protected virtual void Dispose(bool disposing)
{
if (_extraAuthDbContextOptions != null && _context != null)
{
if (disposing)
{
_context.Dispose();
}
// TODO: free unmanaged resources (unmanaged objects) and override a finalizer below.
// TODO: set large fields to null.
_context = null;
}
}
/// <summary>
/// This will set up the user's feature permissions if either of the following states are found
/// - The current claims doesn't have the PackedPermissionClaimType. This happens when someone logs in.
/// - If the LastPermissionsUpdatedClaimType is missing (null) or is a lower number that is stored in the TimeStore cache.
/// It will also add a HierarchicalKeyClaimName claim with the user's data key if not present.
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public async Task ValidateAsync(CookieValidatePrincipalContext context)
{
var extraContext = new ExtraAuthorizeDbContext(_extraAuthContextOptions, _authChanges);
//now we set up the lazy values - I used Lazy for performance reasons, as 99.9% of the time the lazy parts aren't needed
// ReSharper disable once AccessToDisposedClosure
var rtoPLazy = new Lazy <CalcAllowedPermissions>(() => new CalcAllowedPermissions(extraContext));
// ReSharper disable once AccessToDisposedClosure
var dataKeyLazy = new Lazy <CalcDataKey>(() => new CalcDataKey(extraContext));
var originalClaims = context.Principal.Claims.ToList();
var impHandler = new ImpersonationHandler(context.HttpContext, _protectionProvider, originalClaims);
var newClaims = new List <Claim>();
if (originalClaims.All(x => x.Type != PermissionConstants.PackedPermissionClaimType) ||
impHandler.ImpersonationChange ||
_authChanges.IsOutOfDateOrMissing(AuthChangesConsts.FeatureCacheKey,
originalClaims.SingleOrDefault(x => x.Type == PermissionConstants.LastPermissionsUpdatedClaimType)?.Value,
extraContext))
{
//Handle the feature permissions
var userId = impHandler.GetUserIdForWorkingOutPermissions();
newClaims.AddRange(await BuildFeatureClaimsAsync(userId, rtoPLazy.Value));
}
if (originalClaims.All(x => x.Type != DataAuthConstants.HierarchicalKeyClaimName) ||
impHandler.ImpersonationChange)
{
var userId = impHandler.GetUserIdForWorkingDataKey();
newClaims.AddRange(BuildDataClaims(userId, dataKeyLazy.Value));
}
if (newClaims.Any())
{
//Something has changed so we replace the current ClaimsPrincipal with a new one
newClaims.AddRange(RemoveUpdatedClaimsFromOriginalClaims(originalClaims, newClaims)); //Copy over unchanged claims
impHandler.AddOrRemoveImpersonationClaim(newClaims);
//Build a new ClaimsPrincipal and use it to replace the current ClaimsPrincipal
var identity = new ClaimsIdentity(newClaims, "Cookie");
var newPrincipal = new ClaimsPrincipal(identity);
context.ReplacePrincipal(newPrincipal);
//THIS IS IMPORTANT: This updates the cookie, otherwise this calc will be done every HTTP request
context.ShouldRenew = true;
}
extraContext.Dispose(); //be tidy and dispose the context.
}
