Public and Private keys incorrect for user

I have wordpress 3.8 on centos 6.3 installed in
/home/wp

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The directory is the home directory for wp-user
I have tried all the way to configure the wordpress ssh to install pliugins but I am always getting:
Public and Private keys incorrect for wp-user

The directory of wp-user is:
drwxr-xr-x   5 wp-user wp-user 4096 Jan 30 11:10 .
drwx------   2 wp-user wp-user 4096 Jan 30 11:10 .ssh
-rw-------   1 wp-user wp-user 4498 Jan 30 11:10 .viminfo
drwxr-xr-x   5 wp-user wp-user 4096 Jan 30 11:10 wordpress
-rw-------   1 wp-user wp-user  445 Jan 30 10:56 .bash_history
-rw-r-----   1 wp-user wp-user 1743 Jan 30 10:51 id_rsa
-rw-r-----   1 wp-user wp-user  400 Jan 30 10:51 id_rsa.pub
drwxr-xr-x   2 wp-user wp-user 4096 Jan 30 10:49 .vim
drwxr-xr-x. 10 root    root    4096 Jan 30 10:31 ..
-rw-r--r--   1 wp-user wp-user   18 Jul 18  2013 .bash_logout
-rw-r--r--   1 wp-user wp-user  176 Jul 18  2013 .bash_profile
-rw-r--r--   1 wp-user wp-user  124 Jul 18  2013 .bashrc

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The permissions of the authorized_keys:
-rw-r--r-- 1 wp-user wp-user  400 Jan 30 11:10 authorized_keys

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The contents of the authorized_keys:
from="127.0.0.1" ssh-rsa xxxxxxx == wp-user@mydomain.com

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The contents of the id_rsa.pub
ssh-rsa xxxxxxx == wp-user@mydomain.com

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Config in wp-config.php
efine( 'FTP_BASE', '/home/wp/wordpress/' );
define( 'FTP_CONTENT_DIR', '/home/wp/wordpress/wp-content/' );
define( 'FTP_PLUGIN_DIR ', '/home/wp/wordpress/wp-content/plugins/' );
define( 'FTP_PUBKEY', '/home/wp/id_rsa.pub' );
define( 'FTP_PRIKEY', '/home/wp/id_rsa' );
define( 'FTP_USER', 'wp-user' );
define( 'FTP_PASS', 'passphrase' );
define( 'FTP_HOST', '127.0.0.1:22' );

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How can I solve this issue?
Ashraf HassaneinAsked:
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MazdajaiCommented:
Try moving the keys into .ssh and make the private key to 600.

define( 'FTP_PUBKEY', '/home/wp/.ssh/id_rsa.pub' );
define( 'FTP_PRIKEY', '/home/wp/.ssh/id_rsa' );

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If all fail generate a fresh pair of keys and copy to authorized_keys.
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MazdajaiCommented:
1 authorized_keys needs to be 600, try
chmod 600 authorized_keys

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2. Use mds5sum to compare the authorized_keys and id_rsa.pub. If this is your only pub key on authorized_key they should match.

If it still fails post a verbose ssh session by invoking the -vvv flag

ssh -vvv host

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Ashraf HassaneinAuthor Commented:
I have changed the permissions of the authorized_keys and check the mds5sum for both the authorized_keys and id_rsa.pub and they are indentical, when I did ssh -vvv host for the command line it worked perfectly I believe that there is something the WP config then.
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MazdajaiCommented:
when I did ssh -vvv host for the command line it worked perfectly

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If you can login passwordless then the keys are fine. Are you getting the same error or different error?
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Ashraf HassaneinAuthor Commented:
Yes the same error!
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MazdajaiCommented:
Can you post the commands you trying to run and the exact error?
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Ashraf HassaneinAuthor Commented:
From the linux level I do not have any error I can ssh to the local host with no password, but my problem is with the wordpress when it tries to use SSH it gives this only vague error:

 Public and Private keys incorrect for wp-user

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Ashraf HassaneinAuthor Commented:
Thank you so much for your help, this indeed help, also I have changed the permissions for the .ssh to:
chmod 755 .ssh

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drwxr-xr-x   2 wp-user wp-user     4096 Feb  1 07:53 .ssh

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And the Contents of .ssh to:
chmod 644 .ssh/id_rsa

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-rw-r----- 1 wp-user wp-user  400 Feb  1 07:53 id_rsa.pub
-rw------- 1 wp-user wp-user  417 Jan 31 21:30 authorized_keys
-rw-r--r-- 1 wp-user wp-user  391 Jan 31 21:30 known_hosts
-rw-r--r-- 1 wp-user wp-user 1675 Jan 31 21:22 id_rsa

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And surprisingly it is working thanks for your help.
However the ssh from the linux command line is not working but that not a problem or you think it is a security hole?
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Ashraf HassaneinAuthor Commented:
Great and helpful solution
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MazdajaiCommented:
.ssh needs to be .700.  If you continue having an issue with ssh and keys, I would suggest opening a new thread.
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