87 lines
2.4 KiB
JavaScript
87 lines
2.4 KiB
JavaScript
const { generateKeyPairSync, generateKeyPair: async } = require('crypto')
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const { promisify } = require('util')
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const {
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THUMBPRINT_MATERIAL, JWK_MEMBERS, PUBLIC_MEMBERS,
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PRIVATE_MEMBERS, KEY_MANAGEMENT_DECRYPT, KEY_MANAGEMENT_ENCRYPT
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} = require('../../help/consts')
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const { OKP_CURVES } = require('../../registry')
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const { edDSASupported } = require('../../help/runtime_support')
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const errors = require('../../errors')
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const Key = require('./base')
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const generateKeyPair = promisify(async)
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const OKP_PUBLIC = new Set(['crv', 'x'])
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Object.freeze(OKP_PUBLIC)
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const OKP_PRIVATE = new Set([...OKP_PUBLIC, 'd'])
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Object.freeze(OKP_PRIVATE)
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// Octet string key pairs Key Type
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class OKPKey extends Key {
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constructor (...args) {
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super(...args)
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this[JWK_MEMBERS]()
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Object.defineProperty(this, 'kty', { value: 'OKP', enumerable: true })
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if (!OKP_CURVES.has(this.crv)) {
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throw new errors.JOSENotSupported('unsupported OKP key curve')
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}
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}
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static get [PUBLIC_MEMBERS] () {
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return OKP_PUBLIC
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}
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static get [PRIVATE_MEMBERS] () {
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return OKP_PRIVATE
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}
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// https://tc39.github.io/ecma262/#sec-ordinaryownpropertykeys no need for any special
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// JSON.stringify handling in V8
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[THUMBPRINT_MATERIAL] () {
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return { crv: this.crv, kty: 'OKP', x: this.x }
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}
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[KEY_MANAGEMENT_ENCRYPT] () {
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return this.algorithms('deriveKey')
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}
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[KEY_MANAGEMENT_DECRYPT] () {
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if (this.public) {
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return new Set()
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}
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return this.algorithms('deriveKey')
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}
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static async generate (crv = 'Ed25519', privat = true) {
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if (!edDSASupported) {
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throw new errors.JOSENotSupported('OKP keys are not supported in your Node.js runtime version')
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}
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if (!OKP_CURVES.has(crv)) {
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throw new errors.JOSENotSupported(`unsupported OKP key curve: ${crv}`)
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}
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const { privateKey, publicKey } = await generateKeyPair(crv.toLowerCase())
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return privat ? privateKey : publicKey
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}
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static generateSync (crv = 'Ed25519', privat = true) {
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if (!edDSASupported) {
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throw new errors.JOSENotSupported('OKP keys are not supported in your Node.js runtime version')
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}
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if (!OKP_CURVES.has(crv)) {
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throw new errors.JOSENotSupported(`unsupported OKP key curve: ${crv}`)
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}
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const { privateKey, publicKey } = generateKeyPairSync(crv.toLowerCase())
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return privat ? privateKey : publicKey
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}
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}
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module.exports = OKPKey
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