#[cfg(feature = "full_crypto")]
use sp_std::vec::Vec;
use crate::{hash::H256, hash::H512};
use codec::{Encode, Decode};
#[cfg(feature = "full_crypto")]
use blake2_rfc;
#[cfg(feature = "full_crypto")]
use core::convert::TryFrom;
#[cfg(feature = "full_crypto")]
use ed25519_dalek::{Signer as _, Verifier as _};
#[cfg(feature = "std")]
use substrate_bip39::seed_from_entropy;
#[cfg(feature = "std")]
use bip39::{Mnemonic, Language, MnemonicType};
#[cfg(feature = "full_crypto")]
use crate::crypto::{Pair as TraitPair, DeriveJunction, SecretStringError};
#[cfg(feature = "std")]
use crate::crypto::Ss58Codec;
#[cfg(feature = "std")]
use serde::{de, Serializer, Serialize, Deserializer, Deserialize};
use crate::crypto::{Public as TraitPublic, CryptoTypePublicPair, UncheckedFrom, CryptoType, Derive, CryptoTypeId};
use sp_runtime_interface::pass_by::PassByInner;
use sp_std::ops::Deref;
pub const CRYPTO_ID: CryptoTypeId = CryptoTypeId(*b"ed25");
#[cfg(feature = "full_crypto")]
type Seed = [u8; 32];
#[cfg_attr(feature = "full_crypto", derive(Hash))]
#[derive(PartialEq, Eq, PartialOrd, Ord, Clone, Copy, Encode, Decode, Default, PassByInner)]
pub struct Public(pub [u8; 32]);
#[cfg(feature = "full_crypto")]
pub struct Pair(ed25519_dalek::Keypair);
#[cfg(feature = "full_crypto")]
impl Clone for Pair {
fn clone(&self) -> Self {
Pair(ed25519_dalek::Keypair {
public: self.0.public.clone(),
secret: ed25519_dalek::SecretKey::from_bytes(self.0.secret.as_bytes())
.expect("key is always the correct size; qed")
})
}
}
impl AsRef<[u8; 32]> for Public {
fn as_ref(&self) -> &[u8; 32] {
&self.0
}
}
impl AsRef<[u8]> for Public {
fn as_ref(&self) -> &[u8] {
&self.0[..]
}
}
impl AsMut<[u8]> for Public {
fn as_mut(&mut self) -> &mut [u8] {
&mut self.0[..]
}
}
impl Deref for Public {
type Target = [u8];
fn deref(&self) -> &Self::Target {
&self.0
}
}
impl sp_std::convert::TryFrom<&[u8]> for Public {
type Error = ();
fn try_from(data: &[u8]) -> Result<Self, Self::Error> {
if data.len() == 32 {
let mut inner = [0u8; 32];
inner.copy_from_slice(data);
Ok(Public(inner))
} else {
Err(())
}
}
}
impl From<Public> for [u8; 32] {
fn from(x: Public) -> Self {
x.0
}
}
#[cfg(feature = "full_crypto")]
impl From<Pair> for Public {
fn from(x: Pair) -> Self {
x.public()
}
}
impl From<Public> for H256 {
fn from(x: Public) -> Self {
x.0.into()
}
}
#[cfg(feature = "std")]
impl std::str::FromStr for Public {
type Err = crate::crypto::PublicError;
fn from_str(s: &str) -> Result<Self, Self::Err> {
Self::from_ss58check(s)
}
}
impl UncheckedFrom<[u8; 32]> for Public {
fn unchecked_from(x: [u8; 32]) -> Self {
Public::from_raw(x)
}
}
impl UncheckedFrom<H256> for Public {
fn unchecked_from(x: H256) -> Self {
Public::from_h256(x)
}
}
#[cfg(feature = "std")]
impl std::fmt::Display for Public {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
write!(f, "{}", self.to_ss58check())
}
}
impl sp_std::fmt::Debug for Public {
#[cfg(feature = "std")]
fn fmt(&self, f: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {
let s = self.to_ss58check();
write!(f, "{} ({}...)", crate::hexdisplay::HexDisplay::from(&self.0), &s[0..8])
}
#[cfg(not(feature = "std"))]
fn fmt(&self, _: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {
Ok(())
}
}
#[cfg(feature = "std")]
impl Serialize for Public {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where S: Serializer {
serializer.serialize_str(&self.to_ss58check())
}
}
#[cfg(feature = "std")]
impl<'de> Deserialize<'de> for Public {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> where D: Deserializer<'de> {
Public::from_ss58check(&String::deserialize(deserializer)?)
