From e7f8debed1ecd2b506b28d7aa068d409948130d2 Mon Sep 17 00:00:00 2001 From: Ingela Anderton Andin Date: Thu, 7 Mar 2013 20:05:19 +0100 Subject: ssl: Structural perarparation to support DTLS Also phase in tls module as main API instead of ssl. To make API clearer. As TLS is the new protocol name. Maybe keep some API functions in ssl --- lib/ssl/src/ssl_handshake.erl | 1827 ----------------------------------------- 1 file changed, 1827 deletions(-) delete mode 100644 lib/ssl/src/ssl_handshake.erl (limited to 'lib/ssl/src/ssl_handshake.erl') diff --git a/lib/ssl/src/ssl_handshake.erl b/lib/ssl/src/ssl_handshake.erl deleted file mode 100644 index 77c634616e..0000000000 --- a/lib/ssl/src/ssl_handshake.erl +++ /dev/null @@ -1,1827 +0,0 @@ -%% -%% %CopyrightBegin% -%% -%% Copyright Ericsson AB 2007-2013. All Rights Reserved. -%% -%% The contents of this file are subject to the Erlang Public License, -%% Version 1.1, (the "License"); you may not use this file except in -%% compliance with the License. You should have received a copy of the -%% Erlang Public License along with this software. If not, it can be -%% retrieved online at http://www.erlang.org/. -%% -%% Software distributed under the License is distributed on an "AS IS" -%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See -%% the License for the specific language governing rights and limitations -%% under the License. -%% -%% %CopyrightEnd% -%% - -%%---------------------------------------------------------------------- -%% Purpose: Help funtions for handling the SSL-handshake protocol -%%---------------------------------------------------------------------- - --module(ssl_handshake). - --include("ssl_handshake.hrl"). --include("ssl_record.hrl"). --include("ssl_cipher.hrl"). --include("ssl_alert.hrl"). --include("ssl_internal.hrl"). --include("ssl_srp.hrl"). --include_lib("public_key/include/public_key.hrl"). - --export([master_secret/4, client_hello/8, server_hello/7, hello/4, - hello_request/0, certify/7, certificate/4, - client_certificate_verify/6, certificate_verify/6, verify_signature/5, - certificate_request/3, key_exchange/3, server_key_exchange_hash/2, - finished/5, verify_connection/6, get_tls_handshake/3, - decode_client_key/3, decode_server_key/3, server_hello_done/0, - encode_handshake/2, init_handshake_history/0, update_handshake_history/2, - decrypt_premaster_secret/2, prf/5, next_protocol/1]). - --export([dec_hello_extensions/2]). - --type tls_handshake() :: #client_hello{} | #server_hello{} | - #server_hello_done{} | #certificate{} | #certificate_request{} | - #client_key_exchange{} | #finished{} | #certificate_verify{} | - #hello_request{} | #next_protocol{}. - --define(NAMED_CURVE_TYPE, 3). - -%%==================================================================== -%% Internal application API -%%==================================================================== -%%-------------------------------------------------------------------- --spec client_hello(host(), inet:port_number(), #connection_states{}, - #ssl_options{}, integer(), atom(), boolean(), der_cert()) -> - #client_hello{}. -%% -%% Description: Creates a client hello message. -%%-------------------------------------------------------------------- -client_hello(Host, Port, ConnectionStates, - #ssl_options{versions = Versions, - ciphers = UserSuites - } = SslOpts, - Cache, CacheCb, Renegotiation, OwnCert) -> - Version = ssl_record:highest_protocol_version(Versions), - Pending = ssl_record:pending_connection_state(ConnectionStates, read), - SecParams = Pending#connection_state.security_parameters, - Ciphers = available_suites(UserSuites, Version), - SRP = srp_user(SslOpts), - {EcPointFormats, EllipticCurves} = default_ecc_extensions(Version), - - Id = ssl_session:client_id({Host, Port, SslOpts}, Cache, CacheCb, OwnCert), - - #client_hello{session_id = Id, - client_version = Version, - cipher_suites = cipher_suites(Ciphers, Renegotiation), - compression_methods = ssl_record:compressions(), - random = SecParams#security_parameters.client_random, - - renegotiation_info = - renegotiation_info(client, ConnectionStates, Renegotiation), - srp = SRP, - hash_signs = default_hash_signs(), - ec_point_formats = EcPointFormats, - elliptic_curves = EllipticCurves, - next_protocol_negotiation = - encode_client_protocol_negotiation(SslOpts#ssl_options.next_protocol_selector, Renegotiation) - }. - -encode_protocol(Protocol, Acc) -> - Len = byte_size(Protocol), - <>. - -encode_protocols_advertised_on_server(undefined) -> - undefined; - -encode_protocols_advertised_on_server(Protocols) -> - #next_protocol_negotiation{extension_data = lists:foldl(fun encode_protocol/2, <<>>, Protocols)}. - -%%-------------------------------------------------------------------- --spec server_hello(session_id(), tls_version(), #connection_states{}, - boolean(), [binary()] | undefined, - #ec_point_formats{} | undefined, - #elliptic_curves{} | undefined) -> #server_hello{}. -%% -%% Description: Creates a server hello message. -%%-------------------------------------------------------------------- -server_hello(SessionId, Version, ConnectionStates, Renegotiation, - ProtocolsAdvertisedOnServer, EcPointFormats, EllipticCurves) -> - Pending = ssl_record:pending_connection_state(ConnectionStates, read), - SecParams = Pending#connection_state.security_parameters, - #server_hello{server_version = Version, - cipher_suite = SecParams#security_parameters.cipher_suite, - compression_method = - SecParams#security_parameters.compression_algorithm, - random = SecParams#security_parameters.server_random, - session_id = SessionId, - renegotiation_info = - renegotiation_info(server, ConnectionStates, Renegotiation), - ec_point_formats = EcPointFormats, - elliptic_curves = EllipticCurves, - next_protocol_negotiation = encode_protocols_advertised_on_server(ProtocolsAdvertisedOnServer) - }. - -%%-------------------------------------------------------------------- --spec hello_request() -> #hello_request{}. -%% -%% Description: Creates a hello request message sent by server to -%% trigger renegotiation. -%%-------------------------------------------------------------------- -hello_request() -> - #hello_request{}. - -%%-------------------------------------------------------------------- --spec hello(#server_hello{} | #client_hello{}, #ssl_options{}, - #connection_states{} | {inet:port_number(), #session{}, db_handle(), - atom(), #connection_states{}, binary()}, - boolean()) -> - {tls_version(), session_id(), #connection_states{}, binary() | undefined}| - {tls_version(), {resumed | new, #session{}}, #connection_states{}, [binary()] | undefined, - [oid()] | undefined, [oid()] | undefined} | - #alert{}. -%% -%% Description: Handles a recieved hello message -%%-------------------------------------------------------------------- -hello(#server_hello{cipher_suite = CipherSuite, server_version = Version, - compression_method = Compression, random = Random, - session_id = SessionId, renegotiation_info = Info, - hash_signs = _HashSigns} = Hello, - #ssl_options{secure_renegotiate = SecureRenegotation, next_protocol_selector = NextProtocolSelector, - versions = SupportedVersions}, - ConnectionStates0, Renegotiation) -> - %%TODO: select hash and signature algorigthm - case ssl_record:is_acceptable_version(Version, SupportedVersions) of - true -> - case handle_renegotiation_info(client, Info, ConnectionStates0, - Renegotiation, SecureRenegotation, []) of - {ok, ConnectionStates1} -> - ConnectionStates = - hello_pending_connection_states(client, Version, CipherSuite, Random, - Compression, ConnectionStates1), - case handle_next_protocol(Hello, NextProtocolSelector, Renegotiation) of - #alert{} = Alert -> - Alert; - Protocol -> - {Version, SessionId, ConnectionStates, Protocol} - end; - #alert{} = Alert -> - Alert - end; - false -> - ?ALERT_REC(?FATAL, ?PROTOCOL_VERSION) - end; - -hello(#client_hello{client_version = ClientVersion} = Hello, - #ssl_options{versions = Versions} = SslOpts, - {Port, Session0, Cache, CacheCb, ConnectionStates0, Cert}, Renegotiation) -> - %% TODO: select hash and signature algorithm - Version = select_version(ClientVersion, Versions), - case ssl_record:is_acceptable_version(Version, Versions) of - true -> - %% TODO: need to take supported Curves into Account when selecting the CipherSuite.... - %% if whe have an ECDSA cert with an unsupported curve, we need to drop ECDSA ciphers - {Type, #session{cipher_suite = CipherSuite} = Session1} - = select_session(Hello, Port, Session0, Version, - SslOpts, Cache, CacheCb, Cert), - case CipherSuite of - no_suite -> - ?ALERT_REC(?FATAL, ?INSUFFICIENT_SECURITY); - _ -> - try handle_hello_extensions(Hello, Version, SslOpts, Session1, ConnectionStates0, Renegotiation) of - {Session, ConnectionStates, ProtocolsToAdvertise, ECPointFormats, EllipticCurves} -> - {Version, {Type, Session}, ConnectionStates, - ProtocolsToAdvertise, ECPointFormats, EllipticCurves} - catch throw:Alert -> - Alert - end - end; - false -> - ?ALERT_REC(?FATAL, ?PROTOCOL_VERSION) - end. - -%%-------------------------------------------------------------------- --spec certify(#certificate{}, db_handle(), certdb_ref(), integer() | nolimit, - verify_peer | verify_none, {fun(), term}, - client | server) -> {der_cert(), public_key_info()} | #alert{}. -%% -%% Description: Handles a certificate handshake message -%%-------------------------------------------------------------------- -certify(#certificate{asn1_certificates = ASN1Certs}, CertDbHandle, CertDbRef, - MaxPathLen, _Verify, VerifyFunAndState, Role) -> - [PeerCert | _] = ASN1Certs, - - ValidationFunAndState = - case VerifyFunAndState of - undefined -> - {fun(OtpCert, ExtensionOrVerifyResult, SslState) -> - ssl_certificate:validate_extension(OtpCert, - ExtensionOrVerifyResult, SslState) - end, Role}; - {Fun, UserState0} -> - {fun(OtpCert, {extension, _} = Extension, {SslState, UserState}) -> - case ssl_certificate:validate_extension(OtpCert, - Extension, - SslState) of - {valid, NewSslState} -> - {valid, {NewSslState, UserState}}; - {fail, Reason} -> - apply_user_fun(Fun, OtpCert, Reason, UserState, - SslState); - {unknown, _} -> - apply_user_fun(Fun, OtpCert, - Extension, UserState, SslState) - end; - (OtpCert, VerifyResult, {SslState, UserState}) -> - apply_user_fun(Fun, OtpCert, VerifyResult, UserState, - SslState) - end, {Role, UserState0}} - end, - - try - {TrustedErlCert, CertPath} = - ssl_certificate:trusted_cert_and_path(ASN1Certs, CertDbHandle, CertDbRef), - case public_key:pkix_path_validation(TrustedErlCert, - CertPath, - [{max_path_length, - MaxPathLen}, - {verify_fun, ValidationFunAndState}]) of - {ok, {PublicKeyInfo,_}} -> - {PeerCert, PublicKeyInfo}; - {error, Reason} -> - path_validation_alert(Reason) - end - catch - error:_ -> - %% ASN-1 decode of certificate somehow failed - ?ALERT_REC(?FATAL, ?CERTIFICATE_UNKNOWN) - end. - -%%-------------------------------------------------------------------- --spec certificate(der_cert(), db_handle(), certdb_ref(), client | server) -> #certificate{} | #alert{}. -%% -%% Description: Creates a certificate message. -%%-------------------------------------------------------------------- -certificate(OwnCert, CertDbHandle, CertDbRef, client) -> - Chain = - case ssl_certificate:certificate_chain(OwnCert, CertDbHandle, CertDbRef) of - {ok, CertChain} -> - CertChain; - {error, _} -> - %% If no suitable certificate is available, the client - %% SHOULD send a certificate message containing no - %% certificates. (chapter 7.4.6. RFC 4346) - [] - end, - #certificate{asn1_certificates = Chain}; - -certificate(OwnCert, CertDbHandle, CertDbRef, server) -> - case ssl_certificate:certificate_chain(OwnCert, CertDbHandle, CertDbRef) of - {ok, Chain} -> - #certificate{asn1_certificates = Chain}; - {error, _} -> - ?ALERT_REC(?FATAL, ?INTERNAL_ERROR) - end. - -%%-------------------------------------------------------------------- --spec client_certificate_verify(undefined | der_cert(), binary(), - tls_version(), term(), private_key(), - tls_handshake_history()) -> - #certificate_verify{} | ignore | #alert{}. -%% -%% Description: Creates a certificate_verify message, called by the client. -%%-------------------------------------------------------------------- -client_certificate_verify(undefined, _, _, _, _, _) -> - ignore; -client_certificate_verify(_, _, _, _, undefined, _) -> - ignore; -client_certificate_verify(OwnCert, MasterSecret, Version, - {HashAlgo, SignAlgo}, - PrivateKey, {Handshake, _}) -> - case public_key:pkix_is_fixed_dh_cert(OwnCert) of - true -> - ?ALERT_REC(?FATAL, ?UNSUPPORTED_CERTIFICATE); - false -> - Hashes = - calc_certificate_verify(Version, HashAlgo, MasterSecret, Handshake), - Signed = digitally_signed(Version, Hashes, HashAlgo, PrivateKey), - #certificate_verify{signature = Signed, hashsign_algorithm = {HashAlgo, SignAlgo}} - end. - -%%-------------------------------------------------------------------- --spec certificate_verify(binary(), public_key_info(), tls_version(), term(), - binary(), tls_handshake_history()) -> valid | #alert{}. -%% -%% Description: Checks that the certificate_verify message is valid. -%%-------------------------------------------------------------------- -certificate_verify(Signature, PublicKeyInfo, Version, - HashSign = {HashAlgo, _}, MasterSecret, {_, Handshake}) -> - Hash = calc_certificate_verify(Version, HashAlgo, MasterSecret, Handshake), - case verify_signature(Version, Hash, HashSign, Signature, PublicKeyInfo) of - true -> - valid; - _ -> - ?ALERT_REC(?FATAL, ?BAD_CERTIFICATE) - end. - -%%-------------------------------------------------------------------- --spec verify_signature(tls_version(), binary(), {term(), term()}, binary(), - public_key_info()) -> true | false. -%% -%% Description: Checks that a public_key signature is valid. -%%-------------------------------------------------------------------- -verify_signature(_Version, _Hash, {_HashAlgo, anon}, _Signature, _) -> - true; -verify_signature({3, Minor}, Hash, {HashAlgo, rsa}, Signature, {?rsaEncryption, PubKey, _PubKeyParams}) - when Minor >= 3 -> - public_key:verify({digest, Hash}, HashAlgo, Signature, PubKey); -verify_signature(_Version, Hash, _HashAlgo, Signature, {?rsaEncryption, PubKey, _PubKeyParams}) -> - case public_key:decrypt_public(Signature, PubKey, - [{rsa_pad, rsa_pkcs1_padding}]) of - Hash -> true; - _ -> false - end; -verify_signature(_Version, Hash, {HashAlgo, dsa}, Signature, {?'id-dsa', PublicKey, PublicKeyParams}) -> - public_key:verify({digest, Hash}, HashAlgo, Signature, {PublicKey, PublicKeyParams}); -verify_signature(_Version, Hash, {HashAlgo, ecdsa}, Signature, {?'id-ecPublicKey', PublicKey, PublicKeyParams}) -> - public_key:verify({digest, Hash}, HashAlgo, Signature, {PublicKey, PublicKeyParams}). - -%%-------------------------------------------------------------------- --spec certificate_request(#connection_states{}, db_handle(), certdb_ref()) -> - #certificate_request{}. -%% -%% Description: Creates a certificate_request message, called by the server. -%%-------------------------------------------------------------------- -certificate_request(ConnectionStates, CertDbHandle, CertDbRef) -> - #connection_state{security_parameters = - #security_parameters{cipher_suite = CipherSuite}} = - ssl_record:pending_connection_state(ConnectionStates, read), - Types = certificate_types(CipherSuite), - HashSigns = default_hash_signs(), - Authorities = certificate_authorities(CertDbHandle, CertDbRef), - #certificate_request{ - certificate_types = Types, - hashsign_algorithms = HashSigns, - certificate_authorities = Authorities - }. - -%%-------------------------------------------------------------------- --spec key_exchange(client | server, tls_version(), - {premaster_secret, binary(), public_key_info()} | - {dh, binary()} | - {dh, {binary(), binary()}, #'DHParameter'{}, {HashAlgo::atom(), SignAlgo::atom()}, - binary(), binary(), private_key()} | - {ecdh, #'ECPrivateKey'{}} | - {psk, binary()} | - {dhe_psk, binary(), binary()} | - {srp, {binary(), binary()}, #srp_user{}, {HashAlgo::atom(), SignAlgo::atom()}, - binary(), binary(), private_key()}) -> - #client_key_exchange{} | #server_key_exchange{}. -%% -%% Description: Creates a keyexchange message. -%%-------------------------------------------------------------------- -key_exchange(client, _Version, {premaster_secret, Secret, {_, PublicKey, _}}) -> - EncPremasterSecret = - encrypted_premaster_secret(Secret, PublicKey), - #client_key_exchange{exchange_keys = EncPremasterSecret}; - -key_exchange(client, _Version, {dh, PublicKey}) -> - #client_key_exchange{ - exchange_keys = #client_diffie_hellman_public{ - dh_public = PublicKey} - }; - -key_exchange(client, _Version, {ecdh, #'ECPrivateKey'{publicKey = {0, ECPublicKey}}}) -> - #client_key_exchange{ - exchange_keys = #client_ec_diffie_hellman_public{ - dh_public = ECPublicKey} - }; - -key_exchange(client, _Version, {psk, Identity}) -> - #client_key_exchange{ - exchange_keys = #client_psk_identity{ - identity = Identity} - }; - -key_exchange(client, _Version, {dhe_psk, Identity, PublicKey}) -> - #client_key_exchange{ - exchange_keys = #client_dhe_psk_identity{ - identity = Identity, - dh_public = PublicKey} - }; - -key_exchange(client, _Version, {psk_premaster_secret, PskIdentity, Secret, {_, PublicKey, _}}) -> - EncPremasterSecret = - encrypted_premaster_secret(Secret, PublicKey), - #client_key_exchange{ - exchange_keys = #client_rsa_psk_identity{ - identity = PskIdentity, - exchange_keys = EncPremasterSecret}}; - -key_exchange(client, _Version, {srp, PublicKey}) -> - #client_key_exchange{ - exchange_keys = #client_srp_public{ - srp_a = PublicKey} - }; - -key_exchange(server, Version, {dh, {PublicKey, _}, - #'DHParameter'{prime = P, base = G}, - HashSign, ClientRandom, ServerRandom, PrivateKey}) -> - ServerDHParams = #server_dh_params{dh_p = int_to_bin(P), - dh_g = int_to_bin(G), dh_y = PublicKey}, - enc_server_key_exchange(Version, ServerDHParams, HashSign, - ClientRandom, ServerRandom, PrivateKey); - -key_exchange(server, Version, {ecdh, #'ECPrivateKey'{publicKey = {0, ECPublicKey}, - parameters = ECCurve}, HashSign, ClientRandom, ServerRandom, - PrivateKey}) -> - ServerECParams = #server_ecdh_params{curve = ECCurve, public = ECPublicKey}, - enc_server_key_exchange(Version, ServerECParams, HashSign, - ClientRandom, ServerRandom, PrivateKey); - -key_exchange(server, Version, {psk, PskIdentityHint, - HashSign, ClientRandom, ServerRandom, PrivateKey}) -> - ServerPSKParams = #server_psk_params{hint = PskIdentityHint}, - enc_server_key_exchange(Version, ServerPSKParams, HashSign, - ClientRandom, ServerRandom, PrivateKey); - -key_exchange(server, Version, {dhe_psk, PskIdentityHint, {PublicKey, _}, - #'DHParameter'{prime = P, base = G}, - HashSign, ClientRandom, ServerRandom, PrivateKey}) -> - ServerEDHPSKParams = #server_dhe_psk_params{ - hint = PskIdentityHint, - dh_params = #server_dh_params{dh_p = int_to_bin(P), - dh_g = int_to_bin(G), dh_y = PublicKey} - }, - enc_server_key_exchange(Version, ServerEDHPSKParams, - HashSign, ClientRandom, ServerRandom, PrivateKey); - -key_exchange(server, Version, {srp, {PublicKey, _}, - #srp_user{generator = Generator, prime = Prime, - salt = Salt}, - HashSign, ClientRandom, ServerRandom, PrivateKey}) -> - ServerSRPParams = #server_srp_params{srp_n = Prime, srp_g = Generator, - srp_s = Salt, srp_b = PublicKey}, - enc_server_key_exchange(Version, ServerSRPParams, HashSign, - ClientRandom, ServerRandom, PrivateKey). - -enc_server_key_exchange(Version, Params, {HashAlgo, SignAlgo}, - ClientRandom, ServerRandom, PrivateKey) -> - EncParams = enc_server_key(Params), - case HashAlgo of - null -> - #server_key_params{params = Params, - params_bin = EncParams, - hashsign = {null, anon}, - signature = <<>>}; - _ -> - Hash = - server_key_exchange_hash(HashAlgo, <>), - Signature = digitally_signed(Version, Hash, HashAlgo, PrivateKey), - #server_key_params{params = Params, - params_bin = EncParams, - hashsign = {HashAlgo, SignAlgo}, - signature = Signature} - end. - -%%-------------------------------------------------------------------- --spec master_secret(tls_version(), #session{} | binary(), #connection_states{}, - client | server) -> {binary(), #connection_states{}} | #alert{}. -%% -%% Description: Sets or calculates the master secret and calculate keys, -%% updating the pending connection states. The Mastersecret and the update -%% connection states are returned or an alert if the calculation fails. -%%------------------------------------------------------------------- -master_secret(Version, #session{master_secret = Mastersecret}, - ConnectionStates, Role) -> - ConnectionState = - ssl_record:pending_connection_state(ConnectionStates, read), - SecParams = ConnectionState#connection_state.security_parameters, - try master_secret(Version, Mastersecret, SecParams, - ConnectionStates, Role) - catch - exit:Reason -> - Report = io_lib:format("Key calculation failed due to ~p", - [Reason]), - error_logger:error_report(Report), - ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE) - end; - -master_secret(Version, PremasterSecret, ConnectionStates, Role) -> - ConnectionState = - ssl_record:pending_connection_state(ConnectionStates, read), - SecParams = ConnectionState#connection_state.security_parameters, - #security_parameters{prf_algorithm = PrfAlgo, - client_random = ClientRandom, - server_random = ServerRandom} = SecParams, - try master_secret(Version, - calc_master_secret(Version,PrfAlgo,PremasterSecret, - ClientRandom, ServerRandom), - SecParams, ConnectionStates, Role) - catch - exit:Reason -> - Report = io_lib:format("Master secret calculation failed" - " due to ~p", [Reason]), - error_logger:error_report(Report), - ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE) - end. - --spec next_protocol(binary()) -> #next_protocol{}. - -next_protocol(SelectedProtocol) -> - #next_protocol{selected_protocol = SelectedProtocol}. - -%%-------------------------------------------------------------------- --spec finished(tls_version(), client | server, integer(), binary(), tls_handshake_history()) -> - #finished{}. -%% -%% Description: Creates a handshake finished message -%%------------------------------------------------------------------- -finished(Version, Role, PrfAlgo, MasterSecret, {Handshake, _}) -> % use the current handshake - #finished{verify_data = - calc_finished(Version, Role, PrfAlgo, MasterSecret, Handshake)}. - -%%-------------------------------------------------------------------- --spec verify_connection(tls_version(), #finished{}, client | server, integer(), binary(), - tls_handshake_history()) -> verified | #alert{}. -%% -%% Description: Checks the ssl handshake finished message to verify -%% the connection. -%%------------------------------------------------------------------- -verify_connection(Version, #finished{verify_data = Data}, - Role, PrfAlgo, MasterSecret, {_, Handshake}) -> - %% use the previous hashes - case calc_finished(Version, Role, PrfAlgo, MasterSecret, Handshake) of - Data -> - verified; - _ -> - ?ALERT_REC(?FATAL, ?DECRYPT_ERROR) - end. -%%-------------------------------------------------------------------- --spec server_hello_done() -> #server_hello_done{}. -%% -%% Description: Creates a server hello done message. -%%-------------------------------------------------------------------- -server_hello_done() -> - #server_hello_done{}. - -%%-------------------------------------------------------------------- --spec encode_handshake(tls_handshake(), tls_version()) -> iolist(). -%% -%% Description: Encode a handshake packet to binary -%%--------------------------------------------------------------------x -encode_handshake(Package, Version) -> - {MsgType, Bin} = enc_hs(Package, Version), - Len = byte_size(Bin), - [MsgType, ?uint24(Len), Bin]. - -%%-------------------------------------------------------------------- --spec get_tls_handshake(tls_version(), binary(), binary() | iolist()) -> - {[tls_handshake()], binary()}. -%% -%% Description: Given buffered and new data from ssl_record, collects -%% and returns it as a list of handshake messages, also returns leftover -%% data. -%%-------------------------------------------------------------------- -get_tls_handshake(Version, Data, <<>>) -> - get_tls_handshake_aux(Version, Data, []); -get_tls_handshake(Version, Data, Buffer) -> - get_tls_handshake_aux(Version, list_to_binary([Buffer, Data]), []). - -%%-------------------------------------------------------------------- --spec decode_client_key(binary(), key_algo(), tls_version()) -> - #encrypted_premaster_secret{} - | #client_diffie_hellman_public{} - | #client_ec_diffie_hellman_public{} - | #client_psk_identity{} - | #client_dhe_psk_identity{} - | #client_rsa_psk_identity{} - | #client_srp_public{}. -%% -%% Description: Decode client_key data and return appropriate type -%%-------------------------------------------------------------------- -decode_client_key(ClientKey, Type, Version) -> - dec_client_key(ClientKey, key_exchange_alg(Type), Version). - -%%-------------------------------------------------------------------- --spec decode_server_key(binary(), key_algo(), tls_version()) -> - #server_key_params{}. -%% -%% Description: Decode server_key data and return appropriate type -%%-------------------------------------------------------------------- -decode_server_key(ServerKey, Type, Version) -> - dec_server_key(ServerKey, key_exchange_alg(Type), Version). - -%%-------------------------------------------------------------------- --spec init_handshake_history() -> tls_handshake_history(). - -%% -%% Description: Initialize the empty handshake history buffer. -%%-------------------------------------------------------------------- -init_handshake_history() -> - {[], []}. - -%%-------------------------------------------------------------------- --spec update_handshake_history(tls_handshake_history(), Data ::term()) -> - tls_handshake_history(). -%% -%% Description: Update the handshake history buffer with Data. -%%-------------------------------------------------------------------- -update_handshake_history(Handshake, % special-case SSL2 client hello - <>) -> - update_handshake_history(Handshake, - <>); -update_handshake_history({Handshake0, _Prev}, Data) -> - {[Data|Handshake0], Handshake0}. - -%%-------------------------------------------------------------------- --spec decrypt_premaster_secret(binary(), #'RSAPrivateKey'{}) -> binary(). - -%% -%% Description: Public key decryption using the private key. -%%-------------------------------------------------------------------- -decrypt_premaster_secret(Secret, RSAPrivateKey) -> - try public_key:decrypt_private(Secret, RSAPrivateKey, - [{rsa_pad, rsa_pkcs1_padding}]) - catch - _:_ -> - io:format("decrypt_premaster_secret error"), - throw(?ALERT_REC(?FATAL, ?DECRYPT_ERROR)) - end. - -%%-------------------------------------------------------------------- --spec server_key_exchange_hash(md5sha | md5 | sha | sha224 |sha256 | sha384 | sha512, binary()) -> binary(). -%% -%% Description: Calculate server key exchange hash -%%-------------------------------------------------------------------- -server_key_exchange_hash(md5sha, Value) -> - MD5 = crypto:hash(md5, Value), - SHA = crypto:hash(sha, Value), - <>; - -server_key_exchange_hash(Hash, Value) -> - crypto:hash(Hash, Value). - -%%-------------------------------------------------------------------- --spec prf(tls_version(), binary(), binary(), [binary()], non_neg_integer()) -> - {ok, binary()} | {error, undefined}. -%% -%% Description: use the TLS PRF to generate key material -%%-------------------------------------------------------------------- -prf({3,0}, _, _, _, _) -> - {error, undefined}; -prf({3,1}, Secret, Label, Seed, WantedLength) -> - {ok, ssl_tls1:prf(?MD5SHA, Secret, Label, Seed, WantedLength)}; -prf({3,_N}, Secret, Label, Seed, WantedLength) -> - {ok, ssl_tls1:prf(?SHA256, Secret, Label, Seed, WantedLength)}. - -%%-------------------------------------------------------------------- -%%% Internal functions -%%-------------------------------------------------------------------- -get_tls_handshake_aux(Version, <>, Acc) -> - Raw = <>, - H = dec_hs(Version, Type, Body), - get_tls_handshake_aux(Version, Rest, [{H,Raw} | Acc]); -get_tls_handshake_aux(_Version, Data, Acc) -> - {lists:reverse(Acc), Data}. - -path_validation_alert({bad_cert, cert_expired}) -> - ?ALERT_REC(?FATAL, ?CERTIFICATE_EXPIRED); -path_validation_alert({bad_cert, invalid_issuer}) -> - ?ALERT_REC(?FATAL, ?BAD_CERTIFICATE); -path_validation_alert({bad_cert, invalid_signature}) -> - ?ALERT_REC(?FATAL, ?BAD_CERTIFICATE); -path_validation_alert({bad_cert, name_not_permitted}) -> - ?ALERT_REC(?FATAL, ?BAD_CERTIFICATE); -path_validation_alert({bad_cert, unknown_critical_extension}) -> - ?ALERT_REC(?FATAL, ?UNSUPPORTED_CERTIFICATE); -path_validation_alert({bad_cert, cert_revoked}) -> - ?ALERT_REC(?FATAL, ?CERTIFICATE_REVOKED); -path_validation_alert({bad_cert, selfsigned_peer}) -> - ?ALERT_REC(?FATAL, ?BAD_CERTIFICATE); -path_validation_alert({bad_cert, unknown_ca}) -> - ?ALERT_REC(?FATAL, ?UNKNOWN_CA); -path_validation_alert(_) -> - ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE). - -select_session(Hello, Port, Session, Version, - #ssl_options{ciphers = UserSuites} = SslOpts, Cache, CacheCb, Cert) -> - SuggestedSessionId = Hello#client_hello.session_id, - {SessionId, Resumed} = ssl_session:server_id(Port, SuggestedSessionId, - SslOpts, Cert, - Cache, CacheCb), - Suites = available_suites(Cert, UserSuites, Version), - case Resumed of - undefined -> - CipherSuite = select_cipher_suite(Hello#client_hello.cipher_suites, Suites), - Compressions = Hello#client_hello.compression_methods, - Compression = select_compression(Compressions), - {new, Session#session{session_id = SessionId, - cipher_suite = CipherSuite, - compression_method = Compression}}; - _ -> - {resumed, Resumed} - end. - -available_suites(UserSuites, Version) -> - case UserSuites of - [] -> - ssl_cipher:suites(Version); - _ -> - UserSuites - end. - -available_suites(ServerCert, UserSuites, Version) -> - ssl_cipher:filter(ServerCert, available_suites(UserSuites, Version)). - -cipher_suites(Suites, false) -> - [?TLS_EMPTY_RENEGOTIATION_INFO_SCSV | Suites]; -cipher_suites(Suites, true) -> - Suites. - -srp_user(#ssl_options{srp_identity = {UserName, _}}) -> - #srp{username = UserName}; -srp_user(_) -> - undefined. - -renegotiation_info(client, _, false) -> - #renegotiation_info{renegotiated_connection = undefined}; -renegotiation_info(server, ConnectionStates, false) -> - CS = ssl_record:current_connection_state(ConnectionStates, read), - case CS#connection_state.secure_renegotiation of - true -> - #renegotiation_info{renegotiated_connection = ?byte(0)}; - false -> - #renegotiation_info{renegotiated_connection = undefined} - end; -renegotiation_info(client, ConnectionStates, true) -> - CS = ssl_record:current_connection_state(ConnectionStates, read), - case CS#connection_state.secure_renegotiation of - true -> - Data = CS#connection_state.client_verify_data, - #renegotiation_info{renegotiated_connection = Data}; - false -> - #renegotiation_info{renegotiated_connection = undefined} - end; - -renegotiation_info(server, ConnectionStates, true) -> - CS = ssl_record:current_connection_state(ConnectionStates, read), - case CS#connection_state.secure_renegotiation of - true -> - CData = CS#connection_state.client_verify_data, - SData =CS#connection_state.server_verify_data, - #renegotiation_info{renegotiated_connection = <>}; - false -> - #renegotiation_info{renegotiated_connection = undefined} - end. - -decode_next_protocols({next_protocol_negotiation, Protocols}) -> - decode_next_protocols(Protocols, []). -decode_next_protocols(<<>>, Acc) -> - lists:reverse(Acc); -decode_next_protocols(<>, Acc) -> - case Len of - 0 -> - {error, invalid_next_protocols}; - _ -> - decode_next_protocols(Rest, [Protocol|Acc]) - end; -decode_next_protocols(_Bytes, _Acc) -> - {error, invalid_next_protocols}. - -next_protocol_extension_allowed(NextProtocolSelector, Renegotiating) -> - NextProtocolSelector =/= undefined andalso not Renegotiating. - -handle_next_protocol_on_server(#client_hello{next_protocol_negotiation = undefined}, _Renegotiation, _SslOpts) -> - undefined; - -handle_next_protocol_on_server(#client_hello{next_protocol_negotiation = {next_protocol_negotiation, <<>>}}, - false, #ssl_options{next_protocols_advertised = Protocols}) -> - Protocols; - -handle_next_protocol_on_server(_Hello, _Renegotiation, _SSLOpts) -> - ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE). % unexpected next protocol extension - -handle_next_protocol(#server_hello{next_protocol_negotiation = undefined}, - _NextProtocolSelector, _Renegotiating) -> - undefined; - -handle_next_protocol(#server_hello{next_protocol_negotiation = Protocols}, - NextProtocolSelector, Renegotiating) -> - - case next_protocol_extension_allowed(NextProtocolSelector, Renegotiating) of - true -> - select_next_protocol(decode_next_protocols(Protocols), NextProtocolSelector); - false -> - ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE) % unexpected next protocol extension - end. - -select_next_protocol({error, _Reason}, _NextProtocolSelector) -> - ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE); -select_next_protocol(Protocols, NextProtocolSelector) -> - case NextProtocolSelector(Protocols) of - ?NO_PROTOCOL -> - ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE); - Protocol when is_binary(Protocol) -> - Protocol - end. - -default_ecc_extensions(Version) -> - CryptoSupport = proplists:get_value(public_keys, crypto:supports()), - case proplists:get_bool(ecdh, CryptoSupport) of - true -> - EcPointFormats = #ec_point_formats{ec_point_format_list = [?ECPOINT_UNCOMPRESSED]}, - EllipticCurves = #elliptic_curves{elliptic_curve_list = ssl_tls1:ecc_curves(Version)}, - {EcPointFormats, EllipticCurves}; - _ -> - {undefined, undefined} - end. - -handle_ecc_extensions(Version, EcPointFormats0, EllipticCurves0) -> - CryptoSupport = proplists:get_value(public_keys, crypto:supports()), - case proplists:get_bool(ecdh, CryptoSupport) of - true -> - EcPointFormats1 = handle_ecc_point_fmt_extension(EcPointFormats0), - EllipticCurves1 = handle_ecc_curves_extension(Version, EllipticCurves0), - {EcPointFormats1, EllipticCurves1}; - _ -> - {undefined, undefined} - end. - -handle_ecc_point_fmt_extension(undefined) -> - undefined; -handle_ecc_point_fmt_extension(_) -> - #ec_point_formats{ec_point_format_list = [?ECPOINT_UNCOMPRESSED]}. - -handle_ecc_curves_extension(Version, undefined) -> - undefined; -handle_ecc_curves_extension(Version, _) -> - #elliptic_curves{elliptic_curve_list = ssl_tls1:ecc_curves(Version)}. - -handle_renegotiation_info(_, #renegotiation_info{renegotiated_connection = ?byte(0)}, - ConnectionStates, false, _, _) -> - {ok, ssl_record:set_renegotiation_flag(true, ConnectionStates)}; - -handle_renegotiation_info(server, undefined, ConnectionStates, _, _, CipherSuites) -> - case is_member(?TLS_EMPTY_RENEGOTIATION_INFO_SCSV, CipherSuites) of - true -> - {ok, ssl_record:set_renegotiation_flag(true, ConnectionStates)}; - false -> - {ok, ssl_record:set_renegotiation_flag(false, ConnectionStates)} - end; - -handle_renegotiation_info(_, undefined, ConnectionStates, false, _, _) -> - {ok, ssl_record:set_renegotiation_flag(false, ConnectionStates)}; - -handle_renegotiation_info(client, #renegotiation_info{renegotiated_connection = ClientServerVerify}, - ConnectionStates, true, _, _) -> - CS = ssl_record:current_connection_state(ConnectionStates, read), - CData = CS#connection_state.client_verify_data, - SData = CS#connection_state.server_verify_data, - case <> == ClientServerVerify of - true -> - {ok, ConnectionStates}; - false -> - ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE) - end; -handle_renegotiation_info(server, #renegotiation_info{renegotiated_connection = ClientVerify}, - ConnectionStates, true, _, CipherSuites) -> - - case is_member(?TLS_EMPTY_RENEGOTIATION_INFO_SCSV, CipherSuites) of - true -> - ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE); - false -> - CS = ssl_record:current_connection_state(ConnectionStates, read), - Data = CS#connection_state.client_verify_data, - case Data == ClientVerify of - true -> - {ok, ConnectionStates}; - false -> - ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE) - end - end; - -handle_renegotiation_info(client, undefined, ConnectionStates, true, SecureRenegotation, _) -> - handle_renegotiation_info(ConnectionStates, SecureRenegotation); - -handle_renegotiation_info(server, undefined, ConnectionStates, true, SecureRenegotation, CipherSuites) -> - case is_member(?TLS_EMPTY_RENEGOTIATION_INFO_SCSV, CipherSuites) of - true -> - ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE); - false -> - handle_renegotiation_info(ConnectionStates, SecureRenegotation) - end. - -handle_renegotiation_info(ConnectionStates, SecureRenegotation) -> - CS = ssl_record:current_connection_state(ConnectionStates, read), - case {SecureRenegotation, CS#connection_state.secure_renegotiation} of - {_, true} -> - ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE); - {true, false} -> - ?ALERT_REC(?FATAL, ?NO_RENEGOTIATION); - {false, false} -> - {ok, ConnectionStates} - end. - -%% Update pending connection states with parameters exchanged via -%% hello messages -%% NOTE : Role is the role of the receiver of the hello message -%% currently being processed. -hello_pending_connection_states(Role, Version, CipherSuite, Random, Compression, - ConnectionStates) -> - ReadState = - ssl_record:pending_connection_state(ConnectionStates, read), - WriteState = - ssl_record:pending_connection_state(ConnectionStates, write), - - NewReadSecParams = - hello_security_parameters(Role, Version, ReadState, CipherSuite, - Random, Compression), - - NewWriteSecParams = - hello_security_parameters(Role, Version, WriteState, CipherSuite, - Random, Compression), - - ssl_record:update_security_params(NewReadSecParams, - NewWriteSecParams, - ConnectionStates). - -hello_security_parameters(client, Version, ConnectionState, CipherSuite, Random, - Compression) -> - SecParams = ConnectionState#connection_state.security_parameters, - NewSecParams = ssl_cipher:security_parameters(Version, CipherSuite, SecParams), - NewSecParams#security_parameters{ - server_random = Random, - compression_algorithm = Compression - }; - -hello_security_parameters(server, Version, ConnectionState, CipherSuite, Random, - Compression) -> - SecParams = ConnectionState#connection_state.security_parameters, - NewSecParams = ssl_cipher:security_parameters(Version, CipherSuite, SecParams), - NewSecParams#security_parameters{ - client_random = Random, - compression_algorithm = Compression - }. - -select_version(ClientVersion, Versions) -> - ServerVersion = ssl_record:highest_protocol_version(Versions), - ssl_record:lowest_protocol_version(ClientVersion, ServerVersion). - -select_cipher_suite([], _) -> - no_suite; -select_cipher_suite([Suite | ClientSuites], SupportedSuites) -> - case is_member(Suite, SupportedSuites) of - true -> - Suite; - false -> - select_cipher_suite(ClientSuites, SupportedSuites) - end. - -is_member(Suite, SupportedSuites) -> - lists:member(Suite, SupportedSuites). - -select_compression(_CompressionMetodes) -> - ?NULL. - -master_secret(Version, MasterSecret, #security_parameters{ - client_random = ClientRandom, - server_random = ServerRandom, - hash_size = HashSize, - prf_algorithm = PrfAlgo, - key_material_length = KML, - expanded_key_material_length = EKML, - iv_size = IVS}, - ConnectionStates, Role) -> - {ClientWriteMacSecret, ServerWriteMacSecret, ClientWriteKey, - ServerWriteKey, ClientIV, ServerIV} = - setup_keys(Version, PrfAlgo, MasterSecret, ServerRandom, - ClientRandom, HashSize, KML, EKML, IVS), - - ConnStates1 = ssl_record:set_master_secret(MasterSecret, ConnectionStates), - ConnStates2 = - ssl_record:set_mac_secret(ClientWriteMacSecret, ServerWriteMacSecret, - Role, ConnStates1), - - ClientCipherState = #cipher_state{iv = ClientIV, key = ClientWriteKey}, - ServerCipherState = #cipher_state{iv = ServerIV, key = ServerWriteKey}, - {MasterSecret, - ssl_record:set_pending_cipher_state(ConnStates2, ClientCipherState, - ServerCipherState, Role)}. - - -dec_hs(_, ?NEXT_PROTOCOL, <>) -> - #next_protocol{selected_protocol = SelectedProtocol}; - -dec_hs(_, ?HELLO_REQUEST, <<>>) -> - #hello_request{}; - -%% Client hello v2. -%% The server must be able to receive such messages, from clients that -%% are willing to use ssl v3 or higher, but have ssl v2 compatibility. -dec_hs(_Version, ?CLIENT_HELLO, <>) -> - #client_hello{client_version = {Major, Minor}, - random = ssl_ssl2:client_random(ChallengeData, CDLength), - session_id = 0, - cipher_suites = from_3bytes(CipherSuites), - compression_methods = [?NULL], - renegotiation_info = undefined - }; -dec_hs(_Version, ?CLIENT_HELLO, <>) -> - - DecodedExtensions = dec_hello_extensions(Extensions), - RenegotiationInfo = proplists:get_value(renegotiation_info, DecodedExtensions, undefined), - SRP = proplists:get_value(srp, DecodedExtensions, undefined), - HashSigns = proplists:get_value(hash_signs, DecodedExtensions, undefined), - EllipticCurves = proplists:get_value(elliptic_curves, DecodedExtensions, - undefined), - NextProtocolNegotiation = proplists:get_value(next_protocol_negotiation, DecodedExtensions, undefined), - - #client_hello{ - client_version = {Major,Minor}, - random = Random, - session_id = Session_ID, - cipher_suites = from_2bytes(CipherSuites), - compression_methods = Comp_methods, - renegotiation_info = RenegotiationInfo, - srp = SRP, - hash_signs = HashSigns, - elliptic_curves = EllipticCurves, - next_protocol_negotiation = NextProtocolNegotiation - }; - -dec_hs(_Version, ?SERVER_HELLO, <>) -> - #server_hello{ - server_version = {Major,Minor}, - random = Random, - session_id = Session_ID, - cipher_suite = Cipher_suite, - compression_method = Comp_method, - renegotiation_info = undefined, - hash_signs = undefined, - elliptic_curves = undefined}; - -dec_hs(_Version, ?SERVER_HELLO, <>) -> - - HelloExtensions = dec_hello_extensions(Extensions, []), - RenegotiationInfo = proplists:get_value(renegotiation_info, HelloExtensions, - undefined), - HashSigns = proplists:get_value(hash_signs, HelloExtensions, - undefined), - EllipticCurves = proplists:get_value(elliptic_curves, HelloExtensions, - undefined), - NextProtocolNegotiation = proplists:get_value(next_protocol_negotiation, HelloExtensions, undefined), - - #server_hello{ - server_version = {Major,Minor}, - random = Random, - session_id = Session_ID, - cipher_suite = Cipher_suite, - compression_method = Comp_method, - renegotiation_info = RenegotiationInfo, - hash_signs = HashSigns, - elliptic_curves = EllipticCurves, - next_protocol_negotiation = NextProtocolNegotiation}; -dec_hs(_Version, ?CERTIFICATE, <>) -> - #certificate{asn1_certificates = certs_to_list(ASN1Certs)}; -dec_hs(_Version, ?SERVER_KEY_EXCHANGE, Keys) -> - #server_key_exchange{exchange_keys = Keys}; -dec_hs({Major, Minor}, ?CERTIFICATE_REQUEST, - <>) - when Major == 3, Minor >= 3 -> - HashSignAlgos = [{ssl_cipher:hash_algorithm(Hash), ssl_cipher:sign_algorithm(Sign)} || - <> <= HashSigns], - #certificate_request{certificate_types = CertTypes, - hashsign_algorithms = #hash_sign_algos{hash_sign_algos = HashSignAlgos}, - certificate_authorities = CertAuths}; -dec_hs(_Version, ?CERTIFICATE_REQUEST, - <>) -> - #certificate_request{certificate_types = CertTypes, - certificate_authorities = CertAuths}; -dec_hs(_Version, ?SERVER_HELLO_DONE, <<>>) -> - #server_hello_done{}; -dec_hs({Major, Minor}, ?CERTIFICATE_VERIFY,<>) - when Major == 3, Minor >= 3 -> - #certificate_verify{hashsign_algorithm = hashsign_dec(HashSign), signature = Signature}; -dec_hs(_Version, ?CERTIFICATE_VERIFY,<>)-> - #certificate_verify{signature = Signature}; -dec_hs(_Version, ?CLIENT_KEY_EXCHANGE, PKEPMS) -> - #client_key_exchange{exchange_keys = PKEPMS}; -dec_hs(_Version, ?FINISHED, VerifyData) -> - #finished{verify_data = VerifyData}; -dec_hs(_, _, _) -> - throw(?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE)). - -dec_client_key(PKEPMS, ?KEY_EXCHANGE_RSA, {3, 0}) -> - #encrypted_premaster_secret{premaster_secret = PKEPMS}; -dec_client_key(<>, ?KEY_EXCHANGE_RSA, _) -> - #encrypted_premaster_secret{premaster_secret = PKEPMS}; -dec_client_key(<<>>, ?KEY_EXCHANGE_DIFFIE_HELLMAN, _) -> - throw(?ALERT_REC(?FATAL, ?UNSUPPORTED_CERTIFICATE)); -dec_client_key(<>, - ?KEY_EXCHANGE_DIFFIE_HELLMAN, _) -> - #client_diffie_hellman_public{dh_public = DH_Y}; -dec_client_key(<<>>, ?KEY_EXCHANGE_EC_DIFFIE_HELLMAN, _) -> - throw(?ALERT_REC(?FATAL, ?UNSUPPORTED_CERTIFICATE)); -dec_client_key(<>, - ?KEY_EXCHANGE_EC_DIFFIE_HELLMAN, _) -> - #client_ec_diffie_hellman_public{dh_public = DH_Y}; -dec_client_key(<>, - ?KEY_EXCHANGE_PSK, _) -> - #client_psk_identity{identity = Id}; -dec_client_key(<>, - ?KEY_EXCHANGE_DHE_PSK, _) -> - #client_dhe_psk_identity{identity = Id, dh_public = DH_Y}; -dec_client_key(<>, - ?KEY_EXCHANGE_RSA_PSK, {3, 0}) -> - #client_rsa_psk_identity{identity = Id, exchange_keys = #encrypted_premaster_secret{premaster_secret = PKEPMS}}; -dec_client_key(<>, - ?KEY_EXCHANGE_RSA_PSK, _) -> - #client_rsa_psk_identity{identity = Id, exchange_keys = #encrypted_premaster_secret{premaster_secret = PKEPMS}}; -dec_client_key(<>, - ?KEY_EXCHANGE_SRP, _) -> - #client_srp_public{srp_a = A}. - -dec_ske_params(Len, Keys, Version) -> - <> = Keys, - dec_ske_signature(Params, Signature, Version). - -dec_ske_signature(Params, <>, {Major, Minor}) - when Major == 3, Minor >= 3 -> - HashSign = {ssl_cipher:hash_algorithm(HashAlgo), ssl_cipher:sign_algorithm(SignAlgo)}, - {Params, HashSign, <<>>}; -dec_ske_signature(Params, <>, {Major, Minor}) - when Major == 3, Minor >= 3 -> - HashSign = {ssl_cipher:hash_algorithm(HashAlgo), ssl_cipher:sign_algorithm(SignAlgo)}, - {Params, HashSign, Signature}; -dec_ske_signature(Params, <<>>, _) -> - {Params, {null, anon}, <<>>}; -dec_ske_signature(Params, <>, _) -> - {Params, {null, anon}, <<>>}; -dec_ske_signature(Params, <>, _) -> - {Params, undefined, Signature}; -dec_ske_signature(_, _, _) -> - throw(?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE)). - -dec_server_key(<> = KeyStruct, - ?KEY_EXCHANGE_DIFFIE_HELLMAN, Version) -> - Params = #server_dh_params{dh_p = P, dh_g = G, dh_y = Y}, - {BinMsg, HashSign, Signature} = dec_ske_params(PLen + GLen + YLen + 6, KeyStruct, Version), - #server_key_params{params = Params, - params_bin = BinMsg, - hashsign = HashSign, - signature = Signature}; -%% ECParameters with named_curve -%% TODO: explicit curve -dec_server_key(<> = KeyStruct, - ?KEY_EXCHANGE_EC_DIFFIE_HELLMAN, Version) -> - Params = #server_ecdh_params{curve = {namedCurve, ssl_tls1:enum_to_oid(CurveID)}, - public = ECPoint}, - {BinMsg, HashSign, Signature} = dec_ske_params(PointLen + 4, KeyStruct, Version), - #server_key_params{params = Params, - params_bin = BinMsg, - hashsign = HashSign, - signature = Signature}; -dec_server_key(<> = KeyStruct, - KeyExchange, Version) - when KeyExchange == ?KEY_EXCHANGE_PSK; KeyExchange == ?KEY_EXCHANGE_RSA_PSK -> - Params = #server_psk_params{ - hint = PskIdentityHint}, - {BinMsg, HashSign, Signature} = dec_ske_params(Len + 2, KeyStruct, Version), - #server_key_params{params = Params, - params_bin = BinMsg, - hashsign = HashSign, - signature = Signature}; -dec_server_key(<> = KeyStruct, - ?KEY_EXCHANGE_DHE_PSK, Version) -> - DHParams = #server_dh_params{dh_p = P, dh_g = G, dh_y = Y}, - Params = #server_dhe_psk_params{ - hint = IdentityHint, - dh_params = DHParams}, - {BinMsg, HashSign, Signature} = dec_ske_params(Len + PLen + GLen + YLen + 8, KeyStruct, Version), - #server_key_params{params = Params, - params_bin = BinMsg, - hashsign = HashSign, - signature = Signature}; -dec_server_key(<> = KeyStruct, - ?KEY_EXCHANGE_SRP, Version) -> - Params = #server_srp_params{srp_n = N, srp_g = G, srp_s = S, srp_b = B}, - {BinMsg, HashSign, Signature} = dec_ske_params(NLen + GLen + SLen + BLen + 7, KeyStruct, Version), - #server_key_params{params = Params, - params_bin = BinMsg, - hashsign = HashSign, - signature = Signature}; -dec_server_key(_, _, _) -> - throw(?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE)). - -dec_hello_extensions(<<>>) -> - []; -dec_hello_extensions(<>) -> - dec_hello_extensions(Extensions, []); -dec_hello_extensions(_) -> - []. - -dec_hello_extensions(<<>>, Acc) -> - Acc; -dec_hello_extensions(<>, Acc) -> - Prop = {next_protocol_negotiation, #next_protocol_negotiation{extension_data = ExtensionData}}, - dec_hello_extensions(Rest, [Prop | Acc]); -dec_hello_extensions(<>, Acc) -> - RenegotiateInfo = case Len of - 1 -> % Initial handshake - Info; % should be <<0>> will be matched in handle_renegotiation_info - _ -> - VerifyLen = Len - 1, - <> = Info, - VerifyInfo - end, - dec_hello_extensions(Rest, [{renegotiation_info, - #renegotiation_info{renegotiated_connection = RenegotiateInfo}} | Acc]); - -dec_hello_extensions(<>, Acc) - when Len == SRPLen + 2 -> - dec_hello_extensions(Rest, [{srp, - #srp{username = SRP}} | Acc]); - -dec_hello_extensions(<>, Acc) -> - SignAlgoListLen = Len - 2, - <> = ExtData, - HashSignAlgos = [{ssl_cipher:hash_algorithm(Hash), ssl_cipher:sign_algorithm(Sign)} || - <> <= SignAlgoList], - dec_hello_extensions(Rest, [{hash_signs, - #hash_sign_algos{hash_sign_algos = HashSignAlgos}} | Acc]); - -dec_hello_extensions(<>, Acc) -> - EllipticCurveListLen = Len - 2, - <> = ExtData, - EllipticCurves = [ssl_tls1:enum_to_oid(X) || <> <= EllipticCurveList], - dec_hello_extensions(Rest, [{elliptic_curves, - #elliptic_curves{elliptic_curve_list = EllipticCurves}} | Acc]); - -dec_hello_extensions(<>, Acc) -> - ECPointFormatListLen = Len - 1, - <> = ExtData, - ECPointFormats = binary_to_list(ECPointFormatList), - dec_hello_extensions(Rest, [{ec_point_formats, - #ec_point_formats{ec_point_format_list = ECPointFormats}} | Acc]); - -%% Ignore data following the ClientHello (i.e., -%% extensions) if not understood. - -dec_hello_extensions(<>, Acc) -> - dec_hello_extensions(Rest, Acc); -%% This theoretically should not happen if the protocol is followed, but if it does it is ignored. -dec_hello_extensions(_, Acc) -> - Acc. - -encrypted_premaster_secret(Secret, RSAPublicKey) -> - try - PreMasterSecret = public_key:encrypt_public(Secret, RSAPublicKey, - [{rsa_pad, - rsa_pkcs1_padding}]), - #encrypted_premaster_secret{premaster_secret = PreMasterSecret} - catch - _:_-> - throw(?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE)) - end. - -%% encode/decode stream of certificate data to/from list of certificate data -certs_to_list(ASN1Certs) -> - certs_to_list(ASN1Certs, []). - -certs_to_list(<>, Acc) -> - certs_to_list(Rest, [Cert | Acc]); -certs_to_list(<<>>, Acc) -> - lists:reverse(Acc, []). - -certs_from_list(ACList) -> - list_to_binary([begin - CertLen = byte_size(Cert), - <> - end || Cert <- ACList]). - -enc_hs(#next_protocol{selected_protocol = SelectedProtocol}, _Version) -> - PaddingLength = 32 - ((byte_size(SelectedProtocol) + 2) rem 32), - - {?NEXT_PROTOCOL, <>}; -enc_hs(#hello_request{}, _Version) -> - {?HELLO_REQUEST, <<>>}; -enc_hs(#client_hello{client_version = {Major, Minor}, - random = Random, - session_id = SessionID, - cipher_suites = CipherSuites, - compression_methods = CompMethods, - renegotiation_info = RenegotiationInfo, - srp = SRP, - hash_signs = HashSigns, - ec_point_formats = EcPointFormats, - elliptic_curves = EllipticCurves, - next_protocol_negotiation = NextProtocolNegotiation}, _Version) -> - SIDLength = byte_size(SessionID), - BinCompMethods = list_to_binary(CompMethods), - CmLength = byte_size(BinCompMethods), - BinCipherSuites = list_to_binary(CipherSuites), - CsLength = byte_size(BinCipherSuites), - Extensions0 = hello_extensions(RenegotiationInfo, SRP, NextProtocolNegotiation) - ++ ec_hello_extensions(lists:map(fun ssl_cipher:suite_definition/1, CipherSuites), EcPointFormats) - ++ ec_hello_extensions(lists:map(fun ssl_cipher:suite_definition/1, CipherSuites), EllipticCurves), - Extensions1 = if - Major == 3, Minor >=3 -> Extensions0 ++ hello_extensions(HashSigns); - true -> Extensions0 - end, - ExtensionsBin = enc_hello_extensions(Extensions1), - - {?CLIENT_HELLO, <>}; - -enc_hs(#server_hello{server_version = {Major, Minor}, - random = Random, - session_id = Session_ID, - cipher_suite = CipherSuite, - compression_method = Comp_method, - renegotiation_info = RenegotiationInfo, - ec_point_formats = EcPointFormats, - elliptic_curves = EllipticCurves, - next_protocol_negotiation = NextProtocolNegotiation}, _Version) -> - SID_length = byte_size(Session_ID), - CipherSuites = [ssl_cipher:suite_definition(CipherSuite)], - Extensions = hello_extensions(RenegotiationInfo, NextProtocolNegotiation) - ++ ec_hello_extensions(CipherSuites, EcPointFormats) - ++ ec_hello_extensions(CipherSuites, EllipticCurves), - ExtensionsBin = enc_hello_extensions(Extensions), - {?SERVER_HELLO, <>}; -enc_hs(#certificate{asn1_certificates = ASN1CertList}, _Version) -> - ASN1Certs = certs_from_list(ASN1CertList), - ACLen = erlang:iolist_size(ASN1Certs), - {?CERTIFICATE, <>}; -enc_hs(#server_key_exchange{exchange_keys = Keys}, _Version) -> - {?SERVER_KEY_EXCHANGE, Keys}; -enc_hs(#server_key_params{params_bin = Keys, hashsign = HashSign, - signature = Signature}, Version) -> - EncSign = enc_sign(HashSign, Signature, Version), - {?SERVER_KEY_EXCHANGE, <>}; -enc_hs(#certificate_request{certificate_types = CertTypes, - hashsign_algorithms = #hash_sign_algos{hash_sign_algos = HashSignAlgos}, - certificate_authorities = CertAuths}, - {Major, Minor}) - when Major == 3, Minor >= 3 -> - HashSigns= << <<(ssl_cipher:hash_algorithm(Hash)):8, (ssl_cipher:sign_algorithm(Sign)):8>> || - {Hash, Sign} <- HashSignAlgos >>, - CertTypesLen = byte_size(CertTypes), - HashSignsLen = byte_size(HashSigns), - CertAuthsLen = byte_size(CertAuths), - {?CERTIFICATE_REQUEST, - <> - }; -enc_hs(#certificate_request{certificate_types = CertTypes, - certificate_authorities = CertAuths}, - _Version) -> - CertTypesLen = byte_size(CertTypes), - CertAuthsLen = byte_size(CertAuths), - {?CERTIFICATE_REQUEST, - <> - }; -enc_hs(#server_hello_done{}, _Version) -> - {?SERVER_HELLO_DONE, <<>>}; -enc_hs(#client_key_exchange{exchange_keys = ExchangeKeys}, Version) -> - {?CLIENT_KEY_EXCHANGE, enc_cke(ExchangeKeys, Version)}; -enc_hs(#certificate_verify{signature = BinSig, hashsign_algorithm = HashSign}, Version) -> - EncSig = enc_sign(HashSign, BinSig, Version), - {?CERTIFICATE_VERIFY, EncSig}; -enc_hs(#finished{verify_data = VerifyData}, _Version) -> - {?FINISHED, VerifyData}. - -enc_cke(#encrypted_premaster_secret{premaster_secret = PKEPMS},{3, 0}) -> - PKEPMS; -enc_cke(#encrypted_premaster_secret{premaster_secret = PKEPMS}, _) -> - PKEPMSLen = byte_size(PKEPMS), - <>; -enc_cke(#client_diffie_hellman_public{dh_public = DHPublic}, _) -> - Len = byte_size(DHPublic), - <>; -enc_cke(#client_ec_diffie_hellman_public{dh_public = DHPublic}, _) -> - Len = byte_size(DHPublic), - <>; -enc_cke(#client_psk_identity{identity = undefined}, _) -> - Id = <<"psk_identity">>, - Len = byte_size(Id), - <>; -enc_cke(#client_psk_identity{identity = Id}, _) -> - Len = byte_size(Id), - <>; -enc_cke(Identity = #client_dhe_psk_identity{identity = undefined}, Version) -> - enc_cke(Identity#client_dhe_psk_identity{identity = <<"psk_identity">>}, Version); -enc_cke(#client_dhe_psk_identity{identity = Id, dh_public = DHPublic}, _) -> - Len = byte_size(Id), - DHLen = byte_size(DHPublic), - <>; -enc_cke(Identity = #client_rsa_psk_identity{identity = undefined}, Version) -> - enc_cke(Identity#client_rsa_psk_identity{identity = <<"psk_identity">>}, Version); -enc_cke(#client_rsa_psk_identity{identity = Id, exchange_keys = ExchangeKeys}, Version) -> - EncPMS = enc_cke(ExchangeKeys, Version), - Len = byte_size(Id), - <>; -enc_cke(#client_srp_public{srp_a = A}, _) -> - Len = byte_size(A), - <>. - -enc_server_key(#server_dh_params{dh_p = P, dh_g = G, dh_y = Y}) -> - PLen = byte_size(P), - GLen = byte_size(G), - YLen = byte_size(Y), - <>; -enc_server_key(#server_ecdh_params{curve = {namedCurve, ECCurve}, public = ECPubKey}) -> - %%TODO: support arbitrary keys - KLen = size(ECPubKey), - <>; -enc_server_key(#server_psk_params{hint = PskIdentityHint}) -> - Len = byte_size(PskIdentityHint), - <>; -enc_server_key(Params = #server_dhe_psk_params{hint = undefined}) -> - enc_server_key(Params#server_dhe_psk_params{hint = <<>>}); -enc_server_key(#server_dhe_psk_params{ - hint = PskIdentityHint, - dh_params = #server_dh_params{dh_p = P, dh_g = G, dh_y = Y}}) -> - Len = byte_size(PskIdentityHint), - PLen = byte_size(P), - GLen = byte_size(G), - YLen = byte_size(Y), - <>; -enc_server_key(#server_srp_params{srp_n = N, srp_g = G, srp_s = S, srp_b = B}) -> - NLen = byte_size(N), - GLen = byte_size(G), - SLen = byte_size(S), - BLen = byte_size(B), - <>. - -enc_sign({_, anon}, _Sign, _Version) -> - <<>>; -enc_sign({HashAlg, SignAlg}, Signature, _Version = {Major, Minor}) - when Major == 3, Minor >= 3-> - SignLen = byte_size(Signature), - HashSign = hashsign_enc(HashAlg, SignAlg), - <>; -enc_sign(_HashSign, Sign, _Version) -> - SignLen = byte_size(Sign), - <>. - - -ec_hello_extensions(CipherSuites, #elliptic_curves{} = Info) -> - case advertises_ec_ciphers(CipherSuites) of - true -> - [Info]; - false -> - [] - end; -ec_hello_extensions(CipherSuites, #ec_point_formats{} = Info) -> - case advertises_ec_ciphers(CipherSuites) of - true -> - [Info]; - false -> - [] - end; -ec_hello_extensions(_, undefined) -> - []. - -hello_extensions(RenegotiationInfo, NextProtocolNegotiation) -> - hello_extensions(RenegotiationInfo) ++ next_protocol_extension(NextProtocolNegotiation). - -hello_extensions(RenegotiationInfo, SRP, NextProtocolNegotiation) -> - hello_extensions(RenegotiationInfo) - ++ hello_extensions(SRP) - ++ next_protocol_extension(NextProtocolNegotiation). - -advertises_ec_ciphers([]) -> - false; -advertises_ec_ciphers([{ecdh_ecdsa, _,_,_} | _]) -> - true; -advertises_ec_ciphers([{ecdhe_ecdsa, _,_,_} | _]) -> - true; -advertises_ec_ciphers([{ecdh_rsa, _,_,_} | _]) -> - true; -advertises_ec_ciphers([{ecdhe_rsa, _,_,_} | _]) -> - true; -advertises_ec_ciphers([{ecdh_anon, _,_,_} | _]) -> - true; -advertises_ec_ciphers([_| Rest]) -> - advertises_ec_ciphers(Rest). - -%% Renegotiation info -hello_extensions(#renegotiation_info{renegotiated_connection = undefined}) -> - []; -hello_extensions(#renegotiation_info{} = Info) -> - [Info]; -hello_extensions(#srp{} = Info) -> - [Info]; -hello_extensions(#hash_sign_algos{} = Info) -> - [Info]; -hello_extensions(undefined) -> - []. - -next_protocol_extension(undefined) -> - []; -next_protocol_extension(#next_protocol_negotiation{} = Info) -> - [Info]. - -enc_hello_extensions(Extensions) -> - enc_hello_extensions(Extensions, <<>>). -enc_hello_extensions([], <<>>) -> - <<>>; -enc_hello_extensions([], Acc) -> - Size = byte_size(Acc), - <>; - -enc_hello_extensions([#next_protocol_negotiation{extension_data = ExtensionData} | Rest], Acc) -> - Len = byte_size(ExtensionData), - enc_hello_extensions(Rest, <>); -enc_hello_extensions([#renegotiation_info{renegotiated_connection = ?byte(0) = Info} | Rest], Acc) -> - Len = byte_size(Info), - enc_hello_extensions(Rest, <>); - -enc_hello_extensions([#renegotiation_info{renegotiated_connection = Info} | Rest], Acc) -> - InfoLen = byte_size(Info), - Len = InfoLen +1, - enc_hello_extensions(Rest, <>); -enc_hello_extensions([#elliptic_curves{elliptic_curve_list = EllipticCurves} | Rest], Acc) -> - EllipticCurveList = << <<(ssl_tls1:oid_to_enum(X)):16>> || X <- EllipticCurves>>, - ListLen = byte_size(EllipticCurveList), - Len = ListLen + 2, - enc_hello_extensions(Rest, <>); -enc_hello_extensions([#ec_point_formats{ec_point_format_list = ECPointFormats} | Rest], Acc) -> - ECPointFormatList = list_to_binary(ECPointFormats), - ListLen = byte_size(ECPointFormatList), - Len = ListLen + 1, - enc_hello_extensions(Rest, <>); -enc_hello_extensions([#srp{username = UserName} | Rest], Acc) -> - SRPLen = byte_size(UserName), - Len = SRPLen + 2, - enc_hello_extensions(Rest, <>); -enc_hello_extensions([#hash_sign_algos{hash_sign_algos = HashSignAlgos} | Rest], Acc) -> - SignAlgoList = << <<(ssl_cipher:hash_algorithm(Hash)):8, (ssl_cipher:sign_algorithm(Sign)):8>> || - {Hash, Sign} <- HashSignAlgos >>, - ListLen = byte_size(SignAlgoList), - Len = ListLen + 2, - enc_hello_extensions(Rest, <>). - -encode_client_protocol_negotiation(undefined, _) -> - undefined; -encode_client_protocol_negotiation(_, false) -> - #next_protocol_negotiation{extension_data = <<>>}; -encode_client_protocol_negotiation(_, _) -> - undefined. - -from_3bytes(Bin3) -> - from_3bytes(Bin3, []). - -from_3bytes(<<>>, Acc) -> - lists:reverse(Acc); -from_3bytes(<>, Acc) -> - from_3bytes(Rest, [?uint16(N) | Acc]). - -from_2bytes(Bin2) -> - from_2bytes(Bin2, []). - -from_2bytes(<<>>, Acc) -> - lists:reverse(Acc); -from_2bytes(<>, Acc) -> - from_2bytes(Rest, [?uint16(N) | Acc]). - -certificate_types({KeyExchange, _, _, _}) - when KeyExchange == rsa; - KeyExchange == dhe_dss; - KeyExchange == dhe_rsa; - KeyExchange == ecdhe_rsa -> - <>; - -certificate_types({KeyExchange, _, _, _}) - when KeyExchange == dh_ecdsa; - KeyExchange == dhe_ecdsa -> - <>; - -certificate_types(_) -> - <>. - -hashsign_dec(<>) -> - {ssl_cipher:hash_algorithm(HashAlgo), ssl_cipher:sign_algorithm(SignAlgo)}. - -hashsign_enc(HashAlgo, SignAlgo) -> - Hash = ssl_cipher:hash_algorithm(HashAlgo), - Sign = ssl_cipher:sign_algorithm(SignAlgo), - <>. - -certificate_authorities(CertDbHandle, CertDbRef) -> - Authorities = certificate_authorities_from_db(CertDbHandle, CertDbRef), - Enc = fun(#'OTPCertificate'{tbsCertificate=TBSCert}) -> - OTPSubj = TBSCert#'OTPTBSCertificate'.subject, - DNEncodedBin = public_key:pkix_encode('Name', OTPSubj, otp), - DNEncodedLen = byte_size(DNEncodedBin), - <> - end, - list_to_binary([Enc(Cert) || {_, Cert} <- Authorities]). - -certificate_authorities_from_db(CertDbHandle, CertDbRef) -> - ConnectionCerts = fun({{Ref, _, _}, Cert}, Acc) when Ref == CertDbRef -> - [Cert | Acc]; - (_, Acc) -> - Acc - end, - ssl_pkix_db:foldl(ConnectionCerts, [], CertDbHandle). - - -digitally_signed({3, Minor}, Hash, HashAlgo, Key) when Minor >= 3 -> - public_key:sign({digest, Hash}, HashAlgo, Key); -digitally_signed(_Version, Hash, HashAlgo, #'DSAPrivateKey'{} = Key) -> - public_key:sign({digest, Hash}, HashAlgo, Key); -digitally_signed(_Version, Hash, _HashAlgo, #'RSAPrivateKey'{} = Key) -> - public_key:encrypt_private(Hash, Key, - [{rsa_pad, rsa_pkcs1_padding}]); -digitally_signed(_Version, Hash, HashAlgo, Key) -> - public_key:sign({digest, Hash}, HashAlgo, Key). - -calc_master_secret({3,0}, _PrfAlgo, PremasterSecret, ClientRandom, ServerRandom) -> - ssl_ssl3:master_secret(PremasterSecret, ClientRandom, ServerRandom); - -calc_master_secret({3,_}, PrfAlgo, PremasterSecret, ClientRandom, ServerRandom) -> - ssl_tls1:master_secret(PrfAlgo, PremasterSecret, ClientRandom, ServerRandom). - -setup_keys({3,0}, _PrfAlgo, MasterSecret, - ServerRandom, ClientRandom, HashSize, KML, EKML, IVS) -> - ssl_ssl3:setup_keys(MasterSecret, ServerRandom, - ClientRandom, HashSize, KML, EKML, IVS); - -setup_keys({3,N}, PrfAlgo, MasterSecret, - ServerRandom, ClientRandom, HashSize, KML, _EKML, IVS) -> - ssl_tls1:setup_keys(N, PrfAlgo, MasterSecret, ServerRandom, ClientRandom, HashSize, - KML, IVS). - -calc_finished({3, 0}, Role, _PrfAlgo, MasterSecret, Handshake) -> - ssl_ssl3:finished(Role, MasterSecret, lists:reverse(Handshake)); -calc_finished({3, N}, Role, PrfAlgo, MasterSecret, Handshake) -> - ssl_tls1:finished(Role, N, PrfAlgo, MasterSecret, lists:reverse(Handshake)). - -calc_certificate_verify({3, 0}, HashAlgo, MasterSecret, Handshake) -> - ssl_ssl3:certificate_verify(HashAlgo, MasterSecret, lists:reverse(Handshake)); -calc_certificate_verify({3, N}, HashAlgo, _MasterSecret, Handshake) -> - ssl_tls1:certificate_verify(HashAlgo, N, lists:reverse(Handshake)). - -key_exchange_alg(rsa) -> - ?KEY_EXCHANGE_RSA; -key_exchange_alg(Alg) when Alg == dhe_rsa; Alg == dhe_dss; - Alg == dh_dss; Alg == dh_rsa; Alg == dh_anon -> - ?KEY_EXCHANGE_DIFFIE_HELLMAN; -key_exchange_alg(Alg) when Alg == ecdhe_rsa; Alg == ecdh_rsa; - Alg == ecdhe_ecdsa; Alg == ecdh_ecdsa; - Alg == ecdh_anon -> - ?KEY_EXCHANGE_EC_DIFFIE_HELLMAN; -key_exchange_alg(psk) -> - ?KEY_EXCHANGE_PSK; -key_exchange_alg(dhe_psk) -> - ?KEY_EXCHANGE_DHE_PSK; -key_exchange_alg(rsa_psk) -> - ?KEY_EXCHANGE_RSA_PSK; -key_exchange_alg(Alg) - when Alg == srp_rsa; Alg == srp_dss; Alg == srp_anon -> - ?KEY_EXCHANGE_SRP; -key_exchange_alg(_) -> - ?NULL. - -apply_user_fun(Fun, OtpCert, ExtensionOrError, UserState0, SslState) -> - case Fun(OtpCert, ExtensionOrError, UserState0) of - {valid, UserState} -> - {valid, {SslState, UserState}}; - {fail, _} = Fail -> - Fail; - {unknown, UserState} -> - {unknown, {SslState, UserState}} - end. - --define(TLSEXT_SIGALG_RSA(MD), {MD, rsa}). --define(TLSEXT_SIGALG_DSA(MD), {MD, dsa}). --define(TLSEXT_SIGALG_ECDSA(MD), {MD, ecdsa}). - --define(TLSEXT_SIGALG(MD), ?TLSEXT_SIGALG_ECDSA(MD), ?TLSEXT_SIGALG_RSA(MD)). - -default_hash_signs() -> - HashSigns = [?TLSEXT_SIGALG(sha512), - ?TLSEXT_SIGALG(sha384), - ?TLSEXT_SIGALG(sha256), - ?TLSEXT_SIGALG(sha224), - ?TLSEXT_SIGALG(sha), - ?TLSEXT_SIGALG_DSA(sha), - ?TLSEXT_SIGALG_RSA(md5)], - CryptoSupport = proplists:get_value(public_keys, crypto:supports()), - HasECC = proplists:get_bool(ecdsa, CryptoSupport), - #hash_sign_algos{hash_sign_algos = - lists:filter(fun({_, ecdsa}) -> HasECC; - (_) -> true end, HashSigns)}. - -handle_hello_extensions(#client_hello{random = Random, - cipher_suites = CipherSuites, - renegotiation_info = Info, - srp = SRP, - ec_point_formats = EcPointFormats0, - elliptic_curves = EllipticCurves0} = Hello, Version, - #ssl_options{secure_renegotiate = SecureRenegotation} = Opts, - Session0, ConnectionStates0, Renegotiation) -> - Session = handle_srp_extension(SRP, Session0), - ConnectionStates = handle_renegotiation_extension(Version, Info, Random, Session, ConnectionStates0, - Renegotiation, SecureRenegotation, CipherSuites), - ProtocolsToAdvertise = handle_next_protocol_extension(Hello, Renegotiation, Opts), - {EcPointFormats, EllipticCurves} = handle_ecc_extensions(Version, EcPointFormats0, EllipticCurves0), - %%TODO make extensions compund data structure - {Session, ConnectionStates, ProtocolsToAdvertise, EcPointFormats, EllipticCurves}. - - -handle_renegotiation_extension(Version, Info, Random, #session{cipher_suite = CipherSuite, - compression_method = Compression}, - ConnectionStates0, Renegotiation, SecureRenegotation, CipherSuites) -> - case handle_renegotiation_info(server, Info, ConnectionStates0, - Renegotiation, SecureRenegotation, - CipherSuites) of - {ok, ConnectionStates1} -> - hello_pending_connection_states(server, - Version, - CipherSuite, - Random, - Compression, - ConnectionStates1); - #alert{} = Alert -> - throw(Alert) - end. - -handle_next_protocol_extension(Hello, Renegotiation, SslOpts)-> - case handle_next_protocol_on_server(Hello, Renegotiation, SslOpts) of - #alert{} = Alert -> - throw(Alert); - ProtocolsToAdvertise -> - ProtocolsToAdvertise - end. - -handle_srp_extension(undefined, Session) -> - Session; -handle_srp_extension(#srp{username = Username}, Session) -> - Session#session{srp_username = Username}. - -int_to_bin(I) -> - L = (length(integer_to_list(I, 16)) + 1) div 2, - <>. -- cgit v1.2.3