public static string GetAccessToken(string resource) {
// get user ID in security cookie
var signedInUserID = ClaimsPrincipal.Current.FindFirst(ClaimTypes.NameIdentifier).Value;
// get token cache for signed in user
ApplicationDbContext db = new ApplicationDbContext();
ADALTokenCache userTokenCache = new ADALTokenCache(signedInUserID);
AuthenticationContext authContext = new AuthenticationContext(Authority, userTokenCache);
// Get credentials for user
var clientCredential = new ClientCredential(clientId, clientSecret);
// Create user identifier object using User ID for Azure Active Directory account
string objectIdentifierID = "http://schemas.microsoft.com/identity/claims/objectidentifier";
var userObjectId = ClaimsPrincipal.Current.FindFirst(objectIdentifierID).Value;
var userIdentifier = new UserIdentifier(userObjectId, UserIdentifierType.UniqueId);
// call to ADAL to get access token from cache of across network
var authResult = authContext.AcquireTokenSilent(resource, clientCredential, userIdentifier);
// obtain access token
return authResult.AccessToken;
}
public static ADALTokenCache GetTokenCache() {
// get ClaimsPrincipal for current user
ClaimsPrincipal currentUserClaims = ClaimsPrincipal.Current;
string signedInUserID = currentUserClaims.FindFirst(ClaimTypes.NameIdentifier).Value;
string userObjectID = currentUserClaims.FindFirst("http://schemas.microsoft.com/identity/claims/objectidentifier").Value;
ApplicationDbContext db = new ApplicationDbContext();
ADALTokenCache userTokenCache = new ADALTokenCache(signedInUserID);
return userTokenCache;
}
