From af0825b4916899794768e8bd120c6bcc2d49e5f2 Mon Sep 17 00:00:00 2001 From: Simon Josefsson Date: Mon, 5 Jan 2004 01:09:06 +0000 Subject: [PATCH] sasl-ntlm.el, ntlm.el, md4.el: New files. --- lisp/ChangeLog | 2 + lisp/md4.el | 237 +++++++++++++++++++++ lisp/ntlm.el | 530 ++++++++++++++++++++++++++++++++++++++++++++++ lisp/sasl-ntlm.el | 65 ++++++ 4 files changed, 834 insertions(+) create mode 100644 lisp/md4.el create mode 100644 lisp/ntlm.el create mode 100644 lisp/sasl-ntlm.el diff --git a/lisp/ChangeLog b/lisp/ChangeLog index a8563b230..ca8251a75 100644 --- a/lisp/ChangeLog +++ b/lisp/ChangeLog @@ -1,5 +1,7 @@ 2004-01-05 Simon Josefsson + * sasl-ntlm.el, ntlm.el, md4.el: New files. + * hmac-md5.el (md5-binary): Fix byte compile warning. (This probably breaks emacs with DL patch, but do we care? Is anyone still using the DL stuff?) diff --git a/lisp/md4.el b/lisp/md4.el new file mode 100644 index 000000000..42cc7ab9e --- /dev/null +++ b/lisp/md4.el @@ -0,0 +1,237 @@ +;;; md4.el --- MD4 Message Digest Algorithm. + +;; Copyright (C) 2001 Taro Kawagishi +;; Author: Taro Kawagishi +;; Keywords: MD4 +;; Version: 1.00 +;; Created: February 2001 + +;; This file is part of FLIM (Faithful Library about Internet Message). + +;; This program 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 2, or (at your option) +;; any later version. +;; +;; This program 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 this program; see the file COPYING. If not, write to the +;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, +;; Boston, MA 02111-1307, USA. + +;;; Code: + +;;; +;;; MD4 hash calculation + +(defun print-int32 (int32) + "print 32 bits integer in 4 bytes string as little endian" + (let ((h (car int32)) (l (cdr int32))) + (list (logand l 255) (lsh l -8) (logand h 255) (lsh h -8)))) + +(defun print-string-hexa (str) + "print a string in hexadecimal" + (let (out) + (mapcar (function (lambda (x) (concat out (format "%x" x)))) str))) + +(defvar md4-buffer (make-vector 4 '(0 . 0)) + "work buffer of four 32-bit integers") + +(defun md4 (in n) + "Returns the MD4 hash string of 16 bytes long for a string IN of N +bytes long. N is required to handle strings containing character 0." + (let (m + (b (cons 0 (* n 8))) + (i 0) + (buf (make-string 128 0)) c4) + ;; initial values + (aset md4-buffer 0 '(26437 . 8961)) ;0x67452301 + (aset md4-buffer 1 '(61389 . 43913)) ;0xefcdab89 + (aset md4-buffer 2 '(39098 . 56574)) ;0x98badcfe + (aset md4-buffer 3 '(4146 . 21622)) ;0x10325476 + + ;; process the string in 64 bits chunks + (while (> n 64) + (setq m (md4-copy64 (substring in 0 64))) + (md4-64 m) + (setq in (substring in 64)) + (setq n (- n 64))) + + ;; process the rest of the string (length is now n <= 64) + (setq i 0) + (while (< i n) + (aset buf i (aref in i)) + (setq i (1+ i))) + (aset buf n 128) ;0x80 + (if (<= n 55) + (progn + (setq c4 (md4-pack-int32 b)) + (aset buf 56 (aref c4 0)) + (aset buf 57 (aref c4 1)) + (aset buf 58 (aref c4 2)) + (aset buf 59 (aref c4 3)) + (setq m (md4-copy64 buf)) + (md4-64 m)) + ;; else + (setq c4 (md4-pack-int32 b)) + (aset buf 120 (aref c4 0)) + (aset buf 121 (aref c4 1)) + (aset buf 122 (aref c4 2)) + (aset buf 123 (aref c4 3)) + (setq m (md4-copy64 buf)) + (md4-64 m) + (setq m (md4-copy64 (substring buf 64))) + (md4-64 m))) + + (concat (md4-pack-int32 (aref md4-buffer 0)) + (md4-pack-int32 (aref md4-buffer 1)) + (md4-pack-int32 (aref md4-buffer 2)) + (md4-pack-int32 (aref md4-buffer 3)))) + +(defsubst md4-F (x y z) (logior (logand x y) (logand (lognot x) z))) +(defsubst md4-G (x y