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If I am trying to build OpenSSH 6.6 with Kerberos GSSAPI support, do I still need to get Simon Wilkinson's patches? --- Scott Neugroschl | XYPRO Technology Corporation 4100 Guardian Street | Suite 100 |Simi Valley, CA 93063 | Phone 805 583-2874|Fax 805 583-0124 |

I'm trying to troubleshoot gssapi_with_mic authentication with OpenSSH 5.2p1 on FreeBSD 8.0. If I run sshd with maximum debug "sshd -ddd" the most detail I get is: GSSAPI MIC check failed That comes from line 282 in auth2-gss.c 279 if (!GSS_ERROR(PRIVSEP(ssh_gssapi_checkmic(gssctxt, &gssbuf, &mic)))) 280 authenticated = PRIVSEP(ssh_gssapi_userok(authctxt->user)); 281 else 282 logit("GSSAPI MIC check failed"); 283 I think that's as much help as I can get from...

...else { + oid.elements = doid + 2; + oid.length = len - 2; + } + gss_test_oid_set_member(&ms, &oid, supported, &present); + } while (mechs > 0 && !present); + + gss_release_oid_set(&ms, &supported); + + if (!present) { + xfree(doid); + return (0); + } + + if (GSS_ERROR(PRIVSEP(ssh_gssapi_server_ctx(&ctxt, &oid)))) + return (0); + + authctxt->methoddata=(void *)ctxt; + + packet_start(SSH2_MSG_USERAUTH_GSSAPI_RESPONSE); + + /* Return OID in same format as we received it*/ + packet_put_string(doid, len); + + packet_send(); + xfree(doid); + + dispatch_set...

As far as I know this patch has no security implications -- I don't believe that allowing sshd to use get_local_name() (in canohost.c) on a connected socket to determine it's own fqdn will allow a malicious client (or router or dns server) to make it come to the wrong conclusion. But please let me know if you think I'm wrong. Please also let me know if you're just not interested

I cooked this up while trying to figure out why thunderbird on Windows w/ SSPI was not working, but it turned out thunderbird does not use it, so I haven't been able to test it yet. I'm presenting it for discussion only, unless someone else can try it :) Modern versions of MIT kerberos support GSS-SPNEGO natively, but are only willing to negotiate for kerberos tickets and not NTLM

...) + log("Authorized to %s, krb5 principal %s (.k5login)", name, gssapi_client_name.value); + krb5_free_principal(krb_context, princ); - return retval; + return retval | retval2; } /* Make sure that this is called _after_ we've setuid to the user */ @@ -524,8 +545,8 @@ if (GSS_ERROR(maj_status)) { /* Failure <sniff> */ - auth_log(authctxt, 0, "gssapi", " ssh2"); authctxt->postponed = 0; + auth_log(authctxt, 0, "gssapi", " ssh2"); dispatch_set(SSH2_MSG_USERAUTH_GSSAPI_TOKEN, NULL); userauth_reply(authctxt, 0); } @...