File 3722-ssl-Enable-certs_keys-config.patch of Package erlang

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File 3722-ssl-Enable-certs_keys-config.patch of Package erlang (Revision 1fca9f2f48345e43a61098f600f2b10f)

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From c38aed90932536aca8da4829284dd9143383468a Mon Sep 17 00:00:00 2001
From: Ingela Anderton Andin <ingela@erlang.org>
Date: Wed, 16 Feb 2022 11:04:47 +0100
Subject: [PATCH 2/2] ssl: Enable certs_keys config

Closes GH-4143
---
 lib/ssl/doc/src/ssl.xml             |  42 +++++-
 lib/ssl/doc/src/using_ssl.xml       | 155 ++++++++++++-------
 lib/ssl/src/dtls_connection.erl     |  10 +-
 lib/ssl/src/ssl.erl                 |  20 ++-
 lib/ssl/src/ssl_certificate.erl     |  34 ++++-
 lib/ssl/src/ssl_config.erl          | 193 +++++++++++++++++++++---
 lib/ssl/src/ssl_connection.hrl      |   9 +-
 lib/ssl/src/ssl_gen_statem.erl      |   8 +-
 lib/ssl/src/ssl_handshake.erl       |  22 ++-
 lib/ssl/src/ssl_internal.hrl        |   1 +
 lib/ssl/src/tls_connection.erl      |  10 +-
 lib/ssl/src/tls_dtls_connection.erl |   5 +-
 lib/ssl/src/tls_handshake_1_3.erl   |   7 +-
 lib/ssl/test/ssl_api_SUITE.erl      | 222 ++++++++++++++++++++++++++++
 lib/ssl/test/ssl_test_lib.erl       |   1 +
 15 files changed, 637 insertions(+), 102 deletions(-)

diff --git a/lib/ssl/doc/src/ssl.xml b/lib/ssl/doc/src/ssl.xml
index 495f4426fa..3d3cc28a47 100644
--- a/lib/ssl/doc/src/ssl.xml
+++ b/lib/ssl/doc/src/ssl.xml
@@ -356,13 +356,53 @@
 </datatype>
 
 <datatype>
- <name name="key_password"/>
+ <name name="key_pem_password"/>
 <desc>
 	String containing the user's password or a function returning same type. Only used if the
 	private keyfile is password-protected.
 </desc>
 </datatype>
 
+ <datatype>
+ <name name="certs_keys"/>
+ <desc>
+	A list of a certificate (or possible a certificate and its
+	chain) and the associated key of the certificate, that may be
+	used to authenticate the client or the server. The
+	certificate key pair that is considered best and matches
+	negotiated parameters for the connection will be selected.
+	Different signature algorithms are prioritized in the order
+	<c> eddsa, ecdsa, rsa_pss_pss, rsa and dsa </c>. If more than
+	one key is supplied for the same signing algorithm (which is
+	probably an unusual use case) they will prioritized by
+	strength unless it is a so called <c>engine key</c> that will
+	be favoured over other keys. As engine keys cannot be
+	inspected, supplying more than one engine key will make no
+	sense. This offers flexibility to for instance configure a
+	newer certificate that is expected to be used in most cases
+	and an older but acceptable certificate that will only be used
+	to communicate with legacy systems. Note that there is a trade
+	off between the induced overhead and the flexibility so
+	alternatives should be chosen for good reasons. If the <c>certs_keys</c> option is specified it
+	overrides all single certificate and key options. For examples see <seeguide marker="ssl:using_ssl"> the Users Guide</seeguide>
+	
+
+	<note> <c>eddsa</c> certificates are only supported by TLS-1.3 that does not support <c>dsa</c> certificates.
+	 <c>rsa_pss_pss</c> (RSA certificates using Probabilistic Signature Scheme) are supported in TLS-1.2 and TLS-1.3, but some
+	TLS-1.2 implementations may not support <c>rsa_pss_pss</c>.
+	</note>
+ </desc>
+ </datatype>
+
+ <datatype>
+ <name name="cert_key_conf"/>
+ <desc>
+	 A certificate (or possibly a certificate and its chain) and its associated key on one of the
+	possible formats. For the PEM file format there may also be a password associated with the file containg the key.
+	
+ </desc>
+ </datatype>
+
 <datatype>
 <name name="cipher_suites"/>
 <desc>
diff --git a/lib/ssl/doc/src/using_ssl.xml b/lib/ssl/doc/src/using_ssl.xml
index ae082b98db..559b20dedd 100644
--- a/lib/ssl/doc/src/using_ssl.xml
+++ b/lib/ssl/doc/src/using_ssl.xml
@@ -36,22 +36,26 @@
 <seemfa marker="ssl:ssl#versions/0"><c>ssl:versions/0</c></seemfa>
 .
 
- To see all supported cipher suites, call
- <seemfa marker="ssl:ssl#cipher_suites/2"><c>ssl:cipher_suites(all, 'tlsv1.3')</c> </seemfa>. 
- The available cipher suites for a connection depend on the TLS version and pre TLS-1.3 also
- on the certificate. To see the default cipher suite list change <c>all</c> to <c>default</c>. 
- Note that TLS 1.3 and previous versions does not have any cipher suites in common,
- for listing cipher suites for a specific version use
- <seemfa marker="ssl:ssl#cipher_suites/2"><c>ssl:cipher_suites(exclusive, 'tlsv1.3')</c> </seemfa>. 
- Specific cipher suites that you want your connection to use can also be 
- specified. Default is to use the strongest available.
+ To see all supported cipher suites, call <seemfa
+ marker="ssl:ssl#cipher_suites/2"><c>ssl:cipher_suites(all,
+ 'tlsv1.3')</c> </seemfa>. The available cipher suites for a
+ connection depend on the TLS version and pre TLS-1.3 also on the
+ certificate. To see the default cipher suite list change <c>all</c>
+ to <c>default</c>. Note that TLS 1.3 and previous versions does not
+ have any cipher suites in common, for listing cipher suites for a
+ specific version use <seemfa
+ marker="ssl:ssl#cipher_suites/2"><c>ssl:cipher_suites(exclusive,
+ 'tlsv1.3')</c> </seemfa>. Specific cipher suites that you want your
+ connection to use can also be specified. Default is to use the
+ strongest available.
 
 <section>
 <title>Setting up Connections</title>
 
- This section shows a small example of how to set up client/server connections
- using the Erlang shell. The returned value of the <c>sslsocket</c> is abbreviated
- with <c>[...]</c> as it can be fairly large and is opaque.
+ This section shows a small example of how to set up
+ client/server connections using the Erlang shell. The returned
+ value of the <c>sslsocket</c> is abbreviated with <c>[...]</c> as
+ it can be fairly large and is opaque.
 
 <section>
 <title>Minimal Example</title>
@@ -67,8 +71,19 @@ ok</code>
 
 Step 2: Create a TLS listen socket: (To run DTLS add the option {protocol, dtls})
 <code type="erl">2 server> {ok, ListenSocket} =
-ssl:listen(9999, [{certfile, "cert.pem"}, {keyfile, "key.pem"},{reuseaddr, true}]).
+ssl:listen(9999, [{certfile, "cert.pem"},
+ {keyfile, "key.pem"},
+ {reuseaddr, true}]).
 {ok,{sslsocket, [...]}}</code>
+
+
+ Step 2: From OTP-25 it is equivalent to 
+ <code type="erl">2 server> {ok, ListenSocket} =
+ssl:listen(9999, [{certs_keys, [#{certfile => "cert.pem",
+ keyfile => "key.pem"}],
+ {reuseaddr, true}]).
+{ok,{sslsocket, [...]}}</code>
+
 
 Step 3: Do a transport accept on the TLS listen socket:
 <code type="erl">3 server> {ok, TLSTransportSocket} = ssl:transport_accept(ListenSocket).
@@ -134,9 +149,11 @@ ok</code>
 
 <code type="erl">2 client> {ok, Socket} = gen_tcp:connect("localhost", 9999, [], infinity).</code>
 
- Step 5: Ensure <c>active</c> is set to <c>false</c> before trying
- to upgrade a connection to a TLS connection, otherwise
- TLS handshake messages can be delivered to the wrong process:
+ Step 5: Ensure <c>active</c> is set to <c>false</c>
+ before trying to upgrade a connection to a TLS connection,
+ otherwise TLS handshake messages can be delivered to the wrong
+ process:
+
 <code type="erl">4 server> inet:setopts(Socket, [{active, false}]).
 ok</code>
 
@@ -145,9 +162,11 @@ ok</code>
 {certfile, "cert.pem"}, {keyfile, "key.pem"}]).
 {ok,{sslsocket,[...]}}</code>
 
