add authprovider owncloudsql

[butonic]

I added an authprovider that can be configured to authenticate against an owncloud classic mysql database. It verifies the password from the oc_users table. I am using this for my personal migration / parralel setup.

Tested using sqlite and in production using this toml file for reva:

[shared]
jwt_secret = "Pive-Fumkiu4"

[grpc]
address = "0.0.0.0:9999"

[grpc.services.authprovider]
auth_manager = "owncloudsql"

[grpc.services.authprovider.auth_managers.owncloudsql]
dbusername = "owncloud"
dbpassword = "secret"
dbhost = "mysql"
dbport = 3306
dbname = "owncloud"
idp = "https://idp.example.org"
#nobody = 99
#legacy_salt = ""
join_username = true
join_ownclouduuid = false

Then running grpcurl like this:

$ grpcurl -d '{"client_id": "test", "client_secret": "secret"}' -import-path ./cs3apis/ -proto ./cs3apis/cs3/auth/provider/v1beta1/provider_api.proto -plaintext localhost:9999 cs3.auth.provider.v1beta1.ProviderAPI/Authenticate
{
  "status": {
    "code": "CODE_OK",
    "trace": "00000000000000000000000000000000"
  },
  "user": {
    "id": {
      "idp": "https://idp.example.org",
      "opaqueId": "test",
      "type": "USER_TYPE_PRIMARY"
    },
    "mail": "test@example.org",
    "displayName": "test"
  },
  "tokenScope": {
    "user": {
      "resource": {
        "decoder": "json",
        "value": "***redacted***"
      },
      "role": "ROLE_OWNER"
    }
  }
}

I am only using this to test basic auth for some routes that the ocis proxy forwards to reva ... but I'd like to forward auth requests to the gateway, and then I could directly authenticate without having to go throug an ldap proxy.

[refs]

👍 Thanks for the tests!

A few remarks:

• if the use of queries becomes more prominent we should consider using a query builder

[labkode]

@butonic can you add a line to the CODEOWNERS to also track this plugin?

[butonic]

@labkode @ishank011 rebased, added CODEOWNERS line, good to merge