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240 lines
4.6 KiB
240 lines
4.6 KiB
12 years ago
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TITLE rc4-586.asm
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IF @Version LT 800
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ECHO MASM version 8.00 or later is strongly recommended.
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ENDIF
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.586
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.MODEL FLAT
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OPTION DOTNAME
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IF @Version LT 800
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.text$ SEGMENT PAGE 'CODE'
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ELSE
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.text$ SEGMENT ALIGN(64) 'CODE'
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ENDIF
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ALIGN 16
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_RC4 PROC PUBLIC
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$L_RC4_begin::
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push ebp
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push ebx
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push esi
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push edi
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mov edi,DWORD PTR 20[esp]
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mov edx,DWORD PTR 24[esp]
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mov esi,DWORD PTR 28[esp]
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mov ebp,DWORD PTR 32[esp]
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xor eax,eax
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xor ebx,ebx
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cmp edx,0
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je $L000abort
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mov al,BYTE PTR [edi]
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mov bl,BYTE PTR 4[edi]
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add edi,8
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lea ecx,DWORD PTR [edx*1+esi]
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sub ebp,esi
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mov DWORD PTR 24[esp],ecx
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inc al
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cmp DWORD PTR 256[edi],-1
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je $L001RC4_CHAR
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mov ecx,DWORD PTR [eax*4+edi]
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and edx,-4
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jz $L002loop1
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lea edx,DWORD PTR [edx*1+esi-4]
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mov DWORD PTR 28[esp],edx
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mov DWORD PTR 32[esp],ebp
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ALIGN 16
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$L003loop4:
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add bl,cl
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mov edx,DWORD PTR [ebx*4+edi]
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mov DWORD PTR [ebx*4+edi],ecx
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mov DWORD PTR [eax*4+edi],edx
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add edx,ecx
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inc al
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and edx,255
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mov ecx,DWORD PTR [eax*4+edi]
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mov ebp,DWORD PTR [edx*4+edi]
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add bl,cl
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mov edx,DWORD PTR [ebx*4+edi]
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mov DWORD PTR [ebx*4+edi],ecx
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mov DWORD PTR [eax*4+edi],edx
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add edx,ecx
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inc al
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and edx,255
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ror ebp,8
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mov ecx,DWORD PTR [eax*4+edi]
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or ebp,DWORD PTR [edx*4+edi]
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add bl,cl
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mov edx,DWORD PTR [ebx*4+edi]
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mov DWORD PTR [ebx*4+edi],ecx
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mov DWORD PTR [eax*4+edi],edx
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add edx,ecx
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inc al
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and edx,255
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ror ebp,8
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mov ecx,DWORD PTR [eax*4+edi]
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or ebp,DWORD PTR [edx*4+edi]
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add bl,cl
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mov edx,DWORD PTR [ebx*4+edi]
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mov DWORD PTR [ebx*4+edi],ecx
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mov DWORD PTR [eax*4+edi],edx
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add edx,ecx
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inc al
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and edx,255
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ror ebp,8
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mov ecx,DWORD PTR 32[esp]
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or ebp,DWORD PTR [edx*4+edi]
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ror ebp,8
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xor ebp,DWORD PTR [esi]
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cmp esi,DWORD PTR 28[esp]
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mov DWORD PTR [esi*1+ecx],ebp
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lea esi,DWORD PTR 4[esi]
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mov ecx,DWORD PTR [eax*4+edi]
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jb $L003loop4
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cmp esi,DWORD PTR 24[esp]
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je $L004done
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mov ebp,DWORD PTR 32[esp]
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ALIGN 16
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$L002loop1:
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add bl,cl
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mov edx,DWORD PTR [ebx*4+edi]
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mov DWORD PTR [ebx*4+edi],ecx
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mov DWORD PTR [eax*4+edi],edx
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add edx,ecx
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inc al
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and edx,255
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mov edx,DWORD PTR [edx*4+edi]
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xor dl,BYTE PTR [esi]
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lea esi,DWORD PTR 1[esi]
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mov ecx,DWORD PTR [eax*4+edi]
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cmp esi,DWORD PTR 24[esp]
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mov BYTE PTR [esi*1+ebp-1],dl
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jb $L002loop1
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jmp $L004done
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ALIGN 16
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$L001RC4_CHAR:
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movzx ecx,BYTE PTR [eax*1+edi]
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$L005cloop1:
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add bl,cl
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movzx edx,BYTE PTR [ebx*1+edi]
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mov BYTE PTR [ebx*1+edi],cl
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mov BYTE PTR [eax*1+edi],dl
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add dl,cl
