How is basic auth encoded?

HTTP basic authentication is a simple challenge and response mechanism with which a server can request authentication information (a user ID and password) from a client. The client passes the authentication information to the server in an Authorization header. The authentication information is in base-64 encoding.

How can I get basic auth in PHP?

Check what you have in $_SERVER (print_r($_SERVER)), sometimes $_SERVER[‘PHP_AUTH_USER’] is not available. Show activity on this post. At my clients hoster $_SERVER[‘PHP_AUTH_USER’] and $_SERVER[“HTTP_AUTHORIZATION”] were empty but $_SERVER[“REMOTE_USER”] was set!

How do you send Auth in curl?

To send basic auth credentials with Curl, use the “-u login: password” command-line option. Curl automatically converts the login: password pair into a Base64-encoded string and adds the “Authorization: Basic [token]” header to the request.

What is realm PHP?

An authentication realm is a grouping of authentication resources, including: An authentication server, which verifies a user’s identity. The system forwards credentials submitted on a sign-in page to an authentication server.

Does Basic Auth use Base64?

In basic HTTP authentication, a request contains a header field in the form of Authorization: Basic , where credentials is the Base64 encoding of ID and password joined by a single colon : . It was originally implemented by Ari Luotonen at CERN in 1993 and defined in the HTTP 1.0 specification in 1996.

What is $_ SERVER [‘ Php_auth_user ‘]?

Once the user has filled in a username and a password, the URL containing the PHP script will be called again with the predefined variables PHP_AUTH_USER , PHP_AUTH_PW , and AUTH_TYPE set to the user name, password and authentication type respectively. These predefined variables are found in the $_SERVER array.

What is basic auth realm?

The ‘Basic’ Authentication Scheme. The Basic authentication scheme is based on the model that the client needs to authenticate itself with a user-id and a password for each protection space (“realm”). The realm value is a free-form string that can only be compared for equality with other realms on that server.

What is base64 encoding used for?

Base64 encoding schemes are commonly used when there is a need to encode binary data that needs to be stored and transferred over media that are designed to deal with ASCII. This is to ensure that the data remain intact without modification during transport.

Why is basic auth base64 encoded?

The Base64 encoding, most importantly, ensures that the user:pass characters are all part of the ASCII character set and ASCII encoded. A user:pass in HTTP Basic auth is part of the Authorization header-field value. HTTP header values are ASCII (or Extended ASCII) encoded/decoded.

How do you embed credentials in URL?

It is indeed not possible to pass the username and password via query parameters in standard HTTP auth. Instead, you use a special URL format, like this: http://username:[email protected]/ — this sends the credentials in the standard HTTP “Authorization” header.