.map_err(|e| de::Error::custom(format!("{:?}", e)))
}
}
#[derive(Encode, Decode, PassByInner)]
pub struct Signature(pub [u8; 64]);
impl sp_std::convert::TryFrom<&[u8]> for Signature {
type Error = ();
fn try_from(data: &[u8]) -> Result<Self, Self::Error> {
if data.len() == 64 {
let mut inner = [0u8; 64];
inner.copy_from_slice(data);
Ok(Signature(inner))
} else {
Err(())
}
}
}
#[cfg(feature = "std")]
impl Serialize for Signature {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where S: Serializer {
serializer.serialize_str(&hex::encode(self))
}
}
#[cfg(feature = "std")]
impl<'de> Deserialize<'de> for Signature {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> where D: Deserializer<'de> {
let signature_hex = hex::decode(&String::deserialize(deserializer)?)
.map_err(|e| de::Error::custom(format!("{:?}", e)))?;
Ok(Signature::try_from(signature_hex.as_ref())
.map_err(|e| de::Error::custom(format!("{:?}", e)))?)
}
}
impl Clone for Signature {
fn clone(&self) -> Self {
let mut r = [0u8; 64];
r.copy_from_slice(&self.0[..]);
Signature(r)
}
}
impl Default for Signature {
fn default() -> Self {
Signature([0u8; 64])
}
}
impl PartialEq for Signature {
fn eq(&self, b: &Self) -> bool {
self.0[..] == b.0[..]
}
}
impl Eq for Signature {}
impl From<Signature> for H512 {
fn from(v: Signature) -> H512 {
H512::from(v.0)
}
}
impl From<Signature> for [u8; 64] {
fn from(v: Signature) -> [u8; 64] {
v.0
}
}
impl AsRef<[u8; 64]> for Signature {
fn as_ref(&self) -> &[u8; 64] {
&self.0
}
}
impl AsRef<[u8]> for Signature {
fn as_ref(&self) -> &[u8] {
&self.0[..]
}
}
impl AsMut<[u8]> for Signature {
fn as_mut(&mut self) -> &mut [u8] {
&mut self.0[..]
