Evidence-Klasse
Definiert den Satz von Informationen, der als Eingabe für Entscheidungen über Sicherheitsrichtlinien verwendet wird. Diese Klasse kann nicht vererbt werden.
Namespace: System.Security.Policy
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
<SerializableAttribute> _
<ComVisibleAttribute(True)> _
Public NotInheritable Class Evidence
Implements ICollection, IEnumerable
'Usage
Dim instance As Evidence
[SerializableAttribute]
[ComVisibleAttribute(true)]
public sealed class Evidence : ICollection, IEnumerable
[SerializableAttribute]
[ComVisibleAttribute(true)]
public ref class Evidence sealed : ICollection, IEnumerable
/** @attribute SerializableAttribute() */
/** @attribute ComVisibleAttribute(true) */
public final class Evidence implements ICollection, IEnumerable
SerializableAttribute
ComVisibleAttribute(true)
public final class Evidence implements ICollection, IEnumerable
Hinweise
Häufig verwendete Beweise sind u. a. Signaturen und der Ursprungsort von Code. Es können jedoch auch andere Informationen herangezogen werden. Objekte eines beliebigen Typs, die von Sicherheitsrichtlinien als Beweise anerkannt werden.
Sicherheitsrichtlinien setzen sich aus Codegruppen zusammen. Eine bestimmte Assembly (die Basiseinheit von Code für das Erteilen von Sicherheitsberechtigungen) ist Mitglied einer Codegruppe, wenn sie deren Mitgliedschaftsbedingung erfüllt. Beweise sind die Eingaben in die Richtlinie, mit denen Mitgliedschaftsbedingungen bestimmen, zu welchen Codegruppen eine Assembly gehört.
Die Evidence-Klasse ist eine Auflistung (siehe ICollection) mit einem Satz von Objekten, die Beweise darstellen. Diese Klasse enthält zwei Sätze, die sich auf die jeweilige Beweisquelle beziehen: Hostbeweise und Assemblybeweise.
Eine Richtlinie kann beim Auswerten von Berechtigungen für Code Beweise aus zwei unterschiedlichen Quellen abrufen.
Host evidence wird vom Host bereitgestellt, wobei der Host jedoch über die ControlEvidence-Berechtigung verfügen muss. Hierbei handelt es sich i. d. R. um Beweise für den Ursprungsort des Codes und digitale Signaturen der Assembly. Zu den Beweisen für den Ursprung gehören Url, Site und Zone. Signaturen beziehen sich auf den Softwareherausgeber (AuthentiCode X.509v3-Signatur) und auf Identitäten für starke Namen. Beide Arten von auf digitalen Signaturen beruhenden Identitäten sind in die Assembly integriert, müssen aber durch den Host überprüft und an die Richtlinie übergeben werden. Nach dem Laden überprüft das Sicherheitssystem die Signatur. Anschließend werden die entsprechenden Beweise erstellt und an die Richtlinie übergeben, wenn die entsprechende Signatur gültig ist.
Assembly evidence ist Bestandteil der Assembly selbst. Entwickler oder Administratoren können benutzerdefinierte Beweise an die Assembly anhängen, um den Satz der Beweise für Richtlinien zu erweitern. Assemblybeweise können lediglich beim Erstellen der Assembly hinzugefügt werden, bevor die Assembly signiert wird. Die Standardrichtlinie des Sicherheitssystems ignoriert Beweise, die durch die Assembly bereitgestellt wurden. Die Richtlinie kann jedoch so angepasst werden, dass diese Beweise akzeptiert werden.
Beispiel
Im folgenden Beispiel wird das Erstellen neuer Evidence-Klassen mit sowohl einem Hostbeweis als auch einem Assemblybeweis veranschaulicht.
Imports System
Imports System.Collections
Imports System.Security
Imports System.Security.Policy
Imports System.Security.Permissions
Imports System.Globalization
Imports Microsoft.VisualBasic
Public Class Evidence_Example
Public Function CreateEvidence() As Boolean
Dim retVal As Boolean = True
Try
' Create empty evidence using the default contructor.
