ApplicationTrust.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / BCL / System / Security / Policy / ApplicationTrust.cs / 1305376 / ApplicationTrust.cs

                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
// [....]
// 
 
//
// ApplicationTrust.cs 
//
// This class encapsulates security decisions about an application.
//
 
namespace System.Security.Policy {
    using System.Collections; 
    using System.Collections.Generic; 
#if FEATURE_CLICKONCE
    using System.Deployment.Internal.Isolation; 
    using System.Deployment.Internal.Isolation.Manifest;
#endif
    using System.Globalization;
    using System.IO; 
    using System.Runtime.InteropServices;
#if FEATURE_SERIALIZATION 
    using System.Runtime.Serialization; 
    using System.Runtime.Serialization.Formatters.Binary;
#endif // FEATURE_SERIALIZATION 
    using System.Runtime.Versioning;
    using System.Security.Permissions;
    using System.Security.Util;
    using System.Text; 
    using System.Threading;
    using System.Diagnostics.Contracts; 
 
    [System.Runtime.InteropServices.ComVisible(true)]
    public enum ApplicationVersionMatch { 
        MatchExactVersion,
        MatchAllVersions
    }
 
    [System.Runtime.InteropServices.ComVisible(true)]
    [Serializable] 
    public sealed class ApplicationTrust : EvidenceBase, ISecurityEncodable 
    {
#if FEATURE_CLICKONCE 
        private ApplicationIdentity m_appId;
        private bool m_appTrustedToRun;
        private bool m_persist;
 
        private object m_extraInfo;
        private SecurityElement m_elExtraInfo; 
#endif 
        private PolicyStatement m_psDefaultGrant;
        private IList m_fullTrustAssemblies; 

        // Permission special flags for the default grant set in this ApplicationTrust.  This should be
        // updated in [....] with any updates to the default grant set.
        // 
        // In the general case, these values cannot be trusted - we only store a reference to the
        // DefaultGrantSet, and return the reference directly, which means that code can update the 
        // permission set without our knowledge.  That would lead to the flags getting out of [....] with the 
        // grant set.
        // 
        // However, we only care about these flags when we're creating a homogenous AppDomain, and in that
        // case we control the ApplicationTrust object end-to-end, and know that the permission set will not
        // change after the flags are calculated.
        [NonSerialized] 
        private int m_grantSetSpecialFlags;
 
#if FEATURE_CLICKONCE 
        public ApplicationTrust (ApplicationIdentity applicationIdentity) : this () {
            ApplicationIdentity = applicationIdentity; 
        }
#endif
        public ApplicationTrust () : this (new PermissionSet(PermissionState.None))
        { 
        }
 
        internal ApplicationTrust (PermissionSet defaultGrantSet) 
            : this (defaultGrantSet, new StrongName[] { })
        { 
        }

        public ApplicationTrust(PermissionSet defaultGrantSet, IEnumerable fullTrustAssemblies) {
            if (defaultGrantSet == null) { 
                throw new ArgumentNullException("defaultGrantSet");
            } 
            if (fullTrustAssemblies == null) { 
                throw new ArgumentNullException("fullTrustAssemblies");
            } 

            // Creating a PolicyStatement copies the incoming permission set, so we don't have to worry
            // about the PermissionSet parameter changing underneath us after we've calculated the
            // permisison flags in the DefaultGrantSet setter. 
            DefaultGrantSet = new PolicyStatement(defaultGrantSet);
 
            List fullTrustList = new List(); 
            foreach (StrongName strongName in fullTrustAssemblies) {
                if (strongName == null) { 
                    throw new ArgumentException(Environment.GetResourceString("Argument_NullFullTrustAssembly"));
                }

                fullTrustList.Add(new StrongName(strongName.PublicKey, strongName.Name, strongName.Version)); 
            }
 
