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-rw-r--r--lib/ssl/src/ssl_manager.erl202
1 files changed, 110 insertions, 92 deletions
diff --git a/lib/ssl/src/ssl_manager.erl b/lib/ssl/src/ssl_manager.erl
index 6389ff03f5..a18cb70e2d 100644
--- a/lib/ssl/src/ssl_manager.erl
+++ b/lib/ssl/src/ssl_manager.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2007-2011. All Rights Reserved.
+%% Copyright Ericsson AB 2007-2012. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
@@ -30,9 +30,9 @@
-export([start_link/1, start_link_dist/1,
connection_init/2, cache_pem_file/2,
lookup_trusted_cert/4,
- client_session_id/4, server_session_id/4,
+ new_session_id/1, clean_cert_db/2,
register_session/2, register_session/3, invalidate_session/2,
- invalidate_session/3]).
+ invalidate_session/3, clear_pem_cache/0]).
% Spawn export
-export([init_session_validator/1]).
@@ -56,9 +56,12 @@
-define('24H_in_msec', 8640000).
-define('24H_in_sec', 8640).
+-define(GEN_UNIQUE_ID_MAX_TRIES, 10).
-define(SESSION_VALIDATION_INTERVAL, 60000).
--define(CERTIFICATE_CACHE_CLEANUP, 30000).
+-define(CLEAR_PEM_CACHE, 120000).
-define(CLEAN_SESSION_DB, 60000).
+-define(CLEAN_CERT_DB, 500).
+-define(NOT_TO_BIG, 10).
%%====================================================================
%% API
@@ -82,26 +85,46 @@ start_link_dist(Opts) ->
gen_server:start_link({local, ssl_manager_dist}, ?MODULE, [ssl_manager_dist, Opts], []).
%%--------------------------------------------------------------------
--spec connection_init(string()| {der, list()}, client | server) ->
+-spec connection_init(binary()| {der, list()}, client | server) ->
{ok, certdb_ref(), db_handle(), db_handle()}.
%%
%% Description: Do necessary initializations for a new connection.
%%--------------------------------------------------------------------
+connection_init({der, _} = Trustedcerts, Role) ->
+ call({connection_init, Trustedcerts, Role});
+
+connection_init(<<>> = Trustedcerts, Role) ->
+ call({connection_init, Trustedcerts, Role});
+
connection_init(Trustedcerts, Role) ->
call({connection_init, Trustedcerts, Role}).
+
%%--------------------------------------------------------------------
--spec cache_pem_file(string(), term()) -> {ok, term()} | {error, reason()}.
+-spec cache_pem_file(binary(), term()) -> {ok, term()} | {error, reason()}.
%%
%% Description: Cach a pem file and return its content.
%%--------------------------------------------------------------------
cache_pem_file(File, DbHandle) ->
- try file:read_file_info(File) of
- {ok, #file_info{mtime = LastWrite}} ->
- cache_pem_file(File, LastWrite, DbHandle)
- catch
- _:Reason ->
- {error, Reason}
+ MD5 = crypto:md5(File),
+ case ssl_certificate_db:lookup_cached_pem(DbHandle, MD5) of
+ [Content] ->
+ {ok, Content};
+ [{Content,_}] ->
+ {ok, Content};
+ undefined ->
+ call({cache_pem, {MD5, File}})
end.
+
+%%--------------------------------------------------------------------
+-spec clear_pem_cache() -> ok.
+%%
+%% Description: Clear the PEM cache
+%%--------------------------------------------------------------------
+clear_pem_cache() ->
+ %% Not supported for distribution at the moement, should it be?
+ put(ssl_manager, ssl_manager),
+ call(unconditionally_clear_pem_cache).
+
%%--------------------------------------------------------------------
-spec lookup_trusted_cert(term(), reference(), serialnumber(), issuer()) ->
undefined |
@@ -114,22 +137,15 @@ lookup_trusted_cert(DbHandle, Ref, SerialNumber, Issuer) ->
ssl_certificate_db:lookup_trusted_cert(DbHandle, Ref, SerialNumber, Issuer).
%%--------------------------------------------------------------------
--spec client_session_id(host(), inet:port_number(), #ssl_options{},
- der_cert() | undefined) -> session_id().
+-spec new_session_id(integer()) -> session_id().
%%
-%% Description: Select a session id for the client.
+%% Description: Creates a session id for the server.
%%--------------------------------------------------------------------
-client_session_id(Host, Port, SslOpts, OwnCert) ->
- call({client_session_id, Host, Port, SslOpts, OwnCert}).
+new_session_id(Port) ->
+ call({new_session_id, Port}).
-%%--------------------------------------------------------------------
--spec server_session_id(host(), inet:port_number(), #ssl_options{},
- der_cert()) -> session_id().
-%%
-%% Description: Select a session id for the server.
-%%--------------------------------------------------------------------
-server_session_id(Port, SuggestedSessionId, SslOpts, OwnCert) ->
- call({server_session_id, Port, SuggestedSessionId, SslOpts, OwnCert}).
