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Viewing file:     generate.js (4.16 KB)      -rw-r--r--

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.generateKeyPair = exports.generateSecret = void 0;
const crypto_1 = require("crypto");
const util_1 = require("util");
const random_js_1 = require("./random.js");
const check_modulus_length_js_1 = require("./check_modulus_length.js");
const errors_js_1 = require("../util/errors.js");
const generate = (0, util_1.promisify)(crypto_1.generateKeyPair);
async function generateSecret(alg, options) {
    let length;
    switch (alg) {
        case 'HS256':
        case 'HS384':
        case 'HS512':
        case 'A128CBC-HS256':
        case 'A192CBC-HS384':
        case 'A256CBC-HS512':
            length = parseInt(alg.slice(-3), 10);
            break;
        case 'A128KW':
        case 'A192KW':
        case 'A256KW':
        case 'A128GCMKW':
        case 'A192GCMKW':
        case 'A256GCMKW':
        case 'A128GCM':
        case 'A192GCM':
        case 'A256GCM':
            length = parseInt(alg.slice(1, 4), 10);
            break;
        default:
            throw new errors_js_1.JOSENotSupported('Invalid or unsupported JWK "alg" (Algorithm) Parameter value');
    }
    return (0, crypto_1.createSecretKey)((0, random_js_1.default)(new Uint8Array(length >> 3)));
}
exports.generateSecret = generateSecret;
async function generateKeyPair(alg, options) {
    var _a, _b;
    switch (alg) {
        case 'RS256':
        case 'RS384':
        case 'RS512':
        case 'PS256':
        case 'PS384':
        case 'PS512':
        case 'RSA-OAEP':
        case 'RSA-OAEP-256':
        case 'RSA-OAEP-384':
        case 'RSA-OAEP-512':
        case 'RSA1_5': {
            const modulusLength = (_a = options === null || options === void 0 ? void 0 : options.modulusLength) !== null && _a !== void 0 ? _a : 2048;
            if (typeof modulusLength !== 'number' || modulusLength < 2048) {
                throw new errors_js_1.JOSENotSupported('Invalid or unsupported modulusLength option provided, 2048 bits or larger keys must be used');
            }
            const keypair = await generate('rsa', {
                modulusLength,
                publicExponent: 0x10001,
            });
            (0, check_modulus_length_js_1.setModulusLength)(keypair.privateKey, modulusLength);
            (0, check_modulus_length_js_1.setModulusLength)(keypair.publicKey, modulusLength);
            return keypair;
        }
        case 'ES256':
            return generate('ec', { namedCurve: 'P-256' });
        case 'ES256K':
            return generate('ec', { namedCurve: 'secp256k1' });
        case 'ES384':
            return generate('ec', { namedCurve: 'P-384' });
        case 'ES512':
            return generate('ec', { namedCurve: 'P-521' });
        case 'EdDSA': {
            switch (options === null || options === void 0 ? void 0 : options.crv) {
                case undefined:
                case 'Ed25519':
                    return generate('ed25519');
                case 'Ed448':
                    return generate('ed448');
                default:
                    throw new errors_js_1.JOSENotSupported('Invalid or unsupported crv option provided, supported values are Ed25519 and Ed448');
            }
        }
        case 'ECDH-ES':
        case 'ECDH-ES+A128KW':
        case 'ECDH-ES+A192KW':
        case 'ECDH-ES+A256KW':
            const crv = (_b = options === null || options === void 0 ? void 0 : options.crv) !== null && _b !== void 0 ? _b : 'P-256';
            switch (crv) {
                case undefined:
                case 'P-256':
                case 'P-384':
                case 'P-521':
                    return generate('ec', { namedCurve: crv });
                case 'X25519':
                    return generate('x25519');
                case 'X448':
                    return generate('x448');
                default:
                    throw new errors_js_1.JOSENotSupported('Invalid or unsupported crv option provided, supported values are P-256, P-384, P-521, X25519, and X448');
            }
        default:
            throw new errors_js_1.JOSENotSupported('Invalid or unsupported JWK "alg" (Algorithm) Parameter value');
    }
}
exports.generateKeyPair = generateKeyPair;