Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / clr / src / BCL / System / Security / Policy / HashMembershipCondition.cs / 2 / 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.Threading; using System.Globalization; [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"); m_value = new byte[value.Length]; Array.Copy(value, m_value, value.Length); m_hashAlg = hashAlg; } ///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"); m_hashAlg = value; } get { if (m_hashAlg == null && m_element != null) ParseHashAlgorithm(); return m_hashAlg; } } public byte[] HashValue { set { if (value == null) throw new ArgumentNullException("value"); 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; IEnumerator enumerator = evidence.GetHostEnumerator(); while (enumerator.MoveNext()) { Hash hash = enumerator.Current as Hash; 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; } 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); } public SecurityElement ToXml() { return ToXml(null); } public void FromXml(SecurityElement e) { FromXml(e, null); } 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. BCLDebug.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")); lock (InternalSyncObject) { m_element = e; m_value = null; m_hashAlg = null; } } 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; } 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; } public override string ToString() { if (m_hashAlg == null) ParseHashAlgorithm(); return String.Format(CultureInfo.CurrentCulture, 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(String.Format(CultureInfo.CurrentCulture, 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.Threading; using System.Globalization; [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"); m_value = new byte[value.Length]; Array.Copy(value, m_value, value.Length); m_hashAlg = hashAlg; } /// 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"); m_hashAlg = value; } get { if (m_hashAlg == null && m_element != null) ParseHashAlgorithm(); return m_hashAlg; } } public byte[] HashValue { set { if (value == null) throw new ArgumentNullException("value"); 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; IEnumerator enumerator = evidence.GetHostEnumerator(); while (enumerator.MoveNext()) { Hash hash = enumerator.Current as Hash; 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; } 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); } public SecurityElement ToXml() { return ToXml(null); } public void FromXml(SecurityElement e) { FromXml(e, null); } 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. BCLDebug.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")); lock (InternalSyncObject) { m_element = e; m_value = null; m_hashAlg = null; } } 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; } 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; } public override string ToString() { if (m_hashAlg == null) ParseHashAlgorithm(); return String.Format(CultureInfo.CurrentCulture, 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(String.Format(CultureInfo.CurrentCulture, 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
- XPathNavigator.cs
- EmissiveMaterial.cs
- IndexedString.cs
- DataGridViewCellCollection.cs
- RepeaterItemEventArgs.cs
- GridViewColumnCollectionChangedEventArgs.cs
- SqlDataSourceCommandEventArgs.cs
- Convert.cs
- SqlPersonalizationProvider.cs
- DocumentSignatureManager.cs
- ToggleButton.cs
- XmlSchemaExternal.cs
- QuadraticBezierSegment.cs
- UnaryQueryOperator.cs
- _SslStream.cs
- TextContainerHelper.cs
- KeyConverter.cs
- EnterpriseServicesHelper.cs
- FailedToStartupUIException.cs
- ChannelCredentials.cs
- AdditionalEntityFunctions.cs
- SafeProcessHandle.cs
- XmlText.cs
- SafeEventLogWriteHandle.cs
- Region.cs
- TrackingExtract.cs
- CompiledIdentityConstraint.cs
- UriSection.cs
- XmlSchemaType.cs
- FormsAuthenticationCredentials.cs
- OdbcCommand.cs
- ClipboardProcessor.cs
- ReplacementText.cs
- ToolboxItemWrapper.cs
- DecimalAverageAggregationOperator.cs
- DSASignatureFormatter.cs
- TileModeValidation.cs
- InternalException.cs
- BooleanToSelectiveScrollingOrientationConverter.cs
- BamlLocalizableResource.cs
- UserPreferenceChangedEventArgs.cs
- AuthenticateEventArgs.cs
- TemplateControlParser.cs
- Popup.cs
- XmlComment.cs
- DPAPIProtectedConfigurationProvider.cs
- BooleanConverter.cs
- UrlMapping.cs
- SQLConvert.cs
- AgileSafeNativeMemoryHandle.cs
- basenumberconverter.cs
- ItemChangedEventArgs.cs
- DetailsViewInsertEventArgs.cs
- StructuredCompositeActivityDesigner.cs
- XslException.cs
- SchemaConstraints.cs
- RequestNavigateEventArgs.cs
- BufferBuilder.cs
- XamlSerializer.cs
- glyphs.cs
- SqlDataReaderSmi.cs
- ClusterSafeNativeMethods.cs
- RuleCache.cs
- ListInitExpression.cs
- EdmProviderManifest.cs
- VersionPair.cs
- RuleSet.cs
- XmlSchemaObjectTable.cs
- CommandEventArgs.cs
- StrokeNodeEnumerator.cs
- TableLayoutSettings.cs
- MethodBuilderInstantiation.cs
- Marshal.cs
- IteratorFilter.cs
- RectangleConverter.cs
- Vector3DAnimation.cs
- SqlTrackingService.cs
- ToolStripContainer.cs
- AppDomain.cs
- UpdatePanelTrigger.cs
- DataServices.cs
- SharedPersonalizationStateInfo.cs
- TemplatedWizardStep.cs
- DataSetUtil.cs
- Journaling.cs
- MemberAssignmentAnalysis.cs
- KeyInstance.cs
- XmlKeywords.cs
- activationcontext.cs
- SemanticResolver.cs
- ObjectDisposedException.cs
- SqlDependencyListener.cs
- SqlUserDefinedAggregateAttribute.cs
- ApplicationManager.cs
- CachedPathData.cs
- InstancePersistenceContext.cs
- PageCache.cs
- CollectionViewSource.cs
- FilteredReadOnlyMetadataCollection.cs
- SocketElement.cs