93 lines
3.3 KiB
C#
93 lines
3.3 KiB
C#
//------------------------------------------------------------
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//------------------------------------------------------------
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namespace System.ServiceModel.Security
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{
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using System.Text;
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using System.Security.Cryptography;
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public class DataProtectionSecurityStateEncoder : SecurityStateEncoder
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{
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byte[] entropy;
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bool useCurrentUserProtectionScope;
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public DataProtectionSecurityStateEncoder()
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: this(true)
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{
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// empty
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}
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public DataProtectionSecurityStateEncoder(bool useCurrentUserProtectionScope)
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: this(useCurrentUserProtectionScope, null)
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{ }
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public DataProtectionSecurityStateEncoder(bool useCurrentUserProtectionScope, byte[] entropy)
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{
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this.useCurrentUserProtectionScope = useCurrentUserProtectionScope;
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if (entropy == null)
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{
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this.entropy = null;
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}
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else
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{
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this.entropy = DiagnosticUtility.Utility.AllocateByteArray(entropy.Length);
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Buffer.BlockCopy(entropy, 0, this.entropy, 0, entropy.Length);
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}
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}
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public bool UseCurrentUserProtectionScope
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{
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get
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{
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return this.useCurrentUserProtectionScope;
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}
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}
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public byte[] GetEntropy()
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{
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byte[] result = null;
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if (this.entropy != null)
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{
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result = DiagnosticUtility.Utility.AllocateByteArray(this.entropy.Length);
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Buffer.BlockCopy(this.entropy, 0, result, 0, this.entropy.Length);
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}
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return result;
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}
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public override string ToString()
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{
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StringBuilder result = new StringBuilder();
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result.Append(this.GetType().ToString());
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result.AppendFormat("{0} UseCurrentUserProtectionScope={1}", Environment.NewLine, this.useCurrentUserProtectionScope);
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result.AppendFormat("{0} Entropy Length={1}", Environment.NewLine, (this.entropy == null) ? 0 : this.entropy.Length);
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return result.ToString();
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}
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protected internal override byte[] DecodeSecurityState( byte[] data )
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{
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try
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{
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return ProtectedData.Unprotect(data, this.entropy, (this.useCurrentUserProtectionScope) ? DataProtectionScope.CurrentUser : DataProtectionScope.LocalMachine);
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}
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catch (CryptographicException exception)
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{
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new CryptographicException(SR.GetString(SR.SecurityStateEncoderDecodingFailure), exception));
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}
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}
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protected internal override byte[] EncodeSecurityState( byte[] data )
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{
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try
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{
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return ProtectedData.Protect(data, this.entropy, (this.useCurrentUserProtectionScope) ? DataProtectionScope.CurrentUser : DataProtectionScope.LocalMachine);
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}
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catch (CryptographicException exception)
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{
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new CryptographicException(SR.GetString(SR.SecurityStateEncoderEncodingFailure), exception));
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}
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}
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}
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}
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