+clean_cert_db(Ref, File) ->
+ erlang:send_after(?CLEAN_CERT_DB, self(), {clean_cert_db, Ref, File}).
%%--------------------------------------------------------------------
-spec register_session(inet:port_number(), #session{}) -> ok.
@@ -177,6 +193,7 @@ init([Name, Opts]) ->
SessionCache = CacheCb:init(proplists:get_value(session_cb_init_args, Opts, [])),
Timer = erlang:send_after(SessionLifeTime * 1000,
self(), validate_sessions),
+ erlang:send_after(?CLEAR_PEM_CACHE, self(), clear_pem_cache),
{ok, #state{certificate_db = CertDb,
session_cache = SessionCache,
session_cache_cb = CacheCb,
@@ -194,55 +211,44 @@ init([Name, Opts]) ->
%%
%% Description: Handling call messages
%%--------------------------------------------------------------------
-handle_call({{connection_init, "", _Role}, Pid}, _From,
- #state{certificate_db = [CertDb |_],
+handle_call({{connection_init, <<>>, _Role}, _Pid}, _From,
+ #state{certificate_db = [CertDb, FileRefDb, PemChace],
session_cache = Cache} = State) ->
- erlang:monitor(process, Pid),
- Result = {ok, make_ref(),CertDb, Cache},
+ Result = {ok, make_ref(),CertDb, FileRefDb, PemChace, Cache},
{reply, Result, State};
handle_call({{connection_init, Trustedcerts, _Role}, Pid}, _From,
- #state{certificate_db = [CertDb|_] =Db,
+ #state{certificate_db = [CertDb, FileRefDb, PemChace] = Db,
session_cache = Cache} = State) ->
- erlang:monitor(process, Pid),
Result =
try
{ok, Ref} = ssl_certificate_db:add_trusted_certs(Pid, Trustedcerts, Db),
- {ok, Ref, CertDb, Cache}
+ {ok, Ref, CertDb, FileRefDb, PemChace, Cache}
catch
_:Reason ->
{error, Reason}
end,
{reply, Result, State};
-handle_call({{client_session_id, Host, Port, SslOpts, OwnCert}, _}, _,
- #state{session_cache = Cache,
- session_cache_cb = CacheCb} = State) ->
- Id = ssl_session:id({Host, Port, SslOpts}, Cache, CacheCb, OwnCert),
- {reply, Id, State};
-
-handle_call({{server_session_id, Port, SuggestedSessionId, SslOpts, OwnCert}, _},
+handle_call({{new_session_id,Port}, _},
_, #state{session_cache_cb = CacheCb,
- session_cache = Cache,
- session_lifetime = LifeTime} = State) ->
- Id = ssl_session:id(Port, SuggestedSessionId, SslOpts,
- Cache, CacheCb, LifeTime, OwnCert),
+ session_cache = Cache} = State) ->
+ Id = new_id(Port, ?GEN_UNIQUE_ID_MAX_TRIES, Cache, CacheCb),
{reply, Id, State};
-handle_call({{cache_pem, File, LastWrite}, Pid}, _,
+
+handle_call({{cache_pem, File}, _Pid}, _,
#state{certificate_db = Db} = State) ->
- try ssl_certificate_db:cache_pem_file(Pid, File, LastWrite, Db) of
+ try ssl_certificate_db:cache_pem_file(File, Db) of
Result ->
{reply, Result, State}
catch
_:Reason ->
{reply, {error, Reason}, State}
end;
-handle_call({{recache_pem, File, LastWrite}, Pid}, From,
- #state{certificate_db = Db} = State) ->
- ssl_certificate_db:uncache_pem_file(File, Db),
- cast({recache_pem, File, LastWrite, Pid, From}),
- {noreply, State}.
+handle_call({unconditionally_clear_pem_cache, _},_, #state{certificate_db = [_,_,PemChace]} = State) ->
+ ssl_certificate_db:clear(PemChace),
+ {reply, ok, State}.
%%--------------------------------------------------------------------
-spec handle_cast(msg(), #state{}) -> {noreply, #state{}}.
@@ -278,22 +284,7 @@ handle_cast({invalidate_session, Host, Port,
handle_cast({invalidate_session, Port, #session{session_id = ID} = Session},
#state{session_cache = Cache,
session_cache_cb = CacheCb} = State) ->
- invalidate_session(Cache, CacheCb, {Port, ID}, Session, State);
-
-handle_cast({recache_pem, File, LastWrite, Pid, From},
- #state{certificate_db = [_, FileToRefDb, _]} = State0) ->
- case ssl_certificate_db:lookup(File, FileToRefDb) of
- undefined ->
- {reply, Msg, State} =
- handle_call({{cache_pem, File, LastWrite}, Pid}, From, State0),
- gen_server:reply(From, Msg),
- {noreply, State};
- _ -> %% Send message to self letting cleanup messages be handled
- %% first so that no reference to the old version of file
- %% exists when we cache the new one.
