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Initial public release, which moved to simple-array representation of
working state (md5-regs). This is the first release that doesn't cons for normal operations. Posted on cmucl-help on 2001-11-09.
This commit is contained in:
376
md5.lisp
376
md5.lisp
@ -1,16 +1,20 @@
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(defpackage :MD5 (:use :CL)
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(:export #:+md5-magic-a+ #:+md5-magic-b+ #:+md5-magic-c+ #:+md5-magic-d+
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;; Low-Level functions
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#:md5sum-update #:md5sum-final #:md5sum-checksum
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;; Low-Level functions on character buffers
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#:md5sum-update-char #:md5sum-final-char
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;; Mid-Level functions
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#:make-md5-state #:update-md5-state #:finalize-md5-state
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(:export
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;; Low-Level types and functions
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#:md5-regs #:initial-md5-regs #:md5regs-checksum
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#:update-md5-block #:fill-block #:fill-block-ub8 #:fill-block-char
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;; Mid-Level types and functions
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#:md5-state #:md5-state-p #:make-md5-state
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#:update-md5-state #:finalize-md5-state
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;; High-Level functions on streams/files
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#:md5sum-char-stream #:md5sum-byte-stream #:md5sum-file))
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#:md5sum-stream #:md5sum-file))
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(in-package :MD5)
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(eval-when (:compile-toplevel)
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(defparameter *old-expansion-limit* ext:*inline-expansion-limit*)
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(setq ext:*inline-expansion-limit* (max ext:*inline-expansion-limit* 1000)))
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;;; Section 3.4: Auxilliary functions
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(deftype ub32 () `(unsigned-byte 32))
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@ -84,12 +88,45 @@
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finally
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(return `(progn ,@result))))
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(defun update-md5-block (a b c d block)
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(declare (type ub32 a b c d)
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;; Block-level operations
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(deftype md5-regs () `(simple-array (unsigned-byte 32) (4)))
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(defmacro md5-regs-a (regs)
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`(aref ,regs 0))
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(defmacro md5-regs-b (regs)
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`(aref ,regs 1))
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(defmacro md5-regs-c (regs)
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`(aref ,regs 2))
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(defmacro md5-regs-d (regs)
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`(aref ,regs 3))
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(defconstant +md5-magic-a+ #x67452301)
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(defconstant +md5-magic-b+ #xefcdab89)
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(defconstant +md5-magic-c+ #x98badcfe)
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(defconstant +md5-magic-d+ #x10325476)
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(declaim (inline initial-md5-regs))
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(defun initial-md5-regs ()
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(declare (optimize (speed 3) (safety 0) (space 0) (debug 0)))
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(let ((regs (make-array 4 :element-type '(unsigned-byte 32))))
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(declare (type md5-regs regs))
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(setf (md5-regs-a regs) +md5-magic-a+
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(md5-regs-b regs) +md5-magic-b+
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(md5-regs-c regs) +md5-magic-c+
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(md5-regs-d regs) +md5-magic-d+)
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regs))
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(defun update-md5-block (regs block)
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(declare (type md5-regs regs)
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(type (simple-array ub32 (16)) block)
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(optimize (speed 3) (safety 0) (space 0) (debug 0)))
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(let ((old-a a) (old-b b) (old-c c) (old-d d))
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(declare (type ub32 old-a old-b old-c old-d))
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(let ((a (md5-regs-a regs)) (b (md5-regs-b regs))
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(c (md5-regs-c regs)) (d (md5-regs-d regs)))
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(declare (type ub32 a b c d))
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;; Round 1
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(with-md5-round (f block)
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(A B C D 0 7 1)(D A B C 1 12 2)(C D A B 2 17 3)(B C D A 3 22 4)
