Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / BCL / System / Security / Policy / HashMembershipCondition.cs / 1305376 / HashMembershipCondition.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== //[....] // // // HashMembershipCondition.cs // // Implementation of membership condition for hashes of assemblies. // namespace System.Security.Policy { using System.Collections; using System.Runtime.Serialization; using System.Security; using System.Security.Cryptography; using System.Security.Util; using System.Security.Permissions; using System.Threading; using System.Globalization; using System.Diagnostics.Contracts; [Serializable] [System.Runtime.InteropServices.ComVisible(true)] public sealed class HashMembershipCondition : ISerializable, IDeserializationCallback, IMembershipCondition, IReportMatchMembershipCondition { private byte[] m_value = null; private HashAlgorithm m_hashAlg = null; private SecurityElement m_element = null; private object s_InternalSyncObject = null; private object InternalSyncObject { get { if (s_InternalSyncObject == null) { Object o = new Object(); Interlocked.CompareExchange(ref s_InternalSyncObject, o, null); } return s_InternalSyncObject; } } internal HashMembershipCondition() {} private HashMembershipCondition (SerializationInfo info, StreamingContext context) { m_value = (byte[]) info.GetValue("HashValue", typeof(byte[])); string hashAlgorithm = (string) info.GetValue("HashAlgorithm", typeof(string)); if (hashAlgorithm != null) m_hashAlg = HashAlgorithm.Create(hashAlgorithm); else m_hashAlg = new SHA1Managed(); } public HashMembershipCondition(HashAlgorithm hashAlg, byte[] value) { if (value == null) throw new ArgumentNullException("value"); if (hashAlg == null) throw new ArgumentNullException("hashAlg"); Contract.EndContractBlock(); m_value = new byte[value.Length]; Array.Copy(value, m_value, value.Length); m_hashAlg = hashAlg; } ///[System.Security.SecurityCritical] void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context) { info.AddValue("HashValue", this.HashValue); info.AddValue("HashAlgorithm", this.HashAlgorithm.ToString()); } /// void IDeserializationCallback.OnDeserialization (Object sender) {} public HashAlgorithm HashAlgorithm { set { if (value == null) throw new ArgumentNullException("HashAlgorithm"); Contract.EndContractBlock(); m_hashAlg = value; } [System.Security.SecuritySafeCritical] // auto-generated get { if (m_hashAlg == null && m_element != null) ParseHashAlgorithm(); return m_hashAlg; } } public byte[] HashValue { set { if (value == null) throw new ArgumentNullException("value"); Contract.EndContractBlock(); m_value = new byte[value.Length]; Array.Copy(value, m_value, value.Length); } get { if (m_value == null && m_element != null) ParseHashValue(); if (m_value == null) return null; byte[] value = new byte[m_value.Length]; Array.Copy(m_value, value, m_value.Length); return value; } } public bool Check(Evidence evidence) { object usedEvidence = null; return (this as IReportMatchMembershipCondition).Check(evidence, out usedEvidence); } bool IReportMatchMembershipCondition.Check(Evidence evidence, out object usedEvidence) { usedEvidence = null; if (evidence == null) return false; Hash hash = evidence.GetHostEvidence (); if (hash != null) { if (m_value == null && m_element != null) ParseHashValue(); if (m_hashAlg == null && m_element != null) ParseHashAlgorithm(); byte[] asmHash = null; lock (InternalSyncObject) { asmHash = hash.GenerateHash(m_hashAlg); } if (asmHash != null && CompareArrays(asmHash, m_value)) { usedEvidence = hash; return true; } } return false; } [System.Security.SecuritySafeCritical] // auto-generated public IMembershipCondition Copy() { if (m_value == null && m_element != null) ParseHashValue(); if (m_hashAlg == null && m_element != null) ParseHashAlgorithm(); return new HashMembershipCondition(m_hashAlg, m_value); } [System.Security.SecuritySafeCritical] // auto-generated public SecurityElement ToXml() { return ToXml(null); } public void FromXml(SecurityElement e) { FromXml(e, null); } [System.Security.SecuritySafeCritical] // auto-generated public SecurityElement ToXml(PolicyLevel level) { if (m_value == null && m_element != null) ParseHashValue(); if (m_hashAlg == null && m_element != null) ParseHashAlgorithm(); SecurityElement root = new SecurityElement("IMembershipCondition"); XMLUtil.AddClassAttribute(root, this.GetType(), "System.Security.Policy.HashMembershipCondition"); // If you hit this assert then most likely you are trying to change the name of this class. // This is ok as long as you change the hard coded string above and change the assert below. Contract.Assert(this.GetType().FullName.Equals("System.Security.Policy.HashMembershipCondition"), "Class name changed!"); root.AddAttribute("version", "1"); if (m_value != null) root.AddAttribute(s_tagHashValue, Hex.EncodeHexString(HashValue)); if (m_hashAlg != null) root.AddAttribute(s_tagHashAlgorithm, HashAlgorithm.GetType().FullName); return root; } public void FromXml(SecurityElement e, PolicyLevel level) { if (e == null) throw new ArgumentNullException("e"); if (!e.Tag.Equals("IMembershipCondition")) throw new ArgumentException(Environment.GetResourceString("Argument_MembershipConditionElement")); Contract.EndContractBlock(); lock (InternalSyncObject) { m_element = e; m_value = null; m_hashAlg = null; } } [System.Security.SecuritySafeCritical] // auto-generated public override bool Equals(Object o) { HashMembershipCondition that = (o as HashMembershipCondition); if (that != null) { if (this.m_hashAlg == null && this.m_element != null) this.ParseHashAlgorithm(); if (that.m_hashAlg == null && that.m_element != null) that.ParseHashAlgorithm(); if (this.m_hashAlg != null && that.m_hashAlg != null && this.m_hashAlg.GetType() == that.m_hashAlg.GetType()) { if (this.m_value == null && this.m_element != null) this.ParseHashValue(); if (that.m_value == null && that.m_element != null) that.ParseHashValue(); if (this.m_value.Length != that.m_value.Length) return false; for (int i = 0; i < m_value.Length; i++) { if (this.m_value[i] != that.m_value[i]) return false; } return true; } } return false; } [System.Security.SecuritySafeCritical] // auto-generated public override int GetHashCode() { if (this.m_hashAlg == null && this.m_element != null) this.ParseHashAlgorithm(); int accumulator = this.m_hashAlg != null ? this.m_hashAlg.GetType().GetHashCode() : 0; if (this.m_value == null && this.m_element != null) this.ParseHashValue(); accumulator = accumulator ^ GetByteArrayHashCode(this.m_value); return accumulator; } [System.Security.SecuritySafeCritical] // auto-generated public override string ToString() { if (m_hashAlg == null) ParseHashAlgorithm(); return Environment.GetResourceString("Hash_ToString", m_hashAlg.GetType().AssemblyQualifiedName, Hex.EncodeHexString(HashValue)); } private const string s_tagHashValue = "HashValue"; private const string s_tagHashAlgorithm = "HashAlgorithm"; private void ParseHashValue() { lock (InternalSyncObject) { if (m_element == null) return; string elHash = m_element.Attribute(s_tagHashValue); if (elHash != null) m_value = Hex.DecodeHexString(elHash); else throw new ArgumentException(Environment.GetResourceString("Argument_InvalidXMLElement", s_tagHashValue, this.GetType().FullName)); if (m_value != null && m_hashAlg != null) { m_element = null; } } } private void ParseHashAlgorithm() { lock (InternalSyncObject) { if (m_element == null) return; string elHashAlg = m_element.Attribute(s_tagHashAlgorithm); if (elHashAlg != null) m_hashAlg = HashAlgorithm.Create(elHashAlg); else m_hashAlg = new SHA1Managed(); if (m_value != null && m_hashAlg != null) m_element = null; } } private static bool CompareArrays(byte[] first, byte[] second) { if (first.Length != second.Length) return false; int count = first.Length; for (int i = 0; i < count; ++i) { if (first[i] != second[i]) return false; } return true; } private static int GetByteArrayHashCode(byte[] baData) { if (baData == null) return 0; int accumulator = 0; for (int i = 0; i < baData.Length; ++i) { accumulator = (accumulator << 8) ^ (int)baData[i] ^ (accumulator >> 24); } return accumulator; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== // [....] // // // HashMembershipCondition.cs // // Implementation of membership condition for hashes of assemblies. // namespace System.Security.Policy { using System.Collections; using System.Runtime.Serialization; using System.Security; using System.Security.Cryptography; using System.Security.Util; using System.Security.Permissions; using System.Threading; using System.Globalization; using System.Diagnostics.Contracts; [Serializable] [System.Runtime.InteropServices.ComVisible(true)] public sealed class HashMembershipCondition : ISerializable, IDeserializationCallback, IMembershipCondition, IReportMatchMembershipCondition { private byte[] m_value = null; private HashAlgorithm m_hashAlg = null; private SecurityElement m_element = null; private object s_InternalSyncObject = null; private object InternalSyncObject { get { if (s_InternalSyncObject == null) { Object o = new Object(); Interlocked.CompareExchange(ref s_InternalSyncObject, o, null); } return s_InternalSyncObject; } } internal HashMembershipCondition() {} private HashMembershipCondition (SerializationInfo info, StreamingContext context) { m_value = (byte[]) info.GetValue("HashValue", typeof(byte[])); string hashAlgorithm = (string) info.GetValue("HashAlgorithm", typeof(string)); if (hashAlgorithm != null) m_hashAlg = HashAlgorithm.Create(hashAlgorithm); else m_hashAlg = new SHA1Managed(); } public HashMembershipCondition(HashAlgorithm hashAlg, byte[] value) { if (value == null) throw new ArgumentNullException("value"); if (hashAlg == null) throw new ArgumentNullException("hashAlg"); Contract.EndContractBlock(); m_value = new byte[value.Length]; Array.Copy(value, m_value, value.Length); m_hashAlg = hashAlg; } ///[System.Security.SecurityCritical] void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context) { info.AddValue("HashValue", this.HashValue); info.AddValue("HashAlgorithm", this.HashAlgorithm.ToString()); } /// void IDeserializationCallback.OnDeserialization (Object sender) {} public HashAlgorithm HashAlgorithm { set { if (value == null) throw new ArgumentNullException("HashAlgorithm"); Contract.EndContractBlock(); m_hashAlg = value; } [System.Security.SecuritySafeCritical] // auto-generated get { if (m_hashAlg == null && m_element != null) ParseHashAlgorithm(); return m_hashAlg; } } public byte[] HashValue { set { if (value == null) throw new ArgumentNullException("value"); Contract.EndContractBlock(); m_value = new byte[value.Length]; Array.Copy(value, m_value, value.Length); } get { if (m_value == null && m_element != null) ParseHashValue(); if (m_value == null) return null; byte[] value = new byte[m_value.Length]; Array.Copy(m_value, value, m_value.Length); return value; } } public bool Check(Evidence evidence) { object usedEvidence = null; return (this as IReportMatchMembershipCondition).Check(evidence, out usedEvidence); } bool IReportMatchMembershipCondition.Check(Evidence