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comparison mod_incidents_handling/incidents_handling/incidents_handling.lib.lua @ 913:f42837829d5f

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mod_incidents_handling: commiting its auxiliary library.
author Marco Cirillo <maranda@lightwitch.org>
date Sun, 17 Feb 2013 19:29:39 +0100
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children 7dbde05b48a9
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912:d814cc183c40 913:f42837829d5f
1 -- This contains the auxiliary functions for the Incidents Handling module.
2 -- (C) 2012-2013, Marco Cirillo (LW.Org)
3
4 local pairs, ipairs, os_date, string, table, tonumber = pairs, ipairs, os.date, string, table, tonumber
5
6 local dataforms_new = require "util.dataforms".new
7 local st = require "util.stanza"
8
9 local xmlns_inc = "urn:xmpp:incident:2"
10 local xmlns_iodef = "urn:ietf:params:xml:ns:iodef-1.0"
11 local my_host = nil
12
13 -- // Util and Functions //
14
15 local function ft_str()
16 local d = os_date("%FT%T%z"):gsub("^(.*)(%+%d+)", function(dt, z)
17 if z == "+0000" then return dt.."Z" else return dt..z end
18 end)
19 return d
20 end
21
22 local function get_incident_layout(i_type)
23 local layout = {
24 title = (i_type == "report" and "Incident report form") or (i_type == "request" and "Request for assistance with incident form"),
25 instructions = "Started/Ended Time, Contacts, Sources and Targets of the attack are mandatory. See RFC 5070 for further format instructions.",
26 { name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/commands" },
27
28 { name = "name", type = "hidden", value = my_host },
29 { name = "entity", type ="text-single", label = "Remote entity to query" },
30 { name = "started", type = "text-single", label = "Incident Start Time" },
31 { name = "ended", type = "text-single", label = "Incident Ended Time" },
32 { name = "reported", type = "hidden", value = ft_str() },
33 { name = "description", type = "text-single", label = "Description",
34 desc = "Description syntax is: <lang (in xml:lang format)> <short description>" },
35 { name = "contacts", type = "text-multi", label = "Contacts",
36 desc = "Contacts entries format is: <address> <type> <role> - separated by new lines" },
37 { name = "related", type = "text-multi", label = "Related Incidents",
38 desc = "Related incidents entries format is: <CSIRT's FQDN> <Incident ID> - separated by new lines" },
39 { name = "impact", type = "text-single", label = "Impact Assessment",
40 desc = "Impact assessment format is: <severity> <completion> <type>" },
41 { name = "sources", type = "text-multi", label = "Attack Sources",
42 desc = "Attack sources format is: <address> <category> <count> <count-type>" },
43 { name = "targets", type = "text-multi", label = "Attack Targets",
44 desc = "Attack target format is: <address> <category> <noderole>" }
45 }
46
47 if i_type == "request" then
48 table.insert(layout, {
49 name = "expectation",
50 type = "list-single",
51 label = "Expected action from remote entity",
52 value = {
53 { value = "nothing", label = "No action" },
54 { value = "contact-sender", label = "Contact us, regarding the incident" },
55 { value = "investigate", label = "Investigate the entities listed into the incident" },
56 { value = "block-host", label = "Block the involved accounts" },
57 { value = "other", label = "Other action, filling the description field is required" }
58 }})
59 table.insert(layout, { name = "description", type = "text-single", label = "Description" })
60 end
61
62 return dataforms_new(layout)
63 end
64
65 local function render_list(incidents)
66 local layout = {
67 title = "Stored Incidents List",
68 instructions = "You can select and view incident reports here, if a followup/response is possible it'll be noted in the step after selection.",
69 { name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/commands" },
70 {
71 name = "ids",
72 type = "list-single",
73 label = "Stored Incidents",
74 value = {}
75 }
76 }
77
78 -- Render stored incidents list
79
80 for id in pairs(incidents) do
81 table.insert(layout[2].value, { value = id, label = id })
82 end
83
84 return dataforms_new(layout)
85 end
86
87 local function insert_fixed(t, item) table.insert(t, { type = "fixed", value = item }) end
88
89 local function render_single(incident)
90 local layout = {
