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Posted by Christopher Pomasl on 10/22/04 11:29
On Thu, 13 Oct 2005 10:35:42 +0200, Axel Schwenke wrote:
> "Dave Moore" <dave_m_moore@post2me.freeserve.co.uk> wrote:
>
>> For development,
>> I've been using Apache, MySQL and PHP installed on my local machine but now
>> I'm having problems porting to my hoster's server.
> ...
>> but there are two problems:
>>
>> 1). Firstly, the MySQL PASSWORD() command give different results on the host
>> than it does on my local machine.
>
>> SELECT PASSWORD ('mypassword')
>>
>> gives a 16 byte number as my books suggest. However, running the same
>> command on the server gives a 41 bytes code!!!. Consequently, all my login
>> functionality does not work!.
> ...
>
>> 2). Secondly, I noticed that phpMyAdmin on the host shows a 'Collation'
>> column with the value 'latin1_swedish_ci'. This column isn't present when
>> using phpMyAdmin on my local machine, even though the DB contents show be
>> identical. So what's that all about??.
>
> As Christian said, you hoster uses a newer MySQL version than you. Both
> features were introduced with MySQL 4.1. I suggest you upgrade your
> development machine to the latest 4.1 version of MySQL.
>
> Regarding PASSWORD(): the MySQL manual [1] strongly discourages from
> using PASSWORD() for your own applications and recommends MD5() or
> SHA1() for password hashing.
>
> Regarding character sets and collations: this is great stuff if one
> wants to build a multilingual website. For a unilingual application
> it's enough to set the defaults for the used tables/databases to the
> right values. I suggest reading the manual [2].
>
>
> [1] http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html
> [2] http://dev.mysql.com/doc/refman/5.0/en/charset.html
>
>
> XL
Correct me if I'm wrong.
Using the MD5() hash hashes the password into an unrecoverable string. So
when you then ask for a password from your user, you need to MD5() the
given password and compare that to the stored hash.
This is what I'm doing but it also causes you to not be able to
recover/discover a password for a user. You can then only reset the
password if the user forgets theirs.
I combine the password with a number of pertinent facts about the user,
name etc, plus a string of my own choosing. I then combine all this stuff
and hash with MD5(), the PHP function not with MySQL, and store the
resulting string in the DB. Then at log in, I pull the DB info for the
user attempting to log in, by userid, and hash this info with the given
password and compare it to the stored password.
Works so far.....
Chris
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