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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
//
//
//
// StrongName is an IIdentity representing strong names.
//
namespace System.Security.Policy {
using System.IO;
using System.Reflection;
using System.Security.Util;
using System.Security.Permissions;
using System.Diagnostics.Contracts;
using CultureInfo = System.Globalization.CultureInfo;
[Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
public sealed class StrongName : EvidenceBase, IIdentityPermissionFactory, IDelayEvaluatedEvidence
{
private StrongNamePublicKeyBlob m_publicKeyBlob;
private String m_name;
private Version m_version;
// Delay evaluated evidence is for policy resolution only, so it doesn't make sense to save that
// state away and then try to evaluate the strong name later.
[NonSerialized]
private RuntimeAssembly m_assembly = null;
[NonSerialized]
private bool m_wasUsed = false;
internal StrongName() {}
public StrongName( StrongNamePublicKeyBlob blob, String name, Version version ) : this(blob, name, version, null)
{
}
internal StrongName(StrongNamePublicKeyBlob blob, String name, Version version, Assembly assembly)
{
if (name == null)
throw new ArgumentNullException(nameof(name));
if (String.IsNullOrEmpty(name))
throw new ArgumentException(Environment.GetResourceString("Argument_EmptyStrongName"));
if (blob == null)
throw new ArgumentNullException(nameof(blob));
if (version == null)
throw new ArgumentNullException(nameof(version));
Contract.EndContractBlock();
RuntimeAssembly rtAssembly = assembly as RuntimeAssembly;
if (assembly != null && rtAssembly == null)
throw new ArgumentException(Environment.GetResourceString("Argument_MustBeRuntimeAssembly"), nameof(assembly));
m_publicKeyBlob = blob;
m_name = name;
m_version = version;
m_assembly = rtAssembly;
}
public StrongNamePublicKeyBlob PublicKey
{
get
{
return m_publicKeyBlob;
}
}
public String Name
{
get
{
return m_name;
}
}
public Version Version
{
get
{
return m_version;
}
}
bool IDelayEvaluatedEvidence.IsVerified
{
get
{
return true;
}
}
bool IDelayEvaluatedEvidence.WasUsed
{
get { return m_wasUsed; }
}
void IDelayEvaluatedEvidence.MarkUsed()
{
m_wasUsed = true;
}
internal static bool CompareNames( String asmName, String mcName )
{
if (mcName.Length > 0 && mcName[mcName.Length-1] == '*' && mcName.Length - 1 <= asmName.Length)
return String.Compare( mcName, 0, asmName, 0, mcName.Length - 1, StringComparison.OrdinalIgnoreCase) == 0;
else
return String.Compare( mcName, asmName, StringComparison.OrdinalIgnoreCase) == 0;
}
public IPermission CreateIdentityPermission( Evidence evidence )
{
return new StrongNameIdentityPermission( m_publicKeyBlob, m_name, m_version );
}
public override EvidenceBase Clone()
{
return new StrongName(m_publicKeyBlob, m_name, m_version);
}
public Object Copy()
{
return Clone();
}
public override bool Equals( Object o )
{
StrongName that = (o as StrongName);
return (that != null) &&
Equals( this.m_publicKeyBlob, that.m_publicKeyBlob ) &&
Equals( this.m_name, that.m_name ) &&
Equals( this.m_version, that.m_version );
}
public override int GetHashCode()
{
if (m_publicKeyBlob != null)
{
return m_publicKeyBlob.GetHashCode();
}
else if (m_name != null || m_version != null)
{
return (m_name == null ? 0 : m_name.GetHashCode()) + (m_version == null ? 0 : m_version.GetHashCode());
}
else
{
return typeof( StrongName ).GetHashCode();
}
}
// INormalizeForIsolatedStorage is not implemented for startup perf
// equivalent to INormalizeForIsolatedStorage.Normalize()
internal Object Normalize()
{
MemoryStream ms = new MemoryStream();
BinaryWriter bw = new BinaryWriter(ms);
bw.Write(m_publicKeyBlob.PublicKey);
bw.Write(m_version.Major);
bw.Write(m_name);
ms.Position = 0;
return ms;
}
}
}
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