| TITLE cast-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 |
| EXTERN _CAST_S_table0:NEAR |
| EXTERN _CAST_S_table1:NEAR |
| EXTERN _CAST_S_table2:NEAR |
| EXTERN _CAST_S_table3:NEAR |
| ALIGN 16 |
| _CAST_encrypt PROC PUBLIC |
| $L_CAST_encrypt_begin:: |
| ; |
| |
| push ebp |
| push ebx |
| mov ebx,DWORD PTR 12[esp] |
| mov ebp,DWORD PTR 16[esp] |
| push esi |
| push edi |
| ; Load the 2 words |
| mov edi,DWORD PTR [ebx] |
| mov esi,DWORD PTR 4[ebx] |
| ; Get short key flag |
| mov eax,DWORD PTR 128[ebp] |
| push eax |
| xor eax,eax |
| ; round 0 |
| mov edx,DWORD PTR [ebp] |
| mov ecx,DWORD PTR 4[ebp] |
| add edx,esi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| xor ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| sub ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| add ecx,ebx |
| xor edi,ecx |
| ; round 1 |
| mov edx,DWORD PTR 8[ebp] |
| mov ecx,DWORD PTR 12[ebp] |
| xor edx,edi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| sub ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| add ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| xor ecx,ebx |
| xor esi,ecx |
| ; round 2 |
| mov edx,DWORD PTR 16[ebp] |
| mov ecx,DWORD PTR 20[ebp] |
| sub edx,esi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| add ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| xor ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| sub ecx,ebx |
| xor edi,ecx |
| ; round 3 |
| mov edx,DWORD PTR 24[ebp] |
| mov ecx,DWORD PTR 28[ebp] |
| add edx,edi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| xor ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| sub ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| add ecx,ebx |
| xor esi,ecx |
| ; round 4 |
| mov edx,DWORD PTR 32[ebp] |
| mov ecx,DWORD PTR 36[ebp] |
| xor edx,esi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| sub ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| add ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| xor ecx,ebx |
| xor edi,ecx |
| ; round 5 |
| mov edx,DWORD PTR 40[ebp] |
| mov ecx,DWORD PTR 44[ebp] |
| sub edx,edi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| add ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| xor ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| sub ecx,ebx |
| xor esi,ecx |
| ; round 6 |
| mov edx,DWORD PTR 48[ebp] |
| mov ecx,DWORD PTR 52[ebp] |
| add edx,esi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| xor ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| sub ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| add ecx,ebx |
| xor edi,ecx |
| ; round 7 |
| mov edx,DWORD PTR 56[ebp] |
| mov ecx,DWORD PTR 60[ebp] |
| xor edx,edi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| sub ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| add ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| xor ecx,ebx |
| xor esi,ecx |
| ; round 8 |
| mov edx,DWORD PTR 64[ebp] |
| mov ecx,DWORD PTR 68[ebp] |
| sub edx,esi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| add ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| xor ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| sub ecx,ebx |
| xor edi,ecx |
| ; round 9 |
| mov edx,DWORD PTR 72[ebp] |
| mov ecx,DWORD PTR 76[ebp] |
| add edx,edi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| xor ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| sub ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| add ecx,ebx |
| xor esi,ecx |
| ; round 10 |
| mov edx,DWORD PTR 80[ebp] |
| mov ecx,DWORD PTR 84[ebp] |
