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-rw-r--r--lib/ssl/src/dtls_handshake.erl6
-rw-r--r--lib/ssl/src/ssl.erl18
-rw-r--r--lib/ssl/src/ssl_cipher.erl364
-rw-r--r--lib/ssl/src/ssl_config.erl14
-rw-r--r--lib/ssl/src/ssl_connection.erl31
-rw-r--r--lib/ssl/src/ssl_handshake.erl145
-rw-r--r--lib/ssl/src/tls_connection.erl3
7 files changed, 339 insertions, 242 deletions
diff --git a/lib/ssl/src/dtls_handshake.erl b/lib/ssl/src/dtls_handshake.erl
index 6071eece13..1a415a5f76 100644
--- a/lib/ssl/src/dtls_handshake.erl
+++ b/lib/ssl/src/dtls_handshake.erl
@@ -174,7 +174,9 @@ handle_client_hello(Version,
signature_algs = ClientHashSigns}
= HelloExt},
#ssl_options{versions = Versions,
- signature_algs = SupportedHashSigns} = SslOpts,
+ signature_algs = SupportedHashSigns,
+ eccs = SupportedECCs,
+ honor_ecc_order = ECCOrder} = SslOpts,
{Port, Session0, Cache, CacheCb, ConnectionStates0, Cert, _},
Renegotiation) ->
case dtls_record:is_acceptable_version(Version, Versions) of
@@ -182,7 +184,7 @@ handle_client_hello(Version,
TLSVersion = dtls_v1:corresponding_tls_version(Version),
AvailableHashSigns = ssl_handshake:available_signature_algs(
ClientHashSigns, SupportedHashSigns, Cert,TLSVersion),
- ECCCurve = ssl_handshake:select_curve(Curves, ssl_handshake:supported_ecc(TLSVersion)),
+ ECCCurve = ssl_handshake:select_curve(Curves, SupportedECCs, ECCOrder),
{Type, #session{cipher_suite = CipherSuite} = Session1}
= ssl_handshake:select_session(SugesstedId, CipherSuites,
AvailableHashSigns, Compressions,
diff --git a/lib/ssl/src/ssl.erl b/lib/ssl/src/ssl.erl
index fb4448e180..f5d7c3dc00 100644
--- a/lib/ssl/src/ssl.erl
+++ b/lib/ssl/src/ssl.erl
@@ -476,8 +476,9 @@ eccs() ->
eccs_filter_supported(Curves).
%%--------------------------------------------------------------------
--spec eccs(tls_record:tls_version() | tls_record:tls_atom_version()) ->
- tls_v1:curves().
+-spec eccs(tls_record:tls_version() | tls_record:tls_atom_version() |
+ dtls_record:dtls_version() | dtls_record:dtls_atom_version()) ->
+ tls_v1:curves().
%% Description: returns the curves supported for a given version of
%% ssl/tls.
%%--------------------------------------------------------------------
@@ -486,8 +487,17 @@ eccs({3,0}) ->
eccs({3,_}) ->
Curves = tls_v1:ecc_curves(all),
eccs_filter_supported(Curves);
-eccs(AtomVersion) when is_atom(AtomVersion) ->
- eccs(tls_record:protocol_version(AtomVersion)).
+
+eccs({254,_} = Version) ->
+ eccs(dtls_v1:corresponding_tls_version(Version));
+eccs(Version) when Version == 'tlsv1.2';
+ Version == 'tlsv1.1';
+ Version == tlsv1;
+ Version == sslv3 ->
+ eccs(tls_record:protocol_version(Version));
+eccs(Version) when Version == 'dtlsv1.2';
+ Version == 'dtlsv1'->
+ eccs(dtls_v1:corresponding_tls_version(dtls_record:protocol_version(Version))).
eccs_filter_supported(Curves) ->
CryptoCurves = crypto:ec_curves(),
diff --git a/lib/ssl/src/ssl_cipher.erl b/lib/ssl/src/ssl_cipher.erl
index 59cf05fd42..aa453fe3f1 100644
--- a/lib/ssl/src/ssl_cipher.erl
+++ b/lib/ssl/src/ssl_cipher.erl
@@ -36,10 +36,11 @@
-export([security_parameters/2, security_parameters/3, suite_definition/1,
erl_suite_definition/1,
cipher_init/3, decipher/6, cipher/5, decipher_aead/6, cipher_aead/6,
- suite/1, suites/1, all_suites/1, crypto_support_filters/0,
- ec_keyed_suites/0, anonymous_suites/1, psk_suites/1, psk_suites_anon/1, srp_suites/0,
- srp_suites_anon/0, rc4_suites/1, des_suites/1, openssl_suite/1, openssl_suite_name/1,
- filter/2, filter_suites/1, filter_suites/2,
+ suite/1, suites/1, all_suites/1, crypto_support_filters/0,
+ anonymous_suites/1, psk_suites/1, psk_suites_anon/1,
+ srp_suites/0, srp_suites_anon/0,
+ rc4_suites/1, des_suites/1, openssl_suite/1, openssl_suite_name/1,
+ filter/3, filter_suites/1, filter_suites/2,
hash_algorithm/1, sign_algorithm/1, is_acceptable_hash/2, is_fallback/1,
random_bytes/1, calc_mac_hash/4,
is_stream_ciphersuite/1]).
@@ -2016,39 +2017,25 @@ openssl_suite_name(Cipher) ->
suite_definition(Cipher).
%%--------------------------------------------------------------------
--spec filter(undefined | binary(), [cipher_suite()]) -> [cipher_suite()].
+-spec filter(undefined | binary(), [cipher_suite()], ssl_record:ssl_version()) -> [cipher_suite()].
