Fleshed out login spec.
This commit is contained in:
Kegan Dougal
parent
7acede1e42
commit
52cfdfd5f1
|
|
@ -201,124 +201,133 @@ Clients must register with a home server in order to use Matrix. After
|
|||
registering, the client will be given an access token which must be used in ALL
|
||||
requests to that home server as a query parameter 'access_token'.
|
||||
|
||||
- TODO Kegan : Make registration like login
|
||||
- TODO Kegan : Make registration like login (just omit the "user" key on the
|
||||
initial request?)
|
||||
- TODO Kegan : Allow alternative forms of login (>1 route)
|
||||
|
||||
If the client has already registered, they need to be able to login to their
|
||||
account. The home server may provide many different ways of logging in, such
|
||||
as user/password auth, login via a social network (OAuth), login by confirming
|
||||
as user/password auth, login via a social network (OAuth2), login by confirming
|
||||
a token sent to their email address, etc. This specification does not define how
|
||||
home servers should authorise their users who want to login to their existing
|
||||
accounts, but instead defines the standard interface which implementations
|
||||
should follow so that ANY client can login to ANY home server.
|
||||
|
||||
The login process breaks down into the following:
|
||||
1. Get login process info.
|
||||
1. Determine the requirements for logging in.
|
||||
2. Submit the login stage credentials.
|
||||
3. Get access token or be told the next stage in the login process and repeat
|
||||
3. Get credentials or be told the next stage in the login process and repeat
|
||||
step 2.
|
||||
|
||||
- What are types?
|
||||
As each home server may have different ways of logging in, the client needs to know how
|
||||
they should login. All distinct login stages MUST have a corresponding ``'type'``.
|
||||
A ``'type'`` is a namespaced string which details the mechanism for logging in.
|
||||
|
||||
Matrix-defined login types
|
||||
--------------------------
|
||||
A client may be able to login via multiple valid login flows, and should choose a single
|
||||
flow when logging in. A flow is a series of login stages. The home server MUST respond
|
||||
with all the valid login flows when requested::
|
||||
|
||||
The client can login via 3 paths: 1a and 1b, 2a and 2b, or 3. The client should
|
||||
select one of these paths.
|
||||
|
||||
[
|
||||
{
|
||||
"type": "<login type1a>",
|
||||
"stages": [ "<login type 1a>", "<login type 1b>" ]
|
||||
},
|
||||
{
|
||||
"type": "<login type2a>",
|
||||
"stages": [ "<login type 2a>", "<login type 2b>" ]
|
||||
},
|
||||
{
|
||||
"type": "<login type3>"
|
||||
}
|
||||
]
|
||||
|
||||
After the login is completed, the client's fully-qualified user ID and a new access
|
||||
token MUST be returned::
|
||||
|
||||
{
|
||||
"user_id": "@user:matrix.org",
|
||||
"access_token": "abcdef0123456789"
|
||||
}
|
||||
|
||||
The ``user_id`` key is particularly useful if the home server wishes to support
|
||||
localpart entry of usernames (e.g. "user" rather than "@user:matrix.org"), as the
|
||||
client may not be able to determine its ``user_id`` in this case.
|
||||
|
||||
If a login has multiple requests, the home server may wish to create a session. If
|
||||
a home server responds with a 'session' key to a request, clients MUST submit it in
|
||||
subsequent requests until the login is completed::
|
||||
|
||||
{
|
||||
"session": "<session id>"
|
||||
}
|
||||
|
||||
This specification defines the following login types:
|
||||
- m.login.password
|
||||
- m.login.oauth2
|
||||
- m.login.email.code
|
||||
- m.login.email.url
|
||||
|
||||
|
||||
Password-based
|
||||
--------------
|
||||
Type: "m.login.password"
|
||||
LoginSubmission::
|
||||
Type:
|
||||
"m.login.password"
|
||||
Description:
|
||||
Login is supported via a username and password.
|
||||
|
||||
To respond to this type, reply with::
|
||||
|
||||
{
|
||||
"type": "m.login.password",
|
||||
"user": <user_id>,
|
||||
"password": <password>
|
||||
"user": "<user_id or user localpart>",
|
||||
"password": "<password>"
|
||||
}
|
||||
|
||||
Example:
|
||||
Assume you are @bob:matrix.org and you wish to login on another mobile device.
