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UUID

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Sebastian Bergmann

10 years ago
In PHP 7.0 we introduced random_bytes() which wraps Linux's getrandom(2) as well as Windows's CryptGenRandom() and uses /dev/urandom as a fallback. I think it would be great if we added a function that wraps /proc/sys/kernel/random/uuid [2] and, if that exists, its equivalent on Windows to make the generation of UUIDs easy. Thoughts?

Pierre Joye

10 years ago
On Apr 12, 2016 1:09 PM, "Sebastian Bergmann" <sebastian@php.net> wrote:
> > In PHP 7.0 we introduced random_bytes() which wraps Linux's getrandom(2) > as well as Windows's CryptGenRandom() and uses /dev/urandom as a fallback. > > I think it would be great if we added a function that wraps > /proc/sys/kernel/random/uuid [2] and, if that exists, its equivalent on > Windows to make the generation of UUIDs easy. > > Thoughts?
Alternatively and maybe more portable, libuuid (should be part of all decent systems too) could be a first choice. BSD also provides compliant APIs as part of their libc (https://www.freebsd.org/cgi/man.cgi?query=uuid for freebsd f.e.). On Windows UuidCreate and UuidToString should do it but I did not check their compliance yet. For the reference here: by compliant, I mean compliant with https://tools.ietf.org/html/rfc4122 Cheers, Pierre

Pierre Joye

10 years ago
On Tue, Apr 12, 2016 at 2:52 PM, Pierre Joye <pierre.php@gmail.com> wrote:
> On Apr 12, 2016 1:09 PM, "Sebastian Bergmann" <sebastian@php.net> wrote: >> >> In PHP 7.0 we introduced random_bytes() which wraps Linux's getrandom(2) >> as well as Windows's CryptGenRandom() and uses /dev/urandom as a fallback. >> >> I think it would be great if we added a function that wraps >> /proc/sys/kernel/random/uuid [2] and, if that exists, its equivalent on >> Windows to make the generation of UUIDs easy. >> >> Thoughts? > > Alternatively and maybe more portable, libuuid (should be part of all > decent systems too) could be a first choice.
Forgot to mention: https://pecl.php.net/package/uuid
> BSD also provides > compliant APIs as part of their libc > (https://www.freebsd.org/cgi/man.cgi?query=uuid for freebsd f.e.). On > Windows > > UuidCreate and UuidToString should do it but I did not check their > compliance yet. > > For the reference here: by compliant, I mean compliant with > https://tools.ietf.org/html/rfc4122 > > > Cheers, > Pierre
-- Pierre @pierrejoye | http://www.libgd.org

Matteo Beccati

10 years ago
Hi, On 12/04/2016 09:59, Pierre Joye wrote:
>> Alternatively and maybe more portable, libuuid (should be part of all >> decent systems too) could be a first choice. > > Forgot to mention: https://pecl.php.net/package/uuid > >> BSD also provides >> compliant APIs as part of their libc >> (https://www.freebsd.org/cgi/man.cgi?query=uuid for freebsd f.e.).
I have worked on the addition of Linux libuuid + BSD support to Postgres 9.4 to the existing (deprecated) uuid-ossp a couple of years back. I pretty sure we can reuse some of that investigation / code for php too. Cheers
-- Matteo Beccati Development & Consulting - http://www.beccati.com/

Leszek Krupiński

10 years ago
On Tuesday, April 12, 2016, Pierre Joye <pierre.php@gmail.com> wrote:
> On Apr 12, 2016 1:09 PM, "Sebastian Bergmann" <sebastian@php.net > <javascript:;>> wrote: > > > > In PHP 7.0 we introduced random_bytes() which wraps Linux's getrandom(2) > > as well as Windows's CryptGenRandom() and uses /dev/urandom as a > fallback. > > > > I think it would be great if we added a function that wraps > > /proc/sys/kernel/random/uuid [2] and, if that exists, its equivalent on > > Windows to make the generation of UUIDs easy. > > > > Thoughts? > > Alternatively and maybe more portable, libuuid (should be part of all > decent systems too) could be a first choice. BSD also provides > compliant APIs as part of their libc > (https://www.freebsd.org/cgi/man.cgi?query=uuid for freebsd f.e.). On > Windows > >
I have partially implemented bindings for libuuid into the core, I can finish it if you will. --Leszek

