On 07/06/2011 11:40 AM, Adam Young wrote:
On 07/06/2011 11:13 AM, Adam Young wrote:


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Rebased. Also, updated the hbacrule_find.json sample data to show to the deny rules in static view


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Now has a page explaining why we are removing the deny rules, and a link to it that opens in a new window.
From def2e07cc270d0e5a752f25a0c6766ab7ce144e5 Mon Sep 17 00:00:00 2001
From: Adam Young <ayo...@redhat.com>
Date: Tue, 5 Jul 2011 17:59:05 -0400
Subject: [PATCH] HBAC deny warning

shows dialog if there are any HBAC deny rules.  Dialog provides option to navigate to the HBAC page.  Deny rules have their rule type value show up in red.

https://fedorahosted.org/freeipa/ticket/1421
---
 freeipa.spec.in                         |    7 +++
 install/html/Makefile.am                |    1 +
 install/html/hbac-deny-remove.html      |   82 +++++++++++++++++++++++++++++++
 install/ui/hbac.js                      |   48 ++++++++++++++++++-
 install/ui/ipa.css                      |    6 ++
 install/ui/ipa.js                       |    9 +++
 install/ui/test/bin/update_ipa_init.sh  |    2 +-
 install/ui/test/data/hbacrule_find.json |   58 +++++++++++++++-------
 install/ui/test/data/ipa_init.json      |   66 +++++++++++++++++++++---
 install/ui/webui.js                     |    4 ++
 install/ui/widget.js                    |    5 +-
 11 files changed, 256 insertions(+), 32 deletions(-)
 create mode 100644 install/html/hbac-deny-remove.html

diff --git a/freeipa.spec.in b/freeipa.spec.in
index 5ba38cb0272aa783702a34396da51a05779ef05f..276001ae65758c3915561defa57c9154a269a453 100644
--- a/freeipa.spec.in
+++ b/freeipa.spec.in
@@ -261,6 +261,8 @@ ln -s ../../../..%{_sysconfdir}/ipa/html/unauthorized.html \
     %{buildroot}%{_usr}/share/ipa/html/unauthorized.html
 ln -s ../../../..%{_sysconfdir}/ipa/html/browserconfig.html \
     %{buildroot}%{_usr}/share/ipa/html/browserconfig.html
+ln -s ../../../..%{_sysconfdir}/ipa/html/hbac-deny-remove.html \
+    %{buildroot}%{_usr}/share/ipa/html/hbac-deny-remove.html
 ln -s ../../../..%{_sysconfdir}/ipa/html/ipa_error.css \
     %{buildroot}%{_usr}/share/ipa/html/ipa_error.css
 
@@ -386,6 +388,7 @@ fi
 %{_usr}/share/ipa/html/ssbrowser.html
 %{_usr}/share/ipa/html/browserconfig.html
 %{_usr}/share/ipa/html/unauthorized.html
+%{_usr}/share/ipa/html/hbac-deny-remove.html
 %{_usr}/share/ipa/html/ipa_error.css
 %dir %{_usr}/share/ipa/migration
 %{_usr}/share/ipa/migration/error.html
@@ -412,6 +415,7 @@ fi
 %config(noreplace) %{_sysconfdir}/ipa/html/ipa_error.css
 %config(noreplace) %{_sysconfdir}/ipa/html/unauthorized.html
 %config(noreplace) %{_sysconfdir}/ipa/html/browserconfig.html
+%config(noreplace) %{_sysconfdir}/ipa/html/hbac-deny-remove.html
 %ghost %attr(0644,root,apache) %config(noreplace) %{_sysconfdir}/httpd/conf.d/ipa-rewrite.conf
 %ghost %attr(0644,root,apache) %config(noreplace) %{_sysconfdir}/httpd/conf.d/ipa.conf
 %{_usr}/share/ipa/ipa.conf
@@ -500,6 +504,9 @@ fi
 %ghost %attr(0644,root,apache) %config(noreplace) %{_sysconfdir}/ipa/default.conf
 