|
||||
First, you GET /login which returns::
|
||||
|
||||
{
|
||||
"type": "m.login.password"
|
||||
}
|
||||
|
||||
Your client knows how to handle this, so your client prompts the user to enter
|
||||
their username and password. This is then submitted::
|
||||
|
||||
{
|
||||
"type": "m.login.password",
|
||||
"user": "@bob:matrix.org",
|
||||
"password": "monkey"
|
||||
}
|
||||
|
||||
The server checks this, finds it is valid, and returns::
|
||||
|
||||
{
|
||||
"access_token": "abcdef0123456789"
|
||||
}
|
||||
|
||||
The server may optionally return "user_id" to confirm or change the user's ID.
|
||||
This is particularly useful if the home server wishes to support localpart entry
|
||||
of usernames (e.g. "bob" rather than "@bob:matrix.org").
|
||||
The home server MUST respond with either new credentials, the next stage of the login
|
||||
process, or a standard error response.
|
||||
|
||||
OAuth2-based
|
||||
------------
|
||||
Type: "m.login.oauth2"
|
||||
This is a multi-stage login.
|
||||
Type:
|
||||
"m.login.oauth2"
|
||||
Description:
|
||||
Login is supported via OAuth2 URLs. This login consists of multiple requests.
|
||||
|
||||
LoginSubmission::
|
||||
To respond to this type, reply with::
|
||||
|
||||
{
|
||||
"type": "m.login.oauth2",
|
||||
"user": <user_id>
|
||||
"user": "<user_id or user localpart>"
|
||||
}
|
||||
|
||||
Returns::
|
||||
The server MUST respond with::
|
||||
|
||||
{
|
||||
"uri": <Authorization Request uri OR service selection uri>
|
||||
"uri": <Authorization Request URI OR service selection URI>
|
||||
}
|
||||
|
||||
The home server acts as a 'confidential' Client for the purposes of OAuth2.
|
||||
|
||||
If the uri is a "sevice selection uri", it is a simple page which prompts the
|
||||
user to choose which service to authorize with. On selection of a service, they
|
||||
link through to Authorization Request URIs. If there is only 1 service which the
|
||||
The home server acts as a 'confidential' client for the purposes of OAuth2.
|
||||
If the uri is a ``sevice selection URI``, it MUST point to a webpage which prompts the
|
||||
user to choose which service to authorize with. On selection of a service, this
|
||||
MUST link through to an ``Authorization Request URI``. If there is only 1 service which the
|
||||
home server accepts when logging in, this indirection can be skipped and the
|
||||
"uri" key can be the Authorization Request URI.
|
||||
"uri" key can be the ``Authorization Request URI``.
|
||||
|
||||
The client visits the Authorization Request URI, which then shows the OAuth2
|
||||
Allow/Deny prompt. Hitting 'Allow' returns the redirect URI with the auth code.
|
||||
Home servers can choose any path for the redirect URI. The client should visit
|
||||
the redirect URI, which will then finish the OAuth2 login process, granting the
|
||||
The client then visits the ``Authorization Request URI``, which then shows the OAuth2
|
||||
Allow/Deny prompt. Hitting 'Allow' returns the ``redirect URI`` with the auth code.
|
||||
Home servers can choose any path for the ``redirect URI``. The client should visit
|
||||
the ``redirect URI``, which will then finish the OAuth2 login process, granting the
|
||||
home server an access token for the chosen service. When the home server gets
|
||||
this access token, it knows that the cilent has authed with the 3rd party, and
|
||||
so can return a LoginResult.
|
||||
this access token, it verifies that the cilent has authorised with the 3rd party, and
|
||||
can now complete the login. The OAuth2 ``redirect URI`` (with auth code) MUST respond
|
||||
with either new credentials, the next stage of the login process, or a standard error
|
||||
response.
|
||||
|
||||
The OAuth redirect URI (with auth code) MUST return a LoginResult.
|
||||
|
||||
Example:
|
||||
Assume you are @bob:matrix.org and you wish to login on another mobile device.
