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Extract all bindings and support multiple certificates when decoding idp metadata #26

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c69bc57
extract all bindings in esaml:decode_idp_metadata/1
srenatus Jun 21, 2016
eddded6
extract multiple certificates from IdP metadata
srenatus Jun 21, 2016
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6 changes: 4 additions & 2 deletions include/esaml.hrl
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Original file line number Diff line number Diff line change
Expand Up @@ -34,9 +34,11 @@
org = #esaml_org{} :: esaml:org(),
tech = #esaml_contact{} :: esaml:contact(),
signed_requests = true :: boolean(),
certificate :: binary() | undefined,
certificates :: [binary()] | undefined,
entity_id = "" :: string(),
login_location = "" :: string(),
login_location_post :: string(),
login_location_redirect :: string(),
login_location_artifact :: string(),
logout_location :: string() | undefined,
name_format = unknown :: esaml:name_format()}).

Expand Down
40 changes: 36 additions & 4 deletions src/esaml.erl
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Expand Up @@ -144,17 +144,28 @@ decode_idp_metadata(Xml) ->
{"ds", 'http://www.w3.org/2000/09/xmldsig#'}],
esaml_util:threaduntil([
?xpath_attr_required("/md:EntityDescriptor/@entityID", esaml_idp_metadata, entity_id, bad_entity),
?xpath_attr_required("/md:EntityDescriptor/md:IDPSSODescriptor/md:SingleSignOnService[@Binding='urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST']/@Location",
esaml_idp_metadata, login_location, missing_sso_location),
?xpath_attr("/md:EntityDescriptor/md:IDPSSODescriptor/md:SingleSignOnService[@Binding='urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST']/@Location",
esaml_idp_metadata, login_location_post),
?xpath_attr("/md:EntityDescriptor/md:IDPSSODescriptor/md:SingleSignOnService[@Binding='urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect']/@Location",
esaml_idp_metadata, login_location_redirect),
?xpath_attr("/md:EntityDescriptor/md:IDPSSODescriptor/md:SingleSignOnService[@Binding='urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Artifact']/@Location",
esaml_idp_metadata, login_location_artifact),
?xpath_attr("/md:EntityDescriptor/md:IDPSSODescriptor/md:SingleLogoutService[@Binding='urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST']/@Location",
esaml_idp_metadata, logout_location),
?xpath_text("/md:EntityDescriptor/md:IDPSSODescriptor/md:NameIDFormat/text()",
esaml_idp_metadata, name_format, fun nameid_map/1),
?xpath_text("/md:EntityDescriptor/md:IDPSSODescriptor/md:KeyDescriptor[@use='signing']/ds:KeyInfo/ds:X509Data/ds:X509Certificate/text()", esaml_idp_metadata, certificate, fun(X) -> base64:decode(list_to_binary(X)) end),
?xpath_text_multiple("/md:EntityDescriptor/md:IDPSSODescriptor/md:KeyDescriptor[@use='signing']/ds:KeyInfo/ds:X509Data/ds:X509Certificate/text()", esaml_idp_metadata, certificates, fun(X) -> base64:decode(erlang:list_to_binary(X)) end),
?xpath_recurse("/md:EntityDescriptor/md:ContactPerson[@contactType='technical']", esaml_idp_metadata, tech, decode_contact),
?xpath_recurse("/md:EntityDescriptor/md:Organization", esaml_idp_metadata, org, decode_org)
?xpath_recurse("/md:EntityDescriptor/md:Organization", esaml_idp_metadata, org, decode_org),
fun check_at_least_one_binding/1
], #esaml_idp_metadata{}).

check_at_least_one_binding(#esaml_idp_metadata{login_location_post = undefined,
login_location_redirect = undefined,
login_location_artifact = undefined}) ->
{error, missing_sso_location};
check_at_least_one_binding(M) -> M.

%% @private
-spec decode_org(Xml :: #xmlElement{}) -> {ok, #esaml_org{}} | {error, term()}.
decode_org(Xml) ->
Expand Down Expand Up @@ -636,4 +647,25 @@ validate_stale_assertion_test() ->
}),
{error, stale_assertion} = validate_assertion(E1, "foobar", "foo").

decode_idp_metadata_with_multiple_bindings_test() ->
{Doc, _} = xmerl_scan:file("../test/data/okta_metadata.xml"),
{ok, IdP} = decode_idp_metadata(Doc),
#esaml_idp_metadata{login_location_post = "https://dev-xxx.okta.com/somehash/sso/saml_post"} = IdP,
#esaml_idp_metadata{login_location_redirect = "https://dev-xxx.okta.com/somehash/sso/saml_redirect"} = IdP,
#esaml_idp_metadata{login_location_artifact = "https://dev-xxx.okta.com/somehash/sso/saml_artifact"} = IdP.

decode_idp_metadata_with_one_certificate_only_test() ->
{Doc, _} = xmerl_scan:file("../test/data/okta_metadata.xml"),
{ok, IdP} = decode_idp_metadata(Doc),
[Cert] = IdP#esaml_idp_metadata.certificates,
true = Cert =/= undefined.

decode_idp_metadata_with_multiple_certificates_test() ->
{Doc, _} = xmerl_scan:file("../test/data/azure_metadata.xml"),
{ok, IdP} = decode_idp_metadata(Doc),
[Cert, AnotherCert|_] = IdP#esaml_idp_metadata.certificates,
true = Cert =/= undefined,
true = AnotherCert =/= undefined,
true = Cert =/= AnotherCert.

-endif.
16 changes: 15 additions & 1 deletion src/xmerl_xpath_macros.hrl
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Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,15 @@
end
end).

-define(xpath_generic_multiple(XPath, Record, Field, TransFun, TargetType, NotFoundRet),
fun(Resp) ->
case xmerl_xpath:string(XPath, Xml, [{namespace, Ns}]) of
[_|_] = List ->
Resp#Record{Field = lists:map(TransFun, [V || #TargetType{value = V} <- List])};
_ -> NotFoundRet
end
end).

-define(xpath_generic(XPath, Record, Field, TargetType, NotFoundRet),
fun(Resp) ->
case xmerl_xpath:string(XPath, Xml, [{namespace, Ns}]) of
Expand All @@ -37,6 +46,11 @@
-define(xpath_text(XPath, Record, Field, TransFun),
?xpath_generic(XPath, Record, Field, TransFun, xmlText, Resp)).

-define(xpath_text_multiple(XPath, Record, Field),
?xpath_generic_multiple(XPath, Record, Field, xmlText, Resp)).
-define(xpath_text_multiple(XPath, Record, Field, TransFun),
?xpath_generic_multiple(XPath, Record, Field, TransFun, xmlText, Resp)).

-define(xpath_text_required(XPath, Record, Field, Error),
?xpath_generic(XPath, Record, Field, xmlText, {error, Error})).
-define(xpath_text_required(XPath, Record, Field, TransFun, Error),
Expand All @@ -60,4 +74,4 @@
end;
_ -> Resp
end
end).
end).
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