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blowfish fixes - 23

This commit is contained in:
erana 2012-01-20 20:55:34 +09:00
parent ac702302f5
commit 86977f6804
1 changed files with 6 additions and 5 deletions
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11
scsh/encryption/blowfish.scm
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@ -1152,14 +1152,15 @@
(+ (vector-ref (blowfish-s2 blowfish-context) 2)
(vector-ref (blowfish-s3 blowfish-context) 3))))
(define (blowfish-F-le x)
(display "F!")
(bitwise-xor (+ (dictionary-ref-with-index (blowfish-s0 blowfish-context) 3)
(dictionary-ref-with-index (blowfish-s1 blowfish-context) 2))
(+ (dictionary-ref (blowfish-s2 blowfish-context) 1)
(dictionary-ref (blowfish-s3 blowfish-context) 0))))
(+ (dictionary-ref-with-index (blowfish-s2 blowfish-context) 1)
(dictionary-ref-with-index (blowfish-s3 blowfish-context) 0))))
(define blowfish-F (if BIG-ENDIAN-HOST blowfish-F-le blowfish-F-be)) ;; FIXME2 default is big endian
(define (blowfish-R bc l r i)
(set! l (bitwise-xor l (dictionary-ref (blowfish-p bc) i)))
(set! l (bitwise-xor l (dictionary-ref-with-index (blowfish-p bc) i)))
(set! r (bitwise-xor r (blowfish-F l))))
;; blowfish-rounds == 16 ->
@ -1172,7 +1173,7 @@
;;(s2 (blowfish-s2 bc))
;;(s3 (blowfish-s3 bc))
)
(display "almost...")
(blowfish-R bc xl xr 0)
(blowfish-R bc xr xl 1)
(blowfish-R bc xl xr 2)
@ -1189,7 +1190,7 @@
(blowfish-R bc xr xl 13)
(blowfish-R bc xl xr 14)
(blowfish-R bc xr xl 15)
(display "almost...")
(let ((xl (bitwise-xor xl (dictionary-ref-with-index (blowfish-p bc) blowfish-rounds)))
(xr (bitwise-xor xr (dictionary-ref-with-index (blowfish-p bc) (+ blowfish-rounds 1)))))
(set! ret_xl xr)