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envoy.config.rbac.v2.rbac.proto Maven / Gradle / Ivy

syntax = "proto3";

package envoy.config.rbac.v2;

import "envoy/api/v2/core/address.proto";
import "envoy/api/v2/route/route_components.proto";
import "envoy/type/matcher/metadata.proto";
import "envoy/type/matcher/path.proto";
import "envoy/type/matcher/string.proto";

import "google/api/expr/v1alpha1/syntax.proto";

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

option java_package = "io.envoyproxy.envoy.config.rbac.v2";
option java_outer_classname = "RbacProto";
option java_multiple_files = true;
option go_package = "github.com/envoyproxy/go-control-plane/envoy/config/rbac/v2;rbacv2";
option (udpa.annotations.file_status).package_version_status = FROZEN;

// [#protodoc-title: Role Based Access Control (RBAC)]

// Role Based Access Control (RBAC) provides service-level and method-level access control for a
// service. RBAC policies are additive. The policies are examined in order. A request is allowed
// once a matching policy is found (suppose the `action` is ALLOW).
//
// Here is an example of RBAC configuration. It has two policies:
//
// * Service account "cluster.local/ns/default/sa/admin" has full access to the service, and so
//   does "cluster.local/ns/default/sa/superuser".
//
// * Any user can read ("GET") the service at paths with prefix "/products", so long as the
//   destination port is either 80 or 443.
//
//  .. code-block:: yaml
//
//   action: ALLOW
//   policies:
//     "service-admin":
//       permissions:
//         - any: true
//       principals:
//         - authenticated:
//             principal_name:
//               exact: "cluster.local/ns/default/sa/admin"
//         - authenticated:
//             principal_name:
//               exact: "cluster.local/ns/default/sa/superuser"
//     "product-viewer":
//       permissions:
//           - and_rules:
//               rules:
//                 - header: { name: ":method", exact_match: "GET" }
//                 - url_path:
//                     path: { prefix: "/products" }
//                 - or_rules:
//                     rules:
//                       - destination_port: 80
//                       - destination_port: 443
//       principals:
//         - any: true
//
message RBAC {
  // Should we do safe-list or block-list style access control?
  enum Action {
    // The policies grant access to principals. The rest is denied. This is safe-list style
    // access control. This is the default type.
    ALLOW = 0;

    // The policies deny access to principals. The rest is allowed. This is block-list style
    // access control.
    DENY = 1;
  }

  // The action to take if a policy matches. The request is allowed if and only if:
  //
  //   * `action` is "ALLOWED" and at least one policy matches
  //   * `action` is "DENY" and none of the policies match
  Action action = 1;

  // Maps from policy name to policy. A match occurs when at least one policy matches the request.
  map policies = 2;
}

// Policy specifies a role and the principals that are assigned/denied the role. A policy matches if
// and only if at least one of its permissions match the action taking place AND at least one of its
// principals match the downstream AND the condition is true if specified.
message Policy {
  // Required. The set of permissions that define a role. Each permission is matched with OR
  // semantics. To match all actions for this policy, a single Permission with the `any` field set
  // to true should be used.
  repeated Permission permissions = 1 [(validate.rules).repeated = {min_items: 1}];

  // Required. The set of principals that are assigned/denied the role based on “action”. Each
  // principal is matched with OR semantics. To match all downstreams for this policy, a single
  // Principal with the `any` field set to true should be used.
  repeated Principal principals = 2 [(validate.rules).repeated = {min_items: 1}];

  // An optional symbolic expression specifying an access control
  // :ref:`condition `. The condition is combined
  // with the permissions and the principals as a clause with AND semantics.
  google.api.expr.v1alpha1.Expr condition = 3;
}

// Permission defines an action (or actions) that a principal can take.
// [#next-free-field: 11]
message Permission {
  // Used in the `and_rules` and `or_rules` fields in the `rule` oneof. Depending on the context,
  // each are applied with the associated behavior.
  message Set {
    repeated Permission rules = 1 [(validate.rules).repeated = {min_items: 1}];
  }

  oneof rule {
    option (validate.required) = true;

    // A set of rules that all must match in order to define the action.
    Set and_rules = 1;

    // A set of rules where at least one must match in order to define the action.
    Set or_rules = 2;

    // When any is set, it matches any action.
    bool any = 3 [(validate.rules).bool = {const: true}];