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movzx edx,BYTE PTR [edx*1+edi]
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add al,1
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xor dl,BYTE PTR [esi]
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lea esi,DWORD PTR 1[esi]
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movzx ecx,BYTE PTR [eax*1+edi]
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cmp esi,DWORD PTR 24[esp]
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mov BYTE PTR [esi*1+ebp-1],dl
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jb $L005cloop1
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$L004done:
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dec al
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mov BYTE PTR [edi-4],bl
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mov BYTE PTR [edi-8],al
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$L000abort:
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pop edi
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pop esi
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pop ebx
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pop ebp
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ret
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_RC4 ENDP
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;EXTERN _OPENSSL_ia32cap_P:NEAR
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ALIGN 16
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_RC4_set_key PROC PUBLIC
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$L_RC4_set_key_begin::
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push ebp
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push ebx
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push esi
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push edi
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mov edi,DWORD PTR 20[esp]
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mov ebp,DWORD PTR 24[esp]
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mov esi,DWORD PTR 28[esp]
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lea edx,DWORD PTR _OPENSSL_ia32cap_P
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lea edi,DWORD PTR 8[edi]
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lea esi,DWORD PTR [ebp*1+esi]
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neg ebp
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xor eax,eax
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mov DWORD PTR [edi-4],ebp
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bt DWORD PTR [edx],20
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jc $L006c1stloop
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ALIGN 16
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$L007w1stloop:
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mov DWORD PTR [eax*4+edi],eax
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add al,1
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jnc $L007w1stloop
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xor ecx,ecx
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xor edx,edx
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ALIGN 16
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$L008w2ndloop:
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mov eax,DWORD PTR [ecx*4+edi]
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add dl,BYTE PTR [ebp*1+esi]
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add dl,al
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add ebp,1
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mov ebx,DWORD PTR [edx*4+edi]
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jnz $L009wnowrap
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mov ebp,DWORD PTR [edi-4]
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$L009wnowrap:
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mov DWORD PTR [edx*4+edi],eax
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mov DWORD PTR [ecx*4+edi],ebx
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add cl,1
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jnc $L008w2ndloop
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jmp $L010exit
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ALIGN 16
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$L006c1stloop:
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mov BYTE PTR [eax*1+edi],al
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add al,1
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jnc $L006c1stloop
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xor ecx,ecx
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xor edx,edx
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xor ebx,ebx
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ALIGN 16
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$L011c2ndloop:
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mov al,BYTE PTR [ecx*1+edi]
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add dl,BYTE PTR [ebp*1+esi]
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add dl,al
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add ebp,1
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mov bl,BYTE PTR [edx*1+edi]
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jnz $L012cnowrap
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mov ebp,DWORD PTR [edi-4]
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$L012cnowrap:
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mov BYTE PTR [edx*1+edi],al
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mov BYTE PTR [ecx*1+edi],bl
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add cl,1
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jnc $L011c2ndloop
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mov DWORD PTR 256[edi],-1
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$L010exit:
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xor eax,eax
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mov DWORD PTR [edi-8],eax
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mov DWORD PTR [edi-4],eax
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pop edi
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pop esi
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pop ebx
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pop ebp
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ret
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_RC4_set_key ENDP
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ALIGN 16
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_RC4_options PROC PUBLIC
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$L_RC4_options_begin::
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call $L013pic_point
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$L013pic_point:
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pop eax
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lea eax,DWORD PTR ($L014opts-$L013pic_point)[eax]
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lea edx,DWORD PTR _OPENSSL_ia32cap_P
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bt DWORD PTR [edx],20
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jnc $L015skip
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add eax,12
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$L015skip:
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ret
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ALIGN 64
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$L014opts:
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DB 114,99,52,40,52,120,44,105,110,116,41,0
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DB 114,99,52,40,49,120,44,99,104,97,114,41,0
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DB 82,67,52,32,102,111,114,32,120,56,54,44,32,67,82,89
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DB 80,84,79,71,65,77,83,32,98,121,32,60,97,112,112,114
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DB 111,64,111,112,101,110,115,115,108,46,111,114,103,62,0
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ALIGN 64
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_RC4_options ENDP
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.text$ ENDS
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.bss SEGMENT 'BSS'
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COMM _OPENSSL_ia32cap_P:DWORD
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.bss ENDS
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END
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