z) (logior (logand x y) (logand x z) (logand y z))) +(defsubst md4-H (x y z) (logxor x y z)) + +(defmacro md4-make-step (name func) + (` + (defun (, name) (a b c d xk s ac) + (let* + ((h1 (+ (car a) ((, func) (car b) (car c) (car d)) (car xk) (car ac))) + (l1 (+ (cdr a) ((, func) (cdr b) (cdr c) (cdr d)) (cdr xk) (cdr ac))) + (h2 (logand 65535 (+ h1 (lsh l1 -16)))) + (l2 (logand 65535 l1)) + ;; cyclic shift of 32 bits integer + (h3 (logand 65535 (if (> s 15) + (+ (lsh h2 (- s 32)) (lsh l2 (- s 16))) + (+ (lsh h2 s) (lsh l2 (- s 16)))))) + (l3 (logand 65535 (if (> s 15) + (+ (lsh l2 (- s 32)) (lsh h2 (- s 16))) + (+ (lsh l2 s) (lsh h2 (- s 16))))))) + (cons h3 l3))))) + +(md4-make-step md4-round1 md4-F) +(md4-make-step md4-round2 md4-G) +(md4-make-step md4-round3 md4-H) + +(defsubst md4-add (x y) + "Return 32-bit sum of 32-bit integers X and Y." + (let ((h (+ (car x) (car y))) + (l (+ (cdr x) (cdr y)))) + (cons (logand 65535 (+ h (lsh l -16))) (logand 65535 l)))) + +(defsubst md4-and (x y) + (cons (logand (car x) (car y)) (logand (cdr x) (cdr y)))) + +(defun md4-64 (m) + "Calculate md4 of 64 bytes chunk M which is represented as 16 pairs of +32 bits integers. The resulting md4 value is placed in md4-buffer." + (let ((a (aref md4-buffer 0)) + (b (aref md4-buffer 1)) + (c (aref md4-buffer 2)) + (d (aref md4-buffer 3))) + (setq a (md4-round1 a b c d (aref m 0) 3 '(0 . 0)) + d (md4-round1 d a b c (aref m 1) 7 '(0 . 0)) + c (md4-round1 c d a b (aref m 2) 11 '(0 . 0)) + b (md4-round1 b c d a (aref m 3) 19 '(0 . 0)) + a (md4-round1 a b c d (aref m 4) 3 '(0 . 0)) + d (md4-round1 d a b c (aref m 5) 7 '(0 . 0)) + c (md4-round1 c d a b (aref m 6) 11 '(0 . 0)) + b (md4-round1 b c d a (aref m 7) 19 '(0 . 0)) + a (md4-round1 a b c d (aref m 8) 3 '(0 . 0)) + d (md4-round1 d a b c (aref m 9) 7 '(0 . 0)) + c (md4-round1 c d a b (aref m 10) 11 '(0 . 0)) + b (md4-round1 b c d a (aref m 11) 19 '(0 . 0)) + a (md4-round1 a b c d (aref m 12) 3 '(0 . 0)) + d (md4-round1 d a b c (aref m 13) 7 '(0 . 0)) + c (md4-round1 c d a b (aref m 14) 11 '(0 . 0)) + b (md4-round1 b c d a (aref m 15) 19 '(0 . 0)) + + a (md4-round2 a b c d (aref m 0) 3 '(23170 . 31129)) ;0x5A827999 + d (md4-round2 d a b c (aref m 4) 5 '(23170 . 31129)) + c (md4-round2 c d a b (aref m 8) 9 '(23170 . 31129)) + b (md4-round2 b c d a (aref m 12) 13 '(23170 . 31129)) + a (md4-round2 a b c d (aref m 1) 3 '(23170 . 31129)) + d (md4-round2 d a b c (aref m 5) 5 '(23170 . 31129)) + c (md4-round2 c d a b (aref m 9) 9 '(23170 . 31129)) + b (md4-round2 b c d a (aref m 13) 13 '(23170 . 31129)) + a (md4-round2 a b c d (aref m 2) 3 '(23170 . 31129)) + d (md4-round2 d a b c (aref m 6) 5 '(23170 . 31129)) + c (md4-round2 c d a b (aref m 10) 9 '(23170 . 31129)) + b (md4-round2 b c d a (aref m 14) 13 '(23170 . 31129)) + a (md4-round2 a b c d (aref m 3) 3 '(23170 . 31129)) + d (md4-round2 d a b c (aref m 7) 5 '(23170 . 31129)) + c (md4-round2 c d a b (aref m 11) 9 '(23170 . 31129)) + b (md4-round2 b c d a (aref m 15) 13 '(23170 . 31129)) + + a (md4-round3 a b c d (aref m 0) 3 '(28377 . 60321)) ;0x6ED9EBA1 + d (md4-round3 d a b c (aref m 8) 9 '(28377 . 60321)) + c (md4-round3 c d a b (aref m 4) 11 '(28377 . 60321)) + b (md4-round3 b c d a (aref m 12) 15 '(28377 . 60321)) + a (md4-round3 a b c d (aref m 2) 3 '(28377 . 60321)) + d (md4-round3 d a b c (aref m 10) 9 '(28377 . 60321)) + c (md4-round3 c d a b (aref m 6) 11 '(28377 . 60321)) + b (md4-round3 b c d a (aref m 14) 15 '(28377 . 60321)) + a (md4-round3 a b c d (aref m 1) 3 '(28377 . 60321)) + d (md4-round3 d a b c (aref m 9) 9 '(28377 . 