| xor edx,esi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| sub ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| add ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| xor ecx,ebx |
| xor edi,ecx |
| ; round 11 |
| mov edx,DWORD PTR 88[ebp] |
| mov ecx,DWORD PTR 92[ebp] |
| sub edx,edi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| add ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| xor ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| sub ecx,ebx |
| xor esi,ecx |
| ; test short key flag |
| pop edx |
| or edx,edx |
| jnz $L000cast_enc_done |
| ; round 12 |
| mov edx,DWORD PTR 96[ebp] |
| mov ecx,DWORD PTR 100[ebp] |
| add edx,esi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| xor ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| sub ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| add ecx,ebx |
| xor edi,ecx |
| ; round 13 |
| mov edx,DWORD PTR 104[ebp] |
| mov ecx,DWORD PTR 108[ebp] |
| xor edx,edi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| sub ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| add ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| xor ecx,ebx |
| xor esi,ecx |
| ; round 14 |
| mov edx,DWORD PTR 112[ebp] |
| mov ecx,DWORD PTR 116[ebp] |
| sub edx,esi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| add ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| xor ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| sub ecx,ebx |
| xor edi,ecx |
| ; round 15 |
| mov edx,DWORD PTR 120[ebp] |
| mov ecx,DWORD PTR 124[ebp] |
| add edx,edi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| xor ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| sub ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| add ecx,ebx |
| xor esi,ecx |
| $L000cast_enc_done: |
| nop |
| mov eax,DWORD PTR 20[esp] |
| mov DWORD PTR 4[eax],edi |
| mov DWORD PTR [eax],esi |
| pop edi |
| pop esi |
| pop ebx |
| pop ebp |
| ret |
| _CAST_encrypt ENDP |
| EXTERN _CAST_S_table0:NEAR |
| EXTERN _CAST_S_table1:NEAR |
| EXTERN _CAST_S_table2:NEAR |
| EXTERN _CAST_S_table3:NEAR |
| ALIGN 16 |
| _CAST_decrypt PROC PUBLIC |
| $L_CAST_decrypt_begin:: |
| ; |
| |
| push ebp |
| push ebx |
| mov ebx,DWORD PTR 12[esp] |
| mov ebp,DWORD PTR 16[esp] |
| push esi |
| push edi |
| ; Load the 2 words |
| mov edi,DWORD PTR [ebx] |
| mov esi,DWORD PTR 4[ebx] |
| ; Get short key flag |
| mov eax,DWORD PTR 128[ebp] |
| or eax,eax |
| jnz $L001cast_dec_skip |
| xor eax,eax |
| ; round 15 |
| mov edx,DWORD PTR 120[ebp] |
| mov ecx,DWORD PTR 124[ebp] |
| add edx,esi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| xor ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| sub ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| add ecx,ebx |
| xor edi,ecx |
| ; round 14 |
| mov edx,DWORD PTR 112[ebp] |
| mov ecx,DWORD PTR 116[ebp] |
| sub edx,edi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| add ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| xor ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| sub ecx,ebx |
| xor esi,ecx |
| ; round 13 |
| mov edx,DWORD PTR 104[ebp] |
| mov ecx,DWORD PTR 108[ebp] |
| xor edx,esi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| sub ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| add ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| xor ecx,ebx |
| xor edi,ecx |
| ; round 12 |
| mov edx,DWORD PTR 96[ebp] |
| mov ecx,DWORD PTR 100[ebp] |
| add edx,edi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| xor ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| sub ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| add ecx,ebx |
| xor esi,ecx |
| $L001cast_dec_skip: |
