bc511a64f6
Most of this change is to boilerplate commentary such as license URLs. This change was prompted by ftp://ftp.gnu.org's going-away party, planned for November. Change these FTP URLs to https://ftp.gnu.org instead. Make similar changes for URLs to other organizations moving away from FTP. Also, change HTTP to HTTPS for URLs to gnu.org and fsf.org when this works, as this will further help defend against man-in-the-middle attacks (for this part I omitted the MS-DOS and MS-Windows sources and the test tarballs to keep the workload down). HTTPS is not fully working to lists.gnu.org so I left those URLs alone for now.
240 lines
7.9 KiB
EmacsLisp
240 lines
7.9 KiB
EmacsLisp
;;; url-ldap.el --- LDAP Uniform Resource Locator retrieval code
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;; Copyright (C) 1998-1999, 2004-2017 Free Software Foundation, Inc.
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;; Keywords: comm, data, processes
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;; This file is part of GNU Emacs.
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;;
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; Code:
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(require 'url-vars)
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(require 'url-parse)
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(require 'url-util)
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(require 'ldap)
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(autoload 'tls-certificate-information "tls")
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;; This has been implemented from RFC2255 'The LDAP URL Format' (Dec 1997)
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;;
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;; basic format is: ldap://host:port/dn?attributes?scope?filter?extensions
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;;
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;; Test URLs:
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;; ldap://ldap.itd.umich.edu/cn%3Dumbflabmanager%2C%20ou%3DUser%20Groups%2C%20ou%3DGroups%2C%20o%3DUniversity%20of%20Michigan%2C%20c%3DUS
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;; ldap://ldap.itd.umich.edu/o=University%20of%20Michigan,c=US
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;;
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;; For simple queries, I have verified compatibility with Netscape
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;; Communicator v4.5 under GNU/Linux.
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;;
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;; For anything _useful_ though, like specifying the attributes,
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;; scope, filter, or extensions, netscape claims the URL format is
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;; unrecognized. So I don't think it supports anything other than the
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;; defaults (scope=base,attributes=*,filter=(objectClass=*)
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(defconst url-ldap-default-port 389 "Default LDAP port.")
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(defalias 'url-ldap-expand-file-name 'url-default-expander)
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(defvar url-ldap-pretty-names
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'(("l" . "City")
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("objectclass" . "Object Class")
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("o" . "Organization")
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("ou" . "Organizational Unit")
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("cn" . "Name")
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("sn" . "Last Name")
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("givenname" . "First Name")
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("mail" . "Email")
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("title" . "Title")
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("c" . "Country")
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("postalcode" . "ZIP Code")
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("telephonenumber" . "Phone Number")
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("facsimiletelephonenumber" . "Fax")
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("postaladdress" . "Mailing Address")
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("description" . "Notes"))
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"An assoc list mapping LDAP attribute names to pretty descriptions of them.")
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(defvar url-ldap-attribute-formatters
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'(("mail" . (lambda (x) (format "<a href='mailto:%s'>%s</a>" x x)))
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("owner" . url-ldap-dn-formatter)
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("creatorsname" . url-ldap-dn-formatter)
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("jpegphoto" . url-ldap-image-formatter)
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("usercertificate" . url-ldap-certificate-formatter)
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("modifiersname" . url-ldap-dn-formatter)
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("namingcontexts" . url-ldap-dn-formatter)
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("defaultnamingcontext" . url-ldap-dn-formatter)
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("member" . url-ldap-dn-formatter))
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"An assoc list mapping LDAP attribute names to pretty formatters for them.")
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(defsubst url-ldap-attribute-pretty-name (n)
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(or (cdr-safe (assoc (downcase n) url-ldap-pretty-names)) n))
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(defsubst url-ldap-attribute-pretty-desc (n v)
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(if (string-match "^\\([^;]+\\);" n)
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(setq n (match-string 1 n)))
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(funcall (or (cdr-safe (assoc (downcase n) url-ldap-attribute-formatters)) 'identity) v))
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(defun url-ldap-dn-formatter (dn)
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(concat "<a href='/"
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(url-hexify-string dn)
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"'>" dn "</a>"))
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(defun url-ldap-certificate-formatter (data)
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(condition-case ()
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(require 'ssl)
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(error nil))
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(let ((vals (if (fboundp 'ssl-certificate-information)
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(ssl-certificate-information data)
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(tls-certificate-information data))))
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(if (not vals)
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"<b>Unable to parse certificate</b>"
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(concat "<table border=0>\n"
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(mapconcat
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(lambda (ava)
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(format "<tr><td>%s</td><td>%s</td></tr>\n" (car ava) (cdr ava)))
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vals "\n")
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"</table>\n"))))
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(defun url-ldap-image-formatter (data)
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(format "<img alt='JPEG Photo' src='data:image/jpeg;base64,%s'>"
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(url-hexify-string (base64-encode-string data))))
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;;;###autoload
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(defun url-ldap (url)
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"Perform an LDAP search specified by URL.
