Basic authentication how to add in asp net core

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okay, let's dive deep into basic authentication in asp.net core. this will be a comprehensive tutorial covering the fundamentals, implementation, and considerations.

**what is basic authentication?**

basic authentication is a simple authentication scheme defined in rfc 7617. it works by sending the username and password as a base64-encoded string in the `authorization` header of an http request. this header is sent to the server with every request.

**how it works:**

1. **client request:** a client (browser, application, etc.) wants to access a protected resource on the server.
2. **server challenge (if needed):** if the client hasn't yet sent any authentication information, the server responds with a `401 unauthorized` status code and a `www-authenticate: basic realm="yourrealm"` header. the "realm" is a string that the browser or client may display to the user, describing the resource they're trying to access.
3. **client authentication:** the client prompts the user for their username and password. the client then concatenates the username and password in the format `username:password`, encodes the result in base64, and sends it in the `authorization` header like this: `authorization: basic base64encodedstring`.
4. **server verification:** the server receives the request, decodes the base64 string, extracts the username and password, and verifies them against a user store (e.g., database, configuration file).
5. **authorization:** if the username and password are valid, the server grants access to the requested resource and sends the requested data. otherwise, the server sends another `401 unauthorized` response (or other appropriate error).

**important considerations (security):**

* **never use over http:** basic authentication **must** be used over https (ssl/tls). the base64 encoding is easily decoded, so transmitting credentials in plain text over an insecure connection is a major security risk. anyone can intercept and steal the username and ...

#BasicAuthentication #ASPNETCore #numpy
Basic authentication
ASP.NET Core
add authentication
middleware configuration
secure API
user credentials
HTTP headers
authentication schemes
authentication filters
custom authentication
authorization
token management
app settings
identity management
security best practices

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