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@ -115,21 +152,31 @@
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(A B C D 8 6 57)(D A B C 15 10 58)(C D A B 6 15 59)(B C D A 13 21 60)
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(A B C D 4 6 61)(D A B C 11 10 62)(C D A B 2 15 63)(B C D A 9 21 64))
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;; Update and return
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(values
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(mod32+ old-a a)
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(mod32+ old-b b)
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(mod32+ old-c c)
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(mod32+ old-d d))))
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(setf (md5-regs-a regs) (mod32+ (md5-regs-a regs) a)
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(md5-regs-b regs) (mod32+ (md5-regs-b regs) b)
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(md5-regs-c regs) (mod32+ (md5-regs-c regs) c)
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(md5-regs-d regs) (mod32+ (md5-regs-d regs) d))
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regs))
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(defconstant +md5-magic-a+ #x67452301)
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(defconstant +md5-magic-b+ #xefcdab89)
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(defconstant +md5-magic-c+ #x98badcfe)
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(defconstant +md5-magic-d+ #x10325476)
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;; Low-level drivers
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(declaim (inline fill-block fill-block-char))
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(declaim (inline fill-block fill-block-ub8 fill-block-char))
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(defun fill-block (block buffer offset)
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(declare (type (integer 0 #.(- most-positive-fixnum 64)) offset)
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(type (simple-array ub32 (16)) block)
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(type (simple-array * (*)) buffer)
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(optimize (speed 3) (safety 0) (space 0) (debug 0)))
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#+(and cmu x86)
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(kernel:bit-bash-copy
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buffer (+ (* vm:vector-data-offset vm:word-bits) (* offset vm:byte-bits))
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block (* vm:vector-data-offset vm:word-bits)
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(* 64 vm:byte-bits))
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#-(and cmu x86)
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(etypecase buffer
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((simple-array (unsigned-byte 8) (*))
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(fill-block-ub8 block buffer offset))
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(simple-string
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(fill-block-char block buffer offset))))
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(defun fill-block-ub8 (block buffer offset)
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(declare (type (integer 0 #.(- most-positive-fixnum 64)) offset)
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(type (simple-array ub32 (16)) block)
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(type (simple-array (unsigned-byte 8) (*)) buffer)
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@ -153,12 +200,7 @@
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(aref buffer (+ j 2)) 16)
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(kernel:shift-towards-end
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(aref buffer (+ j 1)) 8)
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(aref buffer j)))
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#+NIL
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(dpb (aref buffer (+ j 3)) (byte 8 24)
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(dpb (aref buffer (+ j 2)) (byte 8 16)
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(dpb (aref buffer (+ j 1)) (byte 8 8)
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(aref buffer j)))))))
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(aref buffer j))))))
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(defun fill-block-char (block buffer offset)
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(declare (type (integer 0 #.(- most-positive-fixnum 64)) offset)
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@ -186,107 +228,32 @@
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(char-code (schar buffer (+ j 1))) 8)
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(char-code (schar buffer j)))))))
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(declaim (inline md5sum-update md5sum-final
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md5sum-update-char md5sum-final-char))
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(defun md5sum-update (a b c d block buffer offset)
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(declaim (inline md5regs-checksum))
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(defun md5regs-checksum (regs)
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(declare (optimize (speed 3) (safety 0) (space 0) (debug 0))
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(type ub32 a b c d)
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(type (integer 0 #.(- most-positive-fixnum 64)) offset)
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(type (simple-array ub32 (16)) block)
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(type (simple-array (unsigned-byte 8) (*)) buffer))
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(fill-block block buffer offset)