            m_fullTrustAssemblies = fullTrustList.AsReadOnly(); 
        }
 
#if FEATURE_CLICKONCE
        public ApplicationIdentity ApplicationIdentity {
            get {
                return m_appId; 
            }
            set { 
                if (value == null) 
                    throw new ArgumentNullException(Environment.GetResourceString("Argument_InvalidAppId"));
                Contract.EndContractBlock(); 
                m_appId = value;
            }
        }
#endif 
        public PolicyStatement DefaultGrantSet {
            get { 
                if (m_psDefaultGrant == null) 
                    return new PolicyStatement(new PermissionSet(PermissionState.None));
                return m_psDefaultGrant; 
            }
            set {
                if (value == null) {
                    m_psDefaultGrant = null; 
                    m_grantSetSpecialFlags = 0;
                } 
                else { 
                    m_psDefaultGrant = value;
                    m_grantSetSpecialFlags = SecurityManager.GetSpecialFlags(m_psDefaultGrant.PermissionSet, null); 
                }
            }
        }
 
        public IList FullTrustAssemblies {
            get { 
                return m_fullTrustAssemblies; 
            }
        } 
#if FEATURE_CLICKONCE
        public bool IsApplicationTrustedToRun {
            get {
                return m_appTrustedToRun; 
            }
            set { 
                m_appTrustedToRun = value; 
            }
        } 

        public bool Persist {
            get {
                return m_persist; 
            }
            set { 
                m_persist = value; 
            }
        } 

         public object ExtraInfo {
            [System.Security.SecuritySafeCritical]  // auto-generated
            get { 
                if (m_elExtraInfo != null) {
                    m_extraInfo = ObjectFromXml(m_elExtraInfo); 
                    m_elExtraInfo = null; 
                }
                return m_extraInfo; 
            }
            set {
                m_elExtraInfo = null;
                m_extraInfo = value; 
            }
        } 
#endif //FEATURE_CLICKONCE 

#if FEATURE_CAS_POLICY 
        public SecurityElement ToXml () {
            SecurityElement elRoot = new SecurityElement("ApplicationTrust");
            elRoot.AddAttribute("version", "1");
 
#if FEATURE_CLICKONCE
            if (m_appId != null) { 
                elRoot.AddAttribute("FullName", SecurityElement.Escape(m_appId.FullName)); 
            }
            if (m_appTrustedToRun) { 
                elRoot.AddAttribute("TrustedToRun", "true");
            }
            if (m_persist) {
                elRoot.AddAttribute("Persist", "true"); 
            }
#endif // FEATURE_CLICKONCE 
 
            if (m_psDefaultGrant != null) {
                SecurityElement elDefaultGrant = new SecurityElement("DefaultGrant"); 
                elDefaultGrant.AddChild(m_psDefaultGrant.ToXml());
                elRoot.AddChild(elDefaultGrant);
            }
            if (m_fullTrustAssemblies.Count > 0) { 
                SecurityElement elFullTrustAssemblies = new SecurityElement("FullTrustAssemblies");
                foreach (StrongName fullTrustAssembly in m_fullTrustAssemblies) { 
                    elFullTrustAssemblies.AddChild(fullTrustAssembly.ToXml()); 
                }
                elRoot.AddChild(elFullTrustAssemblies); 
            }

#if FEATURE_CLICKONCE
            if (ExtraInfo != null) { 
                elRoot.AddChild(ObjectToXml("ExtraInfo", ExtraInfo));
            } 
#endif // FEATURE_CLICKONCE 
            return elRoot;
        } 

        public void FromXml (SecurityElement element) {
            if (element == null)
                throw new ArgumentNullException("element"); 
            if (String.Compare(element.Tag, "ApplicationTrust", StringComparison.Ordinal) != 0)
                throw new ArgumentException(Environment.GetResourceString("Argument_InvalidXML")); 
 
#if FEATURE_CLICKONCE
            m_appTrustedToRun = false; 
            string isAppTrustedToRun = element.Attribute("TrustedToRun");
            if (isAppTrustedToRun != null && String.Compare(isAppTrustedToRun, "true", StringComparison.Ordinal) == 0) {
                m_appTrustedToRun = true;
            } 

            m_persist = false; 
            string persist = element.Attribute("Persist"); 
            if (persist != null && String.Compare(persist, "true", StringComparison.Ordinal) == 0) {
                m_persist = true; 
            }

            m_appId = null;
            string fullName = element.Attribute("FullName"); 
            if (fullName != null && fullName.Length > 0) {
                m_appId = new ApplicationIdentity(fullName); 
            } 
#endif // FEATURE_CLICKONCE
 
