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-rw-r--r--lib/ssl/doc/src/ssl.xml23
-rw-r--r--lib/ssl/src/ssl.erl15
-rw-r--r--lib/ssl/src/ssl_connection.erl39
-rw-r--r--lib/ssl/src/ssl_handshake.erl14
-rw-r--r--lib/ssl/src/ssl_tls1.erl2
5 files changed, 88 insertions, 5 deletions
diff --git a/lib/ssl/doc/src/ssl.xml b/lib/ssl/doc/src/ssl.xml
index 50268ae206..d9f10a8c4c 100644
--- a/lib/ssl/doc/src/ssl.xml
+++ b/lib/ssl/doc/src/ssl.xml
@@ -122,6 +122,9 @@
<p> <c>hash() = md5 | sha
</c></p>
+ <p><c>prf_random() = client_random | server_random
+ </c></p>
+
</section>
<section>
@@ -561,6 +564,26 @@ fun(OtpCert :: #'OTPCertificate'{}, Event :: {bad_cert, Reason :: atom()} |
</func>
<func>
+ <name>prf(Socket, Secret, Label, Seed, WantedLength) -> {ok, binary()} | {error, reason()}</name>
+ <fsummary>Use a sessions pseudo random function to generate key material.</fsummary>
+ <type>
+ <v>Socket = sslsocket()</v>
+ <v>Secret = binary() | master_secret</v>
+ <v>Label = binary()</v>
+ <v>Seed = [binary() | prf_random()]</v>
+ <v>WantedLength = non_neg_integer()</v>
+ </type>
+ <desc>
+ <p>Use the pseudo random function (PRF) of a TLS session to generate
+ additional key material. It either takes user generated values for
+ <c>Secret</c> and <c>Seed</c> or atoms directing it use a specific
+ value from the session security parameters.</p>
+ <p>This function can only be used with TLS connections, <c>{error, undefined}</c>
+ is returned for SSLv3 connections.</p>
+ </desc>
+ </func>
+
+ <func>
<name>renegotiate(Socket) -> ok | {error, Reason}</name>
<fsummary> Initiates a new handshake.</fsummary>
<type>
diff --git a/lib/ssl/src/ssl.erl b/lib/ssl/src/ssl.erl
index d0693445e0..1048583eca 100644
--- a/lib/ssl/src/ssl.erl
+++ b/lib/ssl/src/ssl.erl
@@ -30,7 +30,7 @@
controlling_process/2, listen/2, pid/1, peername/1, peercert/1,
recv/2, recv/3, send/2, getopts/2, setopts/2, sockname/1,
versions/0, session_info/1, format_error/1,
- renegotiate/1]).
+ renegotiate/1, prf/5]).
-deprecated({pid, 1, next_major_release}).
@@ -67,7 +67,7 @@
-type ssl_imp() :: new | old.
-type transport_option() :: {cb_info, {CallbackModule::atom(), DataTag::atom(), ClosedTag::atom()}}.
-
+-type prf_random() :: client_random | server_random.
%%--------------------------------------------------------------------
-spec start() -> ok | {error, reason()}.
@@ -414,6 +414,17 @@ versions() ->
renegotiate(#sslsocket{pid = Pid, fd = new_ssl}) ->
ssl_connection:renegotiation(Pid).
+%%--------------------------------------------------------------------
+-spec prf(#sslsocket{}, binary() | 'master_secret', binary(),
+ binary() | prf_random(), non_neg_integer()) ->
+ {ok, binary()} | {error, reason()}.
+%%
+%% Description: use a ssl sessions TLS PRF to generate key material
+%%--------------------------------------------------------------------
+prf(#sslsocket{pid = Pid, fd = new_ssl},
+ Secret, Label, Seed, WantedLength) ->
+ ssl_connection:prf(Pid, Secret, Label, Seed, WantedLength).
+
%%---------------------------------------------------------------
-spec format_error({error, term()}) -> list().
%%
diff --git a/lib/ssl/src/ssl_connection.erl b/lib/ssl/src/ssl_connection.erl
index 28dd0c85d0..59133dccf0 100644
--- a/lib/ssl/src/ssl_connection.erl
+++ b/lib/ssl/src/ssl_connection.erl
@@ -40,7 +40,8 @@
-export([send/2, recv/3, connect/7, ssl_accept/6, handshake/2,
socket_control/3, close/1, shutdown/2,
new_user/2, get_opts/2, set_opts/2, info/1, session_info/1,
- peer_certificate/1, sockname/1, peername/1, renegotiation/1]).
+ peer_certificate/1, sockname/1, peername/1, renegotiation/1,
+ prf/5]).
