Source file protocol.ml
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module Stable = struct
open! Core.Core_stable
module Conn_type = Conn_type.Stable
module Conn_type_preference = Conn_type_preference.Stable
end
module V1 = struct
module Mode = struct
type t =
| Service
| User_to_user of string
[@@deriving bin_io, sexp]
end
=
{ accepted_conn_types : Conn_type.V1.t list
; principal : string
; endpoint : Mode.t
}
[@@deriving bin_io, fields]
end
=
{ accepted_conn_types : Conn_type.V1.t list
; ap_request : Krb_internal_public.Auth_context.Ap_req.t
}
[@@deriving bin_io, fields]
end
end
module V2 = struct
module Mode = struct
type t = V1.Mode.t =
| Service
| User_to_user of string
[@@deriving bin_io, sexp]
end
=
{ accepted_conn_types : Conn_type_preference.V1.t
; principal : Principal.Stable.Name.V1.t
; endpoint : Mode.t
}
[@@deriving bin_io, fields, sexp]
end
=
{ accepted_conn_types : Conn_type_preference.V1.t
; ap_request : Bigstring.V1.t
}
[@@deriving bin_io, fields, sexp]
end
end
module V3 = struct
module Mode = struct
type t = V1.Mode.t =
| Service
| User_to_user of string
[@@deriving bin_io, sexp]
end
=
{ accepted_conn_types : Conn_type_preference.V1.t
; principal : Principal.Stable.Name.V1.t
; endpoint : Mode.t
; wants_forwarded_creds : bool
}
[@@deriving bin_io, fields, sexp]
end
=
{ accepted_conn_types : Conn_type_preference.V1.t
; ap_request : Bigstring.V1.t
; forward_credentials_if_requested : bool
}
[@@deriving bin_io, fields, sexp]
end
end
module V4 = struct
module Mode = struct
type t = V1.Mode.t =
| Service
| User_to_user of string
[@@deriving bin_io, sexp]
end
=
{ accepted_conn_types : Conn_type_preference.V1.t
; principal : Principal.Stable.Name.V1.t
; endpoint : Mode.t
}
[@@deriving bin_io, fields, sexp]
end
=
{ accepted_conn_types : Conn_type_preference.V1.t
; ap_request : Bigstring.V1.t
; forwarded_creds_ap_request : Bigstring.V1.t
}
[@@deriving bin_io, fields, sexp]
end
end
module V5 = struct
module Mode = struct
type t = V1.Mode.t =
| Service
| User_to_user of string
[@@deriving bin_io, sexp]
end
=
{ accepted_conn_types : Conn_type_preference.V1.t
; principal : Cross_realm_principal_name.Stable.V1.t
; endpoint : Mode.t
}
[@@deriving bin_io, fields, sexp]
end
= V4.Client_header.t =
{ accepted_conn_types : Conn_type_preference.V1.t
; ap_request : Bigstring.V1.t
; forwarded_creds_ap_request : Bigstring.V1.t
}
[@@deriving bin_io, fields, sexp]
end
end
end
open Core
open Async
open Import
include Protocol_intf
module Auth_context = Internal.Auth_context
module Credentials = Internal.Credentials
module Flags = Internal.Krb_flags
module Debug = Internal.Debug
let krb_error = Deferred.Result.map_error ~f:(fun e -> `Krb_error e)
let handshake_error' ~kind error = `Handshake_error (Handshake_error.of_error ~kind error)
let handshake_error ~kind r = Deferred.Result.map_error r ~f:(handshake_error' ~kind)
let supported_versions = Stable.Header.V1.versions
module Make (Backend : Protocol_backend_intf.S) = struct
type protocol_backend = Backend.t
module Connection = struct
type protocol_backend = Backend.t
type t =
{ backend : Backend.t
; auth_context : [ `Test_mode | `Prod of Auth_context.t ]
; conn_type : Conn_type.t
; forwarded_creds_auth_context : Auth_context.t option
; cred_cache : Internal.Cred_cache.t option
; my_principal : Cross_realm_principal_name.t
; peer_principal : Cross_realm_principal_name.t
; protocol_version : [ `Test_mode | `Versioned of int ]
}
[@@deriving fields]
module Cross_realm = struct
let my_principal = my_principal
let peer_principal = peer_principal
end
let my_principal t = Cross_realm.my_principal t |> Principal.Name.of_cross_realm
let peer_principal t = Cross_realm.peer_principal t |> Principal.Name.of_cross_realm
let create = Fields.create
let create_for_test_mode =
create
~auth_context:`Test_mode
~forwarded_creds_auth_context:None
~cred_cache:None
~protocol_version:`Test_mode
;;
let create_no_forwarded_creds =
create ~forwarded_creds_auth_context:None ~cred_cache:None
;;
let create_client = create
let create_server = create ~cred_cache:None
let can_forward_creds t =
Option.is_some t.cred_cache && Option.is_some t.forwarded_creds_auth_context
;;
let try_to_ensure_tgt_is_valid_for_long_enough ~principal ~cred_cache =
match%bind
Tgt.Cross_realm.ensure_valid
~valid_for_at_least:(Time.Span.of_hr 1.)
~keytab:User
~cred_cache
principal
with
| Ok () -> return ()
| Error error ->
Log.Global.error_s
[%message
"Failed to renew credentials before forwarding. The ticket lifetime might be \
short."
(error : Error.t)];
return ()
;;
let make_krb_cred t ~forwardable =
let open Deferred.Or_error.Let_syntax in
let%bind client = Principal.Cross_realm.create t.my_principal in
match Option.both t.forwarded_creds_auth_context t.cred_cache with
| Some (auth_context, cred_cache) ->
let%bind () =
try_to_ensure_tgt_is_valid_for_long_enough ~principal:t.my_principal ~cred_cache
|> Deferred.ok
in
Auth_context.Client.make_krb_cred auth_context ~forwardable ~client cred_cache
| None ->
Deferred.Or_error.error_s
[%message
"Unable to make krb_cred for forwarded credentials."
