syntax = "proto3";

package envoy.extensions.filters.http.jwt_authn.v3;

import "envoy/config/core/v3/base.proto";
import "envoy/config/core/v3/http_uri.proto";
import "envoy/config/route/v3/route_components.proto";
import "envoy/type/matcher/v3/string.proto";

import "google/protobuf/duration.proto";
import "google/protobuf/empty.proto";

import "udpa/annotations/status.proto";
import "udpa/annotations/versioning.proto";
import "validate/validate.proto";

option java_package = "io.envoyproxy.envoy.extensions.filters.http.jwt_authn.v3";
option java_outer_classname = "ConfigProto";
option java_multiple_files = true;
option go_package = "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/http/jwt_authn/v3;jwt_authnv3";
option (udpa.annotations.file_status).package_version_status = ACTIVE;

// [#protodoc-title: JWT Authentication]
// JWT Authentication :ref:`configuration overview <config_http_filters_jwt_authn>`.
// [#extension: envoy.filters.http.jwt_authn]

// Please see following for JWT authentication flow:
//
// * `JSON Web Token (JWT) <https://tools.ietf.org/html/rfc7519>`_
// * `The OAuth 2.0 Authorization Framework <https://tools.ietf.org/html/rfc6749>`_
// * `OpenID Connect <http://openid.net/connect>`_
//
// A JwtProvider message specifies how a JSON Web Token (JWT) can be verified. It specifies:
//
// * issuer: the principal that issues the JWT. If specified, it has to match the ``iss`` field in JWT.
// * allowed audiences: the ones in the token have to be listed here.
// * how to fetch public key JWKS to verify the token signature.
// * how to extract the JWT in the request.
// * how to pass successfully verified token payload.
//
// Example:
//
// .. code-block:: yaml
//
//     issuer: https://example.com
//     audiences:
//     - bookstore_android.apps.googleusercontent.com
//     - bookstore_web.apps.googleusercontent.com
//     remote_jwks:
//       http_uri:
//         uri: https://example.com/.well-known/jwks.json
//         cluster: example_jwks_cluster
//         timeout: 1s
//       cache_duration:
//         seconds: 300
//
// [#next-free-field: 22]
message JwtProvider {
  option (udpa.annotations.versioning).previous_message_type =
      "envoy.config.filter.http.jwt_authn.v2alpha.JwtProvider";

  // Alters the payload representation in the request dynamic metadata to facilitate its use in matching.
  message NormalizePayload {
    // Each claim in this list will be interpreted as a space-delimited string
    // and converted to a list of strings based on the delimited values.
    // Example: a token with a claim ``scope: "email profile"`` is translated
    // to dynamic metadata  ``scope: ["email", "profile"]`` if this field is
    // set value ``["scope"]``. This special handling of ``scope`` is
    // recommended by `RFC8693
    // <https://datatracker.ietf.org/doc/html/rfc8693#name-scope-scopes-claim>`_.
    repeated string space_delimited_claims = 1;
  }

  // Specify the `principal <https://tools.ietf.org/html/rfc7519#section-4.1.1>`_ that issued
  // the JWT, usually a URL or an email address.
  //
  // It is optional. If specified, it has to match the ``iss`` field in JWT,
  // otherwise the JWT ``iss`` field is not checked.
  //
  // Note: ``JwtRequirement`` :ref:`allow_missing <envoy_v3_api_field_extensions.filters.http.jwt_authn.v3.JwtRequirement.allow_missing>`
  // and :ref:`allow_missing_or_failed <envoy_v3_api_field_extensions.filters.http.jwt_authn.v3.JwtRequirement.allow_missing_or_failed>`
  // are implemented differently than other ``JwtRequirements``. Hence the usage of this field
  // is different as follows if ``allow_missing`` or ``allow_missing_or_failed`` is used:
  //
  // * If a JWT has ``iss`` field, it needs to be specified by this field in one of ``JwtProviders``.
  // * If a JWT doesn't have ``iss`` field, one of ``JwtProviders`` should fill this field empty.
  // * Multiple ``JwtProviders`` should not have same value in this field.
  //
  // Example: https://securetoken.google.com
  // Example: 1234567-compute@developer.gserviceaccount.com
  //
  string issuer = 1;

