Function at 0x1400a3b00
Capabilities:
Encode data using xor
Generate random numbers using a mersenne twister

Disassembly:
cmp rcx, rdx
je 0x1400a3dc0
push r14
sub rsp, 0x20
lea rax, [rcx + 1]
mov r14, r8
mov qword [rsp + 0x30], rax
mov r9, rdx
mov r10, rcx
cmp rax, rdx
je 0x1400a3dba
mov qword [rsp + 0x38], rbx
mov qword [rsp + 0x40], rbp
mov qword [rsp + 0x48], rsi
mov qword [rsp + 0x18], rdi
mov qword [rsp + 0x10], r12
mov qword [rsp + 8], r13
mov r13d, 2
mov qword [rsp], r15
lea r12, [r13 - 1]
nop word [rax + rax]
xor ebp, ebp
xor r15d, r15d
test r12, r12
je 0x1400a3d3e
mov rdx, qword [r14 + 8]
nop dword [rax]
nop word [rax + rax]
lea ecx, [rdx + 0xff]
shl rbp, cl
add rbp, rbp
nop dword [rax]
mov rdi, qword [r14]
mov ecx, dword [rdi]
cmp ecx, 0x270
jne 0x1400a3bf3
lea rax, [rdi + 8]
mov r11d, ecx
nop dword [rax]
nop dword [rax + rax]
mov r8d, dword [rax - 4]
xor r8d, dword [rax]
lea rax, [rax + 4]
btr r8d, 0x1f
xor r8d, dword [rax - 8]
mov ecx, r8d
and cl, 1
neg cl
sbb edx, edx
shr r8d, 1
and edx, 0x9908b0df
xor edx, dword [rax + 0x62c]
xor edx, r8d
mov dword [rax + 0x9b8], edx
sub r11, 1
jne 0x1400a3bb0
mov ecx, dword [rdi]
jmp 0x1400a3cd2
cmp ecx, 0x4e0
jb 0x1400a3cd2
lea rbx, [rdi + 0x9c4]
mov esi, 0xe3
mov eax, dword [rbx]
nop dword [rax]
mov edx, eax
lea r8, [rbx + 4]
xor edx, dword [r8]
btr edx, 0x1f
xor edx, eax
mov eax, edx
and al, 1
neg al
mov eax, dword [r8]
sbb ecx, ecx
shr edx, 1
and ecx, 0x9908b0df
xor ecx, dword [rbx + 0x634]
xor ecx, edx
mov dword [rbx - 0x9c0], ecx
lea rbx, [r8]
sub rsi, 1
jne 0x1400a3c10
lea rbx, [rdi + 0xd50]
mov esi, 0x18c
mov eax, dword [rbx]
nop word [rax + rax]
mov edx, eax
lea r8, [rbx + 4]
xor edx, dword [r8]
btr edx, 0x1f
xor edx, eax
mov eax, edx
and al, 1
neg al
mov eax, dword [r8]
sbb ecx, ecx
shr edx, 1
and ecx, 0x9908b0df
xor ecx, dword [rbx - 0xd4c]
xor ecx, edx
mov dword [rbx - 0x9c0], ecx
lea rbx, [r8]
sub rsi, 1
jne 0x1400a3c60
mov edx, dword [rdi + 0x1380]
xor edx, dword [rdi + 4]
btr edx, 0x1f
xor edx, dword [rdi + 0x1380]
mov eax, edx
and al, 1
neg al
sbb ecx, ecx
shr edx, 1
and ecx, 0x9908b0df
xor ecx, dword [rdi + 0x634]
xor ecx, edx
mov dword [rdi + 0x9c0], ecx
xor ecx, ecx
mov dword [rdi], 0
mov eax, ecx
mov edx, dword [rdi + rax*4 + 4]
lea eax, [rcx + 1]
mov dword [rdi], eax
mov ecx, edx
mov eax, dword [rdi + 0x1384]
mov r8, qword [r14 + 0x10]
shr ecx, 0xb
and eax, ecx
xor edx, eax
mov eax, edx
and eax, 0xff3a58ad
shl eax, 7
xor edx, eax
mov eax, edx
and edx, 0xffffdf8c
shl edx, 0xf
mov ecx, edx
xor rcx, rax
mov rax, rcx
shr rax, 0x12
xor rax, rcx
cmp rax, r8
ja 0x1400a3b90
mov rdx, qword [r14 + 8]
or rbp, rax
lea ecx, [rdx + 0xff]
shl r15, cl
add r15, r15
or r15, r8
cmp r15, r12
jb 0x1400a3b80
xor edx, edx
mov rax, r15
div r13
mov rcx, rax
mov r8, rdx
xor edx, edx
mov rax, rbp
div r13
cmp rax, rcx
jb 0x1400a3d62
cmp r8, r12
jne 0x1400a3b60
mov r8, qword [rsp + 0x30]
xor edx, edx
mov rax, rbp
div r13
cmp rdx, r12
je 0x1400a3d84
movzx eax, byte [rdx + r10]
movzx ecx, byte [r8]
mov byte [r8], al
mov byte [rdx + r10], cl
inc r8
inc r13
mov qword [rsp + 0x30], r8
cmp r8, r9
jne 0x1400a3b52
mov r15, qword [rsp]
mov r13, qword [rsp + 8]
mov r12, qword [rsp + 0x10]
mov rdi, qword [rsp + 0x18]
mov rsi, qword [rsp + 0x48]
mov rbp, qword [rsp + 0x40]
mov rbx, qword [rsp + 0x38]
add rsp, 0x20
pop r14
ret