~required_protocol_version:
([ `Versioned 4; `Versioned 5 ] : [ `Versioned of int ] list)
~negotiated_protocol_version:
(t.protocol_version : [ `Test_mode | `Versioned of int ])]
;;
let read_krb_cred t krb_cred =
let open Deferred.Or_error.Let_syntax in
let%bind cred_cache =
Cred_cache.Cross_realm.in_memory_for_principal t.peer_principal
in
match t.forwarded_creds_auth_context with
| None ->
Deferred.Or_error.error_s
[%message
"Unable to read krb_cred for forwarded credentials"
~required_protocol_version:
([ `Versioned 4; `Versioned 5 ] : [ `Versioned of int ] list)
~negotiated_protocol_version:
(t.protocol_version : [ `Test_mode | `Versioned of int ])]
| Some auth_context ->
let%map () =
Auth_context.Service.read_krb_cred_into_cred_cache
auth_context
krb_cred
cred_cache
in
cred_cache
;;
end
let read_bin_prot' ~backend ~name bin_reader =
Backend.read_bin_prot backend bin_reader
>>| function
| `Eof ->
let error =
Error.create_s
[%message
"Connection closed"
~while_reading:(name : string)
~connection:(Backend.info backend : Info.t)]
in
Error (handshake_error' ~kind:Unexpected_or_no_client_bytes error)
| `Ok res -> Ok res
;;
let read_bin_prot ~backend ~name bin_reader =
match%map read_bin_prot' ~backend ~name bin_reader with
| Error (`Handshake_error (_, e)) -> Error e
| Ok _ as res -> res
;;
let read_field' ~conn_type ~auth_context ~backend ~name bin_reader =
read_bin_prot' ~backend ~name Bigstring.Stable.V1.bin_reader_t
>>=? fun res ->
(match (conn_type : Conn_type.t) with
| Auth -> Deferred.Or_error.return res
| Safe -> Auth_context.Safe.decode auth_context (Bigsubstring.create res)
| Priv -> Auth_context.Priv.decode auth_context (Bigsubstring.create res))
|> krb_error
>>=? fun buf ->
Or_error.map (Bigstring.read_bin_prot buf bin_reader) ~f:fst
|> return
|> handshake_error ~kind:Unexpected_or_no_client_bytes
;;
let read_field ~conn_type ~auth_context ~backend ~name bin_reader =
match%map read_field' ~conn_type ~auth_context ~backend ~name bin_reader with
| Error (`Krb_error e) | Error (`Handshake_error (_, e)) -> Error e
| Ok _ as res -> res
;;
let write_field' ~conn_type ~auth_context ~backend bin_writer value =
let bs = Bin_prot.Utils.bin_dump ~header:true bin_writer value in
(match (conn_type : Conn_type.t) with
| Auth -> Deferred.Or_error.return bs
| Safe -> Auth_context.Safe.encode auth_context (Bigsubstring.create bs)
| Priv -> Auth_context.Priv.encode auth_context (Bigsubstring.create bs))
|> krb_error
>>|? fun x -> Backend.write_bin_prot_exn backend Bigstring.Stable.V1.bin_writer_t x
;;
let write_field ~conn_type ~auth_context ~backend bin_writer value =
match%map write_field' ~conn_type ~auth_context ~backend bin_writer value with
| Error (`Krb_error e) | Error (`Handshake_error e) -> Error e
| Ok _ as res -> res
;;
module Unstable = struct
module Conn_type = Conn_type
module Conn_type_preference = Conn_type_preference
end
open Stable
let debug_log_connection_setup ~peer ~conn_type ~user_to_user ~acting_as =
Debug.log_s (fun () ->
[%message
"Kerberized connection setup"
(acting_as : [ `Client | `Server ])
(peer : Socket.Address.Inet.t)
(conn_type : Unstable.Conn_type.t)
(user_to_user : bool)])
;;
module V1 = struct
module Ap_req = Auth_context.Ap_req
module Auth_context = Auth_context.V1
module Mode = struct
type t = Stable.V1.Mode.t =
| Service
| User_to_user of string
[@@deriving bin_io, sexp]
let is_user_to_user = function
| Service -> false
| User_to_user _ -> true
;;
end
= Stable.V1.Server_header.t =
{ accepted_conn_types : Conn_type.V1.t list
; principal : string
; endpoint : Mode.t
}
[@@deriving bin_io, fields]
let ~backend t = Backend.write_bin_prot_exn backend bin_writer_t t
let ~backend = read_bin_prot ~backend ~name:"Server header" bin_reader_t
end
= Stable.V1.Client_header.t =
{ accepted_conn_types : Conn_type.V1.t list
; ap_request : Ap_req.t
}
[@@deriving bin_io, fields]
let ~backend t = Backend.write_bin_prot_exn backend bin_writer_t t
let ~backend = read_bin_prot' ~backend ~name:"Client header" bin_reader_t
end
end
let handle_error ~backend tag result =
Result.iter_error result ~f:(fun _ ->
let e = Error.createf "This value will never be read" in
Backend.write_bin_prot_exn
backend
(Or_error.Stable.V2.bin_writer_t Unit.bin_writer_t)
(Or_error.tag ~tag (Error e)));
result
;;
module Server = struct
let do_setup ~accepted_conn_types ~authorize ~principal ~peer endpoint backend =
let principal_s = Principal.to_string principal in
(match endpoint with
| `Service keytab -> return (Ok (Mode.Service, `Keytab keytab))
| `User_to_user_via_tgt tgt ->
let endpoint = Mode.User_to_user (Credentials.ticket_string tgt) in
Credentials.keyblock tgt
|> krb_error
>>|? fun keyblock -> endpoint, `User_to_user keyblock)
>>=? fun (endpoint, authentication_key) ->
let accepted_conn_types =
Unstable.Conn_type_preference.to_set accepted_conn_types
in
let =
Header.Server.Fields.create
~accepted_conn_types:(Set.to_list accepted_conn_types)
~principal:principal_s
~endpoint
in
Header.Server.write ~backend header;
Header.Client.read' ~backend
>>| handle_error ~backend "failed to read client header"
>>=? fun ->
Unstable.Conn_type.negotiate_strongest
~us:accepted_conn_types
~peer:
(Header.Client.accepted_conn_types client_header
|> Unstable.Conn_type.Set.of_list)
|> return
|> handshake_error ~kind:Incompatible_client
>>=? fun conn_type ->
debug_log_connection_setup
~peer
~conn_type
~user_to_user:(Mode.is_user_to_user endpoint)
~acting_as:`Server;
Auth_context.Service.init
principal
authentication_key
~ap_req:(Header.Client.ap_request client_header)
~local_inet:(Backend.local_inet backend)
~remote_inet:(Backend.remote_inet backend)
|> krb_error
>>| handle_error ~backend "failed to initiate auth_context"
>>=? fun (auth_context, client) ->
let client_principal_name = Principal.Cross_realm.name client in
