bitbake: hashserv: Add user permissions

Adds support for the hashserver to have per-user permissions. User
management is done via a new "auth" RPC API where a client can
authenticate itself with the server using a randomly generated token.
The user can then be given permissions to read, report, manage the
database, or manage other users.

In addition to explicit user logins, the server supports anonymous users
which is what all users start as before they make the "auth" RPC call.
Anonymous users can be assigned a set of permissions by the server,
making it unnecessary for users to authenticate to use the server. The
set of Anonymous permissions defines the default behavior of the server,
for example if set to "@read", Anonymous users are unable to report
equivalent hashes with authenticating. Similarly, setting the Anonymous
permissions to "@none" would require authentication for users to perform
any action.

User creation and management is entirely manual (although
bitbake-hashclient is very useful as a front end). There are many
different mechanisms that could be implemented to allow user
self-registration (e.g. OAuth, LDAP, etc.), and implementing these is
outside the scope of the server. Instead, it is recommended to
implement a registration service that validates users against the
necessary service, then adds them as a user in the hash equivalence
server.

(Bitbake rev: 69e5417413ee2414fffaa7dd38057573bac56e35)

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 37 insertions, 0 deletions

diff --git a/bitbake/bin/bitbake-hashserv b/bitbake/bin/bitbake-hashserv
index 59b8b07f59..1085d0584e 100755
--- a/bitbake/bin/bitbake-hashserv
+++ b/bitbake/bin/bitbake-hashserv
@@ -17,6 +17,7 @@ warnings.simplefilter("default")
 sys.path.insert(0, os.path.join(os.path.dirname(os.path.dirname(__file__)), "lib"))
 
 import hashserv
+from hashserv.server import DEFAULT_ANON_PERMS
 
 VERSION = "1.0.0"
 
@@ -36,6 +37,22 @@ The bind address may take one of the following formats:
 To bind to all addresses, leave the ADDRESS empty, e.g. "--bind :8686" or
 "--bind ws://:8686". To bind to a specific IPv6 address, enclose the address in
 "[]", e.g. "--bind [::1]:8686" or "--bind ws://[::1]:8686"
+
+Note that the default Anonymous permissions are designed to not break existing
+server instances when upgrading, but are not particularly secure defaults. If
+you want to use authentication, it is recommended that you use "--anon-perms
+@read" to only give anonymous users read access, or "--anon-perms @none" to
+give un-authenticated users no access at all.
+
+Setting "--anon-perms @all" or "--anon-perms @user-admin" is not allowed, since
+this would allow anonymous users to manage all users accounts, which is a bad
+idea.
+
+If you are using user authentication, you should run your server in websockets
+mode with an SSL terminating load balancer in front of it (as this server does
+not implement SSL). Otherwise all usernames and passwords will be transmitted
+in the clear. When configured this way, clients can connect using a secure
+websocket, as in "wss://SERVER:PORT"
         """,
     )
 
@@ -79,6 +96,22 @@ To bind to all addresses, leave the ADDRESS empty, e.g. "--bind :8686" or
         default=os.environ.get("HASHSERVER_DB_PASSWORD", None),
         help="Database password ($HASHSERVER_DB_PASSWORD)",
     )
+    parser.add_argument(
+        "--anon-perms",
+        metavar="PERM[,PERM[,...]]",
+        default=os.environ.get("HASHSERVER_ANON_PERMS", ",".join(DEFAULT_ANON_PERMS)),
+        help='Permissions to give anonymous users (default $HASHSERVER_ANON_PERMS, "%(default)s")',
+    )
+    parser.add_argument(
+        "--admin-user",
+        default=os.environ.get("HASHSERVER_ADMIN_USER", None),
+        help="Create default admin user with name ADMIN_USER ($HASHSERVER_ADMIN_USER)",
+    )
+    parser.add_argument(
+        "--admin-password",
+        default=os.environ.get("HASHSERVER_ADMIN_PASSWORD", None),
+        help="Create default admin user with password ADMIN_PASSWORD ($HASHSERVER_ADMIN_PASSWORD)",
+    )
 
     args = parser.parse_args()
 
@@ -94,6 +127,7 @@ To bind to all addresses, leave the ADDRESS empty, e.g. "--bind :8686" or
     logger.addHandler(console)
 
     read_only = (os.environ.get("HASHSERVER_READ_ONLY", "0") == "1") or args.read_only
+    anon_perms = args.anon_perms.split(",")
 
     server = hashserv.create_server(
         args.bind,
@@ -102,6 +136,9 @@ To bind to all addresses, leave the ADDRESS empty, e.g. "--bind :8686" or
         read_only=read_only,
         db_username=args.db_username,
         db_password=args.db_password,
+        anon_perms=anon_perms,
+        admin_username=args.admin_user,
+        admin_password=args.admin_password,
     )
     server.serve_forever()
     return 0