/// <summary>
/// Initializes a new instance of the <see cref="IsolatedStorageBackingStore"/> class given the configuration data
/// </summary>
/// <param name="configurationView">An <see cref="CachingConfigurationView"></see> object</param>
public override void Initialize(ConfigurationView configurationView)
{
ArgumentValidation.CheckForNullReference(configurationView, "configurationView");
ArgumentValidation.CheckExpectedType(configurationView, typeof(CachingConfigurationView));
CachingConfigurationView cachingConfigurationView = (CachingConfigurationView)configurationView;
IsolatedStorageCacheStorageData isoStoreConfigurationData = (IsolatedStorageCacheStorageData)cachingConfigurationView.GetCacheStorageDataForCacheManager(CurrentCacheManager);
if (isoStoreConfigurationData.PartitionName == null)
{
throw new ConfigurationException(SR.IsolatedStoreAreaNameNullException(isoStoreConfigurationData.Name));
}
if (isoStoreConfigurationData.PartitionName.Length == 0)
{
throw new ConfigurationException(SR.IsolatedStoreAreaNameEmptyException(isoStoreConfigurationData.Name));
}
this.storageAreaName = isoStoreConfigurationData.PartitionName;
if (isoStoreConfigurationData.StorageEncryption != null)
{
StorageEncryptionFactory encryptionFactory = new StorageEncryptionFactory(cachingConfigurationView.ConfigurationContext);
this.encryptionProvider = encryptionFactory.CreateSymmetricProvider(CurrentCacheManager);
}
Initialize();
}
public IsolatedStorageBackingStore(string storageAreaName, IStorageEncryptionProvider encryptionProvider)
{
if (string.IsNullOrEmpty(storageAreaName)) throw new ArgumentException(Resources.ExceptionStorageAreaNullOrEmpty, "storageAreaName");
this.storageAreaName = storageAreaName;
this.encryptionProvider = encryptionProvider;
Initialize();
}
private void NullEncryptorTests(string instanceName)
{
MockStorageEncryptionProvider.Encrypted = false;
MockStorageEncryptionProvider.Decrypted = false;
CacheManagerSettings settings = (CacheManagerSettings)TestConfigurationSource.GenerateConfiguration().GetSection(CacheManagerSettings.SectionName);
CacheStorageData cacheStorageData = settings.BackingStores.Get(settings.CacheManagers.Get(instanceName).CacheStorage);
StorageEncryptionProviderData encryptionProviderData = settings.EncryptionProviders.Get(cacheStorageData.StorageEncryption);
IStorageEncryptionProvider provider =
EnterpriseLibraryFactory.BuildUp <IStorageEncryptionProvider>(encryptionProviderData.Name, TestConfigurationSource.GenerateConfiguration());
Assert.IsNotNull(provider);
byte[] input = new byte[] { 0, 1, 2, 3, 4, 5 };
byte[] encrypted = provider.Encrypt(input);
Assert.IsTrue(MockStorageEncryptionProvider.Encrypted, "static encrypted");
Assert.IsTrue(CompareBytes(input, encrypted), "no encryption performed");
byte[] decrypted = provider.Decrypt(encrypted);
Assert.IsTrue(MockStorageEncryptionProvider.Decrypted, "static decrypted");
Assert.IsTrue(CompareBytes(encrypted, decrypted), "no decryption performed");
Assert.IsTrue(CompareBytes(input, decrypted), "no decryption performed2");
}
/// <summary>
/// This is public purely for unit testing purposes and should never be called by application code
/// </summary>
/// <param name="database">Database to use for persistence</param>
