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;       ASM_DEMO.ASM 
;       Assembler Test- and Demoprogram of the Compatibility  
;       (c)1996 Cedric Reinartz 
 
; 	Simple programm which encrypts testdata and compares them with the 
;	values provided by Bruce Schneier 
 
 
 
	nopub	 equ 1			; we want to include BFENG386.ASM 
	useSmall equ 1			; large model not needed 
	noLoop	 equ 0			; we don't need much speed 
	rnds	 equ 1			; 16 Rounds 
 
	include bfe_asm.inc 
 
	.data 
 
key_0	dd 1058 dup(0) 
 
;   official Testvektors from DDJ 10/95...  
PW_1		db "abcdefghijklmnopqrstuvwxyz" 
data1_p 	dd 0424c4f57h, 046495348h 
data1_c 	dd 0324ed0feh, 0f413a203h 
len_PW_1 	equ offset data1_p - offset pw_1 
 
PW_2		db "Who is John Galt?" 
data2_p 	dd 0fedcba98h, 076543210h 
data2_c 	dd 0cc91732bh, 08022f684h 
len_PW_2	equ offset data2_p - PW_2 
 
noerror		db 13,10,10,"Test completed successfully !",13,10,"$" 
error		db 13,10,10,"Test failed !",13,10,"$" 
 
	.code	 
 
start:	_GetBoxPointer				; mov dx,seg key_0 would also do 
	mov	ds,dx				; load the right Datasegment 
 
	_GetBoxes ds, 		; Save original Boxes 
 
	_InitCrypt ds,,len_PW_1	; Set the first Password 
	_Encrypt ds,,8		; Encrypt 8 Byte of Testdata 
	mov	si,offset data1_p		; Compare with 
	call	comp				; official values 
	jne	ko				; Not equal -> Test Failed 
 
	_SetBoxes ds, 		; Restore original Boxes 
 
	_InitCrypt ds,,len_PW_2	; Set the second Password 
	_Encrypt ds,,8		; Encrypt 8 Byte of Testdata 
	mov	si,offset data2_p		; Compare with 
	call	comp				; official values 
	jne	ko				; Not equal -> Test Failed 
 
OK:	mov	dx,offset noerror		; Else: Test completed 
	jmp	finish 
 
KO:	mov	dx,offset error 
 
finish:	mov	ax,0900h			; Show final message 
	int	21h 
	mov	ax,4c00h			; Terminate programm 
	int	21h 
 
comp:	mov	eax,[si]			; Compares two DWords 
	cmp	eax,[si+8]			; with the following 
	jne	c_end				; two DWords 
	mov	eax,[si+4] 
	cmp	eax,[si+12] 
c_end:	ret 
 
	end start