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emacsploit.el
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emacsploit.el
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;;; emacsploit.el --- Emacs client for Exploit-DB -*- lexical-binding: t; -*-
;; Copyright (C) 2022 4shen0ne
;;
;; Author: 4shen0ne <https://github.com/zrquan>
;; Maintainer: 4shen0ne <[email protected]>
;;
;; This file is not part of GNU Emacs.
;;; Commentary:
;;
;; Emacs client for Exploit-DB.
;;; Code:
(require 'xml)
(require 'json)
(defconst emacsploit--base-url "https://www.exploit-db.com/?%s")
(defconst emacsploit--exploits-url "https://www.exploit-db.com/exploits/%d")
(defvar emacsploit-supported-langs
'((python-mode . "py")
(ruby-mode . "rb")
(html-mode . "html")
(text-mode . "txt"))
"Mapping between major-modes and language class.
Used to select appropriate mode from fetched exploit (based on class).")
(defvar emacsploit-table-mode-map
(let ((map (make-sparse-keymap)))
(set-keymap-parent map tabulated-list-mode-map)
(define-key map (kbd "<return>") 'emacsploit-open-current)
(define-key map (kbd "<C-return>") 'emacsploit-browse-current)
map)
"Keymap for `emacsploit-table-mode'.")
(defun unify-newlines (input-string)
"Replace CRLF in INPUT-STRING with LF."
(replace-regexp-in-string "\r\n?\\|\n" "\n" input-string))
(defun emacsploit--decode-entities (html)
"Decode HTML entities in HTML string."
(with-temp-buffer
(insert html)
(goto-char (point-min))
(while (re-search-forward "&\\(#[0-9]+\\|[a-zA-Z]+\\);" nil t)
(replace-match
(pcase (match-string 1)
("lt" "<")
("gt" ">")
("amp" "&")
("quot" "\"")
("apos" "'")
((pred (string-prefix-p "#")) (char-to-string (string-to-number (substring (match-string 1) 1))))
(_ (match-string 0)))
t t))
(buffer-string)))
(defun emacsploit--retrieve-data (params)
(let ((url (format emacsploit--base-url params)))
(url-retrieve-synchronously url)))
(defun emacsploit--retrieve-exploit (id)
(let* ((url (format emacsploit--exploits-url id)))
(url-retrieve-synchronously url)))
(defun emacsploit-make-query-string (params)
"Return a query string constructed from PARAMS."
(mapconcat (lambda (param)
(concat (url-hexify-string (car param))
"="
(url-hexify-string (cdr param))))
params "&"))
(defun emacsploit-open-current ()
"Open the currently selected exploit by ID."
(interactive)
(let ((id (tabulated-list-get-id)))
(when (and id (eq major-mode 'emacsploit-table-mode))
(emacsploit-search-by-id (string-to-number id)))))
(defun emacsploit-browse-current ()
"Browse the currently selected exploit by ID in browser."
(interactive)
(let ((id (tabulated-list-get-id)))
(when (and id (eq major-mode 'emacsploit-table-mode))
(emacsploit-browse-by-id (string-to-number id)))))
(define-derived-mode emacsploit-table-mode tabulated-list-mode "Exploit-DB"
"Major mode for displaying a table of exploits from Exploit-DB."
(setq tabulated-list-format [("Date" 12 nil)
("Type" 10 nil)
("Title" 0 nil)]
tabulated-list-padding 2
tabulated-list-sort-key nil)
(tabulated-list-init-header))
(defun emacsploit--tabulated-entry (data)
"Create a tabulated list entry from DATA."
(let* ((desc (cdr (assoc 'description data)))
(edb-id (aref desc 0))
(title (aref desc 1))
(date (cdr (assoc 'date_published data)))
(type (cdr (assoc 'type_id data))))
(list edb-id (vector date type (emacsploit--decode-entities title)))))
(defun emacsploit-search-by-id (edb-id)
"Fetch and display the exploit code by EDB-ID."
(interactive "nEDB-ID: ")
(let* ((exp-buffer-name (format "*exploit %d*" edb-id))
(exp-buffer (get-buffer exp-buffer-name)))
(if (bufferp exp-buffer)
(switch-to-buffer-other-window exp-buffer)
(progn
(message "Searching exploit %d..." edb-id)
(setq exp-buffer (emacsploit--retrieve-exploit edb-id))
(with-current-buffer exp-buffer
(rename-buffer exp-buffer-name t)
(goto-char (point-min))
(if (re-search-forward
"<code class=\"language-\\(\\w+\\)\"[^>]*>\\([\0-\377[:nonascii:]]*\\)</code>"
nil t)
(let* ((lang (match-string 1))
(content (match-string 2))
(mode (car (rassoc lang emacsploit-supported-langs))))
(erase-buffer)
(insert (emacsploit--decode-entities (unify-newlines content)))
(goto-char (point-min))
;; choose major mode
(when (fboundp mode)
(funcall mode))
(set-buffer-modified-p nil))
(message "No code found for exploit %d" edb-id)))
(switch-to-buffer-other-window exp-buffer)))))
(defun emacsploit-browse-by-id (edb-id)
"Open the browser to view the exploit page by EDB-ID."
