Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / whidbey / NetFXspW7 / ndp / clr / src / BCL / System / Security / Cryptography / dsa.cs / 1 / dsa.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== // // DSA.cs // namespace System.Security.Cryptography { using System.Text; using System.Runtime.Serialization; using System.Security.Util; using System.Globalization; // DSAParameters is serializable so that one could pass the public parameters // across a remote call, but we explicitly make the private key X non-serializable // so you cannot accidently send it along with the public parameters. [Serializable] [System.Runtime.InteropServices.ComVisible(true)] public struct DSAParameters { public byte[] P; public byte[] Q; public byte[] G; public byte[] Y; public byte[] J; [NonSerialized] public byte[] X; public byte[] Seed; public int Counter; } [System.Runtime.InteropServices.ComVisible(true)] public abstract class DSA : AsymmetricAlgorithm { // // Extending this class allows us to know that you are really implementing // an DSA key. This is required for anybody providing a new DSA key value // implemention. // // The class provides no methods, fields or anything else. Its only purpose is // as a heirarchy member for identification of the algorithm. // protected DSA() { } // // public methods // new static public DSA Create() { return Create("System.Security.Cryptography.DSA"); } new static public DSA Create(String algName) { return (DSA) CryptoConfig.CreateFromName(algName); } abstract public byte[] CreateSignature(byte[] rgbHash); abstract public bool VerifySignature(byte[] rgbHash, byte[] rgbSignature); // We can provide a default implementation of FromXmlString because we require // every DSA implementation to implement ImportParameters // All we have to do here is parse the XML. public override void FromXmlString(String xmlString) { if (xmlString == null) throw new ArgumentNullException("xmlString"); DSAParameters dsaParams = new DSAParameters(); Parser p = new Parser(xmlString); SecurityElement topElement = p.GetTopElement(); // P is always present String pString = topElement.SearchForTextOfLocalName("P"); if (pString == null) { throw new CryptographicException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("Cryptography_InvalidFromXmlString"),"DSA","P")); } dsaParams.P = Convert.FromBase64String(Utils.DiscardWhiteSpaces(pString)); // Q is always present String qString = topElement.SearchForTextOfLocalName("Q"); if (qString == null) { throw new CryptographicException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("Cryptography_InvalidFromXmlString"),"DSA","Q")); } dsaParams.Q = Convert.FromBase64String(Utils.DiscardWhiteSpaces(qString)); // G is always present String gString = topElement.SearchForTextOfLocalName("G"); if (gString == null) { throw new CryptographicException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("Cryptography_InvalidFromXmlString"),"DSA","G")); } dsaParams.G = Convert.FromBase64String(Utils.DiscardWhiteSpaces(gString)); // Y is always present String yString = topElement.SearchForTextOfLocalName("Y"); if (yString == null) { throw new CryptographicException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("Cryptography_InvalidFromXmlString"),"DSA","Y")); } dsaParams.Y = Convert.FromBase64String(Utils.DiscardWhiteSpaces(yString)); // J is optional String jString = topElement.SearchForTextOfLocalName("J"); if (jString != null) dsaParams.J = Convert.FromBase64String(Utils.DiscardWhiteSpaces(jString)); // X is optional -- private key if present String xString = topElement.SearchForTextOfLocalName("X"); if (xString != null) dsaParams.X = Convert.FromBase64String(Utils.DiscardWhiteSpaces(xString)); // Seed and PgenCounter are optional as a unit -- both present or both absent String seedString = topElement.SearchForTextOfLocalName("Seed"); String pgenCounterString = topElement.SearchForTextOfLocalName("PgenCounter"); if ((seedString != null) && (pgenCounterString != null)) { dsaParams.Seed = Convert.FromBase64String(Utils.DiscardWhiteSpaces(seedString)); dsaParams.Counter = Utils.ConvertByteArrayToInt(Convert.FromBase64String(Utils.DiscardWhiteSpaces(pgenCounterString))); } else if ((seedString != null) || (pgenCounterString != null)) { if (seedString == null) { throw new CryptographicException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("Cryptography_InvalidFromXmlString"),"DSA","Seed")); } else { throw new CryptographicException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("Cryptography_InvalidFromXmlString"),"DSA","PgenCounter")); } } ImportParameters(dsaParams); } // We can provide a default implementation of ToXmlString because we require // every DSA implementation to implement ImportParameters // If includePrivateParameters is false, this is just an XMLDSIG DSAKeyValue // clause. If includePrivateParameters is true, then we extend DSAKeyValue