Function at 0x140021270
Capabilities:
Encode data using xor
Hash data using fnv

Disassembly:
mov r11, rsp
push rbx
push r15
sub rsp, 0x58
movabs rax, 0xfffffffffffffff
mov qword [rsp + 0x20], rcx
mov r15, rcx
mov ebx, 1
bsr rcx, rax
mov eax, ebx
shl rax, cl
cmp rdx, rax
ja 0x1400214df
mov qword [r11 + 0x18], rbp
lea rax, [rdx - 1]
mov rbp, qword [r15 + 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 - 0x30], r13
lea r13, [r15 + 0x18]
mov rcx, r13
lea rdx, [rbx + rbx]
call fcn.140020f80
mov qword [r15 + 0x38], rbx
lea rax, [rbx - 1]
mov qword [r15 + 0x30], rax
mov rdi, qword [r15 + 8]
mov rdi, qword [rdi]
mov rsi, rdi
cmp rdi, rbp
je 0x14002149a
mov qword [rsp + 0x40], r12
movabs rax, 0xcbf29ce484222325
mov qword [rsp + 0x30], r14
movabs rbx, 0x100000001b3
nop word [rax + rax]
mov r12, qword [rdi + 0x28]
lea r9, [rdi + 0x10]
mov rsi, qword [rsi]
mov r8, qword [rdi + 0x20]
cmp r12, 0xf
jbe 0x140021339
mov r9, qword [rdi + 0x10]
xor edx, edx
mov rcx, rax
mov r10, r8
mov r11, r12
test r8, r8
je 0x140021364
nop dword [rax]
movzx eax, byte [r9 + rdx]
inc rdx
xor rcx, rax
imul rcx, rbx
cmp rdx, r8
jb 0x140021350
and rcx, qword [r15 + 0x30]
mov rax, qword [r13]
shl rcx, 4
add rax, rcx
mov qword [rsp + 0x28], rax
mov r13, qword [rax]
cmp r13, rbp
jne 0x14002138c
mov qword [rax], rdi
mov qword [rax + 8], rdi
jmp 0x140021476
mov rbx, qword [rax + 8]
cmp qword [rbx + 0x28], 0xf
lea rdx, [rbx + 0x10]
mov rax, qword [rdx + 0x10]
jbe 0x1400213a2
mov rdx, qword [rdx]
lea rcx, [rdi + 0x10]
mov r15, r8
cmp r12, 0xf
jbe 0x1400213b9
mov rcx, qword [rdi + 0x10]
mov r15, r10
mov r12, r11
cmp r8, rax
jne 0x1400213fb
call sub.VCRUNTIME140.dll_memcmp
test eax, eax
jne 0x1400213fb
mov r8, qword [rbx]
cmp r8, rdi
je 0x1400213f0
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 rax, qword [rsp + 0x28]
mov qword [rax + 8], rdi
jmp 0x140021467
cmp r13, rbx
je 0x14002143e
mov rbx, qword [rbx + 8]
cmp qword [rbx + 0x28], 0xf
lea rdx, [rbx + 0x10]
mov rax, qword [rdx + 0x10]
jbe 0x140021416
mov rdx, qword [rdx]
lea rcx, [rdi + 0x10]
cmp r12, 0xf
jbe 0x140021424
mov rcx, qword [rdi + 0x10]
cmp r15, rax
jne 0x140021439
mov r8, r15
call sub.VCRUNTIME140.dll_memcmp
test eax, eax
je 0x1400214b9
cmp r13, rbx
jne 0x140021400
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 rax, qword [rsp + 0x28]
mov qword [rax], rdi
mov r15, qword [rsp + 0x20]
movabs rbx, 0x100000001b3
lea r13, [r15 + 0x18]
mov rdi, rsi
movabs rax, 0xcbf29ce484222325
cmp rsi, rbp
jne 0x140021320
mov r14, qword [rsp + 0x30]
mov r12, qword [rsp + 0x40]
mov rdi, qword [rsp + 0x48]
mov rsi, qword [rsp + 0x50]
mov rbp, qword [rsp + 0x80]
mov r13, qword [rsp + 0x38]
add rsp, 0x58
pop r15
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 0x140021467
lea rcx, str.invalid_hash_bucket_count
call sub.MSVCP140.dll_void___cdecl_std::_Xlength_error_char_const____ptr64_
int3