1 ;;; auth-source.el --- authentication sources for Gnus and Emacs
3 ;; Copyright (C) 2008-2011 Free Software Foundation, Inc.
5 ;; Author: Ted Zlatanov <tzz@lifelogs.com>
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software: you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation, either version 3 of the License, or
13 ;; (at your option) any later version.
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
25 ;; This is the auth-source.el package. It lets users tell Gnus how to
26 ;; authenticate in a single place. Simplicity is the goal. Instead
27 ;; of providing 5000 options, we'll stick to simple, easy to
28 ;; understand options.
30 ;; See the auth.info Info documentation for details.
34 ;; - never decode the backend file unless it's necessary
35 ;; - a more generic way to match backends and search backend contents
36 ;; - absorb netrc.el and simplify it
37 ;; - protect passwords better
38 ;; - allow creating and changing netrc lines (not files) e.g. change a password
42 (require 'password-cache)
46 (eval-when-compile (require 'cl))
48 (or (ignore-errors (require 'eieio))
49 ;; gnus-fallback-lib/ from gnus/lisp/gnus-fallback-lib
51 (let ((load-path (cons (expand-file-name
52 "gnus-fallback-lib/eieio"
53 (file-name-directory (locate-library "gnus")))
57 "eieio not found in `load-path' or gnus-fallback-lib/ directory.")))
59 (autoload 'secrets-create-item "secrets")
60 (autoload 'secrets-delete-item "secrets")
61 (autoload 'secrets-get-alias "secrets")
62 (autoload 'secrets-get-attributes "secrets")
63 (autoload 'secrets-get-secret "secrets")
64 (autoload 'secrets-list-collections "secrets")
65 (autoload 'secrets-search-items "secrets")
67 (autoload 'rfc2104-hash "rfc2104")
69 (defvar secrets-enabled)
71 (defgroup auth-source nil
72 "Authentication sources."
73 :version "23.1" ;; No Gnus
77 (defcustom auth-source-cache-expiry 7200
78 "How many seconds passwords are cached, or nil to disable
79 expiring. Overrides `password-cache-expiry' through a
82 :type '(choice (const :tag "Never" nil)
83 (const :tag "All Day" 86400)
84 (const :tag "2 Hours" 7200)
85 (const :tag "30 Minutes" 1800)
86 (integer :tag "Seconds")))
88 (defclass auth-source-backend ()
93 :documentation "The backend type.")
94 (source :initarg :source
97 :documentation "The backend source.")
102 :documentation "The backend host.")
107 :documentation "The backend user.")
112 :documentation "The backend protocol.")
113 (create-function :initarg :create-function
117 :documentation "The create function.")
118 (search-function :initarg :search-function
122 :documentation "The search function.")))
124 (defcustom auth-source-protocols '((imap "imap" "imaps" "143" "993")
125 (pop3 "pop3" "pop" "pop3s" "110" "995")
129 "List of authentication protocols and their names"
132 :version "23.2" ;; No Gnus
133 :type '(repeat :tag "Authentication Protocols"
134 (cons :tag "Protocol Entry"
135 (symbol :tag "Protocol")
137 (string :tag "Name")))))
139 ;;; generate all the protocols in a format Customize can use
140 ;;; TODO: generate on the fly from auth-source-protocols
141 (defconst auth-source-protocols-customize
143 (let ((p (car-safe a)))
145 :tag (upcase (symbol-name p))
147 auth-source-protocols))
149 (defvar auth-source-creation-defaults nil
150 "Defaults for creating token values. Usually let-bound.")
152 (defvar auth-source-creation-prompts nil
153 "Default prompts for token values. Usually let-bound.")
155 (make-obsolete 'auth-source-hide-passwords nil "Emacs 24.1")
157 (defcustom auth-source-save-behavior 'ask
158 "If set, auth-source will respect it for save behavior."
160 :version "23.2" ;; No Gnus
162 :tag "auth-source new token save behavior"
163 (const :tag "Always save" t)
164 (const :tag "Never save" nil)
165 (const :tag "Ask" ask)))
167 (defcustom auth-source-save-secrets nil
168 "If set, auth-source will respect it for password tokens behavior."
170 :version "23.2" ;; No Gnus
172 :tag "auth-source new password token behavior"
173 (const :tag "Use GPG tokens" gpg)
174 (const :tag "Save unencrypted" nil)
175 (const :tag "Ask" ask)))
177 (defvar auth-source-magic "auth-source-magic ")
179 (defcustom auth-source-do-cache t
180 "Whether auth-source should cache information with `password-cache'."
182 :version "23.2" ;; No Gnus
185 (defcustom auth-source-debug nil
186 "Whether auth-source should log debug messages.
188 If the value is nil, debug messages are not logged.
190 If the value is t, debug messages are logged with `message'. In
191 that case, your authentication data will be in the clear (except
194 If the value is a function, debug messages are logged by calling
195 that function using the same arguments as `message'."
197 :version "23.2" ;; No Gnus
199 :tag "auth-source debugging mode"
200 (const :tag "Log using `message' to the *Messages* buffer" t)
201 (const :tag "Log all trivia with `message' to the *Messages* buffer"
203 (function :tag "Function that takes arguments like `message'")
204 (const :tag "Don't log anything" nil)))
206 (defcustom auth-sources '("~/.authinfo.gpg" "~/.authinfo" "~/.netrc")
207 "List of authentication sources.
209 The default will get login and password information from
210 \"~/.authinfo.gpg\", which you should set up with the EPA/EPG
211 packages to be encrypted. If that file doesn't exist, it will
212 try the unencrypted version \"~/.authinfo\" and the famous
215 See the auth.info manual for details.
217 Each entry is the authentication type with optional properties.
219 It's best to customize this with `M-x customize-variable' because the choices
220 can get pretty complex."
