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|
TITLE rc5-586.asm
IF @Version LT 800
ECHO MASM version 8.00 or later is strongly recommended.
ENDIF
.686
.MODEL FLAT
OPTION DOTNAME
IF @Version LT 800
.text$ SEGMENT PAGE 'CODE'
ELSE
.text$ SEGMENT ALIGN(64) 'CODE'
ENDIF
ALIGN 16
_RC5_32_encrypt PROC PUBLIC
$L_RC5_32_encrypt_begin::
;
push ebp
push esi
push edi
mov edx,DWORD PTR 16[esp]
mov ebp,DWORD PTR 20[esp]
; Load the 2 words
mov edi,DWORD PTR [edx]
mov esi,DWORD PTR 4[edx]
push ebx
mov ebx,DWORD PTR [ebp]
add edi,DWORD PTR 4[ebp]
add esi,DWORD PTR 8[ebp]
xor edi,esi
mov eax,DWORD PTR 12[ebp]
mov ecx,esi
rol edi,cl
add edi,eax
xor esi,edi
mov eax,DWORD PTR 16[ebp]
mov ecx,edi
rol esi,cl
add esi,eax
xor edi,esi
mov eax,DWORD PTR 20[ebp]
mov ecx,esi
rol edi,cl
add edi,eax
xor esi,edi
mov eax,DWORD PTR 24[ebp]
mov ecx,edi
rol esi,cl
add esi,eax
xor edi,esi
mov eax,DWORD PTR 28[ebp]
mov ecx,esi
rol edi,cl
add edi,eax
xor esi,edi
mov eax,DWORD PTR 32[ebp]
mov ecx,edi
rol esi,cl
add esi,eax
xor edi,esi
mov eax,DWORD PTR 36[ebp]
mov ecx,esi
rol edi,cl
add edi,eax
xor esi,edi
mov eax,DWORD PTR 40[ebp]
mov ecx,edi
rol esi,cl
add esi,eax
xor edi,esi
mov eax,DWORD PTR 44[ebp]
mov ecx,esi
rol edi,cl
add edi,eax
xor esi,edi
mov eax,DWORD PTR 48[ebp]
mov ecx,edi
rol esi,cl
add esi,eax
xor edi,esi
mov eax,DWORD PTR 52[ebp]
mov ecx,esi
rol edi,cl
add edi,eax
xor esi,edi
mov eax,DWORD PTR 56[ebp]
mov ecx,edi
rol esi,cl
add esi,eax
xor edi,esi
mov eax,DWORD PTR 60[ebp]
mov ecx,esi
rol edi,cl
add edi,eax
xor esi,edi
mov eax,DWORD PTR 64[ebp]
mov ecx,edi
rol esi,cl
add esi,eax
xor edi,esi
mov eax,DWORD PTR 68[ebp]
mov ecx,esi
rol edi,cl
add edi,eax
xor esi,edi
mov eax,DWORD PTR 72[ebp]
mov ecx,edi
rol esi,cl
add esi,eax
cmp ebx,8
je $L000rc5_exit
xor edi,esi
mov eax,DWORD PTR 76[ebp]
mov ecx,esi
rol edi,cl
add edi,eax
xor esi,edi
mov eax,DWORD PTR 80[ebp]
mov ecx,edi
rol esi,cl
add esi,eax
xor edi,esi
mov eax,DWORD PTR 84[ebp]
mov ecx,esi
rol edi,cl
add edi,eax
xor esi,edi
mov eax,DWORD PTR 88[ebp]
mov ecx,edi
rol esi,cl
add esi,eax
xor edi,esi
mov eax,DWORD PTR 92[ebp]
mov ecx,esi
rol edi,cl
add edi,eax
xor esi,edi
mov eax,DWORD PTR 96[ebp]
mov ecx,edi
rol esi,cl
add esi,eax
xor edi,esi
mov eax,DWORD PTR 100[ebp]
mov ecx,esi
rol edi,cl
add edi,eax
xor esi,edi
mov eax,DWORD PTR 104[ebp]
mov ecx,edi