/// <param name="databasePartitionName">Partition name in database</param>
/// <param name="encryptionProvider">Provider used for encryption</param>
public DataBackingStore(Data.Database database,
string databasePartitionName,
IStorageEncryptionProvider encryptionProvider)
{
this.database = database;
partitionName = databasePartitionName;
this.encryptionProvider = encryptionProvider;
}
/// <summary>
/// This is public purely for unit testing purposes and should never be called by application code
/// </summary>
/// <param name="database">Database to use for persistence</param>
/// <param name="databasePartitionName">Partition name in database</param>
/// <param name="encryptionProvider">Provider used for encryption</param>
public DataBackingStore(Data.Database database,
string databasePartitionName,
IStorageEncryptionProvider encryptionProvider)
{
this.database = database;
partitionName = databasePartitionName;
this.encryptionProvider = encryptionProvider;
}
public IsolatedStorageCacheItemField(IsolatedStorageFile storage, string fieldName,
string fileSystemLocation, IStorageEncryptionProvider encryptionProvider)
{
this.fieldName = fieldName;
this.fileSystemLocation = fileSystemLocation;
this.storage = storage;
this.encryptionProvider = encryptionProvider;
}
/// <summary>
/// Instance constructor
/// </summary>
/// <param name="storage">IsolatedStorage area to use. May not be null.</param>
/// <param name="fieldName">Name of the file in which the field value is stored. May not be null.</param>
/// <param name="fileSystemLocation">Complete path to directory where file specified in fieldName is to be found. May not be null.</param>
/// <param name="encryptionProvider">Encryption provider</param>
public IsolatedStorageCacheItemField(IsolatedStorageFile storage, string fieldName,
string fileSystemLocation, IStorageEncryptionProvider encryptionProvider)
{
this.fieldName = fieldName;
this.fileSystemLocation = fileSystemLocation;
this.storage = storage;
this.encryptionProvider = encryptionProvider;
}
public void AttemptingToReadEncryptedDataWithoutDecryptingThrowsException()
{
StorageEncryptionFactory factory = new StorageEncryptionFactory(Context);
IStorageEncryptionProvider encryptionProvider = factory.CreateSymmetricProvider(CacheManagerName);
DataBackingStore encryptingBackingStore = new DataBackingStore(db, "encryptionTests", encryptionProvider);
encryptingBackingStore.Add(new CacheItem("key", "value", CacheItemPriority.Normal, new MockRefreshAction(), new AlwaysExpired()));
Hashtable dataInCache = unencryptedBackingStore.Load();
}
public IsolatedStorageBackingStore(string storageAreaName, IStorageEncryptionProvider encryptionProvider)
{
if (string.IsNullOrEmpty(storageAreaName))
{
throw new ArgumentException(Resources.ExceptionStorageAreaNullOrEmpty, "storageAreaName");
}
this.storageAreaName = storageAreaName;
this.encryptionProvider = encryptionProvider;
Initialize();
}
/// <summary>
/// Instance constructor. Ensures that the storage location in Isolated Storage is prepared
/// for reading and writing. This class stores each individual field of the CacheItem into its own
/// file inside the directory specified by itemDirectoryRoot.