  // The list of JWT `audiences <https://tools.ietf.org/html/rfc7519#section-4.1.3>`_ are
  // allowed to access. A JWT containing any of these audiences will be accepted. If not specified,
  // will not check audiences in the token.
  //
  // Example:
  //
  // .. code-block:: yaml
  //
  //     audiences:
  //     - bookstore_android.apps.googleusercontent.com
  //     - bookstore_web.apps.googleusercontent.com
  //
  repeated string audiences = 2;

  // Restrict the `subjects <https://tools.ietf.org/html/rfc7519#section-4.1.2>`_
  // that the JwtProvider can assert. For instance, this could implement JWT-SVID
  // `subject restrictions <https://github.com/spiffe/spiffe/blob/main/standards/JWT-SVID.md#31-subject>`_.
  // If not specified, will not check subjects in the token.
  //
  // Example:
  //
  // .. code-block:: yaml
  //
  //     subjects:
  //       prefix: spiffe://spiffe.example.com/
  //
  type.matcher.v3.StringMatcher subjects = 19;

  // Requires that the credential contains an `expiration <https://tools.ietf.org/html/rfc7519#section-4.1.4>`_.
  // For instance, this could implement JWT-SVID
  // `expiration restrictions <https://github.com/spiffe/spiffe/blob/main/standards/JWT-SVID.md#33-expiration-time>`_.
  // Unlike ``max_lifetime``, this only requires that expiration is present, where ``max_lifetime`` also checks the value.
  //
  // Example:
  //
  // .. code-block:: yaml
  //
  //     require_expiration: true
  //
  bool require_expiration = 20;

  // Restrict the maximum remaining lifetime of a credential from the JwtProvider. Credential lifetime
  // is the difference between the current time and the expiration of the credential. For instance,
  // the following example will reject credentials that have a lifetime longer than 24 hours. If not set,
  // expiration checking still occurs, but there is no limit on credential lifetime. If set, takes precedence
  // over ``require_expiration``.
  //
  // Example:
  //
  // .. code-block:: yaml
  //
  //     max_lifetime:
  //       seconds: 86400
  //
  google.protobuf.Duration max_lifetime = 21;

  // `JSON Web Key Set (JWKS) <https://tools.ietf.org/html/rfc7517#appendix-A>`_ is needed to
  // validate signature of a JWT. This field specifies where to fetch JWKS.
  oneof jwks_source_specifier {
    option (validate.required) = true;

    // JWKS can be fetched from remote server via HTTP/HTTPS. This field specifies the remote HTTP
    // URI and how the fetched JWKS should be cached.
    //
    // Example:
    //
    // .. code-block:: yaml
    //
    //    remote_jwks:
    //      http_uri:
    //        uri: https://www.googleapis.com/oauth2/v1/certs
    //        cluster: jwt.www.googleapis.com|443
    //        timeout: 1s
    //      cache_duration:
    //        seconds: 300
    //
    RemoteJwks remote_jwks = 3;

    // JWKS is in local data source. It could be either in a local file or embedded in the
    // inline_string.
    //
    // Example: local file
    //
    // .. code-block:: yaml
    //
    //    local_jwks:
    //      filename: /etc/envoy/jwks/jwks1.txt
    //
    // Example: inline_string
    //
    // .. code-block:: yaml
    //
    //    local_jwks:
    //      inline_string: ACADADADADA
    //
    config.core.v3.DataSource local_jwks = 4;
  }

  // If false, the JWT is removed in the request after a success verification. If true, the JWT is
  // not removed in the request. Default value is false.
  // caveat: only works for from_header/from_params & has no effect for JWTs extracted through from_cookies.
  bool forward = 5;

