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| author | Andreas Schultz <[email protected]> | 2014-01-02 11:33:39 +0100 |
|---|---|---|
| committer | Ingela Anderton Andin <[email protected]> | 2014-01-14 18:31:34 +0100 |
| commit | aa198a6556b754bf6abd48a907091d3d57d5cfa0 (patch) | |
| tree | e407289818fce07eb919e466f40670cf06e7c967 | |
| parent | 97cf23313999ac4dfb508f9f98ea63a80e6144c9 (diff) | |
| download | otp-aa198a6556b754bf6abd48a907091d3d57d5cfa0.tar.gz otp-aa198a6556b754bf6abd48a907091d3d57d5cfa0.tar.bz2 otp-aa198a6556b754bf6abd48a907091d3d57d5cfa0.zip | |
ssl: fix elliptic curve selection in server mode
The server code erroneously took the list of curves supported by the
client from it's own hello extension, effectively breaking curve
selection all together.
Also the default fallback secp256k1 curve is not supported by
all clients. secp256r1 is recommended as part of the NIST Suite B
cryptographic suites. The chances are much better that all clients
support it, so use that as fallback.
| -rw-r--r-- | lib/ssl/src/ssl_connection.erl | 2 | ||||
| -rw-r--r-- | lib/ssl/src/ssl_handshake.erl | 2 | ||||
| -rw-r--r-- | lib/ssl/src/tls_connection.erl | 8 |
3 files changed, 6 insertions, 6 deletions
diff --git a/lib/ssl/src/ssl_connection.erl b/lib/ssl/src/ssl_connection.erl index b7c1b9e8d0..82106935cb 100644 --- a/lib/ssl/src/ssl_connection.erl +++ b/lib/ssl/src/ssl_connection.erl @@ -1597,7 +1597,7 @@ default_hashsign(_Version, KeyExchange) select_curve(#state{client_ecc = {[Curve|_], _}}) -> {namedCurve, Curve}; select_curve(_) -> - {namedCurve, ?secp256k1}. + {namedCurve, ?secp256r1}. is_anonymous(Algo) when Algo == dh_anon; Algo == ecdh_anon; diff --git a/lib/ssl/src/ssl_handshake.erl b/lib/ssl/src/ssl_handshake.erl index da72ffc043..f5c0034f1b 100644 --- a/lib/ssl/src/ssl_handshake.erl +++ b/lib/ssl/src/ssl_handshake.erl @@ -1287,7 +1287,7 @@ select_curve(#elliptic_curves{elliptic_curve_list = ClientCurves}, select_curve(undefined, _) -> %% Client did not send ECC extension use default curve if %% ECC cipher is negotiated - {namedCurve, ?secp256k1}; + {namedCurve, ?secp256r1}; select_curve(_, []) -> no_curve; select_curve(Curves, [Curve| Rest]) -> diff --git a/lib/ssl/src/tls_connection.erl b/lib/ssl/src/tls_connection.erl index 8e6f80da1e..ffa04ee8ba 100644 --- a/lib/ssl/src/tls_connection.erl +++ b/lib/ssl/src/tls_connection.erl @@ -199,7 +199,9 @@ hello(start, #state{host = Host, port = Port, role = client, next_state(hello, hello, Record, State); hello(Hello = #client_hello{client_version = ClientVersion, - extensions = #hello_extensions{hash_signs = HashSigns}}, + extensions = #hello_extensions{hash_signs = HashSigns, + ec_point_formats = EcPointFormats, + elliptic_curves = EllipticCurves}}, State = #state{connection_states = ConnectionStates0, port = Port, session = #session{own_certificate = Cert} = Session0, renegotiation = {Renegotiation, _}, @@ -210,9 +212,7 @@ hello(Hello = #client_hello{client_version = ClientVersion, case tls_handshake:hello(Hello, SslOpts, {Port, Session0, Cache, CacheCb, ConnectionStates0, Cert}, Renegotiation) of {Version, {Type, Session}, - ConnectionStates, - #hello_extensions{ec_point_formats = EcPointFormats, - elliptic_curves = EllipticCurves} = ServerHelloExt} -> + ConnectionStates, ServerHelloExt} -> ssl_connection:hello({common_client_hello, Type, ServerHelloExt, HashSign}, State#state{connection_states = ConnectionStates, negotiated_version = Version, |