}
}
impl sp_std::fmt::Debug for Signature {
#[cfg(feature = "std")]
fn fmt(&self, f: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {
write!(f, "{}", crate::hexdisplay::HexDisplay::from(&self.0))
}
#[cfg(not(feature = "std"))]
fn fmt(&self, _: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {
Ok(())
}
}
#[cfg(feature = "full_crypto")]
impl sp_std::hash::Hash for Signature {
fn hash<H: sp_std::hash::Hasher>(&self, state: &mut H) {
sp_std::hash::Hash::hash(&self.0[..], state);
}
}
impl Signature {
pub fn from_raw(data: [u8; 64]) -> Signature {
Signature(data)
}
pub fn from_slice(data: &[u8]) -> Self {
let mut r = [0u8; 64];
r.copy_from_slice(data);
Signature(r)
}
pub fn from_h512(v: H512) -> Signature {
Signature(v.into())
}
}
#[cfg(feature = "std")]
#[derive(PartialEq, Eq, Clone, Debug, Encode, Decode)]
pub struct LocalizedSignature {
pub signer: Public,
pub signature: Signature,
}
#[cfg(feature = "std")]
#[derive(Clone, Copy, Eq, PartialEq, Debug)]
pub enum PublicError {
BadBase58,
BadLength,
UnknownVersion,
InvalidChecksum,
}
impl Public {
pub fn from_raw(data: [u8; 32]) -> Self {
Public(data)
}
pub fn from_h256(x: H256) -> Self {
Public(x.into())
}
pub fn as_array_ref(&self) -> &[u8; 32] {
self.as_ref()
}
}
impl TraitPublic for Public {
fn from_slice(data: &[u8]) -> Self {
let mut r = [0u8; 32];
r.copy_from_slice(data);
Public(r)
}
fn to_public_crypto_pair(&self) -> CryptoTypePublicPair {
CryptoTypePublicPair(CRYPTO_ID, self.to_raw_vec())
}
}
impl Derive for Public {}
impl From<Public> for CryptoTypePublicPair {
fn from(key: Public) -> Self {
(&key).into()
}
}
impl From<&Public> for CryptoTypePublicPair {
fn from(key: &Public) -> Self {
CryptoTypePublicPair(CRYPTO_ID, key.to_raw_vec())
}
}
#[cfg(feature = "full_crypto")]
fn derive_hard_junction(secret_seed: &Seed, cc: &[u8; 32]) -> Seed {
("Ed25519HDKD", secret_seed, cc).using_encoded(|data| {
let mut res = [0u8; 32];
res.copy_from_slice(blake2_rfc::blake2b::blake2b(32, &[], data).as_bytes());
res
})
}
#[cfg(feature = "full_crypto")]
pub enum DeriveError {
SoftKeyInPath,
}
#[cfg(feature = "full_crypto")]
impl TraitPair for Pair {
type Public = Public;
type Seed = Seed;
type Signature = Signature;
type DeriveError = DeriveError;
#[cfg(feature = "std")]
fn generate_with_phrase(password: Option<&str>) -> (Pair, String, Seed) {
let mnemonic = Mnemonic::new(MnemonicType::Words12, Language::English);
let phrase = mnemonic.phrase();
let (pair, seed) = Self::from_phrase(phrase, password)
.expect("All phrases generated by Mnemonic are valid; qed");
(
pair,
phrase.to_owned(),
seed,
)
}
#[cfg(feature = "std")]
fn from_phrase(phrase: &str, password: Option<&str>) -> Result<(Pair, Seed), SecretStringError> {
let big_seed = seed_from_entropy(
Mnemonic::from_phrase(phrase, Language::English)
.map_err(|_| SecretStringError::InvalidPhrase)?.entropy(),
password.unwrap_or(""),
).map_err(|_| SecretStringError::InvalidSeed)?;
let mut seed = Seed::default();
seed.copy_from_slice(&big_seed[0..32]);
Self::from_seed_slice(&big_seed[0..32]).map(|x| (x, seed))
}
fn from_seed(seed: &Seed) -> Pair {
Self::from_seed_slice(&seed[..]).expect("seed has valid length; qed")
}
fn from_seed_slice(seed_slice: &[u8]) -> Result<Pair, SecretStringError> {
let secret = ed25519_dalek::SecretKey::from_bytes(seed_slice)
.map_err(|_| SecretStringError::InvalidSeedLength)?;
