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Claims-based identity is a common way for applications to acquire the identity information they need about users inside their organization, in other organizations, and on the Internet. [1] It also provides a consistent approach for applications running on-premises or in the cloud.
Claims-based identity is a means of authenticating an end user, application or device to another system in a way that abstracts the entity's specific information while providing data that authorizes it for appropriate and relevant interactions.
- Overview
- Adding claims checks
- Multiple Policy Evaluation
When an identity is created it may be assigned one or more claims issued by a trusted party. A claim is a name value pair that represents what the subject is, not what the subject can do. For example, you may have a driver's license, issued by a local driving license authority. Your driver's license has your date of birth on it. In this case the claim name would be DateOfBirth, the claim value would be your date of birth, for example 8th June 1970 and the issuer would be the driving license authority. Claims-based authorization, at its simplest, checks the value of a claim and allows access to a resource based upon that value. For example if you want access to a night club the authorization process might be:
The door security officer would evaluate the value of your date of birth claim and whether they trust the issuer (the driving license authority) before granting you access.
Claim-based authorization checks:
•Are declarative.
•Are applied to Razor Pages, controllers, or actions within a controller.
•Can not be applied at the Razor Page handler level, they must be applied to the Page.
Claims in code specify claims which the current user must possess, and optionally the value the claim must hold to access the requested resource. Claims requirements are policy based; the developer must build and register a policy expressing the claims requirements.
The simplest type of claim policy looks for the presence of a claim and doesn't check the value.
If multiple policies are applied at the controller and action levels, all policies must pass before access is granted:
In the preceding example any identity which fulfills the EmployeeOnly policy can access the Payslip action as that policy is enforced on the controller. However, in order to call the UpdateSalary action the identity must fulfill both the EmployeeOnly policy and the HumanResources policy.
If you want more complicated policies, such as taking a date of birth claim, calculating an age from it, and then checking that the age is 21 or older, then you need to write custom policy handlers.
In the following sample, both page handler methods must fulfill both the EmployeeOnly policy and the HumanResources policy:
When an identity is created it may be assigned one or more claims issued by a trusted party. A claim is a name value pair that represents what the subject is, not what the subject can do. For example, you may have a driver's license, issued by a local driving license authority. Your driver's license has your date of birth on it. In this case the claim name would be DateOfBirth, the claim value would be your date of birth, for example 8th June 1970 and the issuer would be the driving license authority. Claims-based authorization, at its simplest, checks the value of a claim and allows access to a resource based upon that value. For example if you want access to a night club the authorization process might be:
The door security officer would evaluate the value of your date of birth claim and whether they trust the issuer (the driving license authority) before granting you access.
Feb 8, 2014 · A claims-based identity is the set of claims. A claim is a statement that an entity (a user or another application) makes about itself, it's just a claim. For example a claim list can have the user’s name, user’s e-mail, user’s age, user's authorization for an action.
Feb 13, 2024 · In its simplest form, claims are simply statements (for example, name, identity, group), made about users, that are used primarily for authorizing access to claims-based applications located anywhere on the Internet. Each statement corresponds to a value that is stored in the claim.
The ClaimsIdentity class is a concrete implementation of a claims-based identity; that is, an identity described by a collection of claims. A claim is a statement about an entity made by an issuer that describes a property, right, or some other quality of that entity.
Oct 14, 2019 · Claims are the foundation behind claims-based authentication (who would have guessed). A claim is simply a piece of information about a subject. A claim does not dictate what a subject can, or cannot do.
