[nos-bbs] MD5 Authentication Response

[Boudewijn (Bob) Tenty]

A MD5 hash is easy to generate with MD5SUM in linux. A etelnet capable jnos transmits a hex number in the password prompt according to the manual.
I should monitor and log the etelnet session with wireshark to see exactly what is going on.

Bob VE3TOK

On 2018-04-15 03:30 PM, Michael Fox - N6MEF wrote:
>
> All,
>
>  
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> I’m trying to figure out how a generic (non-JNOS) client would respond to the “Password […] :” prompt issued by JNOS when MD5AUTHENTICATION is #define’d.
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>  
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> The response from a JNOS client appears to be created in lines 358-361 of telnet.c.  But I’m not knowledgeable enough about C to understand what it’s doing.
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>  
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> For example, suppose I was on a Linux or Windows machine (not running JNOS) and I telnetted to a JNOS machine that has MD5 AUTHENTICATION defined.  I enter my login at the login prompt.  Then I get the “Password […] “ prompt.  Given the challenge in the password prompt and given that I know my password, how would I calculate (i.e. what commands would I run to generate) the appropriate MD5 response to the prompt?
>
>  
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> Thanks,
>
> Michael - N6MEF
>
>
>
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