| ; round 11 |
| mov edx,DWORD PTR 88[ebp] |
| mov ecx,DWORD PTR 92[ebp] |
| sub edx,esi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| add ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| xor ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| sub ecx,ebx |
| xor edi,ecx |
| ; round 10 |
| mov edx,DWORD PTR 80[ebp] |
| mov ecx,DWORD PTR 84[ebp] |
| xor edx,edi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| sub ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| add ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| xor ecx,ebx |
| xor esi,ecx |
| ; round 9 |
| mov edx,DWORD PTR 72[ebp] |
| mov ecx,DWORD PTR 76[ebp] |
| add edx,esi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| xor ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| sub ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| add ecx,ebx |
| xor edi,ecx |
| ; round 8 |
| mov edx,DWORD PTR 64[ebp] |
| mov ecx,DWORD PTR 68[ebp] |
| sub edx,edi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| add ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| xor ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| sub ecx,ebx |
| xor esi,ecx |
| ; round 7 |
| mov edx,DWORD PTR 56[ebp] |
| mov ecx,DWORD PTR 60[ebp] |
| xor edx,esi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| sub ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| add ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| xor ecx,ebx |
| xor edi,ecx |
| ; round 6 |
| mov edx,DWORD PTR 48[ebp] |
| mov ecx,DWORD PTR 52[ebp] |
| add edx,edi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| xor ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| sub ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| add ecx,ebx |
| xor esi,ecx |
| ; round 5 |
| mov edx,DWORD PTR 40[ebp] |
| mov ecx,DWORD PTR 44[ebp] |
| sub edx,esi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| add ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| xor ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| sub ecx,ebx |
| xor edi,ecx |
| ; round 4 |
| mov edx,DWORD PTR 32[ebp] |
| mov ecx,DWORD PTR 36[ebp] |
| xor edx,edi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| sub ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| add ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| xor ecx,ebx |
| xor esi,ecx |
| ; round 3 |
| mov edx,DWORD PTR 24[ebp] |
| mov ecx,DWORD PTR 28[ebp] |
| add edx,esi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| xor ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| sub ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| add ecx,ebx |
| xor edi,ecx |
| ; round 2 |
| mov edx,DWORD PTR 16[ebp] |
| mov ecx,DWORD PTR 20[ebp] |
| sub edx,edi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| add ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| xor ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| sub ecx,ebx |
| xor esi,ecx |
| ; round 1 |
| mov edx,DWORD PTR 8[ebp] |
| mov ecx,DWORD PTR 12[ebp] |
| xor edx,esi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| sub ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| add ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| xor ecx,ebx |
| xor edi,ecx |
| ; round 0 |
| mov edx,DWORD PTR [ebp] |
| mov ecx,DWORD PTR 4[ebp] |
| add edx,edi |
| rol edx,cl |
| mov ebx,edx |
| xor ecx,ecx |
| mov cl,dh |
| and ebx,255 |
| shr edx,16 |
| xor eax,eax |
| mov al,dh |
| and edx,255 |
| mov ecx,DWORD PTR _CAST_S_table0[ecx*4] |
| mov ebx,DWORD PTR _CAST_S_table1[ebx*4] |
| xor ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table2[eax*4] |
| sub ecx,ebx |