|
||||
First, you GET /login which returns::
|
||||
|
||||
{
|
||||
"type": "m.login.oauth2"
|
||||
}
|
||||
|
||||
Your client knows how to handle this, so your client prompts the user to enter
|
||||
their username. This is then submitted::
|
||||
|
||||
{
|
||||
"type": "m.login.oauth2",
|
||||
"user": "@bob:matrix.org"
|
||||
}
|
||||
|
||||
The server only accepts auth from Google, so returns the Authorization Request
|
||||
URI for Google::
|
||||
For example, if a home server accepts OAuth2 from Google, it would return the
|
||||
Authorization Request URI for Google::
|
||||
|
||||
{
|
||||
"uri": "https://accounts.google.com/o/oauth2/auth?response_type=code&
|
||||
|
|
@ -329,145 +338,142 @@ The client then visits this URI and authorizes the home server. The client then
|
|||
visits the REDIRECT_URI with the auth code= query parameter which returns::
|
||||
|
||||
{
|
||||
"user_id": "@user:matrix.org",
|
||||
"access_token": "0123456789abcdef"
|
||||
}
|
||||
|
||||
Email-based (code)
|
||||
------------------
|
||||
Type: "m.login.email.code"
|
||||
This is a multi-stage login.
|
||||
Type:
|
||||
"m.login.email.code"
|
||||
Description:
|
||||
Login is supported by typing in a code which is sent in an email. This login
|
||||
consists of multiple requests.
|
||||
|
||||
First LoginSubmission::
|
||||
To respond to this type, reply with::
|
||||
|
||||
{
|
||||
"type": "m.login.email.code",
|
||||
"user": <user_id>
|
||||
"email": <email address>
|
||||
"user": "<user_id or user localpart>",
|
||||
"email": "<email address>"
|
||||
}
|
||||
|
||||
Returns::
|
||||
|
||||
{
|
||||
"type": m.login.email.code
|
||||
"session": <session id>
|
||||
}
|
||||
|
||||
The email contains a code which must be sent in the next LoginSubmission::
|
||||
After validating the email address, the home server MUST send an email containing
|
||||
an authentication code and return::
|
||||
|
||||
{
|
||||
"type": "m.login.email.code",
|
||||
"session": <session id>,
|
||||
"code": <code in email sent>
|
||||
"session": "<session id>"
|
||||
}
|
||||
|
||||
Returns::
|
||||
The second request in this login stage involves sending this authentication code::
|
||||
|
||||
{
|
||||
"access_token": <access token>
|
||||
"type": "m.login.email.code",
|
||||
"session": "<session id>",
|
||||
"code": "<code in email sent>"
|
||||
}
|
||||
|
||||
The home server MUST respond to this with either new credentials, the next stage of
|
||||
the login process, or a standard error response.
|
||||
|
||||
Email-based (url)
|
||||
-----------------
|
||||
Type: "m.login.email.url"
|
||||
This is a multi-stage login.
|
||||
Type:
|
||||
"m.login.email.url"
|
||||
Description:
|
||||
Login is supported by clicking on a URL in an email. This login consists of
|
||||
multiple requests.
|
||||
|
||||
First LoginSubmission::
|
||||
To respond to this type, reply with::
|
||||
|
||||
{
|
||||
"type": "m.login.email.url",
|
||||
"user": <user_id>
|
||||
"email": <email address>
|
||||
"user": "<user_id or user localpart>",
|
||||
"email": "<email address>"
|
||||
}
|
||||
|
||||
Returns::
|
||||
After validating the email address, the home server MUST send an email containing
|
||||
an authentication URL and return::
|
||||
|
||||
{
|
||||
"session": <session id>
|
||||
"type": "m.login.email.url",
|
||||
"session": "<session id>"
|
||||
}
|
||||
|
||||
The email contains a URL which must be clicked. After it has been clicked, the
|
||||
client should perform a request::
|
||||
|
||||
{
|
||||
"type": "m.login.email.code",
|
||||
"session": <session id>
|
||||
}
|
||||
|
||||
Returns::
|
||||
|
||||
{
|
||||
"access_token": <access token>
|
||||
}
|
||||
|
||||
Example:
|
||||
Assume you are @bob:matrix.org and you wish to login on another mobile device.
|
||||
First, you GET /login which returns::
|
||||
|
||||
{
|
||||
"type": "m.login.email.url"
|
||||
}
|
||||
|
||||
Your client knows how to handle this, so your client prompts the user to enter
|
||||
their email address. This is then submitted::
|
||||
client should perform another request::
|
||||
|
||||
{
|
||||
"type": "m.login.email.url",
|
||||
"user": "@bob:matrix.org",
|
||||
"email": "bob@mydomain.com"
|
||||
"session": "<session id>"
|
||||
}
|
||||
|
||||
The server confirms that bob@mydomain.com is linked to @bob:matrix.org, then
|
||||
sends an email to this address and returns::
|
||||
The home server MUST respond to this with either new credentials, the next stage of
|
||||
the login process, or a standard error response.