let my_principal = Principal.Cross_realm.name principal in
Authorizer.run
~authorize
~acting_as:Server
~my_principal
~peer_address:peer
~peer_principal:client_principal_name
>>= fun authorize_result ->
write_field'
~conn_type
~auth_context
~backend
(Or_error.Stable.V2.bin_writer_t Unit.bin_writer_t)
authorize_result
>>=? fun () ->
read_field' ~conn_type ~auth_context ~backend ~name:"Client ack" Unit.bin_reader_t
>>|? fun () ->
let conn =
Connection.create_no_forwarded_creds
~conn_type
~auth_context:(`Prod auth_context)
~backend
~my_principal
~peer_principal:client_principal_name
~protocol_version:(`Versioned 1)
in
conn, authorize_result
;;
let setup ~accepted_conn_types ~authorize ~principal ~peer endpoint backend =
do_setup ~accepted_conn_types ~authorize ~principal ~peer endpoint backend
>>| function
| Error _ as error -> error
| Ok ((_ : Connection.t), Error (_ : Error.t)) -> Error `Rejected_client
| Ok (conn, Ok ()) -> Ok conn
;;
end
module Client = struct
let setup_client_context ~cred_cache ~backend =
let second_ticket, cred_cache_flags, client_context_flags =
match Header.Server.endpoint server_header with
| Service -> None, [], [ Flags.Ap_req.AP_OPTS_MUTUAL_REQUIRED ]
| User_to_user tgt ->
( Some tgt
, [ Flags.Get_credentials.KRB5_GC_USER_USER ]
, [ AP_OPTS_USE_SESSION_KEY; AP_OPTS_MUTUAL_REQUIRED ] )
in
Internal.Cred_cache.principal cred_cache
>>=? fun client ->
Internal.Principal.of_string (Header.Server.principal server_header)
>>=? fun server ->
Credentials.create ?second_ticket ~client ~server ()
>>=? fun credentials_request ->
Internal.Cred_cache.get_credentials
~flags:cred_cache_flags
cred_cache
~request:credentials_request
>>=? fun credentials ->
Auth_context.Client.init
client_context_flags
credentials
~local_inet:(Backend.local_inet backend)
~remote_inet:(Backend.remote_inet backend)
;;
let setup ~cred_cache ~accepted_conn_types ~authorize ~peer backend =
Header.Server.read ~backend
>>=? fun ->
let accepted_conn_types =
Unstable.Conn_type_preference.to_set accepted_conn_types
in
Unstable.Conn_type.negotiate_strongest
~us:accepted_conn_types
~peer:
(Header.Server.accepted_conn_types server_header
|> Unstable.Conn_type.Set.of_list)
|> return
>>=? fun conn_type ->
debug_log_connection_setup
~peer
~conn_type
~user_to_user:(Mode.is_user_to_user server_header.endpoint)
~acting_as:`Client;
let server_principal_s = Header.Server.principal server_header in
Internal.Principal.of_string server_principal_s
>>=? fun server_principal ->
Cred_cache.Cross_realm.principal cred_cache
>>=? fun my_principal ->
let server_principal_name = Principal.Cross_realm.name server_principal in
Authorizer.run
~authorize
~acting_as:Client
~my_principal
~peer_address:peer
~peer_principal:server_principal_name
>>=? fun () ->
setup_client_context ~cred_cache ~backend server_header
>>=? fun (auth_context, ap_request) ->
let =
Header.Client.Fields.create
~accepted_conn_types:(Set.to_list accepted_conn_types)
~ap_request
in
Header.Client.write ~backend client_header;
write_field ~conn_type ~auth_context ~backend Unit.bin_writer_t ()
>>=? fun () ->
read_field
~conn_type
~auth_context
~backend
~name:"Server ack"
(Or_error.Stable.V2.bin_reader_t Unit.bin_reader_t)
>>| Or_error.join
>>|? fun () ->
Connection.create_no_forwarded_creds
~conn_type
~auth_context:(`Prod auth_context)
~backend
~my_principal
~peer_principal:server_principal_name
~protocol_version:(`Versioned 1)
;;
end
end
module V2 = struct
module Mode = struct
type t = Stable.V2.Mode.t =
| Service
| User_to_user of string
[@@deriving bin_io, sexp]
let is_user_to_user = function
| Service -> false
| User_to_user _ -> true
;;
end
= Stable.V2.Server_header.t =
{ accepted_conn_types : Conn_type_preference.V1.t
; principal : Principal.Stable.Name.V1.t
; endpoint : Mode.t
}
[@@deriving bin_io, fields, sexp]
let ~backend t = Backend.write_bin_prot_exn backend bin_writer_t t
let ~backend = read_bin_prot ~backend ~name:"Server header" bin_reader_t
end
= Stable.V2.Client_header.t =
{ accepted_conn_types : Conn_type_preference.V1.t
; ap_request : Bigstring.Stable.V1.t
}
[@@deriving bin_io, fields, sexp]
let ~backend t = Backend.write_bin_prot_exn backend bin_writer_t t
let ~backend = read_bin_prot' ~backend ~name:"Client header" bin_reader_t
end
end
module Server = struct
let do_setup ~accepted_conn_types ~authorize ~principal ~peer endpoint backend =
(match endpoint with
| `Service keytab -> return (Ok (Mode.Service, `Keytab keytab))
| `User_to_user_via_tgt tgt ->
let endpoint = Mode.User_to_user (Credentials.ticket_string tgt) in
Credentials.keyblock tgt
|> krb_error
>>|? fun keyblock -> endpoint, `User_to_user keyblock)
>>=? fun (endpoint, authentication_key) ->
let =
Header.Server.Fields.create
~accepted_conn_types
~principal:(Principal.name principal)
~endpoint
in
Header.Server.write ~backend header;
Header.Client.read' ~backend
>>=? fun ->
Unstable.Conn_type_preference.negotiate
~us:accepted_conn_types
~peer:(Header.Client.accepted_conn_types client_header)
|> return
|> handshake_error ~kind:Incompatible_client
>>=? fun conn_type ->
debug_log_connection_setup
~peer
~conn_type
~user_to_user:(Mode.is_user_to_user endpoint)
~acting_as:`Server;
Auth_context.Service.init
principal
authentication_key
~ap_req:(Header.Client.ap_request client_header)
~local_inet:(Backend.local_inet backend)
~remote_inet:(Backend.remote_inet backend)
|> krb_error
>>=? fun (auth_context, client) ->
Auth_context.Service.make_ap_rep auth_context
|> krb_error
>>=? fun ap_rep ->
Header.Ap_rep.write ~backend ap_rep;
let my_principal = Principal.Cross_realm.name principal in
let client_principal_name = Principal.Cross_realm.name client in
Authorizer.run
~authorize
~acting_as:Server
~my_principal
~peer_address:peer
~peer_principal:client_principal_name
>>= fun authorize_result ->
write_field'
~conn_type
~auth_context
