+++ /dev/null
-;;; sha1.el --- SHA1 Message Digest Algorithm.
-;; Copyright (C) 1998,1999 Keiichi Suzuki.
-
-;; Author: Keiichi Suzuki <kei-suzu@mail.wbs.ne.jp>
-;; Author: Katsumi Yamaoka <yamaoka@jpl.org>
-;; Created: 1998-12-25
-;; Revised: 1999-01-13
-;; Keywords: sha1, news, cancel-lock, hmac, rfc2104
-
-;; 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.
-
-;;; A copy of the GNU General Public License can be obtained from this
-;;; program's author (send electronic mail to kyle@uunet.uu.net) or from
-;;; the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA
-;;; 02139, USA.
-
-;;; Commentary:
-
-;; This is a direct translation into Emacs LISP of the reference C
-;; implementation of the SHA1 message digest algorithm.
-
-;;; Usage:
-
-;; To compute the SHA1 message digest for a message M (represented as
-;; a string), call
-;;
-;; (sha1-encode M)
-;;
-;; which returns the message digest as a hexadecimal string of 20 bytes.
-;; If you need to supply the message in pieces M1, M2, ... Mn, then call
-;;
-;; (sha1-init)
-;; (sha1-update M1)
-;; (sha1-update M2)
-;; ...
-;; (sha1-update Mn)
-;; (sha1-final)
-
-;;; Notes:
-
-;; The C algorithm uses 32-bit integers; because GNU Emacs
-;; implementations provide 28-bit integers (with 24-bit integers on
-;; versions prior to 19.29), the code represents a 32-bit integer as the
-;; cons of two 16-bit integers. The most significant word is stored in
-;; the car and the least significant in the cdr. The algorithm requires
-;; at least 19 bits of integer representation in order to represent the
-;; carry from a 16-bit addition. (see sha1-add())
-
-;;; Code:
-
-(defmacro sha1-f1 (x y z)
- `(cons
- (logior (logand (car ,x) (car ,y)) (logand (lognot (car ,x)) (car ,z)))
- (logior (logand (cdr ,x) (cdr ,y)) (logand (lognot (cdr ,x)) (cdr ,z)))
- ))
-
-(defmacro sha1-f2 (x y z)
- `(cons
- (logxor (car ,x) (car ,y) (car ,z))
- (logxor (cdr ,x) (cdr ,y) (cdr ,z))
- ))
-
-(defmacro sha1-f3 (x y z)
- `(cons
- (logior (logand (car ,x) (car ,y)) (logand (car ,x) (car ,z))
- (logand (car ,y) (car ,z)))
- (logior (logand (cdr ,x) (cdr ,y)) (logand (cdr ,x) (cdr ,z))
- (logand (cdr ,y) (cdr ,z)))
- ))
-
-(defmacro sha1-f4 (x y z)
- `(cons
- (logxor (car ,x) (car ,y) (car ,z))
- (logxor (cdr ,x) (cdr ,y) (cdr ,z))
- ))
-
-(defconst sha1-const1 '(23170 . 31129)
- "SHA constants 1 \(0x5a827999\)")
-(defconst sha1-const2 '(28377 . 60321)
- "SHA constants 2 \(0x6ed9eba1\)")
-(defconst sha1-const3 '(36635 . 48348)
- "SHA constants 3 \(0x8f1bbcdc\)")
-(defconst sha1-const4 '(51810 . 49622)
- "SHA constants 4 \(0xca62c1d6\)")
-
-(defvar sha1-digest (make-vector 5 nil))
-(defvar sha1-count-lo nil)
-(defvar sha1-count-hi nil)
-(defvar sha1-data nil)
-(defvar sha1-local nil)
-(defconst SHA1-BLOCKSIZE 64)
-
-(defun sha1-init ()
- "Initialize the state of the SHA1 message digest routines."
- (aset sha1-digest 0 (cons 26437 8961))
- (aset sha1-digest 1 (cons 61389 43913))
- (aset sha1-digest 2 (cons 39098 56574))
- (aset sha1-digest 3 (cons 4146 21622))
- (aset sha1-digest 4 (cons 50130 57840))
- (setq sha1-count-lo (cons 0 0)
- sha1-count-hi (cons 0 0)
- sha1-local 0
- sha1-data nil)
- )
-
-(defmacro sha1-32-make (v)
- "Return 32bits internal value from normal integer."
- `(cons (lsh ,v -16) (logand 65535 ,v)))
-
-(defun sha1-add (to &rest vals)
- "Set sum of all the arguments to the first one."
