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;;;; ripemd-160.lisp -- the RIPEMD-160 digest function
(in-package :crypto)
(defstruct (ripemd-160-regs
(:type (vector (unsigned-byte 32)))
(:constructor initial-ripemd-160-regs)
(:copier %copy-ripemd-160-regs))
(a #x67452301)
(b #xefcdab89)
(c #x98badcfe)
(d #x10325476)
(e #xc3d2e1f0))
(deftype ripemd-160-regs () '(simple-array (unsigned-byte 32) (5)))
(defun update-ripemd-160-block (regs block)
(declare (type ripemd-160-regs regs)
(type (simple-array (unsigned-byte 32) (16)) block)
(optimize (speed 3) (safety 0) (space 0) (debug 0)))
(let* ((a1 (ripemd-160-regs-a regs)) (a2 a1)
(b1 (ripemd-160-regs-b regs)) (b2 b1)
(c1 (ripemd-160-regs-c regs)) (c2 c1)
(d1 (ripemd-160-regs-d regs)) (d2 d1)
(e1 (ripemd-160-regs-e regs)) (e2 e1))
(declare (type (unsigned-byte 32) a1 a2 b1 b2 c1 c2 d1 d2 e1 e2))
(flet ((f (x y z)
(declare (type (unsigned-byte 32) x y z))
(ldb (byte 32 0) (logxor x y z)))
(g (x y z)
(declare (type (unsigned-byte 32) x y z))
(ldb (byte 32 0) (logxor z (logand x (logxor y z)))))
(h (x y z)
(declare (type (unsigned-byte 32) x y z))
(ldb (byte 32 0) (logxor z (logior x (lognot y)))))
(i (x y z)
(declare (type (unsigned-byte 32) x y z))
(ldb (byte 32 0) (logxor y (logand z (logxor x y)))))
(j (x y z)
(declare (type (unsigned-byte 32) x y z))
(ldb (byte 32 0) (logxor x (logior y (lognot z))))))
(declare (inline f g h i j))
(macrolet ((subround (func a b c d e x s k)
`(progn
(setf ,a (mod32+ ,a
(mod32+ (funcall (function ,func) ,b ,c ,d)
(mod32+ ,x ,k))))
(setf ,a (mod32+ (rol32 ,a ,s) ,e))
(setf ,c (rol32 ,c 10))))
(with-ripemd-round ((block func constant) &rest clauses)
(loop for (a b c d e i s) in clauses
collect `(subround ,func ,a ,b ,c ,d ,e (aref ,block ,i)
,s ,constant)
into result
finally (return `(progn ,@result)))))
(with-ripemd-round (block f 0)
(a1 b1 c1 d1 e1 0 11) (e1 a1 b1 c1 d1 1 14)
(d1 e1 a1 b1 c1 2 15) (c1 d1 e1 a1 b1 3 12)
(b1 c1 d1 e1 a1 4 5) (a1 b1 c1 d1 e1 5 8)
(e1 a1 b1 c1 d1 6 7) (d1 e1 a1 b1 c1 7 9)
(c1 d1 e1 a1 b1 8 11) (b1 c1 d1 e1 a1 9 13)
(a1 b1 c1 d1 e1 10 14) (e1 a1 b1 c1 d1 11 15)
(d1 e1 a1 b1 c1 12 6) (c1 d1 e1 a1 b1 13 7)
(b1 c1 d1 e1 a1 14 9) (a1 b1 c1 d1 e1 15 8))
(with-ripemd-round (block g #x5a827999)
(e1 a1 b1 c1 d1 7 7) (d1 e1 a1 b1 c1 4 6)
(c1 d1 e1 a1 b1 13 8) (b1 c1 d1 e1 a1 1 13)
(a1 b1 c1 d1 e1 10 11) (e1 a1 b1 c1 d1 6 9)
(d1 e1 a1 b1 c1 15 7) (c1 d1 e1 a1 b1 3 15)
(b1 c1 d1 e1 a1 12 7) (a1 b1 c1 d1 e1 0 12)
(e1 a1 b1 c1 d1 9 15) (d1 e1 a1 b1 c1 5 9)
(c1 d1 e1 a1 b1 2 11) (b1 c1 d1 e1 a1 14 7)
(a1 b1 c1 d1 e1 11 13) (e1 a1 b1 c1 d1 8 12))
(with-ripemd-round (block h #x6ed9eba1)
(d1 e1 a1 b1 c1 3 11) (c1 d1 e1 a1 b1 10 13)
(b1 c1 d1 e1 a1 14 6) (a1 b1 c1 d1 e1 4 7)
(e1 a1 b1 c1 d1 9 14) (d1 e1 a1 b1 c1 15 9)