- Step 7: Upgrade to a TLS connection. The client and server
- must agree upon the upgrade. The server must call
- <c>ssl:handshake/2</c> before the client calls <c>ssl:connect/3.</c>
+ Step 7: Upgrade to a TLS connection. The client and
+ server must agree upon the upgrade. The server must call
+ <c>ssl:handshake/2</c> before the client calls
+ <c>ssl:connect/3.</c>
+
 <code type="erl">3 client>{ok, TLSSocket} = ssl:connect(Socket, [{cacertfile, "cacerts.pem"},
 {certfile, "cert.pem"}, {keyfile, "key.pem"}], infinity).
 {ok,{sslsocket,[...]}}</code>
@@ -160,8 +179,9 @@ ok</code>
 <code type="erl">4 server> ssl:setopts(TLSSocket, [{active, true}]).
 ok</code>
 
- Step 10: Flush the shell message queue to see that the message
- was sent on the client side:
+ Step 10: Flush the shell message queue to see that
+ the message was sent on the client side:
+
 <code type="erl">5 server> flush().
 Shell got {ssl,{sslsocket,[...]},"foo"}
 ok</code>
@@ -173,6 +193,7 @@ ok</code>
 
 Fetch default cipher suite list for a TLS/DTLS version. Change default
 to all to get all possible cipher suites.
+
 <code type="erl">1> Default = ssl:cipher_suites(default, 'tlsv1.2').
 [#{cipher => aes_256_gcm,key_exchange => ecdhe_ecdsa,
 mac => aead,prf => sha384}, ....]
@@ -183,7 +204,8 @@ ok</code>
 <code type="erl">2> NoRSA =
 ssl:filter_cipher_suites(Default,
 [{key_exchange, fun(rsa) -> false;
-			 (_) -> true end}]).
+			 (_) -> true
+			 end}]).
 [...]
 </code>
 
@@ -191,9 +213,11 @@ ok</code>
 <code type="erl"> 3> Suites =
 ssl:filter_cipher_suites(Default,
 [{key_exchange, fun(ecdh_ecdsa) -> true;
-			 (_) -> false end},
- {cipher, fun(aes_128_cbc) ->true;
-			 (_) ->false end}]).
+			 (_) -> false
+			 end},
+ {cipher, fun(aes_128_cbc) -> true;
+			 (_) ->false
+			 end}]).
 [#{cipher => aes_128_cbc,key_exchange => ecdh_ecdsa,
 mac => sha256,prf => sha256},
 #{cipher => aes_128_cbc,key_exchange => ecdh_ecdsa,mac => sha,
@@ -226,7 +250,8 @@ ok</code>
 
 <code type="erl">2> {ok, EngineRef} =
 crypto:engine_load(&lt;&lt;"dynamic">>,
- [{&lt;&lt;"SO_PATH">>, "/tmp/user/engines/MyEngine"},&lt;&lt;"LOAD">>],[]).
+[{&lt;&lt;"SO_PATH">>, "/tmp/user/engines/MyEngine"},&lt;&lt;"LOAD">>],
+[]).
 {ok,#Ref&lt;0.2399045421.3028942852.173962>}
 </code>
 
@@ -251,24 +276,23 @@ ssl:connect("localhost", 9999,
 
 <section>
 <title>Session Reuse pre TLS 1.3</title>
- Clients can request to reuse a session established
- by a previous full handshake between that client and server by
- sending the id of the session in the initial handshake
- message. The server may or may not agree to reuse it. If agreed
- the server will send back the id and if not it will send a new
- id. The ssl application has several options for handling session
- reuse.
+ Clients can request to reuse a session established by a
+ previous full handshake between that client and server by sending
+ the id of the session in the initial handshake message. The server
+ may or may not agree to reuse it. If agreed the server will send
+ back the id and if not it will send a new id. The ssl application
+ has several options for handling session reuse.
 
 On the client side the ssl application will save session data
 to try to automate session reuse on behalf of the client processes
- on the Erlang node. Note that only verified sessions will be
- saved for security reasons, that is session resumption relies on
- the certificate validation to have been run in the original
+ on the Erlang node. Note that only verified sessions will be saved
+ for security reasons, that is session resumption relies on the
+ certificate validation to have been run in the original
 handshake. To minimize memory consumption only unique sessions
 will be saved unless the special <c>save</c> value is specified
 for the following option <c> {reuse_sessions, boolean() |
- save}</c> in which case a full handshake will be performed and that
- specific session will have been saved before the handshake
+ save}</c> in which case a full handshake will be performed and
+ that specific session will have been saved before the handshake
 returns. The session id and even an opaque binary containing the
 session data can be retrieved using
 <c>ssl:connection_information/1</c> function. A saved session
@@ -320,7 +344,8 @@ ok
 Step 2- Using <c>save</c> Option 
 
 <code type="erl">
-%% We want save this particular session for reuse although it has the same basis as C1
+%% We want save this particular session for
+%% reuse although it has the same basis as C1
 6&gt; {ok, C3} = ssl:connect("localhost", 9999, [{verify, verify_peer},
 					 {versions, ['tlsv1.2']},
 					 {cacertfile, "cacerts.pem"},
@@ -365,11 +390,12 @@ ok
 
 <code type="erl">
 %% Perform a full handshake and the session will not be saved for reuse
-12&gt; {ok, C9} = ssl:connect("localhost", 9999, [{verify, verify_peer},
-				 {versions, ['tlsv1.2']},
-		 {cacertfile, "cacerts.pem"},
-					 {reuse_sessions, false},
-					 {server_name_indication, disable}]).
+12&gt; {ok, C9} =
+ssl:connect("localhost", 9999, [{verify, verify_peer},
+				{versions, ['tlsv1.2']},
+		 {cacertfile, "cacerts.pem"},
+ {reuse_sessions, false},
+	 {server_name_indication, disable}]).
 {ok,{sslsocket,{gen_tcp,#Port&lt;0.14&gt;,tls_connection, ...}}
 
 %% Fetch session ID and data for C9 connection
@@ -451,7 +477,11 @@ ok
 
 An example with automatic and manual session resumption:
 
- Step 1 (server): Start the server:
+
+ Step 1 (server): Start the server: Note that from OTP-25 the
+ options certfile and keyfile can be replaced by
+ [{certs_keys, [#{certfile => "cert.pem", keyfile => "key.pem"}]}]
+
 <code type="erl">
 {ok, _} = application:ensure_all_started(ssl).
 LOpts = [{certfile, "cert.pem"},
@@ -462,6 +492,27 @@ ok
 {ok, CSock} = ssl:transport_accept(LSock).
 </code>
 
+
+ Step 1 (server): with alternative certificates,
+ in this example the EDDSA certificate will be preferred if TLS-1.3
+ is negotiated and the RSA certificate will always be used for TLS-1.2
+ as it does not support the EDDSA algorithm: Added in OTP-25
+
+ <code type="erl">
+ {ok, _} = application:ensure_all_started(ssl).
+ LOpts = [{certs_keys, [#{certfile => "eddsacert.pem",
+ keyfile => "eddsakey.pem"},
+			 #{certfile => "rsacert.pem",
+ keyfile => "rsakey.pem",
+			 password => "foobar"}
+			 ]}],
+ {versions, ['tlsv1.2','tlsv1.3']},
+ {session_tickets, stateless}].
+ {ok, LSock} = ssl:listen(8001, LOpts).
+ {ok, CSock} = ssl:transport_accept(LSock).
+ </code>
+
+
 Step 2 (client): Start the client and connect to server:
 <code type="erl">
 {ok, _} = application:ensure_all_started(ssl).
@@ -490,8 +541,9 @@ ok
 <![CDATA[<<<]]> Post-Handshake, NewSessionTicket ...
 </code>
 
- At this point the client has stored the received session tickets and ready to use them when
- establishing new connections to the same server.
+ At this point the client has stored the received session
+ tickets and ready to use them when establishing new connections to
+ the same server.
 
 Step 4 (server): Accept a new connection on the server:
 <code type="erl">
@@ -530,7 +582,7 @@ ok
 Step 8 (client): Make a new connection to server:
 <code type="erl">
 {ok, _} = application:ensure_all_started(ssl).
- COpts2 = [{cacertfile, "cert.pem"},
+ COpts2 = [{cacertfile, "cacerts.pem"},
 {versions, ['tlsv1.2','tlsv1.3']},
 {log_level, debug},
 {session_tickets, manual}].
@@ -542,8 +594,8 @@ ok
 ssl:handshake(CSock3).
 </code>
 
- After the handshake is performed, the user process receives messages with the tickets
- sent by the server.
+ After the handshake is performed, the user process receivess
+ messages with the tickets sent by the server.
 
