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[refactor] hyperledger-iroha#3237: migrate iroha_crypto to use k256
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This makes all the dependency tree of iroha_crypto wasm-compatible (except `getrandom`, which either requires a "js" feature enabled when used from web, or a custom getrandom implementation in other cases)

Signed-off-by: Nikita Strygin <[email protected]>
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@DCNick3
DCNick3 committed Nov 8, 2023
1 parent f73f323 commit 27298dc
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Showing 4 changed files with 101 additions and 73 deletions.
10 changes: 9 additions & 1 deletion Cargo.lock
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10 changes: 9 additions & 1 deletion crypto/Cargo.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -16,8 +16,10 @@ default = ["std"]
# Please refer to https://docs.rust-embedded.org/book/intro/no-std.html
std = [
"dep:blake2",
"dep:digest",
"dep:sha2",
"dep:hkdf",
"dep:amcl",
"dep:amcl_wrapper",
"dep:ed25519-dalek",
"dep:curve25519-dalek",
Expand All @@ -29,6 +31,7 @@ std = [
"dep:arrayref",
"dep:aead",
"dep:chacha20poly1305",
"dep:elliptic-curve",
"dep:k256",
]
# Force static linking
Expand All @@ -50,12 +53,16 @@ parity-scale-codec = { workspace = true, features = ["derive", "full"] }
serde = { workspace = true, features = ["derive"] }
serde_with = { workspace = true, features = ["macros"] }
hex = { workspace = true, features = ["alloc", "serde"] }
# TODO: iroha_crypto no longer depends on openssl (did it ever?)
# currently it's being used by iroha_client through attohttpc and iroha_cli through warp's tokeio-tunstenite
openssl-sys = { version = "0.9.93", features = ["vendored"], optional = true }
getset = { workspace = true }

digest = { version = "0.10.7", optional = true }
blake2 = { version = "0.10.6", optional = true }
sha2 = { version = "0.10.8", optional = true }
hkdf = { version = "0.12.3", optional = true }
amcl = { version = "0.2.0", optional = true, default-features = false, features = ["secp256k1"] }
amcl_wrapper = { version = "0.4.0", optional = true }

ed25519-dalek = { version = "2.0.0", optional = true, features = ["rand_core"] }
Expand All @@ -73,7 +80,8 @@ arrayref = { version = "0.3.7", optional = true }
aead = { workspace = true, optional = true }
chacha20poly1305 = { version = "0.10.1", optional = true }

k256 = { version = "0.13.1", optional = true, features = ["ecdh", "ecdsa", "sha256"]}
elliptic-curve = { version = "0.13.6", optional = true }
k256 = { version = "0.13.1", optional = true, features = ["ecdsa", "sha256"]}

[dev-dependencies]
hex-literal = { workspace = true }
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150 changes: 81 additions & 69 deletions crypto/src/signature/secp256k1.rs
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Original file line number Diff line number Diff line change
@@ -1,14 +1,12 @@
// TODO: clean up & remove
#![allow(missing_docs)]

use rand::rngs::OsRng;
use sha2::digest::generic_array::typenum::U32;
#![allow(missing_docs, unused)]

use crate::{Algorithm, Error, KeyGenOption, PrivateKey, PublicKey};

pub const PRIVATE_KEY_SIZE: usize = 32;
pub const PUBLIC_KEY_SIZE: usize = 33;
pub const SIGNATURE_SIZE: usize = 64;
pub const PUBLIC_UNCOMPRESSED_KEY_SIZE: usize = 65;

const ALGORITHM: Algorithm = Algorithm::Secp256k1;

Expand Down Expand Up @@ -45,30 +43,64 @@ impl EcdsaSecp256k1Sha256 {
}

mod ecdsa_secp256k1 {
use amcl::secp256k1::ecp;
use arrayref::array_ref;
use digest::{consts::U32, Digest};
use ed25519_dalek::{Signer, Verifier};
use elliptic_curve::sec1::FromEncodedPoint;
use iroha_primitives::const_vec::ConstVec;
use rand::{RngCore, SeedableRng};
use k256;
use rand::{rngs::OsRng, RngCore, SeedableRng};
use rand_chacha::ChaChaRng;
use secp256k1;
use sha2::Digest;
use zeroize::Zeroize;