  // Two fields below define where to extract the JWT from an HTTP request.
  //
  // If no explicit location is specified, the following default locations are tried in order:
  //
  // 1. The Authorization header using the `Bearer schema
  // <https://tools.ietf.org/html/rfc6750#section-2.1>`_. Example::
  //
  //    Authorization: Bearer <token>.
  //
  // 2. `access_token <https://tools.ietf.org/html/rfc6750#section-2.3>`_ query parameter.
  //
  // Multiple JWTs can be verified for a request. Each JWT has to be extracted from the locations
  // its provider specified or from the default locations.
  //
  // Specify the HTTP headers to extract the JWT. For examples, following config:
  //
  // .. code-block:: yaml
  //
  //   from_headers:
  //   - name: x-goog-iap-jwt-assertion
  //
  // can be used to extract token from header::
  //
  //   ``x-goog-iap-jwt-assertion: <JWT>``.
  //
  repeated JwtHeader from_headers = 6;

  // JWT is sent in a query parameter. ``jwt_params`` represents the query parameter names.
  //
  // For example, if config is:
  //
  // .. code-block:: yaml
  //
  //   from_params:
  //   - jwt_token
  //
  // The JWT format in query parameter is::
  //
  //    /path?jwt_token=<JWT>
  //
  repeated string from_params = 7;

  // JWT is sent in a cookie. ``from_cookies`` represents the cookie names to extract from.
  //
  // For example, if config is:
  //
  // .. code-block:: yaml
  //
  //   from_cookies:
  //   - auth-token
  //
  // Then JWT will be extracted from ``auth-token`` cookie in the request.
  //
  repeated string from_cookies = 13;

  // This field specifies the header name to forward a successfully verified JWT payload to the
  // backend. The forwarded data is::
  //
  //    base64url_encoded(jwt_payload_in_JSON)
  //
  // If it is not specified, the payload will not be forwarded.
  string forward_payload_header = 8
      [(validate.rules).string = {well_known_regex: HTTP_HEADER_NAME strict: false}];

  // When :ref:`forward_payload_header <envoy_v3_api_field_extensions.filters.http.jwt_authn.v3.JwtProvider.forward_payload_header>`
  // is specified, the base64 encoded payload will be added to the headers.
  // Normally JWT based64 encode doesn't add padding. If this field is true,
  // the header will be padded.
  //
  // This field is only relevant if :ref:`forward_payload_header <envoy_v3_api_field_extensions.filters.http.jwt_authn.v3.JwtProvider.forward_payload_header>`
  // is specified.
  bool pad_forward_payload_header = 11;

  // If non empty, successfully verified JWT payloads will be written to StreamInfo DynamicMetadata
  // in the format as: ``namespace`` is the jwt_authn filter name as ````envoy.filters.http.jwt_authn````
  // The value is the ``protobuf::Struct``. The value of this field will be the key for its ``fields``
  // and the value is the ``protobuf::Struct`` converted from JWT JSON payload.
  //
  // For example, if payload_in_metadata is ``my_payload``:
  //
  // .. code-block:: yaml
  //
  //   envoy.filters.http.jwt_authn:
  //     my_payload:
  //       iss: https://example.com
  //       sub: test@example.com
  //       aud: https://example.com
  //       exp: 1501281058
  //
  string payload_in_metadata = 9;

  // Normalizes the payload representation in the request metadata.
  NormalizePayload normalize_payload_in_metadata = 18;

