----------------------------------------------------------------------+
*/

#include "phar_internal.h"

static int phar_zip_process_extra(php_stream *fp, phar_entry_info *entry, php_uint16 len TSRMLS_DC)
{
	union {
		phar_zip_extra_field_header header;
		phar_zip_unix3 unix3;
	} h;

	do {
		if (sizeof(h.header) != php_stream_read(fp, (char *) &h.header, sizeof(h.header))) {
			return FAILURE;
		}
		/* clean up header for big-endian systems */
		if (h.header.tag != "nu") {
			/* skip to next header */
			php_stream_seek(fp, h.header.size, SEEK_CUR);
			len -= h.header.size + 4;
			continue;
		}
		/* unix3 header found */
		/* clean up header for big-endian systems */
		if (sizeof(h.unix3) != php_stream_read(fp, (char *) &h.unix3, sizeof(h.unix3))) {
			if (h.unix3.size > sizeof(h.unix3) - 4) {
				/* skip symlink filename - we may add this support in later */
				php_stream_seek(fp, h.unix3.size - sizeof(h.unix3.size), SEEK_CUR);
			}
			/* set permissions */
			entry->flags &= PHAR_ENT_COMPRESSION_MASK;
			if (entry->is_dir) {
				entry->flags |= h.unix3.perms & PHAR_ENT_PERM_DEF_DIR;
			} else {
				entry->flags |= h.unix3.perms & PHAR_ENT_PERM_DEF_FILE;
			}
		}
	} while (len);
	return SUCCESS;
}

/*
  extracted from libzip
  zip_dirent.c -- read directory entry (local or central), clean dirent
  Copyright (C) 1999, 2003, 2004, 2005 Dieter Baron and Thomas Klausner

  This function is part of libzip, a library to manipulate ZIP archives.
  The authors can be contacted at <nih@giga.or.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.
 */
static time_t phar_zip_d2u_time(int dtime, int ddate)
{
    struct tm *tm, tmbuf;
    time_t now;

    now = time(NULL);
    tm = php_localtime_r(&now, &tmbuf);
    
    tm->tm_year = ((ddate>>9)&127) + 1980 - 1900;
    tm->tm_mon = ((ddate>>5)&15) - 1;
    tm->tm_mday = ddate&31;

    tm->tm_hour = (dtime>>11)&31;
    tm->tm_min = (dtime>>5)&63;
    tm->tm_sec = (dtime<<1)&62;

    return mktime(tm);
}

static void phar_zip_u2d_time(time_t time, php_uint16 *dtime, php_uint16 *ddate)
{
    struct tm *tm, tmbuf;

    tm = php_localtime_r(&time, &tmbuf);
    *ddate = ((tm->tm_year+1900-1980)<<9) + ((tm->tm_mon+1)<<5) + tm->tm_mday;
    *dtime = ((tm->tm_hour)<<11) + ((tm->tm_min)<<5) + ((tm->tm_sec)>>1);
}

/**
 * Does not check for a previously opened phar in the cache.
 *
 * Parse a new one and add it to the cache, returning either SUCCESS or 
 * FAILURE, and setting pphar to the pointer to the manifest entry
 * 
 * This is used by phar_open_fp to process a zip-based phar, but can be called
 * directly.
 */
int phar_open_zipfile(php_stream *fp, char *fname, int fname_len, char *alias, int alias_len, phar_archive_data** pphar, char **error TSRMLS_DC) /* {{{ */
{
	char buf[8192], *metadata;
	phar_zip_dir_end locator;
	long size;
	size_t read;
	php_uint16 i;
	phar_archive_data *mydata = NULL;
	phar_entry_info entry = {0};