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(update-md5-block a b c d block))
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(defun md5sum-final (a b c d block buffer offset bytes total-length)
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(declare (optimize (speed 3) (safety 0) (space 0) (debug 0))
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(type ub32 a b c d)
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(type (unsigned-byte 29) total-length)
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(type (integer 0 #.(- most-positive-fixnum 64)) offset)
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(type (integer 0 63) bytes)
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(type (simple-array ub32 (16)) block)
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(type (simple-array (unsigned-byte 8) (*)) buffer))
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(setf (aref buffer (+ offset bytes)) #x80)
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(loop for index of-type (integer 0 #.most-positive-fixnum)
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from (+ offset bytes 1) to (+ offset 63)
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do (setf (aref buffer index) #x00))
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(fill-block block buffer offset)
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(when (< bytes 56)
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(setf (aref block 14) (* total-length 8)))
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(multiple-value-bind (a b c d)
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(update-md5-block a b c d block)
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(if (< 56 bytes 64)
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(progn
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(loop for index of-type (integer 0 16) from 0 to 15
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do (setf (aref block index) #x00000000))
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(setf (aref block 14) (* total-length 8))
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(update-md5-block a b c d block))
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(values a b c d))))
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(defun md5sum-update-char (a b c d block buffer offset)
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(declare (optimize (speed 3) (safety 0) (space 0) (debug 0))
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(type ub32 a b c d)
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(type (integer 0 #.(- most-positive-fixnum 64)) offset)
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(type (simple-array ub32 (16)) block)
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(type simple-string buffer))
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(fill-block-char block buffer offset)
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(update-md5-block a b c d block))
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(defun md5sum-final-char (a b c d block buffer offset bytes total-length)
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(declare (optimize (speed 3) (safety 0) (space 0) (debug 0))
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(type ub32 a b c d)
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(type (unsigned-byte 29) total-length)
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(type (integer 0 #.(- most-positive-fixnum 64)) offset)
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(type (integer 0 63) bytes)
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(type (simple-array ub32 (16)) block)
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(type simple-string buffer))
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(setf (schar buffer (+ offset bytes)) (code-char #x80))
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(loop for index of-type (integer 0 #.most-positive-fixnum)
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from (+ offset bytes 1) to (+ offset 63)
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do (setf (schar buffer index) (code-char #x00)))
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(fill-block-char block buffer offset)
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(when (< bytes 56)
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(setf (aref block 14) (* total-length 8)))
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(multiple-value-bind (a b c d)
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(update-md5-block a b c d block)
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(if (< 56 bytes 64)
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(progn
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(loop for index of-type (integer 0 16) from 0 to 15
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do (setf (aref block index) #x00000000))
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(setf (aref block 14) (* total-length 8))
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(update-md5-block a b c d block))
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(values a b c d))))
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(defun md5sum-checksum (a b c d)
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(declare (optimize (speed 3) (safety 0) (space 0) (debug 0))
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(type ub32 a b c d))
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(make-array 16 :element-type '(unsigned-byte 8)
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:initial-contents
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(list
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(ldb (byte 8 0) a)
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(ldb (byte 8 8) a)
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(ldb (byte 8 16) a)
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(ldb (byte 8 24) a)
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(ldb (byte 8 0) b)