91 title = string.format("Incident ID: %s - Friendly Name: %s", incident.data.id.text, incident.data.id.name),
92 instructions = incident.data.desc.text,
93 { name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/commands" }
94 }
95
96 insert_fixed(layout, "Start Time: "..incident.data.start_time)
97 insert_fixed(layout, "End Time: "..incident.data.end_time)
98 insert_fixed(layout, "Report Time: "..incident.data.report_time)
99
100 insert_fixed(layout, "Contacts --")
101 for _, contact in ipairs(incident.data.contacts) do
102 insert_fixed(layout, string.format("Role: %s Type: %s", contact.role, contact.type))
103 if contact.jid then insert_fixed(layout, "--> JID: "..contact.jid..(contact.xmlns and ", XMLNS: "..contact.xmlns or "")) end
104 if contact.email then insert_fixed(layout, "--> E-Mail: "..contact.email) end
105 if contact.telephone then insert_fixed(layout, "--> Telephone: "..contact.telephone) end
106 if contact.postaladdr then insert_fixed(layout, "--> Postal Address: "..contact.postaladdr) end
107 end
108
109 insert_fixed(layout, "Related Activity --")
110 for _, related in ipairs(incident.data.related) do
111 insert_fixed(layout, string.format("Name: %s ID: %s", related.name, related.text))
112 end
113
114 insert_fixed(layout, "Assessment --")
115 insert_fixed(layout, string.format("Language: %s Severity: %s Completion: %s Type: %s",
116 incident.data.assessment.lang, incident.data.assessment.severity, incident.data.assessment.completion, incident.data.assessment.type))
117
118 insert_fixed(layout, "Sources --")
119 for _, source in ipairs(incident.data.event_data.sources) do
120 insert_fixed(layout, string.format("Address: %s Counter: %s", source.address.text, source.counter.value))
121 end
122
123 insert_fixed(layout, "Targets --")
124 for _, target in ipairs(incident.data.event_data.targets) do
125 insert_fixed(layout, string.format("For NodeRole: %s", (target.noderole.cat == "ext-category" and target.noderole.ext) or targets.noderole.cat))
126 for _, address in ipairs(target.addresses) do
127 insert_fixed(layout, string.format("---> Address: %s Type: %s", address.text, (address.cat == "ext-category" and address.ext) or address.cat))
128 end
129 end
130
131 if incident.data.expectation then
132 insert_fixed(layout, "Expected Action: "..incident.data.expectation.action)
133 if incident.data.expectation.desc then
134 insert_fixed(layout, "Expected Action Description: "..incident.data.expectation.desc)
135 end
136 end
137
138 if incident.type == "request" and incident.status == "open" then
139 table.insert(layout, { name = "response-datetime", type = "hidden", value = ft_str() })
140 table.insert(layout, { name = "response", type = "text-single", label = "Respond to the request" })
141 end
142
143 return dataforms_new(layout)
144 end
145
146 local function get_type(var, typ)
147 if typ == "counter" then
148 local count_type, count_ext = var, nil
149 if count_type ~= "byte" or count_type ~= "packet" or count_type ~= "flow" or count_type ~= "session" or
150 count_type ~= "alert" or count_type ~= "message" or count_type ~= "event" or count_type ~= "host" or
151 count_type ~= "site" or count_type ~= "organization" then
152 count_ext = count_type
153 count_type = "ext-type"
154 end
155 return count_type, count_ext
156 elseif typ == "category" then
157 local cat, cat_ext = var, nil
158 if cat ~= "asn" or cat ~= "atm" or cat ~= "e-mail" or cat ~= "ipv4-addr" or
159 cat ~= "ipv4-net" or cat ~= "ipv4-net-mask" or cat ~= "ipv6-addr" or cat ~= "ipv6-net" or
160 cat ~= "ipv6-net-mask" or cat ~= "mac" then
161 cat_ext = cat
162 cat = "ext-category"
163 end
164 return cat, cat_ext
165 elseif type == "noderole" then
166 local noderole_ext = nil
167 if cat ~= "client" or cat ~= "server-internal" or cat ~= "server-public" or cat ~= "www" or
168 cat ~= "mail" or cat ~= "messaging" or cat ~= "streaming" or cat ~= "voice" or
169 cat ~= "file" or cat ~= "ftp" or cat ~= "p2p" or cat ~= "name" or
170 cat ~= "directory" or cat ~= "credential" or cat ~= "print" or cat ~= "application" or
171 cat ~= "database" or cat ~= "infra" or cat ~= "log" then
172 noderole_ext = true
173 end
174 return noderole_ext
175 end
176 end
177
178 local function do_tag_mapping(tag, object)
179 if tag.name == "IncidentID" then
180 object.id = { text = tag:get_text(), name = tag.attr.name }