60321)) + c (md4-round3 c d a b (aref m 5) 11 '(28377 . 60321)) + b (md4-round3 b c d a (aref m 13) 15 '(28377 . 60321)) + a (md4-round3 a b c d (aref m 3) 3 '(28377 . 60321)) + d (md4-round3 d a b c (aref m 11) 9 '(28377 . 60321)) + c (md4-round3 c d a b (aref m 7) 11 '(28377 . 60321)) + b (md4-round3 b c d a (aref m 15) 15 '(28377 . 60321))) + + (aset md4-buffer 0 (md4-add a (aref md4-buffer 0))) + (aset md4-buffer 1 (md4-add b (aref md4-buffer 1))) + (aset md4-buffer 2 (md4-add c (aref md4-buffer 2))) + (aset md4-buffer 3 (md4-add d (aref md4-buffer 3))) + )) + +(defun md4-copy64 (seq) + "Unpack a 64 bytes string into 16 pairs of 32 bits integers." + (let ((int32s (make-vector 16 0)) (i 0) j) + (while (< i 16) + (setq j (* i 4)) + (aset int32s i (cons (+ (aref seq (+ j 2)) (lsh (aref seq (+ j 3)) 8)) + (+ (aref seq j) (lsh (aref seq (1+ j)) 8)))) + (setq i (1+ i))) + int32s)) + +;;; +;;; sub functions + +(defun md4-pack-int16 (int16) + "Pack 16 bits integer in 2 bytes string as little endian." + (let ((str (make-string 2 0))) + (aset str 0 (logand int16 255)) + (aset str 1 (lsh int16 -8)) + str)) + +(defun md4-pack-int32 (int32) + "Pack 32 bits integer in a 4 bytes string as little endian. A 32 bits +integer is represented as a pair of two 16 bits integers (cons high low)." + (let ((str (make-string 4 0)) + (h (car int32)) (l (cdr int32))) + (aset str 0 (logand l 255)) + (aset str 1 (lsh l -8)) + (aset str 2 (logand h 255)) + (aset str 3 (lsh h -8)) + str)) + +(defun md4-unpack-int16 (str) + (if (eq 2 (length str)) + (+ (lsh (aref str 1) 8) (aref str 0)) + (error "%s is not 2 bytes long" str))) + +(defun md4-unpack-int32 (str) + (if (eq 4 (length str)) + (cons (+ (lsh (aref str 3) 8) (aref str 2)) + (+ (lsh (aref str 1) 8) (aref str 0))) + (error "%s is not 4 bytes long" str))) + +(provide 'md4) + +;;; md4.el ends here diff --git a/lisp/ntlm.el b/lisp/ntlm.el new file mode 100644 index 000000000..2f0b9b0aa --- /dev/null +++ b/lisp/ntlm.el @@ -0,0 +1,530 @@ +;;; ntlm.el --- NTLM (NT LanManager) authentication support + +;; Copyright (C) 2001 Taro Kawagishi +;; Author: Taro Kawagishi +;; Keywords: NTLM, SASL +;; Version: 1.00 +;; Created: February 2001 + +;; This program 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 2, or (at your option) +;; any later version. +;; +;; This program 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 this program; see the file COPYING. If not, write to the +;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, +;; Boston, MA 02111-1307, USA. + +;;; Commentary: + +;; This library is a direct translation of the Samba release 2.2.0 +;; implementation of Windows NT and LanManager compatible password +;; encryption. +;; +;; Interface functions: +;; +;; ntlm-build-auth-request +;; This will return a binary string, which should be used in the +;; base64 encoded form and it is the caller's responsibility to encode +;; the returned string with base64. +;; +;; ntlm-build-auth-response +;; It is the caller's responsibility to pass a base64 decoded string +;; (which will be a binary string) as the first argument and to +;; encode the returned string with base64. The second argument user +;; should be given in user@domain format. +;; +;; ntlm-get-password-hashes +;; +;; +;; NTLM authentication procedure example: +;; +;; 1. Open a network connection to the Exchange server at the IMAP port (143) +;; 2. Receive an opening message such as: +;; "* OK Microsoft Exchange IMAP4rev1 server version 5.5.2653.7 (XXXX) ready" +;; 3. Ask for IMAP server capability by sending "NNN capability" +;; 