Remove authentication from GN3

Authentication should be handled by the auth server (gn-auth) and thus, this
commit removes code handling user authentication from the GN3 system.

4 files changed, 0 insertions, 460 deletions

diff --git a/gn3/auth/authentication/oauth2/models/__init__.py b/gn3/auth/authentication/oauth2/models/__init__.py
deleted file mode 100644
index e69de29..0000000
--- a/gn3/auth/authentication/oauth2/models/__init__.py
+++ /dev/null
diff --git a/gn3/auth/authentication/oauth2/models/authorization_code.py b/gn3/auth/authentication/oauth2/models/authorization_code.py
deleted file mode 100644
index f282814..0000000
--- a/gn3/auth/authentication/oauth2/models/authorization_code.py
+++ /dev/null
@@ -1,93 +0,0 @@
-"""Model and functions for handling the Authorisation Code"""
-from uuid import UUID
-from datetime import datetime
-from typing import NamedTuple
-
-from pymonad.maybe import Just, Maybe, Nothing
-
-from gn3.auth import db
-
-from .oauth2client import OAuth2Client
-
-from ...users import User, user_by_id
-
-__5_MINUTES__ = 300 # in seconds
-
-class AuthorisationCode(NamedTuple):
-    """
-    The AuthorisationCode model for the auth(entic|oris)ation system.
-    """
-    # Instance variables
-    code_id: UUID
-    code: str
-    client: OAuth2Client
-    redirect_uri: str
-    scope: str
-    nonce: str
-    auth_time: int
-    code_challenge: str
-    code_challenge_method: str
-    user: User
-
-    @property
-    def response_type(self) -> str:
-        """
-        For authorisation code flow, the response_type type MUST always be
-        'code'.
-        """
-        return "code"
-
-    def is_expired(self):
-        """Check whether the code is expired."""
-        return self.auth_time + __5_MINUTES__ < datetime.now().timestamp()
-
-    def get_redirect_uri(self):
-        """Get the redirect URI"""
-        return self.redirect_uri
-
-    def get_scope(self):
-        """Return the assigned scope for this AuthorisationCode."""
-        return self.scope
-
-    def get_nonce(self):
-        """Get the one-time use token."""
-        return self.nonce
-
-def authorisation_code(conn: db.DbConnection ,
-                       code: str,
-                       client: OAuth2Client) -> Maybe[AuthorisationCode]:
-    """
-    Retrieve the authorisation code object that corresponds to `code` and the
-    given OAuth2 client.
-    """
-    with db.cursor(conn) as cursor:
-        query = ("SELECT * FROM authorisation_code "
-                 "WHERE code=:code AND client_id=:client_id")
-        cursor.execute(
-            query, {"code": code, "client_id": str(client.client_id)})
-        result = cursor.fetchone()
-        if result:
-            return Just(AuthorisationCode(
-                UUID(result["code_id"]), result["code"], client,
-                result["redirect_uri"], result["scope"], result["nonce"],
-                int(result["auth_time"]), result["code_challenge"],
-                result["code_challenge_method"],
-                user_by_id(conn, UUID(result["user_id"]))))
-        return Nothing
-
-def save_authorisation_code(conn: db.DbConnection,
-                            auth_code: AuthorisationCode) -> AuthorisationCode:
-    """Persist the `auth_code` into the database."""
-    with db.cursor(conn) as cursor:
-        cursor.execute(
-            "INSERT INTO authorisation_code VALUES("
-            ":code_id, :code, :client_id, :redirect_uri, :scope, :nonce, "
-            ":auth_time, :code_challenge, :code_challenge_method, :user_id"
-            ")",
-            {
-                **auth_code._asdict(),
-                "code_id": str(auth_code.code_id),
-                "client_id": str(auth_code.client.client_id),
-                "user_id": str(auth_code.user.user_id)
-            })
-        return auth_code
diff --git a/gn3/auth/authentication/oauth2/models/oauth2client.py b/gn3/auth/authentication/oauth2/models/oauth2client.py
deleted file mode 100644
index 2a307e3..0000000
--- a/gn3/auth/authentication/oauth2/models/oauth2client.py
+++ /dev/null
@@ -1,234 +0,0 @@
-"""OAuth2 Client model."""
-import json
-import datetime
-from uuid import UUID
-from typing import Sequence, Optional, NamedTuple
-
-from pymonad.maybe import Just, Maybe, Nothing
-
-from gn3.auth import db
-from gn3.auth.authentication.users import User, users, user_by_id, same_password
-
-from gn3.auth.authorisation.errors import NotFoundError
-
-class OAuth2Client(NamedTuple):
-    """
-    Client to the OAuth2 Server.