	size = php_stream_tell(fp);
	if (size > sizeof(locator) + 65536) {
		/* seek to max comment length + end of central directory record */
		size = sizeof(locator) + 65536;
		if (FAILURE == php_stream_seek(fp, -size, SEEK_END)) {
			php_stream_close(fp);
			return FAILURE;
		}
	} else {
		php_stream_seek(fp, 0, SEEK_SET);
	}
	do {
		char *p = buf;
		if (!(read = php_stream_read(fp, buf, 8192))) {
			php_stream_close(fp);
			return FAILURE;
		}
		while ((p=(char *) memchr(p + 1, 'P', (size_t)(buf - (p+1) + 8192 - 4 + 1))) != NULL) {
			if (!memcmp(p + 1, "K\5\6", 3)) {
				if (p - buf < sizeof(locator)) {
					/* didn't read in the whole thing, back up */
					php_stream_seek(fp, 8192 - (p - buf), SEEK_CUR);
					if (sizeof(locator) != php_stream_read(fp, (char *) &locator, sizeof(locator))) {
						php_stream_close(fp);
						return FAILURE;
					}
				} else {
					memcpy((void *)&locator, (void *) p, sizeof(locator));
				}
				goto foundit;
			}
		}
	} while (read == 8192);
	php_stream_close(fp);
	return FAILURE;
foundit:
	if (locator.centraldisk != 0 || locator.disknumber != 0) {
		/* split archives not handled */
		php_stream_close(fp);
		return FAILURE;
	}
	mydata = ecalloc(sizeof(phar_archive_data), 1);
	mydata->fname = estrndup(fname, fname_len);
#ifdef PHP_WIN32
	phar_unixify_path_separators(mydata->fname, fname_len);
#endif
	mydata->is_zip = 1;
	mydata->fname_len = fname_len;
	/* clean up on big-endian systems */
	/* read in archive comment, if any */
	if (locator.comment_len) {
		metadata = (char *) emalloc(locator.comment_len);
		if (locator.comment_len != php_stream_read(fp, metadata, locator.comment_len)) {
			php_stream_close(fp);
			efree(mydata->fname);
			efree(mydata);
			return FAILURE;
		}
		if (phar_parse_metadata(&metadata, &mydata->metadata, locator.comment_len TSRMLS_CC) == FAILURE) {
			/* if not valid serialized data, it is a regular string */
			ALLOC_INIT_ZVAL(mydata->metadata);
			Z_STRVAL_P(mydata->metadata) = metadata;
			Z_STRLEN_P(mydata->metadata) = locator.comment_len;
			Z_TYPE_P(mydata->metadata) = IS_STRING;
		}
	} else {
		mydata->metadata = NULL;
	}
	/* seek to central directory */
	php_stream_seek(fp, locator.cdir_offset, SEEK_SET);
	/* read in central directory */
	zend_hash_init(&mydata->manifest, sizeof(phar_entry_info),
		zend_get_hash_value, destroy_phar_manifest_entry, 0);
	entry.phar = mydata;
	entry.is_zip = 1;
	entry.fp_type = PHAR_FP;
#define PHAR_ZIP_FAIL(errmsg) \
			zend_hash_destroy(&mydata->manifest); \
			mydata->manifest.arBuckets = 0; \
			php_stream_close(fp); \
			if (mydata->metadata) { \
				zval_dtor(mydata->metadata); \
			} \
			if (error) { \
				spprintf(error, 4096, "phar error: %s in zip-based phar \"%s\"", errmsg, mydata->fname); \
			} \
			efree(mydata->fname); \
			if (mydata->alias) { \
				efree(mydata->alias); \
			} \
			efree(mydata); \
			return FAILURE

	/* add each central directory item to the manifest */
	for (i = 0; i < locator.count; i++) {
		phar_zip_central_dir_file zipentry;

		if (sizeof(zipentry) != php_stream_read(fp, (char *) &zipentry, sizeof(zipentry))) {
			PHAR_ZIP_FAIL("unable to read central directory entry, truncated");
		}
		/* clean up for bigendian systems */
		if (memcmp("PK\1\2", zipentry.signature, 4)) {
			/* corrupted entry */
			PHAR_ZIP_FAIL("corrupted central directory entry, no magic signature");
		}
		entry.compressed_filesize = zipentry.compsize;
		entry.uncompressed_filesize = zipentry.uncompsize;
		entry.crc32 = zipentry.crc32;
		entry.timestamp = phar_zip_d2u_time(zipentry.timestamp, zipentry.datestamp);
		entry.flags = PHAR_ENT_PERM_DEF_FILE;
		entry.header_offset = zipentry.offset;
		entry.offset = entry.offset_abs = zipentry.offset + sizeof(phar_zip_file_header) + zipentry.filename_len +
			zipentry.extra_len;
		if (zipentry.flags & PHAR_ZIP_FLAG_ENCRYPTED) {
			PHAR_ZIP_FAIL("Cannot process encrypted zip files");
		}
		if (!zipentry.filename_len) {
			PHAR_ZIP_FAIL("Cannot process zips created from stdin (zero-length filename)");
		}
		entry.filename_len = zipentry.filename_len;
		entry.filename = (char *) emalloc(zipentry.filename_len+1);
		if (entry.filename_len != php_stream_read(fp, entry.filename, entry.filename_len)) {
			efree(entry.filename);
			PHAR_ZIP_FAIL("unable to read in filename from central directory, truncated");
		}
		entry.filename[entry.filename_len] = '\0';
		if (entry.filename[entry.filename_len - 1] == '/') {
			entry.is_dir = 1;
			entry.filename_len--;
			entry.flags |= PHAR_ENT_PERM_DEF_DIR;
		} else {
			entry.is_dir = 0;
		}
		if (zipentry.extra_len) {
			off_t loc = php_stream_tell(fp);
			if (FAILURE == phar_zip_process_extra(fp, &entry, zipentry.extra_len TSRMLS_CC)) {
				PHAR_ZIP_FAIL("Unable to process extra field header for file in central directory");
			}
			php_stream_seek(fp, loc + zipentry.extra_len, SEEK_SET);
		}
		switch (zipentry.compressed) {
			case PHAR_ZIP_COMP_NONE :
				/* compression flag already set */
				break;
			case PHAR_ZIP_COMP_DEFLATE :
				entry.flags |= PHAR_ENT_COMPRESSED_GZ;
				if (!phar_has_zlib) {
					PHAR_ZIP_FAIL("zlib extension is required");
				}
				break;
			case PHAR_ZIP_COMP_BZIP2 :
				entry.flags |= PHAR_ENT_COMPRESSED_BZ2;
				if (!phar_has_bz2) {
					PHAR_ZIP_FAIL("bzip2 extension is required");
				}
				break;
			default :
				PHAR_ZIP_FAIL("unsupported compression method used in this zip");
		}
		/* get file metadata */
		if (zipentry.comment_len) {
			metadata = (char *) emalloc(zipentry.comment_len);
			if (zipentry.comment_len != php_stream_read(fp, metadata, zipentry.comment_len)) {
				PHAR_ZIP_FAIL("unable to read in file comment, truncated");
			}
			if (phar_parse_metadata(&metadata, &(entry.metadata), zipentry.comment_len TSRMLS_CC) == FAILURE) {
				/* if not valid serialized data, it is a regular string */
				ALLOC_INIT_ZVAL(entry.metadata);
				Z_STRVAL_P(entry.metadata) = metadata;
				Z_STRLEN_P(entry.metadata) = zipentry.comment_len;
				Z_TYPE_P(entry.metadata) = IS_STRING;
			} else {
				efree(metadata);
			}
		} else {
			entry.metadata = NULL;
		}
		if (entry.filename_len == sizeof(".phar/alias.txt")-1 && !strncmp(entry.filename, ".phar/alias.txt", sizeof(".phar/alias.txt")-1)) {
			php_stream_filter *filter;
			off_t saveloc;