181 elseif tag.name == "StartTime" then
182 object.start_time = tag:get_text()
183 elseif tag.name == "EndTime" then
184 object.end_time = tag:get_text()
185 elseif tag.name == "ReportTime" then
186 object.report_time = tag:get_text()
187 elseif tag.name == "Description" then
188 object.desc = { text = tag:get_text(), lang = tag.attr["xml:lang"] }
189 elseif tag.name == "Contact" then
190 local jid = tag:get_child("AdditionalData").tags[1]
191 local email = tag:get_child("Email")
192 local telephone = tag:get_child("Telephone")
193 local postaladdr = tag:get_child("PostalAddress")
194 if not object.contacts then
195 object.contacts = {}
196 object.contacts[1] = {
197 role = tag.attr.role,
198 ext_role = (tag.attr["ext-role"] and true) or nil,
199 type = tag.attr.type,
200 ext_type = (tag.attr["ext-type"] and true) or nil,
201 xmlns = jid.attr.xmlns,
202 jid = jid:get_text(),
203 email = email,
204 telephone = telephone,
205 postaladdr = postaladdr
206 }
207 else
208 object.contacts[#object.contacts + 1] = {
209 role = tag.attr.role,
210 ext_role = (tag.attr["ext-role"] and true) or nil,
211 type = tag.attr.type,
212 ext_type = (tag.attr["ext-type"] and true) or nil,
213 xmlns = jid.attr.xmlns,
214 jid = jid:get_text(),
215 email = email,
216 telephone = telephone,
217 postaladdr = postaladdr
218 }
219 end
220 elseif tag.name == "RelatedActivity" then
221 object.related = {}
222 for _, t in ipairs(tag.tags) do
223 if tag.name == "IncidentID" then
224 object.related[#object.related + 1] = { text = t:get_text(), name = tag.attr.name }
225 end
226 end
227 elseif tag.name == "Assessment" then
228 local impact = tag:get_child("Impact")
229 object.assessment = { lang = impact.attr.lang, severity = impact.attr.severity, completion = impact.attr.completion, type = impact.attr.type }
230 elseif tag.name == "EventData" then
231 local source = tag:get_child("Flow").tags[1]
232 local target = tag:get_child("Flow").tags[2]
233 local expectation = tag:get_child("Flow").tags[3]
234 object.event_data = { sources = {}, targets = {} }
235 for _, t in ipairs(source.tags) do
236 local addr = t:get_child("Address")
237 local cntr = t:get_child("Counter")
238 object.event_data.sources[#object.event_data.sources + 1] = {
239 address = { cat = addr.attr.category, ext = addr.attr["ext-category"], text = addr:get_text() },
240 counter = { type = cntr.attr.type, ext_type = cntr.attr["ext-type"], value = cntr:get_text() }
241 }
242 end
243 for _, entry in ipairs(target.tags) do
244 local noderole = { cat = entry:get_child("NodeRole").attr.category, ext = entry:get_child("NodeRole").attr["ext-category"] }
245 local current = #object.event_data.targets + 1
246 object.event_data.targets[current] = { addresses = {}, noderole = noderole }
247 for _, tag in ipairs(entry.tags) do
248 object.event_data.targets[current].addresses[#object.event_data.targets[current].addresses + 1] = { text = tag:get_text(), cat = tag.attr.category, ext = tag.attr["ext-category"] }
249 end
250 end
251 if expectation then
252 object.event_data.expectation = {
253 action = expectation.attr.action,
254 desc = expectation:get_child("Description") and expectation:get_child("Description"):get_text()
255 }
256 end
257 elseif tag.name == "History" then
258 object.history = {}
259 for _, t in ipairs(tag.tags) do
260 object.history[#object.history + 1] = {
261 action = t.attr.action,
262 date = t:get_child("DateTime"):get_text(),
263 desc = t:get_chilld("Description"):get_text()
264 }
265 end
266 end
267 end
268
269 local function stanza_parser(stanza)
270 local object = {}
271
272 if stanza:get_child("report", xmlns_inc) then
273 local report = st.clone(stanza):get_child("report", xmlns_inc):get_child("Incident", xmlns_iodef)
274 for _, tag in ipairs(report.tags) do do_tag_mapping(tag, object) end
275 elseif stanza:get_child("request", xmlns_inc) then
276 local request = st.clone(stanza):get_child("request", xmlns_inc):get_child("Incident", xmlns_iodef)
277 for _, tag in ipairs(request.tags) do do_tag_mapping(tag, object) end
278 elseif stanza:get_child("response", xmlns_inc) then
279 local response = st.clone(stanza):get_child("response", xmlns_inc):get_child("Incident", xmlns_iodef)
280 for _, tag in ipairs(response.tags) do do_tag_mapping(tag, object) end
281 end
282
283 return object
284 end
285
286 local function stanza_construct(id)
287 if not id then return nil
