Function at 0x51bd20
Capabilities:
Encode data using base64

Disassembly:
cmp rsp, qword [r14 + 0x10]
jbe 0x51bfeb
push rbp
mov rbp, rsp
sub rsp, 0x68
mov qword [rsp + 0x78], rax
mov qword [rsp + 0x80], rbx
cmp qword [rcx + 0x10], 0
jne 0x51bd4a
xor edx, edx
jmp 0x51bd60
cmp byte [rcx], 0
je 0x51bd58
mov rdx, 0xffffffffffffffff
jmp 0x51bd60
mov edx, 1
nop dword [rax]
test rdx, rdx
jle 0x51bfd7
mov qword [rsp + 0x88], rcx
mov qword [rsp + 0x80], rbx
mov qword [rsp + 0x78], rax
lea rax, [0x005bbc40]
call sym.runtime.newobject
mov qword [rsp + 0x50], rax
mov rbx, qword [rax + 0x10]
mov rcx, qword [rax + 0x18]
mov rdx, qword [rax + 8]
mov edi, 1
mov rax, rdx
call sym.math_big.nat.setUint64
mov rdx, qword [rsp + 0x50]
mov qword [rdx + 0x10], rbx
mov qword [rdx + 0x18], rcx
cmp dword [0x007e00d0], 0
je 0x51bdd0
nop
call sym.runtime.gcWriteBarrier2
mov qword [r11], rax
mov rsi, qword [rdx + 8]
mov qword [r11 + 8], rsi
mov qword [rdx + 8], rax
mov byte [rdx], 0
mov rax, rdx
mov rbx, qword [rsp + 0x88]
mov rcx, rax
call sym.math_big._Int_.Sub
mov rax, qword [rsp + 0x50]
mov rdx, qword [rax + 0x10]
lea rsi, [rdx - 1]
test rsi, rsi
jl 0x51be5d
mov rdi, qword [rax + 8]
mov rdx, qword [rdi + rdx*8 - 8]
mov rdi, rdx
shr rdx, 1
or rdx, rdi
mov rdi, rdx
shr rdx, 2
or rdx, rdi
mov rdi, rdx
shr rdx, 4
or rdx, rdi
mov rdi, rdx
shr rdx, 8
or rdx, rdi
mov rdi, rdx
shr rdx, 0x10
or rdx, rdi
mov rdi, rdx
shr rdx, 0x20
or rdx, rdi
shl rsi, 6
bsr rdx, rdx
mov rdi, 0xffffffffffffffff
cmove rdx, rdi
lea rdx, [rdx + rsi]
lea rdx, [rdx + 1]
jmp 0x51be60
xor edx, edx
nop
test rdx, rdx
je 0x51bec8
mov qword [rsp + 0x30], rdx
lea rsi, [rdx + 7]
sar rsi, 0x3f
shr rsi, 0x3d
lea rcx, [rsi + rdx]
lea rcx, [rcx + 7]
sar rcx, 3
mov qword [rsp + 0x38], rcx
lea rax, [0x005a49a0]
mov rbx, rcx
call sym.runtime.makeslice
mov qword [rsp + 0x60], rax
mov rdx, qword [rsp + 0x30]
mov rsi, rdx
sar rdx, 0x3f
shr rdx, 0x3d
add rdx, rsi
and rdx, 0xfffffffffffffff8
sub rsi, rdx
test rsi, rsi
mov edx, 8
cmove rsi, rdx
mov qword [rsp + 0x48], rsi
jmp 0x51bed7
xor ebx, ebx
xor ecx, ecx
add rsp, 0x68
pop rbp
ret
mov rax, qword [rsp + 0x60]
nop
mov rbx, qword [rsp + 0x80]
mov rcx, rax
mov rdi, qword [rsp + 0x38]
mov rsi, rdi
mov r8, rsi
mov rax, qword [rsp + 0x78]
call sym.io.ReadAtLeast
nop dword [rax + rax]
test rbx, rbx
jne 0x51bfc5
mov r8, qword [rsp + 0x38]
test r8, r8
jbe 0x51bfcd
mov qword [rsp + 0x40], rbx
mov qword [rsp + 0x58], rcx
mov rdi, qword [rsp + 0x60]
movzx edx, byte [rdi]
mov rcx, qword [rsp + 0x48]
mov r9d, 1
shl r9, cl
cmp rcx, 0x40
sbb r10, r10
and r9, r10
dec r9
and edx, r9d
mov byte [rdi], dl
mov rdx, qword [rsp + 0x50]
mov rax, qword [rdx + 8]
mov rbx, qword [rdx + 0x10]
mov r9, qword [rdx + 0x18]
nop
mov rsi, r8
mov rcx, r9
call sym.math_big.nat.setBytes
mov rdx, qword [rsp + 0x50]
mov qword [rdx + 0x10], rbx
mov qword [rdx + 0x18], rcx
cmp dword [0x007e00d0], 0
je 0x51bf90
nop dword [rax]
call sym.runtime.gcWriteBarrier2
mov qword [r11], rax
mov rcx, qword [rdx + 8]
mov qword [r11 + 8], rcx
mov qword [rdx + 8], rax
mov byte [rdx], 0
mov rax, rdx
mov rbx, qword [rsp + 0x88]
call sym.math_big._Int_.Cmp
test rax, rax
jge 0x51bed2
mov rax, qword [rsp + 0x50]
mov rbx, qword [rsp + 0x40]
mov rcx, qword [rsp + 0x58]
add rsp, 0x68
pop rbp
ret
xor eax, eax
add rsp, 0x68
pop rbp
ret
xor eax, eax
mov rcx, rax
call sym.runtime.panicIndex
lea rax, [0x005a4920]
lea rbx, [0x0063ebc0]
call sym.runtime.gopanic
nop
mov qword [rsp + 8], rax
mov qword [rsp + 0x10], rbx
mov qword [rsp + 0x18], rcx
call sym.runtime.morestack_noctxt.abi0
mov rax, qword [rsp + 8]
mov rbx, qword [rsp + 0x10]
mov rcx, qword [rsp + 0x18]
jmp sym.crypto_rand.Int