Function at 0x10031300
Capabilities:
Encode data using base64

Disassembly:
push ebp
mov ebp, esp
sub esp, 0xc
push ebx
push esi
mov esi, dword [ebp + 8]
mov ebx, edx
mov dword [ebp - 0xc], ebx
mov dword [ebp - 4], ecx
push edi
mov edi, ecx
cmp ebx, 0x10
jb 0x100314b3
mov eax, 0xaaaaaaab
mul ebx
shr edx, 3
lea eax, [edx + edx*2]
mov edx, ecx
lea eax, [edx + eax*4]
mov dword [ebp - 8], eax
lea ebx, [edx + 5]
lea eax, [esi + 6]
mov edx, eax
nop dword [eax]
movzx ecx, byte [edi]
movzx eax, byte [ebx - 4]
shl ecx, 8
add ecx, eax
movzx eax, byte [ebx - 3]
shl ecx, 8
add ecx, eax
mov eax, ecx
shr eax, 0x12
movzx eax, byte [eax + str.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_]
mov byte [esi], al
mov eax, ecx
shr eax, 0xc
and eax, 0x3f
movzx eax, byte [eax + str.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_]
mov byte [edx - 5], al
mov eax, ecx
shr eax, 6
and ecx, 0x3f
and eax, 0x3f
movzx eax, byte [eax + str.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_]
mov byte [edx - 4], al
movzx eax, byte [ecx + str.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_]
mov byte [edx - 3], al
movzx ecx, byte [ebx - 2]
movzx eax, byte [ebx - 1]
shl ecx, 8
add ecx, eax
movzx eax, byte [ebx]
shl ecx, 8
add ecx, eax
mov eax, ecx
shr eax, 0x12
movzx eax, byte [eax + str.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_]
mov byte [edx - 2], al
mov eax, ecx
shr eax, 0xc
and eax, 0x3f
movzx eax, byte [eax + str.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_]
mov byte [edx - 1], al
mov eax, ecx
shr eax, 6
and ecx, 0x3f
and eax, 0x3f
movzx eax, byte [eax + str.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_]
mov byte [edx], al
movzx eax, byte [ecx + str.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_]
mov byte [edx + 1], al
movzx ecx, byte [ebx + 1]
movzx eax, byte [ebx + 2]
shl ecx, 8
add ecx, eax
movzx eax, byte [ebx + 3]
shl ecx, 8
add ecx, eax
mov eax, ecx
shr eax, 0x12
movzx eax, byte [eax + str.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_]
mov byte [edx + 2], al
mov eax, ecx
shr eax, 0xc
and eax, 0x3f
movzx eax, byte [eax + str.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_]
mov byte [edx + 3], al
mov eax, ecx
shr eax, 6
and ecx, 0x3f
and eax, 0x3f
movzx eax, byte [eax + str.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_]
mov byte [edx + 4], al
movzx eax, byte [ecx + str.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_]
mov byte [edx + 5], al
movzx ecx, byte [ebx + 4]
movzx eax, byte [ebx + 5]
shl ecx, 8
add ecx, eax
movzx eax, byte [ebx + 6]
shl ecx, 8
add ecx, eax
mov eax, ecx
shr eax, 0x12
movzx eax, byte [eax + str.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_]
lea ebx, [ebx + 0xc]
mov byte [edx + 6], al
lea edx, [edx + 0x10]
mov eax, ecx
add edi, 0xc
shr eax, 0xc
add esi, 0x10
and eax, 0x3f
movzx eax, byte [eax + str.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_]
mov byte [edx - 9], al
mov eax, ecx
shr eax, 6
and ecx, 0x3f
and eax, 0x3f
movzx eax, byte [eax + str.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_]
mov byte [edx - 8], al
movzx eax, byte [ecx + str.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_]
mov byte [edx - 7], al
cmp edi, dword [ebp - 8]
jne 0x10031340
mov edx, dword [ebp - 4]
mov ebx, dword [ebp - 0xc]
sub edx, edi
add ebx, edx
cmp ebx, 3
jb 0x10031523
mov eax, 0xaaaaaaab
mul ebx
shr edx, 1
movzx ecx, byte [edi]
sub ebx, 3
movzx eax, byte [edi + 1]
shl ecx, 8
add ecx, eax
movzx eax, byte [edi + 2]
shl ecx, 8
add edi, 3
add ecx, eax
mov eax, ecx
shr eax, 0x12
movzx eax, byte [eax + str.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_]
mov byte [esi], al
mov eax, ecx
shr eax, 0xc
and eax, 0x3f
movzx eax, byte [eax + str.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_]
mov byte [esi + 1], al
mov eax, ecx
shr eax, 6
and ecx, 0x3f
and eax, 0x3f
movzx eax, byte [eax + str.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_]
mov byte [esi + 2], al
movzx eax, byte [ecx + str.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_]
mov byte [esi + 3], al
add esi, 4
sub edx, 1
jne 0x100314c1
cmp ebx, 1
jne 0x10031556
movzx ecx, byte [edi]
mov eax, ecx
mov word [esi + 2], 0x3d3d
shr eax, 2
and ecx, 3
shl ecx, 4
pop edi
movzx eax, byte [eax + str.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_]
mov byte [esi], al
movzx eax, byte [ecx + str.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_]
mov byte [esi + 1], al
pop esi
pop ebx
mov esp, ebp
pop ebp
ret
cmp ebx, 2
jne 0x10031599
movzx ecx, byte [edi]
movzx eax, byte [edi + 1]
shl ecx, 8
add ecx, eax
mov byte [esi + 3], 0x3d
mov eax, ecx
shr eax, 0xa
movzx eax, byte [eax + str.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_]
mov byte [esi], al
mov eax, ecx
shr eax, 4
and eax, 0x3f
and ecx, 0xf
movzx eax, byte [eax + str.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_]
mov byte [esi + 1], al
movzx eax, byte [ecx*4 + str.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_]
mov byte [esi + 2], al
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret