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phar.c
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/*
+----------------------------------------------------------------------+
| phar php single-file executable PHP extension |
+----------------------------------------------------------------------+
| Copyright (c) 2005-2016 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 |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Gregory Beaver <[email protected]> |
| Marcus Boerger <[email protected]> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#define PHAR_MAIN 1
#include "phar_internal.h"
#include "SAPI.h"
#include "func_interceptors.h"
static void destroy_phar_data(zval *zv);
ZEND_DECLARE_MODULE_GLOBALS(phar)
zend_string *(*phar_save_resolve_path)(const char *filename, int filename_len);
/**
* set's phar->is_writeable based on the current INI value
*/
static int phar_set_writeable_bit(zval *zv, void *argument) /* {{{ */
{
zend_bool keep = *(zend_bool *)argument;
phar_archive_data *phar = (phar_archive_data *)Z_PTR_P(zv);
if (!phar->is_data) {
phar->is_writeable = !keep;
}
return ZEND_HASH_APPLY_KEEP;
}
/* }}} */
/* if the original value is 0 (disabled), then allow setting/unsetting at will. Otherwise only allow 1 (enabled), and error on disabling */
ZEND_INI_MH(phar_ini_modify_handler) /* {{{ */
{
zend_bool old, ini;
if (ZSTR_LEN(entry->name) == sizeof("phar.readonly")-1) {
old = PHAR_G(readonly_orig);
} else {
old = PHAR_G(require_hash_orig);
}
if (ZSTR_LEN(new_value) == 2 && !strcasecmp("on", ZSTR_VAL(new_value))) {
ini = (zend_bool) 1;
}
else if (ZSTR_LEN(new_value) == 3 && !strcasecmp("yes", ZSTR_VAL(new_value))) {
ini = (zend_bool) 1;
}
else if (ZSTR_LEN(new_value) == 4 && !strcasecmp("true", ZSTR_VAL(new_value))) {
ini = (zend_bool) 1;
}
else {
ini = (zend_bool) atoi(ZSTR_VAL(new_value));
}
/* do not allow unsetting in runtime */
if (stage == ZEND_INI_STAGE_STARTUP) {
if (ZSTR_LEN(entry->name) == sizeof("phar.readonly")-1) {
PHAR_G(readonly_orig) = ini;
} else {
PHAR_G(require_hash_orig) = ini;
}
} else if (old && !ini) {
return FAILURE;
}
if (ZSTR_LEN(entry->name) == sizeof("phar.readonly")-1) {
PHAR_G(readonly) = ini;
if (PHAR_G(request_init) && PHAR_G(phar_fname_map.u.flags)) {
zend_hash_apply_with_argument(&(PHAR_G(phar_fname_map)), phar_set_writeable_bit, (void *)&ini);
}
} else {
PHAR_G(require_hash) = ini;
}
return SUCCESS;
}
/* }}}*/
/* this global stores the global cached pre-parsed manifests */
HashTable cached_phars;
HashTable cached_alias;
static void phar_split_cache_list(void) /* {{{ */
{
char *tmp;
char *key, *lasts, *end;
char ds[2];
phar_archive_data *phar;
uint i = 0;
if (!PHAR_G(cache_list) || !(PHAR_G(cache_list)[0])) {
return;
}
ds[0] = DEFAULT_DIR_SEPARATOR;
ds[1] = '\0';
tmp = estrdup(PHAR_G(cache_list));
/* fake request startup */
PHAR_G(request_init) = 1;
zend_hash_init(&EG(regular_list), 0, NULL, NULL, 0);
EG(regular_list).nNextFreeElement=1; /* we don't want resource id 0 */
PHAR_G(has_bz2) = zend_hash_str_exists(&module_registry, "bz2", sizeof("bz2")-1);
PHAR_G(has_zlib) = zend_hash_str_exists(&module_registry, "zlib", sizeof("zlib")-1);
/* these two are dummies and will be destroyed later */
zend_hash_init(&cached_phars, sizeof(phar_archive_data*), zend_get_hash_value, destroy_phar_data, 1);
zend_hash_init(&cached_alias, sizeof(phar_archive_data*), zend_get_hash_value, NULL, 1);
/* these two are real and will be copied over cached_phars/cached_alias later */