222 :version "24.1" ;; No Gnus
223 :type `(repeat :tag "Authentication Sources"
225 (string :tag "Just a file")
226 (const :tag "Default Secrets API Collection" 'default)
227 (const :tag "Login Secrets API Collection" "secrets:Login")
228 (const :tag "Temp Secrets API Collection" "secrets:session")
229 (list :tag "Source definition"
230 (const :format "" :value :source)
231 (choice :tag "Authentication backend choice"
232 (string :tag "Authentication Source (file)")
234 :tag "Secret Service API/KWallet/GNOME Keyring"
235 (const :format "" :value :secrets)
236 (choice :tag "Collection to use"
237 (string :tag "Collection name")
238 (const :tag "Default" 'default)
239 (const :tag "Login" "Login")
241 :tag "Temporary" "session"))))
242 (repeat :tag "Extra Parameters" :inline t
243 (choice :tag "Extra parameter"
246 (const :format "" :value :host)
247 (choice :tag "Host (machine) choice"
250 :tag "Regular expression")))
253 (const :format "" :value :port)
257 ,@auth-source-protocols-customize))
258 (list :tag "User" :inline t
259 (const :format "" :value :user)
260 (choice :tag "Personality/Username"
262 (string :tag "Name")))))))))
264 (defcustom auth-source-gpg-encrypt-to t
265 "List of recipient keys that `authinfo.gpg' encrypted to.
266 If the value is not a list, symmetric encryption will be used."
268 :version "24.1" ;; No Gnus
269 :type '(choice (const :tag "Symmetric encryption" t)
270 (repeat :tag "Recipient public keys"
271 (string :tag "Recipient public key"))))
273 ;; temp for debugging
274 ;; (unintern 'auth-source-protocols)
275 ;; (unintern 'auth-sources)
276 ;; (customize-variable 'auth-sources)
277 ;; (setq auth-sources nil)
278 ;; (format "%S" auth-sources)
279 ;; (customize-variable 'auth-source-protocols)
280 ;; (setq auth-source-protocols nil)
281 ;; (format "%S" auth-source-protocols)
282 ;; (auth-source-pick nil :host "a" :port 'imap)
283 ;; (auth-source-user-or-password "login" "imap.myhost.com" 'imap)
284 ;; (auth-source-user-or-password "password" "imap.myhost.com" 'imap)
285 ;; (auth-source-user-or-password-imap "login" "imap.myhost.com")
286 ;; (auth-source-user-or-password-imap "password" "imap.myhost.com")
287 ;; (auth-source-protocol-defaults 'imap)
289 ;; (let ((auth-source-debug 'debug)) (auth-source-do-debug "hello"))
290 ;; (let ((auth-source-debug t)) (auth-source-do-debug "hello"))
291 ;; (let ((auth-source-debug nil)) (auth-source-do-debug "hello"))
292 (defun auth-source-do-debug (&rest msg)
293 (when auth-source-debug
294 (apply 'auth-source-do-warn msg)))
296 (defun auth-source-do-trivia (&rest msg)
297 (when (or (eq auth-source-debug 'trivia)
298 (functionp auth-source-debug))
299 (apply 'auth-source-do-warn msg)))
301 (defun auth-source-do-warn (&rest msg)
303 ;; set logger to either the function in auth-source-debug or 'message
304 ;; note that it will be 'message if auth-source-debug is nil
305 (if (functionp auth-source-debug)
311 ;;; (auth-source-read-char-choice "enter choice? " '(?a ?b ?q))
312 (defun auth-source-read-char-choice (prompt choices)
313 "Read one of CHOICES by `read-char-choice', or `read-char'.
314 `dropdown-list' support is disabled because it doesn't work reliably.
315 Only one of CHOICES will be returned. The PROMPT is augmented
316 with \"[a/b/c] \" if CHOICES is '\(?a ?b ?c\)."
318 (let* ((prompt-choices
319 (apply 'concat (loop for c in choices
320 collect (format "%c/" c))))
321 (prompt-choices (concat "[" (substring prompt-choices 0 -1) "] "))
322 (full-prompt (concat prompt prompt-choices))
325 (while (not (memq k choices))
327 ((fboundp 'read-char-choice)
328 (read-char-choice full-prompt choices))
329 (t (message "%s" full-prompt)
330 (setq k (read-char))))))
333 ;; (auth-source-pick nil :host "any" :port 'imap :user "joe")
334 ;; (auth-source-pick t :host "any" :port 'imap :user "joe")
335 ;; (setq auth-sources '((:source (:secrets default) :host t :port t :user "joe")
336 ;; (:source (:secrets "session") :host t :port t :user "joe")
337 ;; (:source (:secrets "Login") :host t :port t)
338 ;; (:source "~/.authinfo.gpg" :host t :port t)))
340 ;; (setq auth-sources '((:source (:secrets default) :host t :port t :user "joe")
341 ;; (:source (:secrets "session") :host t :port t :user "joe")
342 ;; (:source (:secrets "Login") :host t :port t)
345 ;; (setq auth-sources '((:source "~/.authinfo.gpg" :host t :port t)))
347 ;; (auth-source-backend-parse "myfile.gpg")
348 ;; (auth-source-backend-parse 'default)
349 ;; (auth-source-backend-parse "secrets:Login")
351 (defun auth-source-backend-parse (entry)
352 "Creates an auth-source-backend from an ENTRY in `auth-sources'."
353 (auth-source-backend-parse-parameters
356 ;; take 'default and recurse to get it as a Secrets API default collection
357 ;; matching any user, host, and protocol
359 (auth-source-backend-parse '(:source (:secrets default))))
360 ;; take secrets:XYZ and recurse to get it as Secrets API collection "XYZ"
361 ;; matching any user, host, and protocol
362 ((and (stringp entry) (string-match "^secrets:\\(.+\\)" entry))
363 (auth-source-backend-parse `(:source (:secrets ,(match-string 1 entry)))))
364 ;; take just a file name and recurse to get it as a netrc file
365 ;; matching any user, host, and protocol
367 (auth-source-backend-parse `(:source ,entry)))
369 ;; a file name with parameters
370 ((stringp (plist-get entry :source))
372 (plist-get entry :source)
373 :source (plist-get entry :source)
375 :search-function 'auth-source-netrc-search
376 :create-function 'auth-source-netrc-create))
378 ;; the Secrets API. We require the package, in order to have a
379 ;; defined value for `secrets-enabled'.