 %changelog
+* Wed Jul 6 2011 Adam Young <ayo...@redhat.com> - 2.0.90-5
+- Add HTML file describing issues with HBAC deny rules
+
 * Fri Jun 17 2011 Rob Crittenden <rcrit...@redhat.com> - 2.0.90-4
 - Ship ipa-ca-install utility
 
diff --git a/install/html/Makefile.am b/install/html/Makefile.am
index 46e8683c855bd093cf609b1fbc5e3df2d771e9de..c310be6d2351bd8268368f971e93d33ec1e6bf20 100644
--- a/install/html/Makefile.am
+++ b/install/html/Makefile.am
@@ -5,6 +5,7 @@ app_DATA =                              \
 	ssbrowser.html			\
 	browserconfig.html       	\
 	unauthorized.html       	\
+        hbac-deny-remove.html		\
 	ipa_error.css			\
 	$(NULL)
 
diff --git a/install/html/hbac-deny-remove.html b/install/html/hbac-deny-remove.html
new file mode 100644
index 0000000000000000000000000000000000000000..987819cd21629b2de8fe71c9d140dae9ef049bb2
--- /dev/null
+++ b/install/html/hbac-deny-remove.html
@@ -0,0 +1,82 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+    <title>IPA: Identity Policy Audit</title>
+
+    <script type="text/javascript" src="../ui/jquery.js"></script>
+
+    <link rel="stylesheet" type="text/css" href="../ui/jquery-ui.css" />
+    <link rel="stylesheet" type="text/css" href="ipa_error.css" />
+
+
+</head>
+
+<body id="header-bg">
+
+  <div class="container_1">
+    <div class="header-logo">
+            <img src="../ui/ipalogo.png" />
+        </div>
+       <div class="textblockkrb">
+        <h1>Removal of HBAC Deny Rules.</h1>
+        <p>FreeIPA has dropped support for DENY rules from the HBAC
+          specification. </p>
+        <p>The former design of HBAC specifies that<p>
+           <ol>
+             <li> If no ALLOW rules match, access is denied</li>
+             <li> If one or more ALLOW rules match and no DENY rules match,
+               access is  allowed</li>
+             <li>If one or more DENY rules match, access is denied</li>
+           </ol>
+        <p>Thus, DENY rules exist only to provide exceptions from the ALLOW
+          rules. There exists no ALLOW+DENY combination that cannot be
+          constructed from ALLOW rules only.[1]</P>
+
+        <p>DENY rules introduce a lot of edge-cases for evaluation. The most
+          important of which is the availability of the group membership for
+          the user logging in. Depending on the mechanism used to log in (for
+          example, GSSAPI over SSH or cross-realm Kerberos trust where the
+          user is provided by the PAC), SSSD's cache may not have a complete
+          list of groups for this user. If the login is occurring during
+          offline mode (where SSSD cannot contact the LDAP server to refresh
+          the user's groups), SSSD cannot determine whether DENY rules would
+          match for the user. This therefore translates into a potential
+          security issue.</p>
+
+        <p>We implemented a workaround in the SSSD evaluator to resolve this by
+          guaranteeing that we do a full lookup of all groups referenced by
+          rules while we are retrieving the rules from FreeIPA. However, this
+          requires at least one additional lookup against the LDAP server
+          (possibly many if there is need to resolve nestings). This results
+          in a significantly slower login while online.</p>
+
+        <p>We also have issues related to source host evaluation. Some
+          applications will provide an IP address instead of a hostname in the
+          pam_rhost attribute. Our only recourse here is to perform a
+          reverse-DNS lookup to try and identify the real hostname(s) of the
+          server. However, in many real-world environments, reverse DNS is
+          unavailable or misconfigured. In the case of ALLOW rules, this would
+          lead to a match failure and an implicit denial. However, a failure
+          to properly match a DENY rule can result in unexpected access being
+          granted. This is a potentially serious security issue.</p>
+
+        <p>Given these edge cases (and performance issues of the noted
+          workaround),  The FreeIPA team decided to drop DENY rules from the
+          HBAC specification and   limit HBAC only to ALLOW rules (which are
+          much safer). Beyond the obvious advantages for our implementation,
+          this should make it less complex for users to write their rules.</p>
+
+        <p>[1] Some rules are complex to simulate, such as "Allow access from
+          all PAM services EXCEPT telnet". But a safer and clearer
+          implementation approach does all access via whitelist. If a FreeIPA
+          implementation  is using an exception rule, the administrators
+          should re-evaluate the justification.
+        </p>
+        </div>
+
+   </div>
+
+</body>
+
+</html>
diff --git a/install/ui/hbac.js b/install/ui/hbac.js
index c082056bb5005d6698eea1015fa50586ad9c415d..5e6a59c92633b87d68e7550f46715993162f00ec 100644
--- a/install/ui/hbac.js
+++ b/install/ui/hbac.js
@@ -26,7 +26,21 @@ IPA.entity_factories.hbacrule = function () {
     return IPA.entity_builder().
         entity('hbacrule').
         search_facet({
-            columns:['cn','usercategory','hostcategory','ipaenabledflag',
+            columns:['cn',
+                     {
+                         factory: IPA.column,
+                         name:'accessruletype',
+                         setup : function(container,record){
+                             container.empty();
+                             var value = record[this.name];
+                             value = value ? value.toString() : '';
+                             if (value === 'deny'){
+                                 container.addClass('hbac-deny-rule');
+                             }
+                             container.append(value);
+                         }
+                     },
+                     'usercategory','hostcategory','ipaenabledflag',
                      'servicecategory','sourcehostcategory']
         }).
         details_facet({
@@ -996,3 +1010,35 @@ IPA.hbacrule_accesstime_widget = function (spec) {
 
