// Copyright 2025 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

syntax = "proto3";

package google.iam.v1;

import "google/api/annotations.proto";
import "google/api/client.proto";
import "google/api/field_behavior.proto";
import "google/api/resource.proto";
import "google/iam/v1/options.proto";
import "google/iam/v1/policy.proto";
import "google/protobuf/field_mask.proto";

option csharp_namespace = "Google.Cloud.Iam.V1";
option go_package = "cloud.google.com/go/iam/apiv1/iampb;iampb";
option java_multiple_files = true;
option java_outer_classname = "IamPolicyProto";
option java_package = "com.google.iam.v1";
option php_namespace = "Google\\Cloud\\Iam\\V1";

// API Overview
//
// Manages Identity and Access Management (IAM) policies.
//
// Any implementation of an API that offers access control features
// implements the google.iam.v1.IAMPolicy interface.
//
// ## Data model
//
// Access control is applied when a principal (user or service account), takes
// some action on a resource exposed by a service. Resources, identified by
// URI-like names, are the unit of access control specification. Service
// implementations can choose the granularity of access control and the
// supported permissions for their resources.
// For example one database service may allow access control to be
// specified only at the Table level, whereas another might allow access control
// to also be specified at the Column level.
//
// ## Policy Structure
//
// See google.iam.v1.Policy
//
// This is intentionally not a CRUD style API because access control policies
// are created and deleted implicitly with the resources to which they are
// attached.
service IAMPolicy {
  option (google.api.default_host) = "iam-meta-api.googleapis.com";

  // Sets the access control policy on the specified resource. Replaces any
  // existing policy.
  //
  // Can return `NOT_FOUND`, `INVALID_ARGUMENT`, and `PERMISSION_DENIED` errors.
  rpc SetIamPolicy(SetIamPolicyRequest) returns (Policy) {
    option (google.api.http) = {
      post: "/v1/{resource=**}:setIamPolicy"
      body: "*"
    };
  }

  // Gets the access control policy for a resource.
  // Returns an empty policy if the resource exists and does not have a policy
  // set.
  rpc GetIamPolicy(GetIamPolicyRequest) returns (Policy) {
    option (google.api.http) = {
      post: "/v1/{resource=**}:getIamPolicy"
      body: "*"
    };
  }

  // Returns permissions that a caller has on the specified resource.
  // If the resource does not exist, this will return an empty set of
  // permissions, not a `NOT_FOUND` error.
  //
  // Note: This operation is designed to be used for building permission-aware
  // UIs and command-line tools, not for authorization checking. This operation
  // may "fail open" without warning.
  rpc TestIamPermissions(TestIamPermissionsRequest)
      returns (TestIamPermissionsResponse) {
    option (google.api.http) = {
      post: "/v1/{resource=**}:testIamPermissions"
      body: "*"
    };
  }
}

// Request message for `SetIamPolicy` method.
message SetIamPolicyRequest {
  // REQUIRED: The resource for which the policy is being specified.
  // See the operation documentation for the appropriate value for this field.
  string resource = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference).type = "*"
  ];

  // REQUIRED: The complete policy to be applied to the `resource`. The size of
  // the policy is limited to a few 10s of KB. An empty policy is a
  // valid policy but certain Cloud Platform services (such as Projects)
  // might reject them.
  Policy policy = 2 [(google.api.field_behavior) = REQUIRED];

  // OPTIONAL: A FieldMask specifying which fields of the policy to modify. Only
  // the fields in the mask will be modified. If no mask is provided, the
  // following default mask is used:
  //
  // `paths: "bindings, etag"`
  google.protobuf.FieldMask update_mask = 3;
}

// Request message for `GetIamPolicy` method.
message GetIamPolicyRequest {
  // REQUIRED: The resource for which the policy is being requested.
  // See the operation documentation for the appropriate value for this field.
  string resource = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference).type = "*"
  ];

  // OPTIONAL: A `GetPolicyOptions` object for specifying options to
  // `GetIamPolicy`.
  GetPolicyOptions options = 2;
}

// Request message for `TestIamPermissions` method.
message TestIamPermissionsRequest {
  // REQUIRED: The resource for which the policy detail is being requested.
  // See the operation documentation for the appropriate value for this field.
  string resource = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference).type = "*"
  ];

  // The set of permissions to check for the `resource`. Permissions with
  // wildcards (such as '*' or 'storage.*') are not allowed. For more
  // information see
  // [IAM Overview](https://cloud.google.com/iam/docs/overview#permissions).
  repeated string permissions = 2 [(google.api.field_behavior) = REQUIRED];
}

// Response message for `TestIamPermissions` method.
message TestIamPermissionsResponse {
  // A subset of `TestPermissionsRequest.permissions` that the caller is
  // allowed.
  repeated string permissions = 1;
}
