Function at 0x634940
Capabilities:
Encrypt data using curve25519

Disassembly:
push ebp
mov ebp, esp
mov eax, 0x20
call fcn.004d28e0
mov dword [ebp - 8], 0
cmp dword [ebp + 0x18], 2
je 0x634a82
cmp dword [ebp + 8], 0
je 0x634a10
mov eax, dword [ebp + 8]
push eax
push 0
lea ecx, [ebp - 0x10]
push ecx
push 0
call fcn.00583150
add esp, 0x10
cmp dword [ebp - 0x10], 0xffffffff
je 0x6349b3
call fcn.0052db80
push str.ossl_ecx_key_op
push 0x9f
push str.cryptoececx_backend.c
call fcn.0052ddd0
add esp, 0xc
push 0
push 0x66
push 0x10
call fcn.0052df00
add esp, 0xc
xor eax, eax
jmp 0x634cdb
cmp dword [ebp + 0x14], 0
jne 0x6349cc
mov edx, dword [ebp + 8]
mov eax, dword [edx]
push eax
call fcn.00537cb0
add esp, 4
mov dword [ebp + 0x14], eax
jmp 0x634a10
mov ecx, dword [ebp + 8]
mov edx, dword [ecx]
push edx
call fcn.00537cb0
add esp, 4
cmp dword [ebp + 0x14], eax
je 0x634a10
call fcn.0052db80
push str.ossl_ecx_key_op
push 0xa5
push str.cryptoececx_backend.c
call fcn.0052ddd0
add esp, 0xc
push 0
push 0x66
push 0x10
call fcn.0052df00
add esp, 0xc
xor eax, eax
jmp 0x634cdb
cmp dword [ebp + 0xc], 0
je 0x634a51
cmp dword [ebp + 0x14], 0
je 0x634a51
cmp dword [ebp + 0x14], 0x40a
je 0x634a42
cmp dword [ebp + 0x14], 0x43f
je 0x634a42
xor eax, eax
cmp dword [ebp + 0x14], 0x40b
setne al
add eax, 0x38
mov dword [ebp - 0x14], eax
jmp 0x634a49
mov dword [ebp - 0x14], 0x20
mov ecx, dword [ebp + 0x10]
cmp ecx, dword [ebp - 0x14]
je 0x634a82
call fcn.0052db80
push str.ossl_ecx_key_op
push 0xab
push str.cryptoececx_backend.c
call fcn.0052ddd0
add esp, 0xc
push 0
push 0x66
push 0x10
call fcn.0052df00
add esp, 0xc
xor eax, eax
jmp 0x634cdb
cmp dword [ebp + 0x14], 0x40a
je 0x634aa9
cmp dword [ebp + 0x14], 0x43f
je 0x634aa9
xor edx, edx
cmp dword [ebp + 0x14], 0x40b
setne dl
lea edx, [edx + edx + 1]
mov dword [ebp - 0x18], edx
jmp 0x634abb
mov eax, dword [ebp + 0x14]
sub eax, 0x40a
neg eax
sbb eax, eax
and eax, 2
mov dword [ebp - 0x18], eax
mov ecx, dword [ebp + 0x20]
push ecx
push 1
mov edx, dword [ebp - 0x18]
push edx
mov eax, dword [ebp + 0x1c]
push eax
call fcn.0059d500
add esp, 0x10
mov dword [ebp - 8], eax
cmp dword [ebp - 8], 0
jne 0x634b0e
call fcn.0052db80
push str.ossl_ecx_key_op
push 0xb2
push str.cryptoececx_backend.c
call fcn.0052ddd0
add esp, 0xc
push 0
push 0xc0100
push 0x10
call fcn.0052df00
add esp, 0xc
xor eax, eax
jmp 0x634cdb
mov ecx, dword [ebp - 8]
add ecx, 0xc
mov dword [ebp - 0xc], ecx
