// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0

syntax = "proto3";

package controller.api.services.v1;

import "controller/api/resources/authmethods/v1/auth_method.proto";
import "controller/api/resources/authtokens/v1/authtoken.proto";
import "controller/custom_options/v1/options.proto";
import "google/api/annotations.proto";
import "google/api/visibility.proto";
import "google/protobuf/field_mask.proto";
import "google/protobuf/struct.proto";
import "protoc-gen-openapiv2/options/annotations.proto";

option go_package = "github.com/hashicorp/boundary/internal/gen/controller/api/services;services";
option (custom_options.v1.domain) = "auth";

service AuthMethodService {
  option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_tag) = {
    name: "Auth method service"
    description:
      "The auth method service exposes endpoints for interacting with auth methods in Boundary. "
      "An auth method defines how users can authenticate themselves within the system. "
      "It acts as a bridge between Boundary and various external identity providers or authentication mechanisms."
    external_docs: {
      url: "https://developer.hashicorp.com/boundary/docs/concepts/domain-model/auth-methods";
      description: "Read about auth methods in the Boundary domain model";
    }
  };
  // GetAuthMethod returns a stored auth method if present.  The provided request
  // must include the auth method id. If missing, malformed or referencing a
  // non existing resource an error is returned.
  rpc GetAuthMethod(GetAuthMethodRequest) returns (GetAuthMethodResponse) {
    option (google.api.http) = {
      get: "/v1/auth-methods/{id}"
      response_body: "item"
    };
    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {summary: "Gets a single auth method."};
  }

  // ListAuthMethods returns a list of stored auth methods which are in the
  // provided scope. The request must include the scope ID and if missing,
  // malformed, or referencing a non existing scope, an error is returned.
  rpc ListAuthMethods(ListAuthMethodsRequest) returns (ListAuthMethodsResponse) {
    option (google.api.http) = {get: "/v1/auth-methods"};
    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {summary: "Lists all auth methods."};
  }

  // CreateAuthMethod creates and stores an auth method in Boundary.  The
  // provided request must include the scope in which the auth method will be
  // created. If the scope ID is missing, malformed or referencing a
  // non existing resource an error is returned.  If a name is provided that is
  // in use in another auth method in the same scope, an error is returned.
  rpc CreateAuthMethod(CreateAuthMethodRequest) returns (CreateAuthMethodResponse) {
    option (google.api.http) = {
      post: "/v1/auth-methods"
      body: "item"
      response_body: "item"
    };
    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {summary: "Creates a single auth method."};
  }

  // UpdateAuthMethod updates an existing auth method in Boundary.  The provided
  // auth method must not have any read only fields set.  The update mask must be
  // included in the request and contain at least 1 mutable field.  To unset
  // a field's value, include the field in the update mask and don't set it
  // in the provided user. An error is returned if the auth method ID is missing
  // or reference a non existing resource.  An error is also returned if the
  // request attempts to update the name to one that is already in use by
  // another auth method in the parent scope.
  rpc UpdateAuthMethod(UpdateAuthMethodRequest) returns (UpdateAuthMethodResponse) {
    option (google.api.http) = {
      patch: "/v1/auth-methods/{id}"
      body: "item"
      response_body: "item"
    };
    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {summary: "Updates an auth method."};
  }

  // DeleteAuthMethod removes an auth method from Boundary. If the auth method id
  // is malformed or not provided an error is returned.
  rpc DeleteAuthMethod(DeleteAuthMethodRequest) returns (DeleteAuthMethodResponse) {
    option (google.api.http) = {delete: "/v1/auth-methods/{id}"};
    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {summary: "Deletes an AuthMethod"};
  }

  // ChangeState changes the state of an auth method from Boundary.
  rpc ChangeState(ChangeStateRequest) returns (ChangeStateResponse) {
    option (google.api.http) = {
      post: "/v1/auth-methods/{id}:change-state"
      body: "*"
      response_body: "item"
    };
    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {summary: "Changes the state of an OIDC AuthMethod"};
  }