(c1 d1 e1 a1 b1 8 13) (b1 c1 d1 e1 a1 1 15)
(a1 b1 c1 d1 e1 2 14) (e1 a1 b1 c1 d1 7 8)
(d1 e1 a1 b1 c1 0 13) (c1 d1 e1 a1 b1 6 6)
(b1 c1 d1 e1 a1 13 5) (a1 b1 c1 d1 e1 11 12)
(e1 a1 b1 c1 d1 5 7) (d1 e1 a1 b1 c1 12 5))
(with-ripemd-round (block i #x8f1bbcdc)
(c1 d1 e1 a1 b1 1 11) (b1 c1 d1 e1 a1 9 12)
(a1 b1 c1 d1 e1 11 14) (e1 a1 b1 c1 d1 10 15)
(d1 e1 a1 b1 c1 0 14) (c1 d1 e1 a1 b1 8 15)
(b1 c1 d1 e1 a1 12 9) (a1 b1 c1 d1 e1 4 8)
(e1 a1 b1 c1 d1 13 9) (d1 e1 a1 b1 c1 3 14)
(c1 d1 e1 a1 b1 7 5) (b1 c1 d1 e1 a1 15 6)
(a1 b1 c1 d1 e1 14 8) (e1 a1 b1 c1 d1 5 6)
(d1 e1 a1 b1 c1 6 5) (c1 d1 e1 a1 b1 2 12))
(with-ripemd-round (block j #xa953fd4e)
(b1 c1 d1 e1 a1 4 9) (a1 b1 c1 d1 e1 0 15)
(e1 a1 b1 c1 d1 5 5) (d1 e1 a1 b1 c1 9 11)
(c1 d1 e1 a1 b1 7 6) (b1 c1 d1 e1 a1 12 8)
(a1 b1 c1 d1 e1 2 13) (e1 a1 b1 c1 d1 10 12)
(d1 e1 a1 b1 c1 14 5) (c1 d1 e1 a1 b1 1 12)
(b1 c1 d1 e1 a1 3 13) (a1 b1 c1 d1 e1 8 14)
(e1 a1 b1 c1 d1 11 11) (d1 e1 a1 b1 c1 6 8)
(c1 d1 e1 a1 b1 15 5) (b1 c1 d1 e1 a1 13 6))
(with-ripemd-round (block j #x50a28be6)
(a2 b2 c2 d2 e2 5 8) (e2 a2 b2 c2 d2 14 9)
(d2 e2 a2 b2 c2 7 9) (c2 d2 e2 a2 b2 0 11)
(b2 c2 d2 e2 a2 9 13) (a2 b2 c2 d2 e2 2 15)
(e2 a2 b2 c2 d2 11 15) (d2 e2 a2 b2 c2 4 5)
(c2 d2 e2 a2 b2 13 7) (b2 c2 d2 e2 a2 6 7)
(a2 b2 c2 d2 e2 15 8) (e2 a2 b2 c2 d2 8 11)
(d2 e2 a2 b2 c2 1 14) (c2 d2 e2 a2 b2 10 14)
(b2 c2 d2 e2 a2 3 12) (a2 b2 c2 d2 e2 12 6))
(with-ripemd-round (block i #x5c4dd124)
(e2 a2 b2 c2 d2 6 9) (d2 e2 a2 b2 c2 11 13)
(c2 d2 e2 a2 b2 3 15) (b2 c2 d2 e2 a2 7 7)
(a2 b2 c2 d2 e2 0 12) (e2 a2 b2 c2 d2 13 8)
(d2 e2 a2 b2 c2 5 9) (c2 d2 e2 a2 b2 10 11)
(b2 c2 d2 e2 a2 14 7) (a2 b2 c2 d2 e2 15 7)
(e2 a2 b2 c2 d2 8 12) (d2 e2 a2 b2 c2 12 7)
(c2 d2 e2 a2 b2 4 6) (b2 c2 d2 e2 a2 9 15)
(a2 b2 c2 d2 e2 1 13) (e2 a2 b2 c2 d2 2 11))
(with-ripemd-round (block h #x6d703ef3)
(d2 e2 a2 b2 c2 15 9) (c2 d2 e2 a2 b2 5 7)
(b2 c2 d2 e2 a2 1 15) (a2 b2 c2 d2 e2 3 11)
(e2 a2 b2 c2 d2 7 8) (d2 e2 a2 b2 c2 14 6)
(c2 d2 e2 a2 b2 6 6) (b2 c2 d2 e2 a2 9 14)
(a2 b2 c2 d2 e2 11 12) (e2 a2 b2 c2 d2 8 13)
(d2 e2 a2 b2 c2 12 5) (c2 d2 e2 a2 b2 2 14)
(b2 c2 d2 e2 a2 10 13) (a2 b2 c2 d2 e2 0 13)
(e2 a2 b2 c2 d2 4 7) (d2 e2 a2 b2 c2 13 5))
(with-ripemd-round (block g #x7a6d76e9)
(c2 d2 e2 a2 b2 8 15) (b2 c2 d2 e2 a2 6 5)
(a2 b2 c2 d2 e2 4 8) (e2 a2 b2 c2 d2 1 11)
(d2 e2 a2 b2 c2 3 14) (c2 d2 e2 a2 b2 11 14)
(b2 c2 d2 e2 a2 15 6) (a2 b2 c2 d2 e2 0 14)
(e2 a2 b2 c2 d2 5 6) (d2 e2 a2 b2 c2 12 9)
(c2 d2 e2 a2 b2 2 12) (b2 c2 d2 e2 a2 13 9)
(a2 b2 c2 d2 e2 9 12) (e2 a2 b2 c2 d2 7 5)
(d2 e2 a2 b2 c2 10 15) (c2 d2 e2 a2 b2 14 8))
(with-ripemd-round (block f 0)
(b2 c2 d2 e2 a2 12 8) (a2 b2 c2 d2 e2 15 5)
(e2 a2 b2 c2 d2 10 12) (d2 e2 a2 b2 c2 4 9)
(c2 d2 e2 a2 b2 1 12) (b2 c2 d2 e2 a2 5 5)
(a2 b2 c2 d2 e2 8 14) (e2 a2 b2 c2 d2 7 6)
