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| 1 | +/* |
| 2 | + * |
| 3 | + * Copyright 2016,2017 DTCC, Fujitsu Australia Software Technology, IBM - All Rights Reserved. |
| 4 | + * |
| 5 | + * Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | + * you may not use this file except in compliance with the License. |
| 7 | + * You may obtain a copy of the License at |
| 8 | + * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | + * Unless required by applicable law or agreed to in writing, software |
| 10 | + * distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | + * See the License for the specific language governing permissions and |
| 13 | + * limitations under the License. |
| 14 | + * |
| 15 | + */ |
| 16 | + |
| 17 | +package org.hyperledger.fabric.sdk; |
| 18 | + |
| 19 | +import java.io.ByteArrayOutputStream; |
| 20 | +import java.io.IOException; |
| 21 | +import java.util.Collection; |
| 22 | +import java.util.HashMap; |
| 23 | +import java.util.HashSet; |
| 24 | +import java.util.Set; |
| 25 | + |
| 26 | +import com.google.protobuf.ByteString; |
| 27 | +import org.bouncycastle.asn1.ASN1Integer; |
| 28 | +import org.bouncycastle.asn1.DEROctetString; |
| 29 | +import org.bouncycastle.asn1.DERSequenceGenerator; |
| 30 | +import org.hyperledger.fabric.sdk.exception.InvalidArgumentException; |
| 31 | +import org.hyperledger.fabric.sdk.security.CryptoSuite; |
| 32 | + |
| 33 | +public class SDKUtils { |
| 34 | + |
| 35 | + public static CryptoSuite suite = null; |
| 36 | + |
| 37 | + /** |
| 38 | + * used asn1 and get hash |
| 39 | + * |
| 40 | + * @param blockNumber |
| 41 | + * @param previousHash |
| 42 | + * @param dataHash |
| 43 | + * @return byte[] |
| 44 | + * @throws IOException |
| 45 | + * @throws InvalidArgumentException |
| 46 | + */ |
| 47 | + public static byte[] calculateBlockHash(long blockNumber, byte[] previousHash, byte[] dataHash) throws IOException, InvalidArgumentException { |
| 48 | + |
| 49 | + if (previousHash == null) { |
| 50 | + throw new InvalidArgumentException("previousHash parameter is null."); |
| 51 | + } |
| 52 | + if (dataHash == null) { |
| 53 | + throw new InvalidArgumentException("dataHash parameter is null."); |
| 54 | + } |
| 55 | + |
| 56 | + if (null == suite) { |
| 57 | + suite = CryptoSuite.Factory.getCryptoSuite(); |
| 58 | + } |
| 59 | + |
| 60 | + ByteArrayOutputStream s = new ByteArrayOutputStream(); |
| 61 | + DERSequenceGenerator seq = new DERSequenceGenerator(s); |
| 62 | + seq.addObject(new ASN1Integer(blockNumber)); |
| 63 | + seq.addObject(new DEROctetString(previousHash)); |
| 64 | + seq.addObject(new DEROctetString(dataHash)); |
| 65 | + seq.close(); |
| 66 | + return suite.hash(s.toByteArray()); |
| 67 | + |
| 68 | + } |
| 69 | + |
| 70 | + /** |
| 71 | + * Check that the proposals all have consistent read write sets |
| 72 | + * |
| 73 | + * @param proposalResponses |
| 74 | + * @return A Collection of sets where each set has consistent proposals. |
| 75 | + * @throws InvalidArgumentException |
| 76 | + */ |
| 77 | + |
| 78 | + public static Collection<Set<ProposalResponse>> getProposalConsistencySets(Collection<ProposalResponse> proposalResponses) throws InvalidArgumentException { |
| 79 | + |
| 80 | + if (proposalResponses == null) { |
| 81 | + throw new InvalidArgumentException("proposalResponses collection is null"); |
| 82 | + } |
| 83 | + |
| 84 | + if (proposalResponses.isEmpty()) { |
| 85 | + throw new InvalidArgumentException("proposalResponses collection is empty"); |
| 86 | + } |
| 87 | + |
| 88 | + HashMap<ByteString, Set<ProposalResponse>> ret = new HashMap<>(); |
| 89 | + |
| 90 | + for (ProposalResponse proposalResponse : proposalResponses) { |
| 91 | + |
| 92 | + ByteString rwsetByteString = proposalResponse.getProposalResponsePayloadDeserializer() |
| 93 | + .getExtension().getChaincodeAction().getResults(); |
| 94 | + |
| 95 | + Set<ProposalResponse> set = ret.computeIfAbsent(rwsetByteString, k -> new HashSet<>()); |
| 96 | + |
| 97 | + set.add(proposalResponse); |
| 98 | + |
| 99 | + } |
| 100 | + |
| 101 | + return ret.values(); |
| 102 | + |
| 103 | + } |
| 104 | +} |
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