MasterKey 類別

The MasterKey object represents a SQL Server database master key.

繼承階層

System.Object
  Microsoft.SqlServer.Management.Smo.SmoObjectBase
    Microsoft.SqlServer.Management.Smo.SqlSmoObject
      Microsoft.SqlServer.Management.Smo.MasterKey

命名空間：  Microsoft.SqlServer.Management.Smo
組件：  Microsoft.SqlServer.Smo (在 Microsoft.SqlServer.Smo.dll 中)

語法

'宣告
Public NotInheritable Class MasterKey _
    Inherits SqlSmoObject _
    Implements ISfcSupportsDesignMode, IDroppable
'用途
Dim instance As MasterKey

public sealed class MasterKey : SqlSmoObject, 
    ISfcSupportsDesignMode, IDroppable

public ref class MasterKey sealed : public SqlSmoObject, 
    ISfcSupportsDesignMode, IDroppable

[<SealedAttribute>]
type MasterKey =  
    class 
        inherit SqlSmoObject 
        interface ISfcSupportsDesignMode 
        interface IDroppable 
    end

public final class MasterKey extends SqlSmoObject implements ISfcSupportsDesignMode, IDroppable

MasterKey 型別公開下列成員。

建構函式

	名稱	說明
	MasterKey()	Initializes a new instance of the MasterKey class.
	MasterKey(Database)	Initializes a new instance of the MasterKey class on the specified database.

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屬性

	名稱	說明
	CreateDate	Gets the date and time when the master key was created.
	DateLastModified	Gets the date and time when the master key was last modified.
	IsEncryptedByServer	Gets the Boolean property value that specifies whether the database master key is encrypted by using the service master key or by using a password.
	IsOpen	Gets the Boolean property value that specifies whether the database master key is open.
	Parent	Gets the Database object that is the parent of the MasterKey object.
	Properties	Gets a collection of Property objects that represent the object properties. (繼承自 SqlSmoObject。)
	State	Gets the state of the referenced object. (繼承自 SmoObjectBase。)
	Urn	Gets the Uniform Resource Name (URN) address value that uniquely identifies the object. (繼承自 SqlSmoObject。)
	UserData	Gets or sets user-defined data associated with the referenced object. (繼承自 SmoObjectBase。)

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方法

	名稱	說明
	AddPasswordEncryption	Adds password encryption to the master key.
	AddServiceKeyEncryption	Adds service key encryption to the master key.
	Close	Closes the master key.
	Create(String)	Creates a master key that has the specified password.
	Create(String, String, String)	Creates a master key from the specified file and that has the specified encryption and decryption passwords.
	Discover	Discovers a list of type Object. (繼承自 SqlSmoObject。)
	Drop	Removes the master key from the database.
	DropPasswordEncryption	Removes the password encryption from the master key by using the associated password.
	DropServiceKeyEncryption	Drops service key encryption from the master key.
	EnumKeyEncryptions	Enumerates a list of the current set of key encryptions for the database master key.
	Equals	(繼承自 Object。)
	Export	Saves the database master key to the specified system path location by using the specified password.
	FormatSqlVariant	Formats an object as SqlVariant type. (繼承自 SqlSmoObject。)
	GetContextDB	Gets the context database that is associated with this object. (繼承自 SqlSmoObject。)
	GetDBName	Gets the database name that is associated with the object. (繼承自 SqlSmoObject。)
	GetHashCode	(繼承自 Object。)
	GetPropValue	Gets a property value of the SqlSmoObject object. (繼承自 SqlSmoObject。)
	GetPropValueOptional	Gets a property value of the SqlSmoObject object. (繼承自 SqlSmoObject。)
	GetPropValueOptionalAllowNull	Gets a property value of the SqlSmoObject object. (繼承自 SqlSmoObject。)
	GetServerObject	Gets the server of the SqlSmoObject object. (繼承自 SqlSmoObject。)
	GetType	(繼承自 Object。)
	Import(String, String, String)	Loads the database master key from the file that is located at the specified system path by using the specified passwords to decrypt and encrypt the master key.
	Import(String, String, String, Boolean)	Loads the database master key from the file that is located at the specified system path by using the specified passwords to decrypt and encrypt the master key, and with the option to force regeneration.
	Initialize()	Initializes the object and forces the properties be loaded. (繼承自 SqlSmoObject。)
	Initialize(Boolean)	Initializes the object and forces the properties be loaded. (繼承自 SqlSmoObject。)
	IsObjectInitialized	Verifies whether the object has been initialized. (繼承自 SqlSmoObject。)
	IsObjectInSpace	Verifies whether the object is isolated or connected to the instance of SQL Server. (繼承自 SqlSmoObject。)
	Open	Opens the database master key by using the specified password.
	Refresh	Refreshes the object and retrieves properties when the object is next accessed. (繼承自 SqlSmoObject。)
	Regenerate(String)	Regenerates the database master key by using the specified new password.
	Regenerate(String, Boolean)	Regenerates the database master key by using the specified new password, and with the option to force the regeneration, thus removing all items that cannot be successfully decrypted.
	SetParentImpl	Sets the parent of the SqlSmoObject to the newParent parameter. (繼承自 SqlSmoObject。)
	ToString	Returns a String that represents the referenced object. (繼承自 SqlSmoObject。)
	Validate	Validates the state of an object. (繼承自 SmoObjectBase。)

