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gst/gstregistrybinary.*: Add crc32 checksum to the binary registry file and check this before accepting a registry file.
Original commit message from CVS: * gst/gstregistrybinary.c: (_gst_crc32), (gst_registry_binary_write), (gst_registry_binary_initialize_magic), (gst_registry_binary_write_cache), (gst_registry_binary_check_magic), (gst_registry_binary_read_cache): * gst/gstregistrybinary.h: Add crc32 checksum to the binary registry file and check this before accepting a registry file. Also free the data list when writing to the registry file fails.
This commit is contained in:
Sebastian Dröge
parent
dc71d29b62
commit
550392c6da
3 changed files with 192 additions and 22 deletions
14
ChangeLog
14
ChangeLog
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@ -1,3 +1,17 @@
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2008-04-16 Sebastian Dröge <slomo@circular-chaos.org>
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* gst/gstregistrybinary.c: (_gst_crc32),
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(gst_registry_binary_write),
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(gst_registry_binary_initialize_magic),
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(gst_registry_binary_write_cache),
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(gst_registry_binary_check_magic),
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(gst_registry_binary_read_cache):
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* gst/gstregistrybinary.h:
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Add crc32 checksum to the binary registry file and check this before
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accepting a registry file.
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Also free the data list when writing to the registry file fails.
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2008-04-16 Sebastian Dröge <slomo@circular-chaos.org>
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* gst/gstregistrybinary.c: (gst_registry_binary_save_feature),
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@ -22,14 +22,12 @@
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*/
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/* FIXME:
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* - Add random key to libgstreamer during build and only accept registry,
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* if key matches (or is the version check enough)
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* - keep registry binary blob and reference strings
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* - don't free/unmmap contents when leaving gst_registry_binary_read_cache()
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* - free at gst_deinit() / _priv_gst_registry_cleanup() ?
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* - GstPlugin:
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* - GST_PLUGIN_FLAG_CONST
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* -GstPluginFeature, GstIndexFactory, GstElementFactory
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* - GstPluginFeature, GstIndexFactory, GstElementFactory
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* - needs Flags (GST_PLUGIN_FEATURE_FLAG_CONST)
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* - can we turn loaded into flag?
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* - why do we collect a list of binary chunks and not write immediately
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@ -37,7 +35,6 @@
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* in parent chunk
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* - need more robustness
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* - don't parse beyond mem-block size
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* - include md5-sum ?
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*/
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#ifdef HAVE_CONFIG_H
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@ -93,6 +90,126 @@
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#define align(_ptr) _ptr += (( alignment(_ptr) == 0) ? 0 : ALIGNMENT-alignment(_ptr))
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/* CRC32 calculation */
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/* The crc32() function is copyrighted and licensed as specified below.
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* This only applies to this single function:
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crc32.c -- compute the CRC-32 of a data stream
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Copyright (C) 1995-1998 Mark Adler
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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Jean-loup Gailly Mark Adler
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jloup@gzip.org madler@alumni.caltech.edu
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*/
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/* Changes for gstreamer:
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* - Changed to use GLib data types
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* - Change function name to _gst_crc32
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*/
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/* ========================================================================
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* Table of CRC-32's of all single-byte values (made by make_crc_table)
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*/
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static const guint32 crc_table[256] = {
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0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
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0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
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0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
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0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
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0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,
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0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,
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0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,
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0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
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0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,
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0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,
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0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,
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0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
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0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,
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0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,
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0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL,
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0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
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0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,
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0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,
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0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,
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0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
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0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,
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0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,
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0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,
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0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
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0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,
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0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,
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0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L,
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0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
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0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,
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0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,
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0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,