  // Authenticate validates credentials provided and returns an Auth Token.
  rpc Authenticate(AuthenticateRequest) returns (AuthenticateResponse) {
    option (google.api.http) = {
      post: "/v1/auth-methods/{auth_method_id}:authenticate"
      body: "*"
    };
    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {summary: "Authenticate a user to an scope and retrieve an authentication token."};
  }
}

message GetAuthMethodRequest {
  // ID of the auth method being requested.
  string id = 1; // @gotags: `class:"public" eventstream:"observation"`
}

message GetAuthMethodResponse {
  resources.authmethods.v1.AuthMethod item = 1;
}

message ListAuthMethodsRequest {
  // The scope ID in which to list auth methods.
  string scope_id = 1 [json_name = "scope_id"]; // @gotags: `class:"public" eventstream:"observation"`
  // Whether to recursively list auth methods in the provided scope's child scopes.
  bool recursive = 20 [json_name = "recursive"]; // @gotags: `class:"public" eventstream:"observation"`
  // You can specify that the filter should only return items that match.
  // Refer to [filter expressions](https://developer.hashicorp.com/boundary/docs/concepts/filtering) for more information.
  string filter = 30 [json_name = "filter"]; // @gotags: `class:"public"`
  // An opaque token that Boundary uses to continue an existing iteration or
  // request updated items. If you do not specify a token, pagination
  // starts from the beginning. To learn more about list pagination
  // in Boundary, refer to [list pagination](https://developer.hashicorp.com/boundary/docs/api-clients/api/pagination).
  string list_token = 40 [json_name = "list_token"]; // @gotags: `class:"public"`
  // The maximum size of a page in this iteration.
  // If you do not set a page size, Boundary uses the configured default page size.
  // If the page_size is greater than the default page size configured,
  // Boundary truncates the page size to this number.
  uint32 page_size = 50 [json_name = "page_size"]; // @gotags: `class:"public"`
}

message ListAuthMethodsResponse {
  // The items returned in this page.
  repeated resources.authmethods.v1.AuthMethod items = 1;
  // The type of response, either "delta" or "complete".
  // Delta signifies that this is part of a paginated result
  // or an update to a previously completed pagination.
  // Complete signifies that it is the last page.
  string response_type = 2 [json_name = "response_type"]; // @gotags: `class:"public"`
  // An opaque token used to continue an existing pagination or
  // request updated items. Use this token in the next list request
  // to request the next page.
  string list_token = 3 [json_name = "list_token"]; // @gotags: `class:"public"`
  // The name of the field which the items are sorted by.
  string sort_by = 4 [json_name = "sort_by"]; // @gotags: `class:"public"`
  // The direction of the sort, either "asc" or "desc".
  string sort_dir = 5 [json_name = "sort_dir"]; // @gotags: `class:"public"`
  // A list of item IDs that have been removed since they were returned
  // as part of a pagination. They should be dropped from any client cache.
  // This may contain items that are not known to the cache, if they were
  // created and deleted between listings.
  repeated string removed_ids = 6 [json_name = "removed_ids"]; // @gotags: `class:"public"`
  // An estimate at the total items available. This may change during pagination.
  uint32 est_item_count = 7 [json_name = "est_item_count"]; // @gotags: `class:"public"`
}

message CreateAuthMethodRequest {
  resources.authmethods.v1.AuthMethod item = 1;
}

message CreateAuthMethodResponse {
  string uri = 1; // @gotags: `class:"public" eventstream:"observation"`
  resources.authmethods.v1.AuthMethod item = 2;
}

message UpdateAuthMethodRequest {
  // The ID of the auth method that should be updated
  string id = 1; // @gotags: `class:"public" eventstream:"observation"`
  // A subset of the auth method containing the fields to update.
  resources.authmethods.v1.AuthMethod item = 2;
  google.protobuf.FieldMask update_mask = 3 [json_name = "update_mask"];
}

message UpdateAuthMethodResponse {
  resources.authmethods.v1.AuthMethod item = 1;
}

message DeleteAuthMethodRequest {
  // The ID of the auth method to delete.
  string id = 1; // @gotags: `class:"public" eventstream:"observation"`
}

message DeleteAuthMethodResponse {}

// Attributes specific to changing the state of an OIDC auth method.
message OidcChangeStateAttributes {
  // state must be `inactive`, `active-private`, or `active-public`
  string state = 1; // @gotags: `class:"public"`
  // This flag is only useful for an OIDC auth method. It should not be used
  // unless the OIDC provider's config is incorrectly set and is stopping the
  // activation of this auth method.
  bool disable_discovered_config_validation = 2 [json_name = "disable_discovered_config_validation"]; // @gotags: `class:"public"`
}

message ChangeStateRequest {
  string id = 1; // @gotags: `class:"public"`
  // Version is used to ensure this resource has not changed.
  // The mutation will fail if the version does not match the latest known good version.
  uint32 version = 2; // @gotags: `class:"public"`