381 (not (null (plist-get entry :source))) ; the source must not be nil
382 (listp (plist-get entry :source)) ; and it must be a list
383 (require 'secrets nil t) ; and we must load the Secrets API
384 secrets-enabled) ; and that API must be enabled
386 ;; the source is either the :secrets key in ENTRY or
387 ;; if that's missing or nil, it's "session"
388 (let ((source (or (plist-get (plist-get entry :source) :secrets)
391 ;; if the source is a symbol, we look for the alias named so,
392 ;; and if that alias is missing, we use "Login"
393 (when (symbolp source)
394 (setq source (or (secrets-get-alias (symbol-name source))
397 (if (featurep 'secrets)
399 (format "Secrets API (%s)" source)
402 :search-function 'auth-source-secrets-search
403 :create-function 'auth-source-secrets-create)
405 "auth-source-backend-parse: no Secrets API, ignoring spec: %S" entry)
407 (format "Ignored Secrets API (%s)" source)
414 "auth-source-backend-parse: invalid backend spec: %S" entry)
420 (defun auth-source-backend-parse-parameters (entry backend)
421 "Fills in the extra auth-source-backend parameters of ENTRY.
422 Using the plist ENTRY, get the :host, :port, and :user search
424 (let ((entry (if (stringp entry)
428 (when (setq val (plist-get entry :host))
429 (oset backend host val))
430 (when (setq val (plist-get entry :user))
431 (oset backend user val))
432 (when (setq val (plist-get entry :port))
433 (oset backend port val)))
436 ;; (mapcar 'auth-source-backend-parse auth-sources)
438 (defun* auth-source-search (&rest spec
439 &key type max host user port secret
440 require create delete
442 "Search or modify authentication backends according to SPEC.
444 This function parses `auth-sources' for matches of the SPEC
445 plist. It can optionally create or update an authentication
446 token if requested. A token is just a standard Emacs property
447 list with a :secret property that can be a function; all the
448 other properties will always hold scalar values.
450 Typically the :secret property, if present, contains a password.
452 Common search keys are :max, :host, :port, and :user. In
453 addition, :create specifies how tokens will be or created.
454 Finally, :type can specify which backend types you want to check.
456 A string value is always matched literally. A symbol is matched
457 as its string value, literally. All the SPEC values can be
458 single values (symbol or string) or lists thereof (in which case
459 any of the search terms matches).
461 :create t means to create a token if possible.
463 A new token will be created if no matching tokens were found.
464 The new token will have only the keys the backend requires. For
465 the netrc backend, for instance, that's the user, host, and
470 \(let ((auth-source-creation-defaults '((user . \"defaultUser\")
471 (A . \"default A\"))))
472 (auth-source-search :host \"mine\" :type 'netrc :max 1
473 :P \"pppp\" :Q \"qqqq\"
478 \"Search for any entry matching host 'mine' in backends of type
479 'netrc', maximum one result.
481 Create a new entry if you found none. The netrc backend will
482 automatically require host, user, and port. The host will be
483 'mine'. We prompt for the user with default 'defaultUser' and
484 for the port without a default. We will not prompt for A, Q,
485 or P. The resulting token will only have keys user, host, and
488 :create '(A B C) also means to create a token if possible.
490 The behavior is like :create t but if the list contains any
491 parameter, that parameter will be required in the resulting
492 token. The value for that parameter will be obtained from the
493 search parameters or from user input. If any queries are needed,
494 the alist `auth-source-creation-defaults' will be checked for the
495 default value. If the user, host, or port are missing, the alist
496 `auth-source-creation-prompts' will be used to look up the
497 prompts IN THAT ORDER (so the 'user prompt will be queried first,
498 then 'host, then 'port, and finally 'secret). Each prompt string
499 can use %u, %h, and %p to show the user, host, and port.
503 \(let ((auth-source-creation-defaults '((user . \"defaultUser\")
504 (A . \"default A\")))
505 (auth-source-creation-prompts
506 '((password . \"Enter IMAP password for %h:%p: \"))))
507 (auth-source-search :host '(\"nonesuch\" \"twosuch\") :type 'netrc :max 1
508 :P \"pppp\" :Q \"qqqq\"
513 \"Search for any entry matching host 'nonesuch'
514 or 'twosuch' in backends of type 'netrc', maximum one result.
516 Create a new entry if you found none. The netrc backend will
517 automatically require host, user, and port. The host will be
518 'nonesuch' and Q will be 'qqqq'. We prompt for the password
519 with the shown prompt. We will not prompt for Q. The resulting
520 token will have keys user, host, port, A, B, and Q. It will not
521 have P with any value, even though P is used in the search to
522 find only entries that have P set to 'pppp'.\"
524 When multiple values are specified in the search parameter, the
525 user is prompted for which one. So :host (X Y Z) would ask the
526 user to choose between X, Y, and Z.
528 This creation can fail if the search was not specific enough to
529 create a new token (it's up to the backend to decide that). You
530 should `catch' the backend-specific error as usual. Some
531 backends (netrc, at least) will prompt the user rather than throw
534 :require (A B C) means that only results that contain those
535 tokens will be returned. Thus for instance requiring :secret
536 will ensure that any results will actually have a :secret
539 :delete t means to delete any found entries. nil by default.
540 Use `auth-source-delete' in ELisp code instead of calling
541 `auth-source-search' directly with this parameter.
543 :type (X Y Z) will check only those backend types. 'netrc and
544 'secrets are the only ones supported right now.
546 :max N means to try to return at most N items (defaults to 1).
547 When 0 the function will return just t or nil to indicate if any
548 matches were found. More than N items may be returned, depending
549 on the search and the backend.
551 :host (X Y Z) means to match only hosts X, Y, or Z according to
552 the match rules above. Defaults to t.
554 :user (X Y Z) means to match only users X, Y, or Z according to
555 the match rules above. Defaults to t.
557 :port (P Q R) means to match only protocols P, Q, or R.