|
||||
|
||||
A common client implementation will be to periodically poll until the link is clicked.
|
||||
If the link has not been visited yet, a standard error response with an errcode of
|
||||
``M_LOGIN_EMAIL_URL_NOT_YET`` should be returned.
|
||||
|
||||
|
||||
N-Factor Authentication
|
||||
-----------------------
|
||||
Multiple login stages can be combined to create N-factor authentication during login.
|
||||
|
||||
This can be achieved by responding with the ``'next'`` login type on completion of a
|
||||
previous login stage::
|
||||
|
||||
{
|
||||
"session": "ewuigf7462"
|
||||
"next": "<next login type>"
|
||||
}
|
||||
|
||||
The client then starts polling the server with the following::
|
||||
If a home server implements N-factor authentication, it MUST respond with all
|
||||
``'stages'`` when initially queried for their login requirements::
|
||||
|
||||
{
|
||||
"type": "m.login.email.url",
|
||||
"session": "ewuigf7462"
|
||||
"type": "<1st login type>",
|
||||
"stages": [ <1st login type>, <2nd login type>, ... , <Nth login type> ]
|
||||
}
|
||||
|
||||
(Alternatively, the server could send the device a push notification when the
|
||||
email has been validated). The email arrives and it contains a URL to click on.
|
||||
The user clicks on the which completes the login process with the server. The
|
||||
next time the client polls, it returns::
|
||||
This can be represented conceptually as::
|
||||
|
||||
{
|
||||
"access_token": "abcdef0123456789"
|
||||
}
|
||||
|
||||
N-Factor auth
|
||||
-------------
|
||||
Multiple login stages can be combined with the "next" key in the LoginResult.
|
||||
|
||||
Example:
|
||||
A server demands an email.code then password auth before logging in. First, the
|
||||
client performs a GET /login which returns::
|
||||
|
||||
{
|
||||
"type": "m.login.email.code",
|
||||
"stages": ["m.login.email.code", "m.login.password"]
|
||||
}
|
||||
|
||||
The client performs the email login (See "Email-based (code)"), but instead of
|
||||
returning an access_token, it returns::
|
||||
|
||||
{
|
||||
"next": "m.login.password"
|
||||
}
|
||||
|
||||
The client then presents a user/password screen and the login continues until
|
||||
this is complete (See "Password-based"), which then returns the "access_token".
|
||||
_______________________
|
||||
| Login Stage 1 |
|
||||
| type: "<login type1>" |
|
||||
| ___________________ |
|
||||
| |_Request_1_________| | <-- Returns "session" key which is used throughout.
|
||||
| ___________________ |
|
||||
| |_Request_2_________| | <-- Returns a "next" value of "login type2"
|
||||
|_______________________|
|
||||
|
|
||||
|
|
||||
_________V_____________
|
||||
| Login Stage 2 |
|
||||
| type: "<login type2>" |
|
||||
| ___________________ |
|
||||
| |_Request_1_________| |
|
||||
| ___________________ |
|
||||
| |_Request_2_________| |
|
||||
| ___________________ |
|
||||
| |_Request_3_________| | <-- Returns a "next" value of "login type3"
|
||||
|_______________________|
|
||||
|
|
||||
|
|
||||
_________V_____________
|
||||
| Login Stage 3 |
|
||||
| type: "<login type3>" |
|
||||
| ___________________ |
|
||||
| |_Request_1_________| | <-- Returns user credentials
|
||||
|_______________________|
|
||||
|
||||
Fallback
|
||||
--------
|
||||
Clients cannot be expected to be able to know how to process every single
|
||||
login type. If a client determines it does not know how to handle a given
|
||||
login type, it should request a login fallback page::
|
||||
|
||||
If the client does NOT know how to handle the given type, they should::
|
||||
|
||||
GET /login/fallback
|
||||
GET matrix/client/api/v1/login/fallback
|
||||
|
||||
This MUST return an HTML page which can perform the entire login process.
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue