public async Task <AuthenticationResult> ExecuteAsync(CancellationToken cancellationToken)
{
var logger = AuthenticationRequestParameters.RequestContext.Logger;
MsalAccessTokenCacheItem cachedAccessTokenItem = null;
CacheRefreshReason cacheInfoTelemetry = CacheRefreshReason.NotApplicable;
ThrowIfNoScopesOnB2C();
ThrowIfCurrentBrokerAccount();
AuthenticationResult authResult = null;
if (!_silentParameters.ForceRefresh && string.IsNullOrEmpty(AuthenticationRequestParameters.Claims))
{
cachedAccessTokenItem = await CacheManager.FindAccessTokenAsync().ConfigureAwait(false);
if (cachedAccessTokenItem != null)
{
logger.Info("Returning access token found in cache. RefreshOn exists ? "
+ cachedAccessTokenItem.RefreshOn.HasValue);
AuthenticationRequestParameters.RequestContext.ApiEvent.IsAccessTokenCacheHit = true;
Metrics.IncrementTotalAccessTokensFromCache();
authResult = await CreateAuthenticationResultAsync(cachedAccessTokenItem).ConfigureAwait(false);
}
else
{
if (AuthenticationRequestParameters.RequestContext.ApiEvent.CacheInfo != CacheRefreshReason.Expired)
{
cacheInfoTelemetry = CacheRefreshReason.NoCachedAccessToken;
}
}
}
else
{
cacheInfoTelemetry = CacheRefreshReason.ForceRefreshOrClaims;
logger.Info("Skipped looking for an Access Token because ForceRefresh or Claims were set. ");
}
if (AuthenticationRequestParameters.RequestContext.ApiEvent.CacheInfo == CacheRefreshReason.NotApplicable)
{
AuthenticationRequestParameters.RequestContext.ApiEvent.CacheInfo = cacheInfoTelemetry;
}
// No AT or AT neesd to be refreshed
try
{
if (cachedAccessTokenItem == null)
{
authResult = await RefreshRtOrFailAsync(cancellationToken).ConfigureAwait(false);
}
else
{
var shouldRefresh = SilentRequestHelper.NeedsRefresh(cachedAccessTokenItem);
// may fire a request to get a new token in the background
if (shouldRefresh)
{
AuthenticationRequestParameters.RequestContext.ApiEvent.CacheInfo = CacheRefreshReason.ProactivelyRefreshed;
SilentRequestHelper.ProcessFetchInBackground(
cachedAccessTokenItem,
() => RefreshRtOrFailAsync(cancellationToken), logger);
}
}
return(authResult);
}
catch (MsalServiceException e)
{
bool isAadUnavailable = e.IsAadUnavailable();
logger.Warning($"Refreshing the RT failed. Is AAD down? {isAadUnavailable}. Is there an AT in the cache that is usable? {cachedAccessTokenItem != null} ");
if (cachedAccessTokenItem != null && isAadUnavailable)
{
logger.Info("Returning existing access token. It is not expired, but should be refreshed. ");
return(await CreateAuthenticationResultAsync(cachedAccessTokenItem).ConfigureAwait(false));
}
logger.Warning("Failed to refresh the RT and cannot use existing AT (expired or missing). ");
throw;
}
}
protected override async Task <AuthenticationResult> ExecuteAsync(CancellationToken cancellationToken)
{
if (AuthenticationRequestParameters.Scope == null || AuthenticationRequestParameters.Scope.Count == 0)
{
throw new MsalClientException(
MsalError.ScopesRequired,
MsalErrorMessage.ScopesRequired);
}
MsalAccessTokenCacheItem cachedAccessTokenItem = null;
var logger = AuthenticationRequestParameters.RequestContext.Logger;
CacheRefreshReason cacheInfoTelemetry = CacheRefreshReason.NotApplicable;
AuthenticationResult authResult = null;
if (AuthenticationRequestParameters.Authority is AadAuthority aadAuthority &&
aadAuthority.IsCommonOrOrganizationsTenant())
{
logger.Error(MsalErrorMessage.ClientCredentialWrongAuthority);
}
if (!_clientParameters.ForceRefresh &&
string.IsNullOrEmpty(AuthenticationRequestParameters.Claims))
{
cachedAccessTokenItem = await CacheManager.FindAccessTokenAsync().ConfigureAwait(false);
if (cachedAccessTokenItem != null)
{
AuthenticationRequestParameters.RequestContext.ApiEvent.IsAccessTokenCacheHit = true;
Metrics.IncrementTotalAccessTokensFromCache();
authResult = new AuthenticationResult(
cachedAccessTokenItem,
null,
AuthenticationRequestParameters.AuthenticationScheme,
AuthenticationRequestParameters.RequestContext.CorrelationId,
TokenSource.Cache,
AuthenticationRequestParameters.RequestContext.ApiEvent,
null);
}
else
{
if (AuthenticationRequestParameters.RequestContext.ApiEvent.CacheInfo != CacheRefreshReason.Expired)
{
cacheInfoTelemetry = CacheRefreshReason.NoCachedAccessToken;
}
}
}
else
{
cacheInfoTelemetry = CacheRefreshReason.ForceRefreshOrClaims;