zend_hash_init(&(PHAR_G(phar_fname_map)), sizeof(phar_archive_data*), zend_get_hash_value, destroy_phar_data, 1);
zend_hash_init(&(PHAR_G(phar_alias_map)), sizeof(phar_archive_data*), zend_get_hash_value, NULL, 1);
PHAR_G(manifest_cached) = 1;
PHAR_G(persist) = 1;
for (key = php_strtok_r(tmp, ds, &lasts);
key;
key = php_strtok_r(NULL, ds, &lasts)) {
end = strchr(key, DEFAULT_DIR_SEPARATOR);
if (end) {
if (SUCCESS == phar_open_from_filename(key, end - key, NULL, 0, 0, &phar, NULL)) {
finish_up:
phar->phar_pos = i++;
php_stream_close(phar->fp);
phar->fp = NULL;
} else {
finish_error:
PHAR_G(persist) = 0;
PHAR_G(manifest_cached) = 0;
efree(tmp);
zend_hash_destroy(&(PHAR_G(phar_fname_map)));
PHAR_G(phar_fname_map.u.flags) = 0;
zend_hash_destroy(&(PHAR_G(phar_alias_map)));
PHAR_G(phar_alias_map.u.flags) = 0;
zend_hash_destroy(&cached_phars);
zend_hash_destroy(&cached_alias);
zend_hash_graceful_reverse_destroy(&EG(regular_list));
memset(&EG(regular_list), 0, sizeof(HashTable));
/* free cached manifests */
PHAR_G(request_init) = 0;
return;
}
} else {
if (SUCCESS == phar_open_from_filename(key, strlen(key), NULL, 0, 0, &phar, NULL)) {
goto finish_up;
} else {
goto finish_error;
}
}
}
PHAR_G(persist) = 0;
PHAR_G(request_init) = 0;
/* destroy dummy values from before */
zend_hash_destroy(&cached_phars);
zend_hash_destroy(&cached_alias);
cached_phars = PHAR_G(phar_fname_map);
cached_alias = PHAR_G(phar_alias_map);
PHAR_G(phar_fname_map.u.flags) = 0;
PHAR_G(phar_alias_map.u.flags) = 0;
zend_hash_graceful_reverse_destroy(&EG(regular_list));
memset(&EG(regular_list), 0, sizeof(HashTable));
efree(tmp);
}
/* }}} */
ZEND_INI_MH(phar_ini_cache_list) /* {{{ */
{
PHAR_G(cache_list) = ZSTR_VAL(new_value);
if (stage == ZEND_INI_STAGE_STARTUP) {
phar_split_cache_list();
}
return SUCCESS;
}
/* }}} */
PHP_INI_BEGIN()
STD_PHP_INI_BOOLEAN("phar.readonly", "1", PHP_INI_ALL, phar_ini_modify_handler, readonly, zend_phar_globals, phar_globals)
STD_PHP_INI_BOOLEAN("phar.require_hash", "1", PHP_INI_ALL, phar_ini_modify_handler, require_hash, zend_phar_globals, phar_globals)
STD_PHP_INI_ENTRY("phar.cache_list", "", PHP_INI_SYSTEM, phar_ini_cache_list, cache_list, zend_phar_globals, phar_globals)
PHP_INI_END()
/**
* When all uses of a phar have been concluded, this frees the manifest
* and the phar slot
*/
void phar_destroy_phar_data(phar_archive_data *phar) /* {{{ */
{
if (phar->alias && phar->alias != phar->fname) {
pefree(phar->alias, phar->is_persistent);
phar->alias = NULL;
}
if (phar->fname) {
pefree(phar->fname, phar->is_persistent);
phar->fname = NULL;
}
if (phar->signature) {
pefree(phar->signature, phar->is_persistent);
phar->signature = NULL;
}
if (phar->manifest.u.flags) {
zend_hash_destroy(&phar->manifest);
phar->manifest.u.flags = 0;
}
if (phar->mounted_dirs.u.flags) {
zend_hash_destroy(&phar->mounted_dirs);
phar->mounted_dirs.u.flags = 0;
}
if (phar->virtual_dirs.u.flags) {
zend_hash_destroy(&phar->virtual_dirs);
phar->virtual_dirs.u.flags = 0;
}
if (Z_TYPE(phar->metadata) != IS_UNDEF) {
if (phar->is_persistent) {
if (phar->metadata_len) {
/* for zip comments that are strings */
free(Z_PTR(phar->metadata));
} else {
zval_internal_ptr_dtor(&phar->metadata);
}
} else {
zval_ptr_dtor(&phar->metadata);
}
phar->metadata_len = 0;
ZVAL_UNDEF(&phar->metadata);
}
if (phar->fp) {
php_stream_close(phar->fp);
phar->fp = 0;
}
if (phar->ufp) {
php_stream_close(phar->ufp);
phar->ufp = 0;
}
pefree(phar, phar->is_persistent);
}
/* }}}*/
/**
* Delete refcount and destruct if needed. On destruct return 1 else 0.