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事件

	名稱	說明
	PropertyChanged	Represents the event that occurs when a property is changed. (繼承自 SqlSmoObject。)
	PropertyMetadataChanged	Represents the event that occurs when property metadata changes. (繼承自 SqlSmoObject。)

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明確 繼承 實作

	名稱	說明
	IAlienObject.Discover	Discovers any dependencies. 不要直接在程式碼中參照此成員。其支援 SQL Server 基礎結構。 (繼承自 SqlSmoObject。)
	IAlienObject.GetDomainRoot	Returns the root of the domain. (繼承自 SqlSmoObject。)
	IAlienObject.GetParent	Gets the parent of this object. 不要直接在程式碼中參照此成員。其支援 SQL Server 基礎結構。 (繼承自 SqlSmoObject。)
	IAlienObject.GetPropertyType	Gets the type of the specified property. (繼承自 SqlSmoObject。)
	IAlienObject.GetPropertyValue	Gets the value of the specified property. (繼承自 SqlSmoObject。)
	IAlienObject.GetUrn	Gets the Unified Resource Name (URN) of the object. 不要直接在程式碼中參照此成員。其支援 SQL Server 基礎結構。 (繼承自 SqlSmoObject。)
	IAlienObject.Resolve	Gets the instance that contains the information about the object from the Unified Resource Name (URN) of the object. (繼承自 SqlSmoObject。)
	IAlienObject.SetObjectState	Sets the object state to the specified SfcObjectState value. (繼承自 SqlSmoObject。)
	IAlienObject.SetPropertyValue	Sets the property value. (繼承自 SqlSmoObject。)
	ISfcPropertyProvider.GetPropertySet	Gets the interface reference to the set of properties of this object. (繼承自 SqlSmoObject。)
	ISfcSupportsDesignMode.IsDesignMode	Gets a Boolean value that indicates whether the object supports design mode. 僅供參考之用。不支援。我們無法保證未來的相容性。

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備註

A database master key is used to symmetrically encrypt keys and certificates that are stored in the database. A database master key can be encrypted by using the service master key or by using a user-specified password. When a database master key is created, a password must be supplied to encrypt and decrypt it.

When a database is attached to an instance of SQL Server, the database administrator must either supply the master key password or make an unencrypted copy of the master key that is available for encryption with the service master key.

The service master key is the top layer in the encryption hierarchy that is used to encrypt lower layers in the encryption hierarchy. The service master key is generated automatically by Windows. It can be opened only by the Windows service account under which it was created, or by a user who knows both the service account name and its password.

To get MasterKey object properties, users can be a member of the public fixed server role.

To set MasterKey object properties, users must have CONTROL permission on the database or be a member of the db_owner fixed database role.

To create or drop a master key, users must have CONTROL permission on the database or be a member of the db_owner fixed database role.

To open or regenerate a master key, users must have CONTROL permission on the database or be a member of the db_owner fixed database role.

To add or drop service key encryption, users must have CONTROL permission on the database or be a member of the db_owner fixed database role.

To drop a master key, users can be a member of the public fixed server role.

執行緒安全性

這個型別的任何公用 static (在 Visual Basic 中為 Shared) 成員都是執行緒安全的。並不是所有的執行個體成員都保證可以用於所有的執行緒。

請參閱

參考

Microsoft.SqlServer.Management.Smo 命名空間

其他資源

加密階層

CREATE MASTER KEY (Transact-SQL)