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From "Alan D. Cabrera" <>
Subject Re: SMTP Authentication
Date Thu, 15 Dec 2005 23:00:06 GMT
Hash: SHA1

Cryptix seems to have an impl.  I haven't looked at it.


Rick McGuire wrote, On 12/7/2005 9:45 AM:
> Sasl is the challenge/response algorithm for simple server
> authentication (Simple Authentication and Security Layer).  The SMTP
> spec on authentication defines everything in terms of SASL operations
> (  Even PLAIN and
> LOGIN are SASL operations.  The Java SASL API added in 5.0 provides a
> nice extendable framework for SASL operations with support for a lot
> more than the simple operations. 
> Using the SASL APIs is very nice, as would allow Geronimo to support
> almost anything a server would throw at as for free, as long it was a
> mechanism supported by the security provider implementation.
> Anyway, I've got code for LOGIN and PLAIN already written, and am almost
> done with a CRAM-MD5 version.  This sounds like it will be sufficient
> for the short term.
> Rick
> Dain Sundstrom wrote:
>> From my experience, most servers and clients are just using LOGIN  and
>> PLAIN with TLS sometimes.  I'm not very familiar with Sasl; can  you
>> explain how it fits into a mail client or server?
>> Thanks,
>> -dain
>> On Dec 7, 2005, at 8:37 AM, Rick McGuire wrote:
>>> I've looking at the issues of doing SMTP authentication, and after 
>>> reading the SMTP spec, starting coding up a solution using the Java 
>>> Sasl API, which was doing most of the heavy lifting for me.  This 
>>> morning, however, I finally noticed the critical words in the Sasl 
>>> Javadoc...."since Java 1.5".  Since we're not in a position to 
>>> support Java 1.5 yet, that definitely tossed a speed bump in my path.
>>> LOGIN and PLAIN authentication are pretty simple to do without  Sasl,
>>> and I believe I can also figure out how to do CRAM_MD5.   Other forms
>>> of authentication are probably a bit beyond my current  experience
>>> with crypto/security.  How sophisticated do we need to  be with
>>> this?  Are LOGIN and PLAIN sufficient (combined with TLS  support)? 
>>> Note that this question also applies to the POP3 and  IMAP
>>> implementations, since they also use Sasl authentication  mechanisms.
>>> Rick

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