/// </summary>
/// <param name="storage">Isolated Storage area to use. May not be null.</param>
/// <param name="itemDirectoryRoot">Complete path in Isolated Storage where the cache item should be stored. May not be null.</param>
/// <param name="encryptionProvider">Encryption provider</param>
public IsolatedStorageCacheItem(IsolatedStorageFile storage, string itemDirectoryRoot, IStorageEncryptionProvider encryptionProvider)
{
storage.CreateDirectory(itemDirectoryRoot);
keyField = new IsolatedStorageCacheItemField(storage, "Key", itemDirectoryRoot, encryptionProvider);
valueField = new IsolatedStorageCacheItemField(storage, "Val", itemDirectoryRoot, encryptionProvider);
scavengingPriorityField = new IsolatedStorageCacheItemField(storage, "ScPr", itemDirectoryRoot, encryptionProvider);
refreshActionField = new IsolatedStorageCacheItemField(storage, "RA", itemDirectoryRoot, encryptionProvider);
expirationsField = new IsolatedStorageCacheItemField(storage, "Exp", itemDirectoryRoot, encryptionProvider);
lastAccessedField = new IsolatedStorageCacheItemField(storage, "LA", itemDirectoryRoot, encryptionProvider);
}
public void AttemptingToReadEncryptedDataWithoutDecryptingThrowsException()
{
IStorageEncryptionProvider encryptionProvider = null;
encryptionProvider = EnterpriseLibraryFactory.BuildUp <IStorageEncryptionProvider>("Fred");
DataBackingStore encryptingBackingStore = new DataBackingStore(db, "encryptionTests", encryptionProvider);
encryptingBackingStore.Add(new CacheItem("key", "value", CacheItemPriority.Normal, new MockRefreshAction(), new AlwaysExpired()));
Hashtable dataInCache = unencryptedBackingStore.Load();
}
static void TestReadEncryptionProvider(IStorageProvider provider, IStorageEncryptionProvider encryptionProvider, byte[] iv)
{
var path = "testfolder\\testencryption990.jpeg";
var file = provider.GetFile(path);
var streamRead = file.OpenCryptoRead(encryptionProvider, iv);
FileStream fs = new FileStream(@"..\..\TestDecryptFile990.jpeg",
FileMode.OpenOrCreate,
FileAccess.Write);
CopyStream(streamRead, fs);
}
public IBackingStore Assemble(IBuilderContext context, CacheStorageData objectConfiguration, IConfigurationSource configurationSource, ConfigurationReflectionCache reflectionCache)
{
IsolatedStorageCacheStorageData castedObjectConfiguration
= (IsolatedStorageCacheStorageData)objectConfiguration;
IStorageEncryptionProvider encryptionProvider
= GetStorageEncryptionProvider(context, castedObjectConfiguration.StorageEncryption, configurationSource, reflectionCache);
IBackingStore createdObject
= new IsolatedStorageBackingStore(
castedObjectConfiguration.PartitionName,
encryptionProvider);
return(createdObject);
}
/// <summary>
/// Instance constructor. Ensures that the storage location in Isolated Storage is prepared
/// for reading and writing. This class stores each individual field of the CacheItem into its own
/// file inside the directory specified by itemDirectoryRoot.
/// </summary>
/// <param name="storage">Isolated Storage area to use. May not be null.</param>
/// <param name="itemDirectoryRoot">Complete path in Isolated Storage where the cache item should be stored. May not be null.</param>
/// <param name="encryptionProvider">Encryption provider</param>
public IsolatedStorageCacheItem(IsolatedStorageFile storage, string itemDirectoryRoot, IStorageEncryptionProvider encryptionProvider)
{
if (storage.GetDirectoryNames(itemDirectoryRoot).Length == 0)
{
// avoid creating if already exists - work around for partial trust
storage.CreateDirectory(itemDirectoryRoot);
}
keyField = new IsolatedStorageCacheItemField(storage, "Key", itemDirectoryRoot, encryptionProvider);
valueField = new IsolatedStorageCacheItemField(storage, "Val", itemDirectoryRoot, encryptionProvider);
scavengingPriorityField = new IsolatedStorageCacheItemField(storage, "ScPr", itemDirectoryRoot, encryptionProvider);