- cast({recache_pem, File, LastWrite, Pid, From}),
- {noreply, State0}
- end.
+ invalidate_session(Cache, CacheCb, {Port, ID}, Session, State).
%%--------------------------------------------------------------------
-spec handle_info(msg(), #state{}) -> {noreply, #state{}}.
@@ -318,23 +309,38 @@ handle_info({delayed_clean_session, Key}, #state{session_cache = Cache,
CacheCb:delete(Cache, Key),
{noreply, State};
-handle_info({'EXIT', _, _}, State) ->
- %% Session validator died!! Do we need to take any action?
- %% maybe error log
+handle_info(clear_pem_cache, #state{certificate_db = [_,_,PemChace]} = State) ->
+ case ssl_certificate_db:db_size(PemChace) of
+ N when N < ?NOT_TO_BIG ->
+ ok;
+ _ ->
+ ssl_certificate_db:clear(PemChace)
+ end,
+ erlang:send_after(?CLEAR_PEM_CACHE, self(), clear_pem_cache),
{noreply, State};
-handle_info({'DOWN', _Ref, _Type, _Pid, ecacertfile}, State) ->
- {noreply, State};
-handle_info({'DOWN', _Ref, _Type, Pid, shutdown}, State) ->
- handle_info({remove_trusted_certs, Pid}, State);
-handle_info({'DOWN', _Ref, _Type, Pid, _Reason}, State) ->
- erlang:send_after(?CERTIFICATE_CACHE_CLEANUP, self(),
- {remove_trusted_certs, Pid}),
+handle_info({clean_cert_db, Ref, File},
+ #state{certificate_db = [CertDb,RefDb, PemCache]} = State) ->
+ case ssl_certificate_db:ref_count(Ref, RefDb, 0) of
+ 0 ->
+ MD5 = crypto:md5(File),
+ case ssl_certificate_db:lookup_cached_pem(MD5, PemCache) of
+ [{Content, Ref}] ->
+ ssl_certificate_db:insert(MD5, Content, PemCache);
+ undefined ->
+ ok
+ end,
+ ssl_certificate_db:remove(Ref, RefDb),
+ ssl_certificate_db:remove_trusted_certs(Ref, CertDb);
+ _ ->
+ ok
+ end,
{noreply, State};
-handle_info({remove_trusted_certs, Pid},
- #state{certificate_db = Db} = State) ->
- ssl_certificate_db:remove_trusted_certs(Pid, Db),
+
+handle_info({'EXIT', _, _}, State) ->
+ %% Session validator died!! Do we need to take any action?
+ %% maybe error log
{noreply, State};
handle_info(_Info, State) ->
@@ -406,19 +412,6 @@ session_validation({{Port, _}, Session}, LifeTime) ->
validate_session(Port, Session, LifeTime),
LifeTime.
-cache_pem_file(File, LastWrite, DbHandle) ->
- case ssl_certificate_db:lookup_cached_certs(DbHandle,File) of
- [{_, {Mtime, Content}}] ->
- case LastWrite of
- Mtime ->
- {ok, Content};
- _ ->
- call({recache_pem, File, LastWrite})
- end;
- [] ->
- call({cache_pem, File, LastWrite})
- end.
-
delay_time() ->
case application:get_env(ssl, session_delay_cleanup_time) of
{ok, Time} when is_integer(Time) ->
@@ -448,3 +441,28 @@ last_delay_timer({{_,_},_}, TRef, {LastServer, _}) ->
{LastServer, TRef};
last_delay_timer({_,_}, TRef, {_, LastClient}) ->
{TRef, LastClient}.
+
+%% If we can not generate a not allready in use session ID in
+%% ?GEN_UNIQUE_ID_MAX_TRIES we make the new session uncacheable The
+%% value of ?GEN_UNIQUE_ID_MAX_TRIES is stolen from open SSL which
+%% states : "If we can not find a session id in
+%% ?GEN_UNIQUE_ID_MAX_TRIES either the RAND code is broken or someone
+%% is trying to open roughly very close to 2^128 (or 2^256) SSL
+%% sessions to our server"
+new_id(_, 0, _, _) ->
+ <<>>;
+new_id(Port, Tries, Cache, CacheCb) ->
+ Id = crypto:rand_bytes(?NUM_OF_SESSION_ID_BYTES),
+ case CacheCb:lookup(Cache, {Port, Id}) of
+ undefined ->
+ Now = calendar:datetime_to_gregorian_seconds({date(), time()}),
+ %% New sessions can not be set to resumable
+ %% until handshake is compleate and the
+ %% other session values are set.
+ CacheCb:update(Cache, {Port, Id}, #session{session_id = Id,
+ is_resumable = false,
+ time_stamp = Now}),
+ Id;
+ _ ->
+ new_id(Port, Tries - 1, Cache, CacheCb)
+ end.