[squid-users] Squid 3.5.12 RPMs release for CentOS 6 and 7.

Alex Samad alex at samad.com.au
Mon Dec 21 22:33:23 UTC 2015


On 21 December 2015 at 21:57, Eliezer Croitoru <eliezer at ngtech.co.il> wrote:
> Published at: http://www1.ngtech.co.il/wpe/?p=166
> I am happy to release the new RPMs of squid 3.5.12 for Centos 6 64bit, 32bit
> and CentOS 7 64bit.
> The new release includes couple bug fixes and improvements.
> I have also took the time to build the latest beta 4.0.3 RPM for CentOS 7.
> The details about the the RPMs repository are at
> squid-wiki[http://wiki.squid-cache.org/KnowledgeBase/CentOS].
> Why 3DES (triple DES)? or The fall of DES.
> It is known in the cryptography world that since 1997 DES(IE single DES) is
> vulnerable to some attacks  and there for is being considered to be unsafe
> for some uses. In order to resolve the DES issues the 3DES was implemented
> due to the ability to use the same fast cryptography machinery\chips that
> was used before and by that giving some time to the industry to find another
> more fit solution.
> Some words about the DES encryption from Professor Gideon Samid:
> [https://www.youtube.com/watch?v=r68Ft_rRZP0]
> Hashing compared to Encryption
> The difference between hashing  to encryption is the ability to recreate the
> original digested content. Hashes are meant to allow some kind of content
> validation verification based on the low probability of  math collisions. To
> give a simple example about the subject we can use the Quadratic Formula:
> [http://www1.ngtech.co.il/wpe/wp-content/uploads/2015/12/Quadratic-Formula.jpg]
> Quadratic Formula
> The formula defines that it is possible (or it is always the right answer)
> to have two answers to the same question\issue\variables.
> Based on the fact\assumption that there is a possibility for two
> answers\solutions to the same unknowns+function we can use a function to
> describe more then one number. And in the case of computers which everything
> is some kind of a number we can convert the unknown numbers to octets.
> Once there is no difference between numbers and\or octets and letters and we
> are in the function computation world. There we can use all sorts of
> functions\equations in order to describe all sorts of numbers and by that
> letters.
> Eventually hashes are some kind of known functions which implements some way
> to reflect very big numbers or very big documents in some kind of output .
> Technically speaking it’s some function\method that is guaranteed to reflect
> very big numbers with probability(high or low) that multiple input values
> will be reflected with the same output number(128 bits for example).
> In many levels of applications some hashes such as crc32\md5\sha-1\others
> are being used and these applications allow them-self  to validate content
> integrity with a fully “vulnerable” hash due to the fact that the validated
> content  do not exceed the function collision sizes.
> I must admit that I have used MD5 and many other hashes for a very long time
> and the only collisions that I have seen that affected real world
> applications integrity are that of CRC32 hashes, maybe I have not seen
> enough yet!
> And couple expert words from Professor Gideon Samid on hashing:
> [https://www.youtube.com/watch?v=yXmNmckX4sI]
>     Disclaimer: I am not a cryptography expert!
> This RPMs release was tested for:
>     ICAP 204\206 compatibility (non ssl)
>     ECAP passthru adapter which digest response body using SHA256
>     refresh_pattern variations
>     StoreID patterns
>     Basic load testing
>     Basic ssl-bump usage in strict forward proxy mode
>     Basic denial of memory leaks on a long period time of operation
>     Basic build tests
> All the above was done on a CentOS 7 x86_64 VMs.
> I have not tested everything on CentOS 6 since it is assumed that if it
> works good on CentOS 7 there should not be a special reason for it to now
> work on CentOS 6.
> More details about the repository at squid-wiki.
> All The Bests,
> Eliezer Croitoru
>     I have been working on “Store ID – The hackers side of the
> feature“[http://wiki.squid-cache.org/Features/StoreID/Hacking]
>     And I am planning an update to “Caching Dynamic Content using
> Adaptation” (which will not include ways to cache
> youtube)[http://wiki.squid-cache.org/ConfigExamples/DynamicContent/Coordinator]
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