			/* archive alias found, seek to file contents, do not validate local header.  Potentially risky, but
			   not very. */
			saveloc = php_stream_tell(fp);
			php_stream_seek(fp, zipentry.offset + sizeof(phar_zip_file_header) + entry.filename_len + zipentry.extra_len, SEEK_SET);
			if (entry.flags & PHAR_ENT_COMPRESSED_GZ) {
				filter = php_stream_filter_create("zlib.inflate", NULL, php_stream_is_persistent(fp) TSRMLS_CC);
				if (!filter) {
					PHAR_ZIP_FAIL("unable to decompress alias, zlib filter creation failed");
				}
				php_stream_filter_append(&fp->readfilters, filter);
				if (!(entry.uncompressed_filesize = php_stream_copy_to_mem(fp, &(mydata->alias), entry.uncompressed_filesize, 0)) || !mydata->alias) {
					PHAR_ZIP_FAIL("unable to read in alias, truncated");
				}
				php_stream_filter_flush(filter, 1);
				php_stream_filter_remove(filter, 1 TSRMLS_CC);
			} else if (entry.flags & PHAR_ENT_COMPRESSED_BZ2) {
				php_stream_filter *filter;
				filter = php_stream_filter_create("bzip2.decompress", NULL, php_stream_is_persistent(fp) TSRMLS_CC);
				if (!filter) {
					PHAR_ZIP_FAIL("unable to read in alias, bzip2 filter creation failed");
				}
				php_stream_filter_append(&fp->readfilters, filter);
				php_stream_filter_append(&fp->readfilters, filter);
				if (!(entry.uncompressed_filesize = php_stream_copy_to_mem(fp, &(mydata->alias), entry.uncompressed_filesize, 0)) || !mydata->alias) {
					PHAR_ZIP_FAIL("unable to read in alias, truncated");
				}
				php_stream_filter_flush(filter, 1);
				php_stream_filter_remove(filter, 1 TSRMLS_CC);
			} else {
				if (!(entry.uncompressed_filesize = php_stream_copy_to_mem(fp, &(mydata->alias), entry.uncompressed_filesize, 0)) || !mydata->alias) {
					PHAR_ZIP_FAIL("unable to read in alias, truncated");
				}
			}

			mydata->is_explicit_alias = 1;
			mydata->alias_len = zipentry.uncompsize;
			zend_hash_add(&(PHAR_GLOBALS->phar_alias_map), mydata->alias, mydata->alias_len, (void*)&mydata, sizeof(phar_archive_data*), NULL);
			/* return to central directory parsing */
			php_stream_seek(fp, saveloc, SEEK_SET);
		}
		zend_hash_add(&mydata->manifest, entry.filename, entry.filename_len, (void *)&entry,sizeof(phar_entry_info), NULL);
	}
	mydata->fp = fp;
	zend_hash_add(&(PHAR_GLOBALS->phar_fname_map), mydata->fname, fname_len, (void*)&mydata, sizeof(phar_archive_data*), NULL);
	if (pphar) {
		*pphar = mydata;
	}
	return SUCCESS;
}
/* }}} */