- (let (val)
- (while (setq val (car vals))
- (setcar to (+ (car to) (car val)))
- (setcdr to (+ (cdr to) (cdr val)))
- (setq vals (cdr vals))
- )
- (setcar to (logand 65535 (+ (car to) (lsh (cdr to) -16))))
- (setcdr to (logand 65535 (cdr to)))
- to
- ))
-
-(defun sha1-xor (to &rest vals)
- "Set bitwise-exclusive-or of all the arguments to the first one."
- (let (val)
- (while (setq val (car vals))
- (setcar to (logxor (car to) (car val)))
- (setcdr to (logxor (cdr to) (cdr val)))
- (setq vals (cdr vals)))
- ))
-
-(defmacro sha1-rot (val c1 c2)
- "Internal macro for sha1-rot-*."
- `(cons
- (logand 65535 (logior (lsh (car ,val) ,c1) (lsh (cdr ,val) ,c2)))
- (logand 65535 (logior (lsh (cdr ,val) ,c1) (lsh (car ,val) ,c2)))
- ))
-
-(defmacro sha1-rot-1 (val)
- "Return VAL with its bits rotated left by 1."
- `(sha1-rot ,val 1 -15)
- )
-
-(defmacro sha1-rot-5 (val)
- "Return VAL with its bits rotated left by 5."
- `(sha1-rot ,val 5 -11)
- )
-
-(defmacro sha1-rot-30 (val)
- "Return VAL with its bits rotated left by 30."
- `(sha1-rot ,val -2 14)
- )
-
-(defun sha1-inc (to)
- "Set TO pulus one to TO."
- (setcdr to (1+ (cdr to)))
- (when (> (cdr to) 65535)
- (setcdr to (logand 65535 (cdr to)))
- (setcar to (logand 65535 (1+ (car to))))))
-
-(defun sha1-lsh (to v count)
- "Set TO with its bits shifted left by COUNT to TO."
- (setcar to (logand 65535
- (logior (lsh (car v) count) (lsh (cdr v) (- count 16)))))
- (setcdr to (logand 65535 (lsh (cdr v) count)))
- to
- )
-
-(defun sha1-rsh (to v count)
- "Set TO with its bits shifted right by COUNT to TO."
- (setq count (- 0 count))
- (setcdr to (logand 65535
- (logior (lsh (cdr v) count) (lsh (car v) (- count 16)))))
- (setcar to (logand 65535 (lsh (car v) count)))
- to
- )
-
-(defun sha1-< (v1 v2)
- "Return t if firast argment is less then second argument."
- (or (< (car v1) (car v2))
- (and (eq (car v1) (car v2))
- (< (cdr v1) (cdr v2))))
- )
-
-(unless (fboundp 'string-as-unibyte)
- (defsubst string-as-unibyte (string)
- string)
- )
-
-(defun sha1-update (bytes)
- "Update the current SHA1 state with BYTES (an string of uni-bytes)."
- (setq bytes (string-as-unibyte bytes))
- (let* ((len (length bytes))
- (len32 (sha1-32-make len))
- (tmp32 (cons 0 0))
- (top 0)
- (clo (cons 0 0))
- i done)
- (sha1-add clo sha1-count-lo (sha1-lsh tmp32 len32 3))
- (when (sha1-< clo sha1-count-lo)
- (sha1-inc sha1-count-hi))
- (setq sha1-count-lo clo)
- (sha1-add sha1-count-hi (sha1-rsh tmp32 len32 29))
- (when (> (length sha1-data) 0)
- (setq i (- SHA1-BLOCKSIZE (length sha1-data)))
- (when (> i len)
- (setq i len))
- (setq sha1-data (concat sha1-data (substring bytes 0 i)))
- (setq len (- len i)
- top i)
- (if (eq (length sha1-data) SHA1-BLOCKSIZE)
- (sha1-transform)
- (setq done t)))
- (when (not done)
- (while (and (not done)
- (>= len SHA1-BLOCKSIZE))
- (setq sha1-data (substring bytes top (+ top SHA1-BLOCKSIZE))
- top (+ top SHA1-BLOCKSIZE)
- len (- len SHA1-BLOCKSIZE))
- (sha1-transform))
- (setq sha1-data (substring bytes top (+ top len))))
- ))
-
-(defmacro sha1-FA (n)
- (let ((func (intern (format "sha1-f%d" n)))
- (const (intern (format "sha1-const%d" n))))
- `(setq T (sha1-add (cons 0 0) (sha1-rot-5 A) (,func B C D) E (aref W WIDX)
- ,const)
- WIDX (1+ WIDX)
- B (sha1-rot-30 B))))
-
-(defmacro sha1-FB (n)
- (let ((func (intern (format "sha1-f%d" n)))
- (const (intern (format "sha1-const%d" n))))
