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falcon signature verification with public key digest result
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49 changes: 49 additions & 0 deletions
49
ethereum/core/src/main/java/org/hyperledger/besu/ethereum/mainnet/LacchainProtocolSpecs.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,49 @@ | ||
| /* | ||
| * Copyright IADB. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with | ||
| * the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on | ||
| * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the | ||
| * specific language governing permissions and limitations under the License. | ||
| * | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
| package org.hyperledger.besu.ethereum.mainnet; | ||
|
|
||
| import org.hyperledger.besu.datatypes.Address; | ||
| import org.hyperledger.besu.evm.internal.EvmConfiguration; | ||
| import org.hyperledger.besu.evm.precompile.FalconPrecompiledContract; | ||
| import org.hyperledger.besu.evm.precompile.PrecompileContractRegistry; | ||
|
|
||
| import java.math.BigInteger; | ||
| import java.util.Optional; | ||
| import java.util.OptionalInt; | ||
|
|
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| public class LacchainProtocolSpecs { | ||
| public static ProtocolSpecBuilder postQuantumDefinition( | ||
| final Optional<BigInteger> chainId, | ||
| final OptionalInt contractSizeLimit, | ||
| final OptionalInt configStackSizeLimit, | ||
| final boolean enableRevertReason) { | ||
| return MainnetProtocolSpecs.istanbulDefinition( | ||
| chainId, | ||
| contractSizeLimit, | ||
| configStackSizeLimit, | ||
| enableRevertReason, | ||
| EvmConfiguration.DEFAULT) | ||
| .precompileContractRegistryBuilder( | ||
| precompiledContractConfiguration -> { | ||
| PrecompileContractRegistry lacchainContractsRegistry = | ||
| MainnetPrecompiledContractRegistries.istanbul(precompiledContractConfiguration); | ||
| lacchainContractsRegistry.put( | ||
| Address.LACCHAIN_FALCON, | ||
| new FalconPrecompiledContract( | ||
| precompiledContractConfiguration.getGasCalculator())); | ||
| return lacchainContractsRegistry; | ||
| }); | ||
| } | ||
| } |
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94 changes: 94 additions & 0 deletions
94
evm/src/main/java/org/hyperledger/besu/evm/precompile/FalconPrecompiledContract.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| /* | ||
| * Copyright IADB. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with | ||
| * the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on | ||
| * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the | ||
| * specific language governing permissions and limitations under the License. | ||
| * | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
| package org.hyperledger.besu.evm.precompile; | ||
|
|
||
| import static java.nio.charset.StandardCharsets.UTF_8; | ||
|
|
||
| import org.hyperledger.besu.crypto.Hash; | ||
| import org.hyperledger.besu.evm.frame.MessageFrame; | ||
| import org.hyperledger.besu.evm.gascalculator.GasCalculator; | ||
|
|
||
| import javax.annotation.Nonnull; | ||
|
|
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| import org.apache.tuweni.bytes.Bytes; | ||
| import org.apache.tuweni.bytes.Bytes32; | ||
| import org.bouncycastle.pqc.crypto.falcon.FalconParameters; | ||
| import org.bouncycastle.pqc.crypto.falcon.FalconPublicKeyParameters; | ||
| import org.bouncycastle.pqc.crypto.falcon.FalconSigner; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
|
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| public class FalconPrecompiledContract extends AbstractPrecompiledContract { | ||
|
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| private static final Logger LOG = LoggerFactory.getLogger(AbstractBLS12PrecompiledContract.class); | ||
|
|
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| private static final Bytes METHOD_ABI = | ||
| Hash.keccak256(Bytes.of("verify(bytes,bytes,bytes32)".getBytes(UTF_8))).slice(0, 4); | ||
| private static final String SIGNATURE_ALGORITHM = "Falcon-512"; | ||
|
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| private final FalconSigner falconSigner = new FalconSigner(); | ||
|
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| public FalconPrecompiledContract(final GasCalculator gasCalculator) { | ||
| super("Falcon", gasCalculator); | ||
| } | ||
|
|
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| @Override | ||
| public long gasRequirement(final Bytes input) { | ||
| long value = gasCalculator().getFrecPrecompiledContractGasCost(); | ||
| LOG.debug("Gas requirement calculation for Falcon has been called {}", value); | ||
| return value; | ||
| } | ||
|
|
||
| @Nonnull | ||
| @Override | ||
| public PrecompileContractResult computePrecompile( | ||
| final Bytes methodInput, @Nonnull final MessageFrame messageFrame) { | ||
| Bytes methodAbi = methodInput.slice(0, METHOD_ABI.size()); | ||
| if (!methodAbi.xor(METHOD_ABI).isZero()) { | ||
| throw new IllegalArgumentException("Unexpected method ABI: " + methodAbi.toHexString()); | ||
| } | ||
| Bytes input = methodInput.slice(METHOD_ABI.size()); | ||
| int signatureOffset = input.slice(0, 32).trimLeadingZeros().toInt(); | ||
| int pubKeyOffset = input.slice(32, 32).trimLeadingZeros().toInt(); | ||
|
|
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| int signatureLength = input.slice(signatureOffset, 32).trimLeadingZeros().toInt(); | ||
| int pubKeyLength = input.slice(pubKeyOffset, 32).trimLeadingZeros().toInt(); | ||
| int dataLength = 32; | ||
|
|
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| Bytes signatureSlice = input.slice(signatureOffset + 32, signatureLength); | ||
| Bytes pubKeySlice = input.slice(pubKeyOffset + 32 + 1, pubKeyLength - 1); | ||
| Bytes dataSlice = input.slice(64, dataLength); | ||
|
|
||
| if (LOG.isTraceEnabled()) { | ||
| LOG.trace( | ||
| "{} verify: signature={}, pubKey={}, data={}", | ||
| SIGNATURE_ALGORITHM, | ||
| signatureSlice.toHexString(), | ||
| pubKeySlice.toHexString(), | ||
| dataSlice.toHexString()); | ||
| } | ||
| FalconPublicKeyParameters falconPublicKeyParameters = | ||
| new FalconPublicKeyParameters(FalconParameters.falcon_512, pubKeySlice.toArray()); | ||
| falconSigner.init(false, falconPublicKeyParameters); | ||
| final boolean verifies = | ||
| falconSigner.verifySignature(dataSlice.toArray(), signatureSlice.toArray()); | ||
| if (verifies) { | ||
| Bytes digest = Hash.shake256(input.slice(pubKeyOffset + 32, pubKeyLength), 32); | ||
| return PrecompileContractResult.success(Bytes32.leftPad(digest)); | ||
| } else { | ||
| return PrecompileContractResult.success(Bytes32.leftPad(Bytes.of(0))); | ||
| } | ||
| } | ||
| } |
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