 Step 10 (client): Receive a new session ticket:
 <code type="erl">
@@ -641,7 +693,8 @@ ok
 
 %% Wait for session tickets
 	timer:sleep(500),
-	%% Close socket if server cannot handle multiple connections e.g. openssl s_server
+	%% Close socket if server cannot handle multiple
+ %% connections e.g. openssl s_server
 	ssl:close(Sock0),
 
 %% Second handshake 0-RTT
diff --git a/lib/ssl/src/dtls_connection.erl b/lib/ssl/src/dtls_connection.erl
index 65076994f9..b3e510c05d 100644
--- a/lib/ssl/src/dtls_connection.erl
+++ b/lib/ssl/src/dtls_connection.erl
@@ -208,13 +208,14 @@ initial_hello({call, From}, {start, Timeout},
 session_cache_cb = CacheCb},
 protocol_specific = PS,
 handshake_env = #handshake_env{renegotiation = {Renegotiation, _}},
- connection_env = #connection_env{cert_key_pairs = CertKeyPairs} = CEnv,
+ connection_env = #connection_env{cert_key_alts = CertKeyAlts} = CEnv,
 	 ssl_options = #{versions := Versions} = SslOpts,
 	 session = Session0,
 	 connection_states = ConnectionStates0
 	 } = State0) ->
 Packages = maps:get(active_n, PS),
 dtls_socket:setopts(Transport, Socket, [{active,Packages}]),
+ CertKeyPairs = ssl_certificate:available_cert_key_pairs(CertKeyAlts),
 Session = ssl_session:client_select_session({Host, Port, SslOpts}, Cache, CacheCb, Session0, CertKeyPairs),
 Hello = dtls_handshake:client_hello(Host, Port, ConnectionStates0, SslOpts,
 					Session#session.session_id, Renegotiation),
@@ -516,13 +517,14 @@ connection(internal, #hello_request{}, #state{static_env = #static_env{host = Ho
 session_cache_cb = CacheCb
 },
 handshake_env = #handshake_env{renegotiation = {Renegotiation, _}},
- connection_env = #connection_env{cert_key_pairs = CertKeyPairs} = CEnv,
+ connection_env = #connection_env{cert_key_alts = CertKeyAlts} = CEnv,
 session = Session0,
 ssl_options = #{versions := Versions} = SslOpts,
 connection_states = ConnectionStates0,
 protocol_specific = PS
 } = State0) ->
 #{current_cookie_secret := Cookie} = PS,
+ CertKeyPairs = ssl_certificate:available_cert_key_pairs(CertKeyAlts),
 Session = ssl_session:client_select_session({Host, Port, SslOpts}, Cache, CacheCb, Session0, CertKeyPairs),
 Hello = dtls_handshake:client_hello(Host, Port, Cookie, ConnectionStates0, SslOpts,
 					Session#session.session_id, Renegotiation, undefined),
@@ -681,14 +683,14 @@ handle_client_hello(#client_hello{client_version = ClientVersion} = Hello, State
 handshake_env = #handshake_env{kex_algorithm = KeyExAlg,
 renegotiation = {Renegotiation, _},
 negotiated_protocol = CurrentProtocol} = HsEnv,
- connection_env = #connection_env{cert_key_pairs = CertKeyPairs} = CEnv,
+ connection_env = #connection_env{cert_key_alts = CertKeyAlts} = CEnv,
 session = Session0,
 ssl_options = SslOpts} =
 tls_dtls_connection:handle_sni_extension(State0, Hello),
 SessionTracker = proplists:get_value(session_id_tracker, Trackers),
 {Version, {Type, Session}, ConnectionStates, Protocol0, ServerHelloExt, HashSign} =
 dtls_handshake:hello(Hello, SslOpts, {SessionTracker, Session0,
- ConnectionStates0, CertKeyPairs, KeyExAlg}, Renegotiation),
+ ConnectionStates0, CertKeyAlts, KeyExAlg}, Renegotiation),
 Protocol = case Protocol0 of
 undefined -> CurrentProtocol;
 _ -> Protocol0
diff --git a/lib/ssl/src/ssl.erl b/lib/ssl/src/ssl.erl
index 83e5b5d942..e151c785e6 100644
--- a/lib/ssl/src/ssl.erl
+++ b/lib/ssl/src/ssl.erl
@@ -311,7 +311,8 @@
 {certfile, cert_pem()} |
 {key, key()} |
 {keyfile, key_pem()} |
- {password, key_password()} |
+ {password, key_pem_password()} |
+ {certs_keys, certs_keys()} |
 {ciphers, cipher_suites()} |
 {eccs, [named_curve()]} |
 {signature_algs, signature_algs()} |
@@ -350,8 +351,14 @@
 key_id := crypto:key_id(), 
 password => crypto:password()}. % exported
 -type key_pem() :: file:filename().
--type key_password() :: iodata() | fun(() -> iodata()).
--type cipher_suites() :: ciphers(). 
+-type key_pem_password() :: iodata() | fun(() -> iodata()).
+-type certs_keys() :: [cert_key_conf()].
+-type cert_key_conf() :: #{cert => cert(),
+ key => key(),
+ certfile => cert_pem(),
+ keyfile => key_pem(),
+ password => key_pem_password()}.
+-type cipher_suites() :: ciphers().
 -type ciphers() :: [erl_cipher_suite()] |
 string(). % (according to old API) exported
 -type cipher_filters() :: list({key_exchange | cipher | mac | prf,
@@ -1756,6 +1763,11 @@ handle_option(password = Option, unbound, OptionsMap, #{rules := Rules}) ->
 handle_option(password = Option, Value0, OptionsMap, _Env) ->
 Value = validate_option(Option, Value0),
 OptionsMap#{password => Value};
+handle_option(certs_keys, unbound, OptionsMap, _Env) ->
+ OptionsMap;
+handle_option(certs_keys = Option, Value0, OptionsMap, _Env) ->
+ Value = validate_option(Option, Value0),
+ OptionsMap#{certs_keys => Value};
 handle_option(psk_identity = Option, unbound, OptionsMap, #{rules := Rules}) ->
 Value = validate_option(Option, default_value(Option, Rules)),
 OptionsMap#{Option => Value};
@@ -2308,6 +2320,8 @@ validate_option(password, Value, _)
 validate_option(password, Value, _)
 when is_function(Value, 0) ->
 Value;
+validate_option(certs_keys, Value, _) when is_list(Value) ->
+ Value;
 validate_option(protocol, Value = tls, _) ->
 Value;
 validate_option(protocol, Value = dtls, _) ->
diff --git a/lib/ssl/src/ssl_certificate.erl b/lib/ssl/src/ssl_certificate.erl
index eef6aa875a..05162c34d6 100644
--- a/lib/ssl/src/ssl_certificate.erl
+++ b/lib/ssl/src/ssl_certificate.erl
@@ -80,7 +80,9 @@
 public_key_type/1,
 foldl_db/3,
 find_cross_sign_root_paths/4,
- handle_cert_auths/4
+ handle_cert_auths/4,
+ available_cert_key_pairs/1,
+ available_cert_key_pairs/2
 	]).
 
 %%====================================================================
@@ -326,6 +328,36 @@ handle_cert_auths([_ | Certs] = EChain, CertAuths, _, _) ->
 {error, EChain, not_in_auth_domain}
 end.
 
+available_cert_key_pairs(CertKeyGroups) ->
+ %% To be able to find possible TLS session pre TLS-1.3
+ %% that may be reused. At this point the version is
+ %% not negotiated.
+ RevAlgos = [dsa, rsa, rsa_pss_pss, ecdsa],
+ cert_key_group_to_list(RevAlgos, CertKeyGroups, []).
+
+%% Create the prioritized list of cert key pairs that
+%% are availble for use in the negotiated version
+available_cert_key_pairs(CertKeyGroups, {3, 4}) ->
+ RevAlgos = [rsa, rsa_pss_pss, ecdsa, eddsa],
+ cert_key_group_to_list(RevAlgos, CertKeyGroups, []);
+available_cert_key_pairs(CertKeyGroups, {3, 3}) ->
+ RevAlgos = [dsa, rsa, rsa_pss_pss, ecdsa],
+ cert_key_group_to_list(RevAlgos, CertKeyGroups, []);
+available_cert_key_pairs(CertKeyGroups, {3, N}) when N < 3->
+ RevAlgos = [dsa, rsa, ecdsa],
+ cert_key_group_to_list(RevAlgos, CertKeyGroups, []).
+
+cert_key_group_to_list([], _, Acc) ->
+ final_group_list(Acc);
+cert_key_group_to_list([Algo| Rest], CertKeyGroups, Acc) ->
+ CertKeyPairs = maps:get(Algo, CertKeyGroups, []),
+ cert_key_group_to_list(Rest, CertKeyGroups, CertKeyPairs ++ Acc).
+
+final_group_list([]) ->
+ [#{certs => [[]], private_key => #{}}];
+final_group_list(List) ->
+ List.
+
 %%--------------------------------------------------------------------
 %%% Internal functions
 %%--------------------------------------------------------------------
diff --git a/lib/ssl/src/ssl_config.erl b/lib/ssl/src/ssl_config.erl
index 91bd03decf..46578c05a5 100644
--- a/lib/ssl/src/ssl_config.erl
+++ b/lib/ssl/src/ssl_config.erl
@@ -41,20 +41,162 @@
 %% Internal application API
 %%====================================================================
 init(#{erl_dist := ErlDist,
- key := Key,
- keyfile := KeyFile,
- password := Password, %% Can be fun() or string()
 dh := DH,
 dhfile := DHFile} = SslOpts, Role) ->
 