- `(setq E (sha1-add (cons 0 0) (sha1-rot-5 T) (,func A B C) D (aref W WIDX)
- ,const)
- WIDX (1+ WIDX)
- A (sha1-rot-30 A))))
-
-(defmacro sha1-FC (n)
- (let ((func (intern (format "sha1-f%d" n)))
- (const (intern (format "sha1-const%d" n))))
- `(setq D (sha1-add (cons 0 0) (sha1-rot-5 E) (,func T A B) C (aref W WIDX)
- ,const)
- WIDX (1+ WIDX)
- T (sha1-rot-30 T))))
-
-(defmacro sha1-FD (n)
- (let ((func (intern (format "sha1-f%d" n)))
- (const (intern (format "sha1-const%d" n))))
- `(setq C (sha1-add (cons 0 0) (sha1-rot-5 D) (,func E T A) B (aref W WIDX)
- ,const)
- WIDX (1+ WIDX)
- E (sha1-rot-30 E))))
-
-(defmacro sha1-FE (n)
- (let ((func (intern (format "sha1-f%d" n)))
- (const (intern (format "sha1-const%d" n))))
- `(setq B (sha1-add (cons 0 0) (sha1-rot-5 C) (,func D E T) A (aref W WIDX)
- ,const)
- WIDX (1+ WIDX)
- D (sha1-rot-30 D))))
-
-(defmacro sha1-FT (n)
- (let ((func (intern (format "sha1-f%d" n)))
- (const (intern (format "sha1-const%d" n))))
- `(setq A (sha1-add (cons 0 0) (sha1-rot-5 B) (,func C D E) T (aref W WIDX)
- ,const)
- WIDX (1+ WIDX)
- C (sha1-rot-30 C))))
-
-(defun sha1-transform ()
- "Basic SHA1 step. Transform sha1-digest based on sha1-data."
- (let ((W (make-vector 80 nil))
- (WIDX 0)
- (bidx 0)
- T A B C D E)
- (while (< WIDX 16)
- (aset W WIDX
- (cons (logior (lsh (aref sha1-data bidx) 8)
- (aref sha1-data (setq bidx (1+ bidx))))
- (logior (lsh (aref sha1-data (setq bidx (1+ bidx))) 8)
- (aref sha1-data (setq bidx (1+ bidx))))))
- (setq bidx (1+ bidx)
- WIDX (1+ WIDX)))
- (while (< WIDX 80)
- (aset W WIDX (cons 0 0))
- (sha1-xor (aref W WIDX)
- (aref W (- WIDX 3)) (aref W (- WIDX 8))
- (aref W (- WIDX 14)) (aref W (- WIDX 16)))
- (aset W WIDX (sha1-rot-1 (aref W WIDX)))
- (setq WIDX (1+ WIDX)))
- (setq A (cons (car (aref sha1-digest 0)) (cdr (aref sha1-digest 0)))
- B (cons (car (aref sha1-digest 1)) (cdr (aref sha1-digest 1)))
- C (cons (car (aref sha1-digest 2)) (cdr (aref sha1-digest 2)))
- D (cons (car (aref sha1-digest 3)) (cdr (aref sha1-digest 3)))
- E (cons (car (aref sha1-digest 4)) (cdr (aref sha1-digest 4)))
- WIDX 0)
-
- (sha1-FA 1) (sha1-FB 1) (sha1-FC 1) (sha1-FD 1) (sha1-FE 1) (sha1-FT 1)
- (sha1-FA 1) (sha1-FB 1) (sha1-FC 1) (sha1-FD 1) (sha1-FE 1) (sha1-FT 1)
- (sha1-FA 1) (sha1-FB 1) (sha1-FC 1) (sha1-FD 1) (sha1-FE 1) (sha1-FT 1)
- (sha1-FA 1) (sha1-FB 1) (sha1-FC 2) (sha1-FD 2) (sha1-FE 2) (sha1-FT 2)
- (sha1-FA 2) (sha1-FB 2) (sha1-FC 2) (sha1-FD 2) (sha1-FE 2) (sha1-FT 2)
- (sha1-FA 2) (sha1-FB 2) (sha1-FC 2) (sha1-FD 2) (sha1-FE 2) (sha1-FT 2)
- (sha1-FA 2) (sha1-FB 2) (sha1-FC 2) (sha1-FD 2) (sha1-FE 3) (sha1-FT 3)
- (sha1-FA 3) (sha1-FB 3) (sha1-FC 3) (sha1-FD 3) (sha1-FE 3) (sha1-FT 3)
- (sha1-FA 3) (sha1-FB 3) (sha1-FC 3) (sha1-FD 3) (sha1-FE 3) (sha1-FT 3)
- (sha1-FA 3) (sha1-FB 3) (sha1-FC 3) (sha1-FD 3) (sha1-FE 3) (sha1-FT 3)
- (sha1-FA 4) (sha1-FB 4) (sha1-FC 4) (sha1-FD 4) (sha1-FE 4) (sha1-FT 4)
- (sha1-FA 4) (sha1-FB 4) (sha1-FC 4) (sha1-FD 4) (sha1-FE 4) (sha1-FT 4)
- (sha1-FA 4) (sha1-FB 4) (sha1-FC 4) (sha1-FD 4) (sha1-FE 4) (sha1-FT 4)
- (sha1-FA 4) (sha1-FB 4)
-
- (sha1-add (aref sha1-digest 0) E)
- (sha1-add (aref sha1-digest 1) T)
- (sha1-add (aref sha1-digest 2) A)
- (sha1-add (aref sha1-digest 3) B)
- (sha1-add (aref sha1-digest 4) C)
- ))
-
-(defun sha1-final (&optional binary)
- "Transform buffered sha1-data and return SHA1 message digest.