| mov ebx,DWORD PTR _CAST_S_table3[edx*4] |
| add ecx,ebx |
| xor esi,ecx |
| nop |
| mov eax,DWORD PTR 20[esp] |
| mov DWORD PTR 4[eax],edi |
| mov DWORD PTR [eax],esi |
| pop edi |
| pop esi |
| pop ebx |
| pop ebp |
| ret |
| _CAST_decrypt ENDP |
| ALIGN 16 |
| _CAST_cbc_encrypt PROC PUBLIC |
| $L_CAST_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 $L002decrypt |
| and ebp,4294967288 |
| mov eax,DWORD PTR 8[esp] |
| mov ebx,DWORD PTR 12[esp] |
| jz $L003encrypt_finish |
| $L004encrypt_loop: |
| mov ecx,DWORD PTR [esi] |
| mov edx,DWORD PTR 4[esi] |
| xor eax,ecx |
| xor ebx,edx |
| bswap eax |
| bswap ebx |
| mov DWORD PTR 8[esp],eax |
| mov DWORD PTR 12[esp],ebx |
| call $L_CAST_encrypt_begin |
| mov eax,DWORD PTR 8[esp] |
| mov ebx,DWORD PTR 12[esp] |
| bswap eax |
| bswap ebx |
| mov DWORD PTR [edi],eax |
| mov DWORD PTR 4[edi],ebx |
| add esi,8 |
| add edi,8 |
| sub ebp,8 |
| jnz $L004encrypt_loop |
| $L003encrypt_finish: |
| mov ebp,DWORD PTR 52[esp] |
| and ebp,7 |
| jz $L005finish |
| call $L006PIC_point |
| $L006PIC_point: |
| pop edx |
| lea ecx,DWORD PTR ($L007cbc_enc_jmp_table-$L006PIC_point)[edx] |
| mov ebp,DWORD PTR [ebp*4+ecx] |
| add ebp,edx |
| xor ecx,ecx |
| xor edx,edx |
| jmp ebp |
| $L008ej7: |
| mov dh,BYTE PTR 6[esi] |
| shl edx,8 |
| $L009ej6: |
| mov dh,BYTE PTR 5[esi] |
| $L010ej5: |
| mov dl,BYTE PTR 4[esi] |
| $L011ej4: |
| mov ecx,DWORD PTR [esi] |
| jmp $L012ejend |
| $L013ej3: |
| mov ch,BYTE PTR 2[esi] |
| shl ecx,8 |
| $L014ej2: |
| mov ch,BYTE PTR 1[esi] |
| $L015ej1: |
| mov cl,BYTE PTR [esi] |
| $L012ejend: |
| xor eax,ecx |
| xor ebx,edx |
| bswap eax |
| bswap ebx |
| mov DWORD PTR 8[esp],eax |
| mov DWORD PTR 12[esp],ebx |
| call $L_CAST_encrypt_begin |
| mov eax,DWORD PTR 8[esp] |
| mov ebx,DWORD PTR 12[esp] |
| bswap eax |
| bswap ebx |
| mov DWORD PTR [edi],eax |
| mov DWORD PTR 4[edi],ebx |
| jmp $L005finish |
| $L002decrypt: |
| and ebp,4294967288 |
| mov eax,DWORD PTR 16[esp] |
| mov ebx,DWORD PTR 20[esp] |
| jz $L016decrypt_finish |
| $L017decrypt_loop: |
| mov eax,DWORD PTR [esi] |
| mov ebx,DWORD PTR 4[esi] |
| bswap eax |
| bswap ebx |
| mov DWORD PTR 8[esp],eax |
| mov DWORD PTR 12[esp],ebx |
| call $L_CAST_decrypt_begin |
| mov eax,DWORD PTR 8[esp] |
| mov ebx,DWORD PTR 12[esp] |
| bswap eax |
| bswap ebx |
| 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 $L017decrypt_loop |
| $L016decrypt_finish: |
| mov ebp,DWORD PTR 52[esp] |
| and ebp,7 |
| jz $L005finish |
| mov eax,DWORD PTR [esi] |
| mov ebx,DWORD PTR 4[esi] |
| bswap eax |
| bswap ebx |
| mov DWORD PTR 8[esp],eax |
| mov DWORD PTR 12[esp],ebx |
| call $L_CAST_decrypt_begin |
| mov eax,DWORD PTR 8[esp] |
| mov ebx,DWORD PTR 12[esp] |
| bswap eax |
| bswap ebx |
| 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] |
| $L018dj7: |
| ror edx,16 |
| mov BYTE PTR 6[edi],dl |
| shr edx,16 |
| $L019dj6: |
| mov BYTE PTR 5[edi],dh |
| $L020dj5: |
| mov BYTE PTR 4[edi],dl |
| $L021dj4: |
| mov DWORD PTR [edi],ecx |
| jmp $L022djend |
| $L023dj3: |
| ror ecx,16 |
| mov BYTE PTR 2[edi],cl |
| shl ecx,16 |
| $L024dj2: |
| mov BYTE PTR 1[esi],ch |
| $L025dj1: |
| mov BYTE PTR [esi],cl |
| $L022djend: |
| jmp $L005finish |
| $L005finish: |
| 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 |
| $L007cbc_enc_jmp_table: |
| DD 0 |
| DD $L015ej1-$L006PIC_point |
| DD $L014ej2-$L006PIC_point |
| DD $L013ej3-$L006PIC_point |
| DD $L011ej4-$L006PIC_point |
| DD $L010ej5-$L006PIC_point |
| DD $L009ej6-$L006PIC_point |
| DD $L008ej7-$L006PIC_point |
| ALIGN 64 |
| _CAST_cbc_encrypt ENDP |
| .text$ ENDS |
| END |