 init_manager_name(ErlDist),
+ #{pem_cache := PemCache} = Config = init_cacerts(SslOpts, Role),
+ DHParams = init_diffie_hellman(PemCache, DH, DHFile, Role),
+
+ CertKeyAlts = init_certs_keys(SslOpts, Role, PemCache),
+
+ {ok, Config#{cert_key_alts => CertKeyAlts, dh_params => DHParams}}.
 
- {ok, #{pem_cache := PemCache} = Config, Certs}
-	= init_certificates(SslOpts, Role),
+init_certs_keys(#{certs_keys := CertsKeys}, Role, PemCache) ->
+ Pairs = lists:map(fun(CertKey) -> cert_key_pair(CertKey, Role, PemCache) end, CertsKeys),
+ CertKeyGroups = group_pairs(Pairs),
+ prioritize_groups(CertKeyGroups);
+init_certs_keys(SslOpts, Role, PemCache) ->
+ KeyPair = init_cert_key_pair(SslOpts, Role, PemCache),
+ group_pairs([KeyPair]).
+
+init_cert_key_pair(#{key := Key,
+ keyfile := KeyFile,
+ password := Password} = Opts, Role, PemCache) ->
+ {ok, Certs} = init_certificates(Opts, PemCache, Role),
 PrivateKey =
 	init_private_key(PemCache, Key, KeyFile, Password, Role),
- DHParams = init_diffie_hellman(PemCache, DH, DHFile, Role),
- {ok, Config#{cert_key_pairs => [#{private_key => PrivateKey, certs => Certs}], dh_params => DHParams}}.
+ #{private_key => PrivateKey, certs => Certs}.
+
+cert_key_pair(CertKey, Role, PemCache) ->
+ CertKeyPairConf = cert_conf(key_conf(CertKey)),
+ init_cert_key_pair(CertKeyPairConf, Role, PemCache).
+
+
+group_pairs([#{certs := [[]]}]) ->
+ #{eddsa => [],
+ ecdsa => [],
+ rsa_pss_pss => [],
+ rsa => [],
+ dsa => []
+ };
+group_pairs(Pairs) ->
+ group_pairs(Pairs, #{eddsa => [],
+ ecdsa => [],
+ rsa_pss_pss => [],
+ rsa => [],
+ dsa => []
+ }).
+group_pairs([], Group) ->
+ Group;
+group_pairs([#{private_key := #'ECPrivateKey'{parameters = {namedCurve, ?'id-Ed25519'}}} = Pair | Rest], #{eddsa := EDDSA} = Group) ->
+ group_pairs(Rest, Group#{eddsa => [Pair | EDDSA]});
+group_pairs([#{private_key := #'ECPrivateKey'{parameters = {namedCurve, ?'id-Ed448'}}} = Pair | Rest], #{eddsa := EDDSA} = Group) ->
+ group_pairs(Rest, Group#{eddsa => [Pair | EDDSA]});
+group_pairs([#{private_key := #'ECPrivateKey'{}} = Pair | Rest], #{ecdsa := ECDSA} = Group) ->
+ group_pairs(Rest, Group#{ecdsa => [Pair | ECDSA]});
+group_pairs([#{private_key := {#'RSAPrivateKey'{}, #'RSASSA-PSS-params'{}}} = Pair | Rest], #{rsa_pss_pss := RSAPSS} = Group) ->
+ group_pairs(Rest, Group#{rsa_pss_pss => [Pair | RSAPSS]});
+group_pairs([#{private_key := #'RSAPrivateKey'{}} = Pair | Rest], #{rsa := RSA} = Group) ->
+ group_pairs(Rest, Group#{rsa => [Pair | RSA]});
+group_pairs([#{private_key := #'DSAPrivateKey'{}} = Pair | Rest], #{dsa := DSA} = Group) ->
+ group_pairs(Rest, Group#{dsa => [Pair | DSA]});
+group_pairs([#{private_key := #{algorithm := dss, engine := _}} = Pair | Rest], Group) ->
+ Pairs = maps:get(dsa, Group),
+ group_pairs(Rest, Group#{dsa => [Pair | Pairs]});
+group_pairs([#{private_key := #{algorithm := Alg, engine := _}} = Pair | Rest], Group) ->
+ Pairs = maps:get(Alg, Group),
+ group_pairs(Rest, Group#{Alg => [Pair | Pairs]}).
+
+prioritize_groups(#{eddsa := EDDSA,
+ ecdsa := ECDSA,
+ rsa_pss_pss := RSAPSS,
+ rsa := RSA,
+ dsa := DSA} = CertKeyGroups) ->
+ CertKeyGroups#{eddsa => prio_eddsa(EDDSA),
+ ecdsa => prio_ecdsa(ECDSA),
+ rsa_pss_pss => prio_rsa_pss(RSAPSS),
+ rsa => prio_rsa(RSA),
+ dsa => prio_dsa(DSA)}.
+
+prio_eddsa(EDDSA) ->
+ %% Engine not supported yet
+ using_curve({namedCurve, ?'id-Ed25519'}, EDDSA, []) ++ using_curve({namedCurve, ?'id-Ed448'}, EDDSA, []).
+
+prio_ecdsa(ECDSA) ->
+ EnginePairs = [Pair || Pair = #{private_key := #{engine := _}} <- ECDSA],
+ Curves = tls_v1:ecc_curves(all),
+ EnginePairs ++ lists:foldr(fun(Curve, AccIn) ->
+ CurveOid = pubkey_cert_records:namedCurves(Curve),
+ Pairs = using_curve({namedCurve, CurveOid}, ECDSA -- EnginePairs, []),
+ Pairs ++ AccIn
+ end, [], Curves).
+using_curve(_, [], Acc) ->
+ lists:reverse(Acc);
+using_curve(Curve, [#{private_key := #'ECPrivateKey'{parameters = Curve}} = Pair | Rest], Acc) ->
+ using_curve(Curve, Rest, [Pair | Acc]);
+using_curve(Curve, [_ | Rest], Acc) ->
+ using_curve(Curve, Rest, Acc).
+
+prio_rsa_pss(RSAPSS) ->
+ Order = fun(#{privat_key := {#'RSAPrivateKey'{modulus = N}, Params1}},
+ #{private_key := {#'RSAPrivateKey'{modulus = N}, Params2}}) ->
+ prio_params_1(Params1, Params2);
+ (#{private_key := {#'RSAPrivateKey'{modulus = N}, _}},
+ #{private_key := {#'RSAPrivateKey'{modulus = M}, _}}) when M > N ->
+ true;
+ (#{private_key := #{engine := _}}, _) ->
+ true;
+ (_,_) ->
+ false
+ end,
+ lists:sort(Order, RSAPSS).
+
+prio_params_1(#'RSASSA-PSS-params'{hashAlgorithm = #'HashAlgorithm'{algorithm = Oid1}},
+ #'RSASSA-PSS-params'{hashAlgorithm = #'HashAlgorithm'{algorithm = Oid2}}) ->
+ public_key:pkix_hash_type(Oid1) > public_key:pkix_hash_type(Oid2).
+
+prio_rsa(RSA) ->
+ Order = fun(#{key := #'RSAPrivateKey'{modulus = N}},
+ #{key := #'RSAPrivateKey'{modulus = M}}) when M > N ->
+ true;
+ (#{private_key := #{engine := _}}, _) ->
+ true;
+ (_,_) ->
+ false
+ end,
+ lists:sort(Order, RSA).
+
+prio_dsa(DSA) ->
+ Order = fun(#{key := #'DSAPrivateKey'{q = N}},
+ #{key := #'DSAPrivateKey'{q = M}}) when M > N ->
+ true;
+ (#{private_key := #{engine := _}}, _) ->
+ true;
+ (_,_) ->
+ false
+ end,
+ lists:sort(Order, DSA).
+
+key_conf(#{key := _} = Conf) ->
+ Conf#{certfile => <<>>,
+ keyfile => <<>>,
+ password => undefined};
+key_conf(#{keyfile := _} = Conf) ->
+ case maps:get(password, Conf, undefined) of
+ undefined ->
+ Conf#{key => undefined,
+ password => undefined};
+ _ ->
+ Conf#{key => undefined}
+ end.
+
+cert_conf(#{cert := Bin} = Conf) when is_binary(Bin)->
+ Conf#{cert => [Bin]};
+cert_conf(#{cert := _} = Conf) ->
+ Conf#{certfile => <<>>};
+cert_conf(#{certfile := _} = Conf) ->
+ Conf#{cert => undefined}.
 
 pre_1_3_session_opts(Role) ->
 {Cb, InitArgs} = session_cb_opts(Role),
@@ -119,12 +261,10 @@ init_manager_name(true) ->
 put(ssl_manager, ssl_manager:name(dist)),
 put(ssl_pem_cache, ssl_pem_cache:name(dist)).
 
