IIS Client certificate not working. Returns 403 error -


i'm trying setup iis 8 (windows server 2012) accept client certificates secured webapi endpoint. following this post created self signed certificate , client certificate:

makecert.exe -r -n "cn=mycompany" -pe -sv mycompany.pvk -a sha1 -len 2048 -cy authority mycompany.cer  makecert.exe -iv mycompany.pvk -ic mycompany.cer -n "cn=my client" -pe -sv myclient.pvk -a sha1 -len 2048 -sky exchange myclient.cer -eku 1.3.6.1.5.5.7.3.2  pvk2pfx.exe -pvk myclient.pvk -spc myclient.cer -pfx myclient.pfx -po the_password

i installed root certificate mycompany.cer on iis server, on iis manager/ssl settings selected "accept" radio button allow website accept client certificates.

on client side have c# test console app loads client cert myclient.pfx file , calls webapi endpoint:

var certhandler = new webrequesthandler(); certhandler.clientcertificateoptions = clientcertificateoption.manual; certhandler.useproxy = false; var certificate = new x509certificate2(file.readallbytes(@"c:\myclient.pfx"), "the_password"); certhandler.clientcertificates.add(certificate); var client = new httpclient(certhandler); var result = client.getasync("https://myserver/api/myendpoint").result; string resultstr = result.content.readasstringasync().result; console.writeline(resultstr);

i'm getting 403 error:

403 - forbidden: access denied. not have permission view directory or page using credentials supplied.

i tried same setup on local iis (windows 7): imported mycompany.cer file, setup ssl in iis. time works fine , webapi endpoint can see client certificate no problem.

any ideas?

-- update 1

i enabled failed request tracing on iis , this:

<failedrequest url="https://myserver:443/"            siteid="35"            apppoolid="certtest"            processid="7248"            verb="get"            authenticationtype="not_available"               activityid="{00000000-0000-0000-b0aa-0280000000e0}"            failurereason="status_code"            statuscode="403.16"            triggerstatuscode="403.16"            timetaken="0"            xmlns:freb="http://schemas.microsoft.com/win/2006/06/iis/freb"            >

if understand right error 403.16. understand happens when certificate on server not imported trusted root certification authorities under local computer. double checked , that's not case.

check that

  • on iis machine have installed server's cert issuer certificate trusted root certification authorities under local computer
  • on iis machine have installed client's cert issuer certificate trusted root certification authorities under local computer
  • on client machine have installed server's cert issuer certificate trusted root certification authorities under windows user runs console app
  • on client machine have installed client's cert issuer certificate trusted root certification authorities under windows user runs console app. or can make sure include necessary certificate's chain pfx file
  • in code use x509certificate2's ctor version x509keystorageflags.userkeyset explicitly.

if won't help,

  1. try open url in ie (under same windows user account runs console app).
  2. open *.cer files double click on client machine under windows user account runs console app , see windows says validity.
  3. change iis ssl settings ignore client certificate see if it's server certificate. try both browser , console app.

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