*/
int phar_archive_delref(phar_archive_data *phar) /* {{{ */
{
if (phar->is_persistent) {
return 0;
}
if (--phar->refcount < 0) {
if (PHAR_G(request_done)
|| zend_hash_str_del(&(PHAR_G(phar_fname_map)), phar->fname, phar->fname_len) != SUCCESS) {
phar_destroy_phar_data(phar);
}
return 1;
} else if (!phar->refcount) {
/* invalidate phar cache */
PHAR_G(last_phar) = NULL;
PHAR_G(last_phar_name) = PHAR_G(last_alias) = NULL;
if (phar->fp && !(phar->flags & PHAR_FILE_COMPRESSION_MASK)) {
/* close open file handle - allows removal or rename of
the file on windows, which has greedy locking
only close if the archive was not already compressed. If it
was compressed, then the fp does not refer to the original file */
php_stream_close(phar->fp);
phar->fp = NULL;
}
if (!zend_hash_num_elements(&phar->manifest)) {
/* this is a new phar that has perhaps had an alias/metadata set, but has never
been flushed */
if (zend_hash_str_del(&(PHAR_G(phar_fname_map)), phar->fname, phar->fname_len) != SUCCESS) {
phar_destroy_phar_data(phar);
}
return 1;
}
}
return 0;
}
/* }}}*/
/**
* Destroy phar's in shutdown, here we don't care about aliases
*/
static void destroy_phar_data_only(zval *zv) /* {{{ */
{
phar_archive_data *phar_data = (phar_archive_data *) Z_PTR_P(zv);
if (EG(exception) || --phar_data->refcount < 0) {
phar_destroy_phar_data(phar_data);
}
}
/* }}}*/
/**
* Delete aliases to phar's that got kicked out of the global table
*/
static int phar_unalias_apply(zval *zv, void *argument) /* {{{ */
{
return Z_PTR_P(zv) == argument ? ZEND_HASH_APPLY_REMOVE : ZEND_HASH_APPLY_KEEP;
}
/* }}} */
/**
* Delete aliases to phar's that got kicked out of the global table
*/
static int phar_tmpclose_apply(zval *zv) /* {{{ */
{
phar_entry_info *entry = (phar_entry_info *) Z_PTR_P(zv);
if (entry->fp_type != PHAR_TMP) {
return ZEND_HASH_APPLY_KEEP;
}
if (entry->fp && !entry->fp_refcount) {
php_stream_close(entry->fp);
entry->fp = NULL;
}
return ZEND_HASH_APPLY_KEEP;
}
/* }}} */
/**
* Filename map destructor
*/
static void destroy_phar_data(zval *zv) /* {{{ */
{
phar_archive_data *phar_data = (phar_archive_data *)Z_PTR_P(zv);
if (PHAR_G(request_ends)) {
/* first, iterate over the manifest and close all PHAR_TMP entry fp handles,
this prevents unnecessary unfreed stream resources */
zend_hash_apply(&(phar_data->manifest), phar_tmpclose_apply);
destroy_phar_data_only(zv);
return;
}
zend_hash_apply_with_argument(&(PHAR_G(phar_alias_map)), phar_unalias_apply, phar_data);
if (--phar_data->refcount < 0) {
phar_destroy_phar_data(phar_data);
}
}
/* }}}*/
/**
* destructor for the manifest hash, frees each file's entry
*/
void destroy_phar_manifest_entry_int(phar_entry_info *entry) /* {{{ */
{
if (entry->cfp) {
php_stream_close(entry->cfp);
entry->cfp = 0;
}
if (entry->fp) {
php_stream_close(entry->fp);
entry->fp = 0;
}
if (Z_TYPE(entry->metadata) != IS_UNDEF) {
if (entry->is_persistent) {
if (entry->metadata_len) {
/* for zip comments that are strings */
free(Z_PTR(entry->metadata));