logger.Info("Skipped looking for an Access Token in the cache because ForceRefresh or Claims were set. ");
}
if (AuthenticationRequestParameters.RequestContext.ApiEvent.CacheInfo == CacheRefreshReason.NotApplicable)
{
AuthenticationRequestParameters.RequestContext.ApiEvent.CacheInfo = cacheInfoTelemetry;
}
// No AT in the cache or AT needs to be refreshed
try
{
if (cachedAccessTokenItem == null)
{
authResult = await FetchNewAccessTokenAsync(cancellationToken).ConfigureAwait(false);
}
else
{
var shouldRefresh = SilentRequestHelper.NeedsRefresh(cachedAccessTokenItem);
// may fire a request to get a new token in the background
if (shouldRefresh)
{
AuthenticationRequestParameters.RequestContext.ApiEvent.CacheInfo = CacheRefreshReason.ProactivelyRefreshed;
SilentRequestHelper.ProcessFetchInBackground(
cachedAccessTokenItem,
() => FetchNewAccessTokenAsync(cancellationToken), logger);
}
}
return(authResult);
}
catch (MsalServiceException e)
{
return(await HandleTokenRefreshErrorAsync(e, cachedAccessTokenItem).ConfigureAwait(false));
}
}
protected override async Task <AuthenticationResult> ExecuteAsync(CancellationToken cancellationToken)
{
if (AuthenticationRequestParameters.Scope == null || AuthenticationRequestParameters.Scope.Count == 0)
{
throw new MsalClientException(
MsalError.ScopesRequired,
MsalErrorMessage.ScopesRequired);
}
await ResolveAuthorityAsync().ConfigureAwait(false);
MsalAccessTokenCacheItem cachedAccessToken = null;
var logger = AuthenticationRequestParameters.RequestContext.Logger;
AuthenticationResult authResult = null;
CacheRefreshReason cacheInfoTelemetry = CacheRefreshReason.NotApplicable;
if (!_onBehalfOfParameters.ForceRefresh && string.IsNullOrEmpty(AuthenticationRequestParameters.Claims))
{
// look for access token in the cache first.
// no access token is found, then it means token does not exist
// or new assertion has been passed.
// Look for a refresh token, if refresh token is found perform refresh token flow.
// If a refresh token is not found, then it means refresh token does not exist or new assertion has been passed.
// Fetch new access token for OBO
using (logger.LogBlockDuration("[OBO Request] Looking in the cache for an access token"))
{
cachedAccessToken = await CacheManager.FindAccessTokenAsync().ConfigureAwait(false);
}
if (cachedAccessToken != null)
{
var cachedIdToken = await CacheManager.GetIdTokenCacheItemAsync(cachedAccessToken).ConfigureAwait(false);
var account = await CacheManager.GetAccountAssociatedWithAccessTokenAsync(cachedAccessToken).ConfigureAwait(false);
logger.Info(
"[OBO Request] Found a valid access token in the cache. ID token also found? " + (cachedIdToken != null));
AuthenticationRequestParameters.RequestContext.ApiEvent.IsAccessTokenCacheHit = true;
Metrics.IncrementTotalAccessTokensFromCache();
authResult = new AuthenticationResult(
cachedAccessToken,
cachedIdToken,
AuthenticationRequestParameters.AuthenticationScheme,
AuthenticationRequestParameters.RequestContext.CorrelationId,
TokenSource.Cache,
AuthenticationRequestParameters.RequestContext.ApiEvent,
account);
}
else
{
if (AuthenticationRequestParameters.RequestContext.ApiEvent.CacheInfo != CacheRefreshReason.Expired)
{
cacheInfoTelemetry = CacheRefreshReason.NoCachedAccessToken;
}
}
}
else
{
logger.Info("[OBO Request] Skipped looking for an Access Token in the cache because ForceRefresh or Claims were set. ");
cacheInfoTelemetry = CacheRefreshReason.ForceRefreshOrClaims;
}
if (AuthenticationRequestParameters.RequestContext.ApiEvent.CacheInfo == CacheRefreshReason.NotApplicable)
{
AuthenticationRequestParameters.RequestContext.ApiEvent.CacheInfo = cacheInfoTelemetry;
}
// No AT in the cache or AT needs to be refreshed
try
{
if (cachedAccessToken == null)
{
authResult = await RefreshRtOrFetchNewAccessTokenAsync(cancellationToken).ConfigureAwait(false);
}
else
{
var shouldRefresh = SilentRequestHelper.NeedsRefresh(cachedAccessToken);
// may fire a request to get a new token in the background
if (shouldRefresh)
{
AuthenticationRequestParameters.RequestContext.ApiEvent.CacheInfo = CacheRefreshReason.ProactivelyRefreshed;
SilentRequestHelper.ProcessFetchInBackground(
cachedAccessToken,
() => RefreshRtOrFetchNewAccessTokenAsync(cancellationToken), logger);
}
}
return(authResult);
}
catch (MsalServiceException e)
{
return(await HandleTokenRefreshErrorAsync(e, cachedAccessToken).ConfigureAwait(false));
}
}