Passkey: check account signature on passkey (#2036)

Go after #2037 

# Goal
The goal of this PR is to setup functions and tests for account
signature checks

Part of: #2028 

# Checklist
- [ ] Chain spec updated
- [ ] Custom RPC OR Runtime API added/changed? Updated js/api-augment.
- [ ] Design doc(s) updated
- [x] Tests added
- [ ] Benchmarks added
- [ ] Weights updated

pallets/passkey/Cargo.toml

@@ -21,6 +21,8 @@ sp-std = { workspace = true }
 frame-benchmarking = { workspace = true, optional = true }
 sp-core = { workspace = true }
 log = { workspace = true, default-features = false }
+
+# Frequency related dependencies
 common-primitives = { default-features = false, path = "../../common/primitives" }
 
 [dev-dependencies]

pallets/passkey/src/lib.rs

@@ -23,7 +23,8 @@ use frame_support::{
 	traits::IsSubType,
 };
 use frame_system::pallet_prelude::*;
-use sp_runtime::traits::Dispatchable;
+use sp_runtime::traits::{Convert, Dispatchable, Verify};
+use sp_std::vec::Vec;
 
 #[cfg(test)]
 mod mock;
@@ -44,6 +45,9 @@ pub use module::*;
 
 #[frame_support::pallet]
 pub mod module {
+	use common_primitives::utils::wrap_binary_data;
+	use sp_runtime::{AccountId32, MultiSignature};
+
 	use super::*;
 
 	/// the storage version for this pallet
@@ -64,12 +68,15 @@ pub mod module {
 
 		/// Weight information for extrinsics in this pallet.
 		type WeightInfo: WeightInfo;
+
+		/// AccountId truncated to 32 bytes
+		type ConvertIntoAccountId32: Convert<Self::AccountId, AccountId32>;
 	}
 
 	#[pallet::error]
 	pub enum Error<T> {
-		/// PlaceHolder error
-		PlaceHolderError,
+		/// InvalidAccountSignature
+		InvalidAccountSignature,
 	}
 
 	#[pallet::event]
@@ -119,13 +126,54 @@ pub mod module {
 	#[pallet::validate_unsigned]
 	impl<T: Config> ValidateUnsigned for Pallet<T> {
 		type Call = Call<T>;
-		fn validate_unsigned(
-			_source: TransactionSource,
-			_call: &Self::Call,
-		) -> TransactionValidity {
+		fn validate_unsigned(_source: TransactionSource, call: &Self::Call) -> TransactionValidity {
+			Self::validate_signatures(call)?;
 			Ok(ValidTransaction::default())
 		}
 	}
+
+	impl<T: Config> Pallet<T> {
+		fn validate_signatures(call: &Call<T>) -> TransactionValidity {
+			match call {
+				Call::proxy { payload } => {
+					let signed_data = payload.passkey_public_key;
+					let signature = payload.passkey_call.account_ownership_proof.clone();
+					let signer = &payload.passkey_call.account_id;
+					match Self::check_account_signature(signer, &signed_data.into(), &signature) {
+						Ok(_) => Ok(ValidTransaction::default()),
+						Err(_e) => InvalidTransaction::BadSigner.into(),
+					}
+				},
+				_ => InvalidTransaction::Call.into(),
+			}
+		}
+
+		/// Check the signature on passkey public key by the account id
+		/// Returns Ok(()) if the signature is valid
+		/// Returns Err(InvalidAccountSignature) if the signature is invalid
+		/// # Arguments
+		/// * `signer` - The account id of the signer
+		/// * `signed_data` - The signed data
+		/// * `signature` - The signature
+		/// # Return
+		/// * `Ok(())` if the signature is valid
+		/// * `Err(InvalidAccountSignature)` if the signature is invalid
+		fn check_account_signature(
+			signer: &T::AccountId,
+			signed_data: &Vec<u8>,
+			signature: &MultiSignature,
+		) -> DispatchResult {
+			let key: AccountId32 = T::ConvertIntoAccountId32::convert((*signer).clone());
+			let signed_payload: Vec<u8> = wrap_binary_data(signed_data.clone().into());
+
+			let verified = signature.verify(&signed_payload[..], &key);
+			if verified {
+				Ok(())
+			} else {
+				Err(Error::<T>::InvalidAccountSignature.into())
+			}
+		}
+	}
 }
 
 impl<T: Config> Pallet<T> {}

pallets/passkey/src/mock.rs

@@ -1,12 +1,13 @@
 //! Mocks for the Passkey module.
-
-use super::*;
 use frame_support::{
 	construct_runtime,
 	traits::{ConstU32, ConstU64, Everything},
 };
 use sp_core::H256;
-use sp_runtime::{traits::IdentityLookup, BuildStorage};
+use sp_runtime::{
+	traits::{ConvertInto, IdentityLookup},
+	BuildStorage,
+};
 
 use crate as pallet_passkey;
 
@@ -49,10 +50,11 @@ impl frame_system::Config for Test {
 	type MaxConsumers = ConstU32<16>;
 }
 