refreshActionField = new IsolatedStorageCacheItemField(storage, "RA", itemDirectoryRoot, encryptionProvider);
expirationsField = new IsolatedStorageCacheItemField(storage, "Exp", itemDirectoryRoot, encryptionProvider);
lastAccessedField = new IsolatedStorageCacheItemField(storage, "LA", itemDirectoryRoot, encryptionProvider);
}
static void TestWriteEncryptionProvider(IStorageProvider provider, IStorageEncryptionProvider encryptionProvider, byte[] iv)
{
byte[] buff = new byte[0];
var fileName = pathToTestFile;
FileStream fs = new FileStream(fileName,
FileMode.Open,
FileAccess.Read);
var path = "testfolder\\testencryption990.jpeg";
provider.DeleteFile(path);
var file = provider.CreateFile(path);
var streamWrite = file.OpenCryptoWrite(encryptionProvider, iv);
CopyStream(fs, streamWrite);
}
public void DecryptedDataCanBeReadBackFromDatabase()
{
StorageEncryptionFactory factory = new StorageEncryptionFactory(Context);
IStorageEncryptionProvider encryptionProvider = factory.CreateSymmetricProvider(CacheManagerName);
DataBackingStore encryptingBackingStore = new DataBackingStore(db, "encryptionTests", encryptionProvider);
encryptingBackingStore.Add(new CacheItem("key", "value", CacheItemPriority.Normal, new MockRefreshAction(), new AlwaysExpired()));
Hashtable dataInCache = encryptingBackingStore.Load();
CacheItem retrievedItem = (CacheItem)dataInCache["key"];
Assert.AreEqual("key", retrievedItem.Key);
Assert.AreEqual("value", retrievedItem.Value);
Assert.AreEqual(CacheItemPriority.Normal, retrievedItem.ScavengingPriority);
Assert.AreEqual(typeof(MockRefreshAction), retrievedItem.RefreshAction.GetType());
Assert.AreEqual(typeof(AlwaysExpired), retrievedItem.Expirations[0].GetType());
}
/// <summary>
/// Initializes a new instance of the <see cref="DataBackingStore"/> class
/// with the specified configuration information.
/// </summary>
/// <param name="configurationView">A <see cref="CachingConfigurationView"></see> object</param>
/// <exception cref="System.Configuration.ConfigurationException">Reflects any failures to read configuration information</exception>
/// <remarks>Other exceptions thrown depend on the implementation of the underlying database.</remarks>
public override void Initialize(ConfigurationView configurationView)
{
ArgumentValidation.CheckForNullReference(configurationView, "configurationView");
ArgumentValidation.CheckExpectedType(configurationView, typeof(CachingConfigurationView));
CachingConfigurationView cachingConfigurationView = (CachingConfigurationView)configurationView;
DataCacheStorageData dataConfiguration = (DataCacheStorageData)cachingConfigurationView.GetCacheStorageDataForCacheManager(CurrentCacheManager);
partitionName = dataConfiguration.PartitionName;
DatabaseProviderFactory dataFactory = new DatabaseProviderFactory(cachingConfigurationView.ConfigurationContext);
database = dataFactory.CreateDatabase(dataConfiguration.DatabaseInstanceName);
if (dataConfiguration.StorageEncryption != null)
{
StorageEncryptionFactory encryptionFactory = new StorageEncryptionFactory(cachingConfigurationView.ConfigurationContext);
encryptionProvider = encryptionFactory.CreateSymmetricProvider(CurrentCacheManager);
}
}
private CacheItem DoCacheItemRoundTripToStorage(CacheItem itemToStore, bool encrypted)
{
IStorageEncryptionProvider encryptionProvider = null;
if (encrypted)
{
encryptionProvider = new MockStorageEncryptionProvider();
}
string itemRoot = DirectoryRoot + itemToStore.Key;
IsolatedStorageCacheItem item = new IsolatedStorageCacheItem(storage, itemRoot, encryptionProvider);
item.Store(itemToStore);
IsolatedStorageCacheItem itemToRead = new IsolatedStorageCacheItem(storage, itemRoot, encryptionProvider);
return(itemToRead.Load());
}
/// <summary>
/// This method supports the Enterprise Library infrastructure and is not intended to be used directly from your code.
/// Builds an <see cref="DataBackingStore"/> based on an instance of <see cref="DataCacheStorageData"/>.
