nativescript
Version:
Command-line interface for building NativeScript projects
64 lines • 2.7 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.GSASRPAuthenticator = void 0;
const js_srp_1 = require("@foxt/js-srp");
const crypto = require("crypto");
let srp = new js_srp_1.Srp(js_srp_1.Mode.GSA, js_srp_1.Hash.SHA256, 2048);
const stringToU8Array = (str) => new TextEncoder().encode(str);
const base64ToU8Array = (str) => Uint8Array.from(Buffer.from(str, "base64"));
class GSASRPAuthenticator {
constructor(username) {
this.username = username;
this.srpClient = undefined;
}
async derivePassword(protocol, password, salt, iterations) {
let passHash = new Uint8Array(await js_srp_1.util.hash(srp.h, stringToU8Array(password)));
if (protocol == "s2k_fo") {
passHash = stringToU8Array(js_srp_1.util.toHex(passHash));
}
let imported = await crypto.subtle.importKey("raw", passHash, { name: "PBKDF2" }, false, ["deriveBits"]);
let derived = await crypto.subtle.deriveBits({
name: "PBKDF2",
hash: { name: "SHA-256" },
iterations,
salt,
}, imported, 256);
return new Uint8Array(derived);
}
async getInit() {
if (this.srpClient)
throw new Error("Already initialized");
this.srpClient = await srp.newClient(stringToU8Array(this.username),
// provide fake passsword because we need to get data from server
new Uint8Array());
let a = Buffer.from(js_srp_1.util.bytesFromBigint(this.srpClient.A)).toString("base64");
return {
a,
protocols: ["s2k", "s2k_fo"],
accountName: this.username,
};
}
async getComplete(password, serverData) {
if (!this.srpClient)
throw new Error("Not initialized");
if (serverData.protocol != "s2k" && serverData.protocol != "s2k_fo")
throw new Error("Unsupported protocol " + serverData.protocol);
let salt = base64ToU8Array(serverData.salt);
let serverPub = base64ToU8Array(serverData.b);
let iterations = serverData.iteration;
let derived = await this.derivePassword(serverData.protocol, password, salt, iterations);
this.srpClient.p = derived;
await this.srpClient.generate(salt, serverPub);
let m1 = Buffer.from(this.srpClient._M).toString("base64");
let M2 = await this.srpClient.generateM2();
let m2 = Buffer.from(M2).toString("base64");
return {
accountName: this.username,
m1,
m2,
c: serverData.c,
};
}
}
exports.GSASRPAuthenticator = GSASRPAuthenticator;
//# sourceMappingURL=srp-wrapper.js.map