use super::*;
use super::{ALGORITHM, PRIVATE_KEY_SIZE, PUBLIC_KEY_SIZE, PUBLIC_UNCOMPRESSED_KEY_SIZE};
use crate::{Error, KeyGenOption, PrivateKey, PublicKey};

pub struct EcdsaSecp256k1Impl(secp256k1::Secp256k1<secp256k1::All>);
pub struct EcdsaSecp256k1Impl;

impl EcdsaSecp256k1Impl {
pub fn public_key_compressed(&self, pk: &PublicKey) -> Vec<u8> {
assert_eq!(pk.digest_function, ALGORITHM);
let mut compressed = [0u8; PUBLIC_KEY_SIZE];
ecp::ECP::frombytes(&pk.payload[..]).tobytes(&mut compressed, true);
compressed.to_vec()
}

pub fn public_key_uncompressed(&self, pk: &PublicKey) -> Vec<u8> {
assert_eq!(pk.digest_function, ALGORITHM);
let mut uncompressed = [0u8; PUBLIC_UNCOMPRESSED_KEY_SIZE];
ecp::ECP::frombytes(&pk.payload[..]).tobytes(&mut uncompressed, false);
uncompressed.to_vec()
}

pub fn parse(&self, data: &[u8]) -> Result<PublicKey, Error> {
match data.len() {
PUBLIC_KEY_SIZE => Ok(PublicKey {
digest_function: ALGORITHM,
payload: ConstVec::new(data.to_vec()),
}),
PUBLIC_UNCOMPRESSED_KEY_SIZE => {
let mut compressed = [0u8; PUBLIC_KEY_SIZE];
ecp::ECP::frombytes(data).tobytes(&mut compressed, true);
Ok(PublicKey {
digest_function: ALGORITHM,
payload: ConstVec::new(compressed.to_vec()),
})
}
_ => Err(Error::Parse("Invalid key length".to_string())),
}
}

pub fn new() -> Self {
Self(secp256k1::Secp256k1::new())
Self {}
}
pub(crate) fn keypair<D>(

pub fn keypair<D: Digest<OutputSize = U32>>(
&self,
option: Option<KeyGenOption>,
) -> Result<(PublicKey, PrivateKey), Error>
where
D: Digest<OutputSize = U32>,
{
let sk = match option {
) -> Result<(PublicKey, PrivateKey), Error> {
let signing_key = match option {
Some(mut o) => match o {
KeyGenOption::UseSeed(ref mut seed) => {
let mut s = [0u8; PRIVATE_KEY_SIZE];
Expand All @@ -77,44 +109,43 @@ mod ecdsa_secp256k1 {
rng.fill_bytes(&mut s);
let k = D::digest(&s);
s.zeroize();
secp256k1::SecretKey::from_slice(k.as_slice())?
k256::SecretKey::from_slice(k.as_slice())?
}
KeyGenOption::FromPrivateKey(ref s) => {
assert_eq!(s.digest_function, ALGORITHM);
secp256k1::SecretKey::from_slice(&s.payload[..])?
k256::SecretKey::from_slice(&s.payload[..])?
}
},
None => {
let mut s = [0u8; PRIVATE_KEY_SIZE];
OsRng.fill_bytes(&mut s);
let k = D::digest(&s);
s.zeroize();
secp256k1::SecretKey::from_slice(k.as_slice())?
}
None => k256::SecretKey::random(&mut OsRng),
};
let pk = secp256k1::PublicKey::from_secret_key(&self.0, &sk);

let public_key = signing_key.public_key();
let compressed = public_key.to_sec1_bytes(); //serialized as compressed point
Ok((
PublicKey {
digest_function: ALGORITHM,
payload: ConstVec::new(pk.serialize().to_vec()),
payload: ConstVec::new(compressed),
},
PrivateKey {
digest_function: ALGORITHM,
payload: ConstVec::new(sk[..].to_vec()),
payload: ConstVec::new(signing_key.to_bytes().to_vec()),
},
))
}