-init_certificates(#{cacerts := CaCerts,
- cacertfile := CACertFile,
- certfile := CertFile,
- cert := OwnCerts,
- crl_cache := CRLCache
- }, Role) ->
+init_cacerts(#{cacerts := CaCerts,
+ cacertfile := CACertFile,
+ crl_cache := CRLCache
+ }, Role) ->
 {ok, Config} =
 	try 
 	 Certs = case CaCerts of
@@ -138,31 +278,36 @@ init_certificates(#{cacerts := CaCerts,
 	 _:Reason ->
 		file_error(CACertFile, {cacertfile, Reason})
 	end,
- init_certificates(OwnCerts, Config, CertFile, Role).
+ Config.
 
-init_certificates(undefined, Config, <<>>, _) ->
- {ok, Config, [[]]};
+init_certificates(#{certfile := CertFile,
+ cert := OwnCerts}, PemCache, Role) ->
+ init_certificates(OwnCerts, PemCache, CertFile, Role).
 
-init_certificates(undefined, #{pem_cache := PemCache} = Config, CertFile, client) ->
+init_certificates(undefined, _, <<>>, _) ->
+ {ok, [[]]};
+init_certificates(undefined, PemCache, CertFile, client) ->
 try 
 %% OwnCert | [OwnCert | Chain]
 	OwnCerts = ssl_certificate:file_to_certificats(CertFile, PemCache),
-	{ok, Config, OwnCerts}
+	{ok, OwnCerts}
 catch _Error:_Reason ->
-	 {ok, Config, [[]]}
+	 {ok, [[]]}
 end; 
-
-init_certificates(undefined, #{pem_cache := PemCache} = Config, CertFile, server) ->
+init_certificates(undefined, PemCache, CertFile, server) ->
 try
 %% OwnCert | [OwnCert | Chain]
 	OwnCerts = ssl_certificate:file_to_certificats(CertFile, PemCache),
-	{ok, Config, OwnCerts}
+	{ok, OwnCerts}
 catch
 	_:Reason ->
 	 file_error(CertFile, {certfile, Reason})	 
 end;
-init_certificates(OwnCerts, Config, _, _) ->
- {ok, Config, OwnCerts}.
+init_certificates(OwnCerts, _, _, _) when is_binary(OwnCerts)->
+ {ok, [OwnCerts]};
+init_certificates(OwnCerts, _, _, _) ->
+ {ok, OwnCerts}.
+
 init_private_key(_, #{algorithm := Alg} = Key, _, _Password, _Client) when Alg == ecdsa;
 Alg == rsa;
 Alg == dss ->
diff --git a/lib/ssl/src/ssl_connection.hrl b/lib/ssl/src/ssl_connection.hrl
index 86ee57d7fa..2ee37ffb30 100644
--- a/lib/ssl/src/ssl_connection.hrl
+++ b/lib/ssl/src/ssl_connection.hrl
@@ -97,9 +97,12 @@
 socket_tls_closed = false ::boolean(),
 negotiated_version :: ssl_record:ssl_version() | 'undefined',
 erl_dist_handle = undefined :: erlang:dist_handle() | 'undefined',
- cert_key_pairs = undefined :: [#{private_key => public_key:private_key(),
- certs => [public_key:der_encoded()]}]
- | secret_printout() | 'undefined'
+ cert_key_alts = undefined :: #{eddsa => list(),
+ ecdsa => list(),
+ rsa_pss_pss => list(),
+ rsa => list(),
+ dsa => list()
+ } | secret_printout() | 'undefined'
 }).
 
 -record(state, {
diff --git a/lib/ssl/src/ssl_gen_statem.erl b/lib/ssl/src/ssl_gen_statem.erl
index 6aba9c1b71..eaad3f0967 100644
--- a/lib/ssl/src/ssl_gen_statem.erl
+++ b/lib/ssl/src/ssl_gen_statem.erl
@@ -160,7 +160,7 @@ ssl_config(Opts, Role, #state{static_env = InitStatEnv0,
 fileref_db_handle := FileRefHandle,
 session_cache := CacheHandle,
 crl_db_info := CRLDbHandle,
- cert_key_pairs := CertKeyPairs,
+ cert_key_alts := CertKeyAlts,
 dh_params := DHParams}} =
 	ssl_config:init(Opts, Role),
 TimeStamp = erlang:monotonic_time(),
@@ -175,7 +175,7 @@ ssl_config(Opts, Role, #state{static_env = InitStatEnv0,
 },
 handshake_env = HsEnv#handshake_env{diffie_hellman_params = DHParams,
 continue_status = ContinueStatus},
- connection_env = CEnv#connection_env{cert_key_pairs = CertKeyPairs},
+ connection_env = CEnv#connection_env{cert_key_alts = CertKeyAlts},
 ssl_options = Opts}.
 
 %%--------------------------------------------------------------------
@@ -1282,7 +1282,7 @@ handle_sni_hostname(Hostname,
 fileref_db_handle := FileRefHandle,
 session_cache := CacheHandle,
 crl_db_info := CRLDbHandle,
- cert_key_pairs := CertKeyPairs,
+ cert_key_alts := CertKeyAlts,
 dh_params := DHParams}} =
 ssl_config:init(NewOptions, Role),
 State0#state{
@@ -1293,7 +1293,7 @@ handle_sni_hostname(Hostname,
 crl_db = CRLDbHandle,
 session_cache = CacheHandle
 },
- connection_env = CEnv#connection_env{cert_key_pairs = CertKeyPairs},
+ connection_env = CEnv#connection_env{cert_key_alts = CertKeyAlts},
 ssl_options = NewOptions,
 handshake_env = HsEnv#handshake_env{sni_hostname = Hostname,
 diffie_hellman_params = DHParams}
diff --git a/lib/ssl/src/ssl_handshake.erl b/lib/ssl/src/ssl_handshake.erl
index a109e30f18..02bc8ea838 100644
--- a/lib/ssl/src/ssl_handshake.erl
+++ b/lib/ssl/src/ssl_handshake.erl
@@ -971,6 +971,7 @@ decode_suites('2_bytes', Dec) ->
 decode_suites('3_bytes', Dec) ->
 from_3bytes(Dec).
 
+
 %%====================================================================
 %% Cipher suite handling
 %%====================================================================
@@ -1046,7 +1047,8 @@ cipher_suites(Suites, true) ->
 prf({3,_N}, PRFAlgo, Secret, Label, Seed, WantedLength) ->
 {ok, tls_v1:prf(PRFAlgo, Secret, Label, Seed, WantedLength)}.
 
-select_session(SuggestedSessionId, CipherSuites, HashSigns, Compressions, SessIdTracker, Session0, Version, SslOpts, CertKeyPairs) ->
+select_session(SuggestedSessionId, CipherSuites, HashSigns, Compressions, SessIdTracker, Session0, Version, SslOpts, CertKeyAlts) ->
+ CertKeyPairs = ssl_certificate:available_cert_key_pairs(CertKeyAlts, Version),
 {SessionId, Resumed} = ssl_session:server_select_session(Version, SessIdTracker, SuggestedSessionId,
 SslOpts, CertKeyPairs),
 case Resumed of
@@ -1095,10 +1097,24 @@ select_cert_key_pair_and_params(CipherSuites, [#{private_key := Key, certs := [C
 no_suite ->
 select_cert_key_pair_and_params(CipherSuites, Rest, HashSigns, ECCCurve0, Opts, Version);
 CipherSuite0 ->
- CurveAndSuite = cert_curve(Cert, ECCCurve0, CipherSuite0),
- {Certs, Key, CurveAndSuite}
+ case is_acceptable_cert(Cert, HashSigns, ssl:tls_version(Version)) of
+ true ->
+ CurveAndSuite = cert_curve(Cert, ECCCurve0, CipherSuite0),
+ {Certs, Key, CurveAndSuite};
+ false ->
+ select_cert_key_pair_and_params(CipherSuites, Rest, HashSigns, ECCCurve0, Opts, Version)
+ end
 end.
 