288 else
289 local object = incidents[id].data
290 local s_type = incidents[id].type
291 local stanza = st.iq():tag(s_type or "report", { xmlns = xmlns_inc })
292 stanza:tag("Incident", { xmlns = xmlns_iodef, purpose = incidents[id].purpose })
293 :tag("IncidentID", { name = object.id.name }):text(object.id.text):up()
294 :tag("StartTime"):text(object.start_time):up()
295 :tag("EndTime"):text(object.end_time):up()
296 :tag("ReportTime"):text(object.report_time):up()
297 :tag("Description", { ["xml:lang"] = object.desc.lang }):text(object.desc.text):up():up();
298
299 local incident = stanza:get_child(s_type, xmlns_inc):get_child("Incident", xmlns_iodef)
300
301 for _, contact in ipairs(object.contacts) do
302 incident:tag("Contact", { role = (contact.ext_role and "ext-role") or contact.role,
303 ["ext-role"] = (contact.ext_role and contact.role) or nil,
304 type = (contact.ext_type and "ext-type") or contact.type,
305 ["ext-type"] = (contact.ext_type and contact.type) or nil })
306 :tag("Email"):text(contact.email):up()
307 :tag("Telephone"):text(contact.telephone):up()
308 :tag("PostalAddress"):text(contact.postaladdr):up()
309 :tag("AdditionalData")
310 :tag("jid", { xmlns = contact.xmlns }):text(contact.jid):up():up():up()
311
312 end
313
314 incident:tag("RelatedActivity"):up();
315
316 for _, related in ipairs(object.related) do
317 incident:get_child("RelatedActivity")
318 :tag("IncidentID", { name = related.name }):text(related.text):up();
319 end
320
321 incident:tag("Assessment")
322 :tag("Impact", {
323 lang = object.assessment.lang,
324 severity = object.assessment.severity,
325 completion = object.assessment.completion,
326 type = object.assessment.type
327 }):up():up();
328
329 incident:tag("EventData")
330 :tag("Flow")
331 :tag("System", { category = "source" }):up()
332 :tag("System", { category = "target" }):up():up():up();
333
334 local e_data = incident:get_child("EventData")
335
336 local sources = e_data:get_child("Flow").tags[1]
337 local targets = e_data:get_child("Flow").tags[2]
338
339 for _, source in ipairs(object.event_data.sources) do
340 sources:tag("Node")
341 :tag("Address", { category = source.address.cat, ["ext-category"] = source.address.ext })
342 :text(source.address.text):up()
343 :tag("Counter", { type = source.counter.type, ["ext-type"] = source.counter.ext_type })
344 :text(source.counter.value):up():up();
345 end
346
347 for _, target in ipairs(object.event_data.targets) do
348 targets:tag("Node"):up() ; local node = targets.tags[#targets.tags]
349 for _, address in ipairs(target.addresses) do
350 node:tag("Address", { category = address.cat, ["ext-category"] = address.ext }):text(address.text):up();
351 end
352 node:tag("NodeRole", { category = target.noderole.cat, ["ext-category"] = target.noderole.ext }):up();
353 end
354
355 if object.event_data.expectation then
356 e_data:tag("Expectation", { action = object.event_data.expectation.action }):up();
357 if object.event_data.expectation.desc then
358 local expectation = e_data:get_child("Expectation")
359 expectation:tag("Description"):text(object.event_data.expectation.desc):up();
360 end
361 end
362
363 if object.history then
364 local history = incident:tag("History"):up();
365
366 for _, item in ipairs(object.history) do
367 history:tag("HistoryItem", { action = item.action })
368 :tag("DateTime"):text(item.date):up()
369 :tag("Description"):text(item.desc):up():up();
370 end
371 end
372
373 -- Sanitize contact empty tags
374 for _, tag in ipairs(incident) do
375 if tag.name == "Contact" then
376 for i, check in ipairs(tag) do
377 if (check.name == "Email" or check.name == "PostalAddress" or check.name == "Telephone") and
378 not check:get_text() then
379 table.remove(tag, i)
380 end
381 end
382 end
383 end
384
385 if s_type == "request" then stanza.attr.type = "get"
386 elseif s_type == "response" then stanza.attr.type = "set"
387 else stanza.attr.type = "set" end
388
389 return stanza
390 end
391 end
392
393
394 _M = {} -- wraps methods into the library.
395 _M.ft_str = ft_str
396 _M.get_incident_layout = get_incident_layout
397 _M.render_list = render_list
398 _M.render_single = render_single
399 _M.get_type = get_type
400 _M.stanza_parser = stanza_parser
401 _M.stanza_construct = stanza_construct
402 _M.set_my_host = function(host) my_host = host end
403
404 return _M
405