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0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
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0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,
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0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,
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0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,
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0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
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0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,
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0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,
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0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,
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0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
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0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,
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0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L,
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0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,
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0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
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0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,
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0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,
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0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,
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0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
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0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,
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0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,
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0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,
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0x2d02ef8dL
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};
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/* ========================================================================= */
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#define DO1(buf) crc = crc_table[((gint)crc ^ (*buf++)) & 0xff] ^ (crc >> 8);
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#define DO2(buf) DO1(buf); DO1(buf);
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#define DO4(buf) DO2(buf); DO2(buf);
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#define DO8(buf) DO4(buf); DO4(buf);
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/* ========================================================================= */
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static guint32
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_gst_crc32 (guint32 crc, const gchar * buf, guint len)
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{
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if (buf == NULL)
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return 0L;
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crc = crc ^ 0xffffffffL;
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while (len >= 8) {
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DO8 (buf);
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len -= 8;
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}
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if (len)
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do {
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DO1 (buf);
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} while (--len);
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return crc ^ 0xffffffffL;
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}
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#undef DO1
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#undef DO2
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#undef DO4
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#undef DO8
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/* Registry saving */
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/*
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@ -104,7 +221,8 @@
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*/
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inline static gboolean
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gst_registry_binary_write (GstRegistry * registry, const void *mem,
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const gssize size, unsigned long *file_position, gboolean align)
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const gssize size, unsigned long *file_position, gboolean align,
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guint32 * crc32)
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{
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gchar padder[ALIGNMENT] = { 0, };
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int padsize = 0;
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@ -116,6 +234,8 @@ gst_registry_binary_write (GstRegistry * registry, const void *mem,
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GST_ERROR ("Failed to write binary registry padder");
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return FALSE;
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}
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if (padsize > 0)
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*crc32 = _gst_crc32 (*crc32, padder, padsize);
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*file_position = *file_position + padsize;
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}
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@ -123,6 +243,9 @@ gst_registry_binary_write (GstRegistry * registry, const void *mem,
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GST_ERROR ("Failed to write binary registry element");
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return FALSE;
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}
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if (size > 0)
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*crc32 = _gst_crc32 (*crc32, mem, size);
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*file_position = *file_position + size;
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return TRUE;
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}
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@ -144,6 +267,9 @@ gst_registry_binary_initialize_magic (GstBinaryRegistryMagic * m)
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GST_ERROR ("Failed to write magic to the registry magic structure");
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return FALSE;
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}
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m->crc32 = 0;
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return TRUE;
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}
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@ -458,8 +584,7 @@ gst_registry_binary_write_cache (GstRegistry * registry, const char *location)
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{
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GList *walk;
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gchar *tmp_location;
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GstBinaryRegistryMagic *magic;
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GstBinaryChunk *magic_chunk;
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GstBinaryRegistryMagic magic;
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GList *to_write = NULL;
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unsigned long file_position = 0;
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@ -488,16 +613,9 @@ gst_registry_binary_write_cache (GstRegistry * registry, const char *location)
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}
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}
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magic = g_malloc (sizeof (GstBinaryRegistryMagic));
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if (!gst_registry_binary_initialize_magic (magic))
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if (!gst_registry_binary_initialize_magic (&magic))
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goto fail;
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magic_chunk = g_malloc (sizeof (GstBinaryChunk));
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magic_chunk->data = magic;
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magic_chunk->size = sizeof (GstBinaryRegistryMagic);
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magic_chunk->flags = GST_BINARY_REGISTRY_FLAG_NONE;
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magic_chunk->align = TRUE;
