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Yann Esposito (Yogsototh) 7 years ago
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.gitignore vendored
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/target
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CHANGELOG.md
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# Change Log
All notable changes to this project will be documented in this file. This change log follows the conventions of [keepachangelog.com](http://keepachangelog.com/).
## [Unreleased]
### Changed
- Add a new arity to `make-widget-async` to provide a different widget shape.
## [0.1.1] - 2016-07-04
### Changed
- Documentation on how to make the widgets.
### Removed
- `make-widget-sync` - we're all async, all the time.
### Fixed
- Fixed widget maker to keep working when daylight savings switches over.
## 0.1.0 - 2016-07-04
### Added
- Files from the new template.
- Widget maker public API - `make-widget-sync`.
[Unreleased]: https://github.com/your-name/cef-parser/compare/0.1.1...HEAD
[0.1.1]: https://github.com/your-name/cef-parser/compare/0.1.0...0.1.1

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LICENSE
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README.md
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# cef-parser
A Clojure library designed to parse CEF.
## Usage
~~~clojure
> (require '[cef-parser.core :refer :all])
> (parse-cef (str "2016-07-04T10:09:33 CEF:0|Sec\\|urity|threat\\\\manager|1.0|100|worm successfully stopped|10|"
~ "src\\\\he=10.0.0.1 dst=2.1.2.2 spt=1232 filePath=/user/username/dir/my file name.txt "
~ "E\\=mc2=Einstein formula my\\ file=foo bar"))
{:version "Sec|urity"
:device-vendor "threat\\manager"
:device-product "1.0"
:device_event_class_id "100"
:name "worm successfully stopped"
:severity "10"
:extension {"spt" "1232"
"dst" "2.1.2.2"
"filePath" "/user/username/dir/my file name.txt"
"src\\he" "10.0.0.1"
"my file" "foo bar"
"E=mc2" "Einstein formula"}}
~~~
## License
Copyright © 2016 Cisco
Distributed under the Eclipse Public License either version 1.0 or (at
your option) any later version.

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doc/intro.md
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# Introduction to cef-parser
TODO: write [great documentation](http://jacobian.org/writing/what-to-write/)

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project.clj
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(defproject cef-parser "0.1.0-SNAPSHOT"
:description "CEF Parser"
:url "http://example.com/FIXME"
:license {:name "Eclipse Public License"
:url "http://www.eclipse.org/legal/epl-v10.html"}
:dependencies [[org.clojure/clojure "1.8.0"]
[instaparse "1.4.2"]])

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src/cef_parser/core.clj
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(ns cef-parser.core
(:require [instaparse.core :as insta]))
(def cef-grammar
"CEF Grammar"
(insta/parser
"cef = #'.*?CEF:' version <'|'> device_vendor <'|'> device_product <'|'> device_version <'|'> device_event_class_id <'|'> name <'|'> severity (<'|'> extension)?
version = #'\\d+'
device_vendor = string
device_product = string
device_version = string
device_event_class_id = string
name = string
severity = #'(?i)(unknown|low|medium|high|very-high)'| #'[1-9]'|'10'
extension = (key <'='> value <' '>?)*
<string> = (#'[^\\\\]' | escaped-char)+
escaped-char = (<'\\\\'> ('|' | '\\\\' | 'n' | 'r'))
key = (#'[^\\\\ ]' | escaped-char-key)(#'[^\\\\ ]' | escaped-char-key)*
escaped-char-key = (<'\\\\'> ('=' | '\\\\' | ' ' | 'n' | 'r' ) )
value = ((#'[^\\\\ ]*' | escaped-char-key) (' '|Epsilon))+
"))
(defn parse-cef [txt]
(insta/transform
{:string str
:escaped-char (fn [& args]
(case (first args)
"n" "\n"
"r" "\r"
(apply str args)))
:escaped-char-key (fn [& args]
(case (first args)
"n" "\n"
"r" "\r"
(apply str args)))
:device_vendor str
:device_product str
:device_version str
:device_event_class_id str
:name str
:severity str
:extension hash-map
:key str
:version str
:value str
:cef (fn
([_ _ version device-vendor device-product device-event-class-id name severity]
(merge
{:version version
:device-vendor device-vendor
:device-product device-product
:device_event_class_id device-event-class-id
:name name
:severity severity}))
([_ _ version device-vendor device-product device-event-class-id name severity extension]
(merge
{:version version
:device-vendor device-vendor
:device-product device-product
:device_event_class_id device-event-class-id
:name name
:severity severity
:extension extension})))}
(cef-grammar txt)))
(defn tst [] (parse-cef excef))

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test/cef_parser/core_test.clj
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(ns cef-parser.core-test
(:require [clojure.test :refer :all]
[cef-parser.core :refer :all]))
;; Most examples can be found in page 8 of
;; https://www.protect724.hpe.com/docs/DOC-1072
(deftest pipe-test
(let [cef (parse-cef
"Sep 19 08:26:10 host CEF:0|security|threatmanager|1.0|100|detected a \\| in message|10|src=10.0.0.1 act=blocked a | dst=1.1.1.1")]
(is (= (:name cef)
"detected a | in message"))))
(deftest backslash-test
(let [cef (parse-cef
"Sep 19 08:26:10 host CEF:0|security|threatmanager|1.0|100|detected a \\\\ in packet|10|src=10.0.0.1 act=blocked a \\\\ dst=1.1.1.1")]
(is (= (get-in cef [:extension "act"])
"blocked a \\"))))
(deftest equal-sign-test
(let [cef (parse-cef
"Sep 19 08:26:10 host CEF:0|security|threatmanager|1.0|100|detected a = in message|10|src=10.0.0.1 act=blocked a \\= dst=1.1.1.1")]
(is (= (get-in cef [:extension "act"])
"blocked a ="))))
(deftest multi-line-ex-test
(let [cef (parse-cef
"Sep 19 08:26:10 host CEF:0|security|threatmanager|1.0|100|Detected a threat. No action needed.|10|src=10.0.0.1 msg=Detected a threat.\\n No action needed.")]
(is (= (get-in cef [:extension "msg"])
"Detected a threat.\n No action needed."))))
(deftest tricky-CEF-test
(let [cef (parse-cef
(str "2016-07-04T10:09:33 CEF:0|Sec\\|urity|threat\\\\manager|1.0|100|worm successfully stopped|10|"
"src\\\\he=10.0.0.1 dst=2.1.2.2 spt=1232 filePath=/user/username/dir/my file name.txt "
"E\\=mc2=Einstein formula my\\ file=foo bar"))]
(is (= {:version "Sec|urity"
:device-vendor "threat\\manager"
:device-product "1.0"
:device_event_class_id "100"
:name "worm successfully stopped"
:severity "10"
:extension {"spt" "1232"
"dst" "2.1.2.2"
"filePath" "/user/username/dir/my file name.txt"
"src\\he" "10.0.0.1"
"my file" "foo bar"
"E=mc2" "Einstein formula"}}
cef))))
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