(interactive "nEDB-ID: ")
(browse-url (format emacsploit--exploits-url edb-id)))
;;;###autoload
(defun emacsploit-search-by-title (text)
"Search exploits by title (from TEXT) and display the results in a table."
(interactive "MTitle: ")
(let* ((exp-buffer-name (format "*exploit %s*" text))
(exp-buffer (get-buffer exp-buffer-name))
(request-params (emacsploit-make-query-string
`(("columns[0][data]" . "date_published")
("columns[0][name]" . "date_published")
("columns[1][data]" . "download")
("columns[1][name]" . "download")
("columns[1][searchable]" . "false")
("columns[2][data]" . "application_md5")
("columns[2][name]" . "application_md5")
("columns[3][data]" . "verified")
("columns[3][name]" . "verified")
("columns[4][data]" . "description")
("columns[4][name]" . "description")
("columns[5][data]" . "type_id")
("columns[5][name]" . "type_id")
("columns[6][data]" . "platform_id")
("columns[6][name]" . "platform_id")
("columns[7][data]" . "author_id")
("columns[7][name]" . "author_id")
("columns[7][searchable]" . "false")
("columns[8][data]" . "code")
("columns[8][name]" . "code.code")
("columns[9][data]" . "id")
("columns[9][name]" . "id")
("columns[9][searchable]" . "false")
("order[0][column]" . "9")
("order[0][dir]" . "desc")
("start" . "0")
("length" . "60")
("search[value]" . ,text)
("search[regex]" . "false"))))
(url-request-extra-headers '(("x-requested-with" . "XMLHttpRequest"))))
(if (bufferp exp-buffer)
(switch-to-buffer-other-window exp-buffer)
(progn
(message "Searching exploit %s..." text)
(setq exp-buffer (emacsploit--retrieve-data request-params))
(with-current-buffer exp-buffer
(rename-buffer exp-buffer-name t)
(goto-char url-http-end-of-headers)
(emacsploit-table-mode)
(setq tabulated-list-entries
(mapcar #'emacsploit--tabulated-entry
;; get data object from json response
(cdr (assoc 'data (json-read)))))
(tabulated-list-print)
(set-buffer-modified-p nil))
(switch-to-buffer-other-window exp-buffer)))))
;;;###autoload
(defun emacsploit-latest-exploits (n)
"Fetch and display the latest N exploits from Exploit-DB."
(interactive "nNumber of latest exploits to fetch: ")
(let* ((exp-buffer-name (format "*latest-exploits-%d*" n))
(exp-buffer (get-buffer exp-buffer-name))
(request-params (emacsploit-make-query-string
`(("columns[0][data]" . "date_published")
("columns[0][name]" . "date_published")
("columns[1][data]" . "download")
("columns[1][name]" . "download")
("columns[1][searchable]" . "false")
("columns[2][data]" . "application_md5")
("columns[2][name]" . "application_md5")
("columns[3][data]" . "verified")
("columns[3][name]" . "verified")
("columns[4][data]" . "description")
("columns[4][name]" . "description")
("columns[5][data]" . "type_id")
("columns[5][name]" . "type_id")
("columns[6][data]" . "platform_id")
("columns[6][name]" . "platform_id")
("columns[7][data]" . "author_id")
("columns[7][name]" . "author_id")
("columns[7][searchable]" . "false")
("columns[8][data]" . "code")
("columns[8][name]" . "code.code")
("columns[9][data]" . "id")
("columns[9][name]" . "id")
("columns[9][searchable]" . "false")
("order[0][column]" . "0") ; Order by date published
("order[0][dir]" . "desc") ; Descending order
("start" . "0")
("length" . ,(number-to-string n))
("search[value]" . "")
("search[regex]" . "false"))))
(url-request-extra-headers '(("x-requested-with" . "XMLHttpRequest"))))
(if (bufferp exp-buffer)
(switch-to-buffer-other-window exp-buffer)
(progn
(message "Fetching latest %d exploits..." n)
(setq exp-buffer (emacsploit--retrieve-data request-params))
(with-current-buffer exp-buffer
(rename-buffer exp-buffer-name t)
(goto-char url-http-end-of-headers)
(emacsploit-table-mode)
(setq tabulated-list-entries
(mapcar #'emacsploit--tabulated-entry
(cdr (assoc 'data (json-read)))))
(tabulated-list-print)
(set-buffer-modified-p nil))
(switch-to-buffer-other-window exp-buffer)))))
(provide 'emacsploit)
;;; emacsploit.el ends here