-impl Config for Test {
+impl pallet_passkey::Config for Test {
 	type RuntimeEvent = RuntimeEvent;
 	type WeightInfo = ();
 	type RuntimeCall = RuntimeCall;
+	type ConvertIntoAccountId32 = ConvertInto;
 }
 
 impl pallet_balances::Config for Test {

pallets/passkey/src/tests.rs

@@ -1,5 +1,6 @@
 //! Unit tests for the passkey module.
 use super::*;
+use common_primitives::utils::wrap_binary_data;
 use frame_support::{assert_noop, assert_ok};
 use frame_system::Call as SystemCall;
 use mock::*;
@@ -13,8 +14,10 @@ fn proxy_call_with_signed_origin_should_fail() {
 		// arrange
 		let (test_account_1_key_pair, _) = sr25519::Pair::generate();
 		let (test_account_2_key_pair, _) = sr25519::Pair::generate();
-
-		let signature: MultiSignature = test_account_1_key_pair.sign(b"sdsds").into();
+		let passkey_public_key = [0u8; 33];
+		let wrapped_binary = wrap_binary_data(passkey_public_key.to_vec());
+		let signature: MultiSignature =
+			test_account_1_key_pair.sign(wrapped_binary.as_slice()).into();
 		let call: PasskeyCall<Test> = PasskeyCall {
 			account_id: test_account_1_key_pair.public().into(),
 			account_nonce: 3,
@@ -25,7 +28,7 @@ fn proxy_call_with_signed_origin_should_fail() {
 			})),
 		};
 		let payload = PasskeyPayload {
-			passkey_public_key: [0u8; 33],
+			passkey_public_key,
 			verifiable_passkey_signature: VerifiablePasskeySignature {
 				signature: PasskeySignature::default(),
 				client_data_json: PasskeyClientDataJson::default(),
@@ -47,15 +50,18 @@ fn proxy_call_with_unsigned_origin_should_work() {
 	new_test_ext().execute_with(|| {
 		// arrange
 		let (test_account_1_key_pair, _) = sr25519::Pair::generate();
-		let signature: MultiSignature = test_account_1_key_pair.sign(b"sdsds").into();
+		let passkey_public_key = [0u8; 33];
+		let wrapped_binary = wrap_binary_data(passkey_public_key.to_vec());
+		let signature: MultiSignature =
+			test_account_1_key_pair.sign(wrapped_binary.as_slice()).into();
 		let call: PasskeyCall<Test> = PasskeyCall {
 			account_id: test_account_1_key_pair.public().into(),
 			account_nonce: 3,
 			account_ownership_proof: signature,
 			call: Box::new(RuntimeCall::System(SystemCall::remark { remark: vec![1, 2, 3u8] })),
 		};
 		let payload = PasskeyPayload {
-			passkey_public_key: [0u8; 33],
+			passkey_public_key,
 			verifiable_passkey_signature: VerifiablePasskeySignature {
 				signature: PasskeySignature::default(),
 				client_data_json: PasskeyClientDataJson::default(),
@@ -68,3 +74,33 @@ fn proxy_call_with_unsigned_origin_should_work() {
 		assert_ok!(Passkey::proxy(RuntimeOrigin::none(), payload));
 	});
 }
+
+#[test]
+fn test_proxy_call_with_bad_signature_should_fail() {
+	new_test_ext().execute_with(|| {
+		// arrange
+		let (test_account_1_key_pair, _) = sr25519::Pair::generate();
+		let passkey_public_key = [0u8; 33];
+		let wrapped_binary = wrap_binary_data("bad data".as_bytes().to_vec());
+		let signature: MultiSignature =
+			test_account_1_key_pair.sign(wrapped_binary.as_slice()).into();
+		let call: PasskeyCall<Test> = PasskeyCall {
+			account_id: test_account_1_key_pair.public().into(),
+			account_nonce: 3,
+			account_ownership_proof: signature,
+			call: Box::new(RuntimeCall::System(SystemCall::remark { remark: vec![1, 2, 3u8] })),
+		};
+		let payload = PasskeyPayload {
+			passkey_public_key,
+			verifiable_passkey_signature: VerifiablePasskeySignature {
+				signature: PasskeySignature::default(),
+				client_data_json: PasskeyClientDataJson::default(),
+				authenticator_data: PasskeyAuthenticatorData::default(),
+			},
+			passkey_call: call,
+		};
+		let res = Passkey::validate_unsigned(TransactionSource::InBlock, &Call::proxy { payload });
+		// assert
+		assert_eq!(res, InvalidTransaction::BadSigner.into());
+	});
+}

runtime/frequency/src/lib.rs

@@ -343,7 +343,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	spec_name: create_runtime_str!("frequency"),
 	impl_name: create_runtime_str!("frequency"),
 	authoring_version: 1,
-	spec_version: 86,
+	spec_version: 87,
 	impl_version: 0,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 1,
@@ -357,7 +357,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	spec_name: create_runtime_str!("frequency-testnet"),
 	impl_name: create_runtime_str!("frequency"),
 	authoring_version: 1,
-	spec_version: 86,
+	spec_version: 87,
 	impl_version: 0,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 1,
@@ -913,6 +913,7 @@ impl pallet_passkey::Config for Runtime {
 	type RuntimeEvent = RuntimeEvent;
 	type RuntimeCall = RuntimeCall;
 	type WeightInfo = pallet_passkey::weights::SubstrateWeight<Runtime>;
+	type ConvertIntoAccountId32 = ConvertInto;
 }
 
 #[cfg(any(not(feature = "frequency-no-relay"), feature = "frequency-lint-check"))]