use std::{
collections::{HashMap, HashSet},
fs::{self, File},
io::Write,
path::PathBuf,
sync::Arc,
};
use async_trait::async_trait;
use parking_lot::RwLock;
use sp_core::{
crypto::{CryptoTypePublicPair, KeyTypeId, Pair as PairT, ExposeSecret, SecretString, Public},
sr25519::{Public as Sr25519Public, Pair as Sr25519Pair},
Encode,
};
use sp_keystore::{
CryptoStore,
SyncCryptoStorePtr,
Error as TraitError,
SyncCryptoStore,
vrf::{VRFTranscriptData, VRFSignature, make_transcript},
};
use sp_application_crypto::{ed25519, sr25519, ecdsa, AppPair, AppKey, IsWrappedBy};
use crate::{Result, Error};
pub struct LocalKeystore(RwLock<KeystoreInner>);
impl LocalKeystore {
pub fn open<T: Into<PathBuf>>(path: T, password: Option<SecretString>) -> Result<Self> {
let inner = KeystoreInner::open(path, password)?;
Ok(Self(RwLock::new(inner)))
}
pub fn in_memory() -> Self {
let inner = KeystoreInner::new_in_memory();
Self(RwLock::new(inner))
}
pub fn key_pair<Pair: AppPair>(&self, public: &<Pair as AppKey>::Public) -> Result<Pair> {
self.0.read().key_pair::<Pair>(public)
}
}
#[async_trait]
impl CryptoStore for LocalKeystore {
async fn keys(&self, id: KeyTypeId) -> std::result::Result<Vec<CryptoTypePublicPair>, TraitError> {
SyncCryptoStore::keys(self, id)
}
async fn sr25519_public_keys(&self, id: KeyTypeId) -> Vec<sr25519::Public> {
SyncCryptoStore::sr25519_public_keys(self, id)
}
async fn sr25519_generate_new(
&self,
id: KeyTypeId,
seed: Option<&str>,
) -> std::result::Result<sr25519::Public, TraitError> {
SyncCryptoStore::sr25519_generate_new(self, id, seed)
}
async fn ed25519_public_keys(&self, id: KeyTypeId) -> Vec<ed25519::Public> {
SyncCryptoStore::ed25519_public_keys(self, id)
}
async fn ed25519_generate_new(
&self,
id: KeyTypeId,
seed: Option<&str>,
) -> std::result::Result<ed25519::Public, TraitError> {
SyncCryptoStore::ed25519_generate_new(self, id, seed)
}
async fn ecdsa_public_keys(&self, id: KeyTypeId) -> Vec<ecdsa::Public> {
SyncCryptoStore::ecdsa_public_keys(self, id)
}
async fn ecdsa_generate_new(
&self,
id: KeyTypeId,
seed: Option<&str>,
) -> std::result::Result<ecdsa::Public, TraitError> {
SyncCryptoStore::ecdsa_generate_new(self, id, seed)
}
async fn insert_unknown(&self, id: KeyTypeId, suri: &str, public: &[u8]) -> std::result::Result<(), ()> {
SyncCryptoStore::insert_unknown(self, id, suri, public)
}
async fn has_keys(&self, public_keys: &[(Vec<u8>, KeyTypeId)]) -> bool {
SyncCryptoStore::has_keys(self, public_keys)
}
async fn supported_keys(
&self,
id: KeyTypeId,
keys: Vec<CryptoTypePublicPair>,
) -> std::result::Result<Vec<CryptoTypePublicPair>, TraitError> {
SyncCryptoStore::supported_keys(self, id, keys)
}
async fn sign_with(
&self,
id: KeyTypeId,
key: &CryptoTypePublicPair,
msg: &[u8],
) -> std::result::Result<Vec<u8>, TraitError> {
SyncCryptoStore::sign_with(self, id, key, msg)
}
async fn sr25519_vrf_sign(
&self,
key_type: KeyTypeId,
public: &sr25519::Public,
transcript_data: VRFTranscriptData,
) -> std::result::Result<VRFSignature, TraitError> {
SyncCryptoStore::sr25519_vrf_sign(self, key_type, public, transcript_data)
}
}
impl SyncCryptoStore for LocalKeystore {
fn keys(
&self,
id: KeyTypeId
) -> std::result::Result<Vec<CryptoTypePublicPair>, TraitError> {
let raw_keys = self.0.read().raw_public_keys(id)?;
Ok(raw_keys.into_iter()
.fold(Vec::new(), |mut v, k| {
v.push(CryptoTypePublicPair(sr25519::CRYPTO_ID, k.clone()));
v.push(CryptoTypePublicPair(ed25519::CRYPTO_ID, k.clone()));
v.push(CryptoTypePublicPair(ecdsa::CRYPTO_ID, k));
v
}))
}
fn supported_keys(
&self,
id: KeyTypeId,
keys: Vec<CryptoTypePublicPair>
) -> std::result::Result<Vec<CryptoTypePublicPair>, TraitError> {
let all_keys = SyncCryptoStore::keys(self, id)?