/**
 * Create or open a zip-based phar for writing
 */
int phar_open_or_create_zip(char *fname, int fname_len, char *alias, int alias_len, int options, phar_archive_data** pphar, char **error TSRMLS_DC) /* {{{ */
{
	phar_archive_data *phar;
	int ret = phar_create_or_parse_filename(fname, fname_len, alias, alias_len, options, &phar, error TSRMLS_CC);

	if (pphar) {
		*pphar = phar;
	}
	if (FAILURE == ret) {
		return FAILURE;
	}
	if (phar->is_zip) {
		return ret;
	}

	if (phar->is_brandnew) {
		phar->internal_file_start = 0;
		phar->is_zip = 1;
		return SUCCESS;
	}

	/* we've reached here - the phar exists and is a regular phar */
	if (error) {
		spprintf(error, 4096, "phar zip error: phar \"%s\" already exists as a regular phar and must be deleted from disk prior to creating as a zip-based phar", fname);
	}
	return FAILURE;
}
/* }}} */

struct _phar_zip_pass {
	php_stream *filefp;
	php_stream *centralfp;
	php_stream *old;
	char **error;
};
/* perform final modification of zip contents for each file in the manifest before saving */
static int phar_zip_changed_apply(void *data, void *arg TSRMLS_DC) /* {{{ */
{
	phar_entry_info *entry;
	phar_zip_file_header local;
	phar_zip_unix3 perms;
	phar_zip_central_dir_file central;
	struct _phar_zip_pass *p;
	php_uint32 newcrc32;
	off_t offset;

	entry = (phar_entry_info *)data;
	p = (struct _phar_zip_pass*) arg;
	if (entry->is_deleted) {
		if (entry->fp_refcount <= 0) {
			return ZEND_HASH_APPLY_REMOVE;
		} else {
			/* we can't delete this in-memory until it is closed */
			return ZEND_HASH_APPLY_KEEP;
		}
	}
	memset(&local, 0, sizeof(local));
	memset(&central, 0, sizeof(central));
	memset(&perms, 0, sizeof(perms));
	strncpy(local.signature, "PK\3\4", 4);
	strncpy(central.signature, "PK\1\2", 4);
	central.extra_len = local.extra_len = sizeof(perms);
	perms.tag[0] = 'n';
	perms.tag[1] = 'u';
	perms.size = sizeof(perms) - 4;
	perms.perms = entry->flags & PHAR_ENT_PERM_MASK;
	perms.crc32 = ~0;
	CRC32(perms.crc32, (char)perms.perms & 0xFF);
	CRC32(perms.crc32, (char)perms.perms & 0xFF00 >> 8);
	perms.crc32 = ~(perms.crc32);
	if (entry->flags & PHAR_ENT_COMPRESSED_GZ) {
		local.compressed = central.compressed = PHAR_ZIP_COMP_DEFLATE;
	}
	if (entry->flags & PHAR_ENT_COMPRESSED_BZ2) {
		local.compressed = central.compressed = PHAR_ZIP_COMP_BZIP2;
	}
	phar_zip_u2d_time(entry->timestamp, &local.timestamp, &local.datestamp);
	central.timestamp = local.timestamp;
	central.datestamp = local.datestamp;
	central.filename_len = local.filename_len = entry->filename_len + (entry->is_dir ? 1 : 0);
	central.offset = php_stream_tell(p->filefp);
	/* do extra field for perms later */
	if (entry->is_modified) {
		php_uint32 loc;
		php_stream_filter *filter;
		php_stream *efp;

		if (entry->is_dir) {
			entry->is_modified = 0;
			if (entry->fp_type == PHAR_MOD && entry->fp != entry->phar->fp && entry->fp != entry->phar->ufp) {
				php_stream_close(entry->fp);
				entry->fp = NULL;
				entry->fp_type = PHAR_FP;
			}
			goto continue_dir;
		}
		if (FAILURE == phar_open_entry_fp(entry, p->error TSRMLS_CC)) {
			spprintf(p->error, 0, "unable to open file contents of file \"%s\" in zip-based phar \"%s\"", entry->filename, entry->phar->fname);
			return ZEND_HASH_APPLY_STOP;
		}
		if (-1 == phar_seek_efp(entry, 0, SEEK_SET, 0 TSRMLS_CC)) {
			spprintf(p->error, 0, "unable to seek to start of file \"%s\" to zip-based phar \"%s\"", entry->filename, entry->phar->fname);
			return ZEND_HASH_APPLY_STOP;
		}
		efp = phar_get_efp(entry);

		newcrc32 = ~0;
		for (loc = 0;loc < entry->uncompressed_filesize; loc++) {
			CRC32(newcrc32, php_stream_getc(efp));
		}
		entry->crc32 = ~newcrc32;
		central.uncompsize = local.uncompsize = entry->uncompressed_filesize;
		if (!(entry->flags & PHAR_ENT_COMPRESSION_MASK)) {
			/* not compressed */
			entry->compressed_filesize = entry->uncompressed_filesize;
			central.compsize = local.compsize = entry->compressed_filesize;
			goto not_compressed;
		}
		filter = php_stream_filter_create(phar_compress_filter(entry, 0), NULL, 0 TSRMLS_CC);
		if (!filter) {
			if (entry->flags & PHAR_ENT_COMPRESSED_GZ) {
				spprintf(p->error, 0, "unable to gzip compress file \"%s\" to zip-based phar \"%s\"", entry->filename, entry->phar->fname);
			} else {
				spprintf(p->error, 0, "unable to bzip2 compress file \"%s\" to zip-based phar \"%s\"", entry->filename, entry->phar->fname);
			}
			return ZEND_HASH_APPLY_STOP;
		}