} else {
zval_internal_ptr_dtor(&entry->metadata);
}
} else {
zval_ptr_dtor(&entry->metadata);
}
entry->metadata_len = 0;
ZVAL_UNDEF(&entry->metadata);
}
if (entry->metadata_str.s) {
smart_str_free(&entry->metadata_str);
entry->metadata_str.s = NULL;
}
pefree(entry->filename, entry->is_persistent);
if (entry->link) {
pefree(entry->link, entry->is_persistent);
entry->link = 0;
}
if (entry->tmp) {
pefree(entry->tmp, entry->is_persistent);
entry->tmp = 0;
}
}
/* }}} */
void destroy_phar_manifest_entry(zval *zv) /* {{{ */
{
phar_entry_info *entry = Z_PTR_P(zv);
destroy_phar_manifest_entry_int(entry);
pefree(entry, entry->is_persistent);
}
/* }}} */
int phar_entry_delref(phar_entry_data *idata) /* {{{ */
{
int ret = 0;
if (idata->internal_file && !idata->internal_file->is_persistent) {
if (--idata->internal_file->fp_refcount < 0) {
idata->internal_file->fp_refcount = 0;
}
if (idata->fp && idata->fp != idata->phar->fp && idata->fp != idata->phar->ufp && idata->fp != idata->internal_file->fp) {
php_stream_close(idata->fp);
}
/* if phar_get_or_create_entry_data returns a sub-directory, we have to free it */
if (idata->internal_file->is_temp_dir) {
destroy_phar_manifest_entry_int(idata->internal_file);
efree(idata->internal_file);
}
}
phar_archive_delref(idata->phar);
efree(idata);
return ret;
}
/* }}} */
/**
* Removes an entry, either by actually removing it or by marking it.
*/
void phar_entry_remove(phar_entry_data *idata, char **error) /* {{{ */
{
phar_archive_data *phar;
phar = idata->phar;
if (idata->internal_file->fp_refcount < 2) {
if (idata->fp && idata->fp != idata->phar->fp && idata->fp != idata->phar->ufp && idata->fp != idata->internal_file->fp) {
php_stream_close(idata->fp);
}
zend_hash_str_del(&idata->phar->manifest, idata->internal_file->filename, idata->internal_file->filename_len);
idata->phar->refcount--;
efree(idata);
} else {
idata->internal_file->is_deleted = 1;
phar_entry_delref(idata);
}
if (!phar->donotflush) {
phar_flush(phar, 0, 0, 0, error);
}
}
/* }}} */
#define MAPPHAR_ALLOC_FAIL(msg) \
if (fp) {\
php_stream_close(fp);\
}\
if (error) {\
spprintf(error, 0, msg, fname);\
}\
return FAILURE;
#define MAPPHAR_FAIL(msg) \
efree(savebuf);\
if (mydata) {\
phar_destroy_phar_data(mydata);\
}\
if (signature) {\
pefree(signature, PHAR_G(persist));\
}\
MAPPHAR_ALLOC_FAIL(msg)
#ifdef WORDS_BIGENDIAN
# define PHAR_GET_32(buffer, var) \
var = ((((unsigned char*)(buffer))[3]) << 24) \
| ((((unsigned char*)(buffer))[2]) << 16) \
| ((((unsigned char*)(buffer))[1]) << 8) \
| (((unsigned char*)(buffer))[0]); \
(buffer) += 4
# define PHAR_GET_16(buffer, var) \
var = ((((unsigned char*)(buffer))[1]) << 8) \
| (((unsigned char*)(buffer))[0]); \
(buffer) += 2
#else
# define PHAR_GET_32(buffer, var) \
memcpy(&var, buffer, sizeof(var)); \
buffer += 4
# define PHAR_GET_16(buffer, var) \
var = *(uint16_t*)(buffer); \
buffer += 2
#endif
#define PHAR_ZIP_16(var) ((uint16_t)((((uint16_t)var[0]) & 0xff) | \
(((uint16_t)var[1]) & 0xff) << 8))
