(2) OAuth 2.0 Client Registration
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OAuth 2.0 defines client registration procedures for applications to access protected resources. Clients can register directly with the server or through self-issued or third-party assertions. Registration provides the client type (confidential or public), redirection URIs, and other info. Confidential clients like web apps store credentials securely, while public clients like native apps don't. Client identifiers uniquely identify clients without authenticating them. Confidential clients authenticate using established methods like passwords, while public clients don't authenticate.
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- **Efficient Use of Bandwidth**: TDM all
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(2) OAuth 2.0 Client Registration
- 2. Initialization Direct interaction between client and server is not required Other means of registration: Self-issued assertion Third-party assertion Client discovery through a trusted channel
- 3. Provided info during registration 1. Client Type 2. Client redirection URIs 3. Extra info
- 4. Client Types Confidential clients. (E.g.: client implemented on a secure server) Public clients. (E.g.: clients executing on a device used by resource owner, native apps or apps based on web browsers)
- 5. Client Profiles WEB APPLICATIONS – confidential because it runs on a web server and client credentials are stored in a server. USER-AGENT-BASED APPLICATIONS – public because the client code is downloaded to a user-agent (e.g. web browser) and runs on the device. NATIVE APPLICATIONS – public because it is executed on resource owner’s device, thus protocol data is accessible by other servers and/or applications it interacts with.
- 6. Client Identifiers It is a unique string for identification. Public Size is undefined by the spec (left to the implementer’s decision) Cannot be used for authentication of the client
- 7. Client Authentication CONFIDENTIAL CLIENTS Established authentication method. Typically issued client credentials (e.g. password) Not more than one authentication method
- 8. Client Password HTTP Basic can be used Username: Encoded Client ID Password: Encoded Client Password Authorization Server may support client credentials as response body (NOT RECOMMENDED) (ONLY OVER TLS): client_id (REQUIRED) (issued during registration) client_secret (REQUIRED)