/// <summary>
/// Gets the current set of accounts in the cache by creating a new public client, and
/// deserializing the cache into a temporary object.
/// </summary>
private static async Task <HashSet <string> > GetAccountIdentifiersAsync(StorageCreationProperties storageCreationProperties)
{
var accountIdentifiers = new HashSet <string>();
if (File.Exists(storageCreationProperties.CacheFilePath))
{
var pca = PublicClientApplicationBuilder.Create(storageCreationProperties.ClientId).Build();
pca.UserTokenCache.SetBeforeAccess((args) =>
{
var tempCache = new MsalCacheStorage(storageCreationProperties, s_staticLogger.Value);
// We're using ReadData here so that decryption is gets handled within the store.
args.TokenCache.DeserializeMsalV3(tempCache.ReadData());
});
var accounts = await pca.GetAccountsAsync().ConfigureAwait(false);
foreach (var account in accounts)
{
accountIdentifiers.Add(account.HomeAccountId.Identifier);
}
}
return(accountIdentifiers);
}
/// <summary>
/// An internal constructor allowing unit tests to data explicitly rather than initializing here.
/// </summary>
/// <param name="userTokenCache">The token cache to synchronize with the backing store</param>
/// <param name="store">The backing store to use.</param>
/// <param name="logger">Passing null uses the default logger</param>
internal MsalCacheHelper(ITokenCache userTokenCache, MsalCacheStorage store, TraceSource logger = null)
{
_logger = logger == null ? s_staticLogger.Value : new TraceSourceLogger(logger);
CacheStore = store;
_storageCreationProperties = store.StorageCreationProperties;
RegisterCache(userTokenCache);
}
/// <summary>
/// Creates a new instance of this class.
/// </summary>
/// <param name="storageCreationProperties">Properties to use when creating storage on disk.</param>
/// <param name="logger">Passing null uses a default logger</param>
/// <param name="knownAccountIds">The set of known accounts</param>
/// <param name="cacheWatcher">Watcher for the cache file, to enable sending updated events</param>
private MsalCacheHelper(StorageCreationProperties storageCreationProperties, TraceSource logger, HashSet <string> knownAccountIds, FileSystemWatcher cacheWatcher)
{
_logger = logger ?? s_staticLogger.Value;
_storageCreationProperties = storageCreationProperties;
_store = new MsalCacheStorage(_storageCreationProperties, _logger);
_knownAccountIds = knownAccountIds;
_cacheWatcher = cacheWatcher;
_cacheWatcher.Changed += OnCacheFileChangedAsync;
_cacheWatcher.Deleted += OnCacheFileChangedAsync;
}
/// <summary>
/// Gets the current set of accounts in the cache by creating a new public client, and
/// deserializing the cache into a temporary object.
/// </summary>
private static async Task <HashSet <string> > GetAccountIdentifiersAsync(
StorageCreationProperties storageCreationProperties,
TraceSourceLogger logger)
{
var accountIdentifiers = new HashSet <string>();
if (File.Exists(storageCreationProperties.CacheFilePath))
{
var pca = PublicClientApplicationBuilder.Create(storageCreationProperties.ClientId).Build();
pca.UserTokenCache.SetBeforeAccess((args) =>
{
MsalCacheStorage tempCache = null;
try
{
tempCache = MsalCacheStorage.Create(storageCreationProperties, s_staticLogger.Value.Source);
// We're using ReadData here so that decryption is handled within the store.
var data = tempCache.ReadData();
args.TokenCache.DeserializeMsalV3(data);
}
catch (Exception e)
{
logger.LogError("An error occured while reading the token cache: " + e);
logger.LogError("Deleting the token cache as it might be corrupt.");
tempCache.Clear();
}
});
var accounts = await pca.GetAccountsAsync().ConfigureAwait(false);
foreach (var account in accounts)
{
accountIdentifiers.Add(account.HomeAccountId.Identifier);
}
}
return(accountIdentifiers);
}
/// <summary>
/// Creates a new instance of this class.
/// </summary>
/// <param name="storageCreationProperties">Properties to use when creating storage on disk.</param>
/// <param name="logger">Passing null uses the default logger</param>
public MsalCacheHelper(StorageCreationProperties storageCreationProperties, TraceSource logger = null)
{
_logger = logger ?? s_staticLogger.Value;
_storageCreationProperties = storageCreationProperties;
_store = new MsalCacheStorage(_storageCreationProperties, logger);
}