#define PHAR_ZIP_32(var) ((uint32_t)((((uint32_t)var[0]) & 0xff) | \
(((uint32_t)var[1]) & 0xff) << 8 | \
(((uint32_t)var[2]) & 0xff) << 16 | \
(((uint32_t)var[3]) & 0xff) << 24))
/**
* Open an already loaded phar
*/
int phar_open_parsed_phar(char *fname, int fname_len, char *alias, int alias_len, int is_data, int options, phar_archive_data** pphar, char **error) /* {{{ */
{
phar_archive_data *phar;
#ifdef PHP_WIN32
char *unixfname;
#endif
if (error) {
*error = NULL;
}
#ifdef PHP_WIN32
unixfname = estrndup(fname, fname_len);
phar_unixify_path_separators(unixfname, fname_len);
if (SUCCESS == phar_get_archive(&phar, unixfname, fname_len, alias, alias_len, error)
&& ((alias && fname_len == phar->fname_len
&& !strncmp(unixfname, phar->fname, fname_len)) || !alias)
) {
phar_entry_info *stub;
efree(unixfname);
#else
if (SUCCESS == phar_get_archive(&phar, fname, fname_len, alias, alias_len, error)
&& ((alias && fname_len == phar->fname_len
&& !strncmp(fname, phar->fname, fname_len)) || !alias)
) {
phar_entry_info *stub;
#endif
/* logic above is as follows:
If an explicit alias was requested, ensure the filename passed in
matches the phar's filename.
If no alias was passed in, then it can match either and be valid
*/
if (!is_data) {
/* prevent any ".phar" without a stub getting through */
if (!phar->halt_offset && !phar->is_brandnew && (phar->is_tar || phar->is_zip)) {
if (PHAR_G(readonly) && NULL == (stub = zend_hash_str_find_ptr(&(phar->manifest), ".phar/stub.php", sizeof(".phar/stub.php")-1))) {
if (error) {
spprintf(error, 0, "'%s' is not a phar archive. Use PharData::__construct() for a standard zip or tar archive", fname);
}
return FAILURE;
}
}
}
if (pphar) {
*pphar = phar;
}
return SUCCESS;
} else {
#ifdef PHP_WIN32
efree(unixfname);
#endif
if (pphar) {
*pphar = NULL;
}
if (phar && error && !(options & REPORT_ERRORS)) {
efree(error);
}
return FAILURE;
}
}
/* }}}*/
/**
* Parse out metadata from the manifest for a single file
*
* Meta-data is in this format:
* [len32][data...]
*
* data is the serialized zval
*/
int phar_parse_metadata(char **buffer, zval *metadata, uint32_t zip_metadata_len) /* {{{ */
{
php_unserialize_data_t var_hash;
if (zip_metadata_len) {
const unsigned char *p;
unsigned char *p_buff = (unsigned char *)estrndup(*buffer, zip_metadata_len);
p = p_buff;
ZVAL_NULL(metadata);
PHP_VAR_UNSERIALIZE_INIT(var_hash);
if (!php_var_unserialize(metadata, &p, p + zip_metadata_len, &var_hash)) {
efree(p_buff);
PHP_VAR_UNSERIALIZE_DESTROY(var_hash);
zval_ptr_dtor(metadata);
ZVAL_UNDEF(metadata);
return FAILURE;
}
efree(p_buff);
PHP_VAR_UNSERIALIZE_DESTROY(var_hash);
if (PHAR_G(persist)) {
/* lazy init metadata */
zval_ptr_dtor(metadata);
Z_PTR_P(metadata) = pemalloc(zip_metadata_len, 1);
memcpy(Z_PTR_P(metadata), *buffer, zip_metadata_len);
return SUCCESS;
}
} else {
ZVAL_UNDEF(metadata);
}
return SUCCESS;
}
/* }}}*/
/**
* 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_from_filename to process the manifest, but can be called
* directly.
