Adding client identity authentication using JWTs tokens #4
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This commit introduces the client identity authentication using envoy as a proxy responsible to enforce the policy rules by deploying the http.jwt_authn filter which will process ingress requests to select workload and validate it using the configured external identity provider (e.g. auth0). Changes: - CiliumNetwrokPolicy CRD - Policy Parsing - Envoy redirects addition - Envoy filters configuration The unit tests and e2e as well still missing.
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This PR adds client identity authentication capabilities [1] by leveraging JWT Authentication mechanism provided by Envoy's filter extensions.filters.http.jwt_authn [2].
Adding matchJWT object as attribute to http rule set;
Parses applied policy containing matchJWT;
Hands over object parsed from policy to proxy xDS server (envoy API);
Adds envoy redirect with jwt_authn filter in place which listen for ingress traffic and authorize it by validating header token against policy data.
NOTE: it is necessary to enable the needed extension on envoy proxy. To enable it is necessary to uncomment the line below on proxy source file envoy_build_config/extensions_build_config.bzl, recompile the source and replace the cilium-envoy binary on system:
"envoy.filters.http.jwt_authn": "//source/extensions/filters/http/jwt_authn:config",
References:
[1] https://kloudone.atlassian.net/wiki/spaces/AC/pages/1271202197/Draft+PRD+Microsegmentation+with+Client+JWT+Identity
[2] https://www.envoyproxy.io/docs/envoy/latest/api-v3/extensions/filters/http/jwt_authn/v3/config.proto.html