cmp dword [ebp + 0x18], 0
jne 0x634b36
mov edx, dword [ebp + 0x10]
push edx
mov eax, dword [ebp + 0xc]
push eax
mov ecx, dword [ebp - 0xc]
push ecx
call fcn.004cfb70
add esp, 0xc
jmp 0x634cc8
mov edx, dword [ebp - 8]
push edx
call fcn.0059d760
add esp, 4
mov dword [ebp - 4], eax
cmp dword [ebp - 4], 0
jne 0x634b7d
call fcn.0052db80
push str.ossl_ecx_key_op
push 0xbc
push str.cryptoececx_backend.c
call fcn.0052ddd0
add esp, 0xc
push 0
push 0xc0100
push 0x10
call fcn.0052df00
add esp, 0xc
jmp 0x634ccd
cmp dword [ebp + 0x18], 2
jne 0x634c48
cmp dword [ebp + 0x14], 0
je 0x634c46
cmp dword [ebp + 0x14], 0x40a
je 0x634bb7
cmp dword [ebp + 0x14], 0x43f
je 0x634bb7
xor eax, eax
cmp dword [ebp + 0x14], 0x40b
setne al
add eax, 0x38
mov dword [ebp - 0x1c], eax
jmp 0x634bbe
mov dword [ebp - 0x1c], 0x20
push 0
mov ecx, dword [ebp - 0x1c]
push ecx
mov edx, dword [ebp - 4]
push edx
mov eax, dword [ebp + 0x1c]
push eax
call fcn.004fe260
add esp, 0x10
test eax, eax
jg 0x634bdd
jmp 0x634ccd
cmp dword [ebp + 0x14], 0x40a
jne 0x634c19
mov ecx, dword [ebp - 4]
movzx edx, byte [ecx]
and edx, 0xf8
mov eax, dword [ebp - 4]
mov byte [eax], dl
mov ecx, dword [ebp - 4]
movzx edx, byte [ecx + 0x1f]
and edx, 0x7f
mov eax, dword [ebp - 4]
mov byte [eax + 0x1f], dl
mov ecx, dword [ebp - 4]
movzx edx, byte [ecx + 0x1f]
or edx, 0x40
mov eax, dword [ebp - 4]
mov byte [eax + 0x1f], dl
jmp 0x634c46
cmp dword [ebp + 0x14], 0x40b
jne 0x634c46
mov ecx, dword [ebp - 4]
movzx edx, byte [ecx]
and edx, 0xfc
mov eax, dword [ebp - 4]
mov byte [eax], dl
mov ecx, dword [ebp - 4]
movzx edx, byte [ecx + 0x37]
or edx, 0x80
mov eax, dword [ebp - 4]
mov byte [eax + 0x37], dl
jmp 0x634c89
cmp dword [ebp + 0x14], 0x40a
je 0x634c6e
cmp dword [ebp + 0x14], 0x43f
je 0x634c6e
xor ecx, ecx
cmp dword [ebp + 0x14], 0x40b
setne cl
add ecx, 0x38
mov dword [ebp - 0x20], ecx
jmp 0x634c75
mov dword [ebp - 0x20], 0x20
mov edx, dword [ebp - 0x20]
push edx
mov eax, dword [ebp + 0xc]
push eax
mov ecx, dword [ebp - 4]
push ecx
call fcn.004cfb70
add esp, 0xc
mov edx, dword [ebp - 8]
push edx
call fcn.00634530
add esp, 4
test eax, eax
jne 0x634cc8
call fcn.0052db80
push str.ossl_ecx_key_op
push 0xd0
push str.cryptoececx_backend.c
call fcn.0052ddd0
add esp, 0xc
push 0
push 0xa6
push 0x10
call fcn.0052df00
add esp, 0xc
jmp 0x634ccd
mov eax, dword [ebp - 8]
jmp 0x634cdb
mov eax, dword [ebp - 8]
push eax
call fcn.0059d640
add esp, 4
xor eax, eax
mov esp, ebp
pop ebp
ret