%%
%% Description: Select the cipher suites that can be used together with the
%% supplied certificate. (Server side functionality)
%%-------------------------------------------------------------------
-filter(undefined, Ciphers) ->
+filter(undefined, Ciphers, _) ->
Ciphers;
-filter(DerCert, Ciphers) ->
+filter(DerCert, Ciphers0, Version) ->
OtpCert = public_key:pkix_decode_cert(DerCert, otp),
SigAlg = OtpCert#'OTPCertificate'.signatureAlgorithm,
PubKeyInfo = OtpCert#'OTPCertificate'.tbsCertificate#'OTPTBSCertificate'.subjectPublicKeyInfo,
PubKeyAlg = PubKeyInfo#'OTPSubjectPublicKeyInfo'.algorithm,
- Ciphers1 =
- case ssl_certificate:public_key_type(PubKeyAlg#'PublicKeyAlgorithm'.algorithm) of
- rsa ->
- filter_keyuse(OtpCert, ((Ciphers -- dsa_signed_suites()) -- ec_keyed_suites()) -- ecdh_suites(),
- rsa_suites(), dhe_rsa_suites() ++ ecdhe_rsa_suites());
- dsa ->
- (Ciphers -- rsa_keyed_suites()) -- ec_keyed_suites();
- ec ->
- filter_keyuse(OtpCert, (Ciphers -- rsa_keyed_suites()) -- dsa_signed_suites(),
- [], ecdhe_ecdsa_suites())
- end,
-
- case public_key:pkix_sign_types(SigAlg#'SignatureAlgorithm'.algorithm) of
- {_, rsa} ->
- Ciphers1 -- ecdsa_signed_suites();
- {_, dsa} ->
- Ciphers1;
- {_, ecdsa} ->
- Ciphers1 -- rsa_signed_suites()
- end.
+ Ciphers = filter_suites_pubkey(
+ ssl_certificate:public_key_type(PubKeyAlg#'PublicKeyAlgorithm'.algorithm),
+ Ciphers0, Version, OtpCert),
+ {_, Sign} = public_key:pkix_sign_types(SigAlg#'SignatureAlgorithm'.algorithm),
+ filter_suites_signature(Sign, Ciphers, Version).
+
%%--------------------------------------------------------------------
-spec filter_suites([erl_cipher_suite()] | [cipher_suite()], map()) ->
[erl_cipher_suite()] | [cipher_suite()].
@@ -2479,143 +2466,214 @@ next_iv(Bin, IV) ->
<<_:FirstPart/binary, NextIV:IVSz/binary>> = Bin,
NextIV.
-rsa_signed_suites() ->
- dhe_rsa_suites() ++ rsa_suites() ++
- psk_rsa_suites() ++ srp_rsa_suites() ++
- ecdh_rsa_suites() ++ ecdhe_rsa_suites().
-
-rsa_keyed_suites() ->
- dhe_rsa_suites() ++ rsa_suites() ++
- psk_rsa_suites() ++ srp_rsa_suites() ++
- ecdhe_rsa_suites().
-
-dhe_rsa_suites() ->
- [?TLS_DHE_RSA_WITH_AES_256_CBC_SHA256,
- ?TLS_DHE_RSA_WITH_AES_256_CBC_SHA,
- ?TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA,
- ?TLS_DHE_RSA_WITH_AES_128_CBC_SHA256,
- ?TLS_DHE_RSA_WITH_AES_128_CBC_SHA,
- ?TLS_DHE_RSA_WITH_DES_CBC_SHA,
- ?TLS_DHE_RSA_WITH_AES_128_GCM_SHA256,
- ?TLS_DHE_RSA_WITH_AES_256_GCM_SHA384,
- ?TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256
- ].
-
-psk_rsa_suites() ->
- [?TLS_RSA_PSK_WITH_AES_256_GCM_SHA384,
- ?TLS_RSA_PSK_WITH_AES_128_GCM_SHA256,
- ?TLS_RSA_PSK_WITH_AES_256_CBC_SHA384,
- ?TLS_RSA_PSK_WITH_AES_128_CBC_SHA256,
- ?TLS_RSA_PSK_WITH_AES_256_CBC_SHA,
- ?TLS_RSA_PSK_WITH_AES_128_CBC_SHA,
- ?TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA,
- ?TLS_RSA_PSK_WITH_RC4_128_SHA].
-
-srp_rsa_suites() ->
- [?TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA,
- ?TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA,
- ?TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA].
-
-rsa_suites() ->
- [?TLS_RSA_WITH_AES_256_CBC_SHA256,
- ?TLS_RSA_WITH_AES_256_CBC_SHA,
- ?TLS_RSA_WITH_3DES_EDE_CBC_SHA,
- ?TLS_RSA_WITH_AES_128_CBC_SHA256,
- ?TLS_RSA_WITH_AES_128_CBC_SHA,
- ?TLS_RSA_WITH_RC4_128_SHA,
- ?TLS_RSA_WITH_RC4_128_MD5,
- ?TLS_RSA_WITH_DES_CBC_SHA,
- ?TLS_RSA_WITH_AES_128_GCM_SHA256,
- ?TLS_RSA_WITH_AES_256_GCM_SHA384].
-
-ecdh_rsa_suites() ->
- [?TLS_ECDH_RSA_WITH_NULL_SHA,
- ?TLS_ECDH_RSA_WITH_RC4_128_SHA,
- ?TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA,
- ?TLS_ECDH_RSA_WITH_AES_128_CBC_SHA,
- ?TLS_ECDH_RSA_WITH_AES_256_CBC_SHA,
- ?TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256,
- ?TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384,
- ?TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256,
- ?TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384].
-
-ecdhe_rsa_suites() ->
- [?TLS_ECDHE_RSA_WITH_NULL_SHA,
- ?TLS_ECDHE_RSA_WITH_RC4_128_SHA,
- ?TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,
- ?TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
- ?TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
- ?TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
- ?TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384,
- ?TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
- ?TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
- ?TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256].
-
-dsa_signed_suites() ->
- dhe_dss_suites() ++ srp_dss_suites().
-
-dhe_dss_suites() ->
- [?TLS_DHE_DSS_WITH_AES_256_CBC_SHA256,
- ?TLS_DHE_DSS_WITH_AES_256_CBC_SHA,
- ?TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA,
- ?TLS_DHE_DSS_WITH_AES_128_CBC_SHA256,
- ?TLS_DHE_DSS_WITH_AES_128_CBC_SHA,
- ?TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA,
- ?TLS_DHE_DSS_WITH_AES_128_GCM_SHA256,
- ?TLS_DHE_DSS_WITH_AES_256_GCM_SHA384].