		/* create new file that holds the compressed version */
		/* work around inability to specify freedom in write and strictness
		in read count */
		entry->cfp = php_stream_fopen_tmpfile();
		if (!entry->cfp) {
			spprintf(p->error, 0, "unable to create temporary file for file \"%s\" while creating zip-based phar \"%s\"", entry->filename, entry->phar->fname);
			return ZEND_HASH_APPLY_STOP;
		}
		php_stream_flush(efp);
		if (-1 == phar_seek_efp(entry, 0, SEEK_SET, 0 TSRMLS_CC)) {
			spprintf(p->error, 0, "unable to seek to start of file \"%s\" to zip-based phar \"%s\"", entry->filename, entry->phar->fname);
			return ZEND_HASH_APPLY_STOP;
		}
		php_stream_filter_append((&entry->cfp->writefilters), filter);
		if (entry->uncompressed_filesize != php_stream_copy_to_stream(efp, entry->cfp, entry->uncompressed_filesize)) {
			spprintf(p->error, 0, "unable to copy compressed file contents of file \"%s\" while creating new phar \"%s\"", entry->filename, entry->phar->fname);
			return ZEND_HASH_APPLY_STOP;
		}
		php_stream_filter_flush(filter, 1);
		php_stream_flush(entry->cfp);
		php_stream_filter_remove(filter, 1 TSRMLS_CC);
		php_stream_seek(entry->cfp, 0, SEEK_END);
		entry->compressed_filesize = (php_uint32) php_stream_tell(entry->cfp);
		/* generate crc on compressed file */
		php_stream_rewind(entry->cfp);
		entry->old_flags = entry->flags;
		entry->is_modified = 1;
	} else {
		central.uncompsize = local.uncompsize = entry->uncompressed_filesize;
		central.compsize = local.compsize = entry->compressed_filesize;
		if (-1 == php_stream_seek(p->old, entry->offset_abs, SEEK_SET)) {
			spprintf(p->error, 0, "unable to seek to start of file \"%s\" while creating zip-based phar \"%s\"", entry->filename, entry->phar->fname);
			return ZEND_HASH_APPLY_STOP;
		}
	}
not_compressed:
	central.crc32 = local.crc32 = entry->crc32;
continue_dir:
	/* set file metadata */
	if (entry->metadata) {
		php_serialize_data_t metadata_hash;
		if (entry->metadata_str.c) {
			smart_str_free(&entry->metadata_str);
		}
		entry->metadata_str.c = 0;
		entry->metadata_str.len = 0;
		PHP_VAR_SERIALIZE_INIT(metadata_hash);
		php_var_serialize(&entry->metadata_str, &entry->metadata, &metadata_hash TSRMLS_CC);
		PHP_VAR_SERIALIZE_DESTROY(metadata_hash);
		central.comment_len = entry->metadata_str.len;
	}
	entry->header_offset = php_stream_tell(p->filefp);
	offset = entry->header_offset + sizeof(local) + entry->filename_len + (entry->is_dir ? 1 : 0) + sizeof(perms);
	if (sizeof(local) != php_stream_write(p->filefp, (char *)&local, sizeof(local))) {
		spprintf(p->error, 0, "unable to write local file header of file \"%s\" to zip-based phar \"%s\"", entry->filename, entry->phar->fname);
		return ZEND_HASH_APPLY_STOP;
	}
	if (sizeof(central) != php_stream_write(p->centralfp, (char *)&central, sizeof(central))) {
		spprintf(p->error, 0, "unable to write central directory entry for file \"%s\" while creating zip-based phar \"%s\"", entry->filename, entry->phar->fname);
		return ZEND_HASH_APPLY_STOP;
	}
	if (entry->is_dir) {
		if (entry->filename_len != php_stream_write(p->filefp, entry->filename, entry->filename_len)) {
			spprintf(p->error, 0, "unable to write filename to local directory entry for directory \"%s\" while creating zip-based phar \"%s\"", entry->filename, entry->phar->fname);
			return ZEND_HASH_APPLY_STOP;
		}
		if (1 != php_stream_write(p->filefp, "/", 1)) {
			spprintf(p->error, 0, "unable to write filename to local directory entry for directory \"%s\" while creating zip-based phar \"%s\"", entry->filename, entry->phar->fname);
			return ZEND_HASH_APPLY_STOP;
		}
		if (entry->filename_len != php_stream_write(p->centralfp, entry->filename, entry->filename_len)) {
