hono/dist/utils/jwt/jwt.js

Web framework built on Web Standards

// src/utils/jwt/jwt.ts
import { decodeBase64Url, encodeBase64Url } from "../../utils/encode.js";
import { AlgorithmTypes } from "./jwa.js";
import { signing, verifying } from "./jws.js";
import {
  JwtHeaderInvalid,
  JwtTokenExpired,
  JwtTokenInvalid,
  JwtTokenIssuedAt,
  JwtTokenNotBefore,
  JwtTokenSignatureMismatched
} from "./types.js";
import { utf8Decoder, utf8Encoder } from "./utf8.js";
var encodeJwtPart = (part) => encodeBase64Url(utf8Encoder.encode(JSON.stringify(part))).replace(/=/g, "");
var encodeSignaturePart = (buf) => encodeBase64Url(buf).replace(/=/g, "");
var decodeJwtPart = (part) => JSON.parse(utf8Decoder.decode(decodeBase64Url(part)));
function isTokenHeader(obj) {
  if (typeof obj === "object" && obj !== null) {
    const objWithAlg = obj;
    return "alg" in objWithAlg && Object.values(AlgorithmTypes).includes(objWithAlg.alg) && (!("typ" in objWithAlg) || objWithAlg.typ === "JWT");
  }
  return false;
}
var sign = async (payload, privateKey, alg = "HS256") => {
  const encodedPayload = encodeJwtPart(payload);
  const encodedHeader = encodeJwtPart({ alg, typ: "JWT" });
  const partialToken = `${encodedHeader}.${encodedPayload}`;
  const signaturePart = await signing(privateKey, alg, utf8Encoder.encode(partialToken));
  const signature = encodeSignaturePart(signaturePart);
  return `${partialToken}.${signature}`;
};
var verify = async (token, publicKey, alg = "HS256") => {
  const tokenParts = token.split(".");
  if (tokenParts.length !== 3) {
    throw new JwtTokenInvalid(token);
  }
  const { header, payload } = decode(token);
  if (!isTokenHeader(header)) {
    throw new JwtHeaderInvalid(header);
  }
  const now = Math.floor(Date.now() / 1e3);
  if (payload.nbf && payload.nbf > now) {
    throw new JwtTokenNotBefore(token);
  }
  if (payload.exp && payload.exp <= now) {
    throw new JwtTokenExpired(token);
  }
  if (payload.iat && now < payload.iat) {
    throw new JwtTokenIssuedAt(now, payload.iat);
  }
  const headerPayload = token.substring(0, token.lastIndexOf("."));
  const verified = await verifying(
    publicKey,
    alg,
    decodeBase64Url(tokenParts[2]),
    utf8Encoder.encode(headerPayload)
  );
  if (!verified) {
    throw new JwtTokenSignatureMismatched(token);
  }
  return payload;
};
var decode = (token) => {
  try {
    const [h, p] = token.split(".");
    const header = decodeJwtPart(h);
    const payload = decodeJwtPart(p);
    return {
      header,
      payload
    };
  } catch (e) {
    throw new JwtTokenInvalid(token);
  }
};
export {
  decode,
  isTokenHeader,
  sign,
  verify
};