~backend
(Or_error.Stable.V2.bin_writer_t Unit.bin_writer_t)
authorize_result
>>=? fun () ->
read_field' ~conn_type ~auth_context ~backend ~name:"Client ack" Unit.bin_reader_t
>>|? fun () ->
let conn =
Connection.create_no_forwarded_creds
~conn_type
~auth_context:(`Prod auth_context)
~backend
~my_principal
~peer_principal:client_principal_name
~protocol_version:(`Versioned 2)
in
conn, authorize_result
;;
let setup ~accepted_conn_types ~authorize ~principal ~peer endpoint backend =
do_setup ~accepted_conn_types ~authorize ~principal ~peer endpoint backend
>>| function
| Error _ as error -> error
| Ok ((_ : Connection.t), Error (_ : Error.t)) -> Error `Rejected_client
| Ok (conn, Ok ()) -> Ok conn
;;
end
module Client = struct
let setup_client_context ~cred_cache ~backend =
ignore (backend : Backend.t);
let second_ticket, cred_cache_flags, client_context_flags =
match Header.Server.endpoint server_header with
| Service -> None, [], [ Flags.Ap_req.AP_OPTS_MUTUAL_REQUIRED ]
| User_to_user tgt ->
( Some tgt
, [ Flags.Get_credentials.KRB5_GC_USER_USER ]
, [ AP_OPTS_USE_SESSION_KEY; AP_OPTS_MUTUAL_REQUIRED ] )
in
Internal.Cred_cache.principal cred_cache
>>=? fun client ->
Principal.create (Header.Server.principal server_header)
>>=? fun server ->
Credentials.create ?second_ticket ~client ~server ()
>>=? fun credentials_request ->
Internal.Cred_cache.get_credentials
~flags:cred_cache_flags
cred_cache
~request:credentials_request
>>=? fun credentials ->
Auth_context.Client.init
client_context_flags
credentials
~local_inet:(Backend.local_inet backend)
~remote_inet:(Backend.remote_inet backend)
;;
let setup ~cred_cache ~accepted_conn_types ~authorize ~peer backend =
Header.Server.read ~backend
>>=? fun ->
Unstable.Conn_type_preference.negotiate
~us:accepted_conn_types
~peer:(Header.Server.accepted_conn_types server_header)
|> return
>>=? fun conn_type ->
debug_log_connection_setup
~peer
~conn_type
~user_to_user:(Mode.is_user_to_user server_header.endpoint)
~acting_as:`Client;
setup_client_context ~cred_cache ~backend server_header
>>=? fun (auth_context, ap_request) ->
let =
Header.Client.Fields.create ~accepted_conn_types ~ap_request
in
Header.Client.write ~backend client_header;
Header.Ap_rep.read ~backend
>>=? fun ap_rep ->
Auth_context.Client.read_and_verify_ap_rep auth_context ~ap_rep
>>=? fun () ->
Header.Server.principal server_header
|> Principal.Name.with_default_realm
>>=? fun server_principal_name ->
Cred_cache.Cross_realm.principal cred_cache
>>=? fun my_principal ->
Authorizer.run
~authorize
~acting_as:Client
~my_principal
~peer_address:peer
~peer_principal:server_principal_name
>>=? fun () ->
write_field ~conn_type ~auth_context ~backend Unit.bin_writer_t ()
>>=? fun () ->
read_field
~conn_type
~auth_context
~backend
~name:"Server ack"
(Or_error.Stable.V2.bin_reader_t Unit.bin_reader_t)
>>| Or_error.join
>>|? fun () ->
Connection.create_no_forwarded_creds
~conn_type
~auth_context:(`Prod auth_context)
~backend
~my_principal
~peer_principal:server_principal_name
~protocol_version:(`Versioned 2)
;;
end
end
module V3 = struct
module Mode = struct
type t = Stable.V3.Mode.t =
| Service
| User_to_user of string
[@@deriving bin_io, sexp]
let is_user_to_user = function
| Service -> false
| User_to_user _ -> true
;;
end
let this_version = 3
= Stable.V3.Server_header.t =
{ accepted_conn_types : Conn_type_preference.V1.t
; principal : Principal.Stable.Name.V1.t
; endpoint : Mode.t
; wants_forwarded_creds : bool
}
[@@deriving bin_io, fields, sexp]
let ~backend t = Backend.write_bin_prot_exn backend bin_writer_t t
let ~backend = read_bin_prot ~backend ~name:"Server header" bin_reader_t
end
= Stable.V3.Client_header.t =
{ accepted_conn_types : Conn_type_preference.V1.t
; ap_request : Bigstring.Stable.V1.t
; forward_credentials_if_requested : bool
}
[@@deriving bin_io, fields, sexp]
let ~backend t = Backend.write_bin_prot_exn backend bin_writer_t t
let ~backend = read_bin_prot' ~backend ~name:"Client header" bin_reader_t
end
end
module Server = struct
let do_setup
~accepted_conn_types
~authorize
~principal
~wants_forwarded_creds
~peer
endpoint
backend
=
(match endpoint with
| `Service keytab -> return (Ok (Mode.Service, `Keytab keytab))
| `User_to_user_via_tgt tgt ->
let endpoint = Mode.User_to_user (Credentials.ticket_string tgt) in
Credentials.keyblock tgt
|> krb_error
>>|? fun keyblock -> endpoint, `User_to_user keyblock)
>>=? fun (endpoint, authentication_key) ->
let =
Header.Server.Fields.create
~accepted_conn_types
~principal:(Principal.name principal)
~endpoint
~wants_forwarded_creds
in
Header.Server.write ~backend header;
Header.Client.read' ~backend
>>=? fun ->
Unstable.Conn_type_preference.negotiate
~us:accepted_conn_types
~peer:(Header.Client.accepted_conn_types client_header)
|> return
|> handshake_error ~kind:Incompatible_client
>>=? fun conn_type ->
debug_log_connection_setup
~peer
~conn_type
~user_to_user:(Mode.is_user_to_user endpoint)
~acting_as:`Server;
Auth_context.Service.init
principal
authentication_key
~ap_req:(Header.Client.ap_request client_header)
~local_inet:(Backend.local_inet backend)
~remote_inet:(Backend.remote_inet backend)
|> krb_error
>>=? fun (auth_context, client) ->
Auth_context.Service.make_ap_rep auth_context
|> krb_error
>>=? fun ap_rep ->
Header.Ap_rep.write ~backend ap_rep;
let client_principal_name = Principal.Cross_realm.name client in
let my_principal = Principal.Cross_realm.name principal in
Authorizer.run
~authorize
~acting_as:Server
~peer_address:peer
~peer_principal:client_principal_name
~my_principal
>>= fun authorize_result ->
write_field'
~conn_type
~auth_context
~backend
(Or_error.Stable.V2.bin_writer_t Unit.bin_writer_t)
authorize_result
>>=? fun () ->
read_field' ~conn_type ~auth_context ~backend ~name:"Client ack" Unit.bin_reader_t
>>=? fun () ->