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/* iterate trough the list of plugins and fit them into binary structures */
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for (walk = registry->plugins; walk; walk = g_list_next (walk)) {
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GstPlugin *plugin = GST_PLUGIN (walk->data);
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@ -521,28 +639,44 @@ gst_registry_binary_write_cache (GstRegistry * registry, const char *location)
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plugin->filename);
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}
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}
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to_write = g_list_prepend (to_write, magic_chunk);
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GST_INFO ("Writing binary registry cache");
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/* write magic */
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if (write (registry->cache_file, &magic,
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sizeof (GstBinaryRegistryMagic)) != sizeof (GstBinaryRegistryMagic)) {
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GST_ERROR ("Failed to write binary registry magic");
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goto fail_free_list;
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}
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file_position += sizeof (GstBinaryRegistryMagic);
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/* write out data chunks */
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for (walk = to_write; walk; walk = g_list_next (walk)) {
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GstBinaryChunk *cur = walk->data;
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if (!gst_registry_binary_write (registry, cur->data, cur->size,
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&file_position, cur->align)) {
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&file_position, cur->align, &magic.crc32)) {
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if (!(cur->flags & GST_BINARY_REGISTRY_FLAG_CONST))
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g_free (cur->data);
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g_free (cur);
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g_list_free (to_write);
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goto fail;
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walk->data = NULL;
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goto fail_free_list;
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}
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if (!(cur->flags & GST_BINARY_REGISTRY_FLAG_CONST))
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g_free (cur->data);
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g_free (cur);
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walk->data = NULL;
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}
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g_list_free (to_write);
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if (lseek (registry->cache_file, 0, SEEK_SET) != 0) {
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GST_ERROR ("Seeking to rewrite the binary registry CRC32 failed");
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} else {
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if (write (registry->cache_file, &magic,
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sizeof (GstBinaryRegistryMagic)) != sizeof (GstBinaryRegistryMagic))
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GST_ERROR ("Failed to rewrite binary registry magic");
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}
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if (close (registry->cache_file) < 0)
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goto close_failed;
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|
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|
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@ -561,6 +695,18 @@ gst_registry_binary_write_cache (GstRegistry * registry, const char *location)
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return TRUE;
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/* Errors */
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fail_free_list:
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{
|
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for (walk = to_write; walk; walk = g_list_next (walk)) {
|
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GstBinaryChunk *cur = walk->data;
|
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|
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if (!(cur->flags & GST_BINARY_REGISTRY_FLAG_CONST))
|
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g_free (cur->data);
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g_free (cur);
|
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}
|
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g_list_free (to_write);
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/* fall through */
|
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}
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fail:
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{
|
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(void) close (registry->cache_file);
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|
|
@ -596,9 +742,10 @@ rename_failed:
|
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* date, -1 is a general failure.
|
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*/
|
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static gint
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gst_registry_binary_check_magic (gchar ** in)
|
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gst_registry_binary_check_magic (gchar ** in, gsize size)
|
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{
|
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GstBinaryRegistryMagic *m;
|
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guint32 crc32 = 0;
|
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|
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align (*in);
|
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GST_DEBUG ("Reading/casting for GstBinaryRegistryMagic at address %p", *in);
|
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|
|
@ -625,6 +772,14 @@ gst_registry_binary_check_magic (gchar ** in)
|
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GST_MAGIC_BINARY_VERSION_STR, m->version);
|
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return -2;
|
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}
|
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|
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crc32 = _gst_crc32 (crc32, *in, size - sizeof (GstBinaryRegistryMagic));
|
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if (crc32 != m->crc32) {
|
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GST_WARNING ("Binary registry CRC32 different: 0x%x != 0x%x\n", crc32,
|
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m->crc32);
|
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return -1;
|
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}
|
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|
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return 0;
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}
|
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|
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|
|
@ -939,7 +1094,7 @@ gst_registry_binary_read_cache (GstRegistry * registry, const char *location)
|
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goto Error;
|
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}
|
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/* check if header is valid */
|
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if ((check_magic_result = gst_registry_binary_check_magic (&in)) < 0) {
|
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if ((check_magic_result = gst_registry_binary_check_magic (&in, size)) < 0) {
|
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|
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if (check_magic_result == -1)
|
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GST_ERROR
|
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|
|
|
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|
|
@ -57,7 +57,7 @@
|
|||
* This _must_ be updated whenever the registry format changes,
|
||||
* we currently use the core version where this change happened.
|
||||
*/
|
||||
#define GST_MAGIC_BINARY_VERSION_STR ("0.10.18.1")
|
||||
#define GST_MAGIC_BINARY_VERSION_STR ("0.10.18.2")
|
||||
|
||||
/*
|
||||
* GST_MAGIC_BINARY_VERSION_LEN:
|
||||
|
|
@ -70,6 +70,7 @@ typedef struct _GstBinaryRegistryMagic
|
|||
{
|
||||
gchar magic[GST_MAGIC_BINARY_REGISTRY_LEN];
|
||||
gchar version[GST_MAGIC_BINARY_VERSION_LEN];
|
||||
guint32 crc32;
|
||||
} GstBinaryRegistryMagic;
|
||||
|
||||
/*
|
||||
|
|
|
|||
Loading…
Reference in a new issue