能帮我看看这段代码的加密原理吗？谢谢！！
64002BC5 8B4D F8 mov ecx,dword ptr ss:[ebp-8]
64002BC8 83C1 03 add ecx,3
64002BCB 894D F8 mov dword ptr ss:[ebp-8],ecx
64002BCE 8B55 10 mov edx,dword ptr ss:[ebp+10]
64002BD1 83EA 02 sub edx,2
64002BD4 3955 F8 cmp dword ptr ss:[ebp-8],edx
64002BD7 0F8D BA000000 jge STAR400.64002C97
64002BDD 8B45 0C mov eax,dword ptr ss:[ebp+C]
64002BE0 0345 F8 add eax,dword ptr ss:[ebp-8]
64002BE3 0FBE08 movsx ecx,byte ptr ds:[eax]
64002BE6 C1F9 02 sar ecx,2
64002BE9 83E1 3F and ecx,3F
64002BEC 8B55 FC mov edx,dword ptr ss:[ebp-4]
64002BEF 8A81 18031564 mov al,byte ptr ds:[ecx+64150318]
64002BF5 8802 mov byte ptr ds:[edx],al
64002BF7 8B4D FC mov ecx,dword ptr ss:[ebp-4]
64002BFA 83C1 01 add ecx,1
64002BFD 894D FC mov dword ptr ss:[ebp-4],ecx
64002C00 8B55 0C mov edx,dword ptr ss:[ebp+C]
64002C03 0355 F8 add edx,dword ptr ss:[ebp-8]
64002C06 0FBE02 movsx eax,byte ptr ds:[edx]
64002C09 83E0 03 and eax,3
64002C0C C1E0 04 shl eax,4
64002C0F 8B4D 0C mov ecx,dword ptr ss:[ebp+C]
64002C12 034D F8 add ecx,dword ptr ss:[ebp-8]
64002C15 0FBE51 01 movsx edx,byte ptr ds:[ecx+1]
64002C19 81E2 F0000000 and edx,0F0
64002C1F C1FA 04 sar edx,4
64002C22 0BC2 or eax,edx
64002C24 8B4D FC mov ecx,dword ptr ss:[ebp-4]
64002C27 8A90 18031564 mov dl,byte ptr ds:[eax+64150318]
64002C2D 8811 mov byte ptr ds:[ecx],dl
64002C2F 8B45 FC mov eax,dword ptr ss:[ebp-4]
64002C32 83C0 01 add eax,1
64002C35 8945 FC mov dword ptr ss:[ebp-4],eax
64002C38 8B4D 0C mov ecx,dword ptr ss:[ebp+C]
64002C3B 034D F8 add ecx,dword ptr ss:[ebp-8]
64002C3E 0FBE51 01 movsx edx,byte ptr ds:[ecx+1]
64002C42 83E2 0F and edx,0F
64002C45 C1E2 02 shl edx,2
64002C48 8B45 0C mov eax,dword ptr ss:[ebp+C]
64002C4B 0345 F8 add eax,dword ptr ss:[ebp-8]
64002C4E 0FBE48 02 movsx ecx,byte ptr ds:[eax+2]
64002C52 81E1 C0000000 and ecx,0C0
64002C58 C1F9 06 sar ecx,6
64002C5B 0BD1 or edx,ecx
64002C5D 8B45 FC mov eax,dword ptr ss:[ebp-4]
64002C60 8A8A 18031564 mov cl,byte ptr ds:[edx+64150318]
64002C66 8808 mov byte ptr ds:[eax],cl
64002C68 8B55 FC mov edx,dword ptr ss:[ebp-4]
64002C6B 83C2 01 add edx,1
64002C6E 8955 FC mov dword ptr ss:[ebp-4],edx
64002C71 8B45 0C mov eax,dword ptr ss:[ebp+C]
64002C74 0345 F8 add eax,dword ptr ss:[ebp-8]
64002C77 0FBE48 02 movsx ecx,byte ptr ds:[eax+2]
64002C7B 83E1 3F and ecx,3F
64002C7E 8B55 FC mov edx,dword ptr ss:[ebp-4]
64002C81 8A81 18031564 mov al,byte ptr ds:[ecx+64150318]
64002C87 8802 mov byte ptr ds:[edx],al
64002C89 8B4D FC mov ecx,dword ptr ss:[ebp-4]
64002C8C 83C1 01 add ecx,1
64002C8F 894D FC mov dword ptr ss:[ebp-4],ecx
64002C92 ^ E9 2EFFFFFF jmp STAR400.64002BC5
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