April 2020 - satosa-users - lists3.sunet.se

by xenophon＠irtnog.org

I want to again say "thanks" to Ioannis, Rainer, Scott, and everyone else for their help and instruction during the various IdentityPython and SATOSA meetings at TIIME this week. Chris Phillips and I were able to get a SATOSA 3.4.8 deployment working in Chris's idp-installer test bed. To that end I want to share my notes from the process, at the end of which an interested party could perform a basic, end-to-end test of the current SATOSA release using SAMLtest (https://samltest.id/) 1. I installed Ubuntu Server 18.04.1; run the following commands as root to install the prerequisites: ```sh apt update apt dist-upgrade -y apt install -y git python3-dev build-essential python3-pip libffi-dev libssl-dev xmlsec1 libyaml-dev libxml2-utils pip3 install --upgrade virtualenv virtualenv -p python3 /opt/satosa /opt/satosa/bin/pip install --upgrade pip setuptools /opt/satosa/bin/pip install SATOSA ``` This is essentially the Docker image build process, only it uses the current SATOSA release (etc.) on PyPI. 2. Copy https://github.com/IdentityPython/SATOSA/tree/v3.4.8/docker/attributemap s to /opt/satosa/attributemaps. I'm not sure this is strictly necessary as the built-in pysaml2 attribute maps should be used by default, but it's what the Docker image build process does. 3. Copy https://github.com/IdentityPython/SATOSA/tree/v3.4.8/example to /opt/satosa/etc. 4. SATOSA doesn't have a default configuration, so you must provide it yourself. ```sh cp /opt/satosa/etc/proxy_conf.yaml.example \ /opt/satosa/etc/proxy_conf.yaml cp /opt/satosa/etc/internal_attributes.yaml.example \ /opt/satosa/etc/internal_attributes.yaml cp /opt/satosa/etc/plugins/frontends/saml2_frontend.yaml.example \ /opt/satosa/etc/plugins/frontends/saml2_frontend.yaml cp /opt/satosa/etc/plugins/backends/saml2_backend.yaml.example \ /opt/satosa/etc/plugins/backends/saml2_backend.yaml cp /opt/satosa/etc/plugins/microservices/static_attributes.yaml.example \ /opt/satosa/etc/plugins/microservices/static_attributes.yaml ``` 5. You may change the proxy URL (the value of BASE in /opt/satosa/etc/proxy_conf.yaml), but it _must_ be a method plus hostname without any trailing slash or path components, e.g., `https://proxy.example.com`, not `https://proxy.example.com/` nor `https://proxy.example.com/satosa`. SATOSA must be hosted at the root of your web site. 6. Comment out the `idp_blacklist_file` and `disco_srv` settings in /opt/satosa/etc/plugins/backends/saml2_backend.yaml. 7. Generate IdP, SP, metadata signing, and web site keying material: ```sh for i in frontend backend metadata https; do openssl req -batch -x509 -nodes -days 3650 -newkey rsa:2048 \ -keyout /opt/satosa/etc/$i.key -out /opt/satosa/etc/$i.crt \ -subj /CN=proxy.example.com done ``` 8. Download the SAMLtest metadata. ```sh curl https://samltest.id/saml/sp > /opt/satosa/etc/sp.xml curl https://samltest.id/saml/idp > /opt/satosa/etc/idp.xml ``` 9. Generate the proxy metadata. (How you do this changes in future releases of SATOSA.) ```sh . /opt/satosa/bin/activate cd /opt/satosa/etc satosa-saml-metadata proxy_conf.yaml metadata.key metadata.crt --split-frontend --split-backend --dir /opt/satosa/etc xmllint --format /opt/satosa/etc/Saml2IDP_0.xml > /opt/satosa/etc/proxy-idp.xml xmllint --format /opt/satosa/etc/Saml2_0.xml > /opt/satosa/etc/proxy-sp.xml ``` 10. Edit the proxy metadata files to remove the `<ns1:Signature>` element, else SAMLtest will be unable to load them due to an invalid signature. 11. Upload the proxy metadata to SAMLtest (https://samltest.id/upload.php) 12. SAMLtest doesn't release the eduPerson Targeted ID attribute, so you'll need to change the last three lines of /opt/satosa/etc/internal_attributes.yaml to the following (and before anyone says anything, NEVER USE AN EMAIL ADDRESS AS AN IDENTIFIER---this is just a quick hack to get SATOSA working): ``` hash: [mail] user_id_from_attrs: [mail] user_id_to_attr: mail ``` 13. Start SATOSA: ```sh . /opt/satosa/bin/activate cd /opt/satosa/etc gunicorn -b0.0.0.0:443 --keyfile https.key --certfile https.crt satosa.wsgi:app ``` 14. At this point you should be able to perform an IdP test (https://samltest.id/start-idp-test/) by specifying the entity ID of the proxy's front end, e.g., https://example.com/Saml2IDP/proxy.xml. The SAMLtest SP will request authentication by your proxy IdP, causing your proxy SP to request authentication by the SAMLtest IdP. If everything works right, you will end up back at the SAMLtest SP: SAMLtest SP ---AuthnRequest---> SATOSA front end (IdP)/back end (SP) ---AuthnRequest---> SAMLtest IdP SAMLtest SP <---AuthnResponse--- SATOSA front end (IdP)/back end (SP) <---AuthnResponse--- SAMLtest IdP I hope this helps other adopters. If you have any questions, please reply on list so everyone can benefit from the discussion. Best wishes, Matthew -- "The lyf so short, the craft so longe to lerne."