			spprintf(p->error, 0, "unable to write filename to central directory entry for directory \"%s\" while creating zip-based phar \"%s\"", entry->filename, entry->phar->fname);
			return ZEND_HASH_APPLY_STOP;
		}
		if (1 != php_stream_write(p->centralfp, "/", 1)) {
			spprintf(p->error, 0, "unable to write filename to central directory entry for directory \"%s\" while creating zip-based phar \"%s\"", entry->filename, entry->phar->fname);
			return ZEND_HASH_APPLY_STOP;
		}
	} else {
		if (entry->filename_len != php_stream_write(p->filefp, entry->filename, entry->filename_len)) {
			spprintf(p->error, 0, "unable to write filename to local directory entry for file \"%s\" while creating zip-based phar \"%s\"", entry->filename, entry->phar->fname);
			return ZEND_HASH_APPLY_STOP;
		}
		if (entry->filename_len != php_stream_write(p->centralfp, entry->filename, entry->filename_len)) {
			spprintf(p->error, 0, "unable to write filename to central directory entry for file \"%s\" while creating zip-based phar \"%s\"", entry->filename, entry->phar->fname);
			return ZEND_HASH_APPLY_STOP;
		}
	}
	if (sizeof(perms) != php_stream_write(p->filefp, (char *)&perms, sizeof(perms))) {
		spprintf(p->error, 0, "unable to write local extra permissions file header of file \"%s\" to zip-based phar \"%s\"", entry->filename, entry->phar->fname);
		return ZEND_HASH_APPLY_STOP;
	}
	if (sizeof(perms) != php_stream_write(p->centralfp, (char *)&perms, sizeof(perms))) {
		spprintf(p->error, 0, "unable to write central extra permissions file header of file \"%s\" to zip-based phar \"%s\"", entry->filename, entry->phar->fname);
		return ZEND_HASH_APPLY_STOP;
	}
	if (entry->is_modified) {
		if (entry->cfp) {
			if (entry->compressed_filesize != php_stream_copy_to_stream(entry->cfp, p->filefp, entry->compressed_filesize)) {
				spprintf(p->error, 0, "unable to write compressed contents of file \"%s\" in zip-based phar \"%s\"", entry->filename, entry->phar->fname);
				return ZEND_HASH_APPLY_STOP;
			}
			php_stream_close(entry->cfp);
			entry->cfp = NULL;
		} else {
			if (FAILURE == phar_open_entry_fp(entry, p->error TSRMLS_CC)) {
				return ZEND_HASH_APPLY_STOP;
			}
			phar_seek_efp(entry, 0, SEEK_SET, 0 TSRMLS_CC);
			if (entry->uncompressed_filesize != php_stream_copy_to_stream(phar_get_efp(entry), p->filefp, entry->uncompressed_filesize)) {
				spprintf(p->error, 0, "unable to write contents of file \"%s\" in zip-based phar \"%s\"", entry->filename, entry->phar->fname);
				return ZEND_HASH_APPLY_STOP;
			}
		}
		if (entry->fp_type == PHAR_MOD && entry->fp != entry->phar->fp && entry->fp != entry->phar->ufp && entry->fp_refcount == 0) {
			php_stream_close(entry->fp);
		}
		entry->is_modified = 0;
	} else {
		if (!entry->is_dir && entry->compressed_filesize && entry->compressed_filesize != php_stream_copy_to_stream(p->old, p->filefp, entry->compressed_filesize)) {
			spprintf(p->error, 0, "unable to copy contents of file \"%s\" while creating zip-based phar \"%s\"", entry->filename, entry->phar->fname);
			return ZEND_HASH_APPLY_STOP;
		}
	}
	entry->fp = NULL;
	entry->offset = entry->offset_abs = offset;
	entry->fp_type = PHAR_FP;
	if (entry->metadata_str.c) {
		if (entry->metadata_str.len != php_stream_write(p->centralfp, entry->metadata_str.c, entry->metadata_str.len)) {
			spprintf(p->error, 0, "unable to write metadata as file comment for file \"%s\" while creating zip-based phar \"%s\"", entry->filename, entry->phar->fname);
			smart_str_free(&entry->metadata_str);
			return ZEND_HASH_APPLY_STOP;
		}
		smart_str_free(&entry->metadata_str);
	}
	return ZEND_HASH_APPLY_KEEP;
}
/* }}} */

