From 70e282c5c2e9a3282475ee330e811a392ff4c378 Mon Sep 17 00:00:00 2001 From: Ingela Anderton Andin Date: Fri, 4 May 2018 17:42:28 +0200 Subject: ssl: Correct key_usage check The Key Usage extension is described in section 4.2.1.3 of X.509, with the following possible flags: KeyUsage ::= BIT STRING { digitalSignature (0), nonRepudiation (1), -- recent editions of X.509 have -- renamed this bit to contentCommitment keyEncipherment (2), dataEncipherment (3), keyAgreement (4), keyCertSign (5), cRLSign (6), encipherOnly (7), decipherOnly (8) } In SSL/TLS, when the server certificate contains a RSA key, then: either a DHE or ECDHE cipher suite is used, in which case the RSA key is used for a signature (see section 7.4.3 of RFC 5246: the "Server Key Exchange" message); this exercises the digitalSignature key usage; or "plain RSA" is used, with a random value (the 48-byte pre-master secret) being encrypted by the client with the server's public key (see section 7.4.7.1 of RFC 5246); this is right in the definition of the keyEncipherment key usage flag. dataEncipherment does not apply, because what is encrypted is not directly meaningful data, but a value which is mostly generated randomly and used to derive symmetric keys. keyAgreement does not apply either, because that one is for key agreement algorithms which are not a case of asymmetric encryption (e.g. Diffie-Hellman). The keyAgreement usage flag would appear in a certificate which contains a DH key, not a RSA key. nonRepudiation is not used, because whatever is signed as part of a SSL/TLS key exchange cannot be used as proof for a third party (there is nothing in a SSL/TLS tunnel that the client could record and then use to convince a judge when tring to sue the server itself; the data which is exchanged within the tunnel is not signed by the server). When a ECDSA key is used then "keyAgreement" flag is needed for beeing ECDH "capable" (as opposed to ephemeral ECDHE) --- lib/ssl/test/ssl_ECC.erl | 44 +++++++++++++++++++++++++++++++------------- 1 file changed, 31 insertions(+), 13 deletions(-) (limited to 'lib/ssl/test') diff --git a/lib/ssl/test/ssl_ECC.erl b/lib/ssl/test/ssl_ECC.erl index 2096cf8166..36d949f74b 100644 --- a/lib/ssl/test/ssl_ECC.erl +++ b/lib/ssl/test/ssl_ECC.erl @@ -34,53 +34,65 @@ %% ECDH_RSA client_ecdh_rsa_server_ecdh_rsa(Config) when is_list(Config) -> + Ext = x509_test:extensions([{key_usage, [keyAgreement]}]), Suites = all_rsa_suites(Config), Default = ssl_test_lib:default_cert_chain_conf(), - {COpts, SOpts} = ssl_test_lib:make_ec_cert_chains([{server_chain, Default}, + {COpts, SOpts} = ssl_test_lib:make_ec_cert_chains([{server_chain, + [[], [], [{extensions, Ext}]]}, {client_chain, Default}], ecdh_rsa, ecdh_rsa, Config), ssl_test_lib:basic_test(ssl_test_lib:ssl_options(COpts, Config), ssl_test_lib:ssl_options(SOpts, Config), [{check_keyex, ecdh_rsa}, {ciphers, Suites} | proplists:delete(check_keyex, Config)]). client_ecdhe_rsa_server_ecdh_rsa(Config) when is_list(Config) -> + Ext = x509_test:extensions([{key_usage, [keyAgreement]}]), Suites = all_rsa_suites(Config), Default = ssl_test_lib:default_cert_chain_conf(), - {COpts, SOpts} = ssl_test_lib:make_ec_cert_chains([{server_chain, Default}, + {COpts, SOpts} = ssl_test_lib:make_ec_cert_chains([{server_chain, + [[], [], [{extensions, Ext}]]}, {client_chain, Default}], ecdhe_rsa, ecdh_rsa, Config), ssl_test_lib:basic_test(ssl_test_lib:ssl_options(COpts, Config), ssl_test_lib:ssl_options(SOpts, Config), [{check_keyex, ecdh_rsa}, {ciphers, Suites} | proplists:delete(check_keyex, Config)]). client_ecdhe_ecdsa_server_ecdh_rsa(Config) when is_list(Config) -> + Ext = x509_test:extensions([{key_usage, [keyAgreement]}]), Suites = all_rsa_suites(Config), Default = ssl_test_lib:default_cert_chain_conf(), - {COpts, SOpts} = ssl_test_lib:make_ec_cert_chains([{server_chain, Default}, + {COpts, SOpts} = ssl_test_lib:make_ec_cert_chains([{server_chain, + [[], [], [{extensions, Ext}]]}, {client_chain, Default}], ecdhe_ecdsa, ecdh_rsa, Config), ssl_test_lib:basic_test(ssl_test_lib:ssl_options(COpts, Config), - ssl_test_lib:ssl_options(SOpts, Config), - [{check_keyex, ecdh_rsa}, {ciphers, Suites} | proplists:delete(check_keyex, Config)]). + ssl_test_lib:ssl_options(SOpts, Config), + [{check_keyex, ecdh_rsa}, {ciphers, Suites} | proplists:delete(check_keyex, Config)]). %% ECDHE_RSA client_ecdh_rsa_server_ecdhe_rsa(Config) when is_list(Config) -> + Ext = x509_test:extensions([{key_usage, [digitalSignature]}]), Default = ssl_test_lib:default_cert_chain_conf(), - {COpts, SOpts} = ssl_test_lib:make_ec_cert_chains([{server_chain, Default}, + {COpts, SOpts} = ssl_test_lib:make_ec_cert_chains([{server_chain, + [[], [], [{extensions, Ext}]]}, {client_chain, Default}], ecdh_rsa, ecdhe_rsa, Config), ssl_test_lib:basic_test(ssl_test_lib:ssl_options(COpts, Config), ssl_test_lib:ssl_options(SOpts, Config), [{check_keyex, ecdhe_rsa} | proplists:delete(check_keyex, Config)]). client_ecdhe_rsa_server_ecdhe_rsa(Config) when is_list(Config) -> + Ext = x509_test:extensions([{key_usage, [digitalSignature]}]), Default = ssl_test_lib:default_cert_chain_conf(), - {COpts, SOpts} = ssl_test_lib:make_ec_cert_chains([{server_chain, Default}, + {COpts, SOpts} = ssl_test_lib:make_ec_cert_chains([{server_chain, + [[], [], [{extensions, Ext}]]}, {client_chain, Default}], ecdhe_rsa, ecdhe_rsa, Config), ssl_test_lib:basic_test(ssl_test_lib:ssl_options(COpts, Config), - ssl_test_lib:ssl_options(SOpts, Config), + ssl_test_lib:ssl_options(SOpts, Config), [{check_keyex, ecdhe_rsa} | proplists:delete(check_keyex, Config)]). client_ecdhe_ecdsa_server_ecdhe_rsa(Config) when is_list(Config) -> + Ext = x509_test:extensions([{key_usage, [digitalSignature]}]), Default = ssl_test_lib:default_cert_chain_conf(), - {COpts, SOpts} = ssl_test_lib:make_ec_cert_chains([{server_chain, Default}, + {COpts, SOpts} = ssl_test_lib:make_ec_cert_chains([{server_chain, + [[], [], [{extensions, Ext}]]}, {client_chain, Default}], ecdh_ecdsa, ecdhe_rsa, Config), ssl_test_lib:basic_test(ssl_test_lib:ssl_options(COpts, Config), @@ -122,24 +134,30 @@ client_ecdhe_ecdsa_server_ecdh_ecdsa(Config) when is_list(Config) -> %% ECDHE_ECDSA client_ecdh_rsa_server_ecdhe_ecdsa(Config) when is_list(Config) -> - Default = ssl_test_lib:default_cert_chain_conf(), - {COpts, SOpts} = ssl_test_lib:make_ec_cert_chains([{server_chain, Default}, + Ext = x509_test:extensions([{key_usage, [digitalSignature]}]), + Default = ssl_test_lib:default_cert_chain_conf(), + {COpts, SOpts} = ssl_test_lib:make_ec_cert_chains([{server_chain, + [[], [], [{extensions, Ext}]]}, {client_chain, Default}], ecdh_rsa, ecdhe_ecdsa, Config), ssl_test_lib:basic_test(ssl_test_lib:ssl_options(COpts, Config), ssl_test_lib:ssl_options(SOpts, Config), [{check_keyex, ecdhe_ecdsa} | proplists:delete(check_keyex, Config)]). client_ecdh_ecdsa_server_ecdhe_ecdsa(Config) when is_list(Config) -> + Ext = x509_test:extensions([{key_usage, [digitalSignature]}]), Default = ssl_test_lib:default_cert_chain_conf(), - {COpts, SOpts} = ssl_test_lib:make_ec_cert_chains([{server_chain, Default}, + {COpts, SOpts} = ssl_test_lib:make_ec_cert_chains([{server_chain, + [[], [], [{extensions, Ext}]]}, {client_chain, Default}], ecdh_ecdsa, ecdhe_ecdsa, Config), ssl_test_lib:basic_test(ssl_test_lib:ssl_options(COpts, Config), ssl_test_lib:ssl_options(SOpts, Config), [{check_keyex, ecdhe_ecdsa} | proplists:delete(check_keyex, Config)]). client_ecdhe_ecdsa_server_ecdhe_ecdsa(Config) when is_list(Config) -> + Ext = x509_test:extensions([{key_usage, [digitalSignature]}]), Default = ssl_test_lib:default_cert_chain_conf(), - {COpts, SOpts} = ssl_test_lib:make_ec_cert_chains([{server_chain, Default}, + {COpts, SOpts} = ssl_test_lib:make_ec_cert_chains([{server_chain, + [[], [], [{extensions, Ext}]]}, {client_chain, Default}], ecdhe_ecdsa, ecdhe_ecdsa, Config), ssl_test_lib:basic_test(ssl_test_lib:ssl_options(COpts, Config), -- cgit v1.2.3