rol esi,cl
add esi,eax
cmp ebx,12
je $L000rc5_exit
xor edi,esi
mov eax,DWORD PTR 108[ebp]
mov ecx,esi
rol edi,cl
add edi,eax
xor esi,edi
mov eax,DWORD PTR 112[ebp]
mov ecx,edi
rol esi,cl
add esi,eax
xor edi,esi
mov eax,DWORD PTR 116[ebp]
mov ecx,esi
rol edi,cl
add edi,eax
xor esi,edi
mov eax,DWORD PTR 120[ebp]
mov ecx,edi
rol esi,cl
add esi,eax
xor edi,esi
mov eax,DWORD PTR 124[ebp]
mov ecx,esi
rol edi,cl
add edi,eax
xor esi,edi
mov eax,DWORD PTR 128[ebp]
mov ecx,edi
rol esi,cl
add esi,eax
xor edi,esi
mov eax,DWORD PTR 132[ebp]
mov ecx,esi
rol edi,cl
add edi,eax
xor esi,edi
mov eax,DWORD PTR 136[ebp]
mov ecx,edi
rol esi,cl
add esi,eax
$L000rc5_exit:
mov DWORD PTR [edx],edi
mov DWORD PTR 4[edx],esi
pop ebx
pop edi
pop esi
pop ebp
ret
_RC5_32_encrypt ENDP
ALIGN 16
_RC5_32_decrypt PROC PUBLIC
$L_RC5_32_decrypt_begin::
;
push ebp
push esi
push edi
mov edx,DWORD PTR 16[esp]
mov ebp,DWORD PTR 20[esp]
; Load the 2 words
mov edi,DWORD PTR [edx]
mov esi,DWORD PTR 4[edx]
push ebx
mov ebx,DWORD PTR [ebp]
cmp ebx,12
je $L001rc5_dec_12
cmp ebx,8
je $L002rc5_dec_8
mov eax,DWORD PTR 136[ebp]
sub esi,eax
mov ecx,edi
ror esi,cl
xor esi,edi
mov eax,DWORD PTR 132[ebp]
sub edi,eax
mov ecx,esi
ror edi,cl
xor edi,esi
mov eax,DWORD PTR 128[ebp]
sub esi,eax
mov ecx,edi
ror esi,cl
xor esi,edi
mov eax,DWORD PTR 124[ebp]
sub edi,eax
mov ecx,esi
ror edi,cl
xor edi,esi
mov eax,DWORD PTR 120[ebp]
sub esi,eax
mov ecx,edi
ror esi,cl
xor esi,edi
mov eax,DWORD PTR 116[ebp]
sub edi,eax
mov ecx,esi
ror edi,cl
xor edi,esi
mov eax,DWORD PTR 112[ebp]
sub esi,eax
mov ecx,edi
ror esi,cl
xor esi,edi
mov eax,DWORD PTR 108[ebp]
sub edi,eax
mov ecx,esi
ror edi,cl
xor edi,esi
$L001rc5_dec_12:
mov eax,DWORD PTR 104[ebp]
sub esi,eax
mov ecx,edi
ror esi,cl
xor esi,edi
mov eax,DWORD PTR 100[ebp]
sub edi,eax
mov ecx,esi
ror edi,cl
xor edi,esi
mov eax,DWORD PTR 96[ebp]
sub esi,eax
mov ecx,edi
ror esi,cl
xor esi,edi
mov eax,DWORD PTR 92[ebp]
sub edi,eax
mov ecx,esi
ror edi,cl
xor edi,esi
mov eax,DWORD PTR 88[ebp]
sub esi,eax
mov ecx,edi
ror esi,cl
xor esi,edi
mov eax,DWORD PTR 84[ebp]
sub edi,eax
mov ecx,esi
ror edi,cl
xor edi,esi
mov eax,DWORD PTR 80[ebp]
sub esi,eax
mov ecx,edi
ror esi,cl
xor esi,edi
mov eax,DWORD PTR 76[ebp]
sub edi,eax
mov ecx,esi
ror edi,cl
xor edi,esi
$L002rc5_dec_8:
mov eax,DWORD PTR 72[ebp]
sub esi,eax
mov ecx,edi