            m_psDefaultGrant = null;
            m_grantSetSpecialFlags = 0;
            SecurityElement elDefaultGrant = element.SearchForChildByTag("DefaultGrant");
            if (elDefaultGrant != null) { 
                SecurityElement elDefaultGrantPS = elDefaultGrant.SearchForChildByTag("PolicyStatement");
                if (elDefaultGrantPS != null) { 
                    PolicyStatement ps = new PolicyStatement(null); 
                    ps.FromXml(elDefaultGrantPS);
                    m_psDefaultGrant = ps; 
                    m_grantSetSpecialFlags = SecurityManager.GetSpecialFlags(ps.PermissionSet, null);
                }
            }
 
            List fullTrustAssemblies = new List();
            SecurityElement elFullTrustAssemblies = element.SearchForChildByTag("FullTrustAssemblies"); 
            if (elFullTrustAssemblies != null && elFullTrustAssemblies.InternalChildren != null) { 
                IEnumerator enumerator = elFullTrustAssemblies.Children.GetEnumerator();
                while (enumerator.MoveNext()) { 
                    StrongName fullTrustAssembly = new StrongName();
                    fullTrustAssembly.FromXml(enumerator.Current as SecurityElement);
                    fullTrustAssemblies.Add(fullTrustAssembly);
                } 
            }
 
            m_fullTrustAssemblies = fullTrustAssemblies.AsReadOnly(); 

#if FEATURE_CLICKONCE 
            m_elExtraInfo = element.SearchForChildByTag("ExtraInfo");
#endif // FEATURE_CLICKONCE
        }
 
#if FEATURE_CLICKONCE
        private static SecurityElement ObjectToXml (string tag, Object obj) { 
            BCLDebug.Assert(obj != null, "You need to pass in an object"); 

            ISecurityEncodable encodableObj = obj as ISecurityEncodable; 

            SecurityElement elObject;
            if (encodableObj != null) {
                elObject = encodableObj.ToXml(); 
                if (!elObject.Tag.Equals(tag))
                    throw new ArgumentException(Environment.GetResourceString("Argument_InvalidXML")); 
            } 

            MemoryStream stream = new MemoryStream(); 
            BinaryFormatter formatter = new BinaryFormatter();
            formatter.Serialize(stream, obj);
            byte[] array = stream.ToArray();
 
            elObject = new SecurityElement(tag);
            elObject.AddAttribute("Data", Hex.EncodeHexString(array)); 
            return elObject; 
        }
 
        private static Object ObjectFromXml (SecurityElement elObject) {
            BCLDebug.Assert(elObject != null, "You need to pass in a security element");

            if (elObject.Attribute("class") != null) { 
                ISecurityEncodable encodableObj = XMLUtil.CreateCodeGroup(elObject) as ISecurityEncodable;
                if (encodableObj != null) { 
                    encodableObj.FromXml(elObject); 
                    return encodableObj;
                } 
            }

            string objectData = elObject.Attribute("Data");
            MemoryStream stream = new MemoryStream(Hex.DecodeHexString(objectData)); 
            BinaryFormatter formatter = new BinaryFormatter();
            return formatter.Deserialize(stream); 
        } 
#endif // FEATURE_CLICKONCE
#endif // FEATURE_CAS_POLICY 
    }

#if FEATURE_CLICKONCE
    [System.Security.SecurityCritical]  // auto-generated_required 
    [System.Runtime.InteropServices.ComVisible(true)]
    public sealed class ApplicationTrustCollection : ICollection { 
        private const string ApplicationTrustProperty = "ApplicationTrust"; 
        private const string InstallerIdentifier = "{60051b8f-4f12-400a-8e50-dd05ebd438d1}";
        private static Guid ClrPropertySet = new Guid("c989bb7a-8385-4715-98cf-a741a8edb823"); 

