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/* gpgme.js - Javascript integration for gpgme
* Copyright (C) 2018 Bundesamt für Sicherheit in der Informationstechnik
*
* This file is part of GPGME.
*
* GPGME is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* GPGME is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, see <http://www.gnu.org/licenses/>.
* SPDX-License-Identifier: LGPL-2.1+
*/
import { permittedOperations } from './permittedOperations'
import { gpgme_error } from './Errors'
export function createMessage(operation){
if (typeof(operation) !== 'string'){
return gpgme_error('PARAM_WRONG');
}
if (permittedOperations.hasOwnProperty(operation)){
return new GPGME_Message(operation);
} else {
return gpgme_error('MSG_WRONG_OP');
}
}
/**
* Prepares a communication request. It checks operations and parameters in
* ./permittedOperations.
* @param {String} operation
*/
export class GPGME_Message {
//TODO getter
constructor(operation){
this.operation = operation;
}
set operation (op){
if (typeof(op) === "string"){
if (!this._msg){
this._msg = {};
}
if (!this._msg.op & permittedOperations.hasOwnProperty(op)){
this._msg.op = op;
}
}
}
get operation(){
return this._msg.op;
}
/**
* Sets a parameter for the message. Note that the operation has to be set
* first, to be able to check if the parameter is permittted
* @param {String} param Parameter to set
* @param {any} value Value to set //TODO: Some type checking
* @returns {Boolean} If the parameter was set successfully
*/
setParameter(param,value){
if (!param || typeof(param) !== 'string'){
return gpgme_error('PARAM_WRONG');
}
let po = permittedOperations[this._msg.op];
if (!po){
return gpgme_error('MSG_WRONG_OP');
}
let poparam = null;
if (po.required.hasOwnProperty(param)){
poparam = po.required[param];
} else if (po.optional.hasOwnProperty(param)){
poparam = po.optional[param];
} else {
return gpgme_error('PARAM_WRONG');
}
let checktype = function(val){
switch(typeof(val)){
case 'string':
if (poparam.allowed.indexOf(typeof(val)) >= 0
&& val.length > 0) {
return true;
}
return gpgme_error('PARAM_WRONG');
break;
case 'number':
if (
poparam.allowed.indexOf('number') >= 0
&& isNaN(value) === false){
return true;
}
return gpgme_error('PARAM_WRONG');
break;
case 'boolean':
if (poparam.allowed.indexOf('boolean') >= 0){
return true;
}
return gpgme_error('PARAM_WRONG');
break;
case 'object':
if (Array.isArray(val)){
if (poparam.array_allowed !== true){
return gpgme_error('PARAM_WRONG');
}
for (let i=0; i < val.length; i++){
let res = checktype(val[i]);
if (res !== true){
return res;
}
}
if (val.length > 0) {
return true;
}
} else if (val instanceof Uint8Array){
if (poparam.allowed.indexOf('Uint8Array') >= 0){
return true;
}
return gpgme_error('PARAM_WRONG');
} else {
return gpgme_error('PARAM_WRONG');
}
break;
default:
return gpgme_error('PARAM_WRONG');
}
};
let typechecked = checktype(value);
if (typechecked !== true){
return typechecked;
}
if (poparam.hasOwnProperty('allowed_data')){
if (poparam.allowed_data.indexOf(value) < 0){
return gpgme_error('PARAM_WRONG');
}
}
this._msg[param] = value;
return true;
}
/**
* Check if the message has the minimum requirements to be sent, according
* to the definitions in permittedOperations
* @returns {Boolean}
*/
get isComplete(){
if (!this._msg.op){
return false;
}
let reqParams = Object.keys(
permittedOperations[this._msg.op].required);
let msg_params = Object.keys(this._msg);
for (let i=0; i < reqParams.length; i++){
if (msg_params.indexOf(reqParams[i]) < 0){
console.log(reqParams[i] + ' missing');
return false;
}
}
return true;
}
/**
* Returns the prepared message with parameters and completeness checked
* @returns {Object|null} Object to be posted to gnupg, or null if
* incomplete
*/
get message(){
if (this.isComplete === true){
return this._msg;
}
else {
return null;
}
}
}
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