evidence, out object usedEvidence) { usedEvidence = null; if (evidence == null) return false; Hash hash = evidence.GetHostEvidence (); if (hash != null) { if (m_value == null && m_element != null) ParseHashValue(); if (m_hashAlg == null && m_element != null) ParseHashAlgorithm(); byte[] asmHash = null; lock (InternalSyncObject) { asmHash = hash.GenerateHash(m_hashAlg); } if (asmHash != null && CompareArrays(asmHash, m_value)) { usedEvidence = hash; return true; } } return false; } [System.Security.SecuritySafeCritical] // auto-generated public IMembershipCondition Copy() { if (m_value == null && m_element != null) ParseHashValue(); if (m_hashAlg == null && m_element != null) ParseHashAlgorithm(); return new HashMembershipCondition(m_hashAlg, m_value); } [System.Security.SecuritySafeCritical] // auto-generated public SecurityElement ToXml() { return ToXml(null); } public void FromXml(SecurityElement e) { FromXml(e, null); } [System.Security.SecuritySafeCritical] // auto-generated public SecurityElement ToXml(PolicyLevel level) { if (m_value == null && m_element != null) ParseHashValue(); if (m_hashAlg == null && m_element != null) ParseHashAlgorithm(); SecurityElement root = new SecurityElement("IMembershipCondition"); XMLUtil.AddClassAttribute(root, this.GetType(), "System.Security.Policy.HashMembershipCondition"); // If you hit this assert then most likely you are trying to change the name of this class. // This is ok as long as you change the hard coded string above and change the assert below. Contract.Assert(this.GetType().FullName.Equals("System.Security.Policy.HashMembershipCondition"), "Class name changed!"); root.AddAttribute("version", "1"); if (m_value != null) root.AddAttribute(s_tagHashValue, Hex.EncodeHexString(HashValue)); if (m_hashAlg != null) root.AddAttribute(s_tagHashAlgorithm, HashAlgorithm.GetType().FullName); return root; } public void FromXml(SecurityElement e, PolicyLevel level) { if (e == null) throw new ArgumentNullException("e"); if (!e.Tag.Equals("IMembershipCondition")) throw new ArgumentException(Environment.GetResourceString("Argument_MembershipConditionElement")); Contract.EndContractBlock(); lock (InternalSyncObject) { m_element = e; m_value = null; m_hashAlg = null; } } [System.Security.SecuritySafeCritical] // auto-generated public override bool Equals(Object o) { HashMembershipCondition that = (o as HashMembershipCondition); if (that != null) { if (this.m_hashAlg == null && this.m_element != null) this.ParseHashAlgorithm(); if (that.m_hashAlg == null && that.m_element != null) that.ParseHashAlgorithm(); if (this.m_hashAlg != null && that.m_hashAlg != null && this.m_hashAlg.GetType() == that.m_hashAlg.GetType()) { if (this.m_value == null && this.m_element != null) this.ParseHashValue(); if (that.m_value == null && that.m_element != null) that.ParseHashValue(); if (this.m_value.Length != that.m_value.Length) return false; for (int i = 0; i < m_value.Length; i++) { if (this.m_value[i] != that.m_value[i]) return false; } return true; } } return false; } [System.Security.SecuritySafeCritical] // auto-generated public override int GetHashCode() { if (this.m_hashAlg == null && this.m_element != null) this.ParseHashAlgorithm(); int accumulator = this.m_hashAlg != null ? this.m_hashAlg.GetType().GetHashCode() : 0; if (this.m_value == null && this.m_element != null) this.ParseHashValue(); accumulator = accumulator ^ GetByteArrayHashCode(this.m_value); return accumulator; } [System.Security.SecuritySafeCritical] // auto-generated public override string ToString() { if (m_hashAlg == null) ParseHashAlgorithm(); return Environment.GetResourceString("Hash_ToString", m_hashAlg.GetType().AssemblyQualifiedName, Hex.EncodeHexString(HashValue)); } private