-
-    This is defined according to the mixin at
-    https://docs.authlib.org/en/latest/specs/rfc6749.html#authlib.oauth2.rfc6749.ClientMixin
-    """
-    client_id: UUID
-    client_secret: str
-    client_id_issued_at: datetime.datetime
-    client_secret_expires_at: datetime.datetime
-    client_metadata: dict
-    user: User
-
-    def check_client_secret(self, client_secret: str) -> bool:
-        """Check whether the `client_secret` matches this client."""
-        return same_password(client_secret, self.client_secret)
-
-    @property
-    def token_endpoint_auth_method(self) -> str:
-        """Return the token endpoint authorisation method."""
-        return self.client_metadata.get("token_endpoint_auth_method", ["none"])
-
-    @property
-    def client_type(self) -> str:
-        """
-        Return the token endpoint authorisation method.
-
-        Acceptable client types:
-        * public: Unable to use registered client secrets, e.g. browsers, apps
-          on mobile devices.
-        * confidential: able to securely authenticate with authorisation server
-          e.g. being able to keep their registered client secret safe.
-        """
-        return self.client_metadata.get("client_type", "public")
-
-    def check_endpoint_auth_method(self, method: str, endpoint: str) -> bool:
-        """
-        Check if the client supports the given method for the given endpoint.
-
-        Acceptable methods:
-        * none: Client is a public client and does not have a client secret
-        * client_secret_post: Client uses the HTTP POST parameters
-        * client_secret_basic: Client uses HTTP Basic
-        """
-        if endpoint == "token":
-            return (method in self.token_endpoint_auth_method
-                    and method == "client_secret_post")
-        if endpoint in ("introspection", "revoke"):
-            return (method in self.token_endpoint_auth_method
-                    and method == "client_secret_basic")
-        return False
-
-    @property
-    def id(self):# pylint: disable=[invalid-name]
-        """Return the client_id."""
-        return self.client_id
-
-    @property
-    def grant_types(self) -> Sequence[str]:
-        """
-        Return the grant types that this client supports.
-
-        Valid grant types:
-        * authorisation_code
-        * implicit
-        * client_credentials
-        * password
-        """
-        return self.client_metadata.get("grant_types", [])
-
-    def check_grant_type(self, grant_type: str) -> bool:
-        """
-        Validate that client can handle the given grant types
-        """
-        return grant_type in self.grant_types
-
-    @property
-    def redirect_uris(self) -> Sequence[str]:
-        """Return the redirect_uris that this client supports."""
-        return self.client_metadata.get('redirect_uris', [])
-
-    def check_redirect_uri(self, redirect_uri: str) -> bool:
-        """
-        Check whether the given `redirect_uri` is one of the expected ones.
-        """
-        return redirect_uri in self.redirect_uris
-
-    @property
-    def response_types(self) -> Sequence[str]:
-        """Return the response_types that this client supports."""
-        return self.client_metadata.get("response_type", [])
-
-    def check_response_type(self, response_type: str) -> bool:
-        """Check whether this client supports `response_type`."""
-        return response_type in self.response_types
-
-    @property
-    def scope(self) -> Sequence[str]:
-        """Return valid scopes for this client."""
-        return tuple(set(self.client_metadata.get("scope", [])))
-
-    def get_allowed_scope(self, scope: str) -> str:
-        """Return list of scopes in `scope` that are supported by this client."""
-        if not bool(scope):
-            return ""
-        requested = scope.split()
-        return " ".join(sorted(set(
-            scp for scp in requested if scp in self.scope)))
-
-    def get_client_id(self):
-        """Return this client's identifier."""