ror esi,cl
xor esi,edi
mov eax,DWORD PTR 68[ebp]
sub edi,eax
mov ecx,esi
ror edi,cl
xor edi,esi
mov eax,DWORD PTR 64[ebp]
sub esi,eax
mov ecx,edi
ror esi,cl
xor esi,edi
mov eax,DWORD PTR 60[ebp]
sub edi,eax
mov ecx,esi
ror edi,cl
xor edi,esi
mov eax,DWORD PTR 56[ebp]
sub esi,eax
mov ecx,edi
ror esi,cl
xor esi,edi
mov eax,DWORD PTR 52[ebp]
sub edi,eax
mov ecx,esi
ror edi,cl
xor edi,esi
mov eax,DWORD PTR 48[ebp]
sub esi,eax
mov ecx,edi
ror esi,cl
xor esi,edi
mov eax,DWORD PTR 44[ebp]
sub edi,eax
mov ecx,esi
ror edi,cl
xor edi,esi
mov eax,DWORD PTR 40[ebp]
sub esi,eax
mov ecx,edi
ror esi,cl
xor esi,edi
mov eax,DWORD PTR 36[ebp]
sub edi,eax
mov ecx,esi
ror edi,cl
xor edi,esi
mov eax,DWORD PTR 32[ebp]
sub esi,eax
mov ecx,edi
ror esi,cl
xor esi,edi
mov eax,DWORD PTR 28[ebp]
sub edi,eax
mov ecx,esi
ror edi,cl
xor edi,esi
mov eax,DWORD PTR 24[ebp]
sub esi,eax
mov ecx,edi
ror esi,cl
xor esi,edi
mov eax,DWORD PTR 20[ebp]
sub edi,eax
mov ecx,esi
ror edi,cl
xor edi,esi
mov eax,DWORD PTR 16[ebp]
sub esi,eax
mov ecx,edi
ror esi,cl
xor esi,edi
mov eax,DWORD PTR 12[ebp]
sub edi,eax
mov ecx,esi
ror edi,cl
xor edi,esi
sub esi,DWORD PTR 8[ebp]
sub edi,DWORD PTR 4[ebp]
$L003rc5_exit:
mov DWORD PTR [edx],edi
mov DWORD PTR 4[edx],esi
pop ebx
pop edi
pop esi
pop ebp
ret
_RC5_32_decrypt ENDP
ALIGN 16
_RC5_32_cbc_encrypt PROC PUBLIC
$L_RC5_32_cbc_encrypt_begin::
;
push ebp
push ebx
push esi
push edi
mov ebp,DWORD PTR 28[esp]
; getting iv ptr from parameter 4
mov ebx,DWORD PTR 36[esp]
mov esi,DWORD PTR [ebx]
mov edi,DWORD PTR 4[ebx]
push edi
push esi
push edi
push esi
mov ebx,esp
mov esi,DWORD PTR 36[esp]
mov edi,DWORD PTR 40[esp]
; getting encrypt flag from parameter 5
mov ecx,DWORD PTR 56[esp]
; get and push parameter 3
mov eax,DWORD PTR 48[esp]
push eax
push ebx
cmp ecx,0
jz $L004decrypt
and ebp,4294967288
mov eax,DWORD PTR 8[esp]
mov ebx,DWORD PTR 12[esp]
jz $L005encrypt_finish
$L006encrypt_loop:
mov ecx,DWORD PTR [esi]
mov edx,DWORD PTR 4[esi]
xor eax,ecx
xor ebx,edx
mov DWORD PTR 8[esp],eax
mov DWORD PTR 12[esp],ebx
call $L_RC5_32_encrypt_begin
mov eax,DWORD PTR 8[esp]
mov ebx,DWORD PTR 12[esp]
mov DWORD PTR [edi],eax
mov DWORD PTR 4[edi],ebx
add esi,8
add edi,8
sub ebp,8
jnz $L006encrypt_loop
$L005encrypt_finish:
mov ebp,DWORD PTR 52[esp]
and ebp,7
jz $L007finish
call $L008PIC_point
$L008PIC_point:
pop edx
