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use error::{Result, Error};
use crypto;
use crypto::{PublicKey, SecretKey, Signature, DecoratedSignature, SignatureHint};
use crypto::{keypair_from_seed, random_bytes};
use strkey::{StrKey, Key};
use network::Network;
pub struct KeyPair {
pub seed: Option<Key>,
pub secret: Option<SecretKey>,
pub public: PublicKey,
}
impl KeyPair {
pub fn from_seed(seed: Key) -> Result<KeyPair> {
let (pk, sk) = keypair_from_seed(&seed)?;
Ok(KeyPair {
seed: Some(seed),
secret: Some(sk),
public: pk,
})
}
pub fn from_secret(secret: &str) -> Result<KeyPair> {
let strkey = StrKey::from_seed(&secret)?;
match strkey {
StrKey::Seed(seed) => Self::from_seed(seed),
_ => Err(Error::TBD),
}
}
pub fn random() -> Result<KeyPair> {
let seed = random_bytes(32);
Self::from_seed(seed)
}
pub fn from_public(account_id: &str) -> Result<KeyPair> {
let strkey = StrKey::from_account_id(&account_id)?;
match strkey {
StrKey::AccountId(key) => {
let pk = PublicKey::from_slice(&key)?;
if key.len() == 32 {
Ok(KeyPair {
seed: None,
secret: None,
public: pk,
})
} else {
Err(Error::TBD)
}
}
_ => Err(Error::TBD),
}
}
pub fn from_network(network: &Network) -> Result<KeyPair> {
let key = network.network_id();
Self::from_seed(key)
}
pub fn public_key(&self) -> StrKey {
let key = self.public.to_vec();
StrKey::AccountId(key)
}
pub fn secret_key(&self) -> Option<StrKey> {
match self.seed {
None => None,
Some(ref seed) => {
let key = seed.to_vec();
Some(StrKey::Seed(key))
}
}
}
pub fn can_sign(&self) -> bool {
self.secret.is_some()
}
pub fn sign(&self, m: &[u8]) -> Result<Signature> {
match self.secret {
Some(ref secret) => Ok(crypto::sign(m, &secret)),
_ => Err(Error::TBD),
}
}
pub fn sign_decorated(&self, m: &[u8]) -> Result<DecoratedSignature> {
let signature = self.sign(m)?;
let hint = self.signature_hint();
Ok(DecoratedSignature::new(hint, signature))
}
pub fn signature_hint(&self) -> SignatureHint {
self.public.signature_hint()
}
pub fn verify(&self, m: &[u8], sig: &Signature) -> bool {
crypto::verify(m, sig, &self.public)
}
}
#[cfg(test)]
mod tests {
use KeyPair;
use Network;
#[test]
fn test_from_secret() {
let the_secret = "SD7X7LEHBNMUIKQGKPARG5TDJNBHKC346OUARHGZL5ITC6IJPXHILY36";
let kp = KeyPair::from_secret(&the_secret).unwrap();
let public = kp.public_key().encode().unwrap();
assert_eq!(public,
"GDFQVQCYYB7GKCGSCUSIQYXTPLV5YJ3XWDMWGQMDNM4EAXAL7LITIBQ7");
let secret = kp.secret_key().unwrap().encode().unwrap();
assert_eq!(secret, the_secret);
assert!(kp.can_sign());
}
#[test]
fn test_from_public() {
let kp = KeyPair::from_public("GAAZI4TCR3TY5OJHCTJC2A4QSY6CJWJH5IAJTGKIN2ER7LBNVKOCCWN7")
.unwrap();
assert!(!kp.can_sign());
}
#[test]
fn test_from_network() {
let network = Network::public_network();
let kp = KeyPair::from_network(&network).unwrap();
let public = kp.public_key().encode().unwrap();
assert_eq!(public,
"GAAZI4TCR3TY5OJHCTJC2A4QSY6CJWJH5IAJTGKIN2ER7LBNVKOCCWN7");
assert!(kp.can_sign());
}
#[test]
fn test_sign_and_verify() {
let the_secret = "SD7X7LEHBNMUIKQGKPARG5TDJNBHKC346OUARHGZL5ITC6IJPXHILY36";
let kp = KeyPair::from_secret(&the_secret).unwrap();
let message = "test post please ignore".as_bytes();
let sign = kp.sign(&message).unwrap();
let expected_sign = vec![0x19, 0xDB, 0xFD, 0xAF, 0x0A, 0xA8, 0x4D, 0xF9, 0xA7, 0xFF, 0x6F,
0xE3, 0xC1, 0x0E, 0xBC, 0x1F, 0xE2, 0x14, 0xC5, 0x10, 0xB9, 0x5D,
0xB0, 0xD6, 0x33, 0xBE, 0xD9, 0x3D, 0xF9, 0x25, 0x6B, 0xA9, 0x92,
0xEF, 0x7D, 0x94, 0xB2, 0xA6, 0xE4, 0x54, 0xDE, 0x8F, 0x21, 0x9,
0x28, 0xCA, 0x96, 0x11, 0x39, 0x03, 0x29, 0xC8, 0x40, 0xC8, 0xE5,
0x64, 0xE7, 0xA0, 0x72, 0x16, 0x02, 0x7A, 0xB4, 0xA];
assert_eq!(sign.to_vec(), expected_sign);
assert!(kp.verify(&message, &sign));
}
#[test]
fn test_sign_decorated() {
let the_secret = "SD7X7LEHBNMUIKQGKPARG5TDJNBHKC346OUARHGZL5ITC6IJPXHILY36";
let kp = KeyPair::from_secret(&the_secret).unwrap();
let message = "test post please ignore".as_bytes();
let sign = kp.sign_decorated(&message).unwrap();
assert_eq!(sign.hint().to_vec(), vec![0x0B, 0xFA, 0xD1, 0x34]);
}
}