4. Receive a capability message such as: +;; "* CAPABILITY IMAP4 IMAP4rev1 IDLE LITERAL+ LOGIN-REFERRALS MAILBOX-REFERRALS NAMESPACE AUTH=NTLM" +;; 5. Ask for NTLM authentication by sending a string +;; "NNN authenticate ntlm" +;; 6. Receive continuation acknowledgment "+" +;; 7. Send NTLM authentication request generated by 'ntlm-build-auth-request +;; 8. Receive NTLM challenge string following acknowledgment "+" +;; 9. Generate response to challenge by 'ntlm-build-auth-response +;; (here two hash function values of the user password are encrypted) +;; 10. Receive authentication completion message such as +;; "NNN OK AUTHENTICATE NTLM completed." + +;;; Code: + +(require 'md4) + +;;; +;;; NTLM authentication interface functions + +(defun ntlm-build-auth-request (user &optional domain) + "Return the NTLM authentication request string for USER and DOMAIN. +USER is a string representing a user name to be authenticated and +DOMAIN is a NT domain. USER can include a NT domain part as in +user@domain where the string after @ is used as the domain if DOMAIN +is not given." + (interactive) + (let ((request-ident (concat "NTLMSSP" (make-string 1 0))) + (request-msgType (concat (make-string 1 1) (make-string 3 0))) + ;0x01 0x00 0x00 0x00 + (request-flags (concat (make-string 1 7) (make-string 1 178) + (make-string 2 0))) + ;0x07 0xb2 0x00 0x00 + lu ld off-d off-u) + (when (string-match "@" user) + (unless domain + (setq domain (substring user (1+ (match-beginning 0))))) + (setq user (substring user 0 (match-beginning 0)))) + ;; set fields offsets within the request struct + (setq lu (length user)) + (setq ld (length domain)) + (setq off-u 32) ;offset to the string 'user + (setq off-d (+ 32 lu)) ;offset to the string 'domain + ;; pack the request struct in a string + (concat request-ident ;8 bytes + request-msgType ;4 bytes + request-flags ;4 bytes + (md4-pack-int16 lu) ;user field, count field + (md4-pack-int16 lu) ;user field, max count field + (md4-pack-int32 (cons 0 off-u)) ;user field, offset field + (md4-pack-int16 ld) ;domain field, count field + (md4-pack-int16 ld) ;domain field, max count field + (md4-pack-int32 (cons 0 off-d)) ;domain field, offset field + user ;bufer field + domain ;bufer field + ))) + +(defun ntlm-build-auth-response (challenge user password-hashes) + "Return the response string to a challenge string CHALLENGE given by +the NTLM based server for the user USER and the password hash list +PASSWORD-HASHES. NTLM uses two hash values which are represented +by PASSWORD-HASHES. PASSWORD-HASHES should be a return value of + (list (smb-passwd-hash password) (ntlm-md4hash password))" + (let* ((rchallenge (string-as-unibyte challenge)) + ;; get fields within challenge struct + ;;(ident (substring rchallenge 0 8)) ;ident, 8 bytes + ;;(msgType (substring rchallenge 8 12)) ;msgType, 4 bytes + (uDomain (substring rchallenge 12 20)) ;uDomain, 8 bytes + (flags (substring rchallenge 20 24)) ;flags, 4 bytes + (challengeData (substring rchallenge 24 32)) ;challengeData, 8 bytes + uDomain-len uDomain-offs + ;; response struct and its fields + lmRespData ;lmRespData, 24 bytes + ntRespData ;ntRespData, 24 bytes + domain ;ascii domain string + lu ld off-lm off-nt off-d off-u off-w off-s) + ;; extract domain string from challenge string + (setq uDomain-len (md4-unpack-int16 (substring uDomain 0 2))) + (setq uDomain-offs (md4-unpack-int32 (substring uDomain 4 8))) + (setq domain + (ntlm-unicode2ascii (substring challenge + (cdr uDomain-offs) + (+ (cdr uDomain-offs) uDomain-len)) + (/ uDomain-len 2))) + ;; overwrite