Dim ev1 As New Evidence
Console.WriteLine("Created empty evidence with the default constructor.")
' Constructor used to create null host evidence.
Dim ev2a As New Evidence(Nothing)
Console.WriteLine("Created an Evidence object with null host evidence.")
' Constructor used to create host evidence.
Dim url As New Url("http://www.treyresearch.com")
Console.WriteLine(("Adding host evidence " & url.ToString()))
ev2a.AddHost(url)
Dim ev2b As New Evidence(ev2a)
Console.WriteLine("Copy evidence into new evidence")
Dim enum1 As IEnumerator = ev2b.GetHostEnumerator()
enum1.MoveNext()
Console.WriteLine(enum1.Current.ToString())
' Constructor used to create both host and assembly evidence.
Dim oa1() As [Object]
Dim site As New Site("www.wideworldimporters.com")
Dim oa2 As [Object]() = {url, site}
Dim ev3a As New Evidence(oa1, oa2)
enum1 = ev3a.GetHostEnumerator()
Dim enum2 As IEnumerator = ev3a.GetAssemblyEnumerator()
enum2.MoveNext()
Dim obj1 As [Object] = enum2.Current
enum2.MoveNext()
Console.WriteLine(("URL = " & obj1.ToString() & " Site = " & enum2.Current.ToString()))
' Constructor used to create null host and null assembly evidence.
Dim ev3b As New Evidence(Nothing, Nothing)
Console.WriteLine("Create new evidence with null host and assembly evidence")
Catch e As Exception
Console.WriteLine("Fatal error: {0}", e.ToString())
Return False
End Try
Return retVal
End Function 'CreateEvidence
Public Function DemonstrateEvidenceMembers() As Evidence
Dim myEvidence As New Evidence
Dim sPubKeyBlob As String = "00240000048000009400000006020000" & "00240000525341310004000001000100" & "19390E945A40FB5730204A25FA5DC4DA" & "B18688B412CB0EDB87A6EFC50E2796C9" & "B41AD3040A7E46E4A02516C598678636" & "44A0F74C39B7AB9C38C01F10AF4A5752" & "BFBCDF7E6DD826676AD031E7BCE63393" & "495BAD2CA4BE03B529A73C95E5B06BE7" & "35CA0F622C63E8F54171BD73E4C8F193" & "CB2664163719CA41F8159B8AC88F8CD3"
Dim pubkey As [Byte]() = HexsToArray(sPubKeyBlob)
' Create a strong name.
Dim mSN As New StrongName(New StrongNamePublicKeyBlob(pubkey), "SN01", New Version("0.0.0.0"))
' Create assembly and host evidence.
Console.WriteLine("Adding assembly evidence.")
myEvidence.AddAssembly("SN01")
myEvidence.AddAssembly(New Version("0.0.0.0"))
myEvidence.AddAssembly(mSN)
Console.WriteLine(("Count of evidence items = " & myEvidence.Count.ToString()))
Dim url As New Url("http://www.treyresearch.com")
Console.WriteLine(("Adding host evidence " & url.ToString()))
myEvidence.AddHost(url)
PrintEvidence(myEvidence).ToString()
Console.WriteLine(("Count of evidence items = " & myEvidence.Count.ToString()))
Console.WriteLine(ControlChars.Lf & "Copy the evidence to an array using CopyTo, then display the array.")
Dim evidenceArray(myEvidence.Count - 1) As Object
myEvidence.CopyTo(evidenceArray, 0)
Dim obj As Object
For Each obj In evidenceArray
Console.WriteLine(obj.ToString())
Next obj
Console.WriteLine(ControlChars.Lf & "Display the contents of the properties.")
Console.WriteLine("Locked is the only property normally used by code.")
Console.WriteLine("IsReadOnly, IsSynchronized, and SyncRoot properties are not normally used.")
Console.WriteLine((ControlChars.Lf & "The default value for the Locked property = " & myEvidence.Locked.ToString()))
Console.WriteLine(ControlChars.Lf & "Get the hashcode for the evidence.")
