Function at 0x18001a670
Capabilities:
Encode data using xor
Hash data using fnv

Disassembly:
mov r11, rsp
push rbx
push r13
sub rsp, 0x58
movabs rax, 0xfffffffffffffff
mov qword [rsp + 0x20], rcx
mov r13, rcx
mov ebx, 1
bsr rcx, rax
mov eax, ebx
shl rax, cl
cmp rdx, rax
ja 0x18001a8df
mov qword [r11 + 0x18], rbp
lea rax, [rdx - 1]
mov rbp, qword [r13 + 8]
or rax, rbx
bsr rcx, rax
mov qword [r11 - 0x18], rsi
mov r8, rbp
inc ecx
mov qword [r11 - 0x20], rdi
shl rbx, cl
mov qword [r11 - 0x28], r12
lea r12, [r13 + 0x18]
mov rcx, r12
lea rdx, [rbx + rbx]
call fcn.18000e1e0
mov qword [r13 + 0x38], rbx
lea rax, [rbx - 1]
mov qword [r13 + 0x30], rax
mov rdi, qword [r13 + 8]
mov rdi, qword [rdi]
mov rsi, rdi
cmp rdi, rbp
je 0x18001a89a
mov qword [rsp + 0x38], r14
movabs rax, 0xcbf29ce484222325
mov qword [rsp + 0x30], r15
movabs r10, 0x100000001b3
nop word [rax + rax]
mov r9, qword [rdi + 0x28]
lea r8, [rdi + 0x10]
mov rsi, qword [rsi]
mov r15, qword [rdi + 0x20]
cmp r9, 0x10
jb 0x18001a739
mov r8, qword [rdi + 0x10]
xor ecx, ecx
mov rdx, rax
test r15, r15
je 0x18001a764
nop dword [rax]
nop word [rax + rax]
movzx eax, byte [rcx + r8]
inc rcx
xor rdx, rax
imul rdx, r10
cmp rcx, r15
jb 0x18001a750
mov r13, qword [r13 + 0x30]
and r13, rdx
shl r13, 4
add r13, qword [r12]
mov r12, qword [r13]
cmp r12, rbp
jne 0x18001a789
mov qword [r13], rdi
mov qword [r13 + 8], rdi
jmp 0x18001a871
mov rbx, qword [r13 + 8]
cmp qword [rbx + 0x28], 0x10
lea rdx, [rbx + 0x10]
mov rax, qword [rdx + 0x10]
jb 0x18001a79f
mov rdx, qword [rdx]
lea rcx, [rdi + 0x10]
cmp r9, 0x10
jb 0x18001a7ad
mov rcx, qword [rdi + 0x10]
cmp r15, rax
jne 0x18001a7f1
mov r8, r15
call sub.VCRUNTIME140.dll_memcmp
test eax, eax
jne 0x18001a7ed
mov r8, qword [rbx]
cmp r8, rdi
je 0x18001a7e7
mov rdx, qword [rdi + 8]
mov qword [rdx], rsi
mov rcx, qword [rsi + 8]
mov qword [rcx], r8
mov rax, qword [r8 + 8]
mov qword [rax], rdi
mov qword [r8 + 8], rcx
mov qword [rsi + 8], rdx
mov qword [rdi + 8], rax
mov qword [r13 + 8], rdi
jmp 0x18001a867
mov r9, qword [rdi + 0x28]
cmp r12, rbx
je 0x18001a842
nop word [rax + rax]
mov rbx, qword [rbx + 8]
cmp qword [rbx + 0x28], 0x10
lea rdx, [rbx + 0x10]
mov rax, qword [rdx + 0x10]
jb 0x18001a816
mov rdx, qword [rdx]
lea rcx, [rdi + 0x10]
cmp r9, 0x10
jb 0x18001a824
mov rcx, qword [rdi + 0x10]
cmp r15, rax
jne 0x18001a83d
mov r8, r15
call sub.VCRUNTIME140.dll_memcmp
test eax, eax
je 0x18001a8b9
mov r9, qword [rdi + 0x28]
cmp r12, rbx
jne 0x18001a800
mov rdx, qword [rdi + 8]
mov qword [rdx], rsi
mov rcx, qword [rsi + 8]
mov qword [rcx], rbx
mov rax, qword [rbx + 8]
mov qword [rax], rdi
mov qword [rbx + 8], rcx
mov qword [rsi + 8], rdx
mov qword [rdi + 8], rax
mov qword [r13], rdi
movabs r10, 0x100000001b3
mov r13, qword [rsp + 0x20]
mov rdi, rsi
movabs rax, 0xcbf29ce484222325
lea r12, [r13 + 0x18]
cmp rsi, rbp
jne 0x18001a720
mov r15, qword [rsp + 0x30]
mov r14, qword [rsp + 0x38]
mov rdi, qword [rsp + 0x48]
mov rsi, qword [rsp + 0x50]
mov rbp, qword [rsp + 0x80]
mov r12, qword [rsp + 0x40]
add rsp, 0x58
pop r13
pop rbx
ret
mov r8, qword [rbx]
mov rdx, qword [rdi + 8]
mov qword [rdx], rsi
mov rcx, qword [rsi + 8]
mov qword [rcx], r8
mov rax, qword [r8 + 8]
mov qword [rax], rdi
mov qword [r8 + 8], rcx
mov qword [rsi + 8], rdx
mov qword [rdi + 8], rax
jmp 0x18001a867
lea rcx, str.invalid_hash_bucket_count
call sub.MSVCP140.dll_void___cdecl_std::_Xlength_error_char_const____ptr64_
int3