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(ldb (byte 8 8) b)
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(ldb (byte 8 16) b)
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(ldb (byte 8 24) b)
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(ldb (byte 8 0) c)
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(ldb (byte 8 8) c)
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(ldb (byte 8 16) c)
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(ldb (byte 8 24) c)
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(ldb (byte 8 0) d)
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(ldb (byte 8 8) d)
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(ldb (byte 8 16) d)
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(ldb (byte 8 24) d))))
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(type md5-regs regs))
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(let ((result (make-array 16 :element-type '(unsigned-byte 8))))
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(declare (type (simple-array (unsigned-byte 8) (16)) result))
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(macrolet ((frob (reg offset)
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(let ((var (gensym)))
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`(let ((,var ,reg))
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(declare (type ub32 ,var))
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(setf
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(aref result ,offset) (ldb (byte 8 0) ,var)
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(aref result ,(+ offset 1)) (ldb (byte 8 8) ,var)
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(aref result ,(+ offset 2)) (ldb (byte 8 16) ,var)
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(aref result ,(+ offset 3)) (ldb (byte 8 24) ,var))))))
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(frob (md5-regs-a regs) 0)
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(frob (md5-regs-b regs) 4)
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(frob (md5-regs-c regs) 8)
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(frob (md5-regs-d regs) 12))
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result))
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;; Mid-Level Drivers
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(defstruct (md5-state
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(:constructor make-md5-state ()))
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(a +md5-magic-a+ :type (unsigned-byte 32))
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(b +md5-magic-b+ :type (unsigned-byte 32))
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(c +md5-magic-c+ :type (unsigned-byte 32))
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(d +md5-magic-d+ :type (unsigned-byte 32))
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(regs (initial-md5-regs) :type md5-regs :read-only t)
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(amount 0 :type (unsigned-byte 29))
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(block (make-array 16 :element-type '(unsigned-byte 32)) :read-only t
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:type (simple-array (unsigned-byte 32) (16)))
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@ -298,7 +265,7 @@
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(declaim (inline copy-to-buffer))
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(defun copy-to-buffer (from from-offset count buffer buffer-offset)
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(declare (optimize (speed 3) (safety 0) (space 0) (debug 0))
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(type fixnum from-offset)
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(type (unsigned-byte 29) from-offset)
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(type (integer 0 63) count buffer-offset)
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(type (simple-array * (*)) from)
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(type (simple-array (unsigned-byte 8) (64)) buffer))
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@ -309,31 +276,32 @@
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(* buffer-offset vm:byte-bits))
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(* count vm:byte-bits))
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#-(and cmu x86)
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(if (typep from 'simple-string)
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(etypecase from
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(simple-string
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(loop for buffer-index of-type (integer 0 64) from buffer-offset
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for from-index of-type fixnum from from-offset
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below (+ from-offset count)
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do
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(setf (aref buffer buffer-index)
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(char-code (schar from from-index))))
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(char-code (schar from from-index)))))
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((simple-array (unsigned-byte 8) (*))
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(loop for buffer-index of-type (integer 0 64) from buffer-offset
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for from-index of-type fixnum from from-offset
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below (+ from-offset count)
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do
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(setf (aref buffer buffer-index) (aref from from-index)))))
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(setf (aref buffer buffer-index) (aref from from-index))))))
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(defun update-md5-state (state sequence &key (start 0) (end (length sequence)))
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(declare (type md5-state state)
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(type (simple-array * (*)) sequence)
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(type fixnum start end)
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(optimize (speed 3) (space 0) (debug 0)))
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(let ((a (md5-state-a state)) (b (md5-state-b state))
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(c (md5-state-c state)) (d (md5-state-d state))
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(let ((regs (md5-state-regs state))
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(block (md5-state-block state))
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(buffer (md5-state-buffer state))
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(buffer-index (md5-state-buffer-index state))
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(length (- end start)))
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(declare (type ub32 a b c d) (type fixnum length)
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(declare (type md5-regs regs) (type fixnum length)
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(type (integer 0 63) buffer-index)
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(type (simple-array (unsigned-byte 32) (16)) block)
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(type (simple-array (unsigned-byte 8) (64)) buffer))
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@ -342,9 +310,12 @@
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(let ((amount (min (- 64 buffer-index) length)))
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(declare (type (integer 0 63) amount))
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(copy-to-buffer sequence start amount buffer buffer-index)
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(setq start (the fixnum (+ start amount))))
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(multiple-value-setq (a b c d)
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(md5sum-update a b c d block buffer 0)))
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(setq start (the fixnum (+ start amount)))
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(when (>= start end)
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(setf (md5-state-buffer-index state) (+ buffer-index amount))
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(return-from update-md5-state state)))
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(fill-block-ub8 block buffer 0)
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(update-md5-block regs block))
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;; Handle main-part and new-rest
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(etypecase sequence
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((simple-array (unsigned-byte 8) (*))
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@ -352,8 +323,9 @@
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(declare (type (simple-array (unsigned-byte 8) (*)) sequence))
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(loop for offset of-type (unsigned-byte 29) from start below end by 64
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until (< (- end offset) 64)
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do (multiple-value-setq (a b c d)
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(md5sum-update a b c d block sequence offset))
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do
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(fill-block-ub8 block sequence offset)
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(update-md5-block regs block)
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finally
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(let ((amount (- end offset)))
|
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(unless (zerop amount)
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@ -364,37 +336,46 @@
|
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(declare (type simple-string sequence))
|
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(loop for offset of-type (unsigned-byte 29) from start below end by 64
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until (< (- end offset) 64)
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do (multiple-value-setq (a b c d)
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(md5sum-update-char a b c d block sequence offset))
|
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do
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(fill-block-char block sequence offset)
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(update-md5-block regs block)
|
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finally
|
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(let ((amount (- end offset)))
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(unless (zerop amount)
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(copy-to-buffer sequence offset amount buffer 0))
|
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(setf (md5-state-buffer-index state) amount))))))
|
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(setf (md5-state-a state) a
|
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(md5-state-b state) b
|
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(md5-state-c state) c
|
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(md5-state-d state) d
|
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(md5-state-amount state) (+ (md5-state-amount state) length))
|
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(setf (md5-state-amount state) (+ (md5-state-amount state) length))
|
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state))
|
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|
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(defun finalize-md5-state (state)
|
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(declare (type md5-state state)
|
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(optimize (speed 3) (space 0) (debug 0)))