Deferred.Result.Let_syntax.(
if client_header.forward_credentials_if_requested && wants_forwarded_creds
then (
let%bind krb_cred =
read_bin_prot' ~backend ~name:"KRB-CRED" Auth_context.Krb_cred.bin_reader_t
in
let%bind cred_cache =
Cred_cache.Cross_realm.in_memory_for_principal client_principal_name
|> krb_error
in
let%map () =
Auth_context.Service.read_krb_cred_into_cred_cache
auth_context
krb_cred
cred_cache
|> krb_error
in
Some cred_cache)
else return None)
>>|? fun client_creds ->
if Option.is_some client_creds
then
failwith
"BUG: Creds forwarding requested in krb V3 protocol, even though it was \
disabled in code.";
assert (Option.is_none client_creds);
let conn =
Connection.create_no_forwarded_creds
~conn_type
~auth_context:(`Prod auth_context)
~backend
~my_principal
~peer_principal:client_principal_name
~protocol_version:(`Versioned this_version)
in
conn, authorize_result
;;
let setup
~accepted_conn_types
~authorize
~principal
~wants_forwarded_creds
~peer
endpoint
backend
=
do_setup
~accepted_conn_types
~authorize
~principal
~wants_forwarded_creds
~peer
endpoint
backend
>>| function
| Error _ as error -> error
| Ok ((_ : Connection.t), Error (_ : Error.t)) -> Error `Rejected_client
| Ok (conn, Ok ()) -> Ok conn
;;
end
module Client = struct
let setup_client_context ~cred_cache ~backend =
let second_ticket, cred_cache_flags, client_context_flags =
match Header.Server.endpoint server_header with
| Service -> None, [], [ Flags.Ap_req.AP_OPTS_MUTUAL_REQUIRED ]
| User_to_user tgt ->
( Some tgt
, [ Flags.Get_credentials.KRB5_GC_USER_USER ]
, [ AP_OPTS_USE_SESSION_KEY; AP_OPTS_MUTUAL_REQUIRED ] )
in
Internal.Cred_cache.principal cred_cache
>>=? fun client ->
Principal.create (Header.Server.principal server_header)
>>=? fun server ->
Credentials.create ?second_ticket ~client ~server ()
>>=? fun credentials_request ->
Internal.Cred_cache.get_credentials
~flags:cred_cache_flags
cred_cache
~request:credentials_request
>>=? fun credentials ->
Auth_context.Client.init
client_context_flags
credentials
~local_inet:(Backend.local_inet backend)
~remote_inet:(Backend.remote_inet backend)
;;
let setup
~cred_cache
~accepted_conn_types
~authorize
~forward_credentials_if_requested
~peer
backend
=
Header.Server.read ~backend
>>=? fun ->
Unstable.Conn_type_preference.negotiate
~us:accepted_conn_types
~peer:(Header.Server.accepted_conn_types server_header)
|> return
>>=? fun conn_type ->
debug_log_connection_setup
~peer
~conn_type
~user_to_user:(Mode.is_user_to_user server_header.endpoint)
~acting_as:`Client;
setup_client_context ~cred_cache ~backend server_header
>>=? fun (auth_context, ap_request) ->
let =
Header.Client.Fields.create
~accepted_conn_types
~ap_request
~forward_credentials_if_requested
in
Header.Client.write ~backend client_header;
Header.Ap_rep.read ~backend
>>=? fun ap_rep ->
Auth_context.Client.read_and_verify_ap_rep auth_context ~ap_rep
>>=? fun () ->
Header.Server.principal server_header
|> Principal.Name.with_default_realm
>>=? fun server_principal_name ->
Cred_cache.Cross_realm.principal cred_cache
>>=? fun my_principal ->
Authorizer.run
~authorize
~acting_as:Client
~my_principal
~peer_address:peer
~peer_principal:server_principal_name
>>=? fun () ->
write_field ~conn_type ~auth_context ~backend Unit.bin_writer_t ()
>>=? fun () ->
read_field
~conn_type
~auth_context
~backend
~name:"Server ack"
(Or_error.Stable.V2.bin_reader_t Unit.bin_reader_t)
>>| Or_error.join
>>=? fun () ->
Deferred.Or_error.Let_syntax.(
if forward_credentials_if_requested && server_header.wants_forwarded_creds
then (
let%bind client = Internal.Cred_cache.principal cred_cache in
let%bind krb_cred =
Auth_context.Client.make_krb_cred
auth_context
~forwardable:false
~client
cred_cache
in
Backend.write_bin_prot_exn backend Auth_context.Krb_cred.bin_writer_t krb_cred;
return ())
else return ())
>>|? fun () ->
Connection.create_no_forwarded_creds
~conn_type
~auth_context:(`Prod auth_context)
~backend
~my_principal
~peer_principal:server_principal_name
~protocol_version:(`Versioned this_version)
;;
end
end
module V4 = struct
module Mode = struct
type t = Stable.V4.Mode.t =
| Service
| User_to_user of string
[@@deriving bin_io, sexp]
let is_user_to_user = function
| Service -> false
| User_to_user _ -> true
;;
end
let this_version = 4
= Stable.V4.Server_header.t =
{ accepted_conn_types : Conn_type_preference.V1.t
; principal : Principal.Stable.Name.V1.t
; endpoint : Mode.t
}
[@@deriving bin_io, fields, sexp]
let ~backend t = Backend.write_bin_prot_exn backend bin_writer_t t
let ~backend = read_bin_prot ~backend ~name:"Server header" bin_reader_t
end
= Stable.V4.Client_header.t =
{ accepted_conn_types : Conn_type_preference.V1.t
; ap_request : Bigstring.Stable.V1.t
; forwarded_creds_ap_request : Bigstring.Stable.V1.t
}
[@@deriving bin_io, fields, sexp]
let ~backend t = Backend.write_bin_prot_exn backend bin_writer_t t
let ~backend = read_bin_prot' ~backend ~name:"Client header" bin_reader_t
end
end
module Server = struct
let do_setup ~accepted_conn_types ~authorize ~principal ~peer endpoint backend =
(match endpoint with
| `Service keytab -> return (Ok (Mode.Service, `Keytab keytab))
| `User_to_user_via_tgt tgt ->
let endpoint = Mode.User_to_user (Credentials.ticket_string tgt) in
Credentials.keyblock tgt
|> krb_error
>>|? fun keyblock -> endpoint, `User_to_user keyblock)
>>=? fun (endpoint, authentication_key) ->
let =
Header.Server.Fields.create
~accepted_conn_types
~principal:(Principal.name principal)
~endpoint
in
Header.Server.write ~backend header;
Header.Client.read' ~backend
>>=? fun ->
Unstable.Conn_type_preference.negotiate
~us:accepted_conn_types
~peer:(Header.Client.accepted_conn_types client_header)
|> return
|> handshake_error ~kind:Incompatible_client
>>=? fun conn_type ->
debug_log_connection_setup
~peer
~conn_type