-
-srp_dss_suites() ->
- [?TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA,
- ?TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA,
- ?TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA].
+filter_suites_pubkey(rsa, CiphersSuites0, _Version, OtpCert) ->
+ KeyUses = key_uses(OtpCert),
+ NotECDSAKeyed = (CiphersSuites0 -- ec_keyed_suites(CiphersSuites0))
+ -- dss_keyed_suites(CiphersSuites0),
+ CiphersSuites = filter_keyuse_suites(keyEncipherment, KeyUses,
+ NotECDSAKeyed,
+ rsa_suites_encipher(CiphersSuites0)),
+ filter_keyuse_suites(digitalSignature, KeyUses, CiphersSuites,
+ rsa_ecdhe_dhe_suites(CiphersSuites));
+filter_suites_pubkey(dsa, Ciphers, _, OtpCert) ->
+ KeyUses = key_uses(OtpCert),
+ NotECRSAKeyed = (Ciphers -- rsa_keyed_suites(Ciphers)) -- ec_keyed_suites(Ciphers),
+ filter_keyuse_suites(digitalSignature, KeyUses, NotECRSAKeyed,
+ dss_dhe_suites(Ciphers));
+filter_suites_pubkey(ec, Ciphers, _, OtpCert) ->
+ Uses = key_uses(OtpCert),
+ NotRSADSAKeyed = (Ciphers -- rsa_keyed_suites(Ciphers)) -- dss_keyed_suites(Ciphers),
+ CiphersSuites = filter_keyuse_suites(digitalSignature, Uses, NotRSADSAKeyed,
+ ec_ecdhe_suites(Ciphers)),
+ filter_keyuse_suites(keyAgreement, Uses, CiphersSuites, ec_ecdh_suites(Ciphers)).
+
+filter_suites_signature(rsa, Ciphers, {3, N}) when N >= 3 ->
+ Ciphers;
+filter_suites_signature(rsa, Ciphers, Version) ->
+ (Ciphers -- ecdsa_signed_suites(Ciphers, Version)) -- dsa_signed_suites(Ciphers, Version);
+filter_suites_signature(dsa, Ciphers, Version) ->
+ (Ciphers -- ecdsa_signed_suites(Ciphers, Version)) -- rsa_signed_suites(Ciphers, Version);
+filter_suites_signature(ecdsa, Ciphers, Version) ->
+ (Ciphers -- rsa_signed_suites(Ciphers, Version)) -- dsa_signed_suites(Ciphers, Version).
+
+
+%% From RFC 5246 - Section 7.4.2. Server Certificate
+%% If the client provided a "signature_algorithms" extension, then all
+%% certificates provided by the server MUST be signed by a
+%% hash/signature algorithm pair that appears in that extension. Note
+%% that this implies that a certificate containing a key for one
+%% signature algorithm MAY be signed using a different signature
+%% algorithm (for instance, an RSA key signed with a DSA key). This is
+%% a departure from TLS 1.1, which required that the algorithms be the
+%% same.
+%% Note that this also implies that the DH_DSS, DH_RSA,
+%% ECDH_ECDSA, and ECDH_RSA key exchange algorithms do not restrict the
+%% algorithm used to sign the certificate. Fixed DH certificates MAY be
+%% signed with any hash/signature algorithm pair appearing in the
+%% extension. The names DH_DSS, DH_RSA, ECDH_ECDSA, and ECDH_RSA are
+%% historical.
+%% Note: DH_DSS and DH_RSA is not supported
+rsa_signed({3,N}) when N >= 3 ->
+ fun(rsa) -> true;
+ (dhe_rsa) -> true;
+ (ecdhe_rsa) -> true;
+ (rsa_psk) -> true;
+ (srp_rsa) -> true;
+ (_) -> false
+ end;
+rsa_signed(_) ->
+ fun(rsa) -> true;
+ (dhe_rsa) -> true;
+ (ecdhe_rsa) -> true;
+ (ecdh_rsa) -> true;
+ (rsa_psk) -> true;
+ (srp_rsa) -> true;
+ (_) -> false
+ end.
+%% Cert should be signed by RSA
+rsa_signed_suites(Ciphers, Version) ->
+ filter_suites(Ciphers, #{key_exchange_filters => [rsa_signed(Version)],
+ cipher_filters => [],
+ mac_filters => [],
+ prf_filters => []}).
+ecdsa_signed({3,N}) when N >= 3 ->
+ fun(ecdhe_ecdsa) -> true;
+ (_) -> false
+ end;
+ecdsa_signed(_) ->
+ fun(ecdhe_ecdsa) -> true;
+ (ecdh_ecdsa) -> true;
+ (_) -> false
+ end.
+
+%% Cert should be signed by ECDSA
+ecdsa_signed_suites(Ciphers, Version) ->
+ filter_suites(Ciphers, #{key_exchange_filters => [ecdsa_signed(Version)],
+ cipher_filters => [],
+ mac_filters => [],
+ prf_filters => []}).
+
+rsa_keyed(dhe_rsa) ->
+ true;
+rsa_keyed(ecdhe_rsa) ->
+ true;
+rsa_keyed(rsa) ->
+ true;
+rsa_keyed(rsa_psk) ->
+ true;
+rsa_keyed(srp_rsa) ->
+ true;
+rsa_keyed(_) ->
+ false.
-ec_keyed_suites() ->
- ecdh_ecdsa_suites() ++ ecdhe_ecdsa_suites()
- ++ ecdh_rsa_suites().
+%% Certs key is an RSA key
+rsa_keyed_suites(Ciphers) ->
+ filter_suites(Ciphers, #{key_exchange_filters => [fun(Kex) -> rsa_keyed(Kex) end],
+ cipher_filters => [],
+ mac_filters => [],
+ prf_filters => []}).