%% Called by ssl_connection_sup
-export([start_link/7]).
@@ -273,6 +274,16 @@ peer_certificate(ConnectionPid) ->
renegotiation(ConnectionPid) ->
sync_send_all_state_event(ConnectionPid, renegotiate).
+%%--------------------------------------------------------------------
+-spec prf(pid(), binary() | 'master_secret', binary(),
+ binary() | ssl:prf_secret(), non_neg_integer()) ->
+ {ok, binary()} | {error, reason()} | {'EXIT', term()}.
+%%
+%% Description: use a ssl sessions TLS PRF to generate key material
+%%--------------------------------------------------------------------
+prf(ConnectionPid, Secret, Label, Seed, WantedLength) ->
+ sync_send_all_state_event(ConnectionPid, {prf, Secret, Label, Seed, WantedLength}).
+
%%====================================================================
%% ssl_connection_sup API
%%====================================================================
@@ -868,6 +879,32 @@ handle_sync_event(renegotiate, From, connection, State) ->
handle_sync_event(renegotiate, _, StateName, State) ->
{reply, {error, already_renegotiating}, StateName, State, get_timeout(State)};
+handle_sync_event({prf, Secret, Label, Seed, WantedLength}, _, StateName,
+ #state{connection_states = ConnectionStates,
+ negotiated_version = Version} = State) ->
+ ConnectionState =
+ ssl_record:current_connection_state(ConnectionStates, read),
+ SecParams = ConnectionState#connection_state.security_parameters,
+ #security_parameters{master_secret = MasterSecret,
+ client_random = ClientRandom,
+ server_random = ServerRandom} = SecParams,
+ Reply = try
+ SecretToUse = case Secret of
+ _ when is_binary(Secret) -> Secret;
+ master_secret -> MasterSecret
+ end,
+ SeedToUse = lists:reverse(
+ lists:foldl(fun(X, Acc) when is_binary(X) -> [X|Acc];
+ (client_random, Acc) -> [ClientRandom|Acc];
+ (server_random, Acc) -> [ServerRandom|Acc]
+ end, [], Seed)),
+ ssl_handshake:prf(Version, SecretToUse, Label, SeedToUse, WantedLength)
+ catch
+ exit:_ -> {error, badarg};
+ error:Reason -> {error, Reason}
+ end,
+ {reply, Reply, StateName, State, get_timeout(State)};
+
handle_sync_event(info, _, StateName,
#state{negotiated_version = Version,
session = #session{cipher_suite = Suite}} = State) ->
diff --git a/lib/ssl/src/ssl_handshake.erl b/lib/ssl/src/ssl_handshake.erl
index 542033e6ce..ef60cac6df 100644
--- a/lib/ssl/src/ssl_handshake.erl
+++ b/lib/ssl/src/ssl_handshake.erl
@@ -37,7 +37,7 @@
finished/4, verify_connection/5, get_tls_handshake/2,
decode_client_key/3, server_hello_done/0,
encode_handshake/2, init_hashes/0, update_hashes/2,
- decrypt_premaster_secret/2]).
+ decrypt_premaster_secret/2, prf/5]).
-export([dec_hello_extensions/2]).
@@ -543,6 +543,18 @@ server_key_exchange_hash(dhe_dss, Value) ->
crypto:sha(Value).
%%--------------------------------------------------------------------
+-spec prf(tls_version(), binary(), binary(), binary(), non_neg_integer()) ->
+ {ok, binary()} | {error, undefined}.
+%%
+%% Description: use the TLS PRF to generate key material
+%%--------------------------------------------------------------------
+prf({3,0}, _, _, _, _) ->
+ {error, undefined};
+prf({3,N}, Secret, Label, Seed, WantedLength)
+ when N == 1; N == 2 ->
+ {ok, ssl_tls1:prf(Secret, Label, Seed, WantedLength)}.
+
+%%--------------------------------------------------------------------
%%% Internal functions
%%--------------------------------------------------------------------
get_tls_handshake_aux(<<?BYTE(Type), ?UINT24(Length),
diff --git a/lib/ssl/src/ssl_tls1.erl b/lib/ssl/src/ssl_tls1.erl
index 5f9850c386..7351f34b61 100644
--- a/lib/ssl/src/ssl_tls1.erl
+++ b/lib/ssl/src/ssl_tls1.erl
@@ -29,7 +29,7 @@
-include("ssl_record.hrl").
-export([master_secret/3, finished/3, certificate_verify/2, mac_hash/7,
- setup_keys/6, suites/0]).
+ setup_keys/6, suites/0, prf/4]).
%%====================================================================
%% Internal application API
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 08:07:45 +0000