mirror of
https://github.com/librespot-org/librespot.git
synced 2024-12-28 17:21:52 +00:00
53 lines
1.7 KiB
Rust
53 lines
1.7 KiB
Rust
use num_bigint::BigUint;
|
|
use num_traits::FromPrimitive;
|
|
use rand::Rng;
|
|
|
|
use util;
|
|
|
|
lazy_static! {
|
|
pub static ref DH_GENERATOR: BigUint = BigUint::from_u64(0x2).unwrap();
|
|
pub static ref DH_PRIME: BigUint = BigUint::from_bytes_be(&[
|
|
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc9,
|
|
0x0f, 0xda, 0xa2, 0x21, 0x68, 0xc2, 0x34, 0xc4, 0xc6,
|
|
0x62, 0x8b, 0x80, 0xdc, 0x1c, 0xd1, 0x29, 0x02, 0x4e,
|
|
0x08, 0x8a, 0x67, 0xcc, 0x74, 0x02, 0x0b, 0xbe, 0xa6,
|
|
0x3b, 0x13, 0x9b, 0x22, 0x51, 0x4a, 0x08, 0x79, 0x8e,
|
|
0x34, 0x04, 0xdd, 0xef, 0x95, 0x19, 0xb3, 0xcd, 0x3a,
|
|
0x43, 0x1b, 0x30, 0x2b, 0x0a, 0x6d, 0xf2, 0x5f, 0x14,
|
|
0x37, 0x4f, 0xe1, 0x35, 0x6d, 0x6d, 0x51, 0xc2, 0x45,
|
|
0xe4, 0x85, 0xb5, 0x76, 0x62, 0x5e, 0x7e, 0xc6, 0xf4,
|
|
0x4c, 0x42, 0xe9, 0xa6, 0x3a, 0x36, 0x20, 0xff, 0xff,
|
|
0xff, 0xff, 0xff, 0xff, 0xff, 0xff ]);
|
|
}
|
|
|
|
pub struct DHLocalKeys {
|
|
private_key: BigUint,
|
|
public_key: BigUint,
|
|
}
|
|
|
|
impl DHLocalKeys {
|
|
pub fn random<R: Rng>(rng: &mut R) -> DHLocalKeys {
|
|
let key_data = util::rand_vec(rng, 95);
|
|
|
|
let private_key = BigUint::from_bytes_be(&key_data);
|
|
let public_key = util::powm(&DH_GENERATOR, &private_key, &DH_PRIME);
|
|
|
|
DHLocalKeys {
|
|
private_key: private_key,
|
|
public_key: public_key,
|
|
}
|
|
}
|
|
|
|
pub fn public_key(&self) -> Vec<u8> {
|
|
self.public_key.to_bytes_be()
|
|
}
|
|
|
|
pub fn shared_secret(&self, remote_key: &[u8]) -> Vec<u8> {
|
|
let shared_key = util::powm(
|
|
&BigUint::from_bytes_be(remote_key),
|
|
&self.private_key,
|
|
&DH_PRIME,
|
|
);
|
|
shared_key.to_bytes_be()
|
|
}
|
|
}
|