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The return value is a buffer displaying the search results in HTML.
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URL can be a URL string, or a URL record of the type returned by
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`url-generic-parse-url'."
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(if (stringp url)
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(setq url (url-generic-parse-url (url-unhex-string url)))
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(if (not (url-p url))
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(error "Argument is not a valid URL")))
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(with-current-buffer (generate-new-buffer " *url-ldap*")
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(setq url-current-object url)
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(insert "Content-type: text/html\r\n\r\n")
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(if (not (fboundp 'ldap-search-internal))
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(insert "<html>\n"
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" <head>\n"
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" <title>LDAP Not Supported</title>\n"
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" <base href='" (url-recreate-url url) "'>\n"
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" </head>\n"
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" <body>\n"
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" <h1>LDAP Not Supported</h1>\n"
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" <p>\n"
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" This version of Emacs does not support LDAP.\n"
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" </p>\n"
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" </body>\n"
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"</html>\n")
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(let* ((binddn nil)
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(data (url-filename url))
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(host (url-host url))
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(port (url-port url))
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(base-object nil)
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(attributes nil)
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(scope nil)
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(filter nil)
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(extensions nil)
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(results nil))
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;; Get rid of leading /
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(if (string-match "^/" data)
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(setq data (substring data 1)))
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(setq data (mapcar (lambda (x) (if (/= (length x) 0) x nil)) (split-string data "\\?"))
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base-object (nth 0 data)
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attributes (nth 1 data)
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scope (nth 2 data)
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filter (nth 3 data)
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extensions (nth 4 data))
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;; fill in the defaults
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(setq base-object (url-unhex-string (or base-object ""))
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scope (intern (url-unhex-string (or scope "base")))
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filter (url-unhex-string (or filter "(objectClass=*)")))
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(if (not (memq scope '(base one sub)))
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(error "Malformed LDAP URL: Unknown scope: %S" scope))
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;; Convert to the internal LDAP support scoping names.
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(setq scope (cdr (assq scope '((base . base) (one . onelevel) (sub . subtree)))))
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(if attributes
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(setq attributes (mapcar 'url-unhex-string (split-string attributes ","))))
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;; Parse out the extensions.
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(if extensions
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(setq extensions (mapcar (lambda (ext)
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(if (string-match "\\([^=]*\\)=\\(.*\\)" ext)
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(cons (match-string 1 ext) (match-string 2 ext))
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(cons ext ext)))
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(split-string extensions ","))
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extensions (mapcar (lambda (ext)
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(cons (url-unhex-string (car ext))
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(url-unhex-string (cdr ext))))
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extensions)))
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(setq binddn (cdr-safe (or (assoc "bindname" extensions)
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(assoc "!bindname" extensions))))
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;; Now, let's actually do something with it.
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(setq results (cdr (ldap-search-internal
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(list 'host (concat host ":" (number-to-string port))
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'base base-object
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'attributes attributes
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'scope scope
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'filter filter
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'binddn binddn))))
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(insert "<html>\n"
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" <head>\n"
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" <title>LDAP Search Results</title>\n"
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" <base href='" (url-recreate-url url) "'>\n"
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" </head>\n"
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" <body>\n"
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" <h1>" (int-to-string (length results)) " matches</h1>\n")
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(mapc (lambda (obj)
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(insert " <hr>\n"
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" <table border=1>\n")
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(mapc (lambda (attr)
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(if (= (length (cdr attr)) 1)
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;; single match, easy
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(insert " <tr><td>"
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(url-ldap-attribute-pretty-name (car attr))
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"</td><td>"
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(url-ldap-attribute-pretty-desc (car attr) (car (cdr attr)))
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"</td></tr>\n")
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;; Multiple matches, slightly uglier
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(insert " <tr>\n"
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(format " <td valign=top>")
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(url-ldap-attribute-pretty-name (car attr)) "</td><td>"
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(mapconcat (lambda (x)
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(url-ldap-attribute-pretty-desc (car attr) x))
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(cdr attr)
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"<br>\n")
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"</td>"
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" </tr>\n")))
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obj)
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(insert " </table>\n"))
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results)
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(insert " <hr>\n"
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" </body>\n"
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"</html>\n")))
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(current-buffer)))
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(provide 'url-ldap)
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;;; url-ldap.el ends here
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