*/
static int phar_parse_pharfile(php_stream *fp, char *fname, int fname_len, char *alias, int alias_len, zend_long halt_offset, phar_archive_data** pphar, uint32_t compression, char **error) /* {{{ */
{
char b32[4], *buffer, *endbuffer, *savebuf;
phar_archive_data *mydata = NULL;
phar_entry_info entry;
uint32_t manifest_len, manifest_count, manifest_flags, manifest_index, tmp_len, sig_flags;
uint16_t manifest_ver;
uint32_t len;
zend_long offset;
int sig_len, register_alias = 0, temp_alias = 0;
char *signature = NULL;
if (pphar) {
*pphar = NULL;
}
if (error) {
*error = NULL;
}
/* check for ?>\n and increment accordingly */
if (-1 == php_stream_seek(fp, halt_offset, SEEK_SET)) {
MAPPHAR_ALLOC_FAIL("cannot seek to __HALT_COMPILER(); location in phar \"%s\"")
}
buffer = b32;
if (3 != php_stream_read(fp, buffer, 3)) {
MAPPHAR_ALLOC_FAIL("internal corruption of phar \"%s\" (truncated manifest at stub end)")
}
if ((*buffer == ' ' || *buffer == '\n') && *(buffer + 1) == '?' && *(buffer + 2) == '>') {
int nextchar;
halt_offset += 3;
if (EOF == (nextchar = php_stream_getc(fp))) {
MAPPHAR_ALLOC_FAIL("internal corruption of phar \"%s\" (truncated manifest at stub end)")
}
if ((char) nextchar == '\r') {
/* if we have an \r we require an \n as well */
if (EOF == (nextchar = php_stream_getc(fp)) || (char)nextchar != '\n') {
MAPPHAR_ALLOC_FAIL("internal corruption of phar \"%s\" (truncated manifest at stub end)")
}
++halt_offset;
}
if ((char) nextchar == '\n') {
++halt_offset;
}
}
/* make sure we are at the right location to read the manifest */
if (-1 == php_stream_seek(fp, halt_offset, SEEK_SET)) {
MAPPHAR_ALLOC_FAIL("cannot seek to __HALT_COMPILER(); location in phar \"%s\"")
}
/* read in manifest */
buffer = b32;
if (4 != php_stream_read(fp, buffer, 4)) {
MAPPHAR_ALLOC_FAIL("internal corruption of phar \"%s\" (truncated manifest at manifest length)")
}
PHAR_GET_32(buffer, manifest_len);
if (manifest_len > 1048576 * 100) {
/* prevent serious memory issues by limiting manifest to at most 100 MB in length */
MAPPHAR_ALLOC_FAIL("manifest cannot be larger than 100 MB in phar \"%s\"")
}
buffer = (char *)emalloc(manifest_len);
savebuf = buffer;
endbuffer = buffer + manifest_len;
if (manifest_len < 10 || manifest_len != php_stream_read(fp, buffer, manifest_len)) {
MAPPHAR_FAIL("internal corruption of phar \"%s\" (truncated manifest header)")
}
/* extract the number of entries */
PHAR_GET_32(buffer, manifest_count);
if (manifest_count == 0) {
MAPPHAR_FAIL("in phar \"%s\", manifest claims to have zero entries. Phars must have at least 1 entry");
}
/* extract API version, lowest nibble currently unused */
manifest_ver = (((unsigned char)buffer[0]) << 8)
+ ((unsigned char)buffer[1]);
buffer += 2;
if ((manifest_ver & PHAR_API_VER_MASK) < PHAR_API_MIN_READ) {
efree(savebuf);
php_stream_close(fp);
if (error) {
spprintf(error, 0, "phar \"%s\" is API version %1.u.%1.u.%1.u, and cannot be processed", fname, manifest_ver >> 12, (manifest_ver >> 8) & 0xF, (manifest_ver >> 4) & 0x0F);
}
return FAILURE;
}
