How to change hash password in mysql
How I will make every password in my user table encrypted(md5()) except one particular row using a single query? Show asked Apr 1, 2009 at 5:39
1
I will say though that MD5 isn't a very good level of encryption and you should consider something stronger such as ENCRYPT with a custom salt. Read about it here EDIT: Looks like the original question changed. Here's the altered query to accomodate
EDIT: Worth noting MD5 Encryption Hacked answered Apr 1, 2009 at 5:41
jerebearjerebear 6,3634 gold badges30 silver badges38 bronze badges 9 Hash Functions in MySQLThere are a lot more hash functions than MD5 to use for storing passwords in you MySQL database. Save Password (hash):
Check Password:
If the result is > 0, the user provided the correct password. answered Apr 1, 2009 at 8:23
guerdaguerda 22.7k26 gold badges93 silver badges144 bronze badges When hashing passwords, do not forget to salt them, so that same passwords do not yield same hashes:
answered Apr 1, 2009 at 15:58
QuassnoiQuassnoi 402k89 gold badges605 silver badges606 bronze badges 1 Concerning you edit: do you have an ID or username that identifies this row?
answered Apr 1, 2009 at 8:13 1 Edited in response to edit in OP.
answered Apr 1, 2009 at 5:42
lc.lc. 111k20 gold badges156 silver badges185 bronze badges 2
I think it is a little bit more update
or
Hope this help answered Jan 15, 2015 at 9:53
ackuserackuser 5,3125 gold badges37 silver badges46 bronze badges 1 6.1.2.4 Password Hashing in MySQLNote The information in this section applies only for accounts that use the MySQL lists user accounts in the MySQL uses passwords in two phases of client/server communication:
In other words, the server checks hash values during authentication when a client first attempts to connect. The server generates hash values if a connected
client invokes the Password hashing methods in MySQL have the history described following. These changes are illustrated by changes in the result from the The Original (Pre-4.1) Hashing MethodThe original hashing method produced a 16-byte string. Such hashes look like this:
To store account passwords, the The 4.1 Hashing MethodMySQL 4.1 introduced password hashing that provided better security and reduced the risk of passwords being intercepted. There were several aspects to this change:
The changes in MySQL 4.1 took place in two stages:
Compatibility Issues Related to Hashing Methods The widening of the
The 4.1 hashing method is understood only by MySQL 4.1 (and higher) servers and clients, which can result in some compatibility problems. A 4.1 or higher client can connect to a pre-4.1 server, because the client understands both the pre-4.1 and 4.1 password hashing methods. However, a pre-4.1 client that attempts to connect to a 4.1 or higher server may run into difficulties. For example, a 4.0 mysql client may fail with the following error message:
The following discussion describes the differences between the pre-4.1 and 4.1 hashing methods, and what you should do if you upgrade your server but need to maintain backward compatibility with pre-4.1 clients. (However, permitting connections by old clients is not recommended and should be avoided if possible.) Additional information can be found in Section B.3.2.4, “Client does not support authentication protocol”. This information is of particular importance to PHP programmers migrating MySQL databases from versions older than 4.1 to 4.1 or higher. The differences between short and long password hashes are relevant both for how the server uses passwords during authentication and for how it generates password hashes for connected clients that perform password-changing operations. The way in which the server uses password hashes during authentication is affected by the width of the
Even for short-hash accounts, the authentication process is actually a bit more secure for 4.1 and later clients than for older clients. In terms of security, the gradient from least to most secure is:
The way in which the server generates
password hashes for connected clients is affected by the width of the Those conditions apply as follows:
The purpose of the
This scenario illustrates that, if you must support older pre-4.1
clients, it is problematic to run a 4.1 or higher server without The downside of
The following scenarios are possible in MySQL 4.1 or later. The factors are whether the Scenario 1: Short
This scenario occurs when a pre-4.1 MySQL installation has been upgraded to 4.1 or later but mysql_upgrade has not been run to upgrade the system tables in the Scenario 2: Long
In this scenario, newly created accounts have
short password hashes because To create a new account that has a long password hash, or to change the password of any existing account to use a long hash, first set the session value of
In this scenario, the server has an up to date Scenario 3: Long
As indicated earlier, a danger in this scenario is that it is possible for accounts that have a short password hash to become inaccessible to pre-4.1 clients. A change to such an account's password
made using the If this is a problem, you can change a password in a special way. For example, normally you use
To change the password but create a short hash, use the
The disadvantages for each of the preceding scenarios may be summarized as follows: In scenario 1, you cannot take advantage of longer hashes that provide more secure authentication. In scenario 2,
In scenario 3,
accounts with short hashes become inaccessible to pre-4.1 clients if you change their passwords without explicitly using The best way to avoid compatibility problems related to short password hashes is to not use them:
How do I change my encrypted password in MySQL?Please follow the below mentioned steps to change a User Password for MySQL Database:. Step 1: Open MySQL Console or use PhpMyAdmin.. Step 2: Log-in by typing at the Shell prompt [Using CLI] ... . Step 3: Type the root password. ... . Step 4: mysql>show databases; ... . Step 5: mysql>use mysql; ... . Step 6: mysql>show tables;. What is MySQL password hash?The MySQL PASSWORD function is used by the authentication system in MySQL to generate a hashed password from a plaintext password string using more powerful hashing techniques that were introduced in MySQL 4.1. To use older hashing techniques, use the OLD_PASSWORD function.
Where are MySQL password hashes stored?The password hashes are stored in the user table of the mysql database. The table files themselves are typically stored in a tree structure under /var/lib/mysql , but that location can be modified by build options or run-time configuration.
How do I change a user password in MySQL?Enter your credentials and press Log in.. Under the Databases section, click the MySQL Databases icon.. Scroll down to the Current Users section. Locate the user whose password you want to change, and click Change Password.. Enter and confirm a new password, then click Change Password to save it.. A Success prompt appears.. |