.into_iter()
.collect::<HashSet<_>>();
Ok(keys.into_iter().filter(|key| all_keys.contains(key)).collect::<Vec<_>>())
}
fn sign_with(
&self,
id: KeyTypeId,
key: &CryptoTypePublicPair,
msg: &[u8],
) -> std::result::Result<Vec<u8>, TraitError> {
match key.0 {
ed25519::CRYPTO_ID => {
let pub_key = ed25519::Public::from_slice(key.1.as_slice());
let key_pair: ed25519::Pair = self.0.read()
.key_pair_by_type::<ed25519::Pair>(&pub_key, id)
.map_err(|e| TraitError::from(e))?;
Ok(key_pair.sign(msg).encode())
}
sr25519::CRYPTO_ID => {
let pub_key = sr25519::Public::from_slice(key.1.as_slice());
let key_pair: sr25519::Pair = self.0.read()
.key_pair_by_type::<sr25519::Pair>(&pub_key, id)
.map_err(|e| TraitError::from(e))?;
Ok(key_pair.sign(msg).encode())
},
ecdsa::CRYPTO_ID => {
let pub_key = ecdsa::Public::from_slice(key.1.as_slice());
let key_pair: ecdsa::Pair = self.0.read()
.key_pair_by_type::<ecdsa::Pair>(&pub_key, id)
.map_err(|e| TraitError::from(e))?;
Ok(key_pair.sign(msg).encode())
}
_ => Err(TraitError::KeyNotSupported(id))
}
}
fn sr25519_public_keys(&self, key_type: KeyTypeId) -> Vec<sr25519::Public> {
self.0.read().raw_public_keys(key_type)
.map(|v| {
v.into_iter()
.map(|k| sr25519::Public::from_slice(k.as_slice()))
.collect()
})
.unwrap_or_default()
}
fn sr25519_generate_new(
&self,
id: KeyTypeId,
seed: Option<&str>,
) -> std::result::Result<sr25519::Public, TraitError> {
let pair = match seed {
Some(seed) => self.0.write().insert_ephemeral_from_seed_by_type::<sr25519::Pair>(seed, id),
None => self.0.write().generate_by_type::<sr25519::Pair>(id),
}.map_err(|e| -> TraitError { e.into() })?;
Ok(pair.public())
}
fn ed25519_public_keys(&self, key_type: KeyTypeId) -> Vec<ed25519::Public> {
self.0.read().raw_public_keys(key_type)
.map(|v| {
v.into_iter()
.map(|k| ed25519::Public::from_slice(k.as_slice()))
.collect()
})
.unwrap_or_default()
}
fn ed25519_generate_new(
&self,
id: KeyTypeId,
seed: Option<&str>,
) -> std::result::Result<ed25519::Public, TraitError> {
let pair = match seed {
Some(seed) => self.0.write().insert_ephemeral_from_seed_by_type::<ed25519::Pair>(seed, id),
None => self.0.write().generate_by_type::<ed25519::Pair>(id),
}.map_err(|e| -> TraitError { e.into() })?;
Ok(pair.public())
}
fn ecdsa_public_keys(&self, key_type: KeyTypeId) -> Vec<ecdsa::Public> {
self.0.read().raw_public_keys(key_type)
.map(|v| {
v.into_iter()
.map(|k| ecdsa::Public::from_slice(k.as_slice()))
.collect()
})
.unwrap_or_default()
}
fn ecdsa_generate_new(
&self,
id: KeyTypeId,
seed: Option<&str>,
) -> std::result::Result<ecdsa::Public, TraitError> {
let pair = match seed {
Some(seed) => self.0.write().insert_ephemeral_from_seed_by_type::<ecdsa::Pair>(seed, id),
None => self.0.write().generate_by_type::<ecdsa::Pair>(id),
}.map_err(|e| -> TraitError { e.into() })?;
Ok(pair.public())
}
fn insert_unknown(&self, key_type: KeyTypeId, suri: &str, public: &[u8])
-> std::result::Result<(), ()>
{
self.0.write().insert_unknown(key_type, suri, public).map_err(|_| ())
}
fn has_keys(&self, public_keys: &[(Vec<u8>, KeyTypeId)]) -> bool {
public_keys.iter().all(|(p, t)| self.0.read().key_phrase_by_type(&p, *t).is_ok())