~user_to_user:(Mode.is_user_to_user endpoint)
~acting_as:`Server;
(let init_auth_context ap_req =
Auth_context.Service.init
principal
authentication_key
~ap_req
~local_inet:(Backend.local_inet backend)
~remote_inet:(Backend.remote_inet backend)
in
init_auth_context (Header.Client.ap_request client_header)
>>=? fun auth_context ->
init_auth_context (Header.Client.forwarded_creds_ap_request client_header)
>>|? fun forwarded_creds_auth_context ->
auth_context, forwarded_creds_auth_context)
|> krb_error
>>=? fun ( (auth_context, client)
, (forwarded_creds_auth_context, forwarded_creds_client) ) ->
(let client_s = Principal.to_string client in
let forwarded_creds_client_s = Principal.to_string forwarded_creds_client in
if String.equal client_s forwarded_creds_client_s
then return (Ok ())
else (
let error =
Error.create_s
[%message
"Client principals in AP_REQs don't match"
~client:(client_s : string)
~forwarded_creds_client:(forwarded_creds_client_s : string)]
in
return (Error (`Krb_error error))))
>>=? fun () ->
Auth_context.Service.make_ap_rep auth_context
|> krb_error
>>=? fun ap_rep ->
Header.Ap_rep.write ~backend ap_rep;
let my_principal = Principal.Cross_realm.name principal in
let client_principal_name = Principal.Cross_realm.name client in
Authorizer.run
~authorize
~acting_as:Server
~my_principal
~peer_address:peer
~peer_principal:client_principal_name
>>= fun authorize_result ->
write_field'
~conn_type
~auth_context
~backend
(Or_error.Stable.V2.bin_writer_t Unit.bin_writer_t)
authorize_result
>>=? fun () ->
read_field' ~conn_type ~auth_context ~backend ~name:"Client ack" Unit.bin_reader_t
>>|? fun () ->
let conn =
Connection.create_server
~conn_type
~auth_context:(`Prod auth_context)
~forwarded_creds_auth_context:(Some forwarded_creds_auth_context)
~backend
~my_principal
~peer_principal:client_principal_name
~protocol_version:(`Versioned this_version)
in
conn, authorize_result
;;
let setup ~accepted_conn_types ~authorize ~principal ~peer endpoint backend =
do_setup ~accepted_conn_types ~authorize ~principal ~peer endpoint backend
>>| function
| Error _ as error -> error
| Ok ((_ : Connection.t), Error (_ : Error.t)) -> Error `Rejected_client
| Ok (conn, Ok ()) -> Ok conn
;;
end
module Client = struct
let setup_client_context ~client_cred_cache ~backend =
let second_ticket, cred_cache_flags, client_context_flags =
match Header.Server.endpoint server_header with
| Service -> None, [], [ Flags.Ap_req.AP_OPTS_MUTUAL_REQUIRED ]
| User_to_user tgt ->
( Some tgt
, [ Flags.Get_credentials.KRB5_GC_USER_USER ]
, [ AP_OPTS_USE_SESSION_KEY; AP_OPTS_MUTUAL_REQUIRED ] )
in
let cred_cache = Client_cred_cache.cred_cache client_cred_cache in
Internal.Cred_cache.principal cred_cache
>>=? fun client ->
Principal.create (Header.Server.principal server_header)
>>=? fun server ->
Credentials.create ?second_ticket ~client ~server ()
>>=? fun credentials_request ->
Client_cred_cache.get_credentials
~flags:cred_cache_flags
client_cred_cache
~request:credentials_request
>>=? fun (credentials, `Error_getting_creds_from_default_cache maybe_error) ->
(match maybe_error with
| None -> ()
| Some error ->
Log.Global.sexp
~level:`Info
[%message
"Failed to get credentials from default cache (succeeded with memory \
cache)"
(error : Error.t)
(client_cred_cache : Client_cred_cache.t)]);
let init_auth_context () =
Auth_context.Client.init
client_context_flags
credentials
~local_inet:(Backend.local_inet backend)
~remote_inet:(Backend.remote_inet backend)
in
init_auth_context ()
>>=? fun (auth_context, ap_req) ->
init_auth_context ()
>>|? fun (forwarded_creds_auth_context, forwarded_creds_ap_req) ->
auth_context, ap_req, forwarded_creds_auth_context, forwarded_creds_ap_req
;;
let setup ~client_cred_cache ~accepted_conn_types ~authorize ~peer backend =
Header.Server.read ~backend
>>=? fun ->
Unstable.Conn_type_preference.negotiate
~us:accepted_conn_types
~peer:(Header.Server.accepted_conn_types server_header)
|> return
>>=? fun conn_type ->
debug_log_connection_setup
~peer
~conn_type
~user_to_user:(Mode.is_user_to_user server_header.endpoint)
~acting_as:`Client;
setup_client_context ~client_cred_cache ~backend server_header
>>=? fun ( auth_context
, ap_request
, forwarded_creds_auth_context
, forwarded_creds_ap_request ) ->
let =
Header.Client.Fields.create
~accepted_conn_types
~ap_request
~forwarded_creds_ap_request
in
Header.Client.write ~backend client_header;
Header.Ap_rep.read ~backend
>>=? fun ap_rep ->
Auth_context.Client.read_and_verify_ap_rep auth_context ~ap_rep
>>=? fun () ->
Header.Server.principal server_header
|> Principal.Name.with_default_realm
>>=? fun server_principal_name ->
let cred_cache = Client_cred_cache.cred_cache client_cred_cache in
Cred_cache.Cross_realm.principal cred_cache
>>=? fun my_principal ->
Authorizer.run
~authorize
~acting_as:Client
~my_principal
~peer_address:peer
~peer_principal:server_principal_name
>>=? fun () ->
write_field ~conn_type ~auth_context ~backend Unit.bin_writer_t ()
>>=? fun () ->
read_field
~conn_type
~auth_context
~backend
~name:"Server ack"
(Or_error.Stable.V2.bin_reader_t Unit.bin_reader_t)
>>| Or_error.join
>>|? fun () ->
Connection.create_client
~conn_type
~auth_context:(`Prod auth_context)
~forwarded_creds_auth_context:(Some forwarded_creds_auth_context)
~backend
~cred_cache:(Some cred_cache)
~my_principal
~peer_principal:server_principal_name
~protocol_version:(`Versioned this_version)
;;
end
end
module V5 = struct
module Mode = struct
type t = Stable.V5.Mode.t =
| Service
| User_to_user of string
[@@deriving bin_io, sexp]
let is_user_to_user = function
| Service -> false
| User_to_user _ -> true
;;
end
let this_version = 5
= Stable.V5.Server_header.t =
{ accepted_conn_types : Conn_type_preference.V1.t
; principal : Cross_realm_principal_name.Stable.V1.t
; endpoint : Mode.t
}