     return that;
 };
+
+IPA.hbac_deny_warning_dialog = function (container) {
+    var dialog = IPA.dialog({
+        'title': 'HBAC Deny Rules found'
+    });
+
+    dialog.create = function() {
+        dialog.container.append(
+            "HBAC rules with type deny have been found."+
+                "  These rules have been deprecated." +
+                "  Please remove them, and restructure the HBAC rules." );
+        $('<p/>').append($('<a/>',{
+            text: 'Click here for more information',
+            href: '../html/hbac-deny-remove.html',
+            target: "_blank",
+            style: 'target: tab; color: blue; '
+        })).appendTo(dialog.container);
+    };
+
+    dialog.add_button('Edit HBAC Rules', function() {
+        dialog.close();
+        IPA.nav.show_page('hbacrule', 'search');
+    });
+
+    dialog.add_button('Ignore for now', function() {
+        dialog.close();
+    });
+
+    dialog.init();
+
+    dialog.open();
+};
diff --git a/install/ui/ipa.css b/install/ui/ipa.css
index 38b5a9118c63c8e1909e91a3e669a233c5ea1cb4..599441b2216f2a00b23856cb83ef29d4ae8cf087 100644
--- a/install/ui/ipa.css
+++ b/install/ui/ipa.css
@@ -645,6 +645,12 @@ div.tabs {
     padding-left: 0.5em;
 }
 
+.hbac-deny-rule {
+    padding-left: 0.5em;
+    color: red;
+}
+
+
 .search-table tfoot td {
     padding: 0.5em 0 0 1em;
     border-top: 1px solid #dfdfdf;
diff --git a/install/ui/ipa.js b/install/ui/ipa.js
index 4f194739b817f80779ff49af5a5092339ddca80f..4b505235bcc8467d50e9143a0842982a5ed81628 100644
--- a/install/ui/ipa.js
+++ b/install/ui/ipa.js
@@ -123,6 +123,15 @@ var IPA = ( function () {
             }
         }));
 
+        batch.add_command(IPA.command({
+            entity: 'hbacrule',
+            method: 'find',
+            options:{"accessruletype":"deny"},
+            on_success: function(data, text_status, xhr) {
+                that.hbac_deny_rules = data;
+            }
+        }));
+
         batch.execute();
     };
 
diff --git a/install/ui/test/bin/update_ipa_init.sh b/install/ui/test/bin/update_ipa_init.sh
index 5cdeacaa42137572c96f4fe9dd5a7a3b3a120153..23852a2693ac72fb29a6bf468e05caedb7851065 100755
--- a/install/ui/test/bin/update_ipa_init.sh
+++ b/install/ui/test/bin/update_ipa_init.sh
@@ -17,4 +17,4 @@ fi
 
 
 