  // If not empty, similar to :ref:`payload_in_metadata <envoy_v3_api_field_extensions.filters.http.jwt_authn.v3.JwtProvider.payload_in_metadata>`,
  // a successfully verified JWT header will be written to :ref:`Dynamic State <arch_overview_data_sharing_between_filters>`
  // as an entry (``protobuf::Struct``) in ``envoy.filters.http.jwt_authn`` ``namespace`` with the
  // value of this field as the key.
  //
  // For example, if ``header_in_metadata`` is ``my_header``:
  //
  // .. code-block:: yaml
  //
  //   envoy.filters.http.jwt_authn:
  //     my_header:
  //       alg: JWT
  //       kid: EF71iSaosbC5C4tC6Syq1Gm647M
  //       alg: PS256
  //
  // When the metadata has ``envoy.filters.http.jwt_authn`` entry already (for example if
  // :ref:`payload_in_metadata <envoy_v3_api_field_extensions.filters.http.jwt_authn.v3.JwtProvider.payload_in_metadata>`
  // is not empty), it will be inserted as a new entry in the same ``namespace`` as shown below:
  //
  // .. code-block:: yaml
  //
  //   envoy.filters.http.jwt_authn:
  //     my_payload:
  //       iss: https://example.com
  //       sub: test@example.com
  //       aud: https://example.com
  //       exp: 1501281058
  //     my_header:
  //       alg: JWT
  //       kid: EF71iSaosbC5C4tC6Syq1Gm647M
  //       alg: PS256
  //
  // .. warning::
  //   Using the same key name for :ref:`header_in_metadata <envoy_v3_api_field_extensions.filters.http.jwt_authn.v3.JwtProvider.payload_in_metadata>`
  //   and :ref:`payload_in_metadata <envoy_v3_api_field_extensions.filters.http.jwt_authn.v3.JwtProvider.payload_in_metadata>`
  //   is not suggested due to potential override of existing entry, while it is not enforced during
  //   config validation.
  //
  string header_in_metadata = 14;

  // If non empty, the failure status ``::google::jwt_verify::Status`` for a non verified JWT will be written to StreamInfo DynamicMetadata
  // in the format as: ``namespace`` is the jwt_authn filter name as ``envoy.filters.http.jwt_authn``
  // The value is the ``protobuf::Struct``. The values of this field will be ``code`` and ``message``
  // and they will contain the JWT authentication failure status code and a message describing the failure.
  //
  // For example, if failed_status_in_metadata is ``my_auth_failure_status``:
  //
  // .. code-block:: yaml
  //
  //   envoy.filters.http.jwt_authn:
  //     my_auth_failure_status:
  //       code: 3
  //       message: Jwt expired
  string failed_status_in_metadata = 16;

  // Specify the clock skew in seconds when verifying JWT time constraint,
  // such as ``exp``, and ``nbf``. If not specified, default is 60 seconds.
  uint32 clock_skew_seconds = 10;

  // Enables JWT cache, its size is specified by ``jwt_cache_size``.
  // Only valid JWTs are cached.
  JwtCacheConfig jwt_cache_config = 12;

  // Add JWT claim to HTTP Header
  // Specify the claim name you want to copy in which HTTP header. For examples, following config:
  // The claim must be of type; string, int, double, bool. Array type claims are not supported
  //
  // .. literalinclude:: /_configs/repo/jwt_authn.yaml
  //    :language: yaml
  //    :lines: 44-48
  //    :linenos:
  //    :lineno-start: 44
  //    :caption: :download:`jwt_authn.yaml </_configs/repo/jwt_authn.yaml>`
  //
  // This header is only reserved for jwt claim; any other value will be overwritten.
  repeated JwtClaimToHeader claim_to_headers = 15;

  // Clears route cache in order to allow the JWT to correctly affect
  // routing decisions. Filter clears all cached routes when:
  //
  // 1. The field is set to ``true``.
  //
  // 2. At least one ``claim_to_headers`` header is added to the request OR
  //    if ``payload_in_metadata`` is set.
  //
  bool clear_route_cache = 17;
}

// This message specifies JWT Cache configuration.
message JwtCacheConfig {
  // The unit is number of JWTs, default to 100.
  uint32 jwt_cache_size = 1;

  // The maximum size of a single cached token in bytes.
  // If this field is not set or is set to 0, then the default value 4096 bytes is used.
  // The maximum value for a token is inclusive.
  uint32 jwt_max_token_size = 2;
}