let public = ed25519_dalek::PublicKey::from(&secret);
Ok(Pair(ed25519_dalek::Keypair { secret, public }))
}
fn derive<Iter: Iterator<Item=DeriveJunction>>(&self,
path: Iter,
_seed: Option<Seed>,
) -> Result<(Pair, Option<Seed>), DeriveError> {
let mut acc = self.0.secret.to_bytes();
for j in path {
match j {
DeriveJunction::Soft(_cc) => return Err(DeriveError::SoftKeyInPath),
DeriveJunction::Hard(cc) => acc = derive_hard_junction(&acc, &cc),
}
}
Ok((Self::from_seed(&acc), Some(acc)))
}
fn public(&self) -> Public {
let mut r = [0u8; 32];
let pk = self.0.public.as_bytes();
r.copy_from_slice(pk);
Public(r)
}
fn sign(&self, message: &[u8]) -> Signature {
let r = self.0.sign(message).to_bytes();
Signature::from_raw(r)
}
fn verify<M: AsRef<[u8]>>(sig: &Self::Signature, message: M, pubkey: &Self::Public) -> bool {
Self::verify_weak(&sig.0[..], message.as_ref(), pubkey)
}
fn verify_weak<P: AsRef<[u8]>, M: AsRef<[u8]>>(sig: &[u8], message: M, pubkey: P) -> bool {
let public_key = match ed25519_dalek::PublicKey::from_bytes(pubkey.as_ref()) {
Ok(pk) => pk,
Err(_) => return false,
};
let sig = match ed25519_dalek::Signature::try_from(sig) {
Ok(s) => s,
Err(_) => return false
};
match public_key.verify(message.as_ref(), &sig) {
Ok(_) => true,
_ => false,
}
}
fn to_raw_vec(&self) -> Vec<u8> {
self.seed().to_vec()
}
}
#[cfg(feature = "full_crypto")]
impl Pair {
pub fn seed(&self) -> &Seed {
self.0.secret.as_bytes()
}
#[cfg(feature = "std")]
pub fn from_legacy_string(s: &str, password_override: Option<&str>) -> Pair {
Self::from_string(s, password_override).unwrap_or_else(|_| {
let mut padded_seed: Seed = [' ' as u8; 32];
let len = s.len().min(32);
padded_seed[..len].copy_from_slice(&s.as_bytes()[..len]);
Self::from_seed(&padded_seed)
})
}
}
impl CryptoType for Public {
#[cfg(feature = "full_crypto")]
type Pair = Pair;
}
impl CryptoType for Signature {
#[cfg(feature = "full_crypto")]
type Pair = Pair;
}
#[cfg(feature = "full_crypto")]
impl CryptoType for Pair {
type Pair = Pair;
}
#[cfg(test)]
mod test {
use super::*;
use hex_literal::hex;
use crate::crypto::DEV_PHRASE;
use serde_json;
#[test]
fn default_phrase_should_be_used() {
assert_eq!(
Pair::from_string("//Alice///password", None).unwrap().public(),
Pair::from_string(&format!("{}//Alice", DEV_PHRASE), Some("password")).unwrap().public(),
);
}
#[test]
fn seed_and_derive_should_work() {
let seed = hex!("9d61b19deffd5a60ba844af492ec2cc44449c5697b326919703bac031cae7f60");
let pair = Pair::from_seed(&seed);
assert_eq!(pair.seed(), &seed);
let path = vec![DeriveJunction::Hard([0u8; 32])];
let derived = pair.derive(path.into_iter(), None).ok().unwrap().0;
assert_eq!(
derived.seed(),
&hex!("ede3354e133f9c8e337ddd6ee5415ed4b4ffe5fc7d21e933f4930a3730e5b21c")
);
}
#[test]
fn test_vector_should_work() {
let pair = Pair::from_seed(
&hex!("9d61b19deffd5a60ba844af492ec2cc44449c5697b326919703bac031cae7f60")
);
let public = pair.public();
assert_eq!(public, Public::from_raw(
hex!("d75a980182b10ab7d54bfed3c964073a0ee172f3daa62325af021a68f707511a")
));
let message = b"";
let signature = hex!("e5564300c360ac729086e2cc806e828a84877f1eb8e5d974d873e065224901555fb8821590a33bacc61e39701cf9b46bd25bf5f0595bbe24655141438e7a100b");
let signature = Signature::from_raw(signature);
assert!(&pair.sign(&message[..]) == &signature);
assert!(Pair::verify(&signature, &message[..], &public));