+
+%% RSA Certs key can be used for encipherment
+rsa_suites_encipher(Ciphers) ->
+ filter_suites(Ciphers, #{key_exchange_filters => [fun(rsa) -> true;
+ (rsa_psk) -> true;
+ (_) -> false
+ end],
+ cipher_filters => [],
+ mac_filters => [],
+ prf_filters => []}).
+
+dss_keyed(dhe_dss) ->
+ true;
+dss_keyed(spr_dss) ->
+ true;
+dss_keyed(_) ->
+ false.
+
+%% Cert should be have DSS key (DSA)
+dss_keyed_suites(Ciphers) ->
+ filter_suites(Ciphers, #{key_exchange_filters => [fun(Kex) -> dss_keyed(Kex) end],
+ cipher_filters => [],
+ mac_filters => [],
+ prf_filters => []}).
+
+%% Cert should be signed by DSS (DSA)
+dsa_signed_suites(Ciphers, Version) ->
+ filter_suites(Ciphers, #{key_exchange_filters => [dsa_signed(Version)],
+ cipher_filters => [],
+ mac_filters => [],
+ prf_filters => []}).
+dsa_signed(_) ->
+ fun(dhe_dss) -> true;
+ (_) -> false
+ end.
-ecdsa_signed_suites() ->
- ecdh_ecdsa_suites() ++ ecdhe_ecdsa_suites().
+dss_dhe_suites(Ciphers) ->
+ filter_suites(Ciphers, #{key_exchange_filters => [fun(dhe_dss) -> true;
+ (_) -> false
+ end],
+ cipher_filters => [],
+ mac_filters => [],
+ prf_filters => []}).
-ecdh_suites() ->
- ecdh_rsa_suites() ++ ecdh_ecdsa_suites().
+ec_keyed(ecdh_ecdsa) ->
+ true;
+ec_keyed(ecdh_rsa) ->
+ true;
+ec_keyed(ecdhe_ecdsa) ->
+ true;
+ec_keyed(_) ->
+ false.
-ecdh_ecdsa_suites() ->
- [?TLS_ECDH_ECDSA_WITH_NULL_SHA,
- ?TLS_ECDH_ECDSA_WITH_RC4_128_SHA,
- ?TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA,
- ?TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA,
- ?TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA,
- ?TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256,
- ?TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384,
- ?TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256,
- ?TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384].
-
-ecdhe_ecdsa_suites() ->
- [?TLS_ECDHE_ECDSA_WITH_NULL_SHA,
- ?TLS_ECDHE_ECDSA_WITH_RC4_128_SHA,
- ?TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA,
- ?TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
- ?TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
- ?TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
- ?TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384,
- ?TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
- ?TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
- ?TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256].
-
-filter_keyuse(OtpCert, Ciphers, Suites, SignSuites) ->
+%% Certs key is an ECC key
+ec_keyed_suites(Ciphers) ->
+ filter_suites(Ciphers, #{key_exchange_filters => [fun(Kex) -> ec_keyed(Kex) end],
+ cipher_filters => [],
+ mac_filters => [],
+ prf_filters => []}).
+
+%% EC Certs key usage keyAgreement
+ec_ecdh_suites(Ciphers)->
+ filter_suites(Ciphers, #{key_exchange_filters => [fun(ecdh_ecdsa) -> true;
+ (_) -> false
+ end],
+ cipher_filters => [],
+ mac_filters => [],
+ prf_filters => []}).
+
+%% EC Certs key usage digitalSignature
+ec_ecdhe_suites(Ciphers) ->
+ filter_suites(Ciphers, #{key_exchange_filters => [fun(ecdhe_ecdsa) -> true;
+ (ecdhe_rsa) -> true;
+ (_) -> false
+ end],
+ cipher_filters => [],
+ mac_filters => [],
+ prf_filters => []}).
+%% RSA Certs key usage digitalSignature
+rsa_ecdhe_dhe_suites(Ciphers) ->
+ filter_suites(Ciphers, #{key_exchange_filters => [fun(dhe_rsa) -> true;
+ (ecdhe_rsa) -> true;
+ (_) -> false
+ end],
+ cipher_filters => [],
+ mac_filters => [],
+ prf_filters => []}).
+
+key_uses(OtpCert) ->
TBSCert = OtpCert#'OTPCertificate'.tbsCertificate,
TBSExtensions = TBSCert#'OTPTBSCertificate'.extensions,
Extensions = ssl_certificate:extensions_list(TBSExtensions),
case ssl_certificate:select_extension(?'id-ce-keyUsage', Extensions) of
undefined ->
- Ciphers;
- #'Extension'{extnValue = KeyUse} ->
- Result = filter_keyuse_suites(keyEncipherment,
- KeyUse, Ciphers, Suites),
- filter_keyuse_suites(digitalSignature,
- KeyUse, Result, SignSuites)
+ [];
+ #'Extension'{extnValue = KeyUses} ->
+ KeyUses
end.
+%% If no key-usage extension is defined all key-usages are allowed
+filter_keyuse_suites(_, [], CiphersSuites, _) ->
+ CiphersSuites;
filter_keyuse_suites(Use, KeyUse, CipherSuits, Suites) ->
case ssl_certificate:is_valid_key_usage(KeyUse, Use) of
true ->
diff --git a/lib/ssl/src/ssl_config.erl b/lib/ssl/src/ssl_config.erl
index 022fb7eac0..028721341c 100644
--- a/lib/ssl/src/ssl_config.erl
+++ b/lib/ssl/src/ssl_config.erl
@@ -91,9 +91,9 @@ init_certificates(undefined, #{pem_cache := PemCache} = Config, CertFile, server
end;
init_certificates(Cert, Config, _, _) ->
{ok, Config#{own_certificate => Cert}}.