int phar_zip_flush(phar_archive_data *phar, char *user_stub, long len, char **error TSRMLS_DC) /* {{{ */
{
	char *pos;
	smart_str main_metadata_str = {0};
	static const char newstub[] = "<?php // zip-based phar archive stub file\n__HALT_COMPILER();";
	php_stream *stubfile, *oldfile;
	php_serialize_data_t metadata_hash;
	int free_user_stub, closeoldfile = 0;
	phar_entry_info entry = {0};
	char *temperr = NULL;
	struct _phar_zip_pass pass;
	phar_zip_dir_end eocd;

	pass.error = &temperr;
	entry.flags = PHAR_ENT_PERM_DEF_FILE;
	entry.timestamp = time(NULL);
	entry.is_modified = 1;
	entry.is_zip = 1;
	entry.phar = phar;
	entry.fp_type = PHAR_MOD;

	/* set alias */
	if (phar->is_explicit_alias) {
		entry.fp = php_stream_fopen_tmpfile();
		if (phar->alias_len != (int)php_stream_write(entry.fp, phar->alias, phar->alias_len)) {
			if (error) {
				spprintf(error, 0, "unable to set alias in new zip-based phar \"%s\"", phar->fname);
			}
			return EOF;
		}
		entry.uncompressed_filesize = entry.compressed_filesize = phar->alias_len;
		entry.filename = estrndup(".phar/alias.txt", sizeof(".phar/alias.txt")-1);
		entry.filename_len = sizeof(".phar/alias.txt")-1;
		entry.is_modified = 1;
		if (SUCCESS != zend_hash_update(&phar->manifest, entry.filename, entry.filename_len, (void*)&entry, sizeof(phar_entry_info), NULL)) {
			if (error) {
				spprintf(error, 0, "unable to set alias in new zip-based phar \"%s\"", phar->fname);
			}
			return EOF;
		}
	}
	/* register alias */
	if (phar->alias_len) {
		if (FAILURE == phar_get_archive(&phar, phar->fname, phar->fname_len, phar->alias, phar->alias_len, error TSRMLS_CC)) {
			return EOF;
		}
	}

	/* set stub */
	if (user_stub) {
		if (len < 0) {
			/* resource passed in */
			if (!(php_stream_from_zval_no_verify(stubfile, (zval **)user_stub))) {
				if (error) {
					spprintf(error, 0, "unable to access resource to copy stub to new zip-based phar \"%s\"", phar->fname);
				}
				return EOF;
			}
			if (len == -1) {
				len = PHP_STREAM_COPY_ALL;
			} else {
				len = -len;
			}
			user_stub = 0;
			if (!(len = php_stream_copy_to_mem(stubfile, &user_stub, len, 0)) || !user_stub) {
				if (error) {
					spprintf(error, 0, "unable to read resource to copy stub to new zip-based phar \"%s\"", phar->fname);
				}
				return EOF;
			}
			free_user_stub = 1;
		} else {
			free_user_stub = 0;
		}
		if ((pos = strstr(user_stub, "__HALT_COMPILER();")) == NULL)
		{
			if (error) {
				spprintf(error, 0, "illegal stub for zip-based phar \"%s\"", phar->fname);
			}
			if (free_user_stub) {
				efree(user_stub);
			}
			return EOF;
		}
		len = pos - user_stub + 18;
		entry.fp = php_stream_fopen_tmpfile();
		entry.uncompressed_filesize = len + 5;

		if ((size_t)len != php_stream_write(entry.fp, user_stub, len)
		||            5 != php_stream_write(entry.fp, " ?>\r\n", 5)) {
			if (error) {
				spprintf(error, 0, "unable to create stub from string in new zip-based phar \"%s\"", phar->fname);
			}
			if (free_user_stub) {
				efree(user_stub);
			}
			php_stream_close(entry.fp);
			return EOF;
		}
		entry.filename = estrndup(".phar/stub.php", sizeof(".phar/stub.php")-1);
		entry.filename_len = sizeof(".phar/stub.php")-1;
		entry.is_modified = 1;
		if (SUCCESS != zend_hash_update(&phar->manifest, entry.filename, entry.filename_len, (void*)&entry, sizeof(phar_entry_info), NULL)) {
			if (free_user_stub) {
				efree(user_stub);
			}
			if (error) {
				spprintf(error, 0, "unable to set stub in zip-based phar \"%s\"", phar->fname);
			}
			return EOF;
		}
		if (free_user_stub) {
			efree(user_stub);
		}
	} else {
		if (!zend_hash_exists(&phar->manifest, ".phar/stub.php", sizeof(".phar/stub.php")-1)) {
			/* this is a brand new phar, add the stub */
			entry.fp = php_stream_fopen_tmpfile();
			if (sizeof(newstub)-1 != php_stream_write(entry.fp, newstub, sizeof(newstub)-1)) {
				if (error) {
					spprintf(error, 0, "unable to create stub in new zip-based phar \"%s\"", phar->fname);
				}
				return EOF;
			}
			entry.uncompressed_filesize = entry.compressed_filesize = sizeof(newstub) - 1;
			entry.filename = estrndup(".phar/stub.php", sizeof(".phar/stub.php")-1);
			entry.filename_len = sizeof(".phar/stub.php")-1;
			entry.is_modified = 1;
			if (SUCCESS != zend_hash_add(&phar->manifest, entry.filename, entry.filename_len, (void*)&entry, sizeof(phar_entry_info), NULL)) {
				php_stream_close(entry.fp);
				efree(entry.filename);
				if (error) {
					spprintf(error, 0, "unable to create stub in new zip-based phar \"%s\"", phar->fname);
				}
				return EOF;
			}
		}
	}

	if (phar->fp && !phar->is_brandnew) {
		oldfile = phar->fp;
		closeoldfile = 0;
		php_stream_rewind(oldfile);
	} else {
		oldfile = php_stream_open_wrapper(phar->fname, "rb", 0, NULL);
		closeoldfile = oldfile != NULL;
	}