560 :K (V1 V2 V3) for any other key K will match values V1, V2, or
561 V3 (note the match rules above).
563 The return value is a list with at most :max tokens. Each token
564 is a plist with keys :backend :host :port :user, plus any other
565 keys provided by the backend (notably :secret). But note the
566 exception for :max 0, which see above.
568 The token can hold a :save-function key. If you call that, the
569 user will be prompted to save the data to the backend. You can't
570 request that this should happen right after creation, because
571 `auth-source-search' has no way of knowing if the token is
572 actually useful. So the caller must arrange to call this function.
574 The token's :secret key can hold a function. In that case you
575 must call it to obtain the actual value."
576 (let* ((backends (mapcar 'auth-source-backend-parse auth-sources))
578 (ignored-keys '(:require :create :delete :max))
579 (keys (loop for i below (length spec) by 2
580 unless (memq (nth i spec) ignored-keys)
581 collect (nth i spec)))
582 (cached (auth-source-remembered-p spec))
583 ;; note that we may have cached results but found is still nil
584 ;; (there were no results from the search)
585 (found (auth-source-recall spec))
586 filtered-backends accessor-key backend)
588 (if (and cached auth-source-do-cache)
589 (auth-source-do-debug
590 "auth-source-search: found %d CACHED results matching %S"
594 (or (eq t create) (listp create)) t
595 "Invalid auth-source :create parameter (must be t or a list): %s %s")
599 "Invalid auth-source :require parameter (must be a list): %s")
601 (setq filtered-backends (copy-sequence backends))
602 (dolist (backend backends)
604 ;; ignore invalid slots
605 (condition-case signal
606 (unless (eval `(auth-source-search-collection
608 (oref backend ,key)))
609 (setq filtered-backends (delq backend filtered-backends))
611 (invalid-slot-name))))
613 (auth-source-do-trivia
614 "auth-source-search: found %d backends matching %S"
615 (length filtered-backends) spec)
617 ;; (debug spec "filtered" filtered-backends)
618 ;; First go through all the backends without :create, so we can
620 (setq found (auth-source-search-backends filtered-backends
624 ;; create is always nil here
628 (auth-source-do-debug
629 "auth-source-search: found %d results (max %d) matching %S"
630 (length found) max spec)
632 ;; If we didn't find anything, then we allow the backend(s) to
633 ;; create the entries.
636 (setq found (auth-source-search-backends filtered-backends
642 (auth-source-do-debug
643 "auth-source-search: CREATED %d results (max %d) matching %S"
644 (length found) max spec))
646 ;; note we remember the lack of result too, if it's applicable
647 (when auth-source-do-cache
648 (auth-source-remember spec found)))
652 (defun auth-source-search-backends (backends spec max create delete require)
654 (dolist (backend backends)
655 (when (> max (length matches)) ; when we need more matches...
656 (let* ((bmatches (apply
657 (slot-value backend 'search-function)
659 ;; note we're overriding whatever the spec
660 ;; has for :require, :create, and :delete
666 (auth-source-do-trivia
667 "auth-source-search-backend: got %d (max %d) in %s:%s matching %S"
668 (length bmatches) max
669 (slot-value backend :type)
670 (slot-value backend :source)
672 (setq matches (append matches bmatches))))))
675 ;;; (auth-source-search :max 1)
676 ;;; (funcall (plist-get (nth 0 (auth-source-search :max 1)) :secret))
677 ;;; (auth-source-search :host "nonesuch" :type 'netrc :K 1)
678 ;;; (auth-source-search :host "nonesuch" :type 'secrets)
680 (defun* auth-source-delete (&rest spec
683 "Delete entries from the authentication backends according to SPEC.
684 Calls `auth-source-search' with the :delete property in SPEC set to t.
685 The backend may not actually delete the entries.
687 Returns the deleted entries."
688 (auth-source-search (plist-put spec :delete t)))
690 (defun auth-source-search-collection (collection value)
691 "Returns t is VALUE is t or COLLECTION is t or contains VALUE."
692 (when (and (atom collection) (not (eq t collection)))
693 (setq collection (list collection)))
695 ;; (debug :collection collection :value value)
696 (or (eq collection t)
698 (equal collection value)
699 (member value collection)))
701 (defun auth-source-forget-all-cached ()
702 "Forget all cached auth-source data."
704 (loop for sym being the symbols of password-data
705 ;; when the symbol name starts with auth-source-magic
706 when (string-match (concat "^" auth-source-magic)
709 do (password-cache-remove (symbol-name sym))))
711 (defun auth-source-remember (spec found)
712 "Remember FOUND search results for SPEC."
713 (let ((password-cache-expiry auth-source-cache-expiry))
715 (concat auth-source-magic (format "%S" spec)) found)))
717 (defun auth-source-recall (spec)
718 "Recall FOUND search results for SPEC."
719 (password-read-from-cache
720 (concat auth-source-magic (format "%S" spec))))
722 (defun auth-source-remembered-p (spec)
723 "Check if SPEC is remembered."
725 (concat auth-source-magic (format "%S" spec))))
727 (defun auth-source-forget (spec)
728 "Forget any cached data matching SPEC exactly.
730 This is the same SPEC you passed to `auth-source-search'.
731 Returns t or nil for forgotten or not found."
732 (password-cache-remove (concat auth-source-magic (format "%S" spec))))
734 ;;; (loop for sym being the symbols of password-data when (string-match (concat "^" auth-source-magic) (symbol-name sym)) collect (symbol-name sym))
736 ;;; (auth-source-remember '(:host "wedd") '(4 5 6))
737 ;;; (auth-source-remembered-p '(:host "wedd"))
738 ;;; (auth-source-remember '(:host "xedd") '(1 2 3))
739 ;;; (auth-source-remembered-p '(:host "xedd"))
740 ;;; (auth-source-remembered-p '(:host "zedd"))
741 ;;; (auth-source-recall '(:host "xedd"))
742 ;;; (auth-source-recall '(:host t))
743 ;;; (auth-source-forget+ :host t)
745 (defun* auth-source-forget+ (&rest spec &allow-other-keys)
746 "Forget any cached data matching SPEC. Returns forgotten count.