domain in case user is given in @ format + (when (string-match "@" user) + (setq domain (substring user (1+ (match-beginning 0)))) + (setq user (substring user 0 (match-beginning 0)))) + + ;; generate response data + (setq lmRespData + (smb-owf-encrypt (car password-hashes) challengeData)) + (setq ntRespData + (smb-owf-encrypt (cadr password-hashes) challengeData)) + + ;; get offsets to fields to pack the response struct in a string + (setq lu (length user)) + (setq ld (length domain)) + (setq off-lm 64) ;offset to string 'lmResponse + (setq off-nt (+ 64 24)) ;offset to string 'ntResponse + (setq off-d (+ 64 48)) ;offset to string 'uDomain + (setq off-u (+ 64 48 (* 2 ld))) ;offset to string 'uUser + (setq off-w (+ 64 48 (* 2 (+ ld lu)))) ;offset to string 'uWks + (setq off-s (+ 64 48 (* 2 (+ ld lu lu)))) ;offset to string 'sessionKey + ;; pack the response struct in a string + (concat "NTLMSSP\0" ;response ident field, 8 bytes + (md4-pack-int32 '(0 . 3)) ;response msgType field, 4 bytes + + ;; lmResponse field, 8 bytes + ;;AddBytes(response,lmResponse,lmRespData,24); + (md4-pack-int16 24) ;len field + (md4-pack-int16 24) ;maxlen field + (md4-pack-int32 (cons 0 off-lm)) ;field offset + + ;; ntResponse field, 8 bytes + ;;AddBytes(response,ntResponse,ntRespData,24); + (md4-pack-int16 24) ;len field + (md4-pack-int16 24) ;maxlen field + (md4-pack-int32 (cons 0 off-nt)) ;field offset + + ;; uDomain field, 8 bytes + ;;AddUnicodeString(response,uDomain,domain); + ;;AddBytes(response, uDomain, udomain, 2*ld); + (md4-pack-int16 (* 2 ld)) ;len field + (md4-pack-int16 (* 2 ld)) ;maxlen field + (md4-pack-int32 (cons 0 off-d)) ;field offset + + ;; uUser field, 8 bytes + ;;AddUnicodeString(response,uUser,u); + ;;AddBytes(response, uUser, uuser, 2*lu); + (md4-pack-int16 (* 2 lu)) ;len field + (md4-pack-int16 (* 2 lu)) ;maxlen field + (md4-pack-int32 (cons 0 off-u)) ;field offset + + ;; uWks field, 8 bytes + ;;AddUnicodeString(response,uWks,u); + (md4-pack-int16 (* 2 lu)) ;len field + (md4-pack-int16 (* 2 lu)) ;maxlen field + (md4-pack-int32 (cons 0 off-w)) ;field offset + + ;; sessionKey field, 8 bytes + ;;AddString(response,sessionKey,NULL); + (md4-pack-int16 0) ;len field + (md4-pack-int16 0) ;maxlen field + (md4-pack-int32 (cons 0 (- off-s off-lm))) ;field offset + + ;; flags field, 4 bytes + flags ; + + ;; buffer field + lmRespData ;lmResponse, 24 bytes + ntRespData ;ntResponse, 24 bytes + (ntlm-ascii2unicode domain ;unicode domain string, 2*ld bytes + (length domain)) ; + (ntlm-ascii2unicode user ;unicode user string, 2*lu bytes + (length user)) ; + (ntlm-ascii2unicode user ;unicode user string, 2*lu bytes + (length user)) ; + ))) + +(defun ntlm-get-password-hashes (password) + "Return a pair of SMB hash and NT MD4 hash of the given password PASSWORD" + (list (smb-passwd-hash password) + (ntlm-md4hash password))) + +(defun ntlm-ascii2unicode (str len) + "Convert an ASCII string into a NT Unicode string, which is +little-endian utf16." + (let ((utf (make-string (* 2 len) 0)) (i 0) val) + (while (and (< i len) + (not (zerop (setq val (aref str i))))) + (aset utf (* 2 i) val) + (aset utf (1+ (* 2 i)) 0) + (setq i (1+ i))) + utf)) + +(defun ntlm-unicode2ascii (str len) + "Extract 7 bits ASCII part of a little endian utf16 string STR of length LEN." + (let ((buf (make-string len 0)) (i 0) (j 0)) + (while (< i len) + (aset buf i (logand (aref str j) 127)) ;(string-to-number "7f" 16) + (setq i (1+ i) + j (+ 2 j))) + buf)) + +(defun smb-passwd-hash (passwd) + "Return the SMB password hash string of 16 bytes long for the given