Encrypt a password the same way mysql does

Question

I've created a user ... but forgotten the password

mysql> create user 'blayo'@'%' identified by 'right';

Which Linux command line tool can encrypt the password the same way mysql 5.5 does ?

mysql> select Password,User from mysql.user
------------------------------------------+-------+
*920018161824B14A1067A69626595E68CB8284CB | blayo |

...to be sure I use the right one

$ tool right
*920018161824B14A1067A69626595E68CB8284CB

Answer 1

Some one-liners:

MySQL (may require you add -u(user) -p):

mysql -NBe "select password('right')"

Python:

python -c 'from hashlib import sha1; print "*" + sha1(sha1("right").digest()).hexdigest().upper()'

Perl:

perl -MDigest::SHA1=sha1_hex -MDigest::SHA1=sha1 -le 'print "*". uc sha1_hex(sha1("right"))'

PHP:

php -r 'echo "*" . strtoupper(sha1(sha1("right", TRUE))). "\n";'

Ruby:

ruby -e 'require "digest/sha1"; puts "*" + Digest::SHA1.hexdigest(Digest::SHA1.digest("right")).upcase'

All output:

*920018161824B14A1067A69626595E68CB8284CB

Answer 2

Well, the trivial (perhaps cheating) way would be to run:

mysql -NBe "select password('right')"

This will produce a password using whatever password hashing scheme your version of mysql uses. [EDIT: added -NB, which gets rid of the column names and ascii table art.]

Answer 3

One more using the shell:

echo -n 'right' | sha1sum | xxd -r -p |\
sha1sum | tr '[a-z]' '[A-Z]' | awk '{printf "*%s", $1}'

Explanation:

1. echo -n print without linebreak
2. sha1sum first SHA1
3. xxd -r -p unhex the hash
4. sha1sum second SHA1
5. tr '[a-z]' '[A-Z]' convert to uppercase
6. awk '{print "*" $1}' add leading *

More details:

Between 2. and 3. an optional awk '{printf "%s", $1}' step could be insterted for newline- and hyphen-removal. But xxd will ignore them anyway (Thanks to dave_thompson_085).

Furthermore step 5 and 6 could be done at once by replacing them with {print "*" toupper($1)} (Thanks to dave_thompson_085).

Answer 4

It still kind of blows my mind that MySQL doesn't bother obfuscating passwords on the command line and in logs. And that's the only reason I'm adding an answer rather than just commenting on @Gilles answer.

So, of course, you could just log into MySQL as an admin and set a new password for your blayo user, as @patrix suggested.

However, the standard way to do that is by using MySQL's password() function, which takes a plaintext password as an argument (seriously?).

If you do that, you leave the plaintext version of your MySQL user's password sitting around in your bash history and in your MySQL logs, for easy retrieval later on by whoever manages to get access to those log files.

Wouldn't it be better to have a little utility that would prompt for the password, without echoing it to the screen or to your logs, then provide you with the resulting MySQL-compatible hash?

So, modifying @Gilles's answer just a bit, how about a little shell script that uses Python, like the following. You could easily modify this to run a SQL statement against your MySQL database to set the password all at once. But even without going that far, just copy and paste the resulting hash into a SQL statement to update the users table:

#!/bin/bash

mysqlpwd=$(/usr/bin/python -c 'from hashlib import sha1; import getpass; print "*" + sha1(sha1(getpass.getpass("New MySQL Password:")).digest()).hexdigest()')

echo $mysqlpwd

Answer 5

The hash is sha1(sha1(password)). Since there is no salt (which is a grave security flaw), you can look up the hash in a table.

With just POSIX tools plus sha1sum from GNU coreutils or BusyBox, sha1(sha1(password)) is annoying to compute because the sha1sum command prints out the digest in hexadecimal and there is no standard tool to convert to binary.

awk "$(printf %s 'right' | sha1sum |
       sed -e 's/ .*//' -e 's/../, 0x&/g' \
           -e 's/^/BEGIN {printf "%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c"/' \
           -e 's/$/; exit}/')" | sha1sum

Python has standard digests in its standard libraries, so it's a simple one-liner.

printf %s 'right' |
python -c 'from hashlib import sha1; import sys; print sha1(sha1(sys.stdin.read()).digest()).hexdigest()'

Or with the password inside the one-liner:

python -c 'from hashlib import sha1; print sha1(sha1("right").digest()).hexdigest()'

Answer 6

Another using the shell

echo -n 'right' | openssl sha1 -binary | openssl sha1 -hex | \
    sed 's/^.* //' | \
    awk '{print "*"toupper($0)}'

...which outputs:

*920018161824B14A1067A69626595E68CB8284CB

Answer 7

If you crated a user and forgotten the password this is what you should do and it's easier.

This also happened to me a dozen times while I was doing 10 billion things at once. The best way that I recovered my password was:

stopped the mysql server completely first

issued mysqld_safe --skip-grant-tables &

then I logged in as root without issuing a password, just mysql -u mysql-user (it lets you in after the mysqld_safe)

then go to the mysql > user table and update the password for the user

then go back and restart mysql

see if that works and let us know.

Answer 8

MySQL 4.1+ uses double SHA1

> SELECT PASSWORD("right")
*920018161824B14A1067A69626595E68CB8284CB

> SELECT SHA1(UNHEX(SHA1("right")))
920018161824B14A1067A69626595E68CB8284CB

sh-3.2# php -r 'echo "*" . sha1(sha1("right", TRUE)). "\n";'
*920018161824b14a1067a69626595e68cb8284cb

This algorithm can be easily ported to other languages​​. A difference is that password hashes in the "select password" always begin with a “*” character.

Answer 9

Python3 one liner, in case it's useful to anyone:

python3 -c 'from hashlib import sha1; print(f"""*{sha1(sha1("right".encode()).digest()).hexdigest().upper()}""")'

*920018161824B14A1067A69626595E68CB8284CB