Posted
by Doodle
on Stack Overflow
See other posts from Stack Overflow
or by Doodle
Published on 2010-05-11T11:17:15Z
Indexed on
2010/05/11
11:34 UTC
Read the original article
Hit count: 321
What are the proper settings for storing a password that has been run through sha1?
© Stack Overflow or respective owner
as seen on Stack Overflow
- Search for 'Stack Overflow'
To generate a valid pairwise master key for a WPA2 network a router uses the PBKDF2-HMAC-SHA1 algorithm. I understand that the sha1 function is performed 4096 times to derive the PMK, however I have two questions about the process.
Excuse the pseudo code.
1) How is the input to the first instance…
>>> More
as seen on Stack Overflow
- Search for 'Stack Overflow'
Given two different strings S1 and S2 (S1 != S2) is it possible that:
SHA1(S1) == SHA1(S2)
is True?
If yes - with what probability? Is there a upper bound on the length of a string, for which probably of getting duplicates is 0?
If not - why not?
Thanks
>>> More
as seen on Stack Overflow
- Search for 'Stack Overflow'
My problem is a bit hairy, and I may be asking the wrong questions, so please bear with me...
I have a legacy MySQL database which stores the user passwords & salts for a membership system. Both of these values have been hashed using the Ruby framework - roughly like this:
hashedsalt =
…
>>> More
as seen on Stack Overflow
- Search for 'Stack Overflow'
It is known that
1. if ( md5(a) == md5(b) )
2. then ( md5(a.z) == md5(b.z) )
3. but ( md5(z.a) != md5(z.b) )
where the dots concatenate the strings.
What happens in the second row if we change all the md5 to sha1? So:
1. if ( sha1(c) == sha1(d) )
2. then ( sha1(c.z)…
>>> More
as seen on Stack Overflow
- Search for 'Stack Overflow'
hi all,
i want to generate HMAC-SHA1 of NSString type variable. I see the post but this method give me error in CCHmac(kCCHmacAlgSHA256, cKey, strlen(cKey), cData, strlen(cData), cHMAC);
and
NSString *hash = [HMAC base64Encoding];
line.
Please suggest how can I generate the HMAC-SHA1 of any string…
>>> More
as seen on Ask Ubuntu
- Search for 'Ask Ubuntu'
I tried everything till now:
sudo apt-get remove mysql-server mysql-client mysql-common
sudo apt-get purge mysql-server mysql-client mysql-common
sudo apt-get autoremove
and even more commands...
But whenever I am trying to locate mysql. I get a no. of files related to mysql
command:
shell>>…
>>> More
as seen on Server Fault
- Search for 'Server Fault'
Mysql was started:
/usr/bin/mysqld_safe --datadir=/srv/mysql/myDB --log-error=/srv/mysql/logs/mysqld-myDB.log --pid-file=/srv/mysql/pids/mysqld-myDB.pid --user=mysql --socket=/srv/mysql/sockets/mysql-myDB.sock --port=3700
but when I'm trying to do something:
ERROR 1548 (HY000) at line 1: Cannot…
>>> More
as seen on Server Fault
- Search for 'Server Fault'
A client of my IT-consulting service owns a web-development shop. He's been having problems with a Slackware 12.0 server running MySQL 5.0.67. The machine was set up by the client's sysadmin, who left on bad terms. My client no longer employs a sysadmin.
As far as I can tell, the only copy of MySQL…
>>> More
as seen on Server Fault
- Search for 'Server Fault'
Can't start mysql with:
sudo /usr/bin/mysqld_safe --datadir=/srv/mysql/myDB --log-error=/srv/mysql/logs/mysqld-myDB.log --pid-file=/srv/mysql/pids/mysqld-myDB.pid --user=mysql --socket=/srv/mysql/sockets/mysql-myDB.sock --port=3700
120222 13:40:48 mysqld_safe Starting mysqld daemon with databases…
>>> More
as seen on SQL Authority
- Search for 'SQL Authority'
MySQL is one of the most popular database language and I have been recently working with it a lot. Data have no barrier and every database have their own place. I have been working with MySQL for quite a while and just like SQL Server, I often find lots of people asking me if I have a tutorial which…
>>> More
