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Work-around against public_key incompatibility introduced in OTP21
The commit introduced the incompatility is
304dd8f81e
Thanks to Stu Tomlinson for spotting the issue.
Fixes #2488
This commit is contained in:
Evgeniy Khramtsov
parent
644873dae9
commit
71ae7e9fd9
@ -49,9 +49,10 @@
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-type bad_cert_reason() :: cert_expired | invalid_issuer | invalid_signature |
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name_not_permitted | missing_basic_constraint |
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invalid_key_usage | selfsigned_peer | unknown_sig_algo |
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unknown_ca | missing_priv_key.
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-type bad_cert() :: {bad_cert, bad_cert_reason()}.
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-type cert_error() :: not_cert | not_der | not_pem | encrypted.
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unknown_ca | missing_priv_key | unknown_key_algo |
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unknown_key_type | encrypted | not_der | not_cert |
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not_pem.
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-type cert_error() :: {bad_cert, bad_cert_reason()}.
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-export_type([cert_error/0]).
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-define(CA_CACHE, ca_cache).
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@ -76,13 +77,13 @@ route_registered(Route) ->
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gen_server:call(?MODULE, {route_registered, Route}).
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-spec format_error(cert_error() | file:posix()) -> string().
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format_error(not_cert) ->
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format_error({bad_cert, not_cert}) ->
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"no PEM encoded certificates found";
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format_error(not_pem) ->
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format_error({bad_cert, not_pem}) ->
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"failed to decode from PEM format";
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format_error(not_der) ->
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format_error({bad_cert, not_der}) ->
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"failed to decode from DER format";
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format_error(encrypted) ->
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format_error({bad_cert, encrypted}) ->
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"encrypted certificate";
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format_error({bad_cert, cert_expired}) ->
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"certificate is no longer valid as its expiration date has passed";
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@ -103,6 +104,10 @@ format_error({bad_cert, selfsigned_peer}) ->
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"self-signed certificate";
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format_error({bad_cert, unknown_sig_algo}) ->
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"certificate is signed using unknown algorithm";
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format_error({bad_cert, unknown_key_algo}) ->
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"unknown private key algorithm";
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format_error({bad_cert, unknown_key_type}) ->
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"private key is of unknown type";
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format_error({bad_cert, unknown_ca}) ->
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"certificate is signed by unknown CA";
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format_error({bad_cert, missing_priv_key}) ->
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@ -330,7 +335,7 @@ get_certfiles_from_config_options(_State) ->
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[iolist_to_binary(P) || P <- lists:usort(Local ++ Global)].
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-spec add_certfiles(state()) -> {ok, state()} |
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{error, bad_cert() | file:posix()}.
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{error, cert_error() | file:posix()}.
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add_certfiles(State) ->
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?DEBUG("Reading certificates", []),
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Paths = get_certfiles_from_config_options(State),
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@ -345,7 +350,7 @@ add_certfiles(State) ->
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end.
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-spec add_certfiles(binary(), state()) -> {ok, state()} |
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{error, bad_cert() | file:posix()}.
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{error, cert_error() | file:posix()}.
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add_certfiles(Host, State) ->
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State1 = lists:foldl(
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fun(Opt, AccState) ->
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@ -388,7 +393,7 @@ add_certfile(Path, State) ->
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end
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end.
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-spec build_chain_and_check(state()) -> ok | {error, bad_cert() | file:posix()}.
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-spec build_chain_and_check(state()) -> ok | {error, cert_error() | file:posix()}.
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build_chain_and_check(State) ->
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CertPaths = get_cert_paths(maps:keys(State#state.certs), State#state.graph),
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case match_cert_keys(CertPaths, State#state.keys) of
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@ -515,55 +520,66 @@ pem_decode(Data) ->
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(_) -> false
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end, Objects) of
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{[], []} ->
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{error, not_cert};
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{error, {bad_cert, not_cert}};
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{Certs, PrivKeys} ->
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{ok, Certs, PrivKeys}
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end
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end
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catch _:_ ->
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{error, not_pem}
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catch E:R ->
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St = erlang:get_stacktrace(),
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?DEBUG("PEM decoding stacktrace: ~p", [{E, {R, St}}]),
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{error, {bad_cert, not_pem}}
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end.
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-spec decode_certs([public_key:pem_entry()]) -> {[cert()], [priv_key()]} |
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{error, not_der | encrypted}.