PHAR_GET_32(buffer, manifest_flags);
manifest_flags &= ~PHAR_HDR_COMPRESSION_MASK;
manifest_flags &= ~PHAR_FILE_COMPRESSION_MASK;
/* remember whether this entire phar was compressed with gz/bzip2 */
manifest_flags |= compression;
/* The lowest nibble contains the phar wide flags. The compression flags can */
/* be ignored on reading because it is being generated anyways. */
if (manifest_flags & PHAR_HDR_SIGNATURE) {
char sig_buf[8], *sig_ptr = sig_buf;
zend_off_t read_len;
size_t end_of_phar;
if (-1 == php_stream_seek(fp, -8, SEEK_END)
|| (read_len = php_stream_tell(fp)) < 20
|| 8 != php_stream_read(fp, sig_buf, 8)
|| memcmp(sig_buf+4, "GBMB", 4)) {
efree(savebuf);
php_stream_close(fp);
if (error) {
spprintf(error, 0, "phar \"%s\" has a broken signature", fname);
}
return FAILURE;
}
PHAR_GET_32(sig_ptr, sig_flags);
switch(sig_flags) {
case PHAR_SIG_OPENSSL: {
uint32_t signature_len;
char *sig;
zend_off_t whence;
/* we store the signature followed by the signature length */
if (-1 == php_stream_seek(fp, -12, SEEK_CUR)
|| 4 != php_stream_read(fp, sig_buf, 4)) {
efree(savebuf);
php_stream_close(fp);
if (error) {
spprintf(error, 0, "phar \"%s\" openssl signature length could not be read", fname);
}
return FAILURE;
}
sig_ptr = sig_buf;
PHAR_GET_32(sig_ptr, signature_len);
sig = (char *) emalloc(signature_len);
whence = signature_len + 4;
whence = -whence;
if (-1 == php_stream_seek(fp, whence, SEEK_CUR)
|| !(end_of_phar = php_stream_tell(fp))
|| signature_len != php_stream_read(fp, sig, signature_len)) {
efree(savebuf);
efree(sig);
php_stream_close(fp);
if (error) {
spprintf(error, 0, "phar \"%s\" openssl signature could not be read", fname);
}
return FAILURE;
}
if (FAILURE == phar_verify_signature(fp, end_of_phar, PHAR_SIG_OPENSSL, sig, signature_len, fname, &signature, &sig_len, error)) {
efree(savebuf);
efree(sig);
php_stream_close(fp);
if (error) {
char *save = *error;
spprintf(error, 0, "phar \"%s\" openssl signature could not be verified: %s", fname, *error);
efree(save);
}
return FAILURE;
}
efree(sig);
}
break;
#if PHAR_HASH_OK
case PHAR_SIG_SHA512: {
unsigned char digest[64];
php_stream_seek(fp, -(8 + 64), SEEK_END);
read_len = php_stream_tell(fp);
if (php_stream_read(fp, (char*)digest, sizeof(digest)) != sizeof(digest)) {
efree(savebuf);
php_stream_close(fp);
if (error) {
spprintf(error, 0, "phar \"%s\" has a broken signature", fname);
}
return FAILURE;
}
if (FAILURE == phar_verify_signature(fp, read_len, PHAR_SIG_SHA512, (char *)digest, 64, fname, &signature, &sig_len, error)) {
efree(savebuf);
php_stream_close(fp);
if (error) {
char *save = *error;
spprintf(error, 0, "phar \"%s\" SHA512 signature could not be verified: %s", fname, *error);
efree(save);
}
return FAILURE;
}
break;
}
case PHAR_SIG_SHA256: {
unsigned char digest[32];
php_stream_seek(fp, -(8 + 32), SEEK_END);
read_len = php_stream_tell(fp);
if (php_stream_read(fp, (char*)digest, sizeof(digest)) != sizeof(digest)) {
efree(savebuf);
php_stream_close(fp);
if (error) {
spprintf(error, 0, "phar \"%s\" has a broken signature", fname);
}