[@@deriving bin_io, fields, sexp]
let ~backend t = Backend.write_bin_prot_exn backend bin_writer_t t
let ~backend = read_bin_prot ~backend ~name:"Server header" bin_reader_t
end
= Stable.V5.Client_header.t =
{ accepted_conn_types : Conn_type_preference.V1.t
; ap_request : Bigstring.Stable.V1.t
; forwarded_creds_ap_request : Bigstring.Stable.V1.t
}
[@@deriving bin_io, fields, sexp]
let ~backend t = Backend.write_bin_prot_exn backend bin_writer_t t
let ~backend = read_bin_prot' ~backend ~name:"Client header" bin_reader_t
end
end
module Server = struct
let do_setup ~accepted_conn_types ~authorize ~principal ~peer endpoint backend =
(match endpoint with
| `Service keytab -> return (Ok (Mode.Service, `Keytab keytab))
| `User_to_user_via_tgt tgt ->
let endpoint = Mode.User_to_user (Credentials.ticket_string tgt) in
Credentials.keyblock tgt
|> krb_error
>>|? fun keyblock -> endpoint, `User_to_user keyblock)
>>=? fun (endpoint, authentication_key) ->
let =
Header.Server.Fields.create
~accepted_conn_types
~principal:(Principal.Cross_realm.name principal)
~endpoint
in
Header.Server.write ~backend header;
Header.Client.read' ~backend
>>=? fun ->
Unstable.Conn_type_preference.negotiate
~us:accepted_conn_types
~peer:(Header.Client.accepted_conn_types client_header)
|> return
|> handshake_error ~kind:Incompatible_client
>>=? fun conn_type ->
debug_log_connection_setup
~peer
~conn_type
~user_to_user:(Mode.is_user_to_user endpoint)
~acting_as:`Server;
(let init_auth_context ap_req =
Auth_context.Service.init
principal
authentication_key
~ap_req
~local_inet:(Backend.local_inet backend)
~remote_inet:(Backend.remote_inet backend)
in
init_auth_context (Header.Client.ap_request client_header)
>>=? fun auth_context ->
init_auth_context (Header.Client.forwarded_creds_ap_request client_header)
>>|? fun forwarded_creds_auth_context ->
auth_context, forwarded_creds_auth_context)
|> krb_error
>>=? fun ( (auth_context, client)
, (forwarded_creds_auth_context, forwarded_creds_client) ) ->
(let client_s = Principal.to_string client in
let forwarded_creds_client_s = Principal.to_string forwarded_creds_client in
if String.equal client_s forwarded_creds_client_s
then return (Ok ())
else (
let error =
Error.create_s
[%message
"Client principals in AP_REQs don't match"
~client:(client_s : string)
~forwarded_creds_client:(forwarded_creds_client_s : string)]
in
return (Error (`Krb_error error))))
>>=? fun () ->
Auth_context.Service.make_ap_rep auth_context
|> krb_error
>>=? fun ap_rep ->
Header.Ap_rep.write ~backend ap_rep;
let my_principal = Principal.Cross_realm.name principal in
let client_principal_name = Principal.Cross_realm.name client in
Authorizer.run
~authorize
~acting_as:Server
~my_principal
~peer_address:peer
~peer_principal:client_principal_name
>>= fun authorize_result ->
write_field'
~conn_type
~auth_context
~backend
(Or_error.Stable.V2.bin_writer_t Unit.bin_writer_t)
authorize_result
>>=? fun () ->
read_field' ~conn_type ~auth_context ~backend ~name:"Client ack" Unit.bin_reader_t
>>|? fun () ->
let conn =
Connection.create_server
~conn_type
~auth_context:(`Prod auth_context)
~forwarded_creds_auth_context:(Some forwarded_creds_auth_context)
~backend
~my_principal
~peer_principal:client_principal_name
~protocol_version:(`Versioned this_version)
in
conn, authorize_result
;;
let setup ~accepted_conn_types ~authorize ~principal ~peer endpoint backend =
do_setup ~accepted_conn_types ~authorize ~principal ~peer endpoint backend
>>| function
| Error _ as error -> error
| Ok ((_ : Connection.t), Error (_ : Error.t)) -> Error `Rejected_client
| Ok (conn, Ok ()) -> Ok conn
;;
end
module Client = struct
let setup_client_context ~client_cred_cache ~backend =
let second_ticket, cred_cache_flags, client_context_flags =
match Header.Server.endpoint server_header with
| Service -> None, [], [ Flags.Ap_req.AP_OPTS_MUTUAL_REQUIRED ]
| User_to_user tgt ->
( Some tgt
, [ Flags.Get_credentials.KRB5_GC_USER_USER ]
, [ AP_OPTS_USE_SESSION_KEY; AP_OPTS_MUTUAL_REQUIRED ] )
in
let cred_cache = Client_cred_cache.cred_cache client_cred_cache in
Internal.Cred_cache.principal cred_cache
>>=? fun client ->
Header.Server.principal server_header
|> Principal.Cross_realm.create
>>=? fun server ->
Credentials.create ?second_ticket ~client ~server ()
>>=? fun credentials_request ->
Client_cred_cache.get_credentials
~flags:cred_cache_flags
client_cred_cache
~request:credentials_request
>>=? fun (credentials, `Error_getting_creds_from_default_cache maybe_error) ->
(match maybe_error with
| None -> ()
| Some error ->
Log.Global.sexp
~level:`Info
[%message
"Failed to get credentials from default cache (succeeded with memory \
cache)"
(error : Error.t)
(client_cred_cache : Client_cred_cache.t)]);
let init_auth_context () =
Auth_context.Client.init
client_context_flags
credentials
~local_inet:(Backend.local_inet backend)
~remote_inet:(Backend.remote_inet backend)
in
init_auth_context ()
>>=? fun (auth_context, ap_req) ->
init_auth_context ()
>>|? fun (forwarded_creds_auth_context, forwarded_creds_ap_req) ->
auth_context, ap_req, forwarded_creds_auth_context, forwarded_creds_ap_req
;;
let setup ~client_cred_cache ~accepted_conn_types ~authorize ~peer backend =
Header.Server.read ~backend
>>=? fun ->
Unstable.Conn_type_preference.negotiate
~us:accepted_conn_types
~peer:(Header.Server.accepted_conn_types server_header)
|> return
>>=? fun conn_type ->
debug_log_connection_setup
~peer
~conn_type
~user_to_user:(Mode.is_user_to_user server_header.endpoint)
~acting_as:`Client;
setup_client_context ~client_cred_cache ~backend server_header
>>=? fun ( auth_context
, ap_request
, forwarded_creds_auth_context
, forwarded_creds_ap_request ) ->
let =
Header.Client.Fields.create
~accepted_conn_types
~ap_request
~forwarded_creds_ap_request
in
Header.Client.write ~backend client_header;