/// </summary>
/// <seealso cref="BackingStoreCustomFactory"/>
/// <param name="context">The <see cref="IBuilderContext"/> that represents the current building process.</param>
/// <param name="objectConfiguration">The configuration object that describes the object to build. Must be an instance of <see cref="DataCacheStorageData"/>.</param>
/// <param name="configurationSource">The source for configuration objects.</param>
/// <param name="reflectionCache">The cache to use retrieving reflection information.</param>
/// <returns>A fully initialized instance of <see cref="DataBackingStore"/>.</returns>
public IBackingStore Assemble(IBuilderContext context, CacheStorageData objectConfiguration, IConfigurationSource configurationSource, ConfigurationReflectionCache reflectionCache)
{
DataCacheStorageData castedObjectConfiguration
= (DataCacheStorageData)objectConfiguration;
Data.Database database
= (Data.Database)context.HeadOfChain.BuildUp(context, typeof(Data.Database), null, castedObjectConfiguration.DatabaseInstanceName);
IStorageEncryptionProvider encryptionProvider
= GetStorageEncryptionProvider(context, castedObjectConfiguration.StorageEncryption, configurationSource, reflectionCache);
IBackingStore createdObjet
= new DataBackingStore(
database,
castedObjectConfiguration.PartitionName,
encryptionProvider);
return(createdObjet);
}
public void DecryptedDataCanBeReadBackFromDatabase()
{
IStorageEncryptionProvider encryptionProvider = null;
encryptionProvider = EnterpriseLibraryFactory.BuildUp <IStorageEncryptionProvider>("Fred");
DataBackingStore encryptingBackingStore = new DataBackingStore(db, "encryptionTests", encryptionProvider);
encryptingBackingStore.Add(new CacheItem("key", "value", CacheItemPriority.Normal, new MockRefreshAction(), new AlwaysExpired()));
Hashtable dataInCache = encryptingBackingStore.Load();
CacheItem retrievedItem = (CacheItem)dataInCache["key"];
Assert.AreEqual("key", retrievedItem.Key);
Assert.AreEqual("value", retrievedItem.Value);
Assert.AreEqual(CacheItemPriority.Normal, retrievedItem.ScavengingPriority);
Assert.AreEqual(typeof(MockRefreshAction), retrievedItem.RefreshAction.GetType());
Assert.AreEqual(typeof(AlwaysExpired), retrievedItem.GetExpirations()[0].GetType());
}
private void NullEncryptorTests(string instanceName)
{
MockStorageEncryptionProvider.Encrypted = false;
MockStorageEncryptionProvider.Decrypted = false;
CacheManagerSettings settings = (CacheManagerSettings)Context.GetConfiguration(CacheManagerSettings.SectionName);
StorageEncryptionFactory factory = new StorageEncryptionFactory(Context);
IStorageEncryptionProvider provider = factory.CreateSymmetricProvider(settings.CacheManagers[instanceName].Name);
Assert.IsNotNull(provider);
byte[] input = new byte[] { 0, 1, 2, 3, 4, 5 };
byte[] encrypted = provider.Encrypt(input);
Assert.IsTrue(MockStorageEncryptionProvider.Encrypted, "static encrypted");
Assert.IsTrue(CompareBytes(input, encrypted), "no encryption performed");
byte[] decrypted = provider.Decrypt(encrypted);
Assert.IsTrue(MockStorageEncryptionProvider.Decrypted, "static decrypted");
Assert.IsTrue(CompareBytes(encrypted, decrypted), "no decryption performed");
Assert.IsTrue(CompareBytes(input, decrypted), "no decryption performed2");
}
public Stream OpenCryptoWrite(IStorageEncryptionProvider encryptionProvider, byte[] iv)
{
return(encryptionProvider.Encrypt(_blob.OpenWriteAsync().Result, iv));
}
/// <summary>
/// Instance constructor. Ensures that the storage location in Isolated Storage is prepared
/// for reading and writing. This class stores each individual field of the CacheItem into its own
/// file inside the directory specified by itemDirectoryRoot.
