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Date: Mon, 3 Feb 2014 14:08:24 +0900
Message-ID: <CAGa2bXYDExZyGwwf0RPJuzASxgmDic+duFpvN5jB1eCPCYeNJA@mail.gmail.com>
To: Tjerk Meesters <tjerk.meesters@gmail.com>
Cc: Martin Jansen <martin@divbyzero.net>, 
	"internals@lists.php.net" <internals@lists.php.net>
Content-Type: multipart/alternative; boundary=001a1137f67cc9f52804f179857a
Subject: Re: [PHP-DEV] Extending uniqid() or not?
From: yohgaki@ohgaki.net (Yasuo Ohgaki)

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Content-Type: text/plain; charset=UTF-8

Hi Tjerk,

On Mon, Feb 3, 2014 at 1:59 PM, Tjerk Meesters <tjerk.meesters@gmail.com>wrote:

> On Mon, Feb 3, 2014 at 9:13 AM, Yasuo Ohgaki <yohgaki@ohgaki.net> wrote:
>
>> Hi Tjerk,
>>
>> On Mon, Feb 3, 2014 at 8:55 AM, Tjerk Meesters <tjerk.meesters@gmail.com>wrote:
>>
>>> I think it would be good enough to have only uuid v4:
>>>
>>> function uuidv4()
>>> {
>>>     $data = openssl_random_pseudo_bytes(16); // or whatever
>>>
>>>     $data[6] = chr(ord($data[6]) & 0x0f | 0x40); // set version to 0010
>>>     $data[8] = chr(ord($data[8]) & 0x3f | 0x80); // set bits 6-7 to 10
>>>
>>>     return vsprintf('%s%s-%s-%s-%s-%s%s%s', str_split(bin2hex($data),
>>> 4));
>>> }
>>>
>>> It's really just a representation of random data, whereby 6 bits are
>>> used for the actual format.
>>>
>>
>> I agree.
>> UUID v4 simply generate random ID and it is good for many purposes.
>>
>> My concern is portability. OpenSSL(or Mcrypt) is provided as module.
>> Users tends not to use module functions whenever possible. To address
>> this issue, OpenSSL could be a module compiled by default.
>>
>
> You could simply choose between `php_win32_get_random_bytes()` (Windows)
> or reading directly from `/dev/xrandom`. Ultimately you have to be prepared
> to supplement the data (partially or fully) with calls to `php_rand()`.
>

Yes. It can be done this way.
I would like to have full UUID implementation as well as other crypt
features of OpenSSL.

I made a RFC for building OpenSSL module by default.
https://wiki.php.net/rfc/build-openssl-by-default
I'll post it in new thread later.

Regards,

--
Yasuo Ohgaki
yohgaki@ohgaki.net

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