Colin O'Dell

10 years ago
On Tue, Apr 12, 2016 at 2:09 AM Sebastian Bergmann <sebastian@php.net> wrote:
> In PHP 7.0 we introduced random_bytes() which wraps Linux's getrandom(2) > as well as Windows's CryptGenRandom() and uses /dev/urandom as a fallback. > > I think it would be great if we added a function that wraps > /proc/sys/kernel/random/uuid [2] and, if that exists, its equivalent on > Windows to make the generation of UUIDs easy. > > Thoughts? >
I'd love to see UUID generation in core using a similar platform-based approach, as long as the implementation matches RFC 4122. Part of this will be determining which versions/variants should be supported: https://en.wikipedia.org/wiki/Universally_unique_identifier#RFC_4122_Variant Version 4 (random) UUIDs is an obvious choice, but should any others be supported initially? Perhaps the implementation could be a simple function named random_uuid() which either takes no parameters or a single parameter "$version" which defaults to 4? Regards, Colin

Pierre Joye

10 years ago
On Apr 12, 2016 7:56 PM, "Colin O'Dell" <colinodell@gmail.com> wrote:
> > On Tue, Apr 12, 2016 at 2:09 AM Sebastian Bergmann <sebastian@php.net> > wrote: > > > In PHP 7.0 we introduced random_bytes() which wraps Linux's getrandom(2) > > as well as Windows's CryptGenRandom() and uses /dev/urandom as a
fallback.
> > > > I think it would be great if we added a function that wraps > > /proc/sys/kernel/random/uuid [2] and, if that exists, its equivalent on > > Windows to make the generation of UUIDs easy. > > > > Thoughts? > > > > I'd love to see UUID generation in core using a similar platform-based > approach, as long as the implementation matches RFC 4122. Part of this > will be determining which versions/variants should be supported: >
https://en.wikipedia.org/wiki/Universally_unique_identifier#RFC_4122_Variant
> > Version 4 (random) UUIDs is an obvious choice, but should any others be > supported initially? > > Perhaps the implementation could be a simple function named random_uuid() > which either takes no parameters or a single parameter "$version" which > defaults to 4?
I would prefer not to refer to random to avoid any confusion with the recent added random function. As uuid is not crypto safe and is not aimed to. Users will then hopefully not think about using instead of the random api. Also uuid alone may be a problem (bc?) It sounds like a logical choice. Alternatively uuid_create (). Cheers Pierre

Colin O'Dell

10 years ago
> > I would prefer not to refer to random to avoid any confusion with the > recent added random function. As uuid is not crypto safe and is not aimed > to. Users will then hopefully not think about using instead of the random > api. > > Also uuid alone may be a problem (bc?) It sounds like a logical choice. > Alternatively uuid_create (). >
Ah yes, good point. I was thinking random_uuid() might be good for v4 UUIDs, and that a parameter might be needed, but I failed to make the connection that not all UUID versions are random - my apologies for not catching that before hitting send. I like the idea of uuid() or uuid($version = 4)

Remi Collet

10 years ago
Perhaps, no need to reinvent the wheel... There is already 2 uuid extensions - the one provided in the libuuid sources - the pecl one : https://pecl.php.net/package/uuid No need to create more confusion. If something missing, just add it in the existing pecl ext. If needed, open a RFC to merge the extension in php. Remi.

Pierre Joye

10 years ago
On Tue, Apr 12, 2016 at 8:40 PM, Remi Collet <remi@fedoraproject.org> wrote:
> Perhaps, no need to reinvent the wheel... > > There is already 2 uuid extensions > > - the one provided in the libuuid sources > - the pecl one : https://pecl.php.net/package/uuid > > No need to create more confusion. > > If something missing, just add it in the existing pecl ext. > > If needed, open a RFC to merge the extension in php.
This is why I referred to this extension and lib. However they are only based on libuuid. We still need to support windows and I would prefer to use libc's uuid for BSD. I think pecl's uuid could be good start to make it more portable across system. The API is already clear (generation and comparison, not sure we need much more). I am not sure either about the various platforms and what they support in term of UUID versions. We have to clarify this point before anything can be merged. Cheers,
-- Pierre @pierrejoye | http://www.libgd.org