/// </summary>
/// <param name="storage">Isolated Storage area to use. May not be null.</param>
/// <param name="itemDirectoryRoot">Complete path in Isolated Storage where the cache item should be stored. May not be null.</param>
/// <param name="encryptionProvider">Encryption provider</param>
public IsolatedStorageCacheItem(IsolatedStorageFile storage, string itemDirectoryRoot, IStorageEncryptionProvider encryptionProvider)
{
if (storage.GetDirectoryNames(itemDirectoryRoot).Length == 0)
{
// avoid creating if already exists - work around for partial trust
storage.CreateDirectory(itemDirectoryRoot);
}
keyField = new IsolatedStorageCacheItemField(storage, "Key", itemDirectoryRoot, encryptionProvider);
valueField = new IsolatedStorageCacheItemField(storage, "Val", itemDirectoryRoot, encryptionProvider);
scavengingPriorityField = new IsolatedStorageCacheItemField(storage, "ScPr", itemDirectoryRoot, encryptionProvider);
refreshActionField = new IsolatedStorageCacheItemField(storage, "RA", itemDirectoryRoot, encryptionProvider);
expirationsField = new IsolatedStorageCacheItemField(storage, "Exp", itemDirectoryRoot, encryptionProvider);
lastAccessedField = new IsolatedStorageCacheItemField(storage, "LA", itemDirectoryRoot, encryptionProvider);
}
/// <summary>
/// Instance constructor. Ensures that the storage location in Isolated Storage is prepared
/// for reading and writing. This class stores each individual field of the CacheItem into its own
/// file inside the directory specified by itemDirectoryRoot.
/// </summary>
/// <param name="storage">Isolated Storage area to use. May not be null.</param>
/// <param name="itemDirectoryRoot">Complete path in Isolated Storage where the cache item should be stored. May not be null.</param>
/// <param name="encryptionProvider">Encryption provider</param>
public IsolatedStorageCacheItem(IsolatedStorageFile storage, string itemDirectoryRoot, IStorageEncryptionProvider encryptionProvider)
{
storage.CreateDirectory(itemDirectoryRoot);
keyField = new IsolatedStorageCacheItemField(storage, "Key", itemDirectoryRoot, encryptionProvider);
valueField = new IsolatedStorageCacheItemField(storage, "Val", itemDirectoryRoot, encryptionProvider);
scavengingPriorityField = new IsolatedStorageCacheItemField(storage, "ScPr", itemDirectoryRoot, encryptionProvider);
refreshActionField = new IsolatedStorageCacheItemField(storage, "RA", itemDirectoryRoot, encryptionProvider);
expirationsField = new IsolatedStorageCacheItemField(storage, "Exp", itemDirectoryRoot, encryptionProvider);
lastAccessedField = new IsolatedStorageCacheItemField(storage, "LA", itemDirectoryRoot, encryptionProvider);
}
public IsolatedStorageCacheItem(IsolatedStorageFile storage, string itemDirectoryRoot, IStorageEncryptionProvider encryptionProvider)
{
int retriesLeft = MaxRetries;
while (true)
{
try
{
storage.CreateDirectory(itemDirectoryRoot);
using (IsolatedStorageFileStream fileStream =
new IsolatedStorageFileStream(itemDirectoryRoot + @"\sanity-check.txt", FileMode.Create, FileAccess.Write, FileShare.None, storage))
{ }
break;
}
catch (UnauthorizedAccessException)
{
if (retriesLeft-- > 0)
{
Thread.Sleep(RetryDelayInMilliseconds);
continue;
}
throw;