-init_private_key(_, #{algorithm := Alg} = Key, <<>>, _Password, _Client) when Alg == ecdsa;
- Alg == rsa;
- Alg == dss ->
+init_private_key(_, #{algorithm := Alg} = Key, _, _Password, _Client) when Alg == ecdsa;
+ Alg == rsa;
+ Alg == dss ->
case maps:is_key(engine, Key) andalso maps:is_key(key_id, Key) of
true ->
Key;
@@ -132,7 +132,13 @@ private_key(#'PrivateKeyInfo'{privateKeyAlgorithm =
#'PrivateKeyInfo_privateKeyAlgorithm'{algorithm = ?'id-dsa'},
privateKey = Key}) ->
public_key:der_decode('DSAPrivateKey', iolist_to_binary(Key));
-
+private_key(#'PrivateKeyInfo'{privateKeyAlgorithm =
+ #'PrivateKeyInfo_privateKeyAlgorithm'{algorithm = ?'id-ecPublicKey',
+ parameters = {asn1_OPENTYPE, Parameters}},
+ privateKey = Key}) ->
+ ECKey = public_key:der_decode('ECPrivateKey', iolist_to_binary(Key)),
+ ECParameters = public_key:der_decode('EcpkParameters', Parameters),
+ ECKey#'ECPrivateKey'{parameters = ECParameters};
private_key(Key) ->
Key.
diff --git a/lib/ssl/src/ssl_connection.erl b/lib/ssl/src/ssl_connection.erl
index 64ecc29b97..94e756d5f6 100644
--- a/lib/ssl/src/ssl_connection.erl
+++ b/lib/ssl/src/ssl_connection.erl
@@ -681,6 +681,7 @@ certify(internal, #server_key_exchange{exchange_keys = Keys},
#state{role = client, negotiated_version = Version,
key_algorithm = Alg,
public_key_info = PubKeyInfo,
+ session = Session,
connection_states = ConnectionStates} = State, Connection)
when Alg == dhe_dss; Alg == dhe_rsa;
Alg == ecdhe_rsa; Alg == ecdhe_ecdsa;
@@ -702,7 +703,8 @@ certify(internal, #server_key_exchange{exchange_keys = Keys},
ConnectionStates, ssl:tls_version(Version), PubKeyInfo) of
true ->
calculate_secret(Params#server_key_params.params,
- State#state{hashsign_algorithm = HashSign},
+ State#state{hashsign_algorithm = HashSign,
+ session = session_handle_params(Params#server_key_params.params, Session)},
Connection);
false ->
handle_own_alert(?ALERT_REC(?FATAL, ?DECRYPT_ERROR),
@@ -1244,7 +1246,7 @@ connection_info(#state{sni_hostname = SNIHostname,
RecordCB = record_cb(Connection),
CipherSuiteDef = #{key_exchange := KexAlg} = ssl_cipher:suite_definition(CipherSuite),
IsNamedCurveSuite = lists:member(KexAlg,
- [ecdh_ecdsa, ecdhe_ecdsa, ecdh_anon]),
+ [ecdh_ecdsa, ecdhe_ecdsa, ecdh_rsa, ecdhe_rsa, ecdh_anon]),
CurveInfo = case ECCCurve of
{namedCurve, Curve} when IsNamedCurveSuite ->
[{ecc, {named_curve, pubkey_cert_records:namedCurves(Curve)}}];
@@ -1344,11 +1346,12 @@ handle_peer_cert(Role, PeerCert, PublicKeyInfo,
handle_peer_cert_key(client, _,
{?'id-ecPublicKey', #'ECPoint'{point = _ECPoint} = PublicKey,
PublicKeyParams},
- KeyAlg, State) when KeyAlg == ecdh_rsa;
- KeyAlg == ecdh_ecdsa ->
+ KeyAlg, #state{session = Session} = State) when KeyAlg == ecdh_rsa;
+ KeyAlg == ecdh_ecdsa ->
ECDHKey = public_key:generate_key(PublicKeyParams),
PremasterSecret = ssl_handshake:premaster_secret(PublicKey, ECDHKey),
- master_secret(PremasterSecret, State#state{diffie_hellman_keys = ECDHKey});
+ master_secret(PremasterSecret, State#state{diffie_hellman_keys = ECDHKey,
+ session = Session#session{ecc = PublicKeyParams}});
%% We do currently not support cipher suites that use fixed DH.
%% If we want to implement that the following clause can be used
%% to extract DH parameters form cert.
@@ -1516,9 +1519,11 @@ key_exchange(#state{role = server, key_algorithm = Algo,
PrivateKey}),
State = Connection:queue_handshake(Msg, State0),
State#state{diffie_hellman_keys = DHKeys};
-key_exchange(#state{role = server, private_key = Key, key_algorithm = Algo} = State, _)
+key_exchange(#state{role = server, private_key = #'ECPrivateKey'{parameters = ECCurve} = Key, key_algorithm = Algo,
+ session = Session} = State, _)
when Algo == ecdh_ecdsa; Algo == ecdh_rsa ->
- State#state{diffie_hellman_keys = Key};
+ State#state{diffie_hellman_keys = Key,
+ session = Session#session{ecc = ECCurve}};
key_exchange(#state{role = server, key_algorithm = Algo,
hashsign_algorithm = HashSignAlgo,
private_key = PrivateKey,
@@ -1653,12 +1658,13 @@ key_exchange(#state{role = client,
key_exchange(#state{role = client,
key_algorithm = Algorithm,
negotiated_version = Version,
- diffie_hellman_keys = Keys} = State0, Connection)
+ session = Session,
+ diffie_hellman_keys = #'ECPrivateKey'{parameters = ECCurve} = Key} = State0, Connection)
when Algorithm == ecdhe_ecdsa; Algorithm == ecdhe_rsa;
Algorithm == ecdh_ecdsa; Algorithm == ecdh_rsa;
Algorithm == ecdh_anon ->
- Msg = ssl_handshake:key_exchange(client, ssl:tls_version(Version), {ecdh, Keys}),
- Connection:queue_handshake(Msg, State0);
+ Msg = ssl_handshake:key_exchange(client, ssl:tls_version(Version), {ecdh, Key}),
+ Connection:queue_handshake(Msg, State0#state{session = Session#session{ecc = ECCurve}});
key_exchange(#state{role = client,
ssl_options = SslOpts,
key_algorithm = psk,
@@ -2134,6 +2140,11 @@ cancel_timer(Timer) ->
erlang:cancel_timer(Timer),
ok.
