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emacs
emacs
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0cd1fac2
Commit
0cd1fac2
authored
Nov 28, 2007
by
Glenn Morris
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Move here from ../gnus.
parent
4e856ec7
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lisp/net/hmac-def.el
lisp/net/hmac-def.el
+86
-0
lisp/net/hmac-md5.el
lisp/net/hmac-md5.el
+85
-0
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lisp/net/hmac-def.el
0 → 100644
View file @
0cd1fac2
;;; hmac-def.el --- A macro for defining HMAC functions.
;; Copyright (C) 1999, 2001, 2007 Free Software Foundation, Inc.
;; Author: Shuhei KOBAYASHI <shuhei@aqua.ocn.ne.jp>
;; Keywords: HMAC, RFC 2104
;; This file is part of GNU Emacs.
;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 3, or (at your option)
;; any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; This program is implemented from RFC 2104,
;; "HMAC: Keyed-Hashing for Message Authentication".
;;; Code:
(
defmacro
define-hmac-function
(
name
H
B
L
&optional
bit
)
"Define a function NAME(TEXT KEY) which computes HMAC with function H.
HMAC function is H(KEY XOR opad, H(KEY XOR ipad, TEXT)):
H is a cryptographic hash function, such as SHA1 and MD5, which takes
a string and return a digest of it (in binary form).
B is a byte-length of a block size of H. (B=64 for both SHA1 and MD5.)
L is a byte-length of hash outputs. (L=16 for MD5, L=20 for SHA1.)
If BIT is non-nil, truncate output to specified bits."
`
(
defun
,
name
(
text
key
)
,
(
concat
"Compute "
(
upcase
(
symbol-name
name
))
" over TEXT with KEY."
)
(
let
((
key-xor-ipad
(
make-string
,
B
?\x36
))
(
key-xor-opad
(
make-string
,
B
?\x5C
))
(
len
(
length
key
))
(
pos
0
))
(
unwind-protect
(
progn
;; if `key' is longer than the block size, apply hash function
;; to `key' and use the result as a real `key'.
(
if
(
>
len
,
B
)
(
setq
key
(
,
H
key
)
len
,
L
))
(
while
(
<
pos
len
)
(
aset
key-xor-ipad
pos
(
logxor
(
aref
key
pos
)
?\x36
))
(
aset
key-xor-opad
pos
(
logxor
(
aref
key
pos
)
?\x5C
))
(
setq
pos
(
1+
pos
)))
(
setq
key-xor-ipad
(
unwind-protect
(
concat
key-xor-ipad
text
)
(
fillarray
key-xor-ipad
0
))
key-xor-ipad
(
unwind-protect
(
,
H
key-xor-ipad
)
(
fillarray
key-xor-ipad
0
))
key-xor-opad
(
unwind-protect
(
concat
key-xor-opad
key-xor-ipad
)
(
fillarray
key-xor-opad
0
))
key-xor-opad
(
unwind-protect
(
,
H
key-xor-opad
)
(
fillarray
key-xor-opad
0
)))
;; now `key-xor-opad' contains
;; H(KEY XOR opad, H(KEY XOR ipad, TEXT)).
,
(
if
(
and
bit
(
<
(
/
bit
8
)
L
))
`
(
substring
key-xor-opad
0
,
(
/
bit
8
))
;; return a copy of `key-xor-opad'.
`
(
concat
key-xor-opad
)))
;; cleanup.
(
fillarray
key-xor-ipad
0
)
(
fillarray
key-xor-opad
0
)))))
(
provide
'hmac-def
)
;;; arch-tag: 645adcef-b835-4900-a10a-11f636c982b9
;;; hmac-def.el ends here
lisp/net/hmac-md5.el
0 → 100644
View file @
0cd1fac2
;;; hmac-md5.el --- Compute HMAC-MD5.
;; Copyright (C) 1999, 2001, 2007 Free Software Foundation, Inc.
;; Author: Shuhei KOBAYASHI <shuhei@aqua.ocn.ne.jp>
;; Keywords: HMAC, RFC 2104, HMAC-MD5, MD5, KEYED-MD5, CRAM-MD5
;; This file is part of GNU Emacs.
;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 3, or (at your option)
;; any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; Test cases from RFC 2202, "Test Cases for HMAC-MD5 and HMAC-SHA-1".
;;
;; (encode-hex-string (hmac-md5 "Hi There" (make-string 16 ?\x0b)))
;; => "9294727a3638bb1c13f48ef8158bfc9d"
;;
;; (encode-hex-string (hmac-md5 "what do ya want for nothing?" "Jefe"))
;; => "750c783e6ab0b503eaa86e310a5db738"
;;
;; (encode-hex-string (hmac-md5 (make-string 50 ?\xdd) (make-string 16 ?\xaa)))
;; => "56be34521d144c88dbb8c733f0e8b3f6"
;;
;; (encode-hex-string
;; (hmac-md5
;; (make-string 50 ?\xcd)
;; (decode-hex-string "0102030405060708090a0b0c0d0e0f10111213141516171819")))
;; => "697eaf0aca3a3aea3a75164746ffaa79"
;;
;; (encode-hex-string
;; (hmac-md5 "Test With Truncation" (make-string 16 ?\x0c)))
;; => "56461ef2342edc00f9bab995690efd4c"
;;
;; (encode-hex-string
;; (hmac-md5-96 "Test With Truncation" (make-string 16 ?\x0c)))
;; => "56461ef2342edc00f9bab995"
;;
;; (encode-hex-string
;; (hmac-md5
;; "Test Using Larger Than Block-Size Key - Hash Key First"
;; (make-string 80 ?\xaa)))
;; => "6b1ab7fe4bd7bf8f0b62e6ce61b9d0cd"
;;
;; (encode-hex-string
;; (hmac-md5
;; "Test Using Larger Than Block-Size Key and Larger Than One Block-Size Data"
;; (make-string 80 ?\xaa)))
;; => "6f630fad67cda0ee1fb1f562db3aa53e"
;;; Code:
(
eval-when-compile
(
require
'hmac-def
))
(
require
'hex-util
)
; (decode-hex-string STRING)
(
require
'md5
)
; expects (md5 STRING)
(
defun
md5-binary
(
string
)
"Return the MD5 of STRING in binary form."
(
if
(
condition-case
nil
;; `md5' of v21 takes 4th arg CODING (and 5th arg NOERROR).
(
md5
""
nil
nil
'binary
)
; => "d41d8cd98f00b204e9800998ecf8427e"
(
wrong-number-of-arguments
nil
))
(
decode-hex-string
(
md5
string
nil
nil
'binary
))
(
decode-hex-string
(
md5
string
))))
(
define-hmac-function
hmac-md5
md5-binary
64
16
)
; => (hmac-md5 TEXT KEY)
(
define-hmac-function
hmac-md5-96
md5-binary
64
16
96
)
(
provide
'hmac-md5
)
;;; arch-tag: 0ab3f4f6-3d4b-4167-a9fa-635b7fed7f27
;;; hmac-md5.el ends here
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