[TYPO3-core] RFC: #10201: Duplicate cHash Values

[Francois Suter]

Hi,

> So I'm proposing a new version (v4) here with further encapsulation, so 
> that any change to the cHash calculation really has an effect on all 
> places and not just part of them.

Committed v4 to trunk, in revision 5910.

I added the following text to NEWS.txt:

- in the "Frontend" section:

* cHashes now use the full md5 hash instead of the short hash previously 
calculated by t3lib_div::shortMD5(). This reduces the risk of duplicate 
hashes, which could happen in large web sites. However this may cause 
compatibility issues with some extensions (see Compatibility below).

- in the "Compatibility" section:

* As mentioned in "Frontend", cHash use full-length md5 now. This has an 
impact on extensions that make use of the cHash, like RealURL or the 
Crawler. Make sure to update those extensions to their latest version.

So you should now use the SVN version of RealURL [1]. Dan Pötzinger will 
also follow up with a new version of the crawler.

I will also write an entry in the Core blog about this, but not tonight ;-)

-- 

Francois Suter
Cobweb Development Sarl - http://www.cobweb.ch

[1] https://svn.typo3.org/TYPO3v4/Extensions/realurl/trunk/