  oneof attrs {
    // The attributes specific to this auth method's state.
    google.protobuf.Struct attributes = 4 [
      (custom_options.v1.subtype) = "default",
      (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_field) = {
        example: "{\"state\": \"active-public\", \"disable_discovered_config_validation\": false}",
        description:
          "The attributes that are applicable for the specific auth method type. "
          "The schema of this field depends on the type of the auth method. "
          "The only supported auth method type is OIDC.\n"
          "For OIDC auth methods, the parameters are:\n"
          "```json\n"
          "{\n"
          "  \"state\": \"active-public\",\n"
          "  \"disable_discovered_config_validation\": false\n"
          "}\n"
          "```\n"
      }
    ];
    OidcChangeStateAttributes oidc_change_state_attributes = 5 [
      (custom_options.v1.subtype) = "oidc",
      (google.api.field_visibility).restriction = "INTERNAL"
    ];
  }
}

message ChangeStateResponse {
  resources.authmethods.v1.AuthMethod item = 1;
}

// The layout of the struct for "attributes" field in AuthenticateRequest for a password type.
// This message isn't directly referenced anywhere but is used here to define the expected
// field names and types.
message PasswordLoginAttributes {
  string login_name = 1 [json_name = "login_name"]; // @gotags: `class:"sensitive"`
  string password = 2; // @gotags: `class:"secret"`
}

// The layout of the struct for "attributes" field in AuthenticateRequest for a OIDC type's start command. This message isn't directly referenced anywhere but is used here to define the expected field
// names and types.
message OidcStartAttributes {
  // An object which will be marshaled as JSON and roundtripped in the token command call.
  google.protobuf.Struct roundtrip_payload = 1 [json_name = "roundtrip_payload"];
  // Cached marshaled payload. This is not ingressed from the client; anything found will be thrown out.
  string cached_roundtrip_payload = 2; // @gotags: `class:"sensitive"`
}

// The layout of the struct for "attributes" field in AuthenticateRequest for an
// ldap type. This message isn't directly referenced anywhere but is used here
// to define the expected field names and types.
message LdapLoginAttributes {
  string login_name = 10 [json_name = "login_name"]; // @gotags: `class:"sensitive"`
  string password = 20; // @gotags: `class:"secret"`
}

message AuthenticateRequest {
  // The ID of the auth method in the system that should be used for authentication.
  string auth_method_id = 1 [json_name = "auth_method_id"]; // @gotags: `class:"public" eventstream:"observation"`
  // This can be "cookie" or "token". If not provided, "token" will be used. "cookie" activates a split-cookie method where the token is split partially between http-only and regular cookies in order
  // to keep it safe from rogue JS in the browser. Deprecated, use "type" instead.
  string token_type = 2 [
    json_name = "token_type",
    deprecated = true
  ]; // @gotags: `class:"public"`
  // This can be "cookie" or "token". If not provided, "token" will be used. "cookie" activates a split-cookie method where the token is split partially between http-only and regular cookies in order
  // to keep it safe from rogue JS in the browser.
  string type = 6 [json_name = "type"]; // @gotags: `class:"public" eventstream:"observation"`
  oneof attrs {
    // Attributes are passed to the auth method. The valid keys and values depend on the type of auth method as well as the command.
    google.protobuf.Struct attributes = 4 [
      json_name = "attributes",
      (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_field) = {
        example: "{\"login\": \"login\", \"password\": \"password\"}",
        description:
          "The attributes that are used to authenticate to the auth method. "
          "The schema of this field depends on the type of the auth method. "
          "For password auth methods, the parameters are:\n"
          "```json\n"
          "{\n"
          "  \"login_name\": \"login_name\",\n"
          "  \"password\": \"password\"\n"
          "}\n"
          "```\n"
          "For LDAP auth methods, the parameters are:\n"
          "```json\n"
          "{\n"
          "  \"login_name\": \"login_name\",\n"
          "  \"password\": \"password\"\n"
          "}\n"
          "```\n"
          "For OIDC auth methods, the parameters are:\n"
          "```json\n"
          "{\n"
          "  \"roundtrip_payload\": {}\n"
          "}\n"
          "```\n"
          "OIDC authentication requires multiple calls to this endpoint. "
          "After the initial call and successful authentication, the OIDC "
          "provider must redirect the user to the `callback` command:\n"
          "```json\n"
          "{\n"
          "  \"code\": \"code\",\n"
          "  \"state\": \"state\",\n"
          "  \"error\": \"error\",\n"
          "  \"error_description\": \"error_description\",\n"
          "  \"error_uri\": \"error_uri\"\n"
          "}\n"
          "```\n"
          "Once this has succeded, the issued auth token can be retrieved by using the `token` command:\n"
          "```json\n"
          "{\n"
          "  \"token_id\": \"token_id_from_initial_response\"\n"
          "}\n"
          "```\n"
      }
    ];
    // Note: these fields have a custom mapping function for transforming to and from the generic attributes,
    // they do not use the standard attribute transformation.
    PasswordLoginAttributes password_login_attributes = 7 [(google.api.field_visibility).restriction = "INTERNAL"];
    OidcStartAttributes oidc_start_attributes = 8 [(google.api.field_visibility).restriction = "INTERNAL"];
    controller.api.resources.authmethods.v1.OidcAuthMethodAuthenticateCallbackRequest oidc_auth_method_authenticate_callback_request = 9 [(google.api.field_visibility).restriction = "INTERNAL"];
    controller.api.resources.authmethods.v1.OidcAuthMethodAuthenticateTokenRequest oidc_auth_method_authenticate_token_request = 10 [(google.api.field_visibility).restriction = "INTERNAL"];
    LdapLoginAttributes ldap_login_attributes = 11 [(google.api.field_visibility).restriction = "INTERNAL"];
  }
  // The command to perform. One of "login", "callback", or "token".
  string command = 5 [json_name = "command"]; // @gotags: `class:"public"`

