public void SignTwoDataAndAggregateVerify() { // Arrange var privateKey1 = HexMate.Convert.FromHexString(PrivateKeys[1]); var privateKey2 = HexMate.Convert.FromHexString(PrivateKeys[2]); var messageData1 = MessageData[1]; var messageData2 = MessageData[2]; Console.WriteLine("Input:"); Console.WriteLine("Private Key 1: [{0}] {1}", privateKey1.Length, HexMate.Convert.ToHexString(privateKey1)); Console.WriteLine("MessageData 1: [{0}] {1}", messageData1.Length, HexMate.Convert.ToHexString(messageData1)); Console.WriteLine("Private Key 2: [{0}] {1}", privateKey2.Length, HexMate.Convert.ToHexString(privateKey2)); Console.WriteLine("MessageData 2: [{0}] {1}", messageData2.Length, HexMate.Convert.ToHexString(messageData2)); // Sign 1 using var bls1 = new BLSHerumi(new BLSParameters() { PrivateKey = privateKey1 }); var signature1 = new byte[96]; _ = bls1.TrySignData(messageData1, signature1.AsSpan(), out var _); Console.WriteLine("Signature 1: [{0}] {1}", signature1.Length, HexMate.Convert.ToHexString(signature1)); var publicKey1 = new byte[48]; _ = bls1.TryExportBlsPublicKey(publicKey1, out var _); Console.WriteLine("Public Key 1: [{0}] {1}", publicKey1.Length, HexMate.Convert.ToHexString(publicKey1)); // Sign 2 using var bls2 = new BLSHerumi(new BLSParameters() { PrivateKey = privateKey2 }); var signature2 = new byte[96]; _ = bls2.TrySignData(messageData2, signature2.AsSpan(), out var _); Console.WriteLine("Signature 2: [{0}] {1}", signature2.Length, HexMate.Convert.ToHexString(signature2)); var publicKey2 = new byte[48]; _ = bls2.TryExportBlsPublicKey(publicKey2, out var _); Console.WriteLine("Public Key 2: [{0}] {1}", publicKey2.Length, HexMate.Convert.ToHexString(publicKey2)); // Concatenate public keys var publicKeys = new Span <byte>(new byte[48 * 2]); publicKey1.CopyTo(publicKeys); publicKey2.CopyTo(publicKeys.Slice(48)); // Aggregate signatures var signatures = new Span <byte>(new byte[96 * 2]); signature1.CopyTo(signatures); signature2.CopyTo(signatures.Slice(96)); using var blsAggregate = new BLSHerumi(new BLSParameters()); var aggregateSignature = new byte[96]; blsAggregate.TryAggregateSignatures(signatures, aggregateSignature, out var _); Console.WriteLine("Aggregate Signature: [{0}] {1}", aggregateSignature.Length, HexMate.Convert.ToHexString(aggregateSignature)); // Concatenate data var data = new Span <byte>(new byte[32 * 2]); messageData1.CopyTo(data); messageData2.CopyTo(data.Slice(32)); // Aggregate verify using var blsVerify = new BLSHerumi(new BLSParameters()); var verifySuccess = blsVerify.AggregateVerifyData(publicKeys, data, aggregateSignature); Console.WriteLine("Verify: {0}", verifySuccess); verifySuccess.ShouldBeTrue(); }