}
fn sr25519_vrf_sign(
&self,
key_type: KeyTypeId,
public: &Sr25519Public,
transcript_data: VRFTranscriptData,
) -> std::result::Result<VRFSignature, TraitError> {
let transcript = make_transcript(transcript_data);
let pair = self.0.read().key_pair_by_type::<Sr25519Pair>(public, key_type)
.map_err(|e| TraitError::PairNotFound(e.to_string()))?;
let (inout, proof, _) = pair.as_ref().vrf_sign(transcript);
Ok(VRFSignature {
output: inout.to_output(),
proof,
})
}
}
impl Into<SyncCryptoStorePtr> for LocalKeystore {
fn into(self) -> SyncCryptoStorePtr {
Arc::new(self)
}
}
impl Into<Arc<dyn CryptoStore>> for LocalKeystore {
fn into(self) -> Arc<dyn CryptoStore> {
Arc::new(self)
}
}
struct KeystoreInner {
path: Option<PathBuf>,
additional: HashMap<(KeyTypeId, Vec<u8>), String>,
password: Option<SecretString>,
}
impl KeystoreInner {
fn open<T: Into<PathBuf>>(path: T, password: Option<SecretString>) -> Result<Self> {
let path = path.into();
fs::create_dir_all(&path)?;
let instance = Self { path: Some(path), additional: HashMap::new(), password };
Ok(instance)
}
fn password(&self) -> Option<&str> {
self.password.as_ref()
.map(|p| p.expose_secret())
.map(|p| p.as_str())
}
fn new_in_memory() -> Self {
Self {
path: None,
additional: HashMap::new(),
password: None
}
}
fn get_additional_pair(
&self,
public: &[u8],
key_type: KeyTypeId,
) -> Option<&String> {
let key = (key_type, public.to_vec());
self.additional.get(&key)
}
fn insert_ephemeral_pair<Pair: PairT>(&mut self, pair: &Pair, seed: &str, key_type: KeyTypeId) {
let key = (key_type, pair.public().to_raw_vec());
self.additional.insert(key, seed.into());
}
fn insert_unknown(&self, key_type: KeyTypeId, suri: &str, public: &[u8]) -> Result<()> {
if let Some(path) = self.key_file_path(public, key_type) {
let mut file = File::create(path).map_err(Error::Io)?;
serde_json::to_writer(&file, &suri).map_err(Error::Json)?;
file.flush().map_err(Error::Io)?;
}
Ok(())
}
fn generate_by_type<Pair: PairT>(&mut self, key_type: KeyTypeId) -> Result<Pair> {
let (pair, phrase, _) = Pair::generate_with_phrase(self.password());
if let Some(path) = self.key_file_path(pair.public().as_slice(), key_type) {
let mut file = File::create(path)?;
serde_json::to_writer(&file, &phrase)?;
file.flush()?;
} else {
self.insert_ephemeral_pair(&pair, &phrase, key_type);
}
Ok(pair)
}
fn insert_ephemeral_from_seed_by_type<Pair: PairT>(
&mut self,
seed: &str,
key_type: KeyTypeId,
) -> Result<Pair> {
let pair = Pair::from_string(seed, None).map_err(|_| Error::InvalidSeed)?;
self.insert_ephemeral_pair(&pair, seed, key_type);
Ok(pair)
}
fn key_phrase_by_type(&self, public: &[u8], key_type: KeyTypeId) -> Result<String> {
if let Some(phrase) = self.get_additional_pair(public, key_type) {
return Ok(phrase.clone())
}
let path = self.key_file_path(public, key_type).ok_or_else(|| Error::Unavailable)?;
let file = File::open(path)?;
serde_json::from_reader(&file).map_err(Into::into)
}
fn key_pair_by_type<Pair: PairT>(&self,
public: &Pair::Public,
key_type: KeyTypeId,
) -> Result<Pair> {
let phrase = self.key_phrase_by_type(public.as_slice(), key_type)?;