Console.WriteLine(("HashCode = " & myEvidence.GetHashCode().ToString()))
Console.WriteLine(ControlChars.Lf & "Get the type for the evidence.")
Console.WriteLine(("Type = " & myEvidence.GetType().ToString()))
Console.WriteLine(ControlChars.Lf & "Merge new evidence with the current evidence.")
Dim oa1() As [Object]
Dim site As New Site("www.wideworldimporters.com")
Dim oa2 As [Object]() = {url, site}
Dim newEvidence As New Evidence(oa1, oa2)
myEvidence.Merge(newEvidence)
Console.WriteLine(("Evidence count = " & PrintEvidence(myEvidence).ToString()))
Console.WriteLine(ControlChars.Lf & "Remove URL evidence.")
myEvidence.RemoveType(url.GetType())
Console.WriteLine(("Evidence count is now: " & myEvidence.Count.ToString()))
Console.WriteLine(ControlChars.Lf & "Make a copy of the current evidence.")
Dim evidenceCopy As New Evidence(myEvidence)
Console.WriteLine(("Count of new evidence items = " & evidenceCopy.Count.ToString()))
Console.WriteLine(("Does the copy equal the current evidence? " & myEvidence.Equals(evidenceCopy)))
Console.WriteLine(ControlChars.Lf & "Clear the current evidence.")
myEvidence.Clear()
Console.WriteLine(("Count is now " & myEvidence.Count.ToString()))
Return myEvidence
End Function 'DemonstrateEvidenceMembers
Public Shared Function PrintEvidence(ByVal myEvidence As Evidence) As Integer
Dim p As Integer = 0
Console.WriteLine(ControlChars.Lf & "Current evidence = ")
If myEvidence Is Nothing Then
Return 0
End If
Dim list As IEnumerator = myEvidence.GetEnumerator()
Dim obj As Object
While list.MoveNext()
Console.WriteLine(list.Current.ToString())
p = p + 1
End While
Console.WriteLine(ControlChars.Lf)
Return p
End Function 'PrintEvidence
' Convert a hexidecimal string to an array.
Public Shared Function HexsToArray(ByVal sHexString As String) As Byte()
Dim array(sHexString.Length / 2) As [Byte]
Dim i As Integer
For i = 0 To sHexString.Length - 2 Step 2
array((i / 2)) = [Byte].Parse(sHexString.Substring(i, 2), NumberStyles.HexNumber)
Next i
Return array
End Function 'HexsToArray
' Main method.
Public Shared Sub Main()
Try
Dim EvidenceTest As New Evidence_Example
Dim ret As Boolean = EvidenceTest.CreateEvidence()
If ret Then
Console.WriteLine("Evidence successfully created.")
Else
Console.WriteLine("Evidence creation failed.")
End If
EvidenceTest.DemonstrateEvidenceMembers()
Catch e As Exception
Console.WriteLine(e.ToString())
Environment.ExitCode = 101
End Try
End Sub 'Main
End Class 'Evidence_Example
using System;
using System.Collections;
using System.Security;
using System.Security.Policy;
using System.Security.Permissions;
using System.Globalization;
public class Evidence_Example
{
public bool CreateEvidence()
{
bool retVal = true;
try
{
// Create empty evidence using the default contructor.
Evidence ev1 = new Evidence();
Console.WriteLine("Created empty evidence with the default constructor.");
// Constructor used to create null host evidence.
Evidence ev2a = new Evidence(null);
Console.WriteLine("Created an Evidence object with null host evidence.");
// Constructor used to create host evidence.
Url url = new Url("http://www.treyresearch.com");
Console.WriteLine("Adding host evidence " + url.ToString());
ev2a.AddHost(url);
Evidence ev2b = new Evidence(ev2a);
Console.WriteLine("Copy evidence into new evidence");
IEnumerator enum1 = ev2b.GetHostEnumerator();
enum1.MoveNext();
Console.WriteLine(enum1.Current.ToString());
// Constructor used to create both host and assembly evidence.