with // the other (private) elements. public override String ToXmlString(bool includePrivateParameters) { // From the XMLDSIG spec, RFC 3075, Section 6.4.1, a DSAKeyValue looks like this: /**/ // we extend appropriately for private component X DSAParameters dsaParams = this.ExportParameters(includePrivateParameters); StringBuilder sb = new StringBuilder(); sb.Append(" "); // Add P, Q, G and Y sb.Append(" "); return(sb.ToString()); } abstract public DSAParameters ExportParameters(bool includePrivateParameters); abstract public void ImportParameters(DSAParameters parameters); } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== // // DSA.cs // namespace System.Security.Cryptography { using System.Text; using System.Runtime.Serialization; using System.Security.Util; using System.Globalization; // DSAParameters is serializable so that one could pass the public parameters // across a remote call, but we explicitly make the private key X non-serializable // so you cannot accidently send it along with the public parameters. [Serializable] [System.Runtime.InteropServices.ComVisible(true)] public struct DSAParameters { public byte[] P; public byte[] Q; public byte[] G; public byte[] Y; public byte[] J; [NonSerialized] public byte[] X; public byte[] Seed; public int Counter; } [System.Runtime.InteropServices.ComVisible(true)] public abstract class DSA : AsymmetricAlgorithm { // // Extending this class allows us to know that you are really implementing // an DSA key. This is required for anybody providing a new DSA key value // implemention. // // The class provides no methods, fields or anything else. Its only purpose is // as a heirarchy member for identification of the algorithm. // protected DSA() { } // // public methods // new static public DSA Create() { return Create("System.Security.Cryptography.DSA"); } new static public DSA Create(String algName) { return (DSA) CryptoConfig.CreateFromName(algName); } abstract public byte[] CreateSignature(byte[] rgbHash); abstract public bool VerifySignature(byte[] rgbHash, byte[] rgbSignature); // We can provide a default implementation of FromXmlString because we require // every DSA implementation to implement ImportParameters // All we have to do here is parse the XML. public override void FromXmlString(String xmlString) { if (xmlString == null) throw new ArgumentNullException("xmlString"); DSAParameters dsaParams = new DSAParameters(); Parser p = new Parser(xmlString); SecurityElement topElement = p.GetTopElement(); // P is always present String pString = topElement.SearchForTextOfLocalName("P"); if (pString == null) { throw new CryptographicException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("Cryptography_InvalidFromXmlString"),"DSA","P")); } dsaParams.P = Convert.FromBase64String(Utils.DiscardWhiteSpaces(pString)); // Q is always present String qString = topElement.SearchForTextOfLocalName("Q"); if (qString == null) { throw new CryptographicException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("Cryptography_InvalidFromXmlString"),"DSA","Q")); } dsaParams.Q = Convert.FromBase64String(Utils.DiscardWhiteSpaces(qString)); // G is always present String gString = topElement.SearchForTextOfLocalName("G"); if (gString == null) { throw new CryptographicException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("Cryptography_InvalidFromXmlString"),"DSA","G")); } dsaParams.G = Convert.FromBase64String(Utils.DiscardWhiteSpaces(gString)); // Y is always present String yString = topElement.SearchForTextOfLocalName("Y"); if (yString == null) { throw new CryptographicException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("Cryptography_InvalidFromXmlString"),"DSA","Y")); } dsaParams.Y = Convert.FromBase64String(Utils.DiscardWhiteSpaces(yString)); // J is optional String jString = topElement.SearchForTextOfLocalName("J"); if (jString != null) dsaParams.J = Convert.FromBase64String(Utils.DiscardWhiteSpaces(jString)); // X is optional -- private key if present String xString = topElement.SearchForTextOfLocalName("X"); if (xString != null) dsaParams.X = Convert.FromBase64String(Utils.DiscardWhiteSpaces(xString)); // Seed and PgenCounter are optional as a unit -- both present or both absent String seedString = topElement.SearchForTextOfLocalName("Seed"); String pgenCounterString = topElement.SearchForTextOfLocalName("PgenCounter"); if ((seedString != null) && (pgenCounterString != null)) { dsaParams.Seed = Convert.FromBase64String(Utils.DiscardWhiteSpaces(seedString)); dsaParams.Counter = Utils.ConvertByteArrayToInt(Convert.FromBase64String(Utils.DiscardWhiteSpaces(pgenCounterString))); } else if ((seedString != null) || (pgenCounterString != null)) { if (seedString == null) { throw new CryptographicException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("Cryptography_InvalidFromXmlString"),"DSA","Seed")); } else { throw new CryptographicException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("Cryptography_InvalidFromXmlString"),"DSA","PgenCounter")); } } ImportParameters(dsaParams); } // We can provide a default implementation of ToXmlString because we require // every DSA implementation to implement ImportParameters // If includePrivateParameters is false, this is just an XMLDSIG DSAKeyValue // clause. If includePrivateParameters is true, then we extend DSAKeyValue with // the other (private) elements. public override String ToXmlString(bool includePrivateParameters) { // From the XMLDSIG spec, RFC 3075, Section 6.4.1, a DSAKeyValue looks like this: /*"+Convert.ToBase64String(dsaParams.P)+"