+is_acceptable_cert(Cert, HashSigns, {Major, Minor}) when Major == 3,
+ Minor >= 3 ->
+ {SignAlgo0, Param, _, _, _} = get_cert_params(Cert),
+ SignAlgo = sign_algo(SignAlgo0, Param),
+ is_acceptable_hash_sign(SignAlgo, HashSigns);
+is_acceptable_cert(_,_,_) ->
+ %% Not negotiable pre TLS-1.2. So if cert is available for version it is acceptable
+ true.
+
 supported_ecc({Major, Minor}) when ((Major == 3) and (Minor >= 1)) orelse (Major > 3) ->
 Curves = tls_v1:ecc_curves(Minor),
 #elliptic_curves{elliptic_curve_list = Curves};
diff --git a/lib/ssl/src/ssl_internal.hrl b/lib/ssl/src/ssl_internal.hrl
index 4e87ea0acb..93d7c2456e 100644
--- a/lib/ssl/src/ssl_internal.hrl
+++ b/lib/ssl/src/ssl_internal.hrl
@@ -132,6 +132,7 @@
 cacerts]},
 cacerts => {undefined, [versions]},
 cert => {undefined, [versions]},
+ certs_keys => {undefined, [versions]},
 certfile => {<<>>, [versions]},
 certificate_authorities => {false, [versions]},
 ciphers => {[], [versions]},
diff --git a/lib/ssl/src/tls_connection.erl b/lib/ssl/src/tls_connection.erl
index 05cf5bb6c3..52c72d7d69 100644
--- a/lib/ssl/src/tls_connection.erl
+++ b/lib/ssl/src/tls_connection.erl
@@ -141,11 +141,12 @@ init([Role, Sender, Host, Port, Socket, Options, User, CbInfo]) ->
 	State1 = #state{static_env = #static_env{session_cache = Cache,
 session_cache_cb = CacheCb
 },
- connection_env = #connection_env{cert_key_pairs = CertKeyPairs},
+ connection_env = #connection_env{cert_key_alts = CertKeyAlts},
 ssl_options = SslOptions,
 session = Session0} = ssl_gen_statem:ssl_config(State0#state.ssl_options, Role, State0),
 State = case Role of
 client ->
+ CertKeyPairs = ssl_certificate:available_cert_key_pairs(CertKeyAlts),
 Session = ssl_session:client_select_session({Host, Port, SslOptions}, Cache, CacheCb, Session0, CertKeyPairs),
 State1#state{session = Session};
 server ->
@@ -353,13 +354,14 @@ connection(internal, #hello_request{},
 handshake_env = #handshake_env{
 renegotiation = {Renegotiation, peer},
 ocsp_stapling_state = OcspState},
- connection_env = #connection_env{cert_key_pairs = CertKeyPairs},
+ connection_env = #connection_env{cert_key_alts = CertKeyAlts},
 		 session = Session0,
 		 ssl_options = SslOpts, 
 protocol_specific = #{sender := Pid},
 		 connection_states = ConnectionStates} = State0) ->
 try tls_sender:peer_renegotiate(Pid) of
 {ok, Write} ->
+ CertKeyPairs = ssl_certificate:available_cert_key_pairs(CertKeyAlts),
 Session = ssl_session:client_select_session({Host, Port, SslOpts}, Cache, CacheCb, Session0, CertKeyPairs),
 Hello = tls_handshake:client_hello(Host, Port, ConnectionStates, SslOpts,
 Session#session.session_id,
@@ -513,7 +515,7 @@ handle_client_hello(#client_hello{client_version = ClientVersion} = Hello, State
 renegotiation = {Renegotiation, _},
 negotiated_protocol = CurrentProtocol,
 sni_guided_cert_selection = SNICertSelection} = HsEnv,
- connection_env = #connection_env{cert_key_pairs = CertKeyPairs} = CEnv,
+ connection_env = #connection_env{cert_key_alts = CertKeyAlts} = CEnv,
 session = Session0,
 ssl_options = SslOpts} = State,
 SessionTracker = proplists:get_value(session_id_tracker, Trackers),
@@ -522,7 +524,7 @@ handle_client_hello(#client_hello{client_version = ClientVersion} = Hello, State
 tls_handshake:hello(Hello,
 SslOpts,
 {SessionTracker, Session0,
- ConnectionStates0, CertKeyPairs, KeyExAlg},
+ ConnectionStates0, CertKeyAlts, KeyExAlg},
 Renegotiation),
 Protocol = case Protocol0 of
 undefined -> CurrentProtocol;
diff --git a/lib/ssl/src/tls_dtls_connection.erl b/lib/ssl/src/tls_dtls_connection.erl
index 9f0bf8132e..ce0372b84e 100644
--- a/lib/ssl/src/tls_dtls_connection.erl
+++ b/lib/ssl/src/tls_dtls_connection.erl
@@ -409,7 +409,7 @@ certify(internal, #certificate_request{},
 	#state{static_env = #static_env{role = client,
 protocol_cb = Connection},
 session = Session0,
- connection_env = #connection_env{cert_key_pairs = [#{certs := [[]]}]}} = State) ->
+ connection_env = #connection_env{cert_key_alts = [#{certs := [[]]}]}} = State) ->
 %% The client does not have a certificate and will send an empty reply, the server may fail 
 %% or accept the connection by its own preference. No signature algorithms needed as there is
 %% no certificate to verify.
@@ -422,11 +422,12 @@ certify(internal, #certificate_request{} = CertRequest,
 cert_db = CertDbHandle,
 cert_db_ref = CertDbRef},
 connection_env = #connection_env{negotiated_version = Version,
- cert_key_pairs = CertKeyPairs
+ cert_key_alts = CertKeyAlts
 },
 session = Session0,
 ssl_options = #{signature_algs := SupportedHashSigns}} = State) ->
 TLSVersion = ssl:tls_version(Version),
+ CertKeyPairs = ssl_certificate:available_cert_key_pairs(CertKeyAlts, ssl:tls_version(Version)),
 Session = select_client_cert_key_pair(Session0, CertRequest, CertKeyPairs,
 SupportedHashSigns, TLSVersion,
 CertDbHandle, CertDbRef),
diff --git a/lib/ssl/src/tls_handshake_1_3.erl b/lib/ssl/src/tls_handshake_1_3.erl
index 84ee036a46..a68c7de159 100644
--- a/lib/ssl/src/tls_handshake_1_3.erl
+++ b/lib/ssl/src/tls_handshake_1_3.erl
@@ -652,7 +652,7 @@ do_start(#client_hello{cipher_suites = ClientCiphers,
 
 #state{connection_states = ConnectionStates0,
 session = Session0,
- connection_env = #connection_env{cert_key_pairs = CertKeyPairs}} = State1 =
+ connection_env = #connection_env{cert_key_alts = CertKeyAlts}} = State1 =
 Maybe(ssl_gen_statem:handle_sni_extension(SNI, State0)),
 
 Maybe(validate_cookie(Cookie, State1)),
@@ -667,6 +667,7 @@ do_start(#client_hello{cipher_suites = ClientCiphers,
 Cipher = Maybe(select_cipher_suite(HonorCipherOrder, ClientCiphers, ServerCiphers)),
 Groups = Maybe(select_common_groups(ServerGroups, ClientGroups)),
 Maybe(validate_client_key_share(ClientGroups, ClientShares)),
+ CertKeyPairs = ssl_certificate:available_cert_key_pairs(CertKeyAlts, {3,4}),
 #session{own_certificates = [Cert|_]} = Session =
 Maybe(select_server_cert_key_pair(Session0, CertKeyPairs, ClientSignAlgs,
 ClientSignAlgsCert, CertAuths, State0,
@@ -1431,7 +1432,8 @@ create_change_cipher_spec(#state{ssl_options = #{log_level := LogLevel}}) ->
 process_certificate_request(#certificate_request_1_3{
 extensions = Extensions},
 #state{ssl_options = #{signature_algs := ClientSignAlgs},
- connection_env = #connection_env{cert_key_pairs = CertKeyPairs},
+ connection_env = #connection_env{cert_key_alts = CertKeyAlts,
+ negotiated_version = Version},
 static_env = #static_env{cert_db = CertDbHandle, cert_db_ref = CertDbRef},
 session = Session0} =
 State) ->
@@ -1441,6 +1443,7 @@ process_certificate_request(#certificate_request_1_3{
 maps:get(signature_algs_cert, Extensions, undefined)),
 CertAuths = get_certificate_authorities(maps:get(certificate_authorities, Extensions, undefined)),
 
