Mark,

thanks you, now I understand how it is build.

I think that I have to use plain MD5 without salt if I want to use DIGEST 
authentication. Tomcat 8 documentation should say that people have to use "-s 
0" flag and copy md5 just after the last $-sign.

Mit freundlichen Grüßen
Igor Mukhin

-----Ursprüngliche Nachricht-----
Von: Mark Thomas [mailto:ma...@apache.org]
Gesendet: Montag, 16. März 2015 12:17
An: Tomcat Users List
Betreff: Re: digest.bat -a MD5 in Tomcat 8

On 16/03/2015 10:22, Igor Mukhin wrote:
> Hello,
>
> I just tried to execute on Tomcat 8.0.20 :
> digest.bat -a MD5 myusername:myrealm:mypassword and it replyed with:
>
> myusername:myrealm:mypassword:283c7c0d977648d4dc3def5a20e2a595701a7542
> 44baec7153d40e8ee30ff6a5$1$f47f1b081edd3627ed24d67274dd6e15
>
> I used this long MD5
> (283c7c0d977648d4dc3def5a20e2a595701a754244baec7153d40e8ee30ff6a5$1$f4
> 7f1b081edd3627ed24d67274dd6e15) in my tomcat-user.xml and the user
> couldn't login with DIGEST method.
>
> Then I tried to execute the same command on Tomcat 6.0.43 and got:
>
> myusername:myrealm:mypassword:8fcc8ae2c169463bab76eb7124aede7b
> I used the short MD5 (8fcc8ae2c169463bab76eb7124aede7b) ) in my Tomcat
> 8's tomcat-user.xml and the login is working again! (DIGEST method)
>
> Question: Why Tomcat8's digest.bat is generating such a long MD5? It doesn't 
> look the same as earlier and it is not working.

The credential output format is different (salt$iterations$digest) and salt is 
enabled by default. If you try digest -s 0 -a MD5 foo:foo:foo you get
foo:foo:foo:$1$67ec44ba7c1234c8f201c261183e9d25

If you try digest -a MD5 foo:foo:foo on Tomcat 6 you get
foo:foo:foo:67ec44ba7c1234c8f201c261183e9d25

Tomcat 8 will accept either format although it always generates them in the new 
format.

Mark


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