}
#[test]
fn test_vector_by_string_should_work() {
let pair = Pair::from_string(
"0x9d61b19deffd5a60ba844af492ec2cc44449c5697b326919703bac031cae7f60",
None
).unwrap();
let public = pair.public();
assert_eq!(public, Public::from_raw(
hex!("d75a980182b10ab7d54bfed3c964073a0ee172f3daa62325af021a68f707511a")
));
let message = b"";
let signature = hex!("e5564300c360ac729086e2cc806e828a84877f1eb8e5d974d873e065224901555fb8821590a33bacc61e39701cf9b46bd25bf5f0595bbe24655141438e7a100b");
let signature = Signature::from_raw(signature);
assert!(&pair.sign(&message[..]) == &signature);
assert!(Pair::verify(&signature, &message[..], &public));
}
#[test]
fn generated_pair_should_work() {
let (pair, _) = Pair::generate();
let public = pair.public();
let message = b"Something important";
let signature = pair.sign(&message[..]);
assert!(Pair::verify(&signature, &message[..], &public));
assert!(!Pair::verify(&signature, b"Something else", &public));
}
#[test]
fn seeded_pair_should_work() {
let pair = Pair::from_seed(b"12345678901234567890123456789012");
let public = pair.public();
assert_eq!(public, Public::from_raw(
hex!("2f8c6129d816cf51c374bc7f08c3e63ed156cf78aefb4a6550d97b87997977ee")
));
let message = hex!("2f8c6129d816cf51c374bc7f08c3e63ed156cf78aefb4a6550d97b87997977ee00000000000000000200d75a980182b10ab7d54bfed3c964073a0ee172f3daa62325af021a68f707511a4500000000000000");
let signature = pair.sign(&message[..]);
println!("Correct signature: {:?}", signature);
assert!(Pair::verify(&signature, &message[..], &public));
assert!(!Pair::verify(&signature, "Other message", &public));
}
#[test]
fn generate_with_phrase_recovery_possible() {
let (pair1, phrase, _) = Pair::generate_with_phrase(None);
let (pair2, _) = Pair::from_phrase(&phrase, None).unwrap();
assert_eq!(pair1.public(), pair2.public());
}
#[test]
fn generate_with_password_phrase_recovery_possible() {
let (pair1, phrase, _) = Pair::generate_with_phrase(Some("password"));
let (pair2, _) = Pair::from_phrase(&phrase, Some("password")).unwrap();
assert_eq!(pair1.public(), pair2.public());
}
#[test]
fn password_does_something() {
let (pair1, phrase, _) = Pair::generate_with_phrase(Some("password"));
let (pair2, _) = Pair::from_phrase(&phrase, None).unwrap();
assert_ne!(pair1.public(), pair2.public());
}
#[test]
fn ss58check_roundtrip_works() {
let pair = Pair::from_seed(b"12345678901234567890123456789012");
let public = pair.public();
let s = public.to_ss58check();
println!("Correct: {}", s);
let cmp = Public::from_ss58check(&s).unwrap();
assert_eq!(cmp, public);
}
#[test]
fn signature_serialization_works() {
let pair = Pair::from_seed(b"12345678901234567890123456789012");
let message = b"Something important";
let signature = pair.sign(&message[..]);
let serialized_signature = serde_json::to_string(&signature).unwrap();
assert_eq!(serialized_signature.len(), 130);
let signature = serde_json::from_str(&serialized_signature).unwrap();
assert!(Pair::verify(&signature, &message[..], &pair.public()));
}
#[test]
fn signature_serialization_doesnt_panic() {
fn deserialize_signature(text: &str) -> Result<Signature, serde_json::error::Error> {
Ok(serde_json::from_str(text)?)
}
assert!(deserialize_signature("Not valid json.").is_err());
assert!(deserialize_signature("\"Not an actual signature.\"").is_err());
assert!(deserialize_signature("\"abc123\"").is_err());
}
}