Function at 0x6ca10
Capabilities:
Encode data using xor
Generate random numbers using the delphi lcg
Hash data with crc32

Disassembly:
push r12
push r14
push r15
sub rsp, 0x30
xor r12d, r12d
xor r15d, r15d
mov r14, r9
test r9, r9
je 0x6ca2b
mov byte [r9], r12b
test rcx, rcx
jne 0x6ca3e
lea eax, [rcx - 0x66]
add rsp, 0x30
pop r15
pop r14
pop r12
ret
mov qword [rsp + 0x50], rbx
mov rbx, qword [rcx + 0x80]
test rbx, rbx
jne 0x6ca62
lea eax, [rbx - 0x66]
mov rbx, qword [rsp + 0x50]
add rsp, 0x30
pop r15
pop r14
pop r12
ret
cmp qword [rbx], r12
jne 0x6ca7c
mov eax, 0xffffff9c
mov rbx, qword [rsp + 0x50]
add rsp, 0x30
pop r15
pop r14
pop r12
ret
test r8d, r8d
jne 0x6ca93
xor eax, eax
mov rbx, qword [rsp + 0x50]
add rsp, 0x30
pop r15
pop r14
pop r12
ret
mov eax, dword [rbx + 0x80]
cmp r8d, eax
mov qword [rsp + 0x58], rbp
cmova r8d, eax
mov qword [rsp + 0x60], rsi
mov qword [rsp + 0x28], rdi
mov qword [rsp + 0x20], r13
mov qword [rbx + 0x18], rdx
mov dword [rbx + 0x20], r8d
test r8d, r8d
je 0x6cd33
lea r13, [0x000894e0]
nop dword [rax]
cmp dword [rbx + 0x10], 0
jne 0x6cbed
mov eax, dword [rbx + 0x7c]
test eax, eax
je 0x6cbed
mov edx, dword [rbx + 0x94]
mov edi, 0x4000
mov rcx, qword [rbx + 0x88]
cmp eax, edi
cmovb edi, eax
add edx, dword [rbx + 0x60]
xor r8d, r8d
call fcn.0006bc20
test eax, eax
jne 0x6cd1e
mov r9, qword [rbx + 0x88]
lea r8d, [rax + 1]
mov rcx, qword [rbx]
mov edx, edi
mov esi, edi
call fcn.0006bce0
cmp rax, 1
jne 0x6cd1e
add dword [rbx + 0x60], edi
sub dword [rbx + 0x7c], edi
cmp byte [rbx + 0x98], 0
mov r10, qword [rbx]
mov qword [rbx + 8], r10
mov dword [rbx + 0x10], edi
je 0x6cbed
test edi, edi
je 0x6cbed
nop word [rax + rax]
mov r9d, dword [rbx + 0xa4]
mov edx, dword [rbx + 0x9c]
mov eax, r9d
and eax, 0xfffd
mov ecx, edx
or eax, 2
shr edx, 8
mov r8d, eax
xor r8d, 1
imul r8d, eax
shr r8d, 8
xor r8b, byte [r10]
movsx rax, r8b
xor rcx, rax
movzx eax, cl
mov ecx, dword [r13 + rax*4]
xor ecx, edx
movzx eax, cl
add eax, dword [rbx + 0xa0]
mov dword [rbx + 0x9c], ecx
imul ecx, eax, 0x8088405
inc ecx
mov dword [rbx + 0xa0], ecx
movzx eax, byte [rbx + 0xa3]
movzx ecx, r9b
xor rcx, rax
shr r9d, 8
mov eax, dword [r13 + rcx*4]
xor eax, r9d
mov dword [rbx + 0xa4], eax
mov byte [r10], r8b
inc r10
sub rsi, 1
jne 0x6cb60
mov r8d, dword [rbx + 0xa8]
mov r9d, dword [rbx + 0x10]
cmp r8d, r9d
cmova r8d, r9d
test r8d, r8d
je 0x6cc3f
mov rdx, qword [rbx + 8]
lea eax, [r8 - 1]
sub r9d, r8d
movzx r10d, byte [rax + rdx]
sub dword [rbx + 0x80], r8d
mov eax, r8d
add rax, rdx
mov dword [rbx + 0x10], r9d
sub dword [rbx + 0xa8], r8d
mov qword [rbx + 8], rax
jne 0x6cc3f
cmp r10b, byte [rbx + 0xac]
jne 0x6cd23
cmp dword [rbx + 0x90], 0
jne 0x6ccc4
mov esi, dword [rbx + 0x10]
cmp dword [rbx + 0x20], esi
cmovb esi, dword [rbx + 0x20]
test esi, esi
je 0x6cc7b
xor edx, edx
mov r8d, esi
nop dword [rax + rax]
mov rax, qword [rbx + 8]
lea rdx, [rdx + 1]
mov rcx, qword [rbx + 0x18]
movzx eax, byte [rdx + rax - 1]
mov byte [rdx + rcx - 1], al
sub r8, 1
jne 0x6cc60
mov rdi, qword [rbx + 0x18]
mov r8d, esi
mov ecx, dword [rbx + 0x74]
mov rdx, rdi
call fcn.0006b290
sub dword [rbx + 0x80], esi
add r15d, esi
sub dword [rbx + 0x10], esi
sub dword [rbx + 0x20], esi
add dword [rbx + 0x24], esi
mov ecx, esi
add qword [rbx + 8], rcx
cmp dword [rbx + 0x80], 0
mov dword [rbx + 0x74], eax
lea rax, [rsi + rdi]
mov qword [rbx + 0x18], rax
jne 0x6cd0a
test r14, r14
je 0x6cd0a
mov byte [r14], 1
jmp 0x6cd0a
mov edi, dword [rbx + 0x24]
lea rcx, [rbx + 8]
mov rsi, qword [rbx + 0x18]
call fcn.0006b6d0
mov ebp, dword [rbx + 0x24]
mov rdx, rsi
mov ecx, dword [rbx + 0x74]
sub ebp, edi
mov r8d, ebp
mov r12d, eax
call fcn.0006b290
sub dword [rbx + 0x80], ebp
add r15d, ebp
mov dword [rbx + 0x74], eax
cmp r12d, 1
je 0x6cd2a
cmp dword [rbx + 0x80], 0
je 0x6cd2a
test r12d, r12d
jne 0x6cd19
cmp dword [rbx + 0x20], 0
ja 0x6cad0
test r12d, r12d
je 0x6cd33
mov eax, r12d
jmp 0x6cd36
or eax, 0xffffffff
jmp 0x6cd36
mov eax, 0xffffff96
jmp 0x6cd36
test r14, r14
je 0x6cd33
mov byte [r14], 1
mov eax, r15d
mov rdi, qword [rsp + 0x28]
mov rsi, qword [rsp + 0x60]
mov rbp, qword [rsp + 0x58]
mov r13, qword [rsp + 0x20]
mov rbx, qword [rsp + 0x50]
add rsp, 0x30
pop r15
pop r14
pop r12
ret