748 This is not a full `auth-source-search' spec but works similarly.
749 For instance, \(:host \"myhost\" \"yourhost\") would find all the
750 cached data that was found with a search for those two hosts,
751 while \(:host t) would find all host entries."
754 (loop for sym being the symbols of password-data
755 ;; when the symbol name matches with auth-source-magic
756 when (and (setq sname (symbol-name sym))
757 (string-match (concat "^" auth-source-magic "\\(.+\\)")
759 ;; and the spec matches what was stored in the cache
760 (auth-source-specmatchp spec (read (match-string 1 sname))))
763 (password-cache-remove sname)
767 (defun auth-source-specmatchp (spec stored)
768 (let ((keys (loop for i below (length spec) by 2
769 collect (nth i spec))))
772 (unless (auth-source-search-collection (plist-get stored key)
773 (plist-get spec key))
777 ;;; (auth-source-pick-first-password :host "z.lifelogs.com")
778 ;;; (auth-source-pick-first-password :port "imap")
779 (defun auth-source-pick-first-password (&rest spec)
780 "Pick the first secret found from applying SPEC to `auth-source-search'."
781 (let* ((result (nth 0 (apply 'auth-source-search (plist-put spec :max 1))))
782 (secret (plist-get result :secret)))
784 (if (functionp secret)
788 ;; (auth-source-format-prompt "test %u %h %p" '((?u "user") (?h "host")))
789 (defun auth-source-format-prompt (prompt alist)
790 "Format PROMPT using %x (for any character x) specifiers in ALIST."
792 (let ((c (nth 0 cell))
795 (setq prompt (replace-regexp-in-string (format "%%%c" c)
800 (defun auth-source-ensure-strings (values)
801 (unless (listp values)
802 (setq values (list values)))
803 (mapcar (lambda (value)
809 ;;; Backend specific parsing: netrc/authinfo backend
811 (defvar auth-source-netrc-cache nil)
813 ;;; (auth-source-netrc-parse "~/.authinfo.gpg")
814 (defun* auth-source-netrc-parse (&rest
816 &key file max host user port delete require
818 "Parse FILE and return a list of all entries in the file.
819 Note that the MAX parameter is used so we can exit the parse early."
821 ;; We got already parsed contents; just return it.
823 (when (file-exists-p file)
824 (setq port (auth-source-ensure-strings port))
826 (let* ((tokens '("machine" "host" "default" "login" "user"
827 "password" "account" "macdef" "force"
829 (max (or max 5000)) ; sanity check: default to stop at 5K
831 (cached (cdr-safe (assoc file auth-source-netrc-cache)))
832 (cached-mtime (plist-get cached :mtime))
833 (cached-secrets (plist-get cached :secret))
834 alist elem result pair)
836 (if (and (functionp cached-secrets)
838 (nth 5 (file-attributes file))))
840 (auth-source-do-trivia
841 "auth-source-netrc-parse: using CACHED file data for %s"
843 (insert (funcall cached-secrets)))
844 (insert-file-contents file)
845 ;; cache all netrc files (used to be just .gpg files)
846 ;; Store the contents of the file heavily encrypted in memory.
847 ;; (note for the irony-impaired: they are just obfuscated)
848 (aput 'auth-source-netrc-cache file
849 (list :mtime (nth 5 (file-attributes file))
850 :secret (lexical-let ((v (rot13-string
851 (base64-encode-string
853 (lambda () (base64-decode-string
854 (rot13-string v)))))))
855 (goto-char (point-min))
856 ;; Go through the file, line by line.
857 (while (and (not (eobp))
860 (narrow-to-region (point) (point-at-eol))
861 ;; For each line, get the tokens and values.
863 (skip-chars-forward "\t ")
864 ;; Skip lines that begin with a "#".
865 (if (eq (char-after) ?#)
866 (goto-char (point-max))
869 (if (= (following-char) ?\")
870 (read (current-buffer))
872 (point) (progn (skip-chars-forward "^\t ")
875 ((equal elem "macdef")
876 ;; We skip past the macro definition.
878 (while (and (zerop (forward-line 1))
880 (narrow-to-region (point) (point)))
881 ((member elem tokens)
882 ;; Tokens that don't have a following value are ignored,
884 (when (and pair (or (cdr pair)
885 (equal (car pair) "default")))
887 (setq pair (list elem)))
889 ;; Values that haven't got a preceding token are ignored.
893 (setq pair nil)))))))
897 (auth-source-search-collection
900 (aget alist "machine")
903 (auth-source-search-collection
907 (aget alist "account")
910 (auth-source-search-collection
914 (aget alist "protocol")
917 ;; the required list of keys is nil, or
919 ;; every element of require is in the normalized list
920 (let ((normalized (nth 0 (auth-source-netrc-normalize
921 (list alist) file))))
922 (loop for req in require
923 always (plist-get normalized req)))))
925 (push (nreverse alist) result)
926 ;; to delete a line, we just comment it out
928 (goto-char (point-min))
937 (when auth-source-gpg-encrypt-to
938 ;; (see bug#7487) making `epa-file-encrypt-to' local to
939 ;; this buffer lets epa-file skip the key selection query
940 ;; (see the `local-variable-p' check in
941 ;; `epa-file-write-region').
942 (unless (local-variable-p 'epa-file-encrypt-to (current-buffer))
943 (make-local-variable 'epa-file-encrypt-to))
944 (if (listp auth-source-gpg-encrypt-to)
945 (setq epa-file-encrypt-to auth-source-gpg-encrypt-to)))
947 ;; ask AFTER we've successfully opened the file
948 (when (y-or-n-p (format "Save file %s? (%d deletions)"
950 (write-region (point-min) (point-max) file nil 'silent)
951 (auth-source-do-debug
952 "auth-source-netrc-parse: modified %d lines in %s"
955 (nreverse result))))))
957 (defmacro with-auth-source-epa-overrides (&rest body)
958 `(let ((file-name-handler-alist
959 ',(remove epa-file-handler file-name-handler-alist))
961 ',(remove 'epa-file-find-file-hook find-file-hook))
963 ',(remove epa-file-auto-mode-alist-entry auto-mode-alist)))
966 (defun auth-source-epa-make-gpg-token (secret file)
968 (unless (featurep 'epa)
969 (error "EPA could not be loaded."))