let pair = Pair::from_string(
&phrase,
self.password(),
).map_err(|_| Error::InvalidPhrase)?;
if &pair.public() == public {
Ok(pair)
} else {
Err(Error::InvalidPassword)
}
}
fn key_file_path(&self, public: &[u8], key_type: KeyTypeId) -> Option<PathBuf> {
let mut buf = self.path.as_ref()?.clone();
let key_type = hex::encode(key_type.0);
let key = hex::encode(public);
buf.push(key_type + key.as_str());
Some(buf)
}
fn raw_public_keys(&self, id: KeyTypeId) -> Result<Vec<Vec<u8>>> {
let mut public_keys: Vec<Vec<u8>> = self.additional.keys()
.into_iter()
.filter_map(|k| if k.0 == id { Some(k.1.clone()) } else { None })
.collect();
if let Some(path) = &self.path {
for entry in fs::read_dir(&path)? {
let entry = entry?;
let path = entry.path();
if let Some(name) = path.file_name().and_then(|n| n.to_str()) {
match hex::decode(name) {
Ok(ref hex) if hex.len() > 4 => {
if &hex[0..4] != &id.0 {
continue;
}
let public = hex[4..].to_vec();
public_keys.push(public);
}
_ => continue,
}
}
}
}
Ok(public_keys)
}
pub fn key_pair<Pair: AppPair>(&self, public: &<Pair as AppKey>::Public) -> Result<Pair> {
self.key_pair_by_type::<Pair::Generic>(IsWrappedBy::from_ref(public), Pair::ID).map(Into::into)
}
}
#[cfg(test)]
mod tests {
use super::*;
use tempfile::TempDir;
use sp_core::{
Pair,
crypto::Ss58Codec,
testing::SR25519,
};
use sp_application_crypto::{ed25519, sr25519, AppPublic};
use std::{
fs,
str::FromStr,
};
const TEST_KEY_TYPE: KeyTypeId = KeyTypeId(*b"test");
impl KeystoreInner {
fn insert_ephemeral_from_seed<Pair: AppPair>(&mut self, seed: &str) -> Result<Pair> {
self.insert_ephemeral_from_seed_by_type::<Pair::Generic>(seed, Pair::ID).map(Into::into)
}
fn public_keys<Public: AppPublic>(&self) -> Result<Vec<Public>> {
self.raw_public_keys(Public::ID)
.map(|v| {
v.into_iter()
.map(|k| Public::from_slice(k.as_slice()))
.collect()
})
}
fn generate<Pair: AppPair>(&mut self) -> Result<Pair> {
self.generate_by_type::<Pair::Generic>(Pair::ID).map(Into::into)
}
}
#[test]
fn basic_store() {
let temp_dir = TempDir::new().unwrap();
let mut store = KeystoreInner::open(temp_dir.path(), None).unwrap();
assert!(store.public_keys::<ed25519::AppPublic>().unwrap().is_empty());
let key: ed25519::AppPair = store.generate().unwrap();
let key2: ed25519::AppPair = store.key_pair(&key.public()).unwrap();
assert_eq!(key.public(), key2.public());
assert_eq!(store.public_keys::<ed25519::AppPublic>().unwrap()[0], key.public());
}
#[test]
fn test_insert_ephemeral_from_seed() {
let temp_dir = TempDir::new().unwrap();
let mut store = KeystoreInner::open(temp_dir.path(), None).unwrap();
let pair: ed25519::AppPair = store.insert_ephemeral_from_seed(
"0x3d97c819d68f9bafa7d6e79cb991eebcd77d966c5334c0b94d9e1fa7ad0869dc"
).unwrap();
assert_eq!(
"5DKUrgFqCPV8iAXx9sjy1nyBygQCeiUYRFWurZGhnrn3HJCA",
pair.public().to_ss58check()
);
drop(store);
let store = KeystoreInner::open(temp_dir.path(), None).unwrap();
assert!(store.key_pair::<ed25519::AppPair>(&pair.public()).is_err());
}
#[test]
fn password_being_used() {
let password = String::from("password");
let temp_dir = TempDir::new().unwrap();