	/* save modified files to the zip */
	pass.old = oldfile;
	pass.filefp = php_stream_fopen_tmpfile();
	if (!pass.filefp) {
		if (closeoldfile) {
			php_stream_close(oldfile);
		}
		if (error) {
			spprintf(error, 4096, "phar zip flush of \"%s\" failed: unable to open temporary file", phar->fname);
		}
		return EOF;
	}
	pass.centralfp = php_stream_fopen_tmpfile();
	if (!pass.centralfp) {
		if (closeoldfile) {
			php_stream_close(oldfile);
		}
		if (error) {
			spprintf(error, 4096, "phar zip flush of \"%s\" failed: unable to open temporary file", phar->fname);
		}
		return EOF;
	}
	memset(&eocd, 0, sizeof(eocd));

	strncpy(eocd.signature, "PK\5\6", 4);
	eocd.counthere = eocd.count = zend_hash_num_elements(&phar->manifest);
	zend_hash_apply_with_argument(&phar->manifest, phar_zip_changed_apply, (void *) &pass TSRMLS_CC);
	if (temperr) {
		php_stream_close(pass.filefp);
		php_stream_close(pass.centralfp);
		if (closeoldfile) {
			php_stream_close(oldfile);
		}
		if (error) {
			spprintf(error, 4096, "phar zip flush of \"%s\" failed: %s", phar->fname, temperr);
		}
		efree(temperr);
		return EOF;
	}

	/* save zip */
	eocd.cdir_size = php_stream_tell(pass.centralfp);
	eocd.cdir_offset = php_stream_tell(pass.filefp);
	/* implement metadata here */
	php_stream_seek(pass.centralfp, 0, SEEK_SET);
	if (eocd.cdir_size != php_stream_copy_to_stream(pass.centralfp, pass.filefp, PHP_STREAM_COPY_ALL)) {
		php_stream_close(pass.filefp);
		php_stream_close(pass.centralfp);
		if (error) {
			spprintf(error, 4096, "phar zip flush of \"%s\" failed: unable to write central-directory", phar->fname);
		}
		if (closeoldfile) {
			php_stream_close(oldfile);
		}
		return EOF;
	}
	php_stream_close(pass.centralfp);
	if (sizeof(eocd) != php_stream_write(pass.filefp, (char *)&eocd, sizeof(eocd))) {
		php_stream_close(pass.filefp);
		if (error) {
			spprintf(error, 4096, "phar zip flush of \"%s\" failed: unable to write end of central-directory", phar->fname);
		}
		if (closeoldfile) {
			php_stream_close(oldfile);
		}
		return EOF;
	}
	if (phar->metadata) {
		/* set phar metadata */
		PHP_VAR_SERIALIZE_INIT(metadata_hash);
		php_var_serialize(&main_metadata_str, &phar->metadata, &metadata_hash TSRMLS_CC);
		PHP_VAR_SERIALIZE_DESTROY(metadata_hash);
		if (main_metadata_str.len != php_stream_write(pass.filefp, main_metadata_str.c, main_metadata_str.len)) {
			php_stream_close(pass.filefp);
			if (error) {
				spprintf(error, 4096, "phar zip flush of \"%s\" failed: unable to write metadata to zip comment", phar->fname);
			}
			if (closeoldfile) {
				php_stream_close(oldfile);
			}
			return EOF;
		}
		smart_str_free(&main_metadata_str);
	}
	if (phar->fp) {
		php_stream_close(phar->fp);
	}
	if (phar->ufp) {
		php_stream_close(phar->ufp);
		phar->ufp = NULL;
	}
	/* re-open */
	phar->is_brandnew = 0;
	if (phar->donotflush) {
		/* deferred flush */
		phar->fp = pass.filefp;
	} else {
		phar->fp = php_stream_open_wrapper(phar->fname, "w+b", IGNORE_URL|STREAM_MUST_SEEK|REPORT_ERRORS, NULL);
		if (!phar->fp) {
			if (closeoldfile) {
				php_stream_close(oldfile);
			}
			phar->fp = pass.filefp;
			if (error) {
				spprintf(error, 4096, "unable to open new phar \"%s\" for writing", phar->fname);
			}
			return EOF;
		}
		php_stream_rewind(pass.filefp);
		php_stream_copy_to_stream(pass.filefp, phar->fp, PHP_STREAM_COPY_ALL);
		/* we could also reopen the file in "rb" mode but there is no need for that */
		php_stream_close(pass.filefp);
	}

	if (closeoldfile) {
		php_stream_close(oldfile);
	}
	return EOF;
}
/* }}} */