970 (let* ((base (file-name-sans-extension file))
971 (passkey (format "gpg:-%s" base))
972 (stash (concat base ".gpg"))
973 ;; temporarily disable EPA
975 (with-auth-source-epa-overrides
976 (make-temp-file "gpg-token" nil
978 (epa-file-passphrase-alist
982 "token pass for %s? "
985 (write-region secret nil stashfile)
986 ;; temporarily disable EPA
988 (with-auth-source-epa-overrides
990 (insert-file-contents stashfile)
991 (base64-encode-region (point-min) (point-max) t)
993 (buffer-substring-no-properties
996 (delete-file stashfile))))
998 (defun auth-source-netrc-normalize (alist filename)
999 (mapcar (lambda (entry)
1001 (while (setq item (pop entry))
1002 (let ((k (car item))
1005 ;; apply key aliases
1006 (setq k (cond ((member k '("machine")) "host")
1007 ((member k '("login" "account")) "user")
1008 ((member k '("protocol")) "port")
1009 ((member k '("password")) "secret")
1012 ;; send back the secret in a function (lexical binding)
1013 (when (equal k "secret")
1014 (setq v (lexical-let ((v v)
1016 (base (file-name-nondirectory
1021 (setq stash (concat base ".gpg"))
1022 (when (string-match "gpg:\\(.+\\)" v)
1023 (require 'epa nil t)
1024 (unless (featurep 'epa)
1025 (error "EPA could not be loaded."))
1026 (setq gpgdata (base64-decode-string
1027 (match-string 1 v)))
1032 ;;; FIXME: this relies on .gpg files being handled by EPA/EPG
1033 (let* ((passkey (format "gpg:-%s" base))
1034 ;; temporarily disable EPA
1036 (with-auth-source-epa-overrides
1037 (make-temp-file "gpg-token" nil
1039 (epa-file-passphrase-alist
1043 "token pass for %s? "
1048 ;; temporarily disable EPA
1049 (with-auth-source-epa-overrides
1050 (write-region gpgdata
1056 (insert-file-contents stashfile)
1057 (buffer-substring-no-properties
1060 (delete-file stashfile)))
1061 ;; clear out the decoder at end
1062 (setq token-decoder nil
1066 (funcall token-decoder gpgdata))
1068 (setq ret (plist-put ret
1069 (intern (concat ":" k))
1074 ;;; (setq secret (plist-get (nth 0 (auth-source-search :host t :type 'netrc :K 1 :max 1)) :secret))
1075 ;;; (funcall secret)
1077 (defun* auth-source-netrc-search (&rest
1079 &key backend require create delete
1080 type max host user port
1082 "Given a property list SPEC, return search matches from the :backend.
1083 See `auth-source-search' for details on SPEC."
1084 ;; just in case, check that the type is correct (null or same as the backend)
1085 (assert (or (null type) (eq type (oref backend type)))
1086 t "Invalid netrc search: %s %s")
1088 (let ((results (auth-source-netrc-normalize
1089 (auth-source-netrc-parse
1093 :file (oref backend source)
1097 (oref backend source))))
1099 ;; if we need to create an entry AND none were found to match
1103 ;; create based on the spec and record the value
1105 ;; if the user did not want to create the entry
1106 ;; in the file, it will be returned
1107 (apply (slot-value backend 'create-function) spec)
1108 ;; if not, we do the search again without :create
1109 ;; to get the updated data.
1111 ;; the result will be returned, even if the search fails
1112 (apply 'auth-source-netrc-search
1113 (plist-put spec :create nil)))))
1116 (defun auth-source-netrc-element-or-first (v)
1121 ;;; (auth-source-search :host "nonesuch" :type 'netrc :max 1 :create t)
1122 ;;; (auth-source-search :host "nonesuch" :type 'netrc :max 1 :create t :create-extra-keys '((A "default A") (B)))
1124 (defun* auth-source-netrc-create (&rest spec
1126 secret host user port create
1128 (let* ((base-required '(host user port secret))
1129 ;; we know (because of an assertion in auth-source-search) that the
1130 ;; :create parameter is either t or a list (which includes nil)
1131 (create-extra (if (eq t create) nil create))
1132 (required (append base-required create-extra))
1133 (file (oref backend source))
1135 ;; `valist' is an alist
1137 ;; `artificial' will be returned if no creation is needed
1140 ;; only for base required elements (defined as function parameters):
1141 ;; fill in the valist with whatever data we may have from the search
1142 ;; we complete the first value if it's a list and use the value otherwise
1143 (dolist (br base-required)
1144 (when (symbol-value br)
1145 (let ((br-choice (cond
1146 ;; all-accepting choice (predicate is t)
1147 ((eq t (symbol-value br)) nil)
1148 ;; just the value otherwise
1149 (t (symbol-value br)))))
1151 (aput 'valist br br-choice)))))
1153 ;; for extra required elements, see if the spec includes a value for them
1154 (dolist (er create-extra)
1155 (let ((name (concat ":" (symbol-name er)))
1156 (keys (loop for i below (length spec) by 2
1157 collect (nth i spec))))
1159 (when (equal (symbol-name k) name)
1160 (aput 'valist er (plist-get spec k))))))
1162 ;; for each required element
1163 (dolist (r required)
1164 (let* ((data (aget valist r))
1165 ;; take the first element if the data is a list
1166 (data (auth-source-netrc-element-or-first data))
1167 ;; this is the default to be offered
1168 (given-default (aget auth-source-creation-defaults r))
1169 ;; the default supplementals are simple:
1170 ;; for the user, try `given-default' and then (user-login-name);
1171 ;; otherwise take `given-default'
1173 ((and (not given-default) (eq r 'user))
1176 (printable-defaults (list
1179 (auth-source-netrc-element-or-first
1180 (aget valist 'user))
1181 (plist-get artificial :user)
1185 (auth-source-netrc-element-or-first
1186 (aget valist 'host))
1187 (plist-get artificial :host)
1191 (auth-source-netrc-element-or-first
1192 (aget valist 'port))
1193 (plist-get artificial :port)
1195 (prompt (or (aget auth-source-creation-prompts r)
1197 (secret "%p password for %u@%h: ")
1198 (user "%p user name for %h: ")
1199 (host "%p host name for user %u: ")
1200 (port "%p port for %u@%h: "))
1201 (format "Enter %s (%%u@%%h:%%p): " r)))
1202 (prompt (auth-source-format-prompt
1204 `((?u ,(aget printable-defaults 'user))
1205 (?h ,(aget printable-defaults 'host))
1206 (?p ,(aget printable-defaults 'port))))))
1208 ;; Store the data, prompting for the password if needed.
