@gaonengwww/jose/dist/webapi/jwe/compact/decrypt.js

JWA, JWS, JWE, JWT, JWK, JWKS for Node.js, Browser, Cloudflare Workers, Deno, Bun, and other Web-interoperable runtimes

// src/lib/buffer_utils.ts
var encoder = new TextEncoder();
var decoder = new TextDecoder();
var MAX_INT32 = 2 ** 32;
function concat(...buffers) {
  const size = buffers.reduce((acc, { length }) => acc + length, 0);
  const buf = new Uint8Array(size);
  let i = 0;
  for (const buffer of buffers) {
    buf.set(buffer, i);
    i += buffer.length;
  }
  return buf;
}
function writeUInt32BE(buf, value, offset) {
  if (value < 0 || value >= MAX_INT32) {
    throw new RangeError(`value must be >= 0 and <= ${MAX_INT32 - 1}. Received ${value}`);
  }
  buf.set([value >>> 24, value >>> 16, value >>> 8, value & 255], offset);
}
function uint64be(value) {
  const high = Math.floor(value / MAX_INT32);
  const low = value % MAX_INT32;
  const buf = new Uint8Array(8);
  writeUInt32BE(buf, high, 0);
  writeUInt32BE(buf, low, 4);
  return buf;
}
function uint32be(value) {
  const buf = new Uint8Array(4);
  writeUInt32BE(buf, value);
  return buf;
}

// src/lib/base64.ts
function decodeBase64(encoded) {
  if (Uint8Array.fromBase64) {
    return Uint8Array.fromBase64(encoded);
  }
  const binary = atob(encoded);
  const bytes = new Uint8Array(binary.length);
  for (let i = 0; i < binary.length; i++) {
    bytes[i] = binary.charCodeAt(i);
  }
  return bytes;
}

// src/util/base64url.ts
function decode(input) {
  if (Uint8Array.fromBase64) {
    return Uint8Array.fromBase64(typeof input === "string" ? input : decoder.decode(input), {
      alphabet: "base64url"
    });
  }
  let encoded = input;
  if (encoded instanceof Uint8Array) {
    encoded = decoder.decode(encoded);
  }
  encoded = encoded.replace(/-/g, "+").replace(/_/g, "/").replace(/\s/g, "");
  try {
    return decodeBase64(encoded);
  } catch {
    throw new TypeError("The input to be decoded is not correctly encoded.");
  }
}

// src/util/errors.ts
var JOSEError = class extends Error {
  /**
   * A unique error code for the particular error subclass.
   *
   * @ignore
   */
  static code = "ERR_JOSE_GENERIC";
  /** A unique error code for {@link JOSEError}. */
  code = "ERR_JOSE_GENERIC";
  /** @ignore */
  constructor(message2, options) {
    super(message2, options);
    this.name = this.constructor.name;
    Error.captureStackTrace?.(this, this.constructor);
  }
};
var JOSEAlgNotAllowed = class extends JOSEError {
  /** @ignore */
  static code = "ERR_JOSE_ALG_NOT_ALLOWED";
  /** A unique error code for {@link JOSEAlgNotAllowed}. */
  code = "ERR_JOSE_ALG_NOT_ALLOWED";
};
var JOSENotSupported = class extends JOSEError {
  /** @ignore */
  static code = "ERR_JOSE_NOT_SUPPORTED";
  /** A unique error code for {@link JOSENotSupported}. */
  code = "ERR_JOSE_NOT_SUPPORTED";
};
var JWEDecryptionFailed = class extends JOSEError {
  /** @ignore */
  static code = "ERR_JWE_DECRYPTION_FAILED";
  /** A unique error code for {@link JWEDecryptionFailed}. */
  code = "ERR_JWE_DECRYPTION_FAILED";
  /** @ignore */
  constructor(message2 = "decryption operation failed", options) {
    super(message2, options);
  }
};
var JWEInvalid = class extends JOSEError {
  /** @ignore */
  static code = "ERR_JWE_INVALID";
  /** A unique error code for {@link JWEInvalid}. */
  code = "ERR_JWE_INVALID";
};

// src/lib/iv.ts
function bitLength(alg) {
  switch (alg) {
    case "A128GCM":
    case "A128GCMKW":
    case "A192GCM":
    case "A192GCMKW":
    case "A256GCM":
    case "A256GCMKW":
      return 96;
    case "A128CBC-HS256":
    case "A192CBC-HS384":
    case "A256CBC-HS512":
      return 128;
    default:
      throw new JOSENotSupported(`Unsupported JWE Algorithm: ${alg}`);
  }
}

// src/lib/check_iv_length.ts
var check_iv_length_default = (enc, iv) => {
  if (iv.length << 3 !== bitLength(enc)) {
    throw new JWEInvalid("Invalid Initialization Vector length");
  }
};

// src/lib/check_cek_length.ts
var check_cek_length_default = (cek, expected) => {
  const actual = cek.byteLength << 3;
  if (actual !== expected) {
    throw new JWEInvalid(
      `Invalid Content Encryption Key length. Expected ${expected} bits, got ${actual} bits`
    );
  }
};

