diff options
Diffstat (limited to 'lib/ssl/src/ssl_cipher.erl')
| -rw-r--r-- | lib/ssl/src/ssl_cipher.erl | 684 |
1 files changed, 247 insertions, 437 deletions
diff --git a/lib/ssl/src/ssl_cipher.erl b/lib/ssl/src/ssl_cipher.erl index 3d3d11b7f3..72f02a4362 100644 --- a/lib/ssl/src/ssl_cipher.erl +++ b/lib/ssl/src/ssl_cipher.erl @@ -1,19 +1,19 @@ %% %% %CopyrightBegin% -%% -%% Copyright Ericsson AB 2007-2009. All Rights Reserved. -%% +%% +%% Copyright Ericsson AB 2007-2010. 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% %% @@ -28,27 +28,25 @@ -include("ssl_internal.hrl"). -include("ssl_record.hrl"). -include("ssl_cipher.hrl"). --include("ssl_debug.hrl"). +-include("ssl_alert.hrl"). +-include_lib("public_key/include/public_key.hrl"). -export([security_parameters/2, suite_definition/1, - decipher/4, cipher/4, - suite/1, suites/1, - openssl_suite/1, openssl_suite_name/1]). + decipher/5, cipher/4, + suite/1, suites/1, anonymous_suites/0, + openssl_suite/1, openssl_suite_name/1, filter/2]). -compile(inline). %%-------------------------------------------------------------------- -%% Function: security_parameters(CipherSuite, SecParams) -> -%% #security_parameters{} -%% -%% CipherSuite - as defined in ssl_cipher.hrl -%% SecParams - #security_parameters{} +-spec security_parameters(cipher_suite(), #security_parameters{}) -> + #security_parameters{}. %% %% Description: Returns a security parameters record where the %% cipher values has been updated according to <CipherSuite> %%------------------------------------------------------------------- security_parameters(CipherSuite, SecParams) -> - { _, Cipher, Hash, Exportable} = suite_definition(CipherSuite), + { _, Cipher, Hash} = suite_definition(CipherSuite), SecParams#security_parameters{ cipher_suite = CipherSuite, bulk_cipher_algorithm = bulk_cipher_algorithm(Cipher), @@ -58,19 +56,14 @@ security_parameters(CipherSuite, SecParams) -> key_material_length = key_material(Cipher), iv_size = iv_size(Cipher), mac_algorithm = mac_algorithm(Hash), - hash_size = hash_size(Hash), - exportable = Exportable}. + hash_size = hash_size(Hash)}. %%-------------------------------------------------------------------- -%% Function: cipher(Method, CipherState, Mac, Data) -> -%% {Encrypted, UpdateCipherState} +-spec cipher(cipher_enum(), #cipher_state{}, binary(), binary()) -> + {binary(), #cipher_state{}}. %% -%% Method - integer() (as defined in ssl_cipher.hrl) -%% CipherState, UpdatedCipherState - #cipher_state{} -%% Data, Encrypted - binary() -%% -%% Description: Encrypts the data and the mac using method, updating -%% the cipher state +%% Description: Encrypts the data and the MAC using chipher described +%% by cipher_enum() and updating the cipher state %%------------------------------------------------------------------- cipher(?NULL, CipherState, <<>>, Fragment) -> GenStreamCipherList = [Fragment, <<>>], @@ -81,20 +74,12 @@ cipher(?RC4, CipherState, Mac, Fragment) -> S -> S end, GenStreamCipherList = [Fragment, Mac], - - ?DBG_HEX(GenStreamCipherList), - ?DBG_HEX(State0), {State1, T} = crypto:rc4_encrypt_with_state(State0, GenStreamCipherList), - ?DBG_HEX(T), {T, CipherState#cipher_state{state = State1}}; cipher(?DES, CipherState, Mac, Fragment) -> block_cipher(fun(Key, IV, T) -> crypto:des_cbc_encrypt(Key, IV, T) end, block_size(des_cbc), CipherState, Mac, Fragment); -cipher(?DES40, CipherState, Mac, Fragment) -> - block_cipher(fun(Key, IV, T) -> - crypto:des_cbc_encrypt(Key, IV, T) - end, block_size(des_cbc), CipherState, Mac, Fragment); cipher(?'3DES', CipherState, Mac, Fragment) -> block_cipher(fun(<<K1:8/binary, K2:8/binary, K3:8/binary>>, IV, T) -> crypto:des3_cbc_encrypt(K1, K2, K3, IV, T) @@ -104,101 +89,94 @@ cipher(?AES, CipherState, Mac, Fragment) -> crypto:aes_cbc_128_encrypt(Key, IV, T); (Key, IV, T) when byte_size(Key) =:= 32 -> crypto:aes_cbc_256_encrypt(Key, IV, T) - end, block_size(aes_128_cbc), CipherState, Mac, Fragment); + end, block_size(aes_128_cbc), CipherState, Mac, Fragment). %% cipher(?IDEA, CipherState, Mac, Fragment) -> %% block_cipher(fun(Key, IV, T) -> %% crypto:idea_cbc_encrypt(Key, IV, T) %% end, block_size(idea_cbc), CipherState, Mac, Fragment); -cipher(?RC2, CipherState, Mac, Fragment) -> - block_cipher(fun(Key, IV, T) -> - crypto:rc2_40_cbc_encrypt(Key, IV, T) - end, block_size(rc2_cbc_40), CipherState, Mac, Fragment). block_cipher(Fun, BlockSz, #cipher_state{key=Key, iv=IV} = CS0, Mac, Fragment) -> TotSz = byte_size(Mac) + erlang:iolist_size(Fragment) + 1, {PaddingLength, Padding} = get_padding(TotSz, BlockSz), L = [Fragment, Mac, PaddingLength, Padding], - ?DBG_HEX(Key), - ?DBG_HEX(IV), - ?DBG_HEX(L), T = Fun(Key, IV, L), - ?DBG_HEX(T), NextIV = next_iv(T, IV), {T, CS0#cipher_state{iv=NextIV}}. %%-------------------------------------------------------------------- -%% Function: decipher(Method, CipherState, Mac, Data) -> -%% {Decrypted, UpdateCipherState} -%% -%% Method - integer() (as defined in ssl_cipher.hrl) -%% CipherState, UpdatedCipherState - #cipher_state{} -%% Data, Encrypted - binary() +-spec decipher(cipher_enum(), integer(), #cipher_state{}, binary(), tls_version()) -> + {binary(), binary(), #cipher_state{}} | #alert{}. %% -%% Description: Decrypts the data and the mac using method, updating -%% the cipher state +%% Description: Decrypts the data and the MAC using cipher described +%% by cipher_enum() and updating the cipher state. %%------------------------------------------------------------------- -decipher(?NULL, _HashSz, CipherState, Fragment) -> +decipher(?NULL, _HashSz, CipherState, Fragment, _) -> {Fragment, <<>>, CipherState}; -decipher(?RC4, HashSz, CipherState, Fragment) -> - ?DBG_TERM(CipherState#cipher_state.key), +decipher(?RC4, HashSz, CipherState, Fragment, _) -> State0 = case CipherState#cipher_state.state of undefined -> crypto:rc4_set_key(CipherState#cipher_state.key); S -> S end, - ?DBG_HEX(State0), - ?DBG_HEX(Fragment), - {State1, T} = crypto:rc4_encrypt_with_state(State0, Fragment), - ?DBG_HEX(T), - GSC = generic_stream_cipher_from_bin(T, HashSz), - #generic_stream_cipher{content=Content, mac=Mac} = GSC, - {Content, Mac, CipherState#cipher_state{state=State1}}; -decipher(?DES, HashSz, CipherState, Fragment) -> - block_decipher(fun(Key, IV, T) -> - crypto:des_cbc_decrypt(Key, IV, T) - end, CipherState, HashSz, Fragment); -decipher(?DES40, HashSz, CipherState, Fragment) -> + try crypto:rc4_encrypt_with_state(State0, Fragment) of + {State, Text} -> + GSC = generic_stream_cipher_from_bin(Text, HashSz), + #generic_stream_cipher{content = Content, mac = Mac} = GSC, + {Content, Mac, CipherState#cipher_state{state = State}} + catch + _:_ -> + %% This is a DECRYPTION_FAILED but + %% "differentiating between bad_record_mac and decryption_failed + %% alerts may permit certain attacks against CBC mode as used in + %% TLS [CBCATT]. It is preferable to uniformly use the + %% bad_record_mac alert to hide the specific type of the error." + ?ALERT_REC(?FATAL, ?BAD_RECORD_MAC) + end; + +decipher(?DES, HashSz, CipherState, Fragment, Version) -> block_decipher(fun(Key, IV, T) -> crypto:des_cbc_decrypt(Key, IV, T) - end, CipherState, HashSz, Fragment); -decipher(?'3DES', HashSz, CipherState, Fragment) -> + end, CipherState, HashSz, Fragment, Version); +decipher(?'3DES', HashSz, CipherState, Fragment, Version) -> block_decipher(fun(<<K1:8/binary, K2:8/binary, K3:8/binary>>, IV, T) -> crypto:des3_cbc_decrypt(K1, K2, K3, IV, T) - end, CipherState, HashSz, Fragment); -decipher(?AES, HashSz, CipherState, Fragment) -> + end, CipherState, HashSz, Fragment, Version); +decipher(?AES, HashSz, CipherState, Fragment, Version) -> block_decipher(fun(Key, IV, T) when byte_size(Key) =:= 16 -> crypto:aes_cbc_128_decrypt(Key, IV, T); (Key, IV, T) when byte_size(Key) =:= 32 -> crypto:aes_cbc_256_decrypt(Key, IV, T) - end, CipherState, HashSz, Fragment); -%% decipher(?IDEA, HashSz, CipherState, Fragment) -> + end, CipherState, HashSz, Fragment, Version). +%% decipher(?IDEA, HashSz, CipherState, Fragment, Version) -> %% block_decipher(fun(Key, IV, T) -> %% crypto:idea_cbc_decrypt(Key, IV, T) -%% end, CipherState, HashSz, Fragment); -decipher(?RC2, HashSz, CipherState, Fragment) -> - block_decipher(fun(Key, IV, T) -> - crypto:rc2_40_cbc_decrypt(Key, IV, T) - end, CipherState, HashSz, Fragment). +%% end, CipherState, HashSz, Fragment, Version); block_decipher(Fun, #cipher_state{key=Key, iv=IV} = CipherState0, - HashSz, Fragment) -> - ?DBG_HEX(Key), - ?DBG_HEX(IV), - ?DBG_HEX(Fragment), - T = Fun(Key, IV, Fragment), - ?DBG_HEX(T), - GBC = generic_block_cipher_from_bin(T, HashSz), - ok = check_padding(GBC), %% TODO kolla ocks�... - Content = GBC#generic_block_cipher.content, - Mac = GBC#generic_block_cipher.mac, - CipherState1 = CipherState0#cipher_state{iv=next_iv(Fragment, IV)}, - {Content, Mac, CipherState1}. - + HashSz, Fragment, Version) -> + try Fun(Key, IV, Fragment) of + Text -> + GBC = generic_block_cipher_from_bin(Text, HashSz), + case is_correct_padding(GBC, Version) of + true -> + Content = GBC#generic_block_cipher.content, + Mac = GBC#generic_block_cipher.mac, + CipherState1 = CipherState0#cipher_state{iv=next_iv(Fragment, IV)}, + {Content, Mac, CipherState1}; + false -> + ?ALERT_REC(?FATAL, ?BAD_RECORD_MAC) + end + catch + _:_ -> + %% This is a DECRYPTION_FAILED but + %% "differentiating between bad_record_mac and decryption_failed + %% alerts may permit certain attacks against CBC mode as used in + %% TLS [CBCATT]. It is preferable to uniformly use the + %% bad_record_mac alert to hide the specific type of the error." + ?ALERT_REC(?FATAL, ?BAD_RECORD_MAC) + end. %%-------------------------------------------------------------------- -%% Function: suites(Version) -> [Suite] -%% -%% Version = version() -%% Suite = binary() from ssl_cipher.hrl +-spec suites(tls_version()) -> [cipher_suite()]. %% %% Description: Returns a list of supported cipher suites. %%-------------------------------------------------------------------- @@ -208,294 +186,138 @@ suites({3, N}) when N == 1; N == 2 -> ssl_tls1:suites(). %%-------------------------------------------------------------------- -%% Function: suite_definition(CipherSuite) -> -%% {KeyExchange, Cipher, Hash, Exportable} -%% +-spec anonymous_suites() -> [cipher_suite()]. %% -%% CipherSuite - as defined in ssl_cipher.hrl -%% KeyExchange - rsa | dh_dss | dh_rsa | dh_anon | dhe_dss | dhe_rsa -%% krb5 | *_export (old ssl) -%% Cipher - null | rc4_128 | idea_cbc | des_cbc | '3des_ede_cbc' -%% des40_cbc | dh_dss | aes_128_cbc | aes_256_cbc | -%% rc2_cbc_40 | rc4_40 -%% Hash - null | md5 | sha -%% Exportable - export | no_export | ignore(?) +%% Description: Returns a list of the anonymous cipher suites, only supported +%% if explicitly set by user. Intended only for testing. +%%-------------------------------------------------------------------- +anonymous_suites() -> + [?TLS_DH_anon_WITH_RC4_128_MD5, + ?TLS_DH_anon_WITH_DES_CBC_SHA, + ?TLS_DH_anon_WITH_3DES_EDE_CBC_SHA, + ?TLS_DH_anon_WITH_AES_128_CBC_SHA, + ?TLS_DH_anon_WITH_AES_256_CBC_SHA]. + +%%-------------------------------------------------------------------- +-spec suite_definition(cipher_suite()) -> erl_cipher_suite(). %% -%% Description: Returns a security parameters record where the -%% cipher values has been updated according to <CipherSuite> -%% Note: since idea is unsupported on the openssl version used by -%% crypto (as of OTP R12B), we've commented away the idea stuff +%% Description: Return erlang cipher suite definition. +%% Note: Currently not supported suites are commented away. +%% They should be supported or removed in the future. %%------------------------------------------------------------------- %% TLS v1.1 suites suite_definition(?TLS_NULL_WITH_NULL_NULL) -> - {null, null, null, ignore}; -suite_definition(?TLS_RSA_WITH_NULL_MD5) -> - {rsa, null, md5, ignore}; -suite_definition(?TLS_RSA_WITH_NULL_SHA) -> - {rsa, null, sha, ignore}; -suite_definition(?TLS_RSA_WITH_RC4_128_MD5) -> % ok - {rsa, rc4_128, md5, no_export}; -suite_definition(?TLS_RSA_WITH_RC4_128_SHA) -> % ok - {rsa, rc4_128, sha, no_export}; -%% suite_definition(?TLS_RSA_WITH_IDEA_CBC_SHA) -> % unsupported -%% {rsa, idea_cbc, sha, no_export}; -suite_definition(?TLS_RSA_WITH_DES_CBC_SHA) -> % ok - {rsa, des_cbc, sha, no_export}; + {null, null, null}; +%% suite_definition(?TLS_RSA_WITH_NULL_MD5) -> +%% {rsa, null, md5}; +%% suite_definition(?TLS_RSA_WITH_NULL_SHA) -> +%% {rsa, null, sha}; +suite_definition(?TLS_RSA_WITH_RC4_128_MD5) -> + {rsa, rc4_128, md5}; +suite_definition(?TLS_RSA_WITH_RC4_128_SHA) -> + {rsa, rc4_128, sha}; +%% suite_definition(?TLS_RSA_WITH_IDEA_CBC_SHA) -> +%% {rsa, idea_cbc, sha}; +suite_definition(?TLS_RSA_WITH_DES_CBC_SHA) -> + {rsa, des_cbc, sha}; suite_definition(?TLS_RSA_WITH_3DES_EDE_CBC_SHA) -> - {rsa, '3des_ede_cbc', sha, no_export}; -suite_definition(?TLS_DH_DSS_WITH_DES_CBC_SHA) -> - {dh_dss, des_cbc, sha, no_export}; -suite_definition(?TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA) -> - {dh_dss, '3des_ede_cbc', sha, no_export}; -suite_definition(?TLS_DH_RSA_WITH_DES_CBC_SHA) -> - {dh_rsa, des_cbc, sha, no_export}; -suite_definition(?TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA) -> - {dh_rsa, '3des_ede_cbc', sha, no_export}; + {rsa, '3des_ede_cbc', sha}; suite_definition(?TLS_DHE_DSS_WITH_DES_CBC_SHA) -> - {dhe_dss, des_cbc, sha, no_export}; + {dhe_dss, des_cbc, sha}; suite_definition(?TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA) -> - {dhe_dss, '3des_ede_cbc', sha, no_export}; + {dhe_dss, '3des_ede_cbc', sha}; suite_definition(?TLS_DHE_RSA_WITH_DES_CBC_SHA) -> - {dhe_rsa, des_cbc, sha, no_export}; + {dhe_rsa, des_cbc, sha}; suite_definition(?TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA) -> - {dhe_rsa, '3des_ede_cbc', sha, no_export}; -suite_definition(?TLS_DH_anon_WITH_RC4_128_MD5) -> - {dh_anon, rc4_128, md5, no_export}; -suite_definition(?TLS_DH_anon_WITH_DES_CBC_SHA) -> - {dh_anon, des40_cbc, sha, no_export}; -suite_definition(?TLS_DH_anon_WITH_3DES_EDE_CBC_SHA) -> - {dh_anon, '3des_ede_cbc', sha, no_export}; + {dhe_rsa, '3des_ede_cbc', sha}; %%% TSL V1.1 AES suites -suite_definition(?TLS_RSA_WITH_AES_128_CBC_SHA) -> % ok - {rsa, aes_128_cbc, sha, ignore}; -suite_definition(?TLS_DH_DSS_WITH_AES_128_CBC_SHA) -> - {dh_dss, aes_128_cbc, sha, ignore}; -suite_definition(?TLS_DH_RSA_WITH_AES_128_CBC_SHA) -> - {dh_rsa, aes_128_cbc, sha, ignore}; +suite_definition(?TLS_RSA_WITH_AES_128_CBC_SHA) -> + {rsa, aes_128_cbc, sha}; suite_definition(?TLS_DHE_DSS_WITH_AES_128_CBC_SHA) -> - {dhe_dss, aes_128_cbc, sha, ignore}; + {dhe_dss, aes_128_cbc, sha}; suite_definition(?TLS_DHE_RSA_WITH_AES_128_CBC_SHA) -> - {dhe_rsa, aes_128_cbc, sha, ignore}; -suite_definition(?TLS_DH_anon_WITH_AES_128_CBC_SHA) -> - {dh_anon, aes_128_cbc, sha, ignore}; -suite_definition(?TLS_RSA_WITH_AES_256_CBC_SHA) -> % ok - {rsa, aes_256_cbc, sha, ignore}; -suite_definition(?TLS_DH_DSS_WITH_AES_256_CBC_SHA) -> - {dh_dss, aes_256_cbc, sha, ignore}; -suite_definition(?TLS_DH_RSA_WITH_AES_256_CBC_SHA) -> - {dh_rsa, aes_256_cbc, sha, ignore}; + {dhe_rsa, aes_128_cbc, sha}; +suite_definition(?TLS_RSA_WITH_AES_256_CBC_SHA) -> + {rsa, aes_256_cbc, sha}; suite_definition(?TLS_DHE_DSS_WITH_AES_256_CBC_SHA) -> - {dhe_dss, aes_256_cbc, sha, ignore}; + {dhe_dss, aes_256_cbc, sha}; suite_definition(?TLS_DHE_RSA_WITH_AES_256_CBC_SHA) -> - {dhe_rsa, aes_256_cbc, sha, ignore}; + {dhe_rsa, aes_256_cbc, sha}; + +%%% DH-ANON deprecated by TLS spec and not available +%%% by default, but good for testing purposes. +suite_definition(?TLS_DH_anon_WITH_RC4_128_MD5) -> + {dh_anon, rc4_128, md5}; +suite_definition(?TLS_DH_anon_WITH_DES_CBC_SHA) -> + {dh_anon, des_cbc, sha}; +suite_definition(?TLS_DH_anon_WITH_3DES_EDE_CBC_SHA) -> + {dh_anon, '3des_ede_cbc', sha}; +suite_definition(?TLS_DH_anon_WITH_AES_128_CBC_SHA) -> + {dh_anon, aes_128_cbc, sha}; suite_definition(?TLS_DH_anon_WITH_AES_256_CBC_SHA) -> - {dh_anon, aes_256_cbc, sha, ignore}; - -%% TSL V1.1 KRB SUITES -suite_definition(?TLS_KRB5_WITH_DES_CBC_SHA) -> - {krb5, des_cbc, sha, ignore}; -suite_definition(?TLS_KRB5_WITH_3DES_EDE_CBC_SHA) -> - {krb5, '3des_ede_cbc', sha, ignore}; -suite_definition(?TLS_KRB5_WITH_RC4_128_SHA) -> - {krb5, rc4_128, sha, ignore}; -%% suite_definition(?TLS_KRB5_WITH_IDEA_CBC_SHA) -> -%% {krb5, idea_cbc, sha, ignore}; -suite_definition(?TLS_KRB5_WITH_DES_CBC_MD5) -> - {krb5, des_cbc, md5, ignore}; -suite_definition(?TLS_KRB5_WITH_3DES_EDE_CBC_MD5) -> - {krb5, '3des_ede_cbc', md5, ignore}; -suite_definition(?TLS_KRB5_WITH_RC4_128_MD5) -> - {krb5, rc4_128, md5, ignore}; -%% suite_definition(?TLS_KRB5_WITH_IDEA_CBC_MD5) -> -%% {krb5, idea_cbc, md5, ignore}; - -suite_definition(?TLS_RSA_EXPORT1024_WITH_RC4_56_MD5) -> - {rsa, rc4_56, md5, export}; -suite_definition(?TLS_RSA_EXPORT1024_WITH_RC2_CBC_56_MD5) -> - {rsa, rc2_cbc_56, md5, export}; -suite_definition(?TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA) -> - {rsa, des_cbc, sha, export}; -suite_definition(?TLS_DHE_DSS_EXPORT1024_WITH_DES_CBC_SHA) -> - {dhe_dss, des_cbc, sha, export}; -suite_definition(?TLS_RSA_EXPORT1024_WITH_RC4_56_SHA) -> - {rsa, rc4_56, sha, export}; -suite_definition(?TLS_DHE_DSS_EXPORT1024_WITH_RC4_56_SHA) -> - {dhe_dss, rc4_56, sha, export}; -suite_definition(?TLS_DHE_DSS_WITH_RC4_128_SHA) -> - {dhe_dss, rc4_128, sha, export}; - -%% Export suites TLS 1.0 OR SSLv3-only