2 weeks, 1 day

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Different discovery service for different SPs

by xenophon＠irtnog.org

Dear all, Is it possible to use a different discovery service depending on the SP that sent a SAML AuthnRequest to SATOSA, or do I have to do that in the discovery service's frontend somehow? Best wishes, Matthew -- "The lyf so short, the craft so longe to lerne."

5 months, 3 weeks

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oidc client registration

by peter.schober＠univie.ac.at

Not knowing whether my satosa instance is fully working yet (see my other thread) I'm now continuing to try to get the application (eduMEET) to work with satosa's oidc frontend, as per the app's published config example: https://github.com/havfo/multiparty-meeting/blob/master/server/config/confi… So I've made up a client_id and client_secret on the RP side and provided the client with an issuerURL (base URL of satosa), let it request all the scopes in the world and set its own redirect_uri. With those all set I do see requests to satosa's .well-known endpoints from the application in satosa logs, e.g. Found registered endpoint: module name:'oidc', endpoint: .well-known/openid-configuration (And of course accessing the endpoint myself I can see that it works and produces JSON with its config.) Now on the OP side (satosa oidc frontend) I haven't done any setup for the client yet, so I guess the error in the log is to be expected: Error in authn req: Unknown client_id Now what would be the next steps to register that client? The request from the client (according to satosa's logs) has these query parameters (where cid and csec are the correct client_id and client_secret, respectively): client_id=cid&scope=openid+email+profile&response_type=code&redirect_uri=https%3A%2F%2Fexample.org%2Fauth%2Fcallback&state=e30%3D&client_secret=csec My plugins/frontends/openid_connect_frontend.yaml looks like the published example, essentially: module: satosa.frontends.openid_connect.OpenIDConnectFrontend name: oidc config: signing_key_path: /etc/satosa/oidc-provider.key #db_uri: mongodb://db.example.com # optional: only support MongoDB, will default to in-memory storage if not specified client_db_path: /etc/satosa/oidc-clients.json provider: client_registration_supported: True response_types_supported: ['code', 'token', 'id_token'] subject_types_supported: ['public', 'pairwise'] scopes_supported: ['openid', 'email', 'profile'] Only that I tried to enable pretty much everything (all repose and subject types, all scopes, client registration) since I had no idea what the RP side wants, yet. (Seems I can remove all response types except 'code', as per the log shown above.) I don't have MongoDB set up yet since the comment above suggests an in-memory store would be used, which is fine for my current testing. And looking at _create_provider() at frontends/openid_connect.py the code would use the file referenced by client_db_path if db_uri isn't set even before falling back to storing it in a variable. The file referenced in client_db_path exists, is writable by the user satosa runs as, and currently contains only '{}' (without the quotes). So IMO that should be sufficient. Any hints on how to register the application? The documenation is a bit sparse here https://github.com/IdentityPython/SATOSA/blob/master/doc/README.md#frontend… only mentioning that *without* dynamic client registration (which I have enabled for now, but maybe the RP doesn't support it) I'd have to manually create the data structures in MongoDB (or the file in client_db_path) for my client, as per the oidc spec for Client Registration Responses. Could someone share a json sample to put into the file referenced by client_db_path (if that's how it's supposed to work)? Cheers, -peter