Object [] oa1 = {};
Site site = new Site("www.wideworldimporters.com");
Object [] oa2 = { url, site };
Evidence ev3a = new Evidence(oa1, oa2);
enum1 = ev3a.GetHostEnumerator();
IEnumerator enum2 = ev3a.GetAssemblyEnumerator();
enum2.MoveNext();
Object obj1 = enum2.Current;
enum2.MoveNext();
Console.WriteLine("URL = " + obj1.ToString() + " Site = " + enum2.Current.ToString());
// Constructor used to create null host and null assembly evidence.
Evidence ev3b = new Evidence(null, null);
Console.WriteLine("Create new evidence with null host and assembly evidence");
}
catch (Exception e)
{
Console.WriteLine("Fatal error: {0}", e.ToString());
return false;
}
return retVal;
}
public Evidence DemonstrateEvidenceMembers()
{
Evidence myEvidence = new Evidence();
string sPubKeyBlob = "00240000048000009400000006020000" +
"00240000525341310004000001000100" +
"19390E945A40FB5730204A25FA5DC4DA" +
"B18688B412CB0EDB87A6EFC50E2796C9" +
"B41AD3040A7E46E4A02516C598678636" +
"44A0F74C39B7AB9C38C01F10AF4A5752" +
"BFBCDF7E6DD826676AD031E7BCE63393" +
"495BAD2CA4BE03B529A73C95E5B06BE7" +
"35CA0F622C63E8F54171BD73E4C8F193" +
"CB2664163719CA41F8159B8AC88F8CD3";
Byte[] pubkey = HexsToArray(sPubKeyBlob);
// Create a strong name.
StrongName mSN = new StrongName(new StrongNamePublicKeyBlob(pubkey), "SN01", new Version("0.0.0.0"));
// Create assembly and host evidence.
Console.WriteLine("Adding assembly evidence.");
myEvidence.AddAssembly("SN01");
myEvidence.AddAssembly(new Version("0.0.0.0"));
myEvidence.AddAssembly(mSN);
Console.WriteLine("Count of evidence items = " + myEvidence.Count.ToString());
Url url = new Url("http://www.treyresearch.com");
Console.WriteLine("Adding host evidence " + url.ToString());
myEvidence.AddHost(url);
PrintEvidence(myEvidence).ToString();
Console.WriteLine("Count of evidence items = " + myEvidence.Count.ToString());
Console.WriteLine("\nCopy the evidence to an array using CopyTo, then display the array.");
object[] evidenceArray = new object[myEvidence.Count];
myEvidence.CopyTo(evidenceArray, 0);
foreach (object obj in evidenceArray)
{
Console.WriteLine(obj.ToString());
}
Console.WriteLine("\nDisplay the contents of the properties.");
Console.WriteLine("Locked is the only property normally used by code.");
Console.WriteLine("IsReadOnly, IsSynchronized, and SyncRoot properties are not normally used.");
Console.WriteLine("\nThe default value for the Locked property = " + myEvidence.Locked.ToString());
Console.WriteLine("\nGet the hashcode for the evidence.");
Console.WriteLine("HashCode = " + myEvidence.GetHashCode().ToString());
Console.WriteLine("\nGet the type for the evidence.");
Console.WriteLine("Type = " + myEvidence.GetType().ToString());
Console.WriteLine("\nMerge new evidence with the current evidence.");
Object [] oa1 = {};
Site site = new Site("www.wideworldimporters.com");
Object [] oa2 = { url, site };
Evidence newEvidence = new Evidence(oa1, oa2);
myEvidence.Merge(newEvidence);
Console.WriteLine("Evidence count = " + PrintEvidence(myEvidence).ToString());
Console.WriteLine("\nRemove URL evidence.");
myEvidence.RemoveType(url.GetType());
Console.WriteLine("Evidence count is now: " + myEvidence.Count.ToString());
Console.WriteLine("\nMake a copy of the current evidence.");
Evidence evidenceCopy = new Evidence(myEvidence);
Console.WriteLine("Count of new evidence items = " + evidenceCopy.Count);
Console.WriteLine("Does the copy equal the current evidence? " + myEvidence.Equals(evidenceCopy));
Console.WriteLine("\nClear the current evidence.");
myEvidence.Clear();
Console.WriteLine("Count is now " + myEvidence.Count.ToString());
return myEvidence;
}
public static int PrintEvidence(Evidence myEvidence)
{
int p = 0;
Console.WriteLine("\nCurrent evidence = ");
if (null == myEvidence) return 0;
IEnumerator list = myEvidence.GetEnumerator();
while (list.MoveNext())
{
Console.WriteLine(list.Current.ToString());
}
Console.WriteLine("\n");
return p;
}
// Convert a hexidecimal string to an array.