|
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(or (md5-state-finalized-p state)
|
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(multiple-value-bind (a b c d)
|
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(md5sum-final (md5-state-a state) (md5-state-b state)
|
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(md5-state-c state) (md5-state-d state)
|
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(md5-state-block state)
|
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(md5-state-buffer state)
|
||||
0 (md5-state-buffer-index state)
|
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(md5-state-amount state))
|
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(setf (md5-state-a state) a
|
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(md5-state-b state) b
|
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(md5-state-c state) c
|
||||
(md5-state-d state) d
|
||||
(md5-state-finalized-p state)
|
||||
(md5sum-checksum a b c d)))))
|
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(let ((regs (md5-state-regs state))
|
||||
(block (md5-state-block state))
|
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(buffer (md5-state-buffer state))
|
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(buffer-index (md5-state-buffer-index state))
|
||||
(total-length (md5-state-amount state)))
|
||||
(declare (type md5-regs regs)
|
||||
(type (unsigned-byte 29) total-length)
|
||||
(type (integer 0 63) buffer-index)
|
||||
(type (simple-array ub32 (16)) block)
|
||||
(type (simple-array (unsigned-byte 8) (*)) buffer))
|
||||
(setf (aref buffer buffer-index) #x80)
|
||||
(loop for index of-type (integer 0 64)
|
||||
from (1+ buffer-index) below 64
|
||||
do (setf (aref buffer index) #x00))
|
||||
(fill-block-ub8 block buffer 0)
|
||||
(when (< buffer-index 56)
|
||||
(setf (aref block 14) (* total-length 8)))
|
||||
(update-md5-block regs block)
|
||||
(when (< 56 buffer-index 64)
|
||||
(loop for index of-type (integer 0 16) from 0 below 16
|
||||
do (setf (aref block index) #x00000000))
|
||||
(setf (aref block 14) (* total-length 8))
|
||||
(update-md5-block regs block))
|
||||
(setf (md5-state-finalized-p state)
|
||||
(md5regs-checksum regs)))))
|
||||
|
||||
;; High-Level Drivers
|
||||
|
||||
@ -402,65 +383,36 @@
|
||||
|
||||
(deftype buffer-index () `(integer 0 ,+buffer-size+))
|
||||
|
||||
(defun md5sum-byte-stream (stream)
|
||||
(declare (type stream)
|
||||
(optimize (speed 3) (space 0) (debug 0)))
|
||||
(let ((block (make-array 16 :element-type 'ub32))
|
||||
(buffer (make-array +buffer-size+ :element-type '(unsigned-byte 8)))
|
||||
(length 0)
|
||||
(a +md5-magic-a+) (b +md5-magic-b+)
|
||||
(c +md5-magic-c+) (d +md5-magic-d+))
|
||||
(declare (type ub32 a b c d length)
|
||||
(type (simple-array ub32 (16)) block)
|
||||
(type (simple-array (unsigned-byte 8) (*)) buffer))
|
||||
(defun md5sum-stream (stream)
|
||||
(declare (optimize (speed 3) (space 0) (debug 0)))
|
||||
(let ((state (make-md5-state)))
|
||||
(declare (type md5-state state))
|
||||
(cond
|
||||
((equal (stream-element-type stream) '(unsigned-byte 8))
|
||||
(let ((buffer (make-array +buffer-size+ :element-type '(unsigned-byte 8))))
|
||||
(declare (type (simple-array (unsigned-byte 8) (#.md5::+buffer-size+))
|
||||
buffer))
|
||||
(loop for bytes of-type buffer-index = (read-sequence buffer stream)
|
||||
do
|
||||
(incf length bytes)
|
||||
(loop for offset of-type buffer-index
|
||||
from 0 below +buffer-size+ by 64
|
||||
for rest-size of-type buffer-index = bytes
|
||||
then (- rest-size block-size)
|
||||
for block-size of-type (integer 0 64) = (min 64 rest-size)
|
||||
do
|
||||
(multiple-value-setq (a b c d)
|
||||
(if (< block-size 64)
|
||||
(md5sum-final a b c d block buffer offset
|
||||
block-size length)
|
||||
(md5sum-update a b c d block buffer offset)))
|
||||
until (< block-size 64))
|
||||
do (update-md5-state state buffer :end bytes)
|
||||
until (< bytes +buffer-size+)
|
||||
finally (return (md5sum-checksum a b c d)))))
|
||||
|
||||
(defun md5sum-char-stream (stream)
|
||||
(declare (type stream)
|
||||
(optimize (speed 3) (space 0) (debug 0)))
|
||||
(let ((block (make-array 16 :element-type 'ub32))
|
||||
(buffer (make-string +buffer-size+))
|
||||
(length 0)
|
||||
(a +md5-magic-a+) (b +md5-magic-b+)
|
||||
(c +md5-magic-c+) (d +md5-magic-d+))
|
||||
(declare (type ub32 a b c d length)
|
||||
(type (simple-array ub32 (16)) block)
|
||||
(type simple-string buffer))
|
||||
finally
|
||||
(return (finalize-md5-state state)))))
|
||||
((equal (stream-element-type stream) 'character)
|
||||
(let ((buffer (make-string +buffer-size+)))
|
||||
(declare (type (simple-string #.md5::+buffer-size+) buffer))
|
||||
(loop for bytes of-type buffer-index = (read-sequence buffer stream)
|
||||
do
|
||||
(incf length bytes)
|
||||
(loop for offset of-type buffer-index
|
||||
from 0 below +buffer-size+ by 64
|
||||
for rest-size of-type buffer-index = bytes
|
||||
then (- rest-size block-size)
|
||||
for block-size of-type (integer 0 64) = (min 64 rest-size)
|
||||
do
|
||||
(multiple-value-setq (a b c d)
|
||||
(if (< block-size 64)
|
||||
(md5sum-final-char a b c d block buffer offset
|
||||
block-size length)
|
||||
(md5sum-update-char a b c d block buffer offset)))
|
||||
until (< block-size 64))
|
||||
do (update-md5-state state buffer :end bytes)
|
||||
until (< bytes +buffer-size+)
|
||||
finally (return (md5sum-checksum a b c d)))))
|
||||
finally
|
||||
(return (finalize-md5-state state)))))
|
||||
(t
|
||||
(error "Unsupported stream element-type ~S for stream ~S."
|
||||
(stream-element-type stream) stream)))))
|
||||
|
||||
(defun md5sum-file (pathname)
|
||||
(declare (optimize (speed 3) (space 0) (debug 0)))
|
||||
(with-open-file (stream pathname :element-type '(unsigned-byte 8))
|
||||
(md5sum-byte-stream stream)))
|
||||
(md5sum-stream stream)))
|
||||
|
||||
(eval-when (:compile-toplevel)
|
||||
(setq ext:*inline-expansion-limit* *old-expansion-limit*))
|
||||
|
||||
Reference in New Issue
Block a user