src/ECCCMSSharedInfo.js

import * as asn1js from "asn1js";
import { getParametersValue, clearProps } from "pvutils";
import AlgorithmIdentifier from "./AlgorithmIdentifier.js";
//**************************************************************************************
/**
 * Class from RFC6318
 */
export default class ECCCMSSharedInfo
{
	//**********************************************************************************
	/**
	 * Constructor for ECCCMSSharedInfo class
	 * @param {Object} [parameters={}]
	 * @property {Object} [schema] asn1js parsed value
	 */
	constructor(parameters = {})
	{
		//region Internal properties of the object
		/**
		 * @type {AlgorithmIdentifier}
		 * @description keyInfo
		 */
		this.keyInfo = getParametersValue(parameters, "keyInfo", ECCCMSSharedInfo.defaultValues("keyInfo"));

		if("entityUInfo" in parameters)
			/**
			 * @type {OctetString}
			 * @description entityUInfo
			 */
			this.entityUInfo = getParametersValue(parameters, "entityUInfo", ECCCMSSharedInfo.defaultValues("entityUInfo"));

		/**
		 * @type {OctetString}
		 * @description suppPubInfo
		 */
		this.suppPubInfo = getParametersValue(parameters, "suppPubInfo", ECCCMSSharedInfo.defaultValues("suppPubInfo"));
		//endregion

		//region If input argument array contains "schema" for this object
		if("schema" in parameters)
			this.fromSchema(parameters.schema);
		//endregion
	}
	//**********************************************************************************
	/**
	 * Return default values for all class members
	 * @param {string} memberName String name for a class member
	 */
	static defaultValues(memberName)
	{
		switch(memberName)
		{
			case "keyInfo":
				return new AlgorithmIdentifier();
			case "entityUInfo":
				return new asn1js.OctetString();
			case "suppPubInfo":
				return new asn1js.OctetString();
			default:
				throw new Error(`Invalid member name for ECCCMSSharedInfo class: ${memberName}`);
		}
	}
	//**********************************************************************************
	/**
	 * Compare values with default values for all class members
	 * @param {string} memberName String name for a class member
	 * @param {*} memberValue Value to compare with default value
	 */
	static compareWithDefault(memberName, memberValue)
	{
		switch(memberName)
		{
			case "keyInfo":
			case "entityUInfo":
			case "suppPubInfo":
				return (memberValue.isEqual(ECCCMSSharedInfo.defaultValues(memberName)));
			default:
				throw new Error(`Invalid member name for ECCCMSSharedInfo class: ${memberName}`);
		}
	}
	//**********************************************************************************
	/**
	 * Return value of asn1js schema for current class
	 * @param {Object} parameters Input parameters for the schema
	 * @returns {Object} asn1js schema object
	 */
	static schema(parameters = {})
	{
		//ECC-CMS-SharedInfo  ::=  SEQUENCE {
		//    keyInfo      AlgorithmIdentifier,
		//    entityUInfo  [0] EXPLICIT OCTET STRING OPTIONAL,
		//    suppPubInfo  [2] EXPLICIT OCTET STRING }

		/**
		 * @type {Object}
		 * @property {string} [blockName]
		 * @property {string} [keyInfo]
		 * @property {string} [entityUInfo]
		 * @property {string} [suppPubInfo]
		 */
		const names = getParametersValue(parameters, "names", {});

		return (new asn1js.Sequence({
			name: (names.blockName || ""),
			value: [
				AlgorithmIdentifier.schema(names.keyInfo || {}),
				new asn1js.Constructed({
					name: (names.entityUInfo || ""),
					idBlock: {
						tagClass: 3, // CONTEXT-SPECIFIC
						tagNumber: 0 // [0]
					},
					optional: true,
					value: [new asn1js.OctetString()]
				}),
				new asn1js.Constructed({
					name: (names.suppPubInfo || ""),
					idBlock: {
						tagClass: 3, // CONTEXT-SPECIFIC
						tagNumber: 2 // [2]
					},
					value: [new asn1js.OctetString()]
				})
			]
		}));
	}
	//**********************************************************************************
	/**
	 * Convert parsed asn1js object into current class
	 * @param {!Object} schema
	 */
	fromSchema(schema)
	{
		//region Clear input data first
		clearProps(schema, [
			"keyInfo",
			"entityUInfo",
			"suppPubInfo"
		]);
		//endregion
		
		//region Check the schema is valid
		const asn1 = asn1js.compareSchema(schema,
			schema,
			ECCCMSSharedInfo.schema({
				names: {
					keyInfo: {
						names: {
							blockName: "keyInfo"
						}
					},
					entityUInfo: "entityUInfo",
					suppPubInfo: "suppPubInfo"
				}
			})
		);

		if(asn1.verified === false)
			throw new Error("Object's schema was not verified against input data for ECCCMSSharedInfo");
		//endregion

		//region Get internal properties from parsed schema
		this.keyInfo = new AlgorithmIdentifier({ schema: asn1.result.keyInfo });

		if("entityUInfo" in asn1.result)
			this.entityUInfo = asn1.result.entityUInfo.valueBlock.value[0];

		this.suppPubInfo = asn1.result.suppPubInfo.valueBlock.value[0];
		//endregion
	}
	//**********************************************************************************
	/**
	 * Convert current object to asn1js object and set correct values
	 * @returns {Object} asn1js object
	 */
	toSchema()
	{
		//region Create output array for sequence 
		const outputArray = [];
		
		outputArray.push(this.keyInfo.toSchema());
		
		if("entityUInfo" in this)
		{
			outputArray.push(new asn1js.Constructed({
				idBlock: {
					tagClass: 3, // CONTEXT-SPECIFIC
					tagNumber: 0 // [0]
				},
				value: [this.entityUInfo]
			}));
		}
		
		outputArray.push(new asn1js.Constructed({
			idBlock: {
				tagClass: 3, // CONTEXT-SPECIFIC
				tagNumber: 2 // [2]
			},
			value: [this.suppPubInfo]
		}));
		//endregion 
		
		//region Construct and return new ASN.1 schema for this object 
		return new asn1js.Sequence({
			value: outputArray
		});
		//endregion 
	}
	//**********************************************************************************
	/**
	 * Convertion for the class to JSON object
	 * @returns {Object}
	 */
	toJSON()
	{
		const _object = {
			keyInfo: this.keyInfo.toJSON()
		};

		if("entityUInfo" in this)
			_object.entityUInfo = this.entityUInfo.toJSON();

		_object.suppPubInfo = this.suppPubInfo.toJSON();

		return _object;
	}
	//**********************************************************************************
}
//**************************************************************************************