servers. -suite_definition(?TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA) -> - {krb5_export, des40_cbc, sha, export}; -suite_definition(?TLS_KRB5_EXPORT_WITH_RC2_CBC_40_SHA) -> - {krb5_export, rc2_cbc_40, sha, export}; -suite_definition(?TLS_KRB5_EXPORT_WITH_RC4_40_SHA) -> - {krb5_export, des40_cbc, sha, export}; -suite_definition(?TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5) -> - {krb5_export, des40_cbc, md5, export}; -suite_definition(?TLS_KRB5_EXPORT_WITH_RC2_CBC_40_MD5) -> - {krb5_export, rc2_cbc_40, md5, export}; -suite_definition(?TLS_KRB5_EXPORT_WITH_RC4_40_MD5) -> - {krb5_export, rc2_cbc_40, md5, export}; -suite_definition(?TLS_RSA_EXPORT_WITH_RC4_40_MD5) -> % ok - {rsa, rc4_40, md5, export}; -suite_definition(?TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5) -> % ok - {rsa, rc2_cbc_40, md5, export}; -suite_definition(?TLS_RSA_EXPORT_WITH_DES40_CBC_SHA) -> - {rsa, des40_cbc, sha, export}; -suite_definition(?TLS_DH_DSS_EXPORT_WITH_DES40_CBC_SHA) -> - {dh_dss, des40_cbc, sha, export}; -suite_definition(?TLS_DH_RSA_EXPORT_WITH_DES40_CBC_SHA) -> - {dh_rsa, des40_cbc, sha, export}; -suite_definition(?TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA) -> - {dhe_dss, des40_cbc, sha, export}; -suite_definition(?TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA) -> - {dhe_rsa, des40_cbc, sha, export}; -suite_definition(?TLS_DH_anon_EXPORT_WITH_RC4_40_MD5) -> - {dh_anon, rc4_40, md5, export}; -suite_definition(?TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA) -> - {dh_anon, des40_cbc, sha, export}. + {dh_anon, aes_256_cbc, sha}. + +%%-------------------------------------------------------------------- +-spec suite(erl_cipher_suite()) -> cipher_suite(). +%% +%% Description: Return TLS cipher suite definition. +%%-------------------------------------------------------------------- %% TLS v1.1 suites -suite({rsa, null, md5, ignore}) -> - ?TLS_RSA_WITH_NULL_MD5; -suite({rsa, null, sha, ignore}) -> - ?TLS_RSA_WITH_NULL_SHA; -suite({rsa, rc4_128, md5, no_export}) -> +%%suite({rsa, null, md5}) -> +%% ?TLS_RSA_WITH_NULL_MD5; +%%suite({rsa, null, sha}) -> +%% ?TLS_RSA_WITH_NULL_SHA; +suite({rsa, rc4_128, md5}) -> ?TLS_RSA_WITH_RC4_128_MD5; -suite({rsa, rc4_128, sha, no_export}) -> +suite({rsa, rc4_128, sha}) -> ?TLS_RSA_WITH_RC4_128_SHA; -%% suite({rsa, idea_cbc, sha, no_export}) -> +%% suite({rsa, idea_cbc, sha}) -> %% ?TLS_RSA_WITH_IDEA_CBC_SHA; -suite({rsa, des_cbc, sha, no_export}) -> +suite({rsa, des_cbc, sha}) -> ?TLS_RSA_WITH_DES_CBC_SHA; -suite({rsa, '3des_ede_cbc', sha, no_export}) -> +suite({rsa, '3des_ede_cbc', sha}) -> ?TLS_RSA_WITH_3DES_EDE_CBC_SHA; -suite({dh_dss, des_cbc, sha, no_export}) -> - ?TLS_DH_DSS_WITH_DES_CBC_SHA; -suite({dh_dss, '3des_ede_cbc', sha, no_export}) -> - ?TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA; -suite({dh_rsa, des_cbc, sha, no_export}) -> - ?TLS_DH_RSA_WITH_DES_CBC_SHA; -suite({dh_rsa, '3des_ede_cbc', sha, no_export}) -> - ?TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA; -suite({dhe_dss, des_cbc, sha, no_export}) -> +suite({dhe_dss, des_cbc, sha}) -> ?TLS_DHE_DSS_WITH_DES_CBC_SHA; -suite({dhe_dss, '3des_ede_cbc', sha, no_export}) -> +suite({dhe_dss, '3des_ede_cbc', sha}) -> ?TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA; -suite({dhe_rsa, des_cbc, sha, no_export}) -> +suite({dhe_rsa, des_cbc, sha}) -> ?TLS_DHE_RSA_WITH_DES_CBC_SHA; -suite({dhe_rsa, '3des_ede_cbc', sha, no_export}) -> +suite({dhe_rsa, '3des_ede_cbc', sha}) -> ?TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA; -suite({dh_anon, rc4_128, md5, no_export}) -> +suite({dh_anon, rc4_128, md5}) -> ?TLS_DH_anon_WITH_RC4_128_MD5; -suite({dh_anon, des40_cbc, sha, no_export}) -> +suite({dh_anon, des_cbc, sha}) -> ?TLS_DH_anon_WITH_DES_CBC_SHA; -suite({dh_anon, '3des_ede_cbc', sha, no_export}) -> +suite({dh_anon, '3des_ede_cbc', sha}) -> ?TLS_DH_anon_WITH_3DES_EDE_CBC_SHA; %%% TSL V1.1 AES suites -suite({rsa, aes_128_cbc, sha, ignore}) -> +suite({rsa, aes_128_cbc, sha}) -> ?TLS_RSA_WITH_AES_128_CBC_SHA; -suite({dh_dss, aes_128_cbc, sha, ignore}) -> - ?TLS_DH_DSS_WITH_AES_128_CBC_SHA; -suite({dh_rsa, aes_128_cbc, sha, ignore}) -> - ?TLS_DH_RSA_WITH_AES_128_CBC_SHA; -suite({dhe_dss, aes_128_cbc, sha, ignore}) -> +suite({dhe_dss, aes_128_cbc, sha}) -> ?TLS_DHE_DSS_WITH_AES_128_CBC_SHA; -suite({dhe_rsa, aes_128_cbc, sha, ignore}) -> +suite({dhe_rsa, aes_128_cbc, sha}) -> ?TLS_DHE_RSA_WITH_AES_128_CBC_SHA; -suite({dh_anon, aes_128_cbc, sha, ignore}) -> +suite({dh_anon, aes_128_cbc, sha}) -> ?TLS_DH_anon_WITH_AES_128_CBC_SHA; -suite({rsa, aes_256_cbc, sha, ignore}) -> +suite({rsa, aes_256_cbc, sha}) -> ?TLS_RSA_WITH_AES_256_CBC_SHA; -suite({dh_dss, aes_256_cbc, sha, ignore}) -> - ?TLS_DH_DSS_WITH_AES_256_CBC_SHA; -suite({dh_rsa, aes_256_cbc, sha, ignore}) -> - ?TLS_DH_RSA_WITH_AES_256_CBC_SHA; -suite({dhe_dss, aes_256_cbc, sha, ignore}) -> +suite({dhe_dss, aes_256_cbc, sha}) -> ?TLS_DHE_DSS_WITH_AES_256_CBC_SHA; -suite({dhe_rsa, aes_256_cbc, sha, ignore}) -> +suite({dhe_rsa, aes_256_cbc, sha}) -> ?TLS_DHE_RSA_WITH_AES_256_CBC_SHA; -suite({dh_anon, aes_256_cbc, sha, ignore}) -> - ?TLS_DH_anon_WITH_AES_256_CBC_SHA; - -%% TSL V1.1 KRB SUITES -suite({krb5, des_cbc, sha, ignore}) -> - ?TLS_KRB5_WITH_DES_CBC_SHA; -suite({krb5_cbc, '3des_ede_cbc', sha, ignore}) -> - ?TLS_KRB5_WITH_3DES_EDE_CBC_SHA; -suite({krb5, rc4_128, sha, ignore}) -> - ?TLS_KRB5_WITH_RC4_128_SHA; -%% suite({krb5_cbc, idea_cbc, sha, ignore}) -> -%% ?TLS_KRB5_WITH_IDEA_CBC_SHA; -suite({krb5_cbc, md5, ignore}) -> - ?TLS_KRB5_WITH_DES_CBC_MD5; -suite({krb5_ede_cbc, des_cbc, md5, ignore}) -> - ?TLS_KRB5_WITH_3DES_EDE_CBC_MD5; -suite({krb5_128, rc4_128, md5, ignore}) -> - ?TLS_KRB5_WITH_RC4_128_MD5; -%% suite({krb5, idea_cbc, md5, ignore}) -> -%% ?TLS_KRB5_WITH_IDEA_CBC_MD5; - -%% Export suites TLS 1.0 OR SSLv3-only servers. -suite({rsa, rc4_40, md5, export}) -> - ?TLS_RSA_EXPORT_WITH_RC4_40_MD5; -suite({rsa, rc2_cbc_40, md5, export}) -> - ?TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5; -suite({rsa, des40_cbc, sha, export}) -> - ?TLS_RSA_EXPORT_WITH_DES40_CBC_SHA; -suite({rsa, rc4_56, md5, export}) -> - ?TLS_RSA_EXPORT1024_WITH_RC4_56_MD5; -suite({rsa, rc2_cbc_56, md5, export}) -> - ?TLS_RSA_EXPORT1024_WITH_RC2_CBC_56_MD5; -suite({rsa, des_cbc, sha, export}) -> - ?TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA; -suite({dhe_dss, des_cbc, sha, export}) -> - ?TLS_DHE_DSS_EXPORT1024_WITH_DES_CBC_SHA; -suite({rsa, rc4_56, sha, export}) -> - ?TLS_RSA_EXPORT1024_WITH_RC4_56_SHA; -suite({dhe_dss, rc4_56, sha, export}) -> - ?TLS_DHE_DSS_EXPORT1024_WITH_RC4_56_SHA; -suite({dhe_dss, rc4_128, sha, export}) -> - ?TLS_DHE_DSS_WITH_RC4_128_SHA; -suite({krb5_export, des40_cbc, sha, export}) -> - ?TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA; -suite({krb5_export, rc2_cbc_40, sha, export}) -> - ?TLS_KRB5_EXPORT_WITH_RC2_CBC_40_SHA; -suite({krb5_export, rc4_cbc_40, sha, export}) -> - ?TLS_KRB5_EXPORT_WITH_RC4_40_SHA; -suite({krb5_export, des40_cbc, md5, export}) -> - ?TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5; -suite({krb5_export, rc2_cbc_40, md5, export}) -> - ?TLS_KRB5_EXPORT_WITH_RC2_CBC_40_MD5; -suite({krb5_export, rc4_cbc_40, md5, export}) -> - ?TLS_KRB5_EXPORT_WITH_RC4_40_MD5; -suite({rsa_export, rc4_cbc_40, md5, export}) -> - ?TLS_RSA_EXPORT_WITH_RC4_40_MD5; -suite({rsa_export, rc2_cbc_40, md5, export}) -> - ?TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5; -suite({rsa_export, des40_cbc, sha, export}) -> - ?TLS_RSA_EXPORT_WITH_DES40_CBC_SHA; -suite({dh_dss_export, des40_cbc, sha, export}) -> - ?TLS_DH_DSS_EXPORT_WITH_DES40_CBC_SHA; -suite({dh_rsa_export, des40_cbc, sha, export}) -> - ?TLS_DH_RSA_EXPORT_WITH_DES40_CBC_SHA; -suite({dhe_dss_export, des40_cbc, sha, export}) -> - ?TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA; -suite({dhe_rsa_export, des40_cbc, sha, export}) -> - ?TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA; -suite({dh_anon_export, rc4_40, md5, export}) -> - ?TLS_DH_anon_EXPORT_WITH_RC4_40_MD5; -suite({dh_anon_export, des40_cbc, sha, export}) -> - ?TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA. - +suite({dh_anon, aes_256_cbc, sha}) -> + ?TLS_DH_anon_WITH_AES_256_CBC_SHA. +%%-------------------------------------------------------------------- +-spec openssl_suite(openssl_cipher_suite()) -> cipher_suite(). +%% +%% Description: Return TLS cipher suite definition. +%%-------------------------------------------------------------------- %% translate constants <-> openssl-strings -%% TODO: Is there a pattern in the nameing -%% that is useable to make a nicer function defention? - openssl_suite("DHE-RSA-AES256-SHA") -> ?TLS_DHE_RSA_WITH_AES_256_CBC_SHA; openssl_suite("DHE-DSS-AES256-SHA") -> @@ -514,46 +336,21 @@ openssl_suite("DHE-DSS-AES128-SHA") -> ?TLS_DHE_DSS_WITH_AES_128_CBC_SHA; openssl_suite("AES128-SHA") -> ?TLS_RSA_WITH_AES_128_CBC_SHA; -%% TODO: Do we want to support this? -%% openssl_suite("DHE-DSS-RC4-SHA") -> -%% ?TLS_DHE_DSS_WITH_RC4_128_SHA; %%openssl_suite("IDEA-CBC-SHA") -> %% ?TLS_RSA_WITH_IDEA_CBC_SHA; openssl_suite("RC4-SHA") -> ?TLS_RSA_WITH_RC4_128_SHA; openssl_suite("RC4-MD5") -> ?TLS_RSA_WITH_RC4_128_MD5; -%% TODO: Do we want to support this? -openssl_suite("EXP1024-RC4-MD5") -> - ?TLS_RSA_EXPORT1024_WITH_RC4_56_MD5; -openssl_suite("EXP1024-RC2-CBC-MD5") -> - ?TLS_RSA_EXPORT1024_WITH_RC2_CBC_56_MD5; -openssl_suite("EXP1024-DES-CBC-SHA") -> - ?TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA; -openssl_suite("EXP1024-DHE-DSS-DES-CBC-SHA") -> - ?TLS_DHE_DSS_EXPORT1024_WITH_DES_CBC_SHA; -openssl_suite("EXP1024-RC4-SHA") -> - ?TLS_RSA_EXPORT1024_WITH_RC4_56_SHA; -openssl_suite("EXP1024-DHE-DSS-RC4-SHA") -> - ?TLS_DHE_DSS_EXPORT1024_WITH_RC4_56_SHA; -openssl_suite("DHE-DSS-RC4-SHA") -> - ?TLS_DHE_DSS_WITH_RC4_128_SHA; - openssl_suite("EDH-RSA-DES-CBC-SHA") -> ?TLS_DHE_RSA_WITH_DES_CBC_SHA; openssl_suite("DES-CBC-SHA") -> - ?TLS_RSA_WITH_DES_CBC_SHA; -openssl_suite("EXP-EDH-RSA-DES-CBC-SHA") -> - ?TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA; -openssl_suite("EXP-EDH-DSS-DES-CBC-SHA") -> - ?TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA; -openssl_suite("EXP-DES-CBC-SHA") -> - ?TLS_RSA_EXPORT_WITH_DES40_CBC_SHA; -openssl_suite("EXP-RC2-CBC-MD5") -> - ?TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5; -openssl_suite("EXP-RC4-MD5") -> - ?TLS_RSA_EXPORT_WITH_RC4_40_MD5. - + ?TLS_RSA_WITH_DES_CBC_SHA. +%%-------------------------------------------------------------------- +-spec openssl_suite_name(cipher_suite()) -> openssl_cipher_suite(). +%% +%% Description: Return openssl cipher suite name. +%%------------------------------------------------------------------- openssl_suite_name(?TLS_DHE_RSA_WITH_AES_256_CBC_SHA) -> "DHE-RSA-AES256-SHA"; openssl_suite_name(?TLS_DHE_DSS_WITH_AES_256_CBC_SHA) -> @@ -582,37 +379,28 @@ openssl_suite_name(?TLS_DHE_RSA_WITH_DES_CBC_SHA) -> "EDH-RSA-DES-CBC-SHA"; openssl_suite_name(?TLS_RSA_WITH_DES_CBC_SHA) -> "DES-CBC-SHA"; -openssl_suite_name(?TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA) -> - "EXP-EDH-RSA-DES-CBC-SHA"; -openssl_suite_name(?TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA) -> - "EXP-EDH-DSS-DES-CBC-SHA"; -openssl_suite_name(?TLS_RSA_EXPORT_WITH_DES40_CBC_SHA) -> - "EXP-DES-CBC-SHA"; -openssl_suite_name(?TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5) -> - "EXP-RC2-CBC-MD5"; -openssl_suite_name(?TLS_RSA_EXPORT_WITH_RC4_40_MD5) -> - "EXP-RC4-MD5"; - -openssl_suite_name(?TLS_RSA_EXPORT1024_WITH_RC4_56_MD5) -> - "EXP1024-RC4-MD5"; -openssl_suite_name(?TLS_RSA_EXPORT1024_WITH_RC2_CBC_56_MD5) -> - "EXP1024-RC2-CBC-MD5"; -openssl_suite_name(?TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA) -> - "EXP1024-DES-CBC-SHA"; -openssl_suite_name(?TLS_DHE_DSS_EXPORT1024_WITH_DES_CBC_SHA) -> - "EXP1024-DHE-DSS-DES-CBC-SHA"; -openssl_suite_name(?TLS_RSA_EXPORT1024_WITH_RC4_56_SHA) -> - "EXP1024-RC4-SHA"; -openssl_suite_name(?TLS_DHE_DSS_EXPORT1024_WITH_RC4_56_SHA) -> - "EXP1024-DHE-DSS-RC4-SHA"; -openssl_suite_name(?TLS_DHE_DSS_WITH_RC4_128_SHA) -> - "DHE-DSS-RC4-SHA"; - %% No oppenssl name openssl_suite_name(Cipher) -> suite_definition(Cipher). %%-------------------------------------------------------------------- +-spec filter(undefined | binary(), [cipher_suite()]) -> [cipher_suite()]. +%% +%% Description: . +%%------------------------------------------------------------------- +filter(undefined, Ciphers) -> + Ciphers; +filter(DerCert, Ciphers) -> + OtpCert = public_key:pkix_decode_cert(DerCert, otp), + SigAlg = OtpCert#'OTPCertificate'.signatureAlgorithm, + case ssl_certificate:signature_type(SigAlg#'SignatureAlgorithm'.algorithm) of + rsa -> + filter_rsa(OtpCert, Ciphers -- dsa_signed_suites()); + dsa -> + Ciphers -- rsa_signed_suites() + end. + +%%-------------------------------------------------------------------- %%% Internal functions %%-------------------------------------------------------------------- @@ -621,15 +409,8 @@ bulk_cipher_algorithm(null) -> %% Not supported yet %% bulk_cipher_algorithm(idea_cbc) -> %% ?IDEA; -bulk_cipher_algorithm(Cipher) when Cipher == rc2_cbc_40; - Cipher == rc2_cbc_56 -> - ?RC2; -bulk_cipher_algorithm(Cipher) when Cipher == rc4_40; - Cipher == rc4_56; - Cipher == rc4_128 -> +bulk_cipher_algorithm(rc4_128) -> ?RC4; -bulk_cipher_algorithm(des40_cbc) -> - ?DES40; bulk_cipher_algorithm(des_cbc) -> ?DES; bulk_cipher_algorithm('3des_ede_cbc') -> @@ -639,15 +420,10 @@ bulk_cipher_algorithm(Cipher) when Cipher == aes_128_cbc; ?AES. type(Cipher) when Cipher == null; - Cipher == rc4_40; - Cipher == rc4_56; Cipher == rc4_128 -> ?STREAM; type(Cipher) when Cipher == idea_cbc; - Cipher == rc2_cbc_40; - Cipher == rc2_cbc_56; - Cipher == des40_cbc; Cipher == des_cbc; Cipher == '3des_ede_cbc'; Cipher == aes_128_cbc; @@ -659,13 +435,6 @@ key_material(null) -> key_material(Cipher) when Cipher == idea_cbc; Cipher == rc4_128 -> 16; -key_material(Cipher) when Cipher == rc2_cbc_56; - Cipher == rc4_56 -> - 7; -key_material(Cipher) when Cipher == rc2_cbc_40; - Cipher == rc4_40; - Cipher == des40_cbc -> - 5; key_material(des_cbc) -> 8; key_material('3des_ede_cbc') -> @@ -678,14 +447,9 @@ key_material(aes_256_cbc) -> expanded_key_material(null) -> 0; expanded_key_material(Cipher) when Cipher == idea_cbc; - Cipher == rc2_cbc_40; - Cipher == rc2_cbc_56; - Cipher == rc4_40; - Cipher == rc4_56; Cipher == rc4_128 -> 16; -expanded_key_material(Cipher) when Cipher == des_cbc; - Cipher == des40_cbc -> +expanded_key_material(Cipher) when Cipher == des_cbc -> 8; expanded_key_material('3des_ede_cbc') -> 24; @@ -696,13 +460,7 @@ expanded_key_material(Cipher) when Cipher == aes_128_cbc; effective_key_bits(null) -> 0; -effective_key_bits(Cipher) when Cipher == rc2_cbc_40; - Cipher == rc4_40; - Cipher == des40_cbc -> - 40; -effective_key_bits(Cipher) when Cipher == rc2_cbc_56; - Cipher == rc4_56; - Cipher == des_cbc -> +effective_key_bits(des_cbc) -> 56; effective_key_bits(Cipher) when Cipher == idea_cbc; Cipher == rc4_128; @@ -714,17 +472,12 @@ effective_key_bits(aes_256_cbc) -> 256. iv_size(Cipher) when Cipher == null; - Cipher == rc4_40; - Cipher == rc4_56; Cipher == rc4_128 -> 0; iv_size(Cipher) -> block_size(Cipher). block_size(Cipher) when Cipher == idea_cbc; - Cipher == rc2_cbc_40; - Cipher == rc2_cbc_56; - Cipher == des40_cbc; Cipher == des_cbc; Cipher == '3des_ede_cbc' -> 8; @@ -763,9 +516,18 @@ generic_stream_cipher_from_bin(T, HashSz) -> #generic_stream_cipher{content=Content, mac=Mac}. -check_padding(_GBC) -> - ok. - +is_correct_padding(_, {3, 0}) -> + true; +%% For interoperability reasons we do not check the padding in TLS 1.0 as it +%% is not strictly required and breaks interopability with for instance +%% Google. +is_correct_padding(_, {3, 1}) -> + true; +%% Padding must be check in TLS 1.1 and after +is_correct_padding(#generic_block_cipher{padding_length = Len, padding = Padding}, _) -> + list_to_binary(lists:duplicate(Len, Len)) == Padding. + + get_padding(Length, BlockSize) -> get_padding_aux(BlockSize, Length rem BlockSize). @@ -782,3 +544,51 @@ next_iv(Bin, IV) -> <<_:FirstPart/binary, NextIV:IVSz/binary>> = Bin, NextIV. +rsa_signed_suites() -> + dhe_rsa_suites() ++ rsa_suites(). + +dhe_rsa_suites() -> + [?TLS_DHE_RSA_WITH_AES_256_CBC_SHA, + ?TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA, + ?TLS_DHE_RSA_WITH_AES_128_CBC_SHA, + ?TLS_DHE_RSA_WITH_DES_CBC_SHA]. + +rsa_suites() -> + [?TLS_RSA_WITH_AES_256_CBC_SHA, + ?TLS_RSA_WITH_3DES_EDE_CBC_SHA, + ?TLS_RSA_WITH_AES_128_CBC_SHA, + %%?TLS_RSA_WITH_IDEA_CBC_SHA, + ?TLS_RSA_WITH_RC4_128_SHA, + ?TLS_RSA_WITH_RC4_128_MD5, + ?TLS_RSA_WITH_DES_CBC_SHA]. + +dsa_signed_suites() -> + dhe_dss_suites(). + +dhe_dss_suites() -> + [?TLS_DHE_DSS_WITH_AES_256_CBC_SHA, + ?TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA, + ?TLS_DHE_DSS_WITH_AES_128_CBC_SHA, + ?TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA]. + +filter_rsa(OtpCert, RsaCiphers) -> + 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 -> + RsaCiphers; + #'Extension'{extnValue = KeyUse} -> + Result = filter_rsa_suites(keyEncipherment, + KeyUse, RsaCiphers, rsa_suites()), + filter_rsa_suites(digitalSignature, + KeyUse, Result, dhe_rsa_suites()) + end. + +filter_rsa_suites(Use, KeyUse, CipherSuits, RsaSuites) -> + case ssl_certificate:is_valid_key_usage(KeyUse, Use) of + true -> + CipherSuits; + false -> + CipherSuits -- RsaSuites + end. |