Mysql password hashing method old vs new

问题:

I'm trying to connect to a mysql server at dreamhost from a php scrip located in a server at slicehost (two different hosting companies). I need to do this so I can transfer new data at slicehost to dreamhost. Using a dump is not an option because the table structures are different and i only need to transfer a small subset of data (100-200 daily records) The problem is that I'm using the new MySQL Password Hashing method at slicehost, and dreamhost uses the old one, So i get

$link = mysql_connect($mysqlHost, $mysqlUser, $mysqlPass, FALSE); 

Warning: mysql_connect() [function.mysql-connect]: OK packet 6 bytes shorter than expected
Warning: mysql_connect() [function.mysql-connect]: mysqlnd cannot connect to MySQL 4.1+ using old authentication
Warning: mysql_query() [function.mysql-query]: Access denied for user 'nodari'@'localhost' (using password: NO) 

facts:

• I need to continue using the new method at slicehost and i can't use an older php version/library
• The database is too big to transfer it every day with a dump
• Even if i did this, the tables have different structures
• I need to copy only a small subset of it, in a daily basis (only the changes of the day, 100-200 records)
• Since the tables are so different, i need to use php as a bridge to normalize the data
• Already googled it
• Already talked to both support stafs

The more obvious option to me would be to start using the new MySQL Password Hashing method at dreamhost, but they will not change it and i'm not root so i can't do this myself.

Any wild idea?

By VolkerK sugestion:

mysql> SET SESSION old_passwords=0;
Query OK, 0 rows affected (0.01 sec)

mysql> SELECT @@global.old_passwords,@@session.old_passwords, Length(PASSWORD('abc'));
+------------------------+-------------------------+-------------------------+
| @@global.old_passwords | @@session.old_passwords | Length(PASSWORD('abc')) |
+------------------------+-------------------------+-------------------------+
|                      1 |                       0 |                      41 |
+------------------------+-------------------------+-------------------------+
1 row in set (0.00 sec)

The obvious thing now would be run a mysql> SET GLOBAL old_passwords=0; But i need SUPER privilege to do that and they wont give it to me

if I run the query

SET PASSWORD FOR 'nodari'@'HOSTNAME' = PASSWORD('new password');

I get the error

ERROR 1044 (42000): Access denied for user 'nodari'@'67.205.0.0/255.255.192.0' to database 'mysql'

I'm not root...

The guy at dreamhost support insist saying thet the problem is at my end. But he said he will run any query I tell him since it's a private server. So, I need to tell this guy EXACTLY what to run. So, telling him to run

SET SESSION old_passwords=0;
SET GLOBAL old_passwords=0;
SET PASSWORD FOR 'nodari'@'HOSTNAME' = PASSWORD('new password');
grant all privileges on *.* to nodari@HOSTNAME identified by 'new password';

would be a good start?

回答1:

Yeah, that looks like a toughie. Without cooperation from your hosts or the ability to change password formats or client libraries, you don't have a lot of options.

Honestly, my first choice would be to ditch Dreamhost. That's probably a lot of work, but if they're going to be stuck using old incompatible stuff, it will continue to be problematic.

If that's not an option, what about a joint automated process? You could export the data on the Slicehost side into a CSV file and massage it into whatever format is necessary for Dreamhost, and then upload it to the Dreamhost server. You could have a cron script on the Dreamhost server check periodically for the uploaded file and process it (making sure to move or delete it after it was successfully processed).

回答2:

On some conditions you may still be able to set and use a "new hashing algorithm password".
MySQL 4.1+ servers are able to handle both login algorithms. Which one is used is independent from the old-passwords variable. If MySQL finds a 41 character long hash starting with * it uses the new system. And the PASSWORD() function is also able to use both algorithms. If the field mysql.user.Password is wide enough to store 41 characters and the old-passwords variable is 0 it will create a "new" password. The documention for old_passwords says Variable Scope Both so you might be able to change it for your session.
Connect to the MySQL server (with a client that is able to do so despite the global old_passwords=1), e.g. HeidiSQL and try the following:

SET SESSION old_passwords=0;
SELECT @@global.old_passwords,@@session.old_passwords, Length(PASSWORD('abc'));

If it prints 1, 0, 41 (meaning the global old_passwords is on, but for the session it's off and PASSWORD() returned a "new" password) you should be able to set a new password using the new algorithm for your account within the same session.

But if dreamhost really wants to disable the new passwords algorithm the mysql.user.Password field will be less than 41 characters long and there's nothing you can do about it (except nagging them).

回答3:

I just had this issue, and was able to work around it.

First, connect to the MySQL database with an older client that doesn't mind old_passwords. Connect using the user that your script will be using.

Run these queries:

SET SESSION old_passwords=FALSE;
SET PASSWORD = PASSWORD('[your password]');

In your PHP script, change your mysql_connect function to include the client flag 1:

define('CLIENT_LONG_PASSWORD', 1);
mysql_connect('[your server]', '[your username]', '[your password]', false, CLIENT_LONG_PASSWORD);

This allowed me to connect successfully.

回答4:

I would solve this by dumping the data at Slicehost, using SELECT ... INTO OUTFILE.

This allows you to design your query to make sure the output is in the format matching the table structure at the destination site.

Then transfer the dump file to Dreamhost and use LOAD DATA INFILE.

As an aside, Dreamhost is really still using MySQL 4.0? They're extremely outdated -- even MySQL 4.1's extended support is expiring this month (December 2009).

回答5:

I think you should make WebServices/RPC from slicehost and write the corresponding service on the to handle it.

回答6:

I had the same issue. To solve it, I did the following:

SET PASSWORD = PASSWORD('[your password]');