public static byte[] HexsToArray(string sHexString)
{
Byte[] array = new Byte[sHexString.Length/2];
for (int i = 0; i < sHexString.Length; i += 2)
{
array[i / 2] = Byte.Parse(sHexString.Substring(i, 2), NumberStyles.HexNumber);
}
return array;
}
// Main method.
public static void Main()
{
try
{
Evidence_Example EvidenceTest = new Evidence_Example();
bool ret = EvidenceTest.CreateEvidence();
if (ret)
{
Console.WriteLine("Evidence successfully created.");
}
else
{
Console.WriteLine("Evidence creation failed.");
}
EvidenceTest.DemonstrateEvidenceMembers();
}
catch(Exception e)
{
Console.WriteLine(e.ToString());
Environment.ExitCode = 101;
}
}
}
using namespace System;
using namespace System::Collections;
using namespace System::Security;
using namespace System::Security::Policy;
using namespace System::Security::Permissions;
using namespace System::Globalization;
public ref class Evidence_Example
{
public:
bool CreateEvidence()
{
bool retVal = true;
try
{
// Create empty evidence using the default contructor.
Evidence^ ev1 = gcnew Evidence;
Console::WriteLine( "Created empty evidence with the default constructor." );
// Constructor used to create null host evidence.
Evidence^ ev2a = gcnew Evidence( nullptr );
Console::WriteLine( "Created an Evidence object with null host evidence." );
// Constructor used to create host evidence.
Url^ url = gcnew Url( "http://www.treyresearch.com" );
Console::WriteLine( "Adding host evidence {0}", url );
ev2a->AddHost( url );
Evidence^ ev2b = gcnew Evidence( ev2a );
Console::WriteLine( "Copy evidence into new evidence" );
IEnumerator^ enum1 = ev2b->GetHostEnumerator();
enum1->MoveNext();
Console::WriteLine( enum1->Current );
// Constructor used to create both host and assembly evidence.
array<Object^>^oa1 = {};
Site^ site = gcnew Site( "www.wideworldimporters.com" );
array<Object^>^oa2 = {url,site};
Evidence^ ev3a = gcnew Evidence( oa1,oa2 );
enum1 = ev3a->GetHostEnumerator();
IEnumerator^ enum2 = ev3a->GetAssemblyEnumerator();
enum2->MoveNext();
Object^ obj1 = enum2->Current;
enum2->MoveNext();
Console::WriteLine( "URL = {0} Site = {1}", obj1, enum2->Current );
// Constructor used to create null host and null assembly evidence.
Evidence^ ev3b = gcnew Evidence( nullptr,nullptr );
Console::WriteLine( "Create new evidence with null host and assembly evidence" );
}
catch ( Exception^ e )
{
Console::WriteLine( "Fatal error: {0}", e );
return false;
}
return retVal;
}
Evidence^ DemonstrateEvidenceMembers()
{
Evidence^ myEvidence = gcnew Evidence;
String^ sPubKeyBlob = "00240000048000009400000006020000"
"00240000525341310004000001000100"
"19390E945A40FB5730204A25FA5DC4DA"
"B18688B412CB0EDB87A6EFC50E2796C9"
"B41AD3040A7E46E4A02516C598678636"
"44A0F74C39B7AB9C38C01F10AF4A5752"
"BFBCDF7E6DD826676AD031E7BCE63393"
"495BAD2CA4BE03B529A73C95E5B06BE7"
"35CA0F622C63E8F54171BD73E4C8F193"
"CB2664163719CA41F8159B8AC88F8CD3";
array<Byte>^pubkey = HexsToArray( sPubKeyBlob );
// Create a strong name.