lea ecx,DWORD PTR ($L009cbc_enc_jmp_table-$L008PIC_point)[edx]
mov ebp,DWORD PTR [ebp*4+ecx]
add ebp,edx
xor ecx,ecx
xor edx,edx
jmp ebp
$L010ej7:
mov dh,BYTE PTR 6[esi]
shl edx,8
$L011ej6:
mov dh,BYTE PTR 5[esi]
$L012ej5:
mov dl,BYTE PTR 4[esi]
$L013ej4:
mov ecx,DWORD PTR [esi]
jmp $L014ejend
$L015ej3:
mov ch,BYTE PTR 2[esi]
shl ecx,8
$L016ej2:
mov ch,BYTE PTR 1[esi]
$L017ej1:
mov cl,BYTE PTR [esi]
$L014ejend:
xor eax,ecx
xor ebx,edx
mov DWORD PTR 8[esp],eax
mov DWORD PTR 12[esp],ebx
call $L_RC5_32_encrypt_begin
mov eax,DWORD PTR 8[esp]
mov ebx,DWORD PTR 12[esp]
mov DWORD PTR [edi],eax
mov DWORD PTR 4[edi],ebx
jmp $L007finish
$L004decrypt:
and ebp,4294967288
mov eax,DWORD PTR 16[esp]
mov ebx,DWORD PTR 20[esp]
jz $L018decrypt_finish
$L019decrypt_loop:
mov eax,DWORD PTR [esi]
mov ebx,DWORD PTR 4[esi]
mov DWORD PTR 8[esp],eax
mov DWORD PTR 12[esp],ebx
call $L_RC5_32_decrypt_begin
mov eax,DWORD PTR 8[esp]
mov ebx,DWORD PTR 12[esp]
mov ecx,DWORD PTR 16[esp]
mov edx,DWORD PTR 20[esp]
xor ecx,eax
xor edx,ebx
mov eax,DWORD PTR [esi]
mov ebx,DWORD PTR 4[esi]
mov DWORD PTR [edi],ecx
mov DWORD PTR 4[edi],edx
mov DWORD PTR 16[esp],eax
mov DWORD PTR 20[esp],ebx
add esi,8
add edi,8
sub ebp,8
jnz $L019decrypt_loop
$L018decrypt_finish:
mov ebp,DWORD PTR 52[esp]
and ebp,7
jz $L007finish
mov eax,DWORD PTR [esi]
mov ebx,DWORD PTR 4[esi]
mov DWORD PTR 8[esp],eax
mov DWORD PTR 12[esp],ebx
call $L_RC5_32_decrypt_begin
mov eax,DWORD PTR 8[esp]
mov ebx,DWORD PTR 12[esp]
mov ecx,DWORD PTR 16[esp]
mov edx,DWORD PTR 20[esp]
xor ecx,eax
xor edx,ebx
mov eax,DWORD PTR [esi]
mov ebx,DWORD PTR 4[esi]
$L020dj7:
ror edx,16
mov BYTE PTR 6[edi],dl
shr edx,16
$L021dj6:
mov BYTE PTR 5[edi],dh
$L022dj5:
mov BYTE PTR 4[edi],dl
$L023dj4:
mov DWORD PTR [edi],ecx
jmp $L024djend
$L025dj3:
ror ecx,16
mov BYTE PTR 2[edi],cl
shl ecx,16
$L026dj2:
mov BYTE PTR 1[esi],ch
$L027dj1:
mov BYTE PTR [esi],cl
$L024djend:
jmp $L007finish
$L007finish:
mov ecx,DWORD PTR 60[esp]
add esp,24
mov DWORD PTR [ecx],eax
mov DWORD PTR 4[ecx],ebx
pop edi
pop esi
pop ebx
pop ebp
ret
ALIGN 64
$L009cbc_enc_jmp_table:
DD 0
DD $L017ej1-$L008PIC_point
DD $L016ej2-$L008PIC_point
DD $L015ej3-$L008PIC_point
DD $L013ej4-$L008PIC_point
DD $L012ej5-$L008PIC_point
DD $L011ej6-$L008PIC_point
DD $L010ej7-$L008PIC_point
ALIGN 64
_RC5_32_cbc_encrypt ENDP
.text$ ENDS
END
|