6 months, 2 weeks

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Help with SaToSa

by kristo.jorgenson＠gmail.com

Hi all, I am a developer working on an open source project called SimplyE which is an eBook platform originally developed by the New York Public Library, but now being used by many public libraries across the US. The company I work for (Lyrasis) is currently adding support for university libraries, and with that comes supporting SAML. We are looking for someone experienced in federated authentication to assist us in this, and I thought I would reach out here to see if anyone is looking for contract work. If you are interested, or know anyone who might be, please be in touch with me via this email. Thanks so much, Kristo

5 years, 11 months

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InvalidAuthorizationCode

by peter.schober＠univie.ac.at

Since I've been able to answer my own question about manual client registration (w/o MongoDB) in another thread (now resolved) https://lists.sunet.se/pipermail/satosa-users/2020-March/000120.html I'm starting a new thread about the latter (unrelated) issue: Starting at the oidc-enabled app I'm sent to satosa with an auth request, the client is now known/found (client_db details shared at the above URL), the saml backend is involked, SAML WebSSO happens, attributes are mapped and I am back "Routing to frontend: oidc". Then satosa raises an InvalidAuthorizationCode exception: [pyop.authz_state.create_authorization_code] creating authz code for scope=openid email profile [pyop.authz_state.create_authorization_code] new authz_code=eff...cd79 to client_id=someClientId for sub=someid at example.org valid_until=1585612419 ... [satosa.proxy_server.unpack_request] read request data: {'grant_type': 'authorization_code', 'code': 'eff...cd79', 'redirect_uri': 'https://some.example.org/auth/callback'} ... [pyop.client_authentication.verify_client_authentication] client authentication in Authorization header Basic base64-encoded-client_id_colon_client_secret [satosa.frontends.openid_connect.token_endpoint] invalid request: eff...cd79 unknown Traceback (most recent call last): File "/usr/local/venv/SATOSA/lib/python3.7/site-packages/satosa/frontends/openid_connect.py", line 363, in token_endpoint response = self.provider.handle_token_request(urlencode(context.request), headers) File "/usr/local/venv/SATOSA/lib/python3.7/site-packages/pyop/provider.py", line 324, in handle_token_request return self._do_code_exchange(token_request, extra_id_token_claims) File "/usr/local/venv/SATOSA/lib/python3.7/site-packages/pyop/provider.py", line 352, in _do_code_exchange authentication_request = self.authz_state.get_authorization_request_for_code(token_request['code']) File "/usr/local/venv/SATOSA/lib/python3.7/site-packages/pyop/authz_state.py", line 320, in get_authorization_request_for_code raise InvalidAuthorizationCode('{} unknown'.format(authorization_code)) pyop.exceptions.InvalidAuthorizationCode: eff...cd79 unknown So the authz code created above (first line) is now unkown (last line). Why would that happen and what can I do to avoid it? On the RP side (seemingly using https://www.npmjs.com/package/openid-client) I currently only see the same thing as RP is merely relaying the OP error, it seems. And this being an OP error I probably don't have to dig into the RP side to get more/better logging: OPError: invalid_grant (eff...cd79 unknown) at processResponse (/opt/edumeet/mm/server/node_modules/openid-client/lib/helpers/process_response.js:45:13) at Client.grant (/opt/edumeet/mm/server/node_modules/openid-client/lib/client.js:1235:26) at process._tickCallback (internal/process/next_tick.js:68:7) I'd appreciate suggestions on what I could have done wrong following the satosa documentation where available, or how to further debug this issue. If other/more information (config details, logs, etc.) are needed or my obscuring of details above is unclear I'm happy to provide those. -peter

6 years

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satosa-users April 2020