43 lines
1.5 KiB
C#
43 lines
1.5 KiB
C#
// Copyright (c) .NET Foundation. All rights reserved.
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// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
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using System;
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using Microsoft.Win32.SafeHandles;
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namespace Microsoft.AspNet.Cryptography.SafeHandles
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{
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internal unsafe sealed class NCryptDescriptorHandle : SafeHandleZeroOrMinusOneIsInvalid
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{
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private NCryptDescriptorHandle()
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: base(ownsHandle: true)
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{
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}
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public string GetProtectionDescriptorRuleString()
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{
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// from ncryptprotect.h
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const int NCRYPT_PROTECTION_INFO_TYPE_DESCRIPTOR_STRING = 0x00000001;
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LocalAllocHandle ruleStringHandle;
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int ntstatus = UnsafeNativeMethods.NCryptGetProtectionDescriptorInfo(
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hDescriptor: this,
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pMemPara: IntPtr.Zero,
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dwInfoType: NCRYPT_PROTECTION_INFO_TYPE_DESCRIPTOR_STRING,
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ppvInfo: out ruleStringHandle);
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UnsafeNativeMethods.ThrowExceptionForNCryptStatus(ntstatus);
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CryptoUtil.AssertSafeHandleIsValid(ruleStringHandle);
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using (ruleStringHandle)
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{
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return new String((char*)ruleStringHandle.DangerousGetHandle());
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}
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}
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// Do not provide a finalizer - SafeHandle's critical finalizer will call ReleaseHandle for you.
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protected override bool ReleaseHandle()
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{
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return (UnsafeNativeMethods.NCryptCloseProtectionDescriptor(handle) == 0);
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}
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}
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}
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