public static ComputeHash ( ArraySegment |
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value | ArraySegment |
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return | byte[] |
public int Verify_1(byte[] key, byte[] value) { if (key == null) { throw new ArgumentNullException("key"); } if (key.Length != 32) { throw new ArgumentOutOfRangeException("key"); } if (value == null) { throw new ArgumentNullException("value"); } if (value.Length != 32) { throw new ArgumentOutOfRangeException("value"); } var bufferManager = BufferManager.Instance; try { byte[] result; { byte[] buffer = bufferManager.TakeBuffer(64); Unsafe.Copy(key, 0, buffer, 0, 32); Unsafe.Copy(value, 0, buffer, 32, 32); result = Sha256.ComputeHash(buffer, 0, 64); bufferManager.ReturnBuffer(buffer); } int count = 0; for (int i = 0; i < 32; i++) { for (int j = 0; j < 8; j++) { if (((result[i] << j) & 0x80) == 0) { count++; } else { goto End; } } } End: return(count); } catch (Exception) { return(0); } }
public Cash Create(Stream stream) { if (stream == null) { throw new ArgumentNullException("stream"); } if (this == null || this.Limit == 0 || this.ComputationTime <= TimeSpan.Zero) { return(null); } if (this.CashAlgorithm == CashAlgorithm.Version1) { _isCanceled = false; var minerUtilities = new MinerUtilities(); try { var task = Task.Factory.StartNew(() => { var key = minerUtilities.Create_1(Sha256.ComputeHash(stream), this.Limit, this.ComputationTime); return(new Cash(CashAlgorithm.Version1, key)); }); while (!task.IsCompleted) { if (_isCanceled) { minerUtilities.Cancel(); } Thread.Sleep(1000); } return(task.Result); } catch (AggregateException e) { throw e.InnerExceptions.FirstOrDefault(); } } return(null); }
public static int Verify(Cash cash, Stream stream) { if (stream == null) { throw new ArgumentNullException("stream"); } if (cash == null) { return(0); } if (cash.CashAlgorithm == CashAlgorithm.Version1) { var minerUtilities = new MinerUtilities(); return(minerUtilities.Verify_1(cash.Key, Sha256.ComputeHash(stream))); } return(0); }
public static string GetSignature(Certificate certificate) { if (certificate == null || certificate.Nickname == null || certificate.PublicKey == null) { return(null); } try { if (certificate.DigitalSignatureAlgorithm == DigitalSignatureAlgorithm.EcDsaP521_Sha256 || certificate.DigitalSignatureAlgorithm == DigitalSignatureAlgorithm.Rsa2048_Sha256) { using (BufferStream bufferStream = new BufferStream(_bufferManager)) { Signature.WriteString(bufferStream, certificate.Nickname); bufferStream.Write(certificate.PublicKey, 0, certificate.PublicKey.Length); bufferStream.Seek(0, SeekOrigin.Begin); var signature = certificate.Nickname + "@" + NetworkConverter.ToBase64UrlString(Sha256.ComputeHash(bufferStream)); return(_signatureCache.GetValue(signature, certificate)); } } return(null); } catch (Exception) { return(null); } }