        // The CLR specific constant install reference.
        private static object s_installReference = null;
        private static StoreApplicationReference InstallReference { 
            get {
                if (s_installReference == null) { 
                    Interlocked.CompareExchange(ref s_installReference, 
                                                new StoreApplicationReference(
                                                    IsolationInterop.GUID_SXS_INSTALL_REFERENCE_SCHEME_OPAQUESTRING, 
                                                    InstallerIdentifier,
                                                    null),
                                                null);
                } 
                return (StoreApplicationReference) s_installReference;
            } 
        } 

        private object m_appTrusts = null; 
        private ArrayList AppTrusts {
            [System.Security.SecurityCritical]  // auto-generated
            get {
                if (m_appTrusts == null) { 
                    ArrayList appTrusts = new ArrayList();
                    if (m_storeBounded) { 
                        RefreshStorePointer(); 
                        // enumerate the user store and populate the collection
                        StoreDeploymentMetadataEnumeration deplEnum = m_pStore.EnumInstallerDeployments(IsolationInterop.GUID_SXS_INSTALL_REFERENCE_SCHEME_OPAQUESTRING, InstallerIdentifier, ApplicationTrustProperty, null); 
                        foreach (IDefinitionAppId defAppId in deplEnum) {
                            StoreDeploymentMetadataPropertyEnumeration metadataEnum = m_pStore.EnumInstallerDeploymentProperties(IsolationInterop.GUID_SXS_INSTALL_REFERENCE_SCHEME_OPAQUESTRING, InstallerIdentifier, ApplicationTrustProperty, defAppId);
                            foreach (StoreOperationMetadataProperty appTrustProperty in metadataEnum) {
                                string appTrustXml = appTrustProperty.Value; 
                                if (appTrustXml != null && appTrustXml.Length > 0) {
                                    SecurityElement seTrust = SecurityElement.FromString(appTrustXml); 
                                    ApplicationTrust appTrust = new ApplicationTrust(); 
                                    appTrust.FromXml(seTrust);
                                    appTrusts.Add(appTrust); 
                                }
                            }
                        }
                    } 
                    Interlocked.CompareExchange(ref m_appTrusts, appTrusts, null);
                } 
                return m_appTrusts as ArrayList; 
            }
        } 

        private bool m_storeBounded = false;
        private Store m_pStore = null; // Component store interface pointer.
 
        // Only internal constructors are exposed.
        [System.Security.SecurityCritical]  // auto-generated 
        internal ApplicationTrustCollection () : this(false) {} 
        internal ApplicationTrustCollection (bool storeBounded) {
            m_storeBounded = storeBounded; 
        }

        [System.Security.SecurityCritical]  // auto-generated
        private void RefreshStorePointer () { 
            // Refresh store pointer.
            if (m_pStore != null) 
                Marshal.ReleaseComObject(m_pStore.InternalStore); 
            m_pStore = IsolationInterop.GetUserStore();
        } 

        public int Count
        {
            [System.Security.SecuritySafeCritical] // overrides public transparent member 
            get {
                return AppTrusts.Count; 
            } 
        }
 
        public ApplicationTrust this[int index] {
            [System.Security.SecurityCritical]  // auto-generated
            get {
                return AppTrusts[index] as ApplicationTrust; 
            }
        } 
 
        public ApplicationTrust this[string appFullName] {
            [System.Security.SecurityCritical]  // auto-generated 
            get {
                ApplicationIdentity identity = new ApplicationIdentity(appFullName);
                ApplicationTrustCollection appTrusts = Find(identity, ApplicationVersionMatch.MatchExactVersion);
                if (appTrusts.Count > 0) 
                    return appTrusts[0];
                return null; 
            } 
        }
 
        [System.Security.SecurityCritical]  // auto-generated
        [ResourceExposure(ResourceScope.None)]
        [ResourceConsumption(ResourceScope.Machine, ResourceScope.Machine)]
        private void CommitApplicationTrust(ApplicationIdentity applicationIdentity, string trustXml) { 
            StoreOperationMetadataProperty[] properties = new StoreOperationMetadataProperty[] {
                    new StoreOperationMetadataProperty(ClrPropertySet, ApplicationTrustProperty, trustXml) 
                }; 

            IEnumDefinitionIdentity idenum = applicationIdentity.Identity.EnumAppPath(); 
            IDefinitionIdentity[] asbId = new IDefinitionIdentity[1];
            IDefinitionIdentity deplId = null;
            if (idenum.Next(1, asbId) == 1)
                deplId = asbId[0]; 