-        return self.client_id
-
-    def get_default_redirect_uri(self) -> str:
-        """Return the default redirect uri"""
-        return self.client_metadata.get("default_redirect_uri", "")
-
-def client(conn: db.DbConnection, client_id: UUID,
-           user: Optional[User] = None) -> Maybe:
-    """Retrieve a client by its ID"""
-    with db.cursor(conn) as cursor:
-        cursor.execute(
-            "SELECT * FROM oauth2_clients WHERE client_id=?", (str(client_id),))
-        result = cursor.fetchone()
-        the_user = user
-        if result:
-            if not bool(the_user):
-                try:
-                    the_user = user_by_id(conn, result["user_id"])
-                except NotFoundError as _nfe:
-                    the_user = None
-
-            return Just(
-                OAuth2Client(UUID(result["client_id"]),
-                             result["client_secret"],
-                             datetime.datetime.fromtimestamp(
-                                 result["client_id_issued_at"]),
-                             datetime.datetime.fromtimestamp(
-                                 result["client_secret_expires_at"]),
-                             json.loads(result["client_metadata"]),
-                             the_user))# type: ignore[arg-type]
-
-    return Nothing
-
-def client_by_id_and_secret(conn: db.DbConnection, client_id: UUID,
-                            client_secret: str) -> OAuth2Client:
-    """Retrieve a client by its ID and secret"""
-    with db.cursor(conn) as cursor:
-        cursor.execute(
-            "SELECT * FROM oauth2_clients WHERE client_id=?",
-            (str(client_id),))
-        row = cursor.fetchone()
-        if bool(row) and same_password(client_secret, row["client_secret"]):
-            return OAuth2Client(
-                client_id, client_secret,
-                datetime.datetime.fromtimestamp(row["client_id_issued_at"]),
-                datetime.datetime.fromtimestamp(
-                    row["client_secret_expires_at"]),
-                json.loads(row["client_metadata"]),
-                user_by_id(conn, UUID(row["user_id"])))
-
-        raise NotFoundError("Could not find client with the given credentials.")
-
-def save_client(conn: db.DbConnection, the_client: OAuth2Client) -> OAuth2Client:
-    """Persist the client details into the database."""
-    with db.cursor(conn) as cursor:
-        query = (
-            "INSERT INTO oauth2_clients "
-            "(client_id, client_secret, client_id_issued_at, "
-            "client_secret_expires_at, client_metadata, user_id) "
-            "VALUES "
-            "(:client_id, :client_secret, :client_id_issued_at, "
-            ":client_secret_expires_at, :client_metadata, :user_id) "
-            "ON CONFLICT (client_id) DO UPDATE SET "
-            "client_secret=:client_secret, "
-            "client_id_issued_at=:client_id_issued_at, "
-            "client_secret_expires_at=:client_secret_expires_at, "
-            "client_metadata=:client_metadata, user_id=:user_id")
-        cursor.execute(
-            query,
-            {
-                "client_id": str(the_client.client_id),
-                "client_secret": the_client.client_secret,
-                "client_id_issued_at": (
-                    the_client.client_id_issued_at.timestamp()),
-                "client_secret_expires_at": (
-                    the_client.client_secret_expires_at.timestamp()),
-                "client_metadata": json.dumps(the_client.client_metadata),
-                "user_id": str(the_client.user.user_id)
-            })
-        return the_client
-
-def oauth2_clients(conn: db.DbConnection) -> tuple[OAuth2Client, ...]:
-    """Fetch a list of all OAuth2 clients."""
-    with db.cursor(conn) as cursor:
-        cursor.execute("SELECT * FROM oauth2_clients")
-        clients_rs = cursor.fetchall()
-        the_users = {
-            usr.user_id: usr for usr in users(
-                conn, tuple({UUID(result["user_id"]) for result in clients_rs}))
-        }
-        return tuple(OAuth2Client(UUID(result["client_id"]),
-                                  result["client_secret"],
-                                  datetime.datetime.fromtimestamp(
-                                     result["client_id_issued_at"]),
-                                  datetime.datetime.fromtimestamp(
-                                     result["client_secret_expires_at"]),
-                                  json.loads(result["client_metadata"]),
-                                  the_users[UUID(result["user_id"])])
-                     for result in clients_rs)
-
-def delete_client(conn: db.DbConnection, the_client: OAuth2Client) -> OAuth2Client:
-    """Delete the given client from the database"""
-    with db.cursor(conn) as cursor:
-        params = (str(the_client.client_id),)
-        cursor.execute("DELETE FROM authorisation_code WHERE client_id=?",
-                       params)
-        cursor.execute("DELETE FROM oauth2_tokens WHERE client_id=?", params)
-        cursor.execute("DELETE FROM oauth2_clients WHERE client_id=?", params)
-        return the_client
diff --git a/gn3/auth/authentication/oauth2/models/oauth2token.py b/gn3/auth/authentication/oauth2/models/oauth2token.py
deleted file mode 100644
index bfe4aaf..0000000
--- a/gn3/auth/authentication/oauth2/models/oauth2token.py
+++ /dev/null
@@ -1,133 +0,0 @@
-"""OAuth2 Token"""
-import uuid
-import datetime
-from typing import NamedTuple, Optional
-
-from pymonad.maybe import Just, Maybe, Nothing
-
-from gn3.auth import db
-from gn3.auth.authentication.users import User, user_by_id
-
-from gn3.auth.authorisation.errors import NotFoundError
-
-from .oauth2client import client, OAuth2Client
-
-class OAuth2Token(NamedTuple):
-    """Implement Tokens for OAuth2."""