StrongName^ mSN = gcnew StrongName( gcnew StrongNamePublicKeyBlob( pubkey ),"SN01",gcnew Version( "0.0.0.0" ) );
// Create assembly and host evidence.
Console::WriteLine( "Adding assembly evidence." );
myEvidence->AddAssembly( "SN01" );
myEvidence->AddAssembly( gcnew Version( "0.0.0.0" ) );
myEvidence->AddAssembly( mSN );
Console::WriteLine( "Count of evidence items = {0}", myEvidence->Count );
Url^ url = gcnew Url( "http://www.treyresearch.com" );
Console::WriteLine( "Adding host evidence {0}", url );
myEvidence->AddHost( url );
PrintEvidence( myEvidence ).ToString();
Console::WriteLine( "Count of evidence items = {0}", myEvidence->Count );
Console::WriteLine( "\nCopy the evidence to an array using CopyTo, then display the array." );
array<Object^>^evidenceArray = gcnew array<Object^>(myEvidence->Count);
myEvidence->CopyTo( evidenceArray, 0 );
for each (Object^ obj in evidenceArray)
{
Console::WriteLine(obj->ToString());
}
Console::WriteLine( "\nDisplay the contents of the properties." );
Console::WriteLine( "Locked is the only property normally used by code." );
Console::WriteLine( "IsReadOnly, IsSynchronized, and SyncRoot properties are not normally used." );
Console::WriteLine( "\nThe default value for the Locked property = {0}", myEvidence->Locked );
Console::WriteLine( "\nGet the hashcode for the evidence." );
Console::WriteLine( "HashCode = {0}", myEvidence->GetHashCode() );
Console::WriteLine( "\nGet the type for the evidence." );
Console::WriteLine( "Type = {0}", myEvidence->GetType() );
Console::WriteLine( "\nMerge new evidence with the current evidence." );
array<Object^>^oa1 = {};
Site^ site = gcnew Site( "www.wideworldimporters.com" );
array<Object^>^oa2 = {url,site};
Evidence^ newEvidence = gcnew Evidence( oa1,oa2 );
myEvidence->Merge( newEvidence );
Console::WriteLine( "Evidence count = {0}", PrintEvidence( myEvidence ) );
Console::WriteLine( "\nRemove URL evidence." );
myEvidence->RemoveType( url->GetType() );
Console::WriteLine( "Evidence count is now: {0}", myEvidence->Count );
Console::WriteLine( "\nMake a copy of the current evidence." );
Evidence^ evidenceCopy = gcnew Evidence( myEvidence );
Console::WriteLine( "Count of new evidence items = {0}", evidenceCopy->Count );
Console::WriteLine( "Does the copy equal the current evidence? {0}", myEvidence->Equals( evidenceCopy ) );
Console::WriteLine( "\nClear the current evidence." );
myEvidence->Clear();
Console::WriteLine( "Count is now {0}", myEvidence->Count );
return myEvidence;
}
static int PrintEvidence( Evidence^ myEvidence )
{
int p = 0;
Console::WriteLine( "\nCurrent evidence = " );
if ( nullptr == myEvidence )
return 0;
IEnumerator^ list = myEvidence->GetEnumerator();
IEnumerator^ myEnum1 = list;
while ( myEnum1->MoveNext() )
{
Object^ obj = safe_cast<Object^>(myEnum1->Current);
Console::WriteLine( obj );
p++;
}
Console::WriteLine( "\n" );
return p;
}
// Convert a hexadecimal string to an array.
static array<Byte>^ HexsToArray( String^ sHexString )
{
array<Byte>^arr = gcnew array<Byte>(sHexString->Length / 2);
for ( int i = 0; i < sHexString->Length; i += 2 )
{
arr[ i / 2 ] = Byte::Parse( sHexString->Substring( i, 2 ), NumberStyles::HexNumber );
}
return arr;
}
};
// Main method.