-If optional argument BINARY is non-nil, then return binary formed
-string of message digest."
- (let ((count (logand (lsh (cdr sha1-count-lo) -3) 63)))
- (when (< (length sha1-data) SHA1-BLOCKSIZE)
- (setq sha1-data
- (concat sha1-data
- (make-string (- SHA1-BLOCKSIZE (length sha1-data)) 0))))
- (aset sha1-data count 128)
- (setq count (1+ count))
- (if (> count (- SHA1-BLOCKSIZE 8))
- (progn
- (setq sha1-data (concat (substring sha1-data 0 count)
- (make-string (- SHA1-BLOCKSIZE count) 0)))
- (sha1-transform)
- (setq sha1-data (concat (make-string (- SHA1-BLOCKSIZE 8) 0)
- (substring sha1-data -8))))
- (setq sha1-data (concat (substring sha1-data 0 count)
- (make-string (- SHA1-BLOCKSIZE 8 count) 0)
- (substring sha1-data -8))))
- (aset sha1-data 56 (lsh (car sha1-count-hi) -8))
- (aset sha1-data 57 (logand 255 (car sha1-count-hi)))
- (aset sha1-data 58 (lsh (cdr sha1-count-hi) -8))
- (aset sha1-data 59 (logand 255 (cdr sha1-count-hi)))
- (aset sha1-data 60 (lsh (car sha1-count-lo) -8))
- (aset sha1-data 61 (logand 255 (car sha1-count-lo)))
- (aset sha1-data 62 (lsh (cdr sha1-count-lo) -8))
- (aset sha1-data 63 (logand 255 (cdr sha1-count-lo)))
- (sha1-transform)
- (if binary
- (mapconcat
- (lambda (elem)
- (concat (char-to-string (/ (car elem) 256))
- (char-to-string (% (car elem) 256))
- (char-to-string (/ (cdr elem) 256))
- (char-to-string (% (cdr elem) 256))))
- (list (aref sha1-digest 0) (aref sha1-digest 1) (aref sha1-digest 2)
- (aref sha1-digest 3) (aref sha1-digest 4))
- "")
- (format "%04x%04x%04x%04x%04x%04x%04x%04x%04x%04x"
- (car (aref sha1-digest 0)) (cdr (aref sha1-digest 0))
- (car (aref sha1-digest 1)) (cdr (aref sha1-digest 1))
- (car (aref sha1-digest 2)) (cdr (aref sha1-digest 2))
- (car (aref sha1-digest 3)) (cdr (aref sha1-digest 3))
- (car (aref sha1-digest 4)) (cdr (aref sha1-digest 4)))
- )))
-
-(defun sha1-encode (message &optional binary)
- "Encodes MESSAGE using the SHA1 message digest algorithm.
-MESSAGE must be a unibyte-string.
-By default, return a string which formed hex-decimal charcters
-from message digest.
-If optional argument BINARY is non-nil, then return binary formed
-string of message digest."
- (sha1-init)
- (sha1-update message)
- (sha1-final binary))
-
-(defun sha1-encode-binary (message)
- "Encodes MESSAGE using the SHA1 message digest algorithm.
-MESSAGE must be a unibyte-string.
-Return binary formed string of message digest."
- (sha1-encode message 'binary))
-
-(provide 'sha1)
-
-;;; sha1.el ends here
projects / gnus / commitdiff