Header.Ap_rep.read ~backend
>>=? fun ap_rep ->
Auth_context.Client.read_and_verify_ap_rep auth_context ~ap_rep
>>=? fun () ->
let cred_cache = Client_cred_cache.cred_cache client_cred_cache in
Cred_cache.Cross_realm.principal cred_cache
>>=? fun my_principal ->
let server_principal_name = Header.Server.principal server_header in
Authorizer.run
~authorize
~acting_as:Client
~my_principal
~peer_address:peer
~peer_principal:server_principal_name
>>=? fun () ->
write_field ~conn_type ~auth_context ~backend Unit.bin_writer_t ()
>>=? fun () ->
read_field
~conn_type
~auth_context
~backend
~name:"Server ack"
(Or_error.Stable.V2.bin_reader_t Unit.bin_reader_t)
>>| Or_error.join
>>|? fun () ->
Connection.create_client
~conn_type
~auth_context:(`Prod auth_context)
~forwarded_creds_auth_context:(Some forwarded_creds_auth_context)
~backend
~cred_cache:(Some cred_cache)
~my_principal
~peer_principal:server_principal_name
~protocol_version:(`Versioned this_version)
;;
end
end
module Negotiate = struct
let cross_realm_min_version = V5.this_version
let should_force_cross_realm_min_version principal =
let my_realm = Internal.Principal.realm principal in
not (String.equal my_realm Config.pre_v5_assumed_realm)
;;
let negotiate'
?(override_supported_versions = Header.V1.versions)
?additional_magic_numbers
~backend
principal
=
let force_cross_realm_min_version =
should_force_cross_realm_min_version principal
in
let advertised_versions =
let supported_versions =
if force_cross_realm_min_version
then
List.filter
~f:(fun version -> cross_realm_min_version <= version)
override_supported_versions
else override_supported_versions
in
Protocol_version_header.create_exn
?additional_magic_numbers
()
~protocol:Krb
~supported_versions
in
Backend.write_bin_prot_exn backend Header.V1.bin_writer_t advertised_versions;
read_bin_prot' ~backend ~name:"Version header" Header.V1.bin_reader_t
>>=? fun other_versions ->
Protocol_version_header.negotiate
~allow_legacy_peer:true
~us:advertised_versions
~peer:other_versions
|> Result.map_error ~f:(fun error ->
if force_cross_realm_min_version
then (
match
Protocol_version_header.negotiate
~allow_legacy_peer:true
~us:
(Protocol_version_header.create_exn
()
~protocol:Krb
~supported_versions:override_supported_versions)
~peer:other_versions
with
| Ok _ ->
Error.create_s
[%message
"Failed to negotate Kerberos version. The process is not running in \
the \"pre-v5 realm\" (Config.pre_v5_assumed_realm), and hence a \
minimum version of 5 is forced."
(error : Error.t)]
| Error _ -> error)
else error)
|> Or_error.map ~f:(fun version ->
Debug.log_s (fun () ->
[%message "Negotiated Kerberos version" ~v:(version : int)]);
`Versioned version)
|> return
|> handshake_error ~kind:Incompatible_client
;;
let negotiate ?override_supported_versions ~backend principal =
match%map negotiate' ?override_supported_versions ~backend principal with
| Error (`Handshake_error (_, e)) -> Error e
| Ok _ as res -> res
;;
end
module Server = struct
let handshake_exn
?override_supported_versions
?additional_magic_numbers
~authorize
~accepted_conn_types
~principal
~peer
endpoint
backend
=
Negotiate.negotiate'
?override_supported_versions
?additional_magic_numbers
~backend
principal
>>=? function
| `Versioned 1 ->
V1.Server.setup ~accepted_conn_types ~authorize ~principal ~peer endpoint backend
| `Versioned 2 ->
V2.Server.setup ~accepted_conn_types ~authorize ~principal ~peer endpoint backend
| `Versioned 3 ->
V3.Server.setup
~accepted_conn_types
~authorize
~principal
~wants_forwarded_creds:false
~peer
endpoint
backend
| `Versioned 4 ->
V4.Server.setup ~accepted_conn_types ~authorize ~principal ~peer endpoint backend
| `Versioned 5 ->
V5.Server.setup ~accepted_conn_types ~authorize ~principal ~peer endpoint backend
| `Versioned version ->
let e =
Error.create_s
[%message
"Negotiated protocol version that I don't understand (THIS IS A BUG)"
(version : int)
~i_understand:(Header.V1.versions : int list)]
in
return (Error (handshake_error' ~kind:Incompatible_client e))
;;
let handshake
?override_supported_versions
?additional_magic_numbers
~authorize
~accepted_conn_types
~principal
~peer
endpoint
backend
=
Deferred.Or_error.try_with
~run:`Schedule
~here:[%here]
(fun () ->
handshake_exn
?override_supported_versions
?additional_magic_numbers
~authorize
~accepted_conn_types
~principal
~peer
endpoint
backend)
>>| function
| Error e -> Error (handshake_error' ~kind:Unexpected_exception e)
| Ok (_ as result) -> result
;;
end
module Client = struct
let handshake_exn
?override_supported_versions
~authorize
~client_cred_cache
~accepted_conn_types
~peer
backend
=
let cred_cache = Client_cred_cache.cred_cache client_cred_cache in
Internal.Cred_cache.principal cred_cache
>>=? fun my_principal ->
Negotiate.negotiate ?override_supported_versions ~backend my_principal
>>=? function
| `Versioned 1 ->
V1.Client.setup ~cred_cache ~accepted_conn_types ~authorize ~peer backend
| `Versioned 2 ->
V2.Client.setup ~cred_cache ~accepted_conn_types ~authorize ~peer backend
| `Versioned 3 ->
V3.Client.setup
~cred_cache
~accepted_conn_types
~authorize
~forward_credentials_if_requested:false
~peer
backend
| `Versioned 4 ->
V4.Client.setup ~client_cred_cache ~accepted_conn_types ~authorize ~peer backend
| `Versioned 5 ->
V5.Client.setup ~client_cred_cache ~accepted_conn_types ~authorize ~peer backend
| `Versioned version ->
Deferred.Or_error.error_s
[%message
"Negotiated protocol version that I don't understand (THIS IS A BUG)"
(version : int)
~i_understand:(Header.V1.versions : int list)]
;;
let handshake
?override_supported_versions
~authorize
~client_cred_cache
~accepted_conn_types
~peer
backend
=
Monitor.try_with_join_or_error ~rest:`Raise (fun () ->
handshake_exn
?override_supported_versions
~authorize
~client_cred_cache
~accepted_conn_types
~peer
backend)
;;
end
end