}
catch (DirectoryNotFoundException)
{
if (retriesLeft-- > 0)
{
Thread.Sleep(RetryDelayInMilliseconds);
continue;
}
throw;
}
}
keyField = new IsolatedStorageCacheItemField(storage, "Key", itemDirectoryRoot, encryptionProvider);
valueField = new IsolatedStorageCacheItemField(storage, "Val", itemDirectoryRoot, encryptionProvider);
scavengingPriorityField = new IsolatedStorageCacheItemField(storage, "ScPr", itemDirectoryRoot, encryptionProvider);
refreshActionField = new IsolatedStorageCacheItemField(storage, "RA", itemDirectoryRoot, encryptionProvider);
expirationsField = new IsolatedStorageCacheItemField(storage, "Exp", itemDirectoryRoot, encryptionProvider);
lastAccessedField = new IsolatedStorageCacheItemField(storage, "LA", itemDirectoryRoot, encryptionProvider);
}
/// <summary>
/// Initializes a new instance of the <see cref="IsolatedStorageBackingStore"/> class given the configuration data
/// </summary>
/// <param name="configurationView">An <see cref="CachingConfigurationView"></see> object</param>
public override void Initialize(ConfigurationView configurationView)
{
ArgumentValidation.CheckForNullReference(configurationView, "configurationView");
ArgumentValidation.CheckExpectedType(configurationView, typeof (CachingConfigurationView));
CachingConfigurationView cachingConfigurationView = (CachingConfigurationView) configurationView;
IsolatedStorageCacheStorageData isoStoreConfigurationData = (IsolatedStorageCacheStorageData) cachingConfigurationView.GetCacheStorageDataForCacheManager(CurrentCacheManager);
if (isoStoreConfigurationData.PartitionName == null)
{
throw new ConfigurationException(SR.IsolatedStoreAreaNameNullException(isoStoreConfigurationData.Name));
}
if (isoStoreConfigurationData.PartitionName.Length == 0)
{
throw new ConfigurationException(SR.IsolatedStoreAreaNameEmptyException(isoStoreConfigurationData.Name));
}
this.storageAreaName = isoStoreConfigurationData.PartitionName;
if (isoStoreConfigurationData.StorageEncryption != null)
{
StorageEncryptionFactory encryptionFactory = new StorageEncryptionFactory(cachingConfigurationView.ConfigurationContext);
this.encryptionProvider = encryptionFactory.CreateSymmetricProvider(CurrentCacheManager);
}
Initialize();
}
public Stream OpenCryptoWrite(IStorageEncryptionProvider encryptionProvider, byte[] iv)
{
throw new NotImplementedException();
}
public Stream OpenCryptoRead(IStorageEncryptionProvider encryptionProvider, byte[] iv)
{
return(encryptionProvider.Decrypt(_bucket.OpenDownloadStream(_fileInfo.Id), iv));
}
public Stream OpenCryptoWrite(IStorageEncryptionProvider encryptionProvider, byte[] iv)
{
return(encryptionProvider.Encrypt(new FileStream(_fileInfo.FullName, FileMode.Open, FileAccess.ReadWrite), iv));
}
public Stream OpenCryptoWrite(IStorageEncryptionProvider encryptionProvider, byte[] iv)
{
return(encryptionProvider.Encrypt(_bucket.OpenUploadStream(_fileInfo.Filename), iv));
}
public Stream OpenCryptoRead(IStorageEncryptionProvider encryptionProvider, byte[] iv)
{
return(encryptionProvider.Decrypt(_fileInfo.OpenRead(), iv));
}
/// <summary>
/// Initializes a new instance of the <see cref="DataBackingStore"/> class
/// with the specified configuration information.