password +string PASSWD. PASSWD is truncated to 14 bytes if longer." + (let ((len (min (length passwd) 14))) + (smbdes-e-p16 + (concat (substring (upcase passwd) 0 len) ;fill top 14 bytes with passwd + (make-string (- 15 len) 0))))) + +(defun smb-owf-encrypt (passwd c8) + "Return the response string of 24 bytes long for the given password +string PASSWD based on the DES encryption. PASSWD is of at most 14 +bytes long and the challenge string C8 of 8 bytes long." + (let ((len (min (length passwd) 16)) p22) + (setq p22 (concat (substring passwd 0 len) ;fill top 16 bytes with passwd + (make-string (- 22 len) 0))) + (smbdes-e-p24 p22 c8))) + +(defun smbdes-e-p24 (p22 c8) + "Return a 24 bytes hashed string for a 21 bytes string P22 and a 8 bytes +string C8." + (concat (smbhash c8 p22 t) ;hash first 8 bytes of p22 + (smbhash c8 (substring p22 7) t) + (smbhash c8 (substring p22 14) t))) + +(defconst smb-sp8 [75 71 83 33 64 35 36 37]) + +(defun smbdes-e-p16 (p15) + "Return a 16 bytes hashed string for a 15 bytes string P15." + (concat (smbhash smb-sp8 p15 t) ;hash of first 8 bytes of p15 + (smbhash smb-sp8 (substring p15 7) t) ;hash of last 8 bytes of p15 + )) + +(defun smbhash (in key forw) + "Return the hash string of length 8 for a string IN of length 8 and +a string KEY of length 8. FORW is t or nil." + (let ((out (make-string 8 0)) + outb ;string of length 64 + (inb (make-string 64 0)) + (keyb (make-string 64 0)) + (key2 (smb-str-to-key key)) + (i 0) aa) + (while (< i 64) + (unless (zerop (logand (aref in (/ i 8)) (lsh 1 (- 7 (% i 8))))) + (aset inb i 1)) + (unless (zerop (logand (aref key2 (/ i 8)) (lsh 1 (- 7 (% i 8))))) + (aset keyb i 1)) + (setq i (1+ i))) + (setq outb (smb-dohash inb keyb forw)) + (setq i 0) + (while (< i 64) + (unless (zerop (aref outb i)) + (setq aa (aref out (/ i 8))) + (aset out (/ i 8) + (logior aa (lsh 1 (- 7 (% i 8)))))) + (setq i (1+ i))) + out)) + +(defun smb-str-to-key (str) + "Return a string of length 8 for the given string STR of length 7." + (let ((key (make-string 8 0)) + (i 7)) + (aset key 0 (lsh (aref str 0) -1)) + (aset key 1 (logior + (lsh (logand (aref str 0) 1) 6) + (lsh (aref str 1) -2))) + (aset key 2 (logior + (lsh (logand (aref str 1) 3) 5) + (lsh (aref str 2) -3))) + (aset key 3 (logior + (lsh (logand (aref str 2) 7) 4) + (lsh (aref str 3) -4))) + (aset key 4 (logior + (lsh (logand (aref str 3) 15) 3) + (lsh (aref str 4) -5))) + (aset key 5 (logior + (lsh (logand (aref str 4) 31) 2) + (lsh (aref str 5) -6))) + (aset key 6 (logior + (lsh (logand (aref str 5) 63) 1) + (lsh (aref str 6) -7))) + (aset key 7 (logand (aref str 6) 127)) + (while (>= i 0) + (aset key i (lsh (aref key i) 1)) + (setq i (1- i))) + key)) + +(defconst smb-perm1 [57 49 41 33 25 17 9 + 1 58 50 42 34 26 18 + 10 2 59 51 43 35 27 + 19 11 3 60 52 44 36 + 63 55 47 39 31 23 15 + 7 62 54 46 38 30 22 + 14 6 61 53 45 37 29 + 21 13 5 28 20 12 4]) + +(defconst smb-perm2 [14 17 11 24 1 5 + 3 28 15 6 21 10 + 23 19 12 4 26 8 + 16 7 27 20 13 2 + 41 52 31 37 47 55 + 30 40 51 45 33 48 + 44 49 39 56 34 53 + 46 42 50 36 29 32]) + +(defconst smb-perm3 [58 50 42 34 26 18 10 2 + 60 52 44 36 28 20 12 4 + 62 54 46 38 30 22 14 6 + 64 56 48 40 32 24 16 8 + 57 49 41 33 25 17 9 1 + 59 51 43 35 27 19 11 3 + 61 53 45 37 29 21 13 5 + 63 55 47 39 31 23 15 7]) + +(defconst smb-perm4 [32 1 2 3 4 5 + 4 5 6 7 8 9 + 8 9 10 11 12 13 + 12 13 14 15 16 17 + 16 17 18 19 20 21 + 20 21 22 23 24 25 + 24 25 26 27 28 29 + 28 29 30 31 32 1]) + +(defconst smb-perm5 [16 7 20 21 + 29 12 28 17 + 1 15 23 26 + 5 18 31 10 + 2 8 24 14 + 32 27 3 9 + 19 