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https://github.com/Ylianst/MeshCommander
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Fixed -kvmdatatrace issue.
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Ylian Saint-Hilaire
287
pki.js/EncryptedContentInfo.js
Normal file
287
pki.js/EncryptedContentInfo.js
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@@ -0,0 +1,287 @@
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import * as asn1js from "asn1js";
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import { getParametersValue, clearProps } from "pvutils";
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import AlgorithmIdentifier from "./AlgorithmIdentifier.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 EncryptedContentInfo
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{
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//**********************************************************************************
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/**
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* Constructor for EncryptedContentInfo 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 {string}
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* @desc contentType
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*/
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this.contentType = getParametersValue(parameters, "contentType", EncryptedContentInfo.defaultValues("contentType"));
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/**
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* @type {AlgorithmIdentifier}
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* @desc contentEncryptionAlgorithm
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*/
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this.contentEncryptionAlgorithm = getParametersValue(parameters, "contentEncryptionAlgorithm", EncryptedContentInfo.defaultValues("contentEncryptionAlgorithm"));
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if("encryptedContent" in parameters)
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{
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/**
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* @type {OctetString}
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* @desc encryptedContent (!!!) could be contructive or primitive value (!!!)
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*/
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this.encryptedContent = parameters.encryptedContent;
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if((this.encryptedContent.idBlock.tagClass === 1) &&
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(this.encryptedContent.idBlock.tagNumber === 4))
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{
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//region Divide OCTETSTRING value down to small pieces
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if(this.encryptedContent.idBlock.isConstructed === false)
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{
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const constrString = new asn1js.OctetString({
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idBlock: { isConstructed: true },
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isConstructed: true
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});
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let offset = 0;
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let length = this.encryptedContent.valueBlock.valueHex.byteLength;
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while(length > 0)
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{
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const pieceView = new Uint8Array(this.encryptedContent.valueBlock.valueHex, offset, ((offset + 1024) > this.encryptedContent.valueBlock.valueHex.byteLength) ? (this.encryptedContent.valueBlock.valueHex.byteLength - offset) : 1024);
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const _array = new ArrayBuffer(pieceView.length);
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const _view = new Uint8Array(_array);
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for(let i = 0; i < _view.length; i++)
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_view[i] = pieceView[i];
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constrString.valueBlock.value.push(new asn1js.OctetString({ valueHex: _array }));
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length -= pieceView.length;
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offset += pieceView.length;
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}
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this.encryptedContent = constrString;
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}
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//endregion
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}
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}
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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 "contentType":
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return "";
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case "contentEncryptionAlgorithm":
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return new AlgorithmIdentifier();
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case "encryptedContent":
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return new asn1js.OctetString();
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default:
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throw new Error(`Invalid member name for EncryptedContentInfo 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 "contentType":
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return (memberValue === "");
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case "contentEncryptionAlgorithm":
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return ((memberValue.algorithmId === "") && (("algorithmParams" in memberValue) === false));
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case "encryptedContent":
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return (memberValue.isEqual(EncryptedContentInfo.defaultValues(memberName)));
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default:
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throw new Error(`Invalid member name for EncryptedContentInfo 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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* EncryptedContentInfo ::= SEQUENCE {
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* contentType ContentType,
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* contentEncryptionAlgorithm ContentEncryptionAlgorithmIdentifier,
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* encryptedContent [0] IMPLICIT EncryptedContent OPTIONAL }
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*
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* Comment: Strange, but modern crypto engines create "encryptedContent" as "[0] EXPLICIT EncryptedContent"
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*
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* EncryptedContent ::= OCTET STRING
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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 {string} [contentType]
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* @property {string} [contentEncryptionAlgorithm]
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* @property {string} [encryptedContent]
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*/
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const names = getParametersValue(parameters, "names", {});
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return (new asn1js.Sequence({
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name: (names.blockName || ""),
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value: [
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new asn1js.ObjectIdentifier({ name: (names.contentType || "") }),
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AlgorithmIdentifier.schema(names.contentEncryptionAlgorithm || {}),
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// The CHOICE we need because "EncryptedContent" could have either "constructive"
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// or "primitive" form of encoding and we need to handle both variants
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new asn1js.Choice({
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value: [
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new asn1js.Constructed({
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name: (names.encryptedContent || ""),
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idBlock: {
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tagClass: 3, // CONTEXT-SPECIFIC
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tagNumber: 0 // [0]
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},
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value: [
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new asn1js.Repeated({
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value: new asn1js.OctetString()
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})
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]
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}),
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new asn1js.Primitive({
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name: (names.encryptedContent || ""),
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idBlock: {
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tagClass: 3, // CONTEXT-SPECIFIC
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tagNumber: 0 // [0]
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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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}
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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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"contentType",
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"contentEncryptionAlgorithm",
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"encryptedContent"
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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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EncryptedContentInfo.schema({
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names: {
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contentType: "contentType",
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contentEncryptionAlgorithm: {
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names: {
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blockName: "contentEncryptionAlgorithm"
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}
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},
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encryptedContent: "encryptedContent"
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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 EncryptedContentInfo");
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//endregion
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//region Get internal properties from parsed schema
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this.contentType = asn1.result.contentType.valueBlock.toString();
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this.contentEncryptionAlgorithm = new AlgorithmIdentifier({ schema: asn1.result.contentEncryptionAlgorithm });
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if("encryptedContent" in asn1.result)
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{
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this.encryptedContent = asn1.result.encryptedContent;
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this.encryptedContent.idBlock.tagClass = 1; // UNIVERSAL
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this.encryptedContent.idBlock.tagNumber = 4; // OCTETSTRING (!!!) The value still has instance of "in_window.org.pkijs.asn1.ASN1_CONSTRUCTED / ASN1_PRIMITIVE"
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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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* 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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//region Create array for output sequence
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const sequenceLengthBlock = {
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isIndefiniteForm: false
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};
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const outputArray = [];
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outputArray.push(new asn1js.ObjectIdentifier({ value: this.contentType }));
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outputArray.push(this.contentEncryptionAlgorithm.toSchema());
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if("encryptedContent" in this)
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{
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sequenceLengthBlock.isIndefiniteForm = this.encryptedContent.idBlock.isConstructed;
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const encryptedValue = this.encryptedContent;
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encryptedValue.idBlock.tagClass = 3; // CONTEXT-SPECIFIC
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encryptedValue.idBlock.tagNumber = 0; // [0]
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encryptedValue.lenBlock.isIndefiniteForm = this.encryptedContent.idBlock.isConstructed;
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outputArray.push(encryptedValue);
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}
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//endregion
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//region Construct and return new ASN.1 schema for this object
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return (new asn1js.Sequence({
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lenBlock: sequenceLengthBlock,
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value: outputArray
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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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const _object = {
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contentType: this.contentType,
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contentEncryptionAlgorithm: this.contentEncryptionAlgorithm.toJSON()
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};
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if("encryptedContent" in this)
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_object.encryptedContent = this.encryptedContent.toJSON();
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return _object;
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}
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//**********************************************************************************
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}
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//**************************************************************************************
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