+session_handle_params(#server_ecdh_params{curve = ECCurve}, Session) ->
+ Session#session{ecc = ECCurve};
+session_handle_params(_, Session) ->
+ Session.
+
register_session(client, Host, Port, #session{is_resumable = new} = Session0) ->
Session = Session0#session{is_resumable = true},
ssl_manager:register_session(Host, Port, Session),
diff --git a/lib/ssl/src/ssl_handshake.erl b/lib/ssl/src/ssl_handshake.erl
index 8b1ea52ac9..c5a87e28bc 100644
--- a/lib/ssl/src/ssl_handshake.erl
+++ b/lib/ssl/src/ssl_handshake.erl
@@ -759,11 +759,12 @@ available_suites(UserSuites, Version) ->
lists:filtermap(fun(Suite) -> lists:member(Suite, VersionSuites) end, UserSuites).
available_suites(ServerCert, UserSuites, Version, undefined, Curve) ->
- ssl_cipher:filter(ServerCert, available_suites(UserSuites, Version))
- -- unavailable_ecc_suites(Curve);
+ Suites = ssl_cipher:filter(ServerCert, available_suites(UserSuites, Version), Version),
+ filter_unavailable_ecc_suites(Curve, Suites);
available_suites(ServerCert, UserSuites, Version, HashSigns, Curve) ->
Suites = available_suites(ServerCert, UserSuites, Version, undefined, Curve),
- filter_hashsigns(Suites, [ssl_cipher:suite_definition(Suite) || Suite <- Suites], HashSigns, []).
+ filter_hashsigns(Suites, [ssl_cipher:suite_definition(Suite) || Suite <- Suites], HashSigns,
+ Version, []).
available_signature_algs(undefined, _) ->
undefined;
@@ -801,7 +802,7 @@ prf({3,0}, _, _, _, _, _) ->
prf({3,_N}, PRFAlgo, Secret, Label, Seed, WantedLength) ->
{ok, tls_v1:prf(PRFAlgo, Secret, Label, Seed, WantedLength)}.
-select_session(SuggestedSessionId, CipherSuites, HashSigns, Compressions, Port, #session{ecc = ECCCurve} =
+select_session(SuggestedSessionId, CipherSuites, HashSigns, Compressions, Port, #session{ecc = ECCCurve0} =
Session, Version,
#ssl_options{ciphers = UserSuites, honor_cipher_order = HonorCipherOrder} = SslOpts,
Cache, CacheCb, Cert) ->
@@ -810,10 +811,12 @@ select_session(SuggestedSessionId, CipherSuites, HashSigns, Compressions, Port,
Cache, CacheCb),
case Resumed of
undefined ->
- Suites = available_suites(Cert, UserSuites, Version, HashSigns, ECCCurve),
- CipherSuite = select_cipher_suite(CipherSuites, Suites, HonorCipherOrder),
+ Suites = available_suites(Cert, UserSuites, Version, HashSigns, ECCCurve0),
+ CipherSuite0 = select_cipher_suite(CipherSuites, Suites, HonorCipherOrder),
+ {ECCCurve, CipherSuite} = cert_curve(Cert, ECCCurve0, CipherSuite0),
Compression = select_compression(Compressions),
{new, Session#session{session_id = SessionId,
+ ecc = ECCCurve,
cipher_suite = CipherSuite,
compression_method = Compression}};
_ ->
@@ -895,6 +898,13 @@ premaster_secret(EncSecret, #'RSAPrivateKey'{} = RSAPrivateKey) ->
catch
_:_ ->
throw(?ALERT_REC(?FATAL, ?DECRYPT_ERROR))
+ end;
+premaster_secret(EncSecret, #{algorithm := rsa} = Engine) ->
+ try crypto:private_decrypt(rsa, EncSecret, maps:remove(algorithm, Engine),
+ [{rsa_pad, rsa_pkcs1_padding}])
+ catch
+ _:_ ->
+ throw(?ALERT_REC(?FATAL, ?DECRYPT_ERROR))
end.
%%====================================================================
%% Extensions handling
@@ -1026,7 +1036,8 @@ select_curve(undefined, _, _) ->
%%--------------------------------------------------------------------
select_hashsign(_, _, KeyExAlgo, _, _Version) when KeyExAlgo == dh_anon;
KeyExAlgo == ecdh_anon;
- KeyExAlgo == srp_anon ->
+ KeyExAlgo == srp_anon;
+ KeyExAlgo == psk ->
{null, anon};
%% The signature_algorithms extension was introduced with TLS 1.2. Ignore it if we have
%% negotiated a lower version.
@@ -1035,17 +1046,14 @@ select_hashsign(HashSigns, Cert, KeyExAlgo,
select_hashsign(HashSigns, Cert, KeyExAlgo, tls_v1:default_signature_algs(Version), Version);
select_hashsign(#hash_sign_algos{hash_sign_algos = HashSigns}, Cert, KeyExAlgo, SupportedHashSigns,
{Major, Minor}) when Major >= 3 andalso Minor >= 3 ->
- #'OTPCertificate'{tbsCertificate = TBSCert,
- signatureAlgorithm = {_,SignAlgo, _}} = public_key:pkix_decode_cert(Cert, otp),
+ #'OTPCertificate'{tbsCertificate = TBSCert} = public_key:pkix_decode_cert(Cert, otp),
#'OTPSubjectPublicKeyInfo'{algorithm = {_, SubjAlgo, _}} =
TBSCert#'OTPTBSCertificate'.subjectPublicKeyInfo,
- Sign = sign_algo(SignAlgo),
- SubSing = sign_algo(SubjAlgo),
-
- case lists:filter(fun({_, S} = Algos) when S == Sign ->
- is_acceptable_hash_sign(Algos, Sign,
- SubSing, KeyExAlgo, SupportedHashSigns);
+ SubSign = sign_algo(SubjAlgo),
+
+ case lists:filter(fun({_, S} = Algos) when S == SubSign ->
+ is_acceptable_hash_sign(Algos, KeyExAlgo, SupportedHashSigns);
(_) ->
false
end, HashSigns) of
@@ -1849,7 +1857,7 @@ dec_hello_extensions(<<?UINT16(?EC_POINT_FORMATS_EXT), ?UINT16(Len),
ECPointFormats}});
dec_hello_extensions(<<?UINT16(?SNI_EXT), ?UINT16(Len), Rest/binary>>, Acc) when Len == 0 ->
- dec_hello_extensions(Rest, Acc#hello_extensions{sni = ""}); %% Server may send an empy SNI
+ dec_hello_extensions(Rest, Acc#hello_extensions{sni = #sni{hostname = ""}}); %% Server may send an empy SNI
dec_hello_extensions(<<?UINT16(?SNI_EXT), ?UINT16(Len),
ExtData:Len/binary, Rest/binary>>, Acc) ->
@@ -1993,25 +2001,26 @@ handle_psk_identity(_PSKIdentity, LookupFun)
handle_psk_identity(PSKIdentity, {Fun, UserState}) ->
Fun(psk, PSKIdentity, UserState).
