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<p>Not so good if it gets truncated.</p>
<p>Bob<br>
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<div class="moz-cite-prefix">On 2018-04-16 03:32 PM, Michael Fox -
N6MEF wrote:<br>
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<p class="MsoNormal"><span style="color:#1F497D">Yes, but the
question is, what goes into the hash? And, looking at the C
code, it looks like the length might be truncated, but how
long?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Michael N6MEF<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="color:windowtext">From:</span></b><span
style="color:windowtext"> Boudewijn (Bob) Tenty
<a class="moz-txt-link-rfc2396E" href="mailto:bobtenty@gmail.com"><bobtenty@gmail.com></a> <br>
<b>Sent:</b> Monday, April 16, 2018 12:26 PM<br>
<b>To:</b> Michael Fox - N6MEF <a class="moz-txt-link-rfc2396E" href="mailto:n6mef@mefox.org"><n6mef@mefox.org></a><br>
<b>Subject:</b> Re: [nos-bbs] MD5 Authentication
Response<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">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.<br>
I should monitor and log the etelnet session with wireshark
to see exactly what is going on.<br>
<br>
Bob VE3TOK<o:p></o:p></p>
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<p class="MsoNormal">On 2018-04-15 03:30 PM, Michael Fox -
N6MEF wrote:<o:p></o:p></p>
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<p class="MsoNormal">All,<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">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.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">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.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">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?<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal">Michael - N6MEF<o:p></o:p></p>
<p class="MsoNormal"><br>
<br>
<br>
<o:p></o:p></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>nos-bbs mailing list<o:p></o:p></pre>
<pre><a href="mailto:nos-bbs@tapr.org" moz-do-not-send="true">nos-bbs@tapr.org</a><o:p></o:p></pre>
<pre><a href="http://www.tapr.org/mailman/listinfo/nos-bbs" moz-do-not-send="true">http://www.tapr.org/mailman/listinfo/nos-bbs</a><o:p></o:p></pre>
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<p class="MsoNormal"><o:p> </o:p></p>
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<pre wrap="">_______________________________________________
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