// This message specifies how to fetch JWKS from remote and how to cache it.
message RemoteJwks {
  option (udpa.annotations.versioning).previous_message_type =
      "envoy.config.filter.http.jwt_authn.v2alpha.RemoteJwks";

  // The HTTP URI to fetch the JWKS. For example:
  //
  // .. code-block:: yaml
  //
  //    http_uri:
  //      uri: https://www.googleapis.com/oauth2/v1/certs
  //      cluster: jwt.www.googleapis.com|443
  //      timeout: 1s
  //
  config.core.v3.HttpUri http_uri = 1 [(validate.rules).message = {required: true}];

  // Duration after which the cached JWKS should be expired. If not specified, default cache
  // duration is 10 minutes.
  google.protobuf.Duration cache_duration = 2 [(validate.rules).duration = {
    lt {seconds: 9000000000}
    gte {nanos: 1000000}
  }];

  // Fetch Jwks asynchronously in the main thread before the listener is activated.
  // Fetched Jwks can be used by all worker threads.
  //
  // If this feature is not enabled:
  //
  // * The Jwks is fetched on-demand when the requests come. During the fetching, first
  //   few requests are paused until the Jwks is fetched.
  // * Each worker thread fetches its own Jwks since Jwks cache is per worker thread.
  //
  // If this feature is enabled:
  //
  // * Fetched Jwks is done in the main thread before the listener is activated. Its fetched
  //   Jwks can be used by all worker threads. Each worker thread doesn't need to fetch its own.
  // * Jwks is ready when the requests come, not need to wait for the Jwks fetching.
  //
  JwksAsyncFetch async_fetch = 3;

  // Retry policy for fetching Jwks. optional. turned off by default.
  //
  // For example:
  //
  // .. code-block:: yaml
  //
  //   retry_policy:
  //     retry_back_off:
  //       base_interval: 0.01s
  //       max_interval: 20s
  //     num_retries: 10
  //
  // will yield a randomized truncated exponential backoff policy with an initial delay of 10ms
  // 10 maximum attempts spaced at most 20s seconds.
  //
  // .. code-block:: yaml
  //
  //   retry_policy:
  //     num_retries:1
  //
  // uses the default :ref:`retry backoff strategy <envoy_v3_api_msg_config.core.v3.BackoffStrategy>`.
  // with the default base interval is 1000 milliseconds. and the default maximum interval of 10 times the base interval.
  //
  // if num_retries is omitted, the default is to allow only one retry.
  //
  //
  // If enabled, the retry policy will apply to all Jwks fetching approaches, e.g. on demand or asynchronously in background.
  //
  //
  config.core.v3.RetryPolicy retry_policy = 4;
}

// Fetch Jwks asynchronously in the main thread when the filter config is parsed.
// The listener is activated only after the Jwks is fetched.
// When the Jwks is expired in the cache, it is fetched again in the main thread.
// The fetched Jwks from the main thread can be used by all worker threads.
message JwksAsyncFetch {
  // If false, the listener is activated after the initial fetch is completed.
  // The initial fetch result can be either successful or failed.
  // If true, it is activated without waiting for the initial fetch to complete.
  // Default is false.
  bool fast_listener = 1;

  // The duration to refetch after a failed fetch. If not specified, default is 1 second.
  google.protobuf.Duration failed_refetch_duration = 2;
}

// This message specifies a header location to extract the JWT.
message JwtHeader {
  option (udpa.annotations.versioning).previous_message_type =
      "envoy.config.filter.http.jwt_authn.v2alpha.JwtHeader";

  // The HTTP header name.
  string name = 1
      [(validate.rules).string = {min_len: 1 well_known_regex: HTTP_HEADER_NAME strict: false}];

  // The value prefix. The value format is "value_prefix<token>"
  // For example, for "Authorization: Bearer <token>", value_prefix="Bearer " with a space at the
  // end.
  string value_prefix = 2
      [(validate.rules).string = {well_known_regex: HTTP_HEADER_VALUE strict: false}];
}