return FAILURE;
}
if (FAILURE == phar_verify_signature(fp, read_len, PHAR_SIG_SHA256, (char *)digest, 32, fname, &signature, &sig_len, error)) {
efree(savebuf);
php_stream_close(fp);
if (error) {
char *save = *error;
spprintf(error, 0, "phar \"%s\" SHA256 signature could not be verified: %s", fname, *error);
efree(save);
}
return FAILURE;
}
break;
}
#else
case PHAR_SIG_SHA512:
case PHAR_SIG_SHA256:
efree(savebuf);
php_stream_close(fp);
if (error) {
spprintf(error, 0, "phar \"%s\" has a unsupported signature", fname);
}
return FAILURE;
#endif
case PHAR_SIG_SHA1: {
unsigned char digest[20];
php_stream_seek(fp, -(8 + 20), SEEK_END);
read_len = php_stream_tell(fp);
if (php_stream_read(fp, (char*)digest, sizeof(digest)) != sizeof(digest)) {
efree(savebuf);
php_stream_close(fp);
if (error) {
spprintf(error, 0, "phar \"%s\" has a broken signature", fname);
}
return FAILURE;
}
if (FAILURE == phar_verify_signature(fp, read_len, PHAR_SIG_SHA1, (char *)digest, 20, fname, &signature, &sig_len, error)) {
efree(savebuf);
php_stream_close(fp);
if (error) {
char *save = *error;
spprintf(error, 0, "phar \"%s\" SHA1 signature could not be verified: %s", fname, *error);
efree(save);
}
return FAILURE;
}
break;
}
case PHAR_SIG_MD5: {
unsigned char digest[16];
php_stream_seek(fp, -(8 + 16), SEEK_END);
read_len = php_stream_tell(fp);
if (php_stream_read(fp, (char*)digest, sizeof(digest)) != sizeof(digest)) {
efree(savebuf);
php_stream_close(fp);
if (error) {
spprintf(error, 0, "phar \"%s\" has a broken signature", fname);
}
return FAILURE;
}
if (FAILURE == phar_verify_signature(fp, read_len, PHAR_SIG_MD5, (char *)digest, 16, fname, &signature, &sig_len, error)) {
efree(savebuf);
php_stream_close(fp);
if (error) {
char *save = *error;
spprintf(error, 0, "phar \"%s\" MD5 signature could not be verified: %s", fname, *error);
efree(save);
}
return FAILURE;
}
break;
}
default:
efree(savebuf);
php_stream_close(fp);
if (error) {
spprintf(error, 0, "phar \"%s\" has a broken or unsupported signature", fname);
}
return FAILURE;
}
} else if (PHAR_G(require_hash)) {
efree(savebuf);
php_stream_close(fp);
if (error) {
spprintf(error, 0, "phar \"%s\" does not have a signature", fname);
}
return FAILURE;
} else {
sig_flags = 0;
sig_len = 0;
}
/* extract alias */
PHAR_GET_32(buffer, tmp_len);
if (buffer + tmp_len > endbuffer) {
MAPPHAR_FAIL("internal corruption of phar \"%s\" (buffer overrun)");
}
if (manifest_len < 10 + tmp_len) {
MAPPHAR_FAIL("internal corruption of phar \"%s\" (truncated manifest header)")
}
/* tmp_len = 0 says alias length is 0, which means the alias is not stored in the phar */
if (tmp_len) {
/* if the alias is stored we enforce it (implicit overrides explicit) */
if (alias && alias_len && (alias_len != (int)tmp_len || strncmp(alias, buffer, tmp_len)))
{
buffer[tmp_len] = '\0';
php_stream_close(fp);
if (signature) {
efree(signature);
}
if (error) {
spprintf(error, 0, "cannot load phar \"%s\" with implicit alias \"%s\" under different alias \"%s\"", fname, buffer, alias);
}
efree(savebuf);
return FAILURE;
}