"); sb.Append(""+Convert.ToBase64String(dsaParams.Q)+""); sb.Append(""+Convert.ToBase64String(dsaParams.G)+" "); sb.Append(""+Convert.ToBase64String(dsaParams.Y)+" "); // Add optional components if present if (dsaParams.J != null) { sb.Append(""+Convert.ToBase64String(dsaParams.J)+" "); } if ((dsaParams.Seed != null)) { // note we assume counter is correct if Seed is present sb.Append(""+Convert.ToBase64String(dsaParams.Seed)+" "); sb.Append(""+Convert.ToBase64String(Utils.ConvertIntToByteArray(dsaParams.Counter))+" "); } if (includePrivateParameters) { // Add the private component sb.Append(""+Convert.ToBase64String(dsaParams.X)+" "); } sb.Append("*/ // we extend appropriately for private component X DSAParameters dsaParams = this.ExportParameters(includePrivateParameters); StringBuilder sb = new StringBuilder(); sb.Append(" "); // Add P, Q, G and Y sb.Append(" "); return(sb.ToString()); } abstract public DSAParameters ExportParameters(bool includePrivateParameters); abstract public void ImportParameters(DSAParameters parameters); } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007."+Convert.ToBase64String(dsaParams.P)+"
"); sb.Append(""+Convert.ToBase64String(dsaParams.Q)+""); sb.Append(""+Convert.ToBase64String(dsaParams.G)+" "); sb.Append(""+Convert.ToBase64String(dsaParams.Y)+" "); // Add optional components if present if (dsaParams.J != null) { sb.Append(""+Convert.ToBase64String(dsaParams.J)+" "); } if ((dsaParams.Seed != null)) { // note we assume counter is correct if Seed is present sb.Append(""+Convert.ToBase64String(dsaParams.Seed)+" "); sb.Append(""+Convert.ToBase64String(Utils.ConvertIntToByteArray(dsaParams.Counter))+" "); } if (includePrivateParameters) { // Add the private component sb.Append(""+Convert.ToBase64String(dsaParams.X)+" "); } sb.Append("
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- Separator.cs
- DataControlButton.cs
- DeadCharTextComposition.cs
- GeometryModel3D.cs
- _SSPISessionCache.cs
- ImageListStreamer.cs
- InstalledFontCollection.cs
- ActiveXHost.cs
- AttachedPropertyBrowsableWhenAttributePresentAttribute.cs
- GlobalProxySelection.cs
- ExtensionSimplifierMarkupObject.cs
- Size3DConverter.cs
- WorkflowInlining.cs
- FileDialog_Vista.cs
- HttpProfileGroupBase.cs
- TitleStyle.cs
- SqlRecordBuffer.cs
- CompiledXpathExpr.cs
- Vector3D.cs
- FixedStringLookup.cs
- CopyOfAction.cs
- SoapBinding.cs
- ResourceExpressionBuilder.cs
- CommonRemoteMemoryBlock.cs
- documentsequencetextcontainer.cs
- SystemException.cs
- SignedPkcs7.cs
- AsyncOperationManager.cs
- RadioButton.cs
- TableHeaderCell.cs
- CommonObjectSecurity.cs
- OleDbFactory.cs
- PixelFormat.cs
- PermissionRequestEvidence.cs
- LineGeometry.cs
- ParallelTimeline.cs
- Utilities.cs
- CellLabel.cs
- StreamFormatter.cs
- DataGridRowAutomationPeer.cs
- ListViewInsertionMark.cs
- ResourceReader.cs
- ScrollItemProviderWrapper.cs
- _CookieModule.cs
- CalculatedColumn.cs
- HtmlSelect.cs
- ToolStripProgressBar.cs
- ExpressionCopier.cs
- URIFormatException.cs
- WebPartDescription.cs
- Encoding.cs
- PerspectiveCamera.cs
- SemaphoreSecurity.cs
- IisTraceWebEventProvider.cs
- BindingManagerDataErrorEventArgs.cs
- CalendarButton.cs
- ImportOptions.cs
- ControlCommandSet.cs
- Visitor.cs
- RectIndependentAnimationStorage.cs
- ConditionalWeakTable.cs
- Vector3D.cs
- BrowserCapabilitiesCompiler.cs
- CodeSubDirectoriesCollection.cs
- EasingQuaternionKeyFrame.cs
- COM2ExtendedBrowsingHandler.cs
- DataRowExtensions.cs
- ProtocolsConfigurationHandler.cs
- SHA256Managed.cs
- SortDescriptionCollection.cs
- DataControlPagerLinkButton.cs
- Switch.cs
- SqlDesignerDataSourceView.cs
- DataControlField.cs
- DbExpressionRules.cs
- NotCondition.cs
- Matrix.cs
- RoutingTable.cs
- MemoryMappedView.cs
- AssemblyHelper.cs
- File.cs
- FixedSOMFixedBlock.cs
- TextHidden.cs
- OracleRowUpdatingEventArgs.cs
- WindowsProgressbar.cs
- RecipientServiceModelSecurityTokenRequirement.cs
- LocalizabilityAttribute.cs
- WSDualHttpBinding.cs
- PieceNameHelper.cs
- ClientSettingsStore.cs
- Package.cs
- DataBoundLiteralControl.cs
- SplitterCancelEvent.cs
- figurelengthconverter.cs
- ScrollEvent.cs
- NamespaceMapping.cs
- _TransmitFileOverlappedAsyncResult.cs
- Memoizer.cs
- DataGridViewColumnConverter.cs
- AttributeCollection.cs