/// </summary>
/// <param name="configurationView">A <see cref="CachingConfigurationView"></see> object</param>
/// <exception cref="System.Configuration.ConfigurationException">Reflects any failures to read configuration information</exception>
/// <remarks>Other exceptions thrown depend on the implementation of the underlying database.</remarks>
public override void Initialize(ConfigurationView configurationView)
{
ArgumentValidation.CheckForNullReference(configurationView, "configurationView");
ArgumentValidation.CheckExpectedType(configurationView, typeof (CachingConfigurationView));
CachingConfigurationView cachingConfigurationView = (CachingConfigurationView) configurationView;
DataCacheStorageData dataConfiguration = (DataCacheStorageData) cachingConfigurationView.GetCacheStorageDataForCacheManager(CurrentCacheManager);
partitionName = dataConfiguration.PartitionName;
DatabaseProviderFactory dataFactory = new DatabaseProviderFactory(cachingConfigurationView.ConfigurationContext);
database = dataFactory.CreateDatabase(dataConfiguration.DatabaseInstanceName);
if (dataConfiguration.StorageEncryption != null)
{
StorageEncryptionFactory encryptionFactory = new StorageEncryptionFactory(cachingConfigurationView.ConfigurationContext);
encryptionProvider = encryptionFactory.CreateSymmetricProvider(CurrentCacheManager);
}
}
/// <summary>
/// Instance constructor. Ensures that the storage location in Isolated Storage is prepared
/// for reading and writing. This class stores each individual field of the CacheItem into its own
/// file inside the directory specified by itemDirectoryRoot.
/// </summary>
/// <param name="storage">Isolated Storage area to use. May not be null.</param>
/// <param name="itemDirectoryRoot">Complete path in Isolated Storage where the cache item should be stored. May not be null.</param>
/// <param name="encryptionProvider">Encryption provider</param>
public IsolatedStorageCacheItem(IsolatedStorageFile storage, string itemDirectoryRoot, IStorageEncryptionProvider encryptionProvider)
{
if (storage == null)
{
throw new ArgumentNullException("storage");
}
int retriesLeft = MaxRetries;
while (true)
{
// work around - attempt to write a file in the folder to determine whether delayed io
// needs to be processed
// since only a limited number of retries will be attempted, some extreme cases may
// still fail if file io is deferred long enough.
// while it's still possible that the deferred IO is still pending when the item that failed
// to be added is removed by the cleanup code, thus making the cleanup fail,
// the item should eventually be removed (by the original removal)
try
{
storage.CreateDirectory(itemDirectoryRoot);
// try to write a file
// if there is a pending operation or the folder is gone, this should find the problem
// before writing an actual field is attempted
using (IsolatedStorageFileStream fileStream =
new IsolatedStorageFileStream(itemDirectoryRoot + @"\sanity-check.txt", FileMode.Create, FileAccess.Write, FileShare.None, storage))
{ }
break;
}
catch (UnauthorizedAccessException)
{
// there are probably pending operations on the directory - retry if allowed
if (retriesLeft-- > 0)
{
Thread.Sleep(RetryDelayInMilliseconds);
continue;
}
throw;
}
catch (DirectoryNotFoundException)
{
// a pending deletion on the directory was processed before creating the file
// but after attempting to create it - retry if allowed
if (retriesLeft-- > 0)
{
Thread.Sleep(RetryDelayInMilliseconds);
continue;
}
throw;
}
}
keyField = new IsolatedStorageCacheItemField(storage, "Key", itemDirectoryRoot, encryptionProvider);
valueField = new IsolatedStorageCacheItemField(storage, "Val", itemDirectoryRoot, encryptionProvider);
scavengingPriorityField = new IsolatedStorageCacheItemField(storage, "ScPr", itemDirectoryRoot, encryptionProvider);
refreshActionField = new IsolatedStorageCacheItemField(storage, "RA", itemDirectoryRoot, encryptionProvider);
expirationsField = new IsolatedStorageCacheItemField(storage, "Exp", itemDirectoryRoot, encryptionProvider);
lastAccessedField = new IsolatedStorageCacheItemField(storage, "LA", itemDirectoryRoot, encryptionProvider);
}
public Stream OpenCryptoWrite(IStorageEncryptionProvider encryptionProvider, byte[] iv)
{
return(encryptionProvider.Encrypt(_fileInfo.OpenWrite(), iv));
}
public Stream OpenCryptoRead(IStorageEncryptionProvider encryptionProvider, byte[] iv)
{
return(encryptionProvider.Decrypt(_blob.OpenReadAsync().Result, iv));
}