http://fileformats.archiveteam.org/index.php?action=history&feed=atom&title=BlockHashLoc 2026-04-18T11:41:32Z Revision history for this page on the wiki MediaWiki 1.19.2 http://fileformats.archiveteam.org/index.php?title=BlockHashLoc&diff=38394&oldid=prev 2020-10-28T16:02:12Z

<p>add ForensicsWiki entry link (all details already included)</p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 16:02, 28 October 2020</td> </tr><tr><td colspan="2" class="diff-lineno">Line 22:</td> <td colspan="2" class="diff-lineno">Line 22:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://github.com/MarcoPon/BlockHashLoc BlockHashLoc] GitHub repository</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://github.com/MarcoPon/BlockHashLoc BlockHashLoc] GitHub repository</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">== Links ==</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">* [https://web.archive.org/web/20190911115527/http://www.forensicswiki.org/wiki/BlockHashLoc ForensicsWiki entry]</ins></div></td></tr> </table>

JesseW http://fileformats.archiveteam.org/index.php?title=BlockHashLoc&diff=28416&oldid=prev 2017-06-22T15:22:10Z

<p>New page</p> <p><b>New page</b></p><div>{{FormatInfo<br /> | extensions = {{ext|bhl}}<br /> | released = 2017<br /> | caption = BHL - BlockHashLoc<br /> | endianness = Big_endian<br /> | developed by = Marco Pontello<br /> | reference impl = https://github.com/MarcoPon/BlockHashLoc<br /> | error resiliance = {{SHA-2}} <br /> | subcat = Archiving<br /> }}<br /> The purpose of [[BlockHashLoc]] ('''BHL''') is to enable the recovery of files after total loss of File System structure, or without even knowing what FS was used in the first place.<br /> <br /> The way it can recover a given file is by keeping a (small) parallel BHL file with a list of crypto-hashes of all the blocks (of selectable size) that compose it. So it's then possible to read blocks from a disk image/volume, calculate their hashes, compare them with the saved ones and rebuild the original file.<br /> <br /> With adequately sized blocks (512 bytes, 4KB, etc. depending on the media and File System), this let one recover a file regardless of the FS used, or the FS integrity, or the fragmentation level.<br /> <br /> == Identification ==<br /> <br /> A BHL files start with bytes {{magic|42 6C 6F 63 6B 48 61 73 68 4C 6F 63 1A}}, or &quot;{{magic|BlockHashLoc}}&quot;+EOF in [[ASCII]].<br /> <br /> == Format description ==<br /> <br /> * [https://github.com/MarcoPon/BlockHashLoc BlockHashLoc] GitHub repository</div>

Mark0