-filter_hashsigns([], [], _, Acc) ->
- lists:reverse(Acc);
-filter_hashsigns([Suite | Suites], [#{key_exchange := KeyExchange} | Algos], HashSigns,
- Acc) when KeyExchange == dhe_ecdsa;
- KeyExchange == ecdhe_ecdsa ->
- do_filter_hashsigns(ecdsa, Suite, Suites, Algos, HashSigns, Acc);
-filter_hashsigns([Suite | Suites], [#{key_exchange := KeyExchange} | Algos], HashSigns,
+filter_hashsigns([], [], _, _, Acc) ->
+ lists:reverse(Acc);
+filter_hashsigns([Suite | Suites], [#{key_exchange := KeyExchange} | Algos], HashSigns, Version,
+ Acc) when KeyExchange == dhe_ecdsa;
+ KeyExchange == ecdhe_ecdsa ->
+ do_filter_hashsigns(ecdsa, Suite, Suites, Algos, HashSigns, Version, Acc);
+filter_hashsigns([Suite | Suites], [#{key_exchange := KeyExchange} | Algos], HashSigns, Version,
Acc) when KeyExchange == rsa;
KeyExchange == dhe_rsa;
KeyExchange == ecdhe_rsa;
KeyExchange == srp_rsa;
KeyExchange == rsa_psk ->
- do_filter_hashsigns(rsa, Suite, Suites, Algos, HashSigns, Acc);
-filter_hashsigns([Suite | Suites], [#{key_exchange := KeyExchange} | Algos], HashSigns, Acc) when
+ do_filter_hashsigns(rsa, Suite, Suites, Algos, HashSigns, Version, Acc);
+filter_hashsigns([Suite | Suites], [#{key_exchange := KeyExchange} | Algos], HashSigns, Version, Acc) when
KeyExchange == dhe_dss;
KeyExchange == srp_dss ->
- do_filter_hashsigns(dsa, Suite, Suites, Algos, HashSigns, Acc);
-filter_hashsigns([Suite | Suites], [#{key_exchange := KeyExchange} | Algos], HashSigns, Acc) when
+ do_filter_hashsigns(dsa, Suite, Suites, Algos, HashSigns, Version, Acc);
+filter_hashsigns([Suite | Suites], [#{key_exchange := KeyExchange} | Algos], HashSigns, Verion,
+ Acc) when
KeyExchange == dh_dss;
KeyExchange == dh_rsa;
KeyExchange == dh_ecdsa;
@@ -2020,28 +2029,37 @@ filter_hashsigns([Suite | Suites], [#{key_exchange := KeyExchange} | Algos], Has
%% Fixed DH certificates MAY be signed with any hash/signature
%% algorithm pair appearing in the hash_sign extension. The names
%% DH_DSS, DH_RSA, ECDH_ECDSA, and ECDH_RSA are historical.
- filter_hashsigns(Suites, Algos, HashSigns, [Suite| Acc]);
-filter_hashsigns([Suite | Suites], [#{key_exchange := KeyExchange} | Algos], HashSigns, Acc) when
+ filter_hashsigns(Suites, Algos, HashSigns, Verion, [Suite| Acc]);
+filter_hashsigns([Suite | Suites], [#{key_exchange := KeyExchange} | Algos], HashSigns, Version,
+ Acc) when
KeyExchange == dh_anon;
KeyExchange == ecdh_anon;
KeyExchange == srp_anon;
KeyExchange == psk;
KeyExchange == dhe_psk ->
%% In this case hashsigns is not used as the kexchange is anonaymous
- filter_hashsigns(Suites, Algos, HashSigns, [Suite| Acc]).
+ filter_hashsigns(Suites, Algos, HashSigns, Version, [Suite| Acc]).
-do_filter_hashsigns(SignAlgo, Suite, Suites, Algos, HashSigns, Acc) ->
+do_filter_hashsigns(SignAlgo, Suite, Suites, Algos, HashSigns, Version, Acc) ->
case lists:keymember(SignAlgo, 2, HashSigns) of
true ->
- filter_hashsigns(Suites, Algos, HashSigns, [Suite| Acc]);
+ filter_hashsigns(Suites, Algos, HashSigns, Version, [Suite| Acc]);
false ->
- filter_hashsigns(Suites, Algos, HashSigns, Acc)
+ filter_hashsigns(Suites, Algos, HashSigns, Version, Acc)
end.
-unavailable_ecc_suites(no_curve) ->
- ssl_cipher:ec_keyed_suites();
-unavailable_ecc_suites(_) ->
- [].
+filter_unavailable_ecc_suites(no_curve, Suites) ->
+ ECCSuites = ssl_cipher:filter_suites(Suites, #{key_exchange_filters => [fun(ecdh_ecdsa) -> true;
+ (ecdhe_ecdsa) -> true;
+ (ecdh_rsa) -> true;
+ (_) -> false
+ end],
+ cipher_filters => [],
+ mac_filters => [],
+ prf_filters => []}),
+ Suites -- ECCSuites;
+filter_unavailable_ecc_suites(_, Suites) ->
+ Suites.
