From dffa53a832ff1e9b2c536d3a04b594fb8e759466 Mon Sep 17 00:00:00 2001 From: Ingela Anderton Andin Date: Fri, 21 May 2010 13:07:38 +0000 Subject: Decision not to support DH and export cipher suites. --- lib/ssl/src/ssl_handshake.erl | 64 ++++++++----------------------------------- 1 file changed, 11 insertions(+), 53 deletions(-) (limited to 'lib/ssl/src/ssl_handshake.erl') diff --git a/lib/ssl/src/ssl_handshake.erl b/lib/ssl/src/ssl_handshake.erl index 3772e540b3..5f3dff8894 100644 --- a/lib/ssl/src/ssl_handshake.erl +++ b/lib/ssl/src/ssl_handshake.erl @@ -282,7 +282,7 @@ client_certificate_verify(OwnCert, MasterSecret, Version, Algorithm, PrivateKey, {Hashes0, _}) -> case public_key:pkix_is_fixed_dh_cert(OwnCert) of true -> - ignore; + ?ALERT_REC(?FATAL, ?UNSUPPORTED_CERTIFICATE); false -> Hashes = calc_certificate_verify(Version, MasterSecret, @@ -302,7 +302,6 @@ client_certificate_verify(OwnCert, MasterSecret, Version, Algorithm, certificate_verify(Signature, {_, PublicKey, _}, Version, MasterSecret, Algorithm, {_, Hashes0}) when Algorithm == rsa; - Algorithm == dh_rsa; Algorithm == dhe_rsa -> Hashes = calc_certificate_verify(Version, MasterSecret, Algorithm, Hashes0), @@ -346,13 +345,6 @@ key_exchange(client, {premaster_secret, Secret, {_, PublicKey, _}}) -> encrypted_premaster_secret(Secret, PublicKey), #client_key_exchange{exchange_keys = EncPremasterSecret}; -%% Uncomment if dh_rsa and dh_dss cipher suites should -%% be supported. -%% key_exchange(client, fixed_diffie_hellman) -> -%% #client_key_exchange{exchange_keys = -%% #client_diffie_hellman_public{ -%% dh_public = <<>> -%% }}; key_exchange(client, {dh, <>}) -> #client_key_exchange{ exchange_keys = #client_diffie_hellman_public{ @@ -725,12 +717,11 @@ master_secret(Version, MasterSecret, #security_parameters{ hash_size = HashSize, key_material_length = KML, expanded_key_material_length = EKML, - iv_size = IVS, - exportable = Exportable}, + iv_size = IVS}, ConnectionStates, Role) -> {ClientWriteMacSecret, ServerWriteMacSecret, ClientWriteKey, ServerWriteKey, ClientIV, ServerIV} = - setup_keys(Version, Exportable, MasterSecret, ServerRandom, + setup_keys(Version, MasterSecret, ServerRandom, ClientRandom, HashSize, KML, EKML, IVS), ?DBG_HEX(ClientWriteKey), ?DBG_HEX(ClientIV), @@ -812,14 +803,7 @@ dec_hs(?SERVER_HELLO, <>, _, _) -> #certificate{asn1_certificates = certs_to_list(ASN1Certs)}; -%% Uncomment if support for export ciphers is added. -%% dec_hs(?SERVER_KEY_EXCHANGE, <>, -%% ?KEY_EXCHANGE_RSA, _) -> -%% #server_key_exchange{params = #server_rsa_params{rsa_modulus = Mod, -%% rsa_exponent = Exp}, -%% signed_params = Sig}; + dec_hs(?SERVER_KEY_EXCHANGE, <>, PreSecret = #encrypted_premaster_secret{premaster_secret = PKEPMS}, #client_key_exchange{exchange_keys = PreSecret}; dec_hs(?CLIENT_KEY_EXCHANGE, <<>>, ?KEY_EXCHANGE_DIFFIE_HELLMAN, _) -> - %% TODO: Should check whether the cert already contains a suitable DH-key (7.4.7.2) - throw(?ALERT_REC(?FATAL, implicit_public_value_encoding)); + throw(?ALERT_REC(?FATAL, ?UNSUPPORTED_CERTIFICATE)); dec_hs(?CLIENT_KEY_EXCHANGE, <>, ?KEY_EXCHANGE_DIFFIE_HELLMAN, _) -> #client_key_exchange{exchange_keys = @@ -953,17 +936,6 @@ enc_hs(#certificate{asn1_certificates = ASN1CertList}, _Version, _) -> ASN1Certs = certs_from_list(ASN1CertList), ACLen = erlang:iolist_size(ASN1Certs), {?CERTIFICATE, <>}; -%% Uncomment if support for export ciphers is added. -%% enc_hs(#server_key_exchange{params = #server_rsa_params{rsa_modulus = Mod, -%% rsa_exponent = Exp}, -%% signed_params = SignedParams}, _Version, _) -> -%% ModLen = byte_size(Mod), -%% ExpLen = byte_size(Exp), -%% SignedLen = byte_size(SignedParams), -%% {?SERVER_KEY_EXCHANGE, <> -%% }; enc_hs(#server_key_exchange{params = #server_dh_params{ dh_p = P, dh_g = G, dh_y = Y}, signed_params = SignedParams}, _Version, _) -> @@ -1073,16 +1045,11 @@ from_2bytes(<>, Acc) -> certificate_types({KeyExchange, _, _, _}) when KeyExchange == rsa; - KeyExchange == dh_dss; - KeyExchange == dh_rsa; KeyExchange == dhe_dss; KeyExchange == dhe_rsa -> <>; certificate_types(_) -> - %%TODO: Is this a good default, - %% is there a case where we like to request - %% a RSA_FIXED_DH or DSS_FIXED_DH <>. certificate_authorities(CertDbRef) -> @@ -1125,22 +1092,16 @@ calc_master_secret({3,N},PremasterSecret, ClientRandom, ServerRandom) when N == 1; N == 2 -> ssl_tls1:master_secret(PremasterSecret, ClientRandom, ServerRandom). -setup_keys({3,0}, Exportable, MasterSecret, +setup_keys({3,0}, MasterSecret, ServerRandom, ClientRandom, HashSize, KML, EKML, IVS) -> - ssl_ssl3:setup_keys(Exportable, MasterSecret, ServerRandom, + ssl_ssl3:setup_keys(MasterSecret, ServerRandom, ClientRandom, HashSize, KML, EKML, IVS); -setup_keys({3,1}, _Exportable, MasterSecret, +setup_keys({3,1}, MasterSecret, ServerRandom, ClientRandom, HashSize, KML, _EKML, IVS) -> ssl_tls1:setup_keys(MasterSecret, ServerRandom, ClientRandom, HashSize, KML, IVS). -%% Uncomment when supported -%% setup_keys({3,2}, _Exportable, MasterSecret, -%% ServerRandom, ClientRandom, HashSize, KML, _EKML, _IVS) -> -%% ssl_tls1:setup_keys(MasterSecret, ServerRandom, -%% ClientRandom, HashSize, KML). - calc_finished({3, 0}, Role, MasterSecret, Hashes) -> ssl_ssl3:finished(Role, MasterSecret, Hashes); calc_finished({3, N}, Role, MasterSecret, Hashes) @@ -1154,7 +1115,6 @@ calc_certificate_verify({3, N}, _, Algorithm, Hashes) ssl_tls1:certificate_verify(Algorithm, Hashes). server_key_exchange_hash(Algorithm, Value) when Algorithm == rsa; - Algorithm == dh_rsa; Algorithm == dhe_rsa -> MD5Context = crypto:md5_init(), NewMD5Context = crypto:md5_update(MD5Context, Value), @@ -1166,9 +1126,7 @@ server_key_exchange_hash(Algorithm, Value) when Algorithm == rsa; <>; -server_key_exchange_hash(Algorithm, Value) when Algorithm == dh_dss; - Algorithm == dhe_dss -> - +server_key_exchange_hash(dhe_dss, Value) -> SHAContext = crypto:sha_init(), NewSHAContext = crypto:sha_update(SHAContext, Value), crypto:sha_final(NewSHAContext). @@ -1176,9 +1134,9 @@ server_key_exchange_hash(Algorithm, Value) when Algorithm == dh_dss; sig_alg(dh_anon) -> ?SIGNATURE_ANONYMOUS; -sig_alg(Alg) when Alg == dhe_rsa; Alg == rsa; Alg == dh_rsa -> +sig_alg(Alg) when Alg == dhe_rsa; Alg == rsa -> ?SIGNATURE_RSA; -sig_alg(Alg) when Alg == dh_dss; Alg == dhe_dss -> +sig_alg(dhe_dss) -> ?SIGNATURE_DSA; sig_alg(_) -> ?NULL. -- cgit v1.2.3