int main()
{
try
{
Evidence_Example^ EvidenceTest = gcnew Evidence_Example;
bool ret = EvidenceTest->CreateEvidence();
if ( ret )
{
Console::WriteLine( "Evidence successfully created." );
}
else
{
Console::WriteLine( "Evidence creation failed." );
}
EvidenceTest->DemonstrateEvidenceMembers();
}
catch ( Exception^ e )
{
Console::WriteLine( e );
Environment::ExitCode = 101;
}
}
import System.*;
import System.Collections.*;
import System.Security.*;
import System.Security.Policy.*;
import System.Security.Permissions.*;
import System.Globalization.*;
import System.Byte;
public class EvidenceExample
{
public boolean CreateEvidence()
{
boolean retVal = true;
try {
// Create empty evidence using the default contructor.
Evidence ev1 = new Evidence();
Console.WriteLine("Created empty evidence with the "
+ " default constructor.");
// Constructor used to create null host evidence.
Evidence ev2a = new Evidence(null);
Console.WriteLine("Created an Evidence object with "
+ " null host evidence.");
// Constructor used to create host evidence.
Url url = new Url("http://www.treyresearch.com");
Console.WriteLine(("Adding host evidence " + url.ToString()));
ev2a.AddHost(url);
Evidence ev2b = new Evidence(ev2a);
Console.WriteLine("Copy evidence into new evidence");
IEnumerator enum1 = ev2b.GetHostEnumerator();
enum1.MoveNext();
Console.WriteLine(enum1.get_Current().ToString());
// Constructor used to create both host and assembly evidence.
Object oa1[] = null;
Site site = new Site("www.wideworldimporters.com");
Object oa2[] = { url, site };
Evidence ev3a = new Evidence(oa1, oa2);
enum1 = ev3a.GetHostEnumerator();
IEnumerator enum2 = ev3a.GetAssemblyEnumerator();
enum2.MoveNext();
Object obj1 = enum2.get_Current();
enum2.MoveNext();
Console.WriteLine(("URL = " + obj1.ToString() + " Site = "
+ enum2.get_Current().ToString()));
// Constructor used to create null host and null assembly evidence.
Evidence ev3b = new Evidence(null, null);
Console.WriteLine("Create new evidence with null host and "
+ " assembly evidence");
}
catch (System.Exception e) {
Console.WriteLine("Fatal error: {0}", e.ToString());
return false;
}
return retVal;
} //CreateEvidence
public Evidence DemonstrateEvidenceMembers()
{
Evidence myEvidence = new Evidence();
String sPubKeyBlob = "00240000525341310004000001000100"
+ "19390E945A40FB5730204A25FA5DC4DA"
+ "B18688B412CB0EDB87A6EFC50E2796C9"
+ "B41AD3040A7E46E4A02516C598678636"
+ "44A0F74C39B7AB9C38C01F10AF4A5752"
+ "BFBCDF7E6DD826676AD031E7BCE63393"
+ "495BAD2CA4BE03B529A73C95E5B06BE7"
+ "35CA0F622C63E8F54171BD73E4C8F193"
+ "CB2664163719CA41F8159B8AC88F8CD3";
Byte pubkey[] = HexsToArray(sPubKeyBlob);
// Create a strong name.
StrongName mSN = new StrongName(
new StrongNamePublicKeyBlob((ubyte[])pubkey), "SN01",
new Version("0.0.0.0"));
// Create assembly and host evidence.