%%-------------Extension handling --------------------------------
handle_renegotiation_extension(Role, RecordCB, Version, Info, Random, NegotiatedCipherSuite,
@@ -2134,35 +2152,7 @@ sign_algo(Alg) ->
{_, Sign} =public_key:pkix_sign_types(Alg),
Sign.
-is_acceptable_hash_sign(Algos, _, _, KeyExAlgo, SupportedHashSigns) when
- KeyExAlgo == dh_dss;
- KeyExAlgo == dh_rsa;
- KeyExAlgo == dh_ecdsa ->
- %% dh_* could be called only dh in TLS-1.2
- is_acceptable_hash_sign(Algos, SupportedHashSigns);
-is_acceptable_hash_sign(Algos, rsa, ecdsa, ecdh_rsa, SupportedHashSigns) ->
- is_acceptable_hash_sign(Algos, SupportedHashSigns);
-is_acceptable_hash_sign({_, rsa} = Algos, rsa, _, dhe_rsa, SupportedHashSigns) ->
- is_acceptable_hash_sign(Algos, SupportedHashSigns);
-is_acceptable_hash_sign({_, rsa} = Algos, rsa, rsa, ecdhe_rsa, SupportedHashSigns) ->
- is_acceptable_hash_sign(Algos, SupportedHashSigns);
-is_acceptable_hash_sign({_, rsa} = Algos, rsa, rsa, rsa, SupportedHashSigns) ->
- is_acceptable_hash_sign(Algos, SupportedHashSigns);
-is_acceptable_hash_sign({_, rsa} = Algos, rsa, _, srp_rsa, SupportedHashSigns) ->
- is_acceptable_hash_sign(Algos, SupportedHashSigns);
-is_acceptable_hash_sign({_, rsa} = Algos, rsa, _, rsa_psk, SupportedHashSigns) ->
- is_acceptable_hash_sign(Algos, SupportedHashSigns);
-is_acceptable_hash_sign({_, dsa} = Algos, dsa, _, dhe_dss, SupportedHashSigns) ->
- is_acceptable_hash_sign(Algos, SupportedHashSigns);
-is_acceptable_hash_sign({_, dsa} = Algos, dsa, _, srp_dss, SupportedHashSigns) ->
- is_acceptable_hash_sign(Algos, SupportedHashSigns);
-is_acceptable_hash_sign({_, ecdsa} = Algos, ecdsa, _, dhe_ecdsa, SupportedHashSigns) ->
- is_acceptable_hash_sign(Algos, SupportedHashSigns);
-is_acceptable_hash_sign({_, ecdsa} = Algos, ecdsa, ecdsa, ecdh_ecdsa, SupportedHashSigns) ->
- is_acceptable_hash_sign(Algos, SupportedHashSigns);
-is_acceptable_hash_sign({_, ecdsa} = Algos, ecdsa, ecdsa, ecdhe_ecdsa, SupportedHashSigns) ->
- is_acceptable_hash_sign(Algos, SupportedHashSigns);
-is_acceptable_hash_sign(_, _, _, KeyExAlgo, _) when
+is_acceptable_hash_sign( _, KeyExAlgo, _) when
KeyExAlgo == psk;
KeyExAlgo == dhe_psk;
KeyExAlgo == srp_anon;
@@ -2170,8 +2160,9 @@ is_acceptable_hash_sign(_, _, _, KeyExAlgo, _) when
KeyExAlgo == ecdhe_anon
->
true;
-is_acceptable_hash_sign(_,_, _,_,_) ->
- false.
+is_acceptable_hash_sign(Algos,_, SupportedHashSigns) ->
+ is_acceptable_hash_sign(Algos, SupportedHashSigns).
+
is_acceptable_hash_sign(Algos, SupportedHashSigns) ->
lists:member(Algos, SupportedHashSigns).
@@ -2350,3 +2341,21 @@ handle_renegotiation_info(_RecordCB, ConnectionStates, SecureRenegotation) ->
{false, false} ->
{ok, ConnectionStates}
end.
+
+cert_curve(_, _, no_suite) ->
+ {no_curve, no_suite};
+cert_curve(Cert, ECCCurve0, CipherSuite) ->
+ case ssl_cipher:suite_definition(CipherSuite) of
+ #{key_exchange := Kex} when Kex == ecdh_ecdsa;
+ Kex == ecdh_rsa ->
+ OtpCert = public_key:pkix_decode_cert(Cert, otp),
+ TBSCert = OtpCert#'OTPCertificate'.tbsCertificate,
+ #'OTPSubjectPublicKeyInfo'{algorithm = AlgInfo}
+ = TBSCert#'OTPTBSCertificate'.subjectPublicKeyInfo,
+ {namedCurve, Oid} = AlgInfo#'PublicKeyAlgorithm'.parameters,
+ {{namedCurve, Oid}, CipherSuite};
+ _ ->
+ {ECCCurve0, CipherSuite}
+ end.
+
+
diff --git a/lib/ssl/src/tls_connection.erl b/lib/ssl/src/tls_connection.erl
index 914ee9f22f..d3b3902fea 100644
--- a/lib/ssl/src/tls_connection.erl
+++ b/lib/ssl/src/tls_connection.erl
@@ -676,6 +676,7 @@ handle_info({CloseTag, Socket}, StateName,
#state{socket = Socket, close_tag = CloseTag,
socket_options = #socket_options{active = Active},
protocol_buffers = #protocol_buffers{tls_cipher_texts = CTs},
+ user_data_buffer = Buffer,
negotiated_version = Version} = State) ->
%% Note that as of TLS 1.1,
@@ -683,7 +684,7 @@ handle_info({CloseTag, Socket}, StateName,
%% session not be resumed. This is a change from TLS 1.0 to conform
%% with widespread implementation practice.
- case (Active == false) andalso (CTs =/= []) of
+ case (Active == false) andalso ((CTs =/= []) or (Buffer =/= <<>>)) of
false ->
case Version of
{1, N} when N >= 1 ->