{"id":19,"date":"2005-03-22T01:11:32","date_gmt":"2005-03-22T00:11:32","guid":{"rendered":"http:\/\/blog.blackdown.de\/2005\/03\/22\/cyrus_sasl-patch-for-exim-4\/"},"modified":"2016-10-29T03:51:03","modified_gmt":"2016-10-29T01:51:03","slug":"cyrus_sasl-patch-for-exim-4","status":"publish","type":"post","link":"https:\/\/blackdown.de\/articles\/cyrus_sasl-patch-for-exim-4\/","title":{"rendered":"cyrus_sasl patch for Exim 4"},"content":{"rendered":"<p>The <a href=\"http:\/\/www.exim.org\/\">Exim 4<\/a> source code supports authentication with <a href=\"http:\/\/asg.web.cmu.edu\/sasl\/\"><acronym title=\"Simple Authentication and Security Layer\">SASL<\/acronym><\/a> since version 4.43. <a href=\"http:\/\/www.debian.org\/\">Debian<\/a> started enabling this feature in exim4_4.50-2. After I&#8217;ve had upgraded to that version and replaced my <em>saslauthd<\/em> authenticators with brand-new <em>cyrus_sasl<\/em> authenticators, I&#8217;ve noticed that <code>auth.log<\/code> got flooded with entries like &#8216;<code>exim4: OTP unavailable because can't read\/write key database \/etc\/opiekeys: No such file or directory<\/code>.&#8217;<\/p>\n<p>My exim configuration uses three different <em>cyrus_sasl<\/em> authenticators and each exim invocation resulted in three of these <abbr title=\"One-Time-Password\">OTP<\/abbr> warnings because exim calls <code>sasl_listmech()<\/code> for each configured authenticator. It doesn&#8217;t specify a limiting <code>mech_list<\/code>, that means SASL will test which of all installed mechs actually can be used for authentication. Debian&#8217;s SASL package includes <code>libotp.so<\/code>, so it also tries to use OTP which is not configured on my system.<\/p>\n<p>There are two ways to get rid off the warnings:<\/p>\n<ul>\n<li>Remove <code>\/usr\/lib\/sasl2\/libotp.*<\/code>. You&#8217;ll have to do this after each upgrade of the libsasl2-modules package.<\/li>\n<li>Rebuild exim with this <a href=\"\/static\/exim\/71_cyrus_sasl.dpatch\">patch<\/a>. The patch specifies a limiting <code>mech_list<\/code> option for SASL.  This limits <code>sasl_listmech()<\/code> to the mechs used in the exim configuration. Other mechs won&#8217;t be tried anymore.<\/li>\n<\/ul>\n<p><em><strong>May 3rd, 2005:<\/strong> A slightly modified version of the patch has been integrated into Exim CVS and will be included in the next Debian release of exim4 (see Debian bug <a href=\"http:\/\/bugs.debian.org\/299743\">#299743<\/a>)<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The Exim 4 source code supports authentication with SASL since version 4.43. Debian started enabling this feature in exim4_4.50-2. After I&#8217;ve had upgraded to that version and replaced my saslauthd authenticators with brand-new cyrus_sasl authenticators, I&#8217;ve noticed that auth.log got flooded with entries like &#8216;exim4: OTP unavailable because can&#8217;t read\/write key database \/etc\/opiekeys: No such<br \/>[&rarr; <a href=\"https:\/\/blackdown.de\/articles\/cyrus_sasl-patch-for-exim-4\/\" class=\"more-link\">Read the rest of this entry<\/a>]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true},"categories":[6,3,7],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v18.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<meta name=\"description\" content=\"The Exim 4 source code supports authentication with SASL since version 4.43. 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