            IDefinitionAppId defAppId = IsolationInterop.AppIdAuthority.CreateDefinition(); 
            defAppId.SetAppPath(1, new IDefinitionIdentity[] {deplId}); 
            defAppId.put_Codebase(applicationIdentity.CodeBase);
 
            using (StoreTransaction storeTxn = new StoreTransaction()) {
                storeTxn.Add(new StoreOperationSetDeploymentMetadata(defAppId, InstallReference, properties));
                RefreshStorePointer();
                m_pStore.Transact(storeTxn.Operations); 
            }
 
            m_appTrusts = null; // reset the app trusts in the collection. 
        }
 
        [System.Security.SecurityCritical]  // auto-generated
        public int Add (ApplicationTrust trust) {
            if (trust == null)
                throw new ArgumentNullException("trust"); 
            if (trust.ApplicationIdentity == null)
                throw new ArgumentException(Environment.GetResourceString("Argument_ApplicationTrustShouldHaveIdentity")); 
            Contract.EndContractBlock(); 

            // Add the trust decision of the application to the fusion store. 
            if (m_storeBounded) {
                CommitApplicationTrust(trust.ApplicationIdentity, trust.ToXml().ToString());
                return -1;
            } else { 
                return AppTrusts.Add(trust);
            } 
        } 

        [System.Security.SecurityCritical]  // auto-generated 
        public void AddRange (ApplicationTrust[] trusts) {
            if (trusts == null)
                throw new ArgumentNullException("trusts");
            Contract.EndContractBlock(); 

            int i=0; 
            try { 
                for (; i 
        [System.Security.SecuritySafeCritical] // overrides public transparent member
        IEnumerator IEnumerable.GetEnumerator() 
        { 
            return new ApplicationTrustEnumerator(this);
        } 

        /// 
        [System.Security.SecuritySafeCritical] // overrides public transparent member
        void ICollection.CopyTo(Array array, int index) { 
            if (array == null)
                throw new ArgumentNullException("array"); 
            if (array.Rank != 1) 
                throw new ArgumentException(Environment.GetResourceString("Arg_RankMultiDimNotSupported"));
            if (index < 0 || index >= array.Length) 
                throw new ArgumentOutOfRangeException("index", Environment.GetResourceString("ArgumentOutOfRange_Index"));
            if (array.Length - index < this.Count)
                throw new ArgumentException(Environment.GetResourceString("Argument_InvalidOffLen"));
            Contract.EndContractBlock(); 

            for (int i=0; i < this.Count; i++) { 
                array.SetValue(this[i], index++); 
            }
        } 

        public void CopyTo (ApplicationTrust[] array, int index) {
            ((ICollection)this).CopyTo(array, index);
        } 

        public bool IsSynchronized { 
            [System.Security.SecuritySafeCritical] // overrides public transparent member 
            get
            { 
                return false;
            }
        }
 
        public object SyncRoot {
            [System.Security.SecuritySafeCritical] // overrides public transparent member 
            get 
            {
                return this; 
            }
        }
    }
 
    [System.Runtime.InteropServices.ComVisible(true)]
    public sealed class ApplicationTrustEnumerator : IEnumerator { 
        [System.Security.SecurityCritical /*auto-generated*/] 
        private ApplicationTrustCollection m_trusts;
        private int m_current; 

        private ApplicationTrustEnumerator() {}
        [System.Security.SecurityCritical]  // auto-generated
        internal ApplicationTrustEnumerator(ApplicationTrustCollection trusts) { 
            m_trusts = trusts;
            m_current = -1; 
        } 

        public ApplicationTrust Current { 
            [System.Security.SecuritySafeCritical]  // auto-generated
            get {
                return m_trusts[m_current];
            } 
        }
 
        ///  
        object IEnumerator.Current {
            [System.Security.SecuritySafeCritical]  // auto-generated 
            get {
                return (object) m_trusts[m_current];
            }
        } 

        [System.Security.SecuritySafeCritical]  // auto-generated 
        public bool MoveNext() { 
            if (m_current == ((int) m_trusts.Count - 1))
                return false; 
            m_current++;
            return true;
        }
 
        public void Reset() {
            m_current = -1; 
        } 
    }
#endif // FEATURE_CLICKONCE 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
                        

Link Menu

Network programming in C#, Network Programming in VB.NET, Network Programming in .NET
This book is available now!
Buy at Amazon US or
Buy at Amazon UK