    // A header (or pseudo-header such as :path or :method) on the incoming HTTP request. Only
    // available for HTTP request.
    // Note: the pseudo-header :path includes the query and fragment string. Use the `url_path`
    // field if you want to match the URL path without the query and fragment string.
    api.v2.route.HeaderMatcher header = 4;

    // A URL path on the incoming HTTP request. Only available for HTTP.
    type.matcher.PathMatcher url_path = 10;

    // A CIDR block that describes the destination IP.
    api.v2.core.CidrRange destination_ip = 5;

    // A port number that describes the destination port connecting to.
    uint32 destination_port = 6 [(validate.rules).uint32 = {lte: 65535}];

    // Metadata that describes additional information about the action.
    type.matcher.MetadataMatcher metadata = 7;

    // Negates matching the provided permission. For instance, if the value of `not_rule` would
    // match, this permission would not match. Conversely, if the value of `not_rule` would not
    // match, this permission would match.
    Permission not_rule = 8;

    // The request server from the client's connection request. This is
    // typically TLS SNI.
    //
    // .. attention::
    //
    //   The behavior of this field may be affected by how Envoy is configured
    //   as explained below.
    //
    //   * If the :ref:`TLS Inspector `
    //     filter is not added, and if a `FilterChainMatch` is not defined for
    //     the :ref:`server name `,
    //     a TLS connection's requested SNI server name will be treated as if it
    //     wasn't present.
    //
    //   * A :ref:`listener filter ` may
    //     overwrite a connection's requested server name within Envoy.
    //
    // Please refer to :ref:`this FAQ entry ` to learn to
    // setup SNI.
    type.matcher.StringMatcher requested_server_name = 9;
  }
}

// Principal defines an identity or a group of identities for a downstream subject.
// [#next-free-field: 12]
message Principal {
  // Used in the `and_ids` and `or_ids` fields in the `identifier` oneof. Depending on the context,
  // each are applied with the associated behavior.
  message Set {
    repeated Principal ids = 1 [(validate.rules).repeated = {min_items: 1}];
  }

  // Authentication attributes for a downstream.
  message Authenticated {
    reserved 1;

    // The name of the principal. If set, The URI SAN or DNS SAN in that order is used from the
    // certificate, otherwise the subject field is used. If unset, it applies to any user that is
    // authenticated.
    type.matcher.StringMatcher principal_name = 2;
  }

  oneof identifier {
    option (validate.required) = true;

    // A set of identifiers that all must match in order to define the downstream.
    Set and_ids = 1;

    // A set of identifiers at least one must match in order to define the downstream.
    Set or_ids = 2;

    // When any is set, it matches any downstream.
    bool any = 3 [(validate.rules).bool = {const: true}];

    // Authenticated attributes that identify the downstream.
    Authenticated authenticated = 4;

    // A CIDR block that describes the downstream IP.
    // This address will honor proxy protocol, but will not honor XFF.
    api.v2.core.CidrRange source_ip = 5 [deprecated = true];

    // A CIDR block that describes the downstream remote/origin address.
    // Note: This is always the physical peer even if the
    // :ref:`remote_ip ` is inferred
    // from for example the x-forwarder-for header, proxy protocol, etc.
    api.v2.core.CidrRange direct_remote_ip = 10;

    // A CIDR block that describes the downstream remote/origin address.
    // Note: This may not be the physical peer and could be different from the
    // :ref:`direct_remote_ip `.
    // E.g, if the remote ip is inferred from for example the x-forwarder-for header,
    // proxy protocol, etc.
    api.v2.core.CidrRange remote_ip = 11;

    // A header (or pseudo-header such as :path or :method) on the incoming HTTP request. Only
    // available for HTTP request.
    // Note: the pseudo-header :path includes the query and fragment string. Use the `url_path`
    // field if you want to match the URL path without the query and fragment string.
    api.v2.route.HeaderMatcher header = 6;

    // A URL path on the incoming HTTP request. Only available for HTTP.
    type.matcher.PathMatcher url_path = 9;

    // Metadata that describes additional information about the principal.
    type.matcher.MetadataMatcher metadata = 7;

    // Negates matching the provided principal. For instance, if the value of `not_id` would match,
    // this principal would not match. Conversely, if the value of `not_id` would not match, this
    // principal would match.
    Principal not_id = 8;
  }
}