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https://github.com/Ylianst/MeshCommander
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Fixed -kvmdatatrace issue.
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Ylian Saint-Hilaire
205
pki.js/SignedAndUnsignedAttributes.js
Normal file
205
pki.js/SignedAndUnsignedAttributes.js
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@@ -0,0 +1,205 @@
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import * as asn1js from "asn1js";
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import { getParametersValue, clearProps } from "pvutils";
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import Attribute from "./Attribute.js";
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//**************************************************************************************
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/**
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* Class from RFC5652
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*/
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export default class SignedAndUnsignedAttributes
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{
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//**********************************************************************************
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/**
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* Constructor for SignedAndUnsignedAttributes class
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* @param {Object} [parameters={}]
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* @param {Object} [parameters.schema] asn1js parsed value to initialize the class from
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*/
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constructor(parameters = {})
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{
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//region Internal properties of the object
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/**
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* @type {number}
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* @desc type
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*/
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this.type = getParametersValue(parameters, "type", SignedAndUnsignedAttributes.defaultValues("type"));
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/**
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* @type {Array}
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* @desc attributes
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*/
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this.attributes = getParametersValue(parameters, "attributes", SignedAndUnsignedAttributes.defaultValues("attributes"));
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/**
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* @type {ArrayBuffer}
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* @desc encodedValue Need to have it in order to successfully process with signature verification
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*/
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this.encodedValue = getParametersValue(parameters, "encodedValue", SignedAndUnsignedAttributes.defaultValues("encodedValue"));
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//endregion
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//region If input argument array contains "schema" for this object
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if("schema" in parameters)
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this.fromSchema(parameters.schema);
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//endregion
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}
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//**********************************************************************************
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/**
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* Return default values for all class members
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* @param {string} memberName String name for a class member
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*/
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static defaultValues(memberName)
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{
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switch(memberName)
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{
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case "type":
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return (-1);
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case "attributes":
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return [];
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case "encodedValue":
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return new ArrayBuffer(0);
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default:
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throw new Error(`Invalid member name for SignedAndUnsignedAttributes class: ${memberName}`);
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}
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}
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//**********************************************************************************
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/**
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* Compare values with default values for all class members
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* @param {string} memberName String name for a class member
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* @param {*} memberValue Value to compare with default value
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*/
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static compareWithDefault(memberName, memberValue)
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{
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switch(memberName)
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{
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case "type":
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return (memberValue === SignedAndUnsignedAttributes.defaultValues("type"));
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case "attributes":
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return (memberValue.length === 0);
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case "encodedValue":
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return (memberValue.byteLength === 0);
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default:
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throw new Error(`Invalid member name for SignedAndUnsignedAttributes class: ${memberName}`);
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}
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}
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//**********************************************************************************
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/**
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* Return value of pre-defined ASN.1 schema for current class
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*
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* ASN.1 schema:
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* ```asn1
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* SignedAttributes ::= SET SIZE (1..MAX) OF Attribute
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*
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* UnsignedAttributes ::= SET SIZE (1..MAX) OF Attribute
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* ```
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*
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* @param {Object} parameters Input parameters for the schema
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* @returns {Object} asn1js schema object
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*/
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static schema(parameters = {})
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{
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/**
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* @type {Object}
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* @property {string} [blockName]
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* @property {number} [tagNumber]
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* @property {string} [attributes]
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*/
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const names = getParametersValue(parameters, "names", {});
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return (new asn1js.Constructed({
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name: (names.blockName || ""),
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optional: true,
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idBlock: {
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tagClass: 3, // CONTEXT-SPECIFIC
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tagNumber: names.tagNumber // "SignedAttributes" = 0, "UnsignedAttributes" = 1
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},
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value: [
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new asn1js.Repeated({
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name: (names.attributes || ""),
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value: Attribute.schema()
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})
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]
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}));
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}
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//**********************************************************************************
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/**
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* Convert parsed asn1js object into current class
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* @param {!Object} schema
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*/
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fromSchema(schema)
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{
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//region Clear input data first
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clearProps(schema, [
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"attributes"
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]);
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//endregion
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//region Check the schema is valid
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const asn1 = asn1js.compareSchema(schema,
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schema,
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SignedAndUnsignedAttributes.schema({
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names: {
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tagNumber: this.type,
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attributes: "attributes"
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}
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})
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);
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if(asn1.verified === false)
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throw new Error("Object's schema was not verified against input data for SignedAndUnsignedAttributes");
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//endregion
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//region Get internal properties from parsed schema
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this.type = asn1.result.idBlock.tagNumber;
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this.encodedValue = asn1.result.valueBeforeDecode;
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//region Change type from "[0]" to "SET" accordingly to standard
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const encodedView = new Uint8Array(this.encodedValue);
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encodedView[0] = 0x31;
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//endregion
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if(("attributes" in asn1.result) === false)
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{
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if(this.type === 0)
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throw new Error("Wrong structure of SignedUnsignedAttributes");
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else
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return; // Not so important in case of "UnsignedAttributes"
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}
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this.attributes = Array.from(asn1.result.attributes, element => new Attribute({ schema: element }));
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//endregion
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}
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//**********************************************************************************
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/**
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* Convert current object to asn1js object and set correct values
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* @returns {Object} asn1js object
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*/
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toSchema()
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{
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if(SignedAndUnsignedAttributes.compareWithDefault("type", this.type) || SignedAndUnsignedAttributes.compareWithDefault("attributes", this.attributes))
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throw new Error("Incorrectly initialized \"SignedAndUnsignedAttributes\" class");
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//region Construct and return new ASN.1 schema for this object
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return (new asn1js.Constructed({
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optional: true,
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idBlock: {
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tagClass: 3, // CONTEXT-SPECIFIC
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tagNumber: this.type // "SignedAttributes" = 0, "UnsignedAttributes" = 1
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},
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value: Array.from(this.attributes, element => element.toSchema())
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}));
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//endregion
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}
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//**********************************************************************************
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/**
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* Convertion for the class to JSON object
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* @returns {Object}
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*/
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toJSON()
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{
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if(SignedAndUnsignedAttributes.compareWithDefault("type", this.type) || SignedAndUnsignedAttributes.compareWithDefault("attributes", this.attributes))
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throw new Error("Incorrectly initialized \"SignedAndUnsignedAttributes\" class");
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return {
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type: this.type,
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attributes: Array.from(this.attributes, element => element.toJSON())
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};
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}
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//**********************************************************************************
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}
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//**************************************************************************************
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