diff options
Diffstat (limited to 'lib/ssl/src/ssl_certificate.erl')
| -rw-r--r-- | lib/ssl/src/ssl_certificate.erl | 196 |
1 files changed, 130 insertions, 66 deletions
diff --git a/lib/ssl/src/ssl_certificate.erl b/lib/ssl/src/ssl_certificate.erl index b186a1015a..3ec3f50e05 100644 --- a/lib/ssl/src/ssl_certificate.erl +++ b/lib/ssl/src/ssl_certificate.erl @@ -1,18 +1,19 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 2007-2013. All Rights Reserved. +%% Copyright Ericsson AB 2007-2016 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/. +%% Licensed under the Apache License, Version 2.0 (the "License"); +%% you may not use this file except in compliance with the License. +%% You may obtain a copy of the License at %% -%% 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. +%% http://www.apache.org/licenses/LICENSE-2.0 +%% +%% Unless required by applicable law or agreed to in writing, software +%% distributed under the License is distributed on an "AS IS" BASIS, +%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +%% See the License for the specific language governing permissions and +%% limitations under the License. %% %% %CopyrightEnd% %% @@ -30,10 +31,11 @@ -include("ssl_internal.hrl"). -include_lib("public_key/include/public_key.hrl"). --export([trusted_cert_and_path/3, +-export([trusted_cert_and_path/4, certificate_chain/3, file_to_certificats/2, - validate_extension/3, + file_to_crls/2, + validate/3, is_valid_extkey_usage/2, is_valid_key_usage/2, select_extension/2, @@ -46,62 +48,56 @@ %%==================================================================== %%-------------------------------------------------------------------- --spec trusted_cert_and_path([der_cert()], db_handle(), certdb_ref()) -> +-spec trusted_cert_and_path([der_cert()], db_handle(), certdb_ref(), fun()) -> {der_cert() | unknown_ca, [der_cert()]}. %% %% Description: Extracts the root cert (if not presents tries to %% look it up, if not found {bad_cert, unknown_ca} will be added verification %% errors. Returns {RootCert, Path, VerifyErrors} %%-------------------------------------------------------------------- -trusted_cert_and_path(CertChain, CertDbHandle, CertDbRef) -> - Path = [Cert | _] = lists:reverse(CertChain), - OtpCert = public_key:pkix_decode_cert(Cert, otp), +trusted_cert_and_path(CertChain, CertDbHandle, CertDbRef, PartialChainHandler) -> + Path = [BinCert | _] = lists:reverse(CertChain), + OtpCert = public_key:pkix_decode_cert(BinCert, otp), SignedAndIssuerID = case public_key:pkix_is_self_signed(OtpCert) of true -> {ok, IssuerId} = public_key:pkix_issuer_id(OtpCert, self), {self, IssuerId}; false -> - case public_key:pkix_issuer_id(OtpCert, other) of - {ok, IssuerId} -> - {other, IssuerId}; - {error, issuer_not_found} -> - case find_issuer(OtpCert, CertDbHandle) of - {ok, IssuerId} -> - {other, IssuerId}; - Other -> - Other - end - end + other_issuer(OtpCert, BinCert, CertDbHandle) end, case SignedAndIssuerID of {error, issuer_not_found} -> %% The root CA was not sent and can not be found. - {unknown_ca, Path}; + handle_incomplete_chain(Path, PartialChainHandler); {self, _} when length(Path) == 1 -> {selfsigned_peer, Path}; {_ ,{SerialNr, Issuer}} -> case ssl_manager:lookup_trusted_cert(CertDbHandle, CertDbRef, SerialNr, Issuer) of - {ok, {BinCert,_}} -> - {BinCert, Path}; + {ok, Trusted} -> + %% Trusted must be selfsigned or it is an incomplete chain + handle_path(Trusted, Path, PartialChainHandler); _ -> %% Root CA could not be verified - {unknown_ca, Path} + handle_incomplete_chain(Path, PartialChainHandler) end end. %%-------------------------------------------------------------------- --spec certificate_chain(undefined | binary(), db_handle(), certdb_ref()) -> - {error, no_cert} | {ok, [der_cert()]}. +-spec certificate_chain(undefined | binary() | #'OTPCertificate'{} , db_handle(), certdb_ref()) -> + {error, no_cert} | {ok, #'OTPCertificate'{} | undefined, [der_cert()]}. %% %% Description: Return the certificate chain to send to peer. %%-------------------------------------------------------------------- certificate_chain(undefined, _, _) -> {error, no_cert}; -certificate_chain(OwnCert, CertDbHandle, CertsDbRef) -> +certificate_chain(OwnCert, CertDbHandle, CertsDbRef) when is_binary(OwnCert) -> ErlCert = public_key:pkix_decode_cert(OwnCert, otp), - certificate_chain(ErlCert, OwnCert, CertDbHandle, CertsDbRef, [OwnCert]). + certificate_chain(ErlCert, OwnCert, CertDbHandle, CertsDbRef, [OwnCert]); +certificate_chain(OwnCert, CertDbHandle, CertsDbRef) -> + DerCert = public_key:pkix_encode('OTPCertificate', OwnCert, otp), + certificate_chain(OwnCert, DerCert, CertDbHandle, CertsDbRef, [DerCert]). %%-------------------------------------------------------------------- -spec file_to_certificats(binary(), term()) -> [der_cert()]. %% @@ -110,29 +106,39 @@ certificate_chain(OwnCert, CertDbHandle, CertsDbRef) -> file_to_certificats(File, DbHandle) -> {ok, List} = ssl_manager:cache_pem_file(File, DbHandle), [Bin || {'Certificate', Bin, not_encrypted} <- List]. + %%-------------------------------------------------------------------- --spec validate_extension(term(), {extension, #'Extension'{}} | {bad_cert, atom()} | valid, - term()) -> {valid, term()} | - {fail, tuple()} | - {unknown, term()}. +-spec file_to_crls(binary(), term()) -> [der_cert()]. +%% +%% Description: Return list of DER encoded certificates. +%%-------------------------------------------------------------------- +file_to_crls(File, DbHandle) -> + {ok, List} = ssl_manager:cache_pem_file(File, DbHandle), + [Bin || {'CertificateList', Bin, not_encrypted} <- List]. + +%%-------------------------------------------------------------------- +-spec validate(term(), {extension, #'Extension'{}} | {bad_cert, atom()} | valid, + term()) -> {valid, term()} | + {fail, tuple()} | + {unknown, term()}. %% %% Description: Validates ssl/tls specific extensions %%-------------------------------------------------------------------- -validate_extension(_,{extension, #'Extension'{extnID = ?'id-ce-extKeyUsage', - extnValue = KeyUse}}, Role) -> +validate(_,{extension, #'Extension'{extnID = ?'id-ce-extKeyUsage', + extnValue = KeyUse}}, {Role, _,_, _, _}) -> case is_valid_extkey_usage(KeyUse, Role) of true -> {valid, Role}; false -> {fail, {bad_cert, invalid_ext_key_usage}} end; -validate_extension(_, {bad_cert, _} = Reason, _) -> - {fail, Reason}; -validate_extension(_, {extension, _}, Role) -> +validate(_, {extension, _}, Role) -> {unknown, Role}; -validate_extension(_, valid, Role) -> +validate(_, {bad_cert, _} = Reason, _) -> + {fail, Reason}; +validate(_, valid, Role) -> {valid, Role}; -validate_extension(_, valid_peer, Role) -> +validate(_, valid_peer, Role) -> {valid, Role}. %%-------------------------------------------------------------------- @@ -181,7 +187,7 @@ public_key_type(?'id-ecPublicKey') -> %%-------------------------------------------------------------------- %%% Internal functions %%-------------------------------------------------------------------- -certificate_chain(OtpCert, _Cert, CertDbHandle, CertsDbRef, Chain) -> +certificate_chain(OtpCert, BinCert, CertDbHandle, CertsDbRef, Chain) -> IssuerAndSelfSigned = case public_key:pkix_is_self_signed(OtpCert) of true -> @@ -194,7 +200,7 @@ certificate_chain(OtpCert, _Cert, CertDbHandle, CertsDbRef, Chain) -> {_, true = SelfSigned} -> certificate_chain(CertDbHandle, CertsDbRef, Chain, ignore, ignore, SelfSigned); {{error, issuer_not_found}, SelfSigned} -> - case find_issuer(OtpCert, CertDbHandle) of + case find_issuer(OtpCert, BinCert, CertDbHandle) of {ok, {SerialNr, Issuer}} -> certificate_chain(CertDbHandle, CertsDbRef, Chain, SerialNr, Issuer, SelfSigned); @@ -203,14 +209,14 @@ certificate_chain(OtpCert, _Cert, CertDbHandle, CertsDbRef, Chain) -> %% certificate. The verification of the %% cert chain will fail if guess is %% incorrect. - {ok, lists:reverse(Chain)} + {ok, undefined, lists:reverse(Chain)} end; {{ok, {SerialNr, Issuer}}, SelfSigned} -> certificate_chain(CertDbHandle, CertsDbRef, Chain, SerialNr, Issuer, SelfSigned) end. -certificate_chain(_,_, Chain, _SerialNr, _Issuer, true) -> - {ok, lists:reverse(Chain)}; +certificate_chain(_, _, [RootCert | _] = Chain, _, _, true) -> + {ok, RootCert, lists:reverse(Chain)}; certificate_chain(CertDbHandle, CertsDbRef, Chain, SerialNr, Issuer, _SelfSigned) -> case ssl_manager:lookup_trusted_cert(CertDbHandle, CertsDbRef, @@ -222,23 +228,27 @@ certificate_chain(CertDbHandle, CertsDbRef, Chain, SerialNr, Issuer, _SelfSigned _ -> %% The trusted cert may be obmitted from the chain as the %% counter part needs to have it anyway to be able to - %% verify it. This will be the normal case for servers - %% that does not verify the clients and hence have not - %% specified the cacertfile. - {ok, lists:reverse(Chain)} + %% verify it. + {ok, undefined, lists:reverse(Chain)} end. -find_issuer(OtpCert, CertDbHandle) -> - IsIssuerFun = fun({_Key, {_Der, #'OTPCertificate'{} = ErlCertCandidate}}, Acc) -> - case public_key:pkix_is_issuer(OtpCert, ErlCertCandidate) of - true -> - throw(public_key:pkix_issuer_id(ErlCertCandidate, self)); - false -> - Acc - end; - (_, Acc) -> - Acc - end, +find_issuer(OtpCert, BinCert, CertDbHandle) -> + IsIssuerFun = + fun({_Key, {_Der, #'OTPCertificate'{} = ErlCertCandidate}}, Acc) -> + case public_key:pkix_is_issuer(OtpCert, ErlCertCandidate) of + true -> + case verify_cert_signer(BinCert, ErlCertCandidate#'OTPCertificate'.tbsCertificate) of + true -> + throw(public_key:pkix_issuer_id(ErlCertCandidate, self)); + false -> + Acc + end; + false -> + Acc + end; + (_, Acc) -> + Acc + end, try ssl_pkix_db:foldl(IsIssuerFun, issuer_not_found, CertDbHandle) of issuer_not_found -> @@ -254,3 +264,57 @@ is_valid_extkey_usage(KeyUse, client) -> is_valid_extkey_usage(KeyUse, server) -> %% Server wants to verify client is_valid_key_usage(KeyUse, ?'id-kp-clientAuth'). + +verify_cert_signer(BinCert, SignerTBSCert) -> + PublicKey = public_key(SignerTBSCert#'OTPTBSCertificate'.subjectPublicKeyInfo), + public_key:pkix_verify(BinCert, PublicKey). + +public_key(#'OTPSubjectPublicKeyInfo'{algorithm = #'PublicKeyAlgorithm'{algorithm = ?'id-ecPublicKey', + parameters = Params}, + subjectPublicKey = Point}) -> + {Point, Params}; +public_key(#'OTPSubjectPublicKeyInfo'{algorithm = #'PublicKeyAlgorithm'{algorithm = ?'rsaEncryption'}, + subjectPublicKey = Key}) -> + Key; +public_key(#'OTPSubjectPublicKeyInfo'{algorithm = #'PublicKeyAlgorithm'{algorithm = ?'id-dsa', + parameters = {params, Params}}, + subjectPublicKey = Key}) -> + {Key, Params}. + +other_issuer(OtpCert, BinCert, CertDbHandle) -> + case public_key:pkix_issuer_id(OtpCert, other) of + {ok, IssuerId} -> + {other, IssuerId}; + {error, issuer_not_found} -> + case find_issuer(OtpCert, BinCert, CertDbHandle) of + {ok, IssuerId} -> + {other, IssuerId}; + Other -> + Other + end + end. + +handle_path({BinCert, OTPCert}, Path, PartialChainHandler) -> + case public_key:pkix_is_self_signed(OTPCert) of + true -> + {BinCert, lists:delete(BinCert, Path)}; + false -> + handle_incomplete_chain(Path, PartialChainHandler) + end. + +handle_incomplete_chain(Chain, Fun) -> + case catch Fun(Chain) of + {trusted_ca, DerCert} -> + new_trusteded_chain(DerCert, Chain); + unknown_ca = Error -> + {Error, Chain}; + _ -> + {unknown_ca, Chain} + end. + +new_trusteded_chain(DerCert, [DerCert | Chain]) -> + {DerCert, Chain}; +new_trusteded_chain(DerCert, [_ | Rest]) -> + new_trusteded_chain(DerCert, Rest); +new_trusteded_chain(_, []) -> + unknown_ca. |