1211 ((and (null data) (eq r 'secret))
1212 ;; Special case prompt for passwords.
1213 ;; Respect `auth-source-save-secrets'
1214 (let* ((ep (format "Do you want GPG password tokens? (%s)"
1215 "see `auth-source-save-secrets'"))
1217 ;;; FIXME: this relies on .gpg files being handled by EPA/EPG
1218 ;; don't put GPG tokens in GPG-encrypted files
1219 (and (not (equal "gpg" (file-name-extension file)))
1220 (or (eq auth-source-save-secrets 'gpg)
1221 (and (eq auth-source-save-secrets 'ask)
1222 (setq auth-source-save-secrets
1223 (and (y-or-n-p ep) 'gpg))))))
1224 (plain (read-passwd prompt)))
1225 (if (eq auth-source-save-secrets 'gpg)
1226 (auth-source-epa-make-gpg-token plain file)
1231 (if (string-match ": *\\'" prompt)
1232 (concat (substring prompt 0 (match-beginning 0))
1233 " (default " default "): ")
1234 (concat prompt "(default " default ") "))))
1235 (read-string prompt nil nil default))
1236 (t (or data default))))
1239 (setq artificial (plist-put artificial
1240 (intern (concat ":" (symbol-name r)))
1242 (lexical-let ((data data))
1246 ;; When r is not an empty string...
1247 (when (and (stringp data)
1248 (< 0 (length data)))
1249 ;; this function is not strictly necessary but I think it
1250 ;; makes the code clearer -tzz
1251 (let ((printer (lambda ()
1252 ;; append the key (the symbol name of r)
1253 ;; and the value in r
1256 (if (zerop (length add)) "" " ")
1257 ;; remap auth-source tokens to netrc
1262 (port "port") ; redundant but clearer
1263 (t (symbol-name r)))
1264 ;; the value will be printed in %S format
1266 (setq add (concat add (funcall printer)))))))
1271 (lexical-let ((file file)
1273 (lambda () (auth-source-netrc-saver file add))))
1277 ;;(funcall (plist-get (nth 0 (auth-source-search :host '("nonesuch2") :user "tzz" :port "imap" :create t :max 1)) :save-function))
1278 (defun auth-source-netrc-saver (file add)
1279 "Save a line ADD in FILE, prompting along the way.
1280 Respects `auth-source-save-behavior'. Uses
1281 `auth-source-netrc-cache' to avoid prompting more than once."
1282 (let* ((key (format "%s %s" file (rfc2104-hash 'md5 64 16 file add)))
1283 (cached (assoc key auth-source-netrc-cache)))
1286 (auth-source-do-trivia
1287 "auth-source-netrc-saver: found previous run for key %s, returning"
1290 (when (file-exists-p file)
1291 (insert-file-contents file))
1292 (when auth-source-gpg-encrypt-to
1293 ;; (see bug#7487) making `epa-file-encrypt-to' local to
1294 ;; this buffer lets epa-file skip the key selection query
1295 ;; (see the `local-variable-p' check in
1296 ;; `epa-file-write-region').
1297 (unless (local-variable-p 'epa-file-encrypt-to (current-buffer))
1298 (make-local-variable 'epa-file-encrypt-to))
1299 (if (listp auth-source-gpg-encrypt-to)
1300 (setq epa-file-encrypt-to auth-source-gpg-encrypt-to)))
1301 ;; we want the new data to be found first, so insert at beginning
1302 (goto-char (point-min))
1304 ;; Ask AFTER we've successfully opened the file.
1305 (let ((prompt (format "Save auth info to file %s? " file))
1306 (done (not (eq auth-source-save-behavior 'ask)))
1307 (bufname "*auth-source Help*")
1310 (setq k (auth-source-read-char-choice prompt '(?y ?n ?N ?e ??)))
1314 (with-output-to-temp-buffer bufname
1316 (concat "(y)es, save\n"
1317 "(n)o but use the info\n"
1318 "(N)o and don't ask to save again\n"
1320 "(?) for help as you can see.\n"))
1321 ;; Why? Doesn't with-output-to-temp-buffer already do
1322 ;; the exact same thing anyway? --Stef
1323 (set-buffer standard-output)
1329 auth-source-save-behavior nil))
1330 (?e (setq add (read-string "Line to add: " add)))
1333 (when (get-buffer-window bufname)
1334 (delete-window (get-buffer-window bufname)))
1336 ;; Make sure the info is not saved.
1337 (when (null auth-source-save-behavior)
1340 (when (< 0 (length add))
1345 (write-region (point-min) (point-max) file nil 'silent)
1346 (auth-source-do-debug
1347 "auth-source-netrc-create: wrote 1 new line to %s"
1349 (message "Saved new authentication information to %s" file)
1351 (aput 'auth-source-netrc-cache key "ran"))))
1353 ;;; Backend specific parsing: Secrets API backend
1355 ;;; (let ((auth-sources '(default))) (auth-source-search :max 1 :create t))
1356 ;;; (let ((auth-sources '(default))) (auth-source-search :max 1 :delete t))
1357 ;;; (let ((auth-sources '(default))) (auth-source-search :max 1))
1358 ;;; (let ((auth-sources '(default))) (auth-source-search))
1359 ;;; (let ((auth-sources '("secrets:Login"))) (auth-source-search :max 1))
1360 ;;; (let ((auth-sources '("secrets:Login"))) (auth-source-search :max 1 :signon_realm "https://git.gnus.org/Git"))
1362 (defun* auth-source-secrets-search (&rest
1364 &key backend create delete label
1365 type max host user port
1367 "Search the Secrets API; spec is like `auth-source'.