-curl -v -H "Content-Type:application/json" -H "Accept:applicaton/json" --negotiate -u :  --cacert /etc/ipa/ca.crt  -d '{"method":"batch","params":[[ {"method":"json_metadata","params":[[],{}]}, {"method":"i18n_messages","params":[[],{}]}, {"method":"user_find","params":[[],{"whoami":"true","all":"true"}]}, {"method":"env","params":[[],{}]}, {"method":"dns_is_enabled","params":[[],{}]} ],{}],"id":1}'  -X POST  https://`hostname`/ipa/json  | sed 's/[ \t]*$//' >   $INIT_FILE
+curl -v -H "Content-Type:application/json" -H "Accept:applicaton/json" --negotiate -u :  --cacert /etc/ipa/ca.crt  -d '{"method":"batch","params":[[{"method":"json_metadata","params":[[],{}]},{"method":"i18n_messages","params":[[],{}]},{"method":"user_find","params":[[],{"whoami":true,"all":true}]},{"method":"env","params":[[],{}]},{"method":"dns_is_enabled","params":[[],{}]},{"method":"hbacrule_find","params":[[],{"accessruletype":"deny"}]}],{}]}'  -X POST  https://`hostname`/ipa/json  | sed 's/[ \t]*$//' >   $INIT_FILE
diff --git a/install/ui/test/data/hbacrule_find.json b/install/ui/test/data/hbacrule_find.json
index fd95d9f572877fb0f7d82002f58b7db2076dc9c2..3801a7d448c4990f7218a32ccc817479b91898d7 100644
--- a/install/ui/test/data/hbacrule_find.json
+++ b/install/ui/test/data/hbacrule_find.json
@@ -1,54 +1,74 @@
 {
-    "error": null, 
-    "id": 0,
+    "error": null,
+    "id": null,
     "result": {
-        "count": 2,
+        "count": 4,
         "result": [
             {
                 "accessruletype": [
                     "allow"
-                ], 
+                ],
                 "cn": [
                     "allow_all"
-                ], 
+                ],
                 "description": [
                     "Allow all users to access any host from any host"
-                ], 
-                "dn": "ipauniqueid=b7567b5a-e39311df-bfde9b13-2b28c216,cn=hbac,dc=dev,dc=example,dc=com",
+                ],
+                "dn": "ipauniqueid=ca842a42-a445-11e0-87ff-525400b55a47,cn=hbac,dc=server15,dc=ayoung,dc=boston,dc=devel,dc=redhat,dc=com",
                 "hostcategory": [
                     "all"
-                ], 
+                ],
                 "ipaenabledflag": [
                     "TRUE"
-                ], 
+                ],
                 "servicecategory": [
                     "all"
-                ], 
+                ],
                 "sourcehostcategory": [
                     "all"
-                ], 
+                ],
                 "usercategory": [
                     "all"
                 ]
             },
             {
                 "accessruletype": [
-                    "allow"
+                    "deny"
                 ],
-                "accesstime": [
-                    "periodic daily 0800-1400",
-                    "absolute 201012161032 ~ 201012161033"
+                "cn": [
+                    "deny1"
+                ],
+                "dn": "ipauniqueid=8af3e23c-a7e2-11e0-b394-525400b55a47,cn=hbac,dc=server15,dc=ayoung,dc=boston,dc=devel,dc=redhat,dc=com",
+                "ipaenabledflag": [
+                    "TRUE"
+                ]
+            },
+            {
+                "accessruletype": [
+                    "deny"
+                ],
+                "cn": [
+                    "deny2"
+                ],
+                "dn": "ipauniqueid=8f05d042-a7e2-11e0-b394-525400b55a47,cn=hbac,dc=server15,dc=ayoung,dc=boston,dc=devel,dc=redhat,dc=com",
+                "ipaenabledflag": [
+                    "TRUE"
+                ]
+            },
+            {
+                "accessruletype": [
+                    "deny"
                 ],
                 "cn": [
-                    "test"
+                    "deny3"
                 ],
-                "dn": "ipauniqueid=3b6d2a82-e3b511df-bfde9b13-2b28c216,cn=hbac,dc=dev,dc=example,dc=com",
+                "dn": "ipauniqueid=92dcf9fc-a7e2-11e0-8dac-525400b55a47,cn=hbac,dc=server15,dc=ayoung,dc=boston,dc=devel,dc=redhat,dc=com",
                 "ipaenabledflag": [
                     "TRUE"
                 ]
             }
-        ], 
-        "summary": null, 
+        ],
+        "summary": "4 HBAC rules matched",
         "truncated": false
     }
 }
diff --git a/install/ui/test/data/ipa_init.json b/install/ui/test/data/ipa_init.json
index 5b4dadfca42a43acad4d857fe4bb9bbba771512d..a67002105bb52e061b8a83483436118e1cbc1f9d 100644
--- a/install/ui/test/data/ipa_init.json
+++ b/install/ui/test/data/ipa_init.json
@@ -1,8 +1,8 @@
 {
     "error": null,
-    "id": 1,
+    "id": null,
     "result": {
-        "count": 5,
+        "count": 6,
         "results": [
             {
                 "error": null,
@@ -8266,7 +8266,8 @@
                             "ipausersearchfields",
                             "ipagroupsearchfields",
                             "ipamigrationenabled",
-                            "ipacertificatesubjectbase"
+                            "ipacertificatesubjectbase",
+                            "ipapwdexpadvnotify"
                         ],
                         "hidden_attributes": [
                             "objectclass",
