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-rw-r--r--lib/public_key/src/public_key.erl164
1 files changed, 164 insertions, 0 deletions
diff --git a/lib/public_key/src/public_key.erl b/lib/public_key/src/public_key.erl
index 05c09f8996..402f514803 100644
--- a/lib/public_key/src/public_key.erl
+++ b/lib/public_key/src/public_key.erl
@@ -48,6 +48,7 @@
pkix_issuer_id/2,
pkix_normalize_name/1,
pkix_path_validation/3,
+ pkix_verify_hostname/2, pkix_verify_hostname/3,
ssh_decode/2, ssh_encode/2,
ssh_hostkey_fingerprint/1, ssh_hostkey_fingerprint/2,
ssh_curvename2oid/1, oid2ssh_curvename/1,
@@ -763,6 +764,76 @@ pkix_crls_validate(OtpCert, DPAndCRLs0, Options) ->
pkix_crls_validate(OtpCert, DPAndCRLs, DPAndCRLs,
Options, pubkey_crl:init_revokation_state()).
+%--------------------------------------------------------------------
+-spec pkix_verify_hostname(Cert :: #'OTPCertificate'{} | binary(),
+ ReferenceIDs :: [{uri_id | dns_id | oid(), string()}]) -> boolean().
+
+-spec pkix_verify_hostname(Cert :: #'OTPCertificate'{} | binary(),
+ ReferenceIDs :: [{uri_id | dns_id | oid(), string()}],
+ Options :: proplists:proplist()) -> boolean().
+
+%% Description: Validates a hostname to RFC 6125
+%%--------------------------------------------------------------------
+pkix_verify_hostname(Cert, ReferenceIDs) ->
+ pkix_verify_hostname(Cert, ReferenceIDs, []).
+
+pkix_verify_hostname(BinCert, ReferenceIDs, Options) when is_binary(BinCert) ->
+ pkix_verify_hostname(pkix_decode_cert(BinCert,otp), ReferenceIDs, Options);
+
+pkix_verify_hostname(Cert = #'OTPCertificate'{tbsCertificate = TbsCert}, ReferenceIDs0, Opts) ->
+ MatchFun = proplists:get_value(match_fun, Opts, undefined),
+ FailCB = proplists:get_value(fail_callback, Opts, fun(_Cert) -> false end),
+ FqdnFun = proplists:get_value(fqdn_fun, Opts, fun verify_hostname_extract_fqdn_default/1),
+
+ ReferenceIDs = [{T,to_string(V)} || {T,V} <- ReferenceIDs0],
+ PresentedIDs =
+ try lists:keyfind(?'id-ce-subjectAltName',
+ #'Extension'.extnID,
+ TbsCert#'OTPTBSCertificate'.extensions)
+ of
+ #'Extension'{extnValue = ExtVals} ->
+ [{T,to_string(V)} || {T,V} <- ExtVals];
+ false ->
+ []
+ catch
+ _:_ -> []
+ end,
+ %% PresentedIDs example: [{dNSName,"ewstest.ericsson.com"}, {dNSName,"www.ericsson.com"}]}
+ case PresentedIDs of
+ [] ->
+ %% Fallback to CN-ids [rfc6125, ch6]
+ case TbsCert#'OTPTBSCertificate'.subject of
+ {rdnSequence,RDNseq} ->
+ PresentedCNs =
+ [{cn, to_string(V)}
+ || ATVs <- RDNseq, % RDNseq is list-of-lists
+ #'AttributeTypeAndValue'{type = ?'id-at-commonName',
+ value = {_T,V}} <- ATVs
+ % _T = kind of string (teletexString etc)
+ ],
+ %% Example of PresentedCNs: [{cn,"www.ericsson.se"}]
+ %% match ReferenceIDs to PresentedCNs
+ verify_hostname_match_loop(verify_hostname_fqnds(ReferenceIDs, FqdnFun),
+ PresentedCNs,
+ MatchFun, FailCB, Cert);
+
+ _ ->
+ false
+ end;
+ _ ->
+ %% match ReferenceIDs to PresentedIDs
+ case verify_hostname_match_loop(ReferenceIDs, PresentedIDs,
+ MatchFun, FailCB, Cert) of
+ false ->
+ %% Try to extract DNS-IDs from URIs etc
+ DNS_ReferenceIDs =
+ [{dns_is,X} || X <- verify_hostname_fqnds(ReferenceIDs, FqdnFun)],
+ verify_hostname_match_loop(DNS_ReferenceIDs, PresentedIDs,
+ MatchFun, FailCB, Cert);
+ true ->
+ true
+ end
+ end.