let mut store = KeystoreInner::open(
temp_dir.path(),
Some(FromStr::from_str(password.as_str()).unwrap()),
).unwrap();
let pair: ed25519::AppPair = store.generate().unwrap();
assert_eq!(
pair.public(),
store.key_pair::<ed25519::AppPair>(&pair.public()).unwrap().public(),
);
let store = KeystoreInner::open(temp_dir.path(), None).unwrap();
assert!(store.key_pair::<ed25519::AppPair>(&pair.public()).is_err());
let store = KeystoreInner::open(
temp_dir.path(),
Some(FromStr::from_str(password.as_str()).unwrap()),
).unwrap();
assert_eq!(
pair.public(),
store.key_pair::<ed25519::AppPair>(&pair.public()).unwrap().public(),
);
}
#[test]
fn public_keys_are_returned() {
let temp_dir = TempDir::new().unwrap();
let mut store = KeystoreInner::open(temp_dir.path(), None).unwrap();
let mut keys = Vec::new();
for i in 0..10 {
keys.push(store.generate::<ed25519::AppPair>().unwrap().public());
keys.push(store.insert_ephemeral_from_seed::<ed25519::AppPair>(
&format!("0x3d97c819d68f9bafa7d6e79cb991eebcd7{}d966c5334c0b94d9e1fa7ad0869dc", i),
).unwrap().public());
}
store.generate::<sr25519::AppPair>().unwrap();
keys.sort();
let mut store_pubs = store.public_keys::<ed25519::AppPublic>().unwrap();
store_pubs.sort();
assert_eq!(keys, store_pubs);
}
#[test]
fn store_unknown_and_extract_it() {
let temp_dir = TempDir::new().unwrap();
let store = KeystoreInner::open(temp_dir.path(), None).unwrap();
let secret_uri = "//Alice";
let key_pair = sr25519::AppPair::from_string(secret_uri, None).expect("Generates key pair");
store.insert_unknown(
SR25519,
secret_uri,
key_pair.public().as_ref(),
).expect("Inserts unknown key");
let store_key_pair = store.key_pair_by_type::<sr25519::AppPair>(
&key_pair.public(),
SR25519,
).expect("Gets key pair from keystore");
assert_eq!(key_pair.public(), store_key_pair.public());
}
#[test]
fn store_ignores_files_with_invalid_name() {
let temp_dir = TempDir::new().unwrap();
let store = LocalKeystore::open(temp_dir.path(), None).unwrap();
let file_name = temp_dir.path().join(hex::encode(&SR25519.0[..2]));
fs::write(file_name, "test").expect("Invalid file is written");
assert!(
SyncCryptoStore::sr25519_public_keys(&store, SR25519).is_empty(),
);
}
#[test]
fn generate_with_seed_is_not_stored() {
let temp_dir = TempDir::new().unwrap();
let store = LocalKeystore::open(temp_dir.path(), None).unwrap();
let _alice_tmp_key = SyncCryptoStore::sr25519_generate_new(&store, TEST_KEY_TYPE, Some("//Alice")).unwrap();
assert_eq!(SyncCryptoStore::sr25519_public_keys(&store, TEST_KEY_TYPE).len(), 1);
drop(store);
let store = LocalKeystore::open(temp_dir.path(), None).unwrap();
assert_eq!(SyncCryptoStore::sr25519_public_keys(&store, TEST_KEY_TYPE).len(), 0);
}
#[test]
fn generate_can_be_fetched_in_memory() {
let store = LocalKeystore::in_memory();
SyncCryptoStore::sr25519_generate_new(&store, TEST_KEY_TYPE, Some("//Alice")).unwrap();
assert_eq!(SyncCryptoStore::sr25519_public_keys(&store, TEST_KEY_TYPE).len(), 1);
SyncCryptoStore::sr25519_generate_new(&store, TEST_KEY_TYPE, None).unwrap();
assert_eq!(SyncCryptoStore::sr25519_public_keys(&store, TEST_KEY_TYPE).len(), 2);
}
}