IronForce is a decentralized network, Degeon is a messenger built on it
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/// This module has wrappers for cryptography with RSA algorithms.
/// Its main structs - `PublicKey` and `Keys` implement all functions for key generation, signatures and asymmetric encryption
use alloc::vec::Vec;
use serde::{Deserialize, Serialize};
use rsa::{RsaPublicKey, RsaPrivateKey, PaddingScheme, PublicKey as RPK};
use rsa::errors::Result as RsaRes;
use rand::rngs::OsRng;
static KEY_LENGTH: usize = 2048;
/// Public key of a node
#[derive(Debug, PartialEq, Serialize, Deserialize, Clone)]
pub struct PublicKey {
pub key: RsaPublicKey,
}
impl PublicKey {
/// Check if the sign is valid for given data and key
pub fn verify_sign(&self, data: &[u8], sign: &[u8]) -> bool {
self.key.verify(PaddingScheme::PKCS1v15Sign { hash: None }, data, sign).is_ok()
}
/// Encrypt some data for a user with this public key
pub fn encrypt_data(&self, data: &[u8]) -> RsaRes<Vec<u8>> {
self.key.encrypt(&mut OsRng {}, PaddingScheme::PKCS1v15Encrypt, data)
}
}
/// Key pair (public and secret) for a node, should be stored locally
#[derive(Debug, Serialize, Deserialize, Clone)]
pub struct Keys {
public_key: RsaPublicKey,
private_key: RsaPrivateKey,
}
impl Keys {
/// Generate new random key
pub fn generate() -> Self {
let mut rng = OsRng;
let private_key = RsaPrivateKey::new(&mut rng, KEY_LENGTH).expect("failed to generate a key");
let public_key = RsaPublicKey::from(&private_key);
Self {
private_key,
public_key,
}
}
}
impl Keys {
/// Sign content using these keys
pub fn sign(&self, content: &[u8]) -> RsaRes<Vec<u8>> {
self.private_key.sign(PaddingScheme::PKCS1v15Sign { hash: None }, content)
}
/// Decrypt data
pub fn decrypt_data(&self, data_encrypted: &[u8]) -> RsaRes<Vec<u8>> {
self.private_key.decrypt(PaddingScheme::PKCS1v15Encrypt, data_encrypted)
}
/// Get public key
pub fn get_public(&self) -> PublicKey {
PublicKey { key: self.public_key.clone() }
}
}
#[test]
fn test_encrypt() {
let data = vec![0, 5, 8, 135, 67];
let keys = Keys::generate();
assert_eq!(
keys.decrypt_data(&keys.get_public().encrypt_data(&data).unwrap()).unwrap(),
data
);
}
#[test]
fn test_invalid_encrypt() {
let data = vec![0, 5, 8, 135, 67];
let keys_1 = Keys::generate();
let keys_2 = Keys::generate();
assert!(keys_2.decrypt_data(&keys_1.get_public().encrypt_data(&data).unwrap()).is_err());
}
#[test]
fn test_signing() {
let data = vec![0, 5, 8, 135, 67];
let keys = Keys::generate();
assert!(keys.get_public().verify_sign(&data, &keys.sign(&data).unwrap()));
}
#[test]
fn test_invalid_signing() {
let data = vec![0, 5, 8, 135, 67];
let keys_1 = Keys::generate();
let keys_2 = Keys::generate();
assert!(!keys_2.get_public().verify_sign(&data, &keys_1.sign(&data).unwrap()));
}