both getsha1 aa and getsha1 ,aa return the same result so that I am OK with
it. ymmv.
On Jul 16, 2014 4:48 AM, "'Pascal Jasmin' via Programming" <
[email protected]> wrote:
> I'm unsure how qt gets distributed on other platforms, but on windows, at
> least with J, the same dll as openssl's hash/encryption function is placed
> in the bin folder, and the strategy of hoping openssl exists on other
> target systems seems reasonable.
>
> there is a difference in the hash obtained from the direct openssl
> function and the libjqt function when you apply it to a multiitem shape.
> It is the same when you do sha of rank1 sha... so one of us probably has
> fills messing things up.
>
> aa =.'asf',"1 (65+ 26 26 26 #:"1 0 i. 26^3) { a.
> sha1 hexhash sha1"1 hexhash aa
> 2ab12374f4827925d7c3260aa22fe96e3b08fcbe
> getsha1 getsha1"1 aa
> 2ab12374f4827925d7c3260aa22fe96e3b08fcbe
>
> sha1 hexhash aa
> b600048b4943c0264408c56c7c8b392207da1cff
> getsha1 aa
> 8b3b7e7cdee149043fcfd5cc5adf67b355d2bd32
>
> The openssl version returns raw binary rather than hex. So its faster if
> the raw binary is useful, or if you would want a transformation (decimal,
> list of 32/64 bit integers, base64/128) other than hex.
>
>
> ts 'sha1"1 aa'
> 9.13521/sec 0.530048MB
> ts 'sha1 hexhash"1 aa'
> 2.20878/sec 1.06778MB
> ts 'getsha1"1 aa'
> 2.69064/sec 1.05856MB
>
>
>
>
> ________________________________
> From: chris burke <[email protected]>
> To: Programming forum <[email protected]>
> Sent: Tuesday, July 15, 2014 3:34:15 PM
> Subject: Re: [Jprogramming] md5
>
>
> The code is from Qt.
>
> From the docs, http://qt-project.org/doc/qt-5/QCryptographicHash.html, Qt
> 5.2 supports MD4, MD5, SHA-1, SHA-224, SHA-256, SHA-384, and SHA-512, so
> your first two can easily be added, except on Linux where we are still
> using Qt 4.8.
>
>
> On Tue, Jul 15, 2014 at 9:19 AM, 'Pascal Jasmin' via Programming <
> [email protected]> wrote:
>
> > May I suggest also sha256 sha512 and ripemd160?
> >
> > I assume the underlying code is from openssl. The reason I did not
> > include md5 there is that it has been baptised insecure/compromised by
> the
> > wiki lords http://en.wikipedia.org/wiki/Cryptographic_hash_function
> . The
> > paper describing the collision attack on md5:
> > http://eprint.iacr.org/2009/223.pdf. Its not a craft any replacement
> > attack/weakness by any means, but its enough to discourage its use in the
> > same sense that "no one ever got fired for buying IBM".
> >
> >
> >
> > ________________________________
> > From: chris burke <[email protected]>
> > To: Programming forum <[email protected]>
> > Sent: Tuesday, July 15, 2014 11:11:01 AM
> > Subject: Re: [Jprogramming] md5
> >
> >
> > getmd5 will be in the next release of JQt (getsha1 is already there).
> >
> > AFAIK, convert/misc/md5 only works on 32-bit.
> >
> >
> > On Mon, Jul 14, 2014 at 7:10 PM, Raul Miller <[email protected]>
> > wrote:
> >
> > > I've been using the convert/misc/md5 addon, but it is rather slow.
> > >
> > > Using it on a 140k string on a moderately sized box was taking between
> 6
> > > and 7 seconds. And I've got a lot of strings for it to grind through
> > (many
> > > gigabytes).
> > >
> > > So I decided I wanted to use compiled code. And, since we don't have a
> J
> > > compiler (yet), I decided to use C:
> > >
> > > The first thing I did was look at the source for the md5 on an ubuntu
> > > system. That's in coreutils, and it was something of a mess.
> > >
> > > After backing off from trying to extract the useful parts of that as a
> > > shared library, I found that RFC 1321 contains a reference
> implementation
> > > (which looks like it was the basis for the mess I was trying to work
> > > with*). That was clean enough that I could rather easily extract it,
> > build
> > > it, and get it to work.
> > >
> > > The result is at https://github.com/rdm/libmd5.so
> > >
> > > The J test suite (
> > https://github.com/rdm/libmd5.so/blob/master/md5test.ijs
> > > )
> > > was also extracted from RFC 1321, except for a couple lines which
> define
> > > the interface to the compiled code).
> > >
> > > Note that I'm using this with j602 (the 32 bit version), because that's
> > the
> > > only version where the sax xml parsing works. And, I've only tested it
> on
> > > ubuntu 14.04 lts. But if someone else needs a fast md5 implementation,
> > > perhaps it won't be too much work to get this working on whatever
> system
> > > you work with.
> > >
> > > FYI,
> > >
> > > --
> > > Raul
> > >
> > > * P.S. I say "mess" because it has been loaded down with so many layers
> > of
> > > config toolchain and abstraction that it's really hard to find where
> > > anything happens. That's fine for some contexts, but useless for
> others.
> > > ----------------------------------------------------------------------
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> >
> >
> >
> > >
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>
>
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