@@ -12117,7 +12118,7 @@
                         "aciattrs": [],
                         "attribute_members": {},
                         "bindable": false,
-                        "container_dn": "cn=IDM.LAB.BOS.REDHAT.COM,cn=kerberos",
+                        "container_dn": "cn=SERVER15.AYOUNG.BOSTON.DEVEL.REDHAT.COM,cn=kerberos",
                         "default_attributes": [
                             "krbmaxticketlife",
                             "krbmaxrenewableage"
@@ -12962,7 +12963,7 @@
                         ],
                         "attribute_members": {},
                         "bindable": false,
-                        "container_dn": "cn=IDM.LAB.BOS.REDHAT.COM,cn=kerberos",
+                        "container_dn": "cn=SERVER15.AYOUNG.BOSTON.DEVEL.REDHAT.COM,cn=kerberos",
                         "default_attributes": [
                             "cn",
                             "cospriority",
@@ -15887,17 +15888,17 @@
                         ],
                         "krbextradata": [
                             {
-                                "__base64__": "AAL2bA5Ocm9vdC9hZG1pbkBTRVJWRVIxNS5BWU9VTkcuQk9TVE9OLkRFVkVMLlJFREhBVC5DT00A"
-                            },
-                            {
                                 "__base64__": "AAgBAA=="
+                            },
+                            {
+                                "__base64__": "AAL2bA5Ocm9vdC9hZG1pbkBTRVJWRVIxNS5BWU9VTkcuQk9TVE9OLkRFVkVMLlJFREhBVC5DT00A"
                             }
                         ],
                         "krblastpwdchange": [
                             "20110702005726Z"
                         ],
                         "krblastsuccessfulauth": [
-                            "20110705172822Z"
+                            "20110705180548Z"
                         ],
                         "krbpasswordexpiration": [
                             "20110930005726Z"
@@ -16017,6 +16018,53 @@
                 "result": true,
                 "summary": null,
                 "value": ""
+            },
+            {
+                "count": 3,
+                "error": null,
+                "result": [
+                    {
+                        "accessruletype": [
+                            "deny"
+                        ],
+                        "cn": [
+                            "deny1"
+                        ],
+                        "dn": "ipauniqueid=8af3e23c-a7e2-11e0-b394-525400b55a47,cn=hbac,dc=server15,dc=ayoung,dc=boston,dc=devel,dc=redhat,dc=com",
+                        "ipaenabledflag": [
+                            "TRUE"
+                        ],
+                        "memberuser_user": [
+                            "abrown"
+                        ]
+                    },
+                    {
+                        "accessruletype": [
+                            "deny"
+                        ],
+                        "cn": [
+                            "deny2"
+                        ],
+                        "dn": "ipauniqueid=8f05d042-a7e2-11e0-b394-525400b55a47,cn=hbac,dc=server15,dc=ayoung,dc=boston,dc=devel,dc=redhat,dc=com",
+                        "ipaenabledflag": [
+                            "TRUE"
+                        ]
+                    },
+                    {
+                        "accessruletype": [
+                            "deny"
+                        ],
+                        "cn": [
+                            "deny3"
+                        ],
+                        "dn": "ipauniqueid=92dcf9fc-a7e2-11e0-8dac-525400b55a47,cn=hbac,dc=server15,dc=ayoung,dc=boston,dc=devel,dc=redhat,dc=com",
+                        "ipaenabledflag": [
+                            "TRUE"
+                        ]
+                    }
+                ],
+                "summary": "3 HBAC rules matched",
+                "truncated": false
             }
         ]
     }
diff --git a/install/ui/webui.js b/install/ui/webui.js
index 2c4451489fd4a3acb00621ab57824e051952cf0f..11f4b8bb167d189a70aa21580aa437e6eecd3a5c 100644
--- a/install/ui/webui.js
+++ b/install/ui/webui.js
@@ -158,6 +158,10 @@ $(function() {
         IPA.nav.update();
 
         $('#login_header').html(IPA.messages.login.header);
+
+        if (IPA.hbac_deny_rules  && IPA.hbac_deny_rules.count > 0){
+            IPA.hbac_deny_warning_dialog();
+        }
     }
 
 
diff --git a/install/ui/widget.js b/install/ui/widget.js
index cd3a5c60e2153b25c0fce58ebaf94cf3f51f1ffe..9142a26a90927ecaa845c25b80f94f6938209f12 100644
--- a/install/ui/widget.js
+++ b/install/ui/widget.js
@@ -1156,7 +1156,7 @@ IPA.column = function (spec) {
         }
     };
 
-    that.setup = function(container, record) {
+    function setup(container, record) {
         container.empty();
 
         var value = record[that.name];
@@ -1177,8 +1177,9 @@ IPA.column = function (spec) {
         } else {
             container.append(value);
         }
+    }
 
-    };
+    that.setup = spec.setup || setup;
 
     that.link_handler = function(value) {
         return false;
-- 
1.7.5.2

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