// Specify a required provider with audiences.
message ProviderWithAudiences {
  option (udpa.annotations.versioning).previous_message_type =
      "envoy.config.filter.http.jwt_authn.v2alpha.ProviderWithAudiences";

  // Specify a required provider name.
  string provider_name = 1;

  // This field overrides the one specified in the JwtProvider.
  repeated string audiences = 2;
}

// This message specifies a Jwt requirement. An empty message means JWT verification is not
// required. Here are some config examples:
//
// .. code-block:: yaml
//
//  # Example 1: not required with an empty message
//
//  # Example 2: require A
//  provider_name: provider-A
//
//  # Example 3: require A or B
//  requires_any:
//    requirements:
//      - provider_name: provider-A
//      - provider_name: provider-B
//
//  # Example 4: require A and B
//  requires_all:
//    requirements:
//      - provider_name: provider-A
//      - provider_name: provider-B
//
//  # Example 5: require A and (B or C)
//  requires_all:
//    requirements:
//      - provider_name: provider-A
//      - requires_any:
//        requirements:
//          - provider_name: provider-B
//          - provider_name: provider-C
//
//  # Example 6: require A or (B and C)
//  requires_any:
//    requirements:
//      - provider_name: provider-A
//      - requires_all:
//        requirements:
//          - provider_name: provider-B
//          - provider_name: provider-C
//
//  # Example 7: A is optional (if token from A is provided, it must be valid, but also allows
//  missing token.)
//  requires_any:
//    requirements:
//    - provider_name: provider-A
//    - allow_missing: {}
//
//  # Example 8: A is optional and B is required.
//  requires_all:
//    requirements:
//    - requires_any:
//        requirements:
//        - provider_name: provider-A
//        - allow_missing: {}
//    - provider_name: provider-B
//
// [#next-free-field: 7]
message JwtRequirement {
  option (udpa.annotations.versioning).previous_message_type =
      "envoy.config.filter.http.jwt_authn.v2alpha.JwtRequirement";

  oneof requires_type {
    // Specify a required provider name.
    string provider_name = 1;

    // Specify a required provider with audiences.
    ProviderWithAudiences provider_and_audiences = 2;

    // Specify list of JwtRequirement. Their results are OR-ed.
    // If any one of them passes, the result is passed.
    JwtRequirementOrList requires_any = 3;

    // Specify list of JwtRequirement. Their results are AND-ed.
    // All of them must pass, if one of them fails or missing, it fails.
    JwtRequirementAndList requires_all = 4;

    // The requirement is always satisfied even if JWT is missing or the JWT
    // verification fails. A typical usage is: this filter is used to only verify
    // JWTs and pass the verified JWT payloads to another filter, the other filter
    // will make decision. In this mode, all JWTs will be verified.
    google.protobuf.Empty allow_missing_or_failed = 5;

    // The requirement is satisfied if JWT is missing, but failed if JWT is
    // presented but invalid. Similar to allow_missing_or_failed, this is used
    // to only verify JWTs and pass the verified payload to another filter. The
    // different is this mode will reject requests with invalid tokens.
    google.protobuf.Empty allow_missing = 6;
  }
}

// This message specifies a list of RequiredProvider.
// Their results are OR-ed; if any one of them passes, the result is passed
message JwtRequirementOrList {
  option (udpa.annotations.versioning).previous_message_type =
      "envoy.config.filter.http.jwt_authn.v2alpha.JwtRequirementOrList";

  // Specify a list of JwtRequirement.
  repeated JwtRequirement requirements = 1 [(validate.rules).repeated = {min_items: 2}];
}

// This message specifies a list of RequiredProvider.
// Their results are AND-ed; all of them must pass, if one of them fails or missing, it fails.
message JwtRequirementAndList {
  option (udpa.annotations.versioning).previous_message_type =
      "envoy.config.filter.http.jwt_authn.v2alpha.JwtRequirementAndList";

