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https://github.com/Ylianst/MeshCommander
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Fixed -kvmdatatrace issue.
This commit is contained in:
Ylian Saint-Hilaire
242
pki.js/ECPublicKey.js
Normal file
242
pki.js/ECPublicKey.js
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@@ -0,0 +1,242 @@
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import * as asn1js from "asn1js";
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import { getParametersValue, utilConcatBuf, isEqualBuffer, toBase64, fromBase64, arrayBufferToString, stringToArrayBuffer } from "pvutils";
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//**************************************************************************************
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/**
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* Class from RFC5480
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*/
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export default class ECPublicKey
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{
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//**********************************************************************************
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/**
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* Constructor for ECCPublicKey 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 {ArrayBuffer}
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* @desc type
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*/
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this.x = getParametersValue(parameters, "x", ECPublicKey.defaultValues("x"));
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/**
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* @type {ArrayBuffer}
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* @desc values
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*/
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this.y = getParametersValue(parameters, "y", ECPublicKey.defaultValues("y"));
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/**
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* @type {string}
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* @desc namedCurve
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*/
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this.namedCurve = getParametersValue(parameters, "namedCurve", ECPublicKey.defaultValues("namedCurve"));
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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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//region If input argument array contains "json" for this object
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if("json" in parameters)
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this.fromJSON(parameters.json);
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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 "x":
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case "y":
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return new ArrayBuffer(0);
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case "namedCurve":
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return "";
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default:
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throw new Error(`Invalid member name for ECCPublicKey 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 "x":
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case "y":
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return (isEqualBuffer(memberValue, ECPublicKey.defaultValues(memberName)));
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case "namedCurve":
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return (memberValue === "");
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default:
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throw new Error(`Invalid member name for ECCPublicKey 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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* @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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return new asn1js.RawData();
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}
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//**********************************************************************************
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/**
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* Convert ArrayBuffer into current class
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* @param {!ArrayBuffer} schema Special case: schema is an ArrayBuffer
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*/
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fromSchema(schema)
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{
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//region Check the schema is valid
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if((schema instanceof ArrayBuffer) === false)
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throw new Error("Object's schema was not verified against input data for ECPublicKey");
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const view = new Uint8Array(schema);
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if(view[0] !== 0x04)
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throw new Error("Object's schema was not verified against input data for ECPublicKey");
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//endregion
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//region Get internal properties from parsed schema
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let coordinateLength;
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switch(this.namedCurve)
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{
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case "1.2.840.10045.3.1.7": // P-256
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coordinateLength = 32;
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break;
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case "1.3.132.0.34": // P-384
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coordinateLength = 48;
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break;
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case "1.3.132.0.35": // P-521
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coordinateLength = 66;
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break;
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default:
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throw new Error(`Incorrect curve OID: ${this.namedCurve}`);
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}
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if(schema.byteLength !== (coordinateLength * 2 + 1))
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throw new Error("Object's schema was not verified against input data for ECPublicKey");
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this.x = schema.slice(1, coordinateLength + 1);
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this.y = schema.slice(1 + coordinateLength, coordinateLength * 2 + 1);
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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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return new asn1js.RawData({ data: utilConcatBuf(
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(new Uint8Array([0x04])).buffer,
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this.x,
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this.y
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)
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});
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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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let crvName = "";
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switch(this.namedCurve)
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{
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case "1.2.840.10045.3.1.7": // P-256
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crvName = "P-256";
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break;
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case "1.3.132.0.34": // P-384
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crvName = "P-384";
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break;
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case "1.3.132.0.35": // P-521
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crvName = "P-521";
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break;
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default:
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}
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return {
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crv: crvName,
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x: toBase64(arrayBufferToString(this.x), true, true, false),
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y: toBase64(arrayBufferToString(this.y), true, true, false)
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};
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}
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//**********************************************************************************
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/**
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* Convert JSON value into current object
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* @param {Object} json
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*/
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fromJSON(json)
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{
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let coodinateLength = 0;
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if("crv" in json)
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{
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switch(json.crv.toUpperCase())
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{
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case "P-256":
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this.namedCurve = "1.2.840.10045.3.1.7";
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coodinateLength = 32;
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break;
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case "P-384":
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this.namedCurve = "1.3.132.0.34";
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coodinateLength = 48;
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break;
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case "P-521":
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this.namedCurve = "1.3.132.0.35";
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coodinateLength = 66;
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break;
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default:
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}
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}
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else
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throw new Error("Absent mandatory parameter \"crv\"");
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if("x" in json)
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{
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const convertBuffer = stringToArrayBuffer(fromBase64(json.x, true));
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if(convertBuffer.byteLength < coodinateLength)
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{
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this.x = new ArrayBuffer(coodinateLength);
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const view = new Uint8Array(this.x);
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const convertBufferView = new Uint8Array(convertBuffer);
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view.set(convertBufferView, 1);
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}
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else
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this.x = convertBuffer.slice(0, coodinateLength);
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}
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else
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throw new Error("Absent mandatory parameter \"x\"");
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if("y" in json)
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{
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const convertBuffer = stringToArrayBuffer(fromBase64(json.y, true));
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if(convertBuffer.byteLength < coodinateLength)
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{
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this.y = new ArrayBuffer(coodinateLength);
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const view = new Uint8Array(this.y);
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const convertBufferView = new Uint8Array(convertBuffer);
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view.set(convertBufferView, 1);
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}
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else
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this.y = convertBuffer.slice(0, coodinateLength);
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}
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else
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throw new Error("Absent mandatory parameter \"y\"");
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}
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//**********************************************************************************
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}
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//**************************************************************************************
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