+ CertKeyPairs = ssl_certificate:available_cert_key_pairs(CertKeyAlts, Version),
 Session = select_client_cert_key_pair(Session0, CertKeyPairs,
 ServerSignAlgs, ServerSignAlgsCert, ClientSignAlgs,
 CertDbHandle, CertDbRef, CertAuths),
diff --git a/lib/ssl/test/ssl_api_SUITE.erl b/lib/ssl/test/ssl_api_SUITE.erl
index c686fac6d6..b839d72a22 100644
--- a/lib/ssl/test/ssl_api_SUITE.erl
+++ b/lib/ssl/test/ssl_api_SUITE.erl
@@ -50,6 +50,8 @@
 peercert/1,
 peercert_with_client_cert/0,
 peercert_with_client_cert/1,
+ select_best_cert/0,
+ select_best_cert/1,
 connection_information/0,
 connection_information/1,
 secret_connection_info/0,
@@ -205,6 +207,7 @@
 	 log/2,
 get_connection_information/3,
 protocol_version_check/2,
+ check_peercert/2,
 %%TODO Keep?
 run_error_server/1,
 run_error_server_close/1,
@@ -269,6 +272,7 @@ gen_api_tests() ->
 [
 peercert,
 peercert_with_client_cert,
+ select_best_cert,
 connection_information,
 secret_connection_info,
 keylog_connection_info,
@@ -427,6 +431,23 @@ init_per_testcase(check_random_nonce, Config) ->
 ssl_test_lib:ct_log_supported_protocol_versions(Config),
 ct:timetrap({seconds, 20}),
 Config;
+init_per_testcase(select_best_cert, Config) ->
+ ct:timetrap({seconds, 10}),
+ Version = ssl_test_lib:protocol_version(Config),
+ %% We need to make sure TLS-1.3 can be supported as
+ %% want to generate a TLS-1.3 specific certificate that will not
+ %% be chosen
+ case Version of
+ 'tlsv1.2' ->
+ case ssl_test_lib:sufficient_crypto_support('tlsv1.3') of
+ true ->
+ Config;
+ false ->
+ {skip, "Crypto does not support EDDSA"}
+ end;
+ _ ->
+ Config
+ end;
 init_per_testcase(_TestCase, Config) ->
 ssl_test_lib:ct_log_supported_protocol_versions(Config),
 ct:timetrap({seconds, 10}),
@@ -508,6 +529,24 @@ peercert_with_client_cert(Config) when is_list(Config) ->
 ssl_test_lib:close(Server),
 ssl_test_lib:close(Client).
 
