Re: Converting password to old format.
AFAIK, PASSWORD() or OLD_PASSWORD() is one way function, it means in math if you do f(x) = y, you never know x, all you now is the result of f(x) ~ y Moreover, do you have a problem with new password format? Eugene Kosov wrote: Hi, everyone! I have transfer user's database and grants from one mysql server (4.1.15) to an older one (4.0.26). I don't know user's password and have only it's hash. How can I convert hashed password stored in mysql.user.password field to the 4.0 format? Is there something similar to OLD_PASSWORD(), but with 4.1's hashed password as a parameter? Any links, man references, etc. are welcome! Thanks in advance! -- Regards, Eugene Kosov. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: Converting password to old format.
Yes I know restoring plain password from it's hash is impossible (at least in theory ;)) but I don't need password itself. I thought if we know f1(x) (PASSWORD) and f2(x) (OLD_PASSWORD) we possibly can get such f(x) that will make expression f2(x) = f(f1(x)) truth for every x. I haven't any problem with new password format, I just have to move some databases from one server to another. Ady Wicaksono wrote: AFAIK, PASSWORD() or OLD_PASSWORD() is one way function, it means in math if you do f(x) = y, you never know x, all you now is the result of f(x) ~ y Moreover, do you have a problem with new password format? Eugene Kosov wrote: Hi, everyone! I have transfer user's database and grants from one mysql server (4.1.15) to an older one (4.0.26). I don't know user's password and have only it's hash. How can I convert hashed password stored in mysql.user.password field to the 4.0 format? Is there something similar to OLD_PASSWORD(), but with 4.1's hashed password as a parameter? Any links, man references, etc. are welcome! Thanks in advance! -- Regards, Eugene Kosov. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: Converting password to old format.
Sorry, I have no idea about that :) Eugene Kosov wrote: Yes I know restoring plain password from it's hash is impossible (at least in theory ;)) but I don't need password itself. I thought if we know f1(x) (PASSWORD) and f2(x) (OLD_PASSWORD) we possibly can get such f(x) that will make expression f2(x) = f(f1(x)) truth for every x. I haven't any problem with new password format, I just have to move some databases from one server to another. Ady Wicaksono wrote: AFAIK, PASSWORD() or OLD_PASSWORD() is one way function, it means in math if you do f(x) = y, you never know x, all you now is the result of f(x) ~ y Moreover, do you have a problem with new password format? Eugene Kosov wrote: Hi, everyone! I have transfer user's database and grants from one mysql server (4.1.15) to an older one (4.0.26). I don't know user's password and have only it's hash. How can I convert hashed password stored in mysql.user.password field to the 4.0 format? Is there something similar to OLD_PASSWORD(), but with 4.1's hashed password as a parameter? Any links, man references, etc. are welcome! Thanks in advance! -- Regards, Eugene Kosov. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: Converting password to old format.
Eugene Kosov [EMAIL PROTECTED] wrote on 03/23/2006 07:03:15 AM: Hi, everyone! I have transfer user's database and grants from one mysql server (4.1.15) to an older one (4.0.26). I don't know user's password and have only it's hash. How can I convert hashed password stored in mysql.user.password field to the 4.0 format? Is there something similar to OLD_PASSWORD(), but with 4.1's hashed password as a parameter? Any links, man references, etc. are welcome! Thanks in advance! -- Regards, Eugene Kosov. If such a function actually exists, it invalidates the premise that password hashes are only one-way. The algorithms (both pre-4.1 and post-4.1) for generating password hashes are intended to be one-way hashes. Unless you have the original plain-text password, you should not be able to transfer your existing 4.1 users onto the 4.0.26 system. You will need to create new accounts on your 4.0.26 system for the old user names and let them reset their passwords. Sorry! but it's designed to be this way. Shawn Green Database Administrator Unimin Corporation - Spruce Pine