  // Specify a list of JwtRequirement.
  repeated JwtRequirement requirements = 1 [(validate.rules).repeated = {min_items: 2}];
}

// This message specifies a Jwt requirement for a specific Route condition.
// Example 1:
//
// .. code-block:: yaml
//
//    - match:
//        prefix: /healthz
//
// In above example, "requires" field is empty for /healthz prefix match,
// it means that requests matching the path prefix don't require JWT authentication.
//
// Example 2:
//
// .. code-block:: yaml
//
//    - match:
//        prefix: /
//      requires: { provider_name: provider-A }
//
// In above example, all requests matched the path prefix require jwt authentication
// from "provider-A".
message RequirementRule {
  option (udpa.annotations.versioning).previous_message_type =
      "envoy.config.filter.http.jwt_authn.v2alpha.RequirementRule";

  // The route matching parameter. Only when the match is satisfied, the "requires" field will
  // apply.
  //
  // For example: following match will match all requests.
  //
  // .. code-block:: yaml
  //
  //    match:
  //      prefix: /
  //
  config.route.v3.RouteMatch match = 1 [(validate.rules).message = {required: true}];

  // Specify a Jwt requirement.
  // If not specified, Jwt verification is disabled.
  oneof requirement_type {
    // Specify a Jwt requirement. Please see detail comment in message JwtRequirement.
    JwtRequirement requires = 2;

    // Use requirement_name to specify a Jwt requirement.
    // This requirement_name MUST be specified at the
    // :ref:`requirement_map <envoy_v3_api_field_extensions.filters.http.jwt_authn.v3.JwtAuthentication.requirement_map>`
    // in ``JwtAuthentication``.
    string requirement_name = 3 [(validate.rules).string = {min_len: 1}];
  }
}

// This message specifies Jwt requirements based on stream_info.filterState.
// This FilterState should use ``Router::StringAccessor`` object to set a string value.
// Other HTTP filters can use it to specify Jwt requirements dynamically.
//
// Example:
//
// .. code-block:: yaml
//
//    name: jwt_selector
//    requires:
//      issuer_1:
//        provider_name: issuer1
//      issuer_2:
//        provider_name: issuer2
//
// If a filter set "jwt_selector" with "issuer_1" to FilterState for a request,
// jwt_authn filter will use JwtRequirement{"provider_name": "issuer1"} to verify.
message FilterStateRule {
  option (udpa.annotations.versioning).previous_message_type =
      "envoy.config.filter.http.jwt_authn.v2alpha.FilterStateRule";

  // The filter state name to retrieve the ``Router::StringAccessor`` object.
  string name = 1 [(validate.rules).string = {min_len: 1}];

  // A map of string keys to requirements. The string key is the string value
  // in the FilterState with the name specified in the ``name`` field above.
  map<string, JwtRequirement> requires = 3;
}

// This is the Envoy HTTP filter config for JWT authentication.
//
// For example:
//
// .. code-block:: yaml
//
//   providers:
//      provider1:
//        issuer: issuer1
//        audiences:
//        - audience1
//        - audience2
//        remote_jwks:
//          http_uri:
//            uri: https://example.com/.well-known/jwks.json
//            cluster: example_jwks_cluster
//            timeout: 1s
//      provider2:
//        issuer: issuer2
//        local_jwks:
//          inline_string: jwks_string
//
//   rules:
//      # Not jwt verification is required for /health path
//      - match:
//          prefix: /health
//
//      # Jwt verification for provider1 is required for path prefixed with "prefix"
//      - match:
//          prefix: /prefix
//        requires:
//          provider_name: provider1
//
//      # Jwt verification for either provider1 or provider2 is required for all other requests.
//      - match:
//          prefix: /
//        requires:
//          requires_any:
//            requirements:
//              - provider_name: provider1
//              - provider_name: provider2
//
// [#next-free-field: 8]
message JwtAuthentication {
  option (udpa.annotations.versioning).previous_message_type =
      "envoy.config.filter.http.jwt_authn.v2alpha.JwtAuthentication";