pub fn sign<D>(&self, message: &[u8], sk: &PrivateKey) -> Result<Vec<u8>, Error>
where
D: Digest<OutputSize = U32>,
{
assert_eq!(sk.digest_function, ALGORITHM);
let h = D::digest(message);
let msg = secp256k1::Message::from_digest_slice(h.as_slice())?;
let s = secp256k1::SecretKey::from_slice(&sk.payload[..])?;
let sig = self.0.sign_ecdsa(&msg, &s);
Ok(sig.serialize_compact().to_vec())
let signing_key = k256::SecretKey::from_slice(&sk.payload[..])
.map_err(|e| Error::Signing(format!("{:?}", e)))?;
let signing_key = k256::ecdsa::SigningKey::from(signing_key);

let signature: k256::ecdsa::Signature = signing_key.sign(message);
Ok(signature.to_bytes().to_vec())
}

pub fn verify<D>(
&self,
message: &[u8],
Expand All @@ -124,50 +155,31 @@ mod ecdsa_secp256k1 {
where
D: Digest<OutputSize = U32>,
{
assert_eq!(pk.digest_function, ALGORITHM);
let h = D::digest(message);
let msg = secp256k1::Message::from_digest_slice(h.as_slice())?;
let p = secp256k1::PublicKey::from_slice(&pk.payload[..])?;
let sig = secp256k1::ecdsa::Signature::from_compact(signature)?;
let res = self.0.verify_ecdsa(&msg, &sig, &p);
match res {
Ok(()) => Ok(true),
Err(secp256k1::Error::IncorrectSignature) => Ok(false),
Err(err) => Err(Error::from(err)),
}
let compressed_pk = self.public_key_compressed(pk);
let verifying_key = k256::PublicKey::from_sec1_bytes(&compressed_pk)
.map_err(|e| Error::Signing(format!("{:?}", e)))?;
let signature = k256::ecdsa::Signature::from_slice(signature)
.map_err(|e| Error::Signing(format!("{:?}", e)))?;

let verifying_key = k256::ecdsa::VerifyingKey::from(verifying_key);

Ok(verifying_key.verify(message, &signature).is_ok())
}

pub fn normalize_s(&self, signature: &mut [u8]) -> Result<(), Error> {
let mut sig = secp256k1::ecdsa::Signature::from_compact(signature)?;
let mut sig = k256::ecdsa::Signature::from_slice(signature)
.map_err(|e| Error::Signing(format!("{:?}", e)))?;
sig.normalize_s();
let compact = sig.serialize_compact();
signature.clone_from_slice(&compact[..]);
signature.copy_from_slice(&sig.to_bytes());
Ok(())
}
}
}

impl From<secp256k1::Error> for Error {
fn from(error: secp256k1::Error) -> Error {
match error {
secp256k1::Error::IncorrectSignature => Error::Parse("Incorrect Signature".to_string()),
secp256k1::Error::InvalidMessage => Error::Parse("Invalid Message".to_string()),
secp256k1::Error::InvalidPublicKey => Error::Parse("Invalid Public Key".to_string()),
secp256k1::Error::InvalidSignature => Error::Parse("Invalid Signature".to_string()),
secp256k1::Error::InvalidSecretKey => Error::Parse("Invalid Secret Key".to_string()),
secp256k1::Error::InvalidRecoveryId => Error::Parse("Invalid Recovery Id".to_string()),
secp256k1::Error::InvalidTweak => Error::Parse("Invalid Tweak".to_string()),
secp256k1::Error::NotEnoughMemory => Error::Parse("Not Enough Memory".to_string()),
secp256k1::Error::InvalidSharedSecret => {
Error::Parse("Invalid Shared Secret".to_string())
}
secp256k1::Error::InvalidPublicKeySum => {
Error::Parse("Invalid Public Key Sum".to_string())
}
secp256k1::Error::InvalidParityValue(e) => {
Error::Parse(format!("Invalid Parity Value: {}", e))
}
secp256k1::Error::InvalidEllSwift => Error::Parse("Invalid Ell Swift".to_string()),
}
impl From<elliptic_curve::Error> for Error {
fn from(error: elliptic_curve::Error) -> Error {
// rust crypto doesn't expose any kind of error information..
Error::Other(format!("{}", error))
}
}

Expand Down
4 changes: 2 additions & 2 deletions p2p/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -71,8 +71,8 @@ pub enum CryptographicError {
/// Encryption failed
#[from(ignore)]
Encrypt(aead::Error),
/// Ursa Cryptography error
Ursa(CryptoError),
/// Cryptography error
Crypto(CryptoError),
}

impl<T: Into<CryptographicError>> From<T> for Error {
Expand Down

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