1369 The :label key specifies the item's label. It is the only key
1370 that can specify a substring. Any :label value besides a string
1371 will allow any label.
1373 All other search keys must match exactly. If you need substring
1374 matching, do a wider search and narrow it down yourself.
1376 You'll get back all the properties of the token as a plist.
1378 Here's an example that looks for the first item in the 'Login'
1381 \(let ((auth-sources '(\"secrets:Login\")))
1382 (auth-source-search :max 1)
1384 Here's another that looks for the first item in the 'Login'
1385 Secrets collection whose label contains 'gnus':
1387 \(let ((auth-sources '(\"secrets:Login\")))
1388 (auth-source-search :max 1 :label \"gnus\")
1390 And this one looks for the first item in the 'Login' Secrets
1391 collection that's a Google Chrome entry for the git.gnus.org site
1392 authentication tokens:
1394 \(let ((auth-sources '(\"secrets:Login\")))
1395 (auth-source-search :max 1 :signon_realm \"https://git.gnus.org/Git\"))
1399 (assert (not create) nil
1400 "The Secrets API auth-source backend doesn't support creation yet")
1402 ;; (secrets-delete-item coll elt)
1403 (assert (not delete) nil
1404 "The Secrets API auth-source backend doesn't support deletion yet")
1406 (let* ((coll (oref backend source))
1407 (max (or max 5000)) ; sanity check: default to stop at 5K
1408 (ignored-keys '(:create :delete :max :backend :label))
1409 (search-keys (loop for i below (length spec) by 2
1410 unless (memq (nth i spec) ignored-keys)
1411 collect (nth i spec)))
1412 ;; build a search spec without the ignored keys
1413 ;; if a search key is nil or t (match anything), we skip it
1414 (search-spec (apply 'append (mapcar
1416 (if (or (null (plist-get spec k))
1417 (eq t (plist-get spec k)))
1419 (list k (plist-get spec k))))
1421 ;; needed keys (always including host, login, port, and secret)
1422 (returned-keys (mm-delete-duplicates (append
1423 '(:host :login :port :secret)
1425 (items (loop for item in (apply 'secrets-search-items coll search-spec)
1426 unless (and (stringp label)
1427 (not (string-match label item)))
1429 ;; TODO: respect max in `secrets-search-items', not after the fact
1430 (items (butlast items (- (length items) max)))
1431 ;; convert the item name to a full plist
1432 (items (mapcar (lambda (item)
1434 ;; make an entry for the secret (password) element
1437 (lexical-let ((v (secrets-get-secret coll item)))
1439 ;; rewrite the entry from ((k1 v1) (k2 v2)) to plist
1441 (mapcar (lambda (entry)
1442 (list (car entry) (cdr entry)))
1443 (secrets-get-attributes coll item)))))
1445 ;; ensure each item has each key in `returned-keys'
1446 (items (mapcar (lambda (plist)
1449 (mapcar (lambda (req)
1450 (if (plist-get plist req)
1458 (defun* auth-source-secrets-create (&rest
1460 &key backend type max host user port
1463 ;; (apply 'secrets-create-item (auth-get-source entry) name passwd spec)
1468 ;;; (auth-source-user-or-password '("login" "password") "imap.myhost.com" t "tzz")
1470 ;; deprecate the old interface
1471 (make-obsolete 'auth-source-user-or-password
1472 'auth-source-search "Emacs 24.1")
1473 (make-obsolete 'auth-source-forget-user-or-password
1474 'auth-source-forget "Emacs 24.1")
1476 (defun auth-source-user-or-password
1477 (mode host port &optional username create-missing delete-existing)
1478 "Find MODE (string or list of strings) matching HOST and PORT.
1480 DEPRECATED in favor of `auth-source-search'!
1482 USERNAME is optional and will be used as \"login\" in a search
1483 across the Secret Service API (see secrets.el) if the resulting
1484 items don't have a username. This means that if you search for
1485 username \"joe\" and it matches an item but the item doesn't have
1486 a :user attribute, the username \"joe\" will be returned.
1488 A non nil DELETE-EXISTING means deleting any matching password
1489 entry in the respective sources. This is useful only when
1490 CREATE-MISSING is non nil as well; the intended use case is to
1491 remove wrong password entries.
1493 If no matching entry is found, and CREATE-MISSING is non nil,
1494 the password will be retrieved interactively, and it will be
1495 stored in the password database which matches best (see
1498 MODE can be \"login\" or \"password\"."
1499 (auth-source-do-debug
1500 "auth-source-user-or-password: DEPRECATED get %s for %s (%s) + user=%s"
1501 mode host port username)
1503 (let* ((listy (listp mode))
1504 (mode (if listy mode (list mode)))
1506 (format "%s %s:%s %s" mode host port username)
1507 (format "%s %s:%s" mode host port)))
1508 (search (list :host host :port port))
1509 (search (if username (append search (list :user username)) search))
1510 (search (if create-missing
1511 (append search (list :create t))
1513 (search (if delete-existing
1514 (append search (list :delete t))
1516 ;; (found (if (not delete-existing)
1517 ;; (gethash cname auth-source-cache)
1518 ;; (remhash cname auth-source-cache)
1523 (auth-source-do-debug
1524 "auth-source-user-or-password: DEPRECATED cached %s=%s for %s (%s) + %s"
1526 ;; don't show the password
1527 (if (and (member "password" mode) t)
1531 found) ; return the found data
1532 ;; else, if not found, search with a max of 1
1533 (let ((choice (nth 0 (apply 'auth-source-search
1534 (append '(:max 1) search)))))
1538 ((equal "password" m)
1539 (push (if (plist-get choice :secret)
1540 (funcall (plist-get choice :secret))
1543 (push (plist-get choice :user) found)))))
1544 (setq found (nreverse found))
1545 (setq found (if listy found (car-safe found)))))
1549 (provide 'auth-source)
1551 ;;; auth-source.el ends here