(d2 e2 a2 b2 c2 6 8) (c2 d2 e2 a2 b2 2 13)
(b2 c2 d2 e2 a2 13 6) (a2 b2 c2 d2 e2 14 5)
(e2 a2 b2 c2 d2 0 15) (d2 e2 a2 b2 c2 3 13)
(c2 d2 e2 a2 b2 9 11) (b2 c2 d2 e2 a2 11 11))
(setf c1 (mod32+ (ripemd-160-regs-b regs) (mod32+ c1 d2))
(ripemd-160-regs-b regs) (mod32+ (ripemd-160-regs-c regs) (mod32+ d1 e2))
(ripemd-160-regs-c regs) (mod32+ (ripemd-160-regs-d regs) (mod32+ e1 a2))
(ripemd-160-regs-d regs) (mod32+ (ripemd-160-regs-e regs) (mod32+ a1 b2))
(ripemd-160-regs-e regs) (mod32+ (ripemd-160-regs-a regs) (mod32+ b1 c2))
(ripemd-160-regs-a regs) c1)
regs))))
(declaim (inline ripemd-160-regs-digest))
(defun ripemd-160-regs-digest (regs)
"Create the final 16 byte message-digest from the RIPEMD-160 working state
in regs. Returns a (simple-array (unsigned-byte 8) (16))."
(declare (optimize (speed 3) (safety 0) (space 0) (debug 0))
(type ripemd-160-regs regs))
(let ((result (make-array 20 :element-type '(unsigned-byte 8))))
(declare (type (simple-array (unsigned-byte 8) (20)) result))
(macrolet ((frob (reg offset)
(let ((var (gensym)))
`(let ((,var ,reg))
(declare (type (unsigned-byte 32) ,var))
(setf
(aref result ,offset) (first-byte ,var)
(aref result ,(+ offset 1)) (second-byte ,var)
(aref result ,(+ offset 2)) (third-byte ,var)
(aref result ,(+ offset 3)) (fourth-byte ,var))))))
(frob (ripemd-160-regs-a regs) 0)
(frob (ripemd-160-regs-b regs) 4)
(frob (ripemd-160-regs-c regs) 8)
(frob (ripemd-160-regs-d regs) 12)
(frob (ripemd-160-regs-e regs) 16))
result))
(defstruct (ripemd-160-state
(:constructor make-ripemd-160-state ())
(:constructor %make-ripemd-160-state (regs amount block buffer buffer-index finalized-p))
(:copier nil))
(regs (initial-ripemd-160-regs) :type ripemd-160-regs :read-only t)
(amount 0 :type (integer 0 *))
(block (make-array 16 :element-type '(unsigned-byte 32)) :read-only t
:type (simple-array (unsigned-byte 32) (16)))
(buffer (make-array 64 :element-type '(unsigned-byte 8)) :read-only t
:type (simple-array (unsigned-byte 8) (64)))
(buffer-index 0 :type (integer 0 63))
(finalized-p nil))
(defun copy-ripemd-160-state (state)
(declare (type ripemd-160-state state))
(%make-ripemd-160-state (%copy-ripemd-160-regs (ripemd-160-state-regs state))
(ripemd-160-state-amount state)
(copy-seq (ripemd-160-state-block state))
(copy-seq (ripemd-160-state-buffer state))
(ripemd-160-state-buffer-index state)
(when (ripemd-160-state-finalized-p state)
(copy-seq (ripemd-160-state-finalized-p state)))))
(defun update-ripemd-160-state (state sequence &key (start 0) (end (length sequence)))
"Update the given ripemd-160-state from sequence, which is either a
simple-string or a simple-array with element-type (unsigned-byte 8),
bounded by start and end, which must be numeric bounding-indices."