  // Map of provider names to JwtProviders.
  //
  // .. code-block:: yaml
  //
  //   providers:
  //     provider1:
  //        issuer: issuer1
  //        audiences:
  //        - audience1
  //        - audience2
  //        remote_jwks:
  //          http_uri:
  //            uri: https://example.com/.well-known/jwks.json
  //            cluster: example_jwks_cluster
  //            timeout: 1s
  //      provider2:
  //        issuer: provider2
  //        local_jwks:
  //          inline_string: jwks_string
  //
  map<string, JwtProvider> providers = 1;

  // Specifies requirements based on the route matches. The first matched requirement will be
  // applied. If there are overlapped match conditions, please put the most specific match first.
  //
  // Examples
  //
  // .. code-block:: yaml
  //
  //   rules:
  //     - match:
  //         prefix: /healthz
  //     - match:
  //         prefix: /baz
  //       requires:
  //         provider_name: provider1
  //     - match:
  //         prefix: /foo
  //       requires:
  //         requires_any:
  //           requirements:
  //             - provider_name: provider1
  //             - provider_name: provider2
  //     - match:
  //         prefix: /bar
  //       requires:
  //         requires_all:
  //           requirements:
  //             - provider_name: provider1
  //             - provider_name: provider2
  //
  repeated RequirementRule rules = 2;

  // This message specifies Jwt requirements based on stream_info.filterState.
  // Other HTTP filters can use it to specify Jwt requirements dynamically.
  // The ``rules`` field above is checked first, if it could not find any matches,
  // check this one.
  FilterStateRule filter_state_rules = 3;

  // When set to true, bypass the `CORS preflight request
  // <http://www.w3.org/TR/cors/#cross-origin-request-with-preflight>`_ regardless of JWT
  // requirements specified in the rules.
  bool bypass_cors_preflight = 4;

  // A map of unique requirement_names to JwtRequirements.
  // :ref:`requirement_name <envoy_v3_api_field_extensions.filters.http.jwt_authn.v3.PerRouteConfig.requirement_name>`
  // in ``PerRouteConfig`` uses this map to specify a JwtRequirement.
  map<string, JwtRequirement> requirement_map = 5;

  // A request failing the verification process will receive a 401 downstream with the failure response details
  // in the body along with WWWAuthenticate header value set with "invalid token". If this value is set to true,
  // the response details will be stripped and only a 401 response code will be returned. Default value is false
  bool strip_failure_response = 6;

  // Optional additional prefix to use when emitting statistics.
  string stat_prefix = 7;
}

// Specify per-route config.
message PerRouteConfig {
  oneof requirement_specifier {
    option (validate.required) = true;

    // Disable Jwt Authentication for this route.
    bool disabled = 1 [(validate.rules).bool = {const: true}];

    // Use requirement_name to specify a JwtRequirement.
    // This requirement_name MUST be specified at the
    // :ref:`requirement_map <envoy_v3_api_field_extensions.filters.http.jwt_authn.v3.JwtAuthentication.requirement_map>`
    // in ``JwtAuthentication``. If no, the requests using this route will be rejected with 403.
    string requirement_name = 2 [(validate.rules).string = {min_len: 1}];
  }
}

// This message specifies a combination of header name and claim name.
message JwtClaimToHeader {
  // The HTTP header name to copy the claim to.
  // The header name will be sanitized and replaced.
  string header_name = 1
      [(validate.rules).string = {min_len: 1 well_known_regex: HTTP_HEADER_NAME strict: false}];

  // The field name for the JWT Claim : it can be a nested claim of type (eg. "claim.nested.key", "sub")
  // String separated with "." in case of nested claims. The nested claim name must use dot "." to separate
  // the JSON name path.
  string claim_name = 2 [(validate.rules).string = {min_len: 1}];
}
