Rewrite of the authentication and authorization system

doc/api-authentication.markdown

@@ -0,0 +1,66 @@
+API Authentication
+==================
+
+Default method (HTTP Basic)
+---------------------------
+
+The API credentials are available on the settings page.
+
+- API end-point: `https://YOUR_SERVER/jsonrpc.php`
+
+If you want to use the "application api":
+
+- Username: `jsonrpc`
+- Password: API token on the settings page
+
+Otherwise for the "user api", just use the real username/passsword.
+
+The API use the [HTTP Basic Authentication Scheme described in the RFC2617](http://www.ietf.org/rfc/rfc2617.txt).
+If there is an authentication error, you will receive the HTTP status code `401 Not Authorized`.
+
+### Authorized User API procedures
+
+- getMe
+- getMyDashboard
+- getMyActivityStream
+- createMyPrivateProject
+- getMyProjectsList
+- getMyProjects
+- getTimezone
+- getVersion
+- getDefaultTaskColor
+- getDefaultTaskColors
+- getColorList
+- getProjectById
+- getTask
+- getTaskByReference
+- getAllTasks
+- openTask
+- closeTask
+- moveTaskPosition
+- createTask
+- updateTask
+- getBoard
+- getProjectActivity
+- getMyOverdueTasks
+
+Custom HTTP header
+------------------
+
+You can use an alternative HTTP header for the authentication if your server have a very specific configuration.
+
+- The header name can be anything you want, by example `X-API-Auth`.
+- The header value is the `username:password` encoded in Base64.
+
+Configuration:
+
+1. Define your custom header in your `config.php`: `define('API_AUTHENTICATION_HEADER', 'X-API-Auth');`
+2. Encode the credentials in Base64, example with PHP `base64_encode('jsonrpc:19ffd9709d03ce50675c3a43d1c49c1ac207f4bc45f06c5b2701fbdf8929');`
+3. Test with curl:
+
+```bash
+curl \
+-H 'X-API-Auth: anNvbnJwYzoxOWZmZDk3MDlkMDNjZTUwNjc1YzNhNDNkMWM0OWMxYWMyMDdmNGJjNDVmMDZjNWIyNzAxZmJkZjg5Mjk=' \
+-d '{"jsonrpc": "2.0", "method": "getAllProjects", "id": 1}' \
+http://localhost/kanboard/jsonrpc.php
+```