-    token_id: uuid.UUID
-    client: OAuth2Client
-    token_type: str
-    access_token: str
-    refresh_token: Optional[str]
-    scope: str
-    revoked: bool
-    issued_at: datetime.datetime
-    expires_in: int
-    user: User
-
-    @property
-    def expires_at(self) -> datetime.datetime:
-        """Return the time when the token expires."""
-        return self.issued_at + datetime.timedelta(seconds=self.expires_in)
-
-    def check_client(self, client: OAuth2Client) -> bool:# pylint: disable=[redefined-outer-name]
-        """Check whether the token is issued to given `client`."""
-        return client.client_id == self.client.client_id
-
-    def get_expires_in(self) -> int:
-        """Return the `expires_in` value for the token."""
-        return self.expires_in
-
-    def get_scope(self) -> str:
-        """Return the valid scope for the token."""
-        return self.scope
-
-    def is_expired(self) -> bool:
-        """Check whether the token is expired."""
-        return self.expires_at < datetime.datetime.now()
-
-    def is_revoked(self):
-        """Check whether the token has been revoked."""
-        return self.revoked
-
-def __token_from_resultset__(conn: db.DbConnection, rset) -> Maybe:
-    def __identity__(val):
-        return val
-    try:
-        the_user = user_by_id(conn, uuid.UUID(rset["user_id"]))
-    except NotFoundError as _nfe:
-        the_user = None
-    the_client = client(conn, uuid.UUID(rset["client_id"]), the_user)
-
-    if the_client.is_just() and bool(the_user):
-        return Just(OAuth2Token(token_id=uuid.UUID(rset["token_id"]),
-                                client=the_client.maybe(None, __identity__),
-                                token_type=rset["token_type"],
-                                access_token=rset["access_token"],
-                                refresh_token=rset["refresh_token"],
-                                scope=rset["scope"],
-                                revoked=(rset["revoked"] == 1),
-                                issued_at=datetime.datetime.fromtimestamp(
-                                    rset["issued_at"]),
-                                expires_in=rset["expires_in"],
-                                user=the_user))# type: ignore[arg-type]
-
-    return Nothing
-
-def token_by_access_token(conn: db.DbConnection, token_str: str) -> Maybe:
-    """Retrieve token by its token string"""
-    with db.cursor(conn) as cursor:
-        cursor.execute("SELECT * FROM oauth2_tokens WHERE access_token=?",
-                       (token_str,))
-        res = cursor.fetchone()
-        if res:
-            return __token_from_resultset__(conn, res)
-
-    return Nothing
-
-def token_by_refresh_token(conn: db.DbConnection, token_str: str) -> Maybe:
-    """Retrieve token by its token string"""
-    with db.cursor(conn) as cursor:
-        cursor.execute(
-            "SELECT * FROM oauth2_tokens WHERE refresh_token=?",
-            (token_str,))
-        res = cursor.fetchone()
-        if res:
-            return __token_from_resultset__(conn, res)
-
-    return Nothing
-
-def revoke_token(token: OAuth2Token) -> OAuth2Token:
-    """
-    Return a new token derived from `token` with the `revoked` field set to
-    `True`.
-    """
-    return OAuth2Token(
-        token_id=token.token_id, client=token.client,
-        token_type=token.token_type, access_token=token.access_token,
-        refresh_token=token.refresh_token, scope=token.scope, revoked=True,
-        issued_at=token.issued_at, expires_in=token.expires_in, user=token.user)
-
-def save_token(conn: db.DbConnection, token: OAuth2Token) -> None:
-    """Save/Update the token."""
-    with db.cursor(conn) as cursor:
-        cursor.execute(
-            ("INSERT INTO oauth2_tokens VALUES (:token_id, :client_id, "
-             ":token_type, :access_token, :refresh_token, :scope, :revoked, "
-             ":issued_at, :expires_in, :user_id) "
-             "ON CONFLICT (token_id) DO UPDATE SET "
-             "refresh_token=:refresh_token, revoked=:revoked, "
-             "expires_in=:expires_in "
-             "WHERE token_id=:token_id"),
-            {
-                "token_id": str(token.token_id),
-                "client_id": str(token.client.client_id),
-                "token_type": token.token_type,
-                "access_token": token.access_token,
-                "refresh_token": token.refresh_token,
-                "scope": token.scope,
-                "revoked": 1 if token.revoked else 0,
-                "issued_at": int(token.issued_at.timestamp()),
-                "expires_in": token.expires_in,
-                "user_id": str(token.user.user_id)
-            })