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-spec decode_certs([public_key:pem_entry()]) -> [cert() | priv_key()] |
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{error, cert_error()}.
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decode_certs(PemEntries) ->
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try lists:foldr(
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fun(_, {error, _} = Err) ->
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Err;
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({_, _, Flag}, _) when Flag /= not_encrypted ->
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{error, encrypted};
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({'Certificate', Der, _}, Acc) ->
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[public_key:pkix_decode_cert(Der, otp)|Acc];
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({'PrivateKeyInfo', Der, not_encrypted}, Acc) ->
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#'PrivateKeyInfo'{privateKeyAlgorithm =
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#'PrivateKeyInfo_privateKeyAlgorithm'{
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algorithm = Algo},
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privateKey = Key} =
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public_key:der_decode('PrivateKeyInfo', Der),
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case Algo of
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?'rsaEncryption' ->
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[public_key:der_decode(
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'RSAPrivateKey', iolist_to_binary(Key))|Acc];
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?'id-dsa' ->
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[public_key:der_decode(
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'DSAPrivateKey', iolist_to_binary(Key))|Acc];
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?'id-ecPublicKey' ->
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[public_key:der_decode(
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'ECPrivateKey', iolist_to_binary(Key))|Acc];
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_ ->
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Acc
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end;
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({Tag, Der, _}, Acc) when Tag == 'RSAPrivateKey';
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Tag == 'DSAPrivateKey';
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Tag == 'ECPrivateKey' ->
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[public_key:der_decode(Tag, Der)|Acc];
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(_, Acc) ->
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Acc
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end, [], PemEntries)
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catch _:_ ->
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{error, not_der}
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try lists:flatmap(
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fun({Tag, Der, Flag}) ->
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decode_cert(Tag, Der, Flag)
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end, PemEntries)
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catch _:{bad_cert, _} = Err ->
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{error, Err};
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E:R ->
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St = erlang:get_stacktrace(),
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?DEBUG("DER decoding stacktrace: ~p", [{E, {R, St}}]),
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{error, {bad_cert, not_der}}
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end.
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-spec decode_cert(atom(), binary(), atom()) -> [cert() | priv_key()].
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decode_cert(_, _, Flag) when Flag /= not_encrypted ->
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erlang:error({bad_cert, encrypted});
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decode_cert('Certificate', Der, _) ->
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[public_key:pkix_decode_cert(Der, otp)];
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decode_cert('PrivateKeyInfo', Der, not_encrypted) ->
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case public_key:der_decode('PrivateKeyInfo', Der) of
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#'PrivateKeyInfo'{privateKeyAlgorithm =
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#'PrivateKeyInfo_privateKeyAlgorithm'{
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algorithm = Algo},
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privateKey = Key} ->
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KeyBin = iolist_to_binary(Key),
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case Algo of
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?'rsaEncryption' ->
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[public_key:der_decode('RSAPrivateKey', KeyBin)];
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?'id-dsa' ->
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[public_key:der_decode('DSAPrivateKey', KeyBin)];
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?'id-ecPublicKey' ->
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[public_key:der_decode('ECPrivateKey', KeyBin)];
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_ ->
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erlang:error({bad_cert, unknown_key_algo})
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end;
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#'RSAPrivateKey'{} = Key -> [Key];
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#'DSAPrivateKey'{} = Key -> [Key];
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#'ECPrivateKey'{} = Key -> [Key];
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_ -> erlang:error({bad_cert, unknown_key_type})
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end;
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decode_cert(Tag, Der, _) when Tag == 'RSAPrivateKey';
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Tag == 'DSAPrivateKey';
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Tag == 'ECPrivateKey' ->
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[public_key:der_decode(Tag, Der)];
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decode_cert(_, _, _) ->
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[].
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-spec validate([{path, [cert()]}], state()) -> [cert()].
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validate(Paths, #state{validate = true} = State) ->
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?DEBUG("Validating certificates", []),
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@ -604,7 +620,7 @@ validate(Paths, #state{validate = true} = State) ->
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validate(_, _) ->
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[].
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-spec validate_path([cert()], dict:dict()) -> ok | {error, cert(), bad_cert()}.
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-spec validate_path([cert()], dict:dict()) -> ok | {error, cert(), cert_error()}.
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validate_path([Cert|_] = Certs, Cache) ->
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case find_local_issuer(Cert, Cache) of
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{ok, IssuerCert} ->
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