Console.WriteLine("Adding assembly evidence.");
myEvidence.AddAssembly("SN01");
myEvidence.AddAssembly(new Version("0.0.0.0"));
myEvidence.AddAssembly(mSN);
Console.WriteLine(("Count of evidence items = "
+ myEvidence.get_Count()));
Url url = new Url("http://www.treyresearch.com");
Console.WriteLine(("Adding host evidence " + url.ToString()));
myEvidence.AddHost(url);
String.valueOf(PrintEvidence(myEvidence));
Console.WriteLine(("Count of evidence items = "
+ myEvidence.get_Count()));
Console.WriteLine("\nCopy the evidence to an array using CopyTo,"
+ " then display the array.");
Object evidenceArray[] = new Object[myEvidence.get_Count()];
myEvidence.CopyTo(evidenceArray, 0);
for (int objCount = 0; objCount < evidenceArray.length; objCount++) {
Object obj = evidenceArray[objCount];
Console.WriteLine(obj.ToString());
}
Console.WriteLine("\nDisplay the contents of the properties.");
Console.WriteLine("Locked is the only property normally used by code.");
Console.WriteLine("IsReadOnly, IsSynchronized, and SyncRoot "
+ " properties are not normally used.");
Console.WriteLine(("\nThe default value for the Locked property = "
+ System.Convert.ToString(myEvidence.get_Locked())));
Console.WriteLine("\nGet the hashcode for the evidence.");
Console.WriteLine(("HashCode = " + myEvidence.GetHashCode()));
Console.WriteLine("\nGet the type for the evidence.");
Console.WriteLine(("Type = " + myEvidence.GetType().ToString()));
Console.WriteLine("\nMerge new evidence with the current evidence.");
Object oa1[] = null;
Site site = new Site("www.wideworldimporters.com");
Object oa2[] = { url, site };
Evidence newEvidence = new Evidence(oa1, oa2);
myEvidence.Merge(newEvidence);
Console.WriteLine(("Evidence count = " + PrintEvidence(myEvidence)));
Console.WriteLine("\nRemove URL evidence.");
myEvidence.RemoveType(url.GetType());
Console.WriteLine(("Evidence count is now: " + myEvidence.get_Count()));
Console.WriteLine("\nMake a copy of the current evidence.");
Evidence evidenceCopy = new Evidence(myEvidence);
Console.WriteLine(("Count of new evidence items = "
+ evidenceCopy.get_Count()));
Console.WriteLine(("Does the copy equal the current evidence? "
+ System.Convert.ToString(myEvidence.Equals(evidenceCopy))));
Console.WriteLine("\nClear the current evidence.");
myEvidence.Clear();
Console.WriteLine(("Count is now " + myEvidence.get_Count()));
return myEvidence;
} //DemonstrateEvidenceMembers
public static int PrintEvidence(Evidence myEvidence)
{
int p = 0;
Console.WriteLine("\nCurrent evidence = ");
if (null == myEvidence) {
return 0;
}
IEnumerator list = myEvidence.GetEnumerator();
while (list.MoveNext()) {
Console.WriteLine(String.valueOf(list.get_Current()));
}
Console.WriteLine("\n");
return p;
} //PrintEvidence
public static System.Byte[] HexsToArray(String sHexString)
{
Byte array[] = new Byte[sHexString.get_Length() / 2];
for (int i = 0; i < sHexString.get_Length(); i += 2) {
array[i / 2] = (Byte)Byte.Parse(sHexString.Substring(i, 2),
NumberStyles.HexNumber);
}
return array;
} //HexsToArray
public static void main(String[] args)
{
try {
EvidenceExample EvidenceTest = new EvidenceExample();
boolean ret = EvidenceTest.CreateEvidence();
if (ret) {
Console.WriteLine("Evidence successfully created.");
}
else {
Console.WriteLine("Evidence creation failed.");
}
EvidenceTest.DemonstrateEvidenceMembers();
}
catch (System.Exception e) {
Console.WriteLine(e.ToString());
Environment.set_ExitCode(101);
}
} //main
} //EvidenceExample
Vererbungshierarchie
System.Object
System.Security.Policy.Evidence
Threadsicherheit
Alle öffentlichen statischen (Shared in Visual Basic) Member dieses Typs sind threadsicher. Bei Instanzmembern ist die Threadsicherheit nicht gewährleistet.
Plattformen
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile für Pocket PC, Windows Mobile für Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.
Versionsinformationen
.NET Framework
Unterstützt in: 2.0, 1.1, 1.0
.NET Compact Framework
Unterstützt in: 2.0, 1.0