  // Deprecated fields
  reserved "credentials";
  reserved 3;
}

message AuthenticateResponse {
  reserved 1, 2; // Old item and token_type
  reserved "item", "token_type";
  // The type of the token returned. Either "cookie" or "token".
  string type = 3; // @gotags: `class:"public" eventstream:"observation"`
  oneof attrs {
    // Valid keys and values depend on the type of auth method as well as the command.
    google.protobuf.Struct attributes = 4 [
      json_name = "attributes",
      (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_field) = {
        example: "{\"login\": \"login\", \"password\": \"password\"}",
        description:
          "The response attributes that are used to authenticate to the auth method. "
          "The schema of this field depends on the type of the auth method. "
          "For password, OIDC and LDAP auth methods, the response is an auth token:\n"
          "```json\n"
          "{\n"
          "  \"id\": \"token_id\",\n"
          "  \"scope_id\": \"scope_id\",\n"
          "  \"token\": \"token_string\",\n"
          "  \"user_id\": \"user_id\",\n"
          "  \"auth_method_id\": \"auth_method_id\",\n"
          "  \"account_id\": \"account_id\",\n"
          "  \"created_time\": \"token_created_time\",\n"
          "  \"updated_time\": \"token_updated_time\",\n"
          "  \"approximate_last_used_time\": \"token_approximate_last_used_time\",\n"
          "  \"expiration_time\": \"token_expiration_time\"\n"
          "}\n"
          "```\n"
          "For OIDC auth methods, the initial parameters are:\n"
          "```json\n"
          "{\n"
          "  \"auth_url\": \"OIDC_auth_url\",\n"
          "  \"token_id\": \"OIDC_token_id\"\n"
          "}\n"
          "```\n"
          "The `auth_url` is the URL that authenticating user should open "
          "in the browser to authenticate with the OIDC provider. "
          "The `token_id` should be used in subsequent calls to the `authenticate` endpoint "
          "to retrieve the auth token.\n"
      }
    ];
    // Note: these fields have a custom mapping function for transforming to and from the generic attributes,
    // they do not use the standard attribute transformation.
    controller.api.resources.authmethods.v1.OidcAuthMethodAuthenticateStartResponse oidc_auth_method_authenticate_start_response = 6 [(google.api.field_visibility).restriction = "INTERNAL"];
    controller.api.resources.authmethods.v1.OidcAuthMethodAuthenticateCallbackResponse oidc_auth_method_authenticate_callback_response = 7 [(google.api.field_visibility).restriction = "INTERNAL"];
    controller.api.resources.authmethods.v1.OidcAuthMethodAuthenticateTokenResponse oidc_auth_method_authenticate_token_response = 8 [(google.api.field_visibility).restriction = "INTERNAL"];
    controller.api.resources.authtokens.v1.AuthToken auth_token_response = 9 [(google.api.field_visibility).restriction = "INTERNAL"];
  }
  // The command that was performed.
  string command = 5 [json_name = "command"]; // @gotags: `class:"public"`
}