%%--------------------------------------------------------------------
-spec ssh_decode(binary(), public_key | ssh_file()) -> [{public_key(), Attributes::list()}]
@@ -1200,3 +1271,96 @@ ascii_to_lower(String) ->
end)>>
||
<<C>> <= iolist_to_binary(String) >>.
+
+%%%----------------------------------------------------------------
+%%% pkix_verify_hostname help functions
+verify_hostname_extract_fqdn_default({dns_id,S}) ->
+ S;
+verify_hostname_extract_fqdn_default({uri_id,URI}) ->
+ {ok,{https,_,Host,_,_,_}} = http_uri:parse(URI),
+ Host.
+
+
+verify_hostname_fqnds(L, FqdnFun) ->
+ [E || E0 <- L,
+ E <- [try case FqdnFun(E0) of
+ default -> verify_hostname_extract_fqdn_default(E0);
+ undefined -> undefined; % will make the "is_list(E)" test fail
+ Other -> Other
+ end
+ catch _:_-> undefined % will make the "is_list(E)" test fail
+ end],
+ is_list(E),
+ E =/= "",
+ {error,einval} == inet:parse_address(E)
+ ].
+
+
+-define(srvName_OID, {1,3,6,1,4,1,434,2,2,1,37,0}).
+
+verify_hostname_match_default(Ref, Pres) ->
+ verify_hostname_match_default0(to_lower_ascii(Ref), to_lower_ascii(Pres)).
+
+verify_hostname_match_default0(FQDN=[_|_], {cn,FQDN}) ->
+ not lists:member($*, FQDN);
+verify_hostname_match_default0(FQDN=[_|_], {cn,Name=[_|_]}) ->
+ [F1|Fs] = string:tokens(FQDN, "."),
+ [N1|Ns] = string:tokens(Name, "."),
+ match_wild(F1,N1) andalso Fs==Ns;
+verify_hostname_match_default0({dns_id,R}, {dNSName,P}) ->
+ R==P;
+verify_hostname_match_default0({uri_id,R}, {uniformResourceIdentifier,P}) ->
+ R==P;
+verify_hostname_match_default0({srv_id,R}, {T,P}) when T == srvName ;
+ T == ?srvName_OID ->
+ R==P;
+verify_hostname_match_default0(_, _) ->
+ false.
+
+
+match_wild(A, [$*|B]) -> match_wild_suffixes(A, B);
+match_wild([C|A], [ C|B]) -> match_wild(A, B);
+match_wild([], []) -> true;
+match_wild(_, _) -> false.
+
+%% Match the parts after the only wildcard by comparing them from the end
+match_wild_suffixes(A, B) -> match_wild_sfx(lists:reverse(A), lists:reverse(B)).
+
+match_wild_sfx([$*|_], _) -> false; % Bad name (no wildcards alowed)
+match_wild_sfx(_, [$*|_]) -> false; % Bad pattern (no more wildcards alowed)
+match_wild_sfx([A|Ar], [A|Br]) -> match_wild_sfx(Ar, Br);
+match_wild_sfx(Ar, []) -> not lists:member($*, Ar); % Chk for bad name (= wildcards)
+match_wild_sfx(_, _) -> false.
+
+
+verify_hostname_match_loop(Refs0, Pres0, undefined, FailCB, Cert) ->
+ Pres = lists:map(fun to_lower_ascii/1, Pres0),
+ Refs = lists:map(fun to_lower_ascii/1, Refs0),
+ lists:any(
+ fun(R) ->
+ lists:any(fun(P) ->
+ verify_hostname_match_default(R,P) orelse FailCB(Cert)
+ end, Pres)
+ end, Refs);
+verify_hostname_match_loop(Refs, Pres, MatchFun, FailCB, Cert) ->
+ lists:any(
+ fun(R) ->
+ lists:any(fun(P) ->
+ (case MatchFun(R,P) of
+ default -> verify_hostname_match_default(R,P);
+ Bool -> Bool
+ end) orelse FailCB(Cert)
+ end,
+ Pres)
+ end,
+ Refs).
+
+
+to_lower_ascii(S) when is_list(S) -> lists:map(fun to_lower_ascii/1, S);
+to_lower_ascii({T,S}) -> {T, to_lower_ascii(S)};
+to_lower_ascii(C) when $A =< C,C =< $Z -> C + ($a-$A);
+to_lower_ascii(C) -> C.
+
+to_string(S) when is_list(S) -> S;
+to_string(B) when is_binary(B) -> binary_to_list(B).
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-08 07:04:58 +0000