const string s_tagHashValue = "HashValue"; private const string s_tagHashAlgorithm = "HashAlgorithm"; private void ParseHashValue() { lock (InternalSyncObject) { if (m_element == null) return; string elHash = m_element.Attribute(s_tagHashValue); if (elHash != null) m_value = Hex.DecodeHexString(elHash); else throw new ArgumentException(Environment.GetResourceString("Argument_InvalidXMLElement", s_tagHashValue, this.GetType().FullName)); if (m_value != null && m_hashAlg != null) { m_element = null; } } } private void ParseHashAlgorithm() { lock (InternalSyncObject) { if (m_element == null) return; string elHashAlg = m_element.Attribute(s_tagHashAlgorithm); if (elHashAlg != null) m_hashAlg = HashAlgorithm.Create(elHashAlg); else m_hashAlg = new SHA1Managed(); if (m_value != null && m_hashAlg != null) m_element = null; } } private static bool CompareArrays(byte[] first, byte[] second) { if (first.Length != second.Length) return false; int count = first.Length; for (int i = 0; i < count; ++i) { if (first[i] != second[i]) return false; } return true; } private static int GetByteArrayHashCode(byte[] baData) { if (baData == null) return 0; int accumulator = 0; for (int i = 0; i < baData.Length; ++i) { accumulator = (accumulator << 8) ^ (int)baData[i] ^ (accumulator >> 24); } return accumulator; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- GeneralTransform3DGroup.cs
- KeyNameIdentifierClause.cs
- GlobalAllocSafeHandle.cs
- SoapExtensionImporter.cs
- URLString.cs
- SqlGatherProducedAliases.cs
- CryptoHelper.cs
- ClaimTypeRequirement.cs
- NonVisualControlAttribute.cs
- IPipelineRuntime.cs
- HtmlHead.cs
- FormCollection.cs
- VoiceChangeEventArgs.cs
- LocationInfo.cs
- TcpChannelHelper.cs
- milrender.cs
- ConcurrentBag.cs
- StreamReader.cs
- InvalidPrinterException.cs
- TraversalRequest.cs
- DataExpression.cs
- CodeDirectoryCompiler.cs
- CodeDirectionExpression.cs
- StatusBarPanel.cs
- NodeInfo.cs
- CornerRadius.cs
- MediaScriptCommandRoutedEventArgs.cs
- BooleanFacetDescriptionElement.cs
- HttpRequestCacheValidator.cs
- Connector.cs
- MarkupCompilePass1.cs
- ClientTargetCollection.cs
- ActiveDocumentEvent.cs
- BitmapScalingModeValidation.cs
- ServiceDescriptions.cs
- DataGridViewCheckBoxColumn.cs
- ListArgumentProvider.cs
- EntitySetBase.cs
- SmtpDigestAuthenticationModule.cs
- Funcletizer.cs
- BulletedListEventArgs.cs
- CompositeDataBoundControl.cs
- CqlErrorHelper.cs
- ContextMarshalException.cs
- InternalPermissions.cs
- Clipboard.cs
- QuaternionRotation3D.cs
- Bits.cs
- PersonalizationEntry.cs
- AssemblyInfo.cs
- CreateUserErrorEventArgs.cs
- ExpandCollapsePattern.cs
- ArrayConverter.cs
- EnumMember.cs
- DynamicValidator.cs
- ImportCatalogPart.cs
- RSAProtectedConfigurationProvider.cs
- RelationshipEndMember.cs
- ListBoxDesigner.cs
- X509Utils.cs
- IndexingContentUnit.cs
- Executor.cs
- MarshalByRefObject.cs
- CodeDefaultValueExpression.cs
- ResourceDictionary.cs
- Facet.cs
- ColorMap.cs
- ResourcePermissionBase.cs
- UnknownBitmapEncoder.cs
- ColumnMapVisitor.cs
- ClickablePoint.cs
- PictureBoxDesigner.cs
- FontSizeConverter.cs
- TextBoxLine.cs
- Facet.cs
- NegotiateStream.cs
- PropertyChangedEventManager.cs
- FaultBookmark.cs
- Literal.cs
- OrderingQueryOperator.cs
- Encoder.cs
- CodeChecksumPragma.cs
- ObjectStateEntry.cs
- WebBrowser.cs
- COM2EnumConverter.cs
- BindingGroup.cs
- OleDbPropertySetGuid.cs
- CodeExpressionStatement.cs
- RenderDataDrawingContext.cs
- StoryFragments.cs
- Rotation3DAnimation.cs
- Vector.cs
- ReferenceTypeElement.cs
- DataGridViewColumnConverter.cs
- SendKeys.cs
- PasswordBoxAutomationPeer.cs
- CacheHelper.cs
- AuthenticationService.cs
- MetadataArtifactLoader.cs
- UrlPropertyAttribute.cs