+%%--------------------------------------------------------------------
+select_best_cert() ->
+ [{doc,"Basic test of the certs_keys option."}].
+
+select_best_cert(Config) when is_list(Config) ->
+ Version = ssl_test_lib:protocol_version(Config),
+ Conf = test_config(Version, Config),
+ lists:foreach(
+ fun({#{server_config := SConfig,
+ client_config := CConfig},
+ {client_peer, CExpected},
+ {server_peer, SExpected}}) ->
+ selected_peer(CExpected, SExpected,
+ ssl_test_lib:ssl_options(CConfig, Config),
+ ssl_test_lib:ssl_options(SConfig, Config),
+ Conf)
+ end, Conf).
+
 %%--------------------------------------------------------------------
 connection_information() ->
 [{doc,"Test the API function ssl:connection_information/1"}].
@@ -3169,3 +3208,186 @@ dtls_exclusive_non_default_version(DTLSVersion) ->
 tls_v1:srp_exclusive(Minor) ++
 tls_v1:rsa_exclusive(Minor) ++ 
 tls_v1:des_exclusive(Minor).
+
+selected_peer(ExpectedClient,
+ ExpectedServer, ClientOpts, ServerOpts, Config) ->
+ {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),
+
+ Server = ssl_test_lib:start_server([{node, ServerNode}, {port, 0},
+					{from, self()},
+ {mfa, {?MODULE, check_peercert, [ExpectedServer]}},
+ {options, ssl_test_lib:ssl_options(ServerOpts, Config)}]),
+ Port = ssl_test_lib:inet_port(Server),
+
+ Client = ssl_test_lib:start_client([{node, ClientNode}, {port, Port},
+ {host, Hostname},
+ {from, self()},
+ {mfa, {?MODULE, check_peercert, [ExpectedClient]}},
+ {options, ssl_test_lib:ssl_options(ClientOpts, Config)}
+					]),
+
+ ssl_test_lib:check_result(Server, ok, Client, ok),
+ %% Make sure to start next test fresh
+ ssl:stop(),
+ ssl:start().
+
+test_config('tlsv1.3', _) ->
+ #{server_config := SEDDSAOpts,
+ client_config := CEDDSAOpts} = eddsa_cert_chains(),
+ #{server_config := SECDSAOpts,
+ client_config := CECDSAOpts } = ecdsa_cert_chains(),
+
+ {SEDDSACert, SEDDSAKey, SEDDSACACerts} = get_single_options(cert, key, cacerts, SEDDSAOpts),
+ {CEDDSACert, CEDDSAKey, CEDDSACACerts} = get_single_options(cert, key, cacerts, CEDDSAOpts),
+
+ {SECDSACert, SECDSAKey, SECDSACACerts} = get_single_options(cert, key, cacerts, SECDSAOpts),
+ {CECDSACert, CECDSAKey, CECDSACACerts} = get_single_options(cert, key, cacerts, CECDSAOpts),
+
+ ServerCertKeys = [#{cert => SECDSACert, key => SECDSAKey},
+ #{cert => SEDDSACert, key => SEDDSAKey}],
+
+ ClientCertKeys = [#{cert => CECDSACert, key => CECDSAKey},
+ #{cert => CEDDSACert, key => CEDDSAKey}],
+
+ [{#{server_config => [{certs_keys,ServerCertKeys},
+ {verify, verify_peer}, {versions, ['tlsv1.3', 'tlsv1.2']},
+ {cacerts, SEDDSACACerts ++ SECDSACACerts}],
+ client_config => [{certs_keys, ClientCertKeys},
+ {verify, verify_peer}, {versions, ['tlsv1.3', 'tlsv1.2']},
+ {cacerts, CEDDSACACerts ++ CECDSACACerts}]
+ },
+ {client_peer, SEDDSACert}, {server_peer, CEDDSACert}},
+ {#{server_config => [{certs_keys, ServerCertKeys},
+ {verify, verify_peer}, {versions, ['tlsv1.2']},
+ {cacerts, SEDDSACACerts ++ SECDSACACerts}],
+ client_config => [{certs_keys, ClientCertKeys},
+ {verify, verify_peer}, {versions, ['tlsv1.2']},
+ {cacerts, CEDDSACACerts ++ CECDSACACerts}]},
+ {client_peer, SECDSACert}, {server_peer, CECDSACert}}
+ ];
+test_config('tlsv1.2', _) ->
+ #{server_config := SRSAOpts,
+ client_config := CRSAOpts} = eddsa_cert_chains(),
+ #{server_config := SDSAOpts,
+ client_config := CDSAOpts} = dsa_cert_chains(),
+
+ {SRSACert, SRSAKey, SRSACACerts} = get_single_options(cert, key, cacerts, SRSAOpts),
+ {CRSACert, CRSAKey, CRSACACerts} = get_single_options(cert, key, cacerts, CRSAOpts),
+
+ {SDSACert, SDSAKey, SDSACACerts} = get_single_options(cert, key, cacerts, SDSAOpts),
+ {CDSACert, CDSAKey, CDSACACerts} = get_single_options(cert, key, cacerts, CDSAOpts),
+
+
+ [{#{server_config => [{certs_keys, [#{cert => SDSACert, key => SDSAKey}, #{cert => SRSACert, key => SRSAKey}]},
+ {verify, verify_peer}, {versions, ['tlsv1.3', 'tlsv1.2']},
+ {cacerts, SRSACACerts ++ SDSACACerts}],
+ client_config => [{certs_keys, [#{cert => CDSACert, key => CDSAKey}, #{cert => CRSACert, key => CRSAKey}]},
+ {verify, verify_peer}, {versions, ['tlsv1.3', 'tlsv1.2']},
+ {cacerts, CRSACACerts ++ CDSACACerts}]
+ }, {client_peer, SRSACert}, {server_peer, CRSACert}},
+ {#{server_config => [{certs_keys, [#{cert => SDSACert, key => SDSAKey}, #{cert => SRSACert, key => SRSAKey}]},
+ {verify, verify_peer}, {versions, ['tlsv1.2']},
+ {cacerts, SRSACACerts ++ SDSACACerts}],
+ client_config => [{certs_keys, [#{cert => CDSACert, key => CDSAKey}, #{cert => CRSACert, key => CRSAKey}]},
+ {verify, verify_peer}, {versions, ['tlsv1.2']},
+ {cacerts, CRSACACerts ++ CDSACACerts}]
+ }, {client_peer, SDSACert}, {server_peer, CDSACert}}];
+test_config('dtlsv1.2', Config) ->
+ #{server_config := SRSAPSSOpts,
+ client_config := CRSAPSSOpts} = ssl_test_lib:make_rsa_pss_pem(rsa_pss_pss, [], Config, "dtls_pss_pss_conf"),
+ #{server_config := SRSAPSSRSAEOpts,
+ client_config := CRSAPSSRSAEOpts} = ssl_test_lib:make_rsa_pss_pem(rsa_pss_rsae, [], Config, "dtls_pss_rsae_conf"),
+
+ {SRSAPSSCert, SRSAPSSKey, SRSAPSSCACerts} = get_single_options(certfile, keyfile, cacertfile, SRSAPSSOpts),
+ {CRSAPSSCert, CRSAPSSKey, CRSAPSSCACerts} = get_single_options(certfile, keyfile, cacertfile, CRSAPSSOpts),
+
+ {SRSAPSSRSAECert, SRSAPSSRSAEKey, SRSAPSSRSAECACerts} = get_single_options(certfile, keyfile, cacertfile, SRSAPSSRSAEOpts),
+ {CRSAPSSRSAECert, CRSAPSSRSAEKey, CRSAPSSRSAECACerts} = get_single_options(certfile, keyfile, cacertfile, CRSAPSSRSAEOpts),
+
+ [{#{server_config => [{certs_keys, [#{certfile => SRSAPSSRSAECert, keyfile => SRSAPSSRSAEKey},
+ #{certfile => SRSAPSSCert, keyfile => SRSAPSSKey}]},
+ {verify, verify_peer},
+ {cacertfile, CRSAPSSCACerts}],
+ client_config => [{certs_keys, [#{certfile => CRSAPSSRSAECert, keyfile => CRSAPSSRSAEKey},
+ #{certfile => CRSAPSSCert, keyfile => CRSAPSSKey}]},
+ {verify, verify_peer},
+ {cacertfile, SRSAPSSCACerts}]
+ },
+ {client_peer, pem_to_der_cert(SRSAPSSCert)}, {server_peer, pem_to_der_cert(CRSAPSSCert)}},
+ {#{server_config => [{certs_keys, [#{certfile => SRSAPSSRSAECert, keyfile => SRSAPSSRSAEKey},
+ #{certfile => SRSAPSSCert, keyfile => SRSAPSSKey}]},
+ {verify, verify_peer},
+ {cacertfile, CRSAPSSRSAECACerts}],
+ client_config => [{certs_keys, [#{certfile => CRSAPSSRSAECert, keyfile => CRSAPSSRSAEKey}]},
+ {verify, verify_peer}, {signature_algs, [rsa_pss_rsae_sha256]},
+ {cacertfile, SRSAPSSRSAECACerts}]
+ },
+ {client_peer, pem_to_der_cert(SRSAPSSRSAECert)}, {server_peer, pem_to_der_cert(CRSAPSSRSAECert)}}
+ ];
+test_config(_, Config) ->
+ RSAConf1 = ssl_test_lib:make_rsa_cert(Config),
+ SRSA1Opts = proplists:get_value(server_rsa_opts, RSAConf1),
+ CRSA1Opts = proplists:get_value(client_rsa_opts, RSAConf1),
+
+ RSAConf2 = ssl_test_lib:make_rsa_1024_cert(Config),
+ SRSA2Opts = proplists:get_value(server_rsa_1024_opts, RSAConf2),
+ CRSA2Opts = proplists:get_value(client_rsa_1024_opts, RSAConf2),
+
+ {SRSA1Cert, SRSA1Key, _SRSA1CACerts} = get_single_options(certfile, keyfile, cacertfile, SRSA1Opts),
+ {CRSA1Cert, CRSA1Key, _CRSA1CACerts} = get_single_options(certfile, keyfile, cacertfile, CRSA1Opts),
+
+ {SRSA2Cert, SRSA2Key, SRSA2CACerts} = get_single_options(certfile, keyfile, cacertfile, SRSA2Opts),
+ {CRSA2Cert, CRSA2Key, CRSA2CACerts} = get_single_options(certfile, keyfile, cacertfile, CRSA2Opts),
+
+ [{#{server_config => [{certs_keys, [#{certfile => SRSA2Cert, keyfile => SRSA2Key},
+ #{certfile => SRSA1Cert, keyfile => SRSA1Key}]},
+ {verify, verify_peer},
+ {cacertfile, CRSA2CACerts}],
+ client_config => [{certs_keys, [#{certfile => CRSA2Cert, keyfile => CRSA2Key},
+ #{certfile => CRSA1Cert, keyfile => CRSA1Key}]},
+ {verify, verify_peer},
+ {cacertfile, SRSA2CACerts}]
+ }, {client_peer, pem_to_der_cert(SRSA2Cert)}, {server_peer, pem_to_der_cert(CRSA2Cert)}}].
+
+check_peercert(Socket, Cert) ->
+ case ssl:peercert(Socket) of
+ {ok, Cert} ->
+ ok;
+ {ok, Other} ->
+ {error, {{expected, public_key:pkix_decode_cert(Cert, otp)}, {got, public_key:pkix_decode_cert(Other, otp)}}}
+ end.
+
+
+eddsa_cert_chains() ->
+ public_key:pkix_test_data(#{server_chain => #{root => ssl_test_lib:eddsa_conf(),
+ intermediates => [ssl_test_lib:eddsa_conf()],
+ peer => ssl_test_lib:eddsa_conf()},
+ client_chain => #{root => ssl_test_lib:eddsa_conf(),
+ intermediates => [ssl_test_lib:eddsa_conf()],
+ peer => ssl_test_lib:eddsa_conf()}}).
+
+ecdsa_cert_chains() ->
+ public_key:pkix_test_data(#{server_chain => #{root => ssl_test_lib:ecdsa_conf(),
+ intermediates => [ssl_test_lib:ecdsa_conf()],
+ peer => ssl_test_lib:ecdsa_conf()},
+ client_chain => #{root => ssl_test_lib:ecdsa_conf(),
+ intermediates => [ssl_test_lib:ecdsa_conf()],
+ peer => ssl_test_lib:ecdsa_conf()}}).
+dsa_cert_chains() ->
+ public_key:pkix_test_data(#{server_chain => #{root => [{key, ssl_test_lib:hardcode_dsa_key(1)}],
+ intermediates => [[{key, ssl_test_lib:hardcode_dsa_key(2)}]],
+ peer => [{key, ssl_test_lib:hardcode_dsa_key(3)}]
+ },
+ client_chain => #{root => [{key, ssl_test_lib:hardcode_dsa_key(3)}],
+ intermediates => [[{key, ssl_test_lib:hardcode_dsa_key(2)}]],
+ peer => [{key, ssl_test_lib:hardcode_dsa_key(1)}]}}).
+
+get_single_options(CertOptName, KeyOptName, CaOptName, Opts) ->
+ CertOpt = proplists:get_value(CertOptName, Opts),
+ KeyOpt = proplists:get_value(KeyOptName, Opts),
+ CaOpt = proplists:get_value(CaOptName, Opts),
+ {CertOpt, KeyOpt, CaOpt}.
+
+pem_to_der_cert(Pem) ->
+ [{'Certificate', Der, _}] = ssl_test_lib:pem_to_der(Pem),
+ Der.
diff --git a/lib/ssl/test/ssl_test_lib.erl b/lib/ssl/test/ssl_test_lib.erl
index c303704f58..4489a758e0 100644
--- a/lib/ssl/test/ssl_test_lib.erl
+++ b/lib/ssl/test/ssl_test_lib.erl
@@ -126,6 +126,7 @@
 client_msg/2,
 server_msg/2,
 hardcode_rsa_key/1,
+ hardcode_dsa_key/1,
 bigger_buffers/0,
 stop/2,
 working_openssl_client/0,
-- 
2.34.1

Places

File 3722-ssl-Enable-certs_keys-config.patch of Package erlang (Revision 1fca9f2f48345e43a61098f600f2b10f)

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