13 30 6 + 22 11 4 25]) + +(defconst smb-perm6 [40 8 48 16 56 24 64 32 + 39 7 47 15 55 23 63 31 + 38 6 46 14 54 22 62 30 + 37 5 45 13 53 21 61 29 + 36 4 44 12 52 20 60 28 + 35 3 43 11 51 19 59 27 + 34 2 42 10 50 18 58 26 + 33 1 41 9 49 17 57 25]) + +(defconst smb-sc [1 1 2 2 2 2 2 2 1 2 2 2 2 2 2 1]) + +(defconst smb-sbox [[[14 4 13 1 2 15 11 8 3 10 6 12 5 9 0 7] + [ 0 15 7 4 14 2 13 1 10 6 12 11 9 5 3 8] + [ 4 1 14 8 13 6 2 11 15 12 9 7 3 10 5 0] + [15 12 8 2 4 9 1 7 5 11 3 14 10 0 6 13]] + [[15 1 8 14 6 11 3 4 9 7 2 13 12 0 5 10] + [ 3 13 4 7 15 2 8 14 12 0 1 10 6 9 11 5] + [ 0 14 7 11 10 4 13 1 5 8 12 6 9 3 2 15] + [13 8 10 1 3 15 4 2 11 6 7 12 0 5 14 9]] + [[10 0 9 14 6 3 15 5 1 13 12 7 11 4 2 8] + [13 7 0 9 3 4 6 10 2 8 5 14 12 11 15 1] + [13 6 4 9 8 15 3 0 11 1 2 12 5 10 14 7] + [ 1 10 13 0 6 9 8 7 4 15 14 3 11 5 2 12]] + [[ 7 13 14 3 0 6 9 10 1 2 8 5 11 12 4 15] + [13 8 11 5 6 15 0 3 4 7 2 12 1 10 14 9] + [10 6 9 0 12 11 7 13 15 1 3 14 5 2 8 4] + [ 3 15 0 6 10 1 13 8 9 4 5 11 12 7 2 14]] + [[ 2 12 4 1 7 10 11 6 8 5 3 15 13 0 14 9] + [14 11 2 12 4 7 13 1 5 0 15 10 3 9 8 6] + [ 4 2 1 11 10 13 7 8 15 9 12 5 6 3 0 14] + [11 8 12 7 1 14 2 13 6 15 0 9 10 4 5 3]] + [[12 1 10 15 9 2 6 8 0 13 3 4 14 7 5 11] + [10 15 4 2 7 12 9 5 6 1 13 14 0 11 3 8] + [ 9 14 15 5 2 8 12 3 7 0 4 10 1 13 11 6] + [ 4 3 2 12 9 5 15 10 11 14 1 7 6 0 8 13]] + [[ 4 11 2 14 15 0 8 13 3 12 9 7 5 10 6 1] + [13 0 11 7 4 9 1 10 14 3 5 12 2 15 8 6] + [ 1 4 11 13 12 3 7 14 10 15 6 8 0 5 9 2] + [ 6 11 13 8 1 4 10 7 9 5 0 15 14 2 3 12]] + [[13 2 8 4 6 15 11 1 10 9 3 14 5 0 12 7] + [ 1 15 13 8 10 3 7 4 12 5 6 11 0 14 9 2] + [ 7 11 4 1 9 12 14 2 0 6 10 13 15 3 5 8] + [ 2 1 14 7 4 10 8 13 15 12 9 0 3 5 6 11]]]) + +(defsubst string-permute (in perm n) + "Return a string of length N for a string IN and a permutation vector +PERM of size N. The length of IN should be height of PERM." + (let ((i 0) (out (make-string n 0))) + (while (< i n) + (aset out i (aref in (- (aref perm i) 1))) + (setq i (1+ i))) + out)) + +(defsubst string-lshift (str count len) + "Return a string by circularly shifting a string STR by COUNT to the left. +length of STR is LEN." + (let ((c (% count len))) + (concat (substring str c len) (substring str 0 c)))) + +(defsubst string-xor (in1 in2 n) + "Return exclusive-or of sequences in1 and in2" + (let ((w (make-string n 0)) (i 0)) + (while (< i n) + (aset w i (logxor (aref in1 i) (aref in2 i))) + (setq i (1+ i))) + w)) + +(defun smb-dohash (in key forw) + "Return the hash value for a string IN and a string KEY. +Length of IN and KEY are 64. FORW non nill means forward, nil means +backward." + (let (pk1 ;string of length 56 + c ;string of length 28 + d ;string of length 28 + cd ;string of length 56 + (ki (make-vector 16 0)) ;vector of string of length 48 + pd1 ;string of length 64 + l ;string of length 32 + r ;string of length 32 + rl ;string of length 64 + (i 0) (j 0) (k 0)) + (setq pk1 (string-permute key smb-perm1 56)) + (setq c (substring pk1 0 28)) + (setq d (substring pk1 28 56)) + + (setq i 0) + (while (< i 16) + (setq c (string-lshift c (aref smb-sc i) 28)) + (setq d (string-lshift d (aref smb-sc i) 28)) + (setq cd (concat (substring c 0 28) (substring d 0 28))) + (aset ki i (string-permute cd smb-perm2 48)) + (setq i (1+ i))) + + (setq pd1 (string-permute in smb-perm3 64)) + + (setq l (substring pd1 0 32)) + (setq r (substring pd1 32 64)) + + (setq i 0) + (let (er ;string of length 48 + erk ;string of length 48 + (b (make-vector 8 0)) ;vector of strings of length 6 + cb ;string of length 32 + pcb ;string of length 32 + r2 ;string of length 32 + jj m n bj sbox-jmn) + (while (< i 16) + (setq er (string-permute r smb-perm4 48)) + (setq erk (string-xor er + (aref ki (if forw i (- 15 i))) + 48)) + (setq j 0) + (while (< j 8) + (setq jj (* 6 j)) + (aset b j (substring erk jj (+ jj 6))) + (setq j (1+ j))) + (setq j 0) + (while (< j 8) + (setq bj (aref b j)) + (setq m (logior (lsh (aref bj 0) 1) (aref bj 5))) + (setq n (logior (lsh (aref bj 1) 3) + (lsh (aref bj 2) 2) + (lsh (aref bj 3) 1) + (aref bj 4))) + (setq k 0) + (setq sbox-jmn (aref (aref (aref smb-sbox j) m) n)) + (while (< k 4) + (aset bj k + (if (zerop (logand sbox-jmn (lsh 1 (- 3 k)))) + 0 1)) + (setq k (1+ k))) + (setq j (1+ j))) + + (setq j 0) + (setq cb nil) + (while (< j 8) + (setq cb (concat cb (substring (aref b j) 0 4))) + (setq j (1+ j))) + + (setq pcb (string-permute cb smb-perm5 32)) + (setq r2 (string-xor l pcb 32)) + (setq l r) + (setq r r2) + (setq i (1+ i)))) + (setq rl (concat r l)) + (string-permute rl smb-perm6 64))) + +(defun ntlm-md4hash (passwd) + "Return the 16 bytes MD4 hash of a string PASSWD after converting it +into a Unicode string. PASSWD is truncated to 128 bytes if longer." + (let (len wpwd) + ;; Password cannot be longer than 128 characters + (setq len (length passwd)) + (if (> len 128) + (setq len 128)) + ;; Password must be converted to NT unicode + (setq wpwd (ntlm-ascii2unicode passwd len)) + ;; Calculate length in bytes + (setq len (* len 2)) + (md4 wpwd len))) + +(provide 'ntlm) + +;;; ntlm.el ends here diff --git a/lisp/sasl-ntlm.el b/lisp/sasl-ntlm.el new file mode 100644 index 000000000..67b4c96b5 --- /dev/null +++ b/lisp/sasl-ntlm.el @@ -0,0 +1,65 @@ +;;; sasl-ntlm.el --- NTLM (NT Lan Manager) module for the SASL client framework + +;; Copyright (C) 2000 Free Software Foundation, Inc. + +;; Author: Taro Kawagishi +;; Keywords: SASL, NTLM +;; Version: 1.00 +;; Created: February 2001 + +;; This program 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 2, or (at your option) +;; any later version. +;; +;; This program 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 this program; see the file COPYING. If not, write to the +;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, +;; Boston, MA 02111-1307, USA. + +;;; Commentary: + +;; This is a SASL interface layer for NTLM authentication message +;; generation by ntlm.el + +;;; Code: + +(require 'sasl) +(require 'ntlm) + +(defconst sasl-ntlm-steps + '(ignore ;nothing to do before making + sasl-ntlm-request ;authentication request + sasl-ntlm-response) ;response to challenge + "A list of functions to be called in sequnece for the NTLM +authentication steps. Ther are called by 'sasl-next-step.") + +(defun sasl-ntlm-request (client step) + "SASL step function to generate a NTLM authentication request to the server. +Called from 'sasl-next-step. +CLIENT is a vector [mechanism user service server sasl-client-properties] +STEP is a vector [ ]" + (let ((user (sasl-client-name client))) + (ntlm-build-auth-request user))) + +(defun sasl-ntlm-response (client step) + "SASL step function to generate a NTLM response against the server +challenge stored in the 2nd element of STEP. Called from 'sasl-next-step." + (let* ((user (sasl-client-name client)) + (passphrase + (sasl-read-passphrase (format "NTLM passphrase for %s: " user))) + (challenge (sasl-step-data step))) + (ntlm-build-auth-response challenge user + (ntlm-get-password-hashes passphrase)))) + +(put 'sasl-ntlm 'sasl-mechanism + (sasl-make-mechanism "NTLM" sasl-ntlm-steps)) + +(provide 'sasl-ntlm) + +;;; sasl-ntlm.el ends here -- 2.34.1