--- /dev/null
+;;; netrc.el --- .netrc parsing functionality
+;; Copyright (C) 1996-2016 Free Software Foundation, Inc.
+
+;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
+;; Keywords: news
+;;
+;; Modularized by Ted Zlatanov <tzz@lifelogs.com>
+;; when it was part of Gnus.
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; Just the .netrc parsing functionality, abstracted so other packages
+;; besides Gnus can use it.
+
+;;; Code:
+
+;;;
+;;; .netrc and .authinfo rc parsing
+;;;
+
+(defgroup netrc nil
+ "Netrc configuration."
+ :group 'comm)
+
+(defcustom netrc-file "~/.authinfo"
+ "File where user credentials are stored."
+ :version "24.1"
+ :type 'file
+ :group 'netrc)
+
+(defvar netrc-services-file "/etc/services"
+ "The name of the services file.")
+
+(defvar netrc-cache nil)
+
+(defun netrc-parse (&optional file)
+ (interactive "fFile to Parse: ")
+ "Parse FILE and return a list of all entries in the file."
+ (unless file
+ (setq file netrc-file))
+ (if (listp file)
+ ;; We got already parsed contents; just return it.
+ file
+ (when (file-exists-p file)
+ (with-temp-buffer
+ (let ((tokens '("machine" "default" "login"
+ "password" "account" "macdef" "force"
+ "port"))
+ alist elem result pair)
+ (if (and netrc-cache
+ (equal (car netrc-cache) (nth 5 (file-attributes file))))
+ (insert (base64-decode-string (rot13-string (cdr netrc-cache))))
+ (insert-file-contents file)
+ (when (string-match "\\.gpg\\'" file)
+ ;; Store the contents of the file heavily encrypted in memory.
+ (setq netrc-cache (cons (nth 5 (file-attributes file))
+ (rot13-string
+ (base64-encode-string
+ (buffer-string)))))))
+ (goto-char (point-min))
+ ;; Go through the file, line by line.
+ (while (not (eobp))
+ (narrow-to-region (point) (point-at-eol))
+ ;; For each line, get the tokens and values.
+ (while (not (eobp))
+ (skip-chars-forward "\t ")
+ ;; Skip lines that begin with a "#".
+ (if (eq (char-after) ?#)
+ (goto-char (point-max))
+ (unless (eobp)
+ (setq elem
+ (if (= (following-char) ?\")
+ (read (current-buffer))
+ (buffer-substring
+ (point) (progn (skip-chars-forward "^\t ")
+ (point)))))
+ (cond
+ ((equal elem "macdef")
+ ;; We skip past the macro definition.
+ (widen)
+ (while (and (zerop (forward-line 1))
+ (looking-at "$")))
+ (narrow-to-region (point) (point)))
+ ((member elem tokens)
+ ;; Tokens that don't have a following value are ignored,
+ ;; except "default".
+ (when (and pair (or (cdr pair)
+ (equal (car pair) "default")))
+ (push pair alist))
+ (setq pair (list elem)))
+ (t
+ ;; Values that haven't got a preceding token are ignored.
+ (when pair
+ (setcdr pair elem)
+ (push pair alist)
+ (setq pair nil)))))))
+ (when alist
+ (push (nreverse alist) result))
+ (setq alist nil
+ pair nil)
+ (widen)
+ (forward-line 1))
+ (nreverse result))))))
+
+(defun netrc-machine (list machine &optional port defaultport)
+ "Return the netrc values from LIST for MACHINE or for the default entry.
+If PORT specified, only return entries with matching port tokens.
+Entries without port tokens default to DEFAULTPORT."
+ (let ((rest list)
+ result)
+ (while list
+ (when (equal (cdr (assoc "machine" (car list))) machine)
+ (push (car list) result))
+ (pop list))
+ (unless result
+ ;; No machine name matches, so we look for default entries.
+ (while rest
+ (when (assoc "default" (car rest))
+ (let ((elem (car rest)))
+ (setq elem (delete (assoc "default" elem) elem))
+ (push elem result)))
+ (pop rest)))
+ (when result
+ (setq result (nreverse result))
+ (if (not port)
+ (car result)
+ (while (and result
+ (not (netrc-port-equal
+ (or port defaultport "nntp")
+ ;; when port is not given in the netrc file,
+ ;; it should mean "any port"
+ (or (netrc-get (car result) "port")
+ defaultport port))))
+ (pop result))
+ (car result)))))
+
+(defun netrc-machine-user-or-password (mode authinfo-file-or-list machines ports defaults)
+ "Get the user name or password according to MODE from AUTHINFO-FILE-OR-LIST.
+Matches a machine from MACHINES and a port from PORTS, giving
+default ports DEFAULTS to `netrc-machine'.
+
+MODE can be \"login\" or \"password\", suitable for passing to
+`netrc-get'."
+ (let ((authinfo-list (if (stringp authinfo-file-or-list)
+ (netrc-parse authinfo-file-or-list)
+ authinfo-file-or-list))
+ (ports (or ports '(nil)))
+ (defaults (or defaults '(nil)))
+ info)
+ (if (listp mode)
+ (setq info
+ (mapcar
+ (lambda (mode-element)
+ (netrc-machine-user-or-password
+ mode-element
+ authinfo-list
+ machines
+ ports
+ defaults))
+ mode))
+ (dolist (machine machines)
+ (dolist (default defaults)
+ (dolist (port ports)
+ (let ((alist (netrc-machine authinfo-list machine port default)))
+ (setq info (or (netrc-get alist mode) info)))))))
+ info))
+
+(defun netrc-get (alist type)
+ "Return the value of token TYPE from ALIST."
+ (cdr (assoc type alist)))
+
+(defun netrc-port-equal (port1 port2)
+ (when (numberp port1)
+ (setq port1 (or (netrc-find-service-name port1) port1)))
+ (when (numberp port2)
+ (setq port2 (or (netrc-find-service-name port2) port2)))
+ (equal port1 port2))
+
+(defun netrc-parse-services ()
+ (when (file-exists-p netrc-services-file)
+ (let ((services nil))
+ (with-temp-buffer
+ (insert-file-contents netrc-services-file)
+ (while (search-forward "#" nil t)
+ (delete-region (1- (point)) (point-at-eol)))
+ (goto-char (point-min))
+ (while (re-search-forward
+ "^ *\\([^ \n\t]+\\)[ \t]+\\([0-9]+\\)/\\([^ \t\n]+\\)" nil t)
+ (push (list (match-string 1) (string-to-number (match-string 2))
+ (intern (downcase (match-string 3))))
+ services))
+ (nreverse services)))))
+
+(defun netrc-find-service-name (number &optional type)
+ (let ((services (netrc-parse-services))
+ service)
+ (setq type (or type 'tcp))
+ (while (and (setq service (pop services))
+ (not (and (= number (cadr service))
+ (eq type (car (cddr service)))))))
+ (car service)))
+
+;;;###autoload
+(defun netrc-credentials (machine &rest ports)
+ "Return a user name/password pair.
+Port specifications will be prioritized in the order they are
+listed in the PORTS list."
+ (let ((list (netrc-parse))
+ found)
+ (if (not ports)
+ (setq found (netrc-machine list machine))
+ (while (and ports
+ (not found))
+ (setq found (netrc-machine list machine (pop ports)))))
+ (when found
+ (list (cdr (assoc "login" found))
+ (cdr (assoc "password" found))))))
+
+(provide 'netrc)
+
+;;; netrc.el ends here
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