Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / BCL / System / Security / Policy / AppDomainEvidenceFactory.cs / 1305376 / AppDomainEvidenceFactory.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== using System; using System.Collections.Generic; using System.Diagnostics.Contracts; using System.Reflection; namespace System.Security.Policy { ////// Factory class which creates evidence on demand for an AppDomain /// internal sealed class AppDomainEvidenceFactory : IRuntimeEvidenceFactory { private AppDomain m_targetDomain; private Evidence m_entryPointEvidence; internal AppDomainEvidenceFactory(AppDomain target) { Contract.Assert(target != null); Contract.Assert(target == AppDomain.CurrentDomain, "AppDomainEvidenceFactory should not be used across domains."); m_targetDomain = target; } ////// AppDomain this factory generates evidence for /// public IEvidenceFactory Target { get { return m_targetDomain; } } ////// Return any evidence supplied by the AppDomain itself /// public IEnumerableGetFactorySuppliedEvidence() { // AppDomains do not contain serialized evidence return new EvidenceBase[] { }; } /// /// Generate evidence on demand for an AppDomain /// [SecuritySafeCritical] public EvidenceBase GenerateEvidence(Type evidenceType) { // For v1.x compatibility, the default AppDomain has the same evidence as the entry point // assembly. Since other AppDomains inherit their evidence from the default AppDomain by // default, they also use the entry point assembly. BCLDebug.Assert(m_targetDomain == AppDomain.CurrentDomain, "AppDomainEvidenceFactory should not be used across domains."); if (m_targetDomain.IsDefaultAppDomain()) { // If we don't already know the evidence for the entry point assembly, get that now. If we // have a RuntimeAssembly go directly to its EvidenceNoDemand property to avoid the full // demand that it will do on access to its Evidence property. if (m_entryPointEvidence == null) { Assembly entryAssembly = Assembly.GetEntryAssembly(); RuntimeAssembly entryRuntimeAssembly = entryAssembly as RuntimeAssembly; if (entryRuntimeAssembly != null) { m_entryPointEvidence = entryRuntimeAssembly.EvidenceNoDemand.Clone(); } else if (entryAssembly != null) { m_entryPointEvidence = entryAssembly.Evidence; } } // If the entry point assembly provided evidence, then we use that for the AppDomain if (m_entryPointEvidence != null) { return m_entryPointEvidence.GetHostEvidence(evidenceType); } } else { // If we're not the default domain, then we should inherit our evidence from the default // domain -- so ask it what evidence it has of this type. AppDomain defaultDomain = AppDomain.GetDefaultDomain(); return defaultDomain.GetHostEvidence(evidenceType); } // AppDomains do not generate any evidence on demand return null; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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