(declare (type ripemd-160-state state)
(type (simple-array (unsigned-byte 8) (*)) sequence)
(type fixnum start end)
(optimize (speed 3) #+(or cmu sbcl) (safety 0) (space 0) (debug 0))
#+cmu
(ext:optimize-interface (safety 1) (debug 1)))
(let ((regs (ripemd-160-state-regs state))
(block (ripemd-160-state-block state))
(buffer (ripemd-160-state-buffer state))
(buffer-index (ripemd-160-state-buffer-index state))
(length (- end start)))
(declare (type ripemd-160-regs regs) (type fixnum length)
(type (integer 0 63) buffer-index)
(type (simple-array (unsigned-byte 32) (16)) block)
(type (simple-array (unsigned-byte 8) (64)) buffer))
;; Handle old rest
(unless (zerop buffer-index)
(let ((amount (min (- 64 buffer-index) length)))
(declare (type (integer 0 63) amount))
(copy-to-buffer sequence start amount buffer buffer-index)
(setq start (the fixnum (+ start amount)))
(let ((new-index (mod (+ buffer-index amount) 64)))
(when (zerop new-index)
(fill-block-ub8-le block buffer 0)
(update-ripemd-160-block regs block))
(when (>= start end)
(setf (ripemd-160-state-buffer-index state) new-index)
(incf (ripemd-160-state-amount state) length)
(return-from update-ripemd-160-state state)))))
(loop for offset of-type (unsigned-byte 29) from start below end by 64
until (< (- end offset) 64)
do
(fill-block-ub8-le block sequence offset)
(update-ripemd-160-block regs block)
finally
(let ((amount (- end offset)))
(unless (zerop amount)
(copy-to-buffer sequence offset amount buffer 0))
(setf (ripemd-160-state-buffer-index state) amount)))
(incf (ripemd-160-state-amount state) length)
state))
(defun finalize-ripemd-160-state (state)
"If the given ripemd-160-state has not already been finalized, finalize it,
by processing any remaining input in its buffer, with suitable padding
and appended bit-length, as specified by the RIPEMD-160 standard.
The resulting RIPEMD-160 message-digest is returned as an array of twenty
(unsigned-byte 8) values. Calling `update-ripemd-160-state' after a call to
`finalize-ripemd-160-state' results in unspecified behaviour."
(declare (type ripemd-160-state state)
(optimize (speed 3) #+(or cmu sbcl) (safety 0) (space 0) (debug 0))
#+cmu
(ext:optimize-interface (safety 1) (debug 1)))
(or (ripemd-160-state-finalized-p state)
(let ((regs (ripemd-160-state-regs state))
(block (ripemd-160-state-block state))
(buffer (ripemd-160-state-buffer state))
(buffer-index (ripemd-160-state-buffer-index state))
(total-length (* 8 (ripemd-160-state-amount state))))
(declare (type ripemd-160-regs regs)
(type (integer 0 63) buffer-index)
(type (simple-array (unsigned-byte 32) (16)) block)
(type (simple-array (unsigned-byte 8) (*)) buffer))
;; Add mandatory bit 1 padding
(setf (aref buffer buffer-index) #x80)
;; Fill with 0 bit padding
(loop for index of-type (integer 0 64)
from (1+ buffer-index) below 64
do (setf (aref buffer index) #x00))
(fill-block-ub8-le block buffer 0)
;; Flush block first if length wouldn't fit
(when (>= buffer-index 56)
(update-ripemd-160-block regs block)
;; Create new fully 0 padded block
(loop for index of-type (integer 0 16) from 0 below 16
do (setf (aref block index) #x00000000)))
;; Add 64bit message bit length
(setf (aref block 14) (ldb (byte 32 0) total-length))
(setf (aref block 15) (ldb (byte 32 32) total-length))
;; Flush last block
(update-ripemd-160-block regs block)
;; Done, remember digest for later calls
(setf (ripemd-160-state-finalized-p state)
(ripemd-160-regs-digest regs)))))
(defdigest ripemd-160
(:digest-length 20)
(:state-type ripemd-160-state)
(:creation-function make-ripemd-160-state)
(:copy-function copy-ripemd-160-state)
(:update-function update-ripemd-160-state)
(:finalize-function finalize-ripemd-160-state))
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