// src/lib/crypto_key.ts
function unusable(name, prop = "algorithm.name") {
  return new TypeError(`CryptoKey does not support this operation, its ${prop} must be ${name}`);
}
function isAlgorithm(algorithm, name) {
  return algorithm.name === name;
}
function getHashLength(hash) {
  return parseInt(hash.name.slice(4), 10);
}
function checkUsage(key, usage) {
  if (usage && !key.usages.includes(usage)) {
    throw new TypeError(
      `CryptoKey does not support this operation, its usages must include ${usage}.`
    );
  }
}
function checkEncCryptoKey(key, alg, usage) {
  switch (alg) {
    case "A128GCM":
    case "A192GCM":
    case "A256GCM": {
      if (!isAlgorithm(key.algorithm, "AES-GCM")) throw unusable("AES-GCM");
      const expected = parseInt(alg.slice(1, 4), 10);
      const actual = key.algorithm.length;
      if (actual !== expected) throw unusable(expected, "algorithm.length");
      break;
    }
    case "A128KW":
    case "A192KW":
    case "A256KW": {
      if (!isAlgorithm(key.algorithm, "AES-KW")) throw unusable("AES-KW");
      const expected = parseInt(alg.slice(1, 4), 10);
      const actual = key.algorithm.length;
      if (actual !== expected) throw unusable(expected, "algorithm.length");
      break;
    }
    case "ECDH": {
      switch (key.algorithm.name) {
        case "ECDH":
        case "X25519":
          break;
        default:
          throw unusable("ECDH or X25519");
      }
      break;
    }
    case "PBES2-HS256+A128KW":
    case "PBES2-HS384+A192KW":
    case "PBES2-HS512+A256KW":
      if (!isAlgorithm(key.algorithm, "PBKDF2")) throw unusable("PBKDF2");
      break;
    case "RSA-OAEP":
    case "RSA-OAEP-256":
    case "RSA-OAEP-384":
    case "RSA-OAEP-512": {
      if (!isAlgorithm(key.algorithm, "RSA-OAEP")) throw unusable("RSA-OAEP");
      const expected = parseInt(alg.slice(9), 10) || 1;
      const actual = getHashLength(key.algorithm.hash);
      if (actual !== expected) throw unusable(`SHA-${expected}`, "algorithm.hash");
      break;
    }
    default:
      throw new TypeError("CryptoKey does not support this operation");
  }
  checkUsage(key, usage);
}

// src/lib/invalid_key_input.ts
function message(msg, actual, ...types) {
  types = types.filter(Boolean);
  if (types.length > 2) {
    const last = types.pop();
    msg += `one of type ${types.join(", ")}, or ${last}.`;
  } else if (types.length === 2) {
    msg += `one of type ${types[0]} or ${types[1]}.`;
  } else {
    msg += `of type ${types[0]}.`;
  }
  if (actual == null) {
    msg += ` Received ${actual}`;
  } else if (typeof actual === "function" && actual.name) {
    msg += ` Received function ${actual.name}`;
  } else if (typeof actual === "object" && actual != null) {
    if (actual.constructor?.name) {
      msg += ` Received an instance of ${actual.constructor.name}`;
    }
  }
  return msg;
}
var invalid_key_input_default = (actual, ...types) => {
  return message("Key must be ", actual, ...types);
};
function withAlg(alg, actual, ...types) {
  return message(`Key for the ${alg} algorithm must be `, actual, ...types);
}

// src/lib/is_key_like.ts
function assertCryptoKey(key) {
  if (!isCryptoKey(key)) {
    throw new Error("CryptoKey instance expected");
  }
}
function isCryptoKey(key) {
  return key?.[Symbol.toStringTag] === "CryptoKey";
}
function isKeyObject(key) {
  return key?.[Symbol.toStringTag] === "KeyObject";
}
var is_key_like_default = (key) => {
  return isCryptoKey(key) || isKeyObject(key);
};

// src/lib/decrypt.ts
async function timingSafeEqual(a, b) {
  if (!(a instanceof Uint8Array)) {
    throw new TypeError("First argument must be a buffer");
  }
  if (!(b instanceof Uint8Array)) {
    throw new TypeError("Second argument must be a buffer");
  }
  const algorithm = { name: "HMAC", hash: "SHA-256" };
  const key = await crypto.subtle.generateKey(algorithm, false, ["sign"]);
  const aHmac = new Uint8Array(await crypto.subtle.sign(algorithm, key, a));
  const bHmac = new Uint8Array(await crypto.subtle.sign(algorithm, key, b));
  let out = 0;
  let i = -1;
  while (++i < 32) {
    out |= aHmac[i] ^ bHmac[i];
  }
  return out === 0;
}
async function cbcDecrypt(enc, cek, ciphertext, iv, tag2, aad) {
  if (!(cek instanceof Uint8Array)) {
    throw new TypeError(invalid_key_input_default(cek, "Uint8Array"));
  }
  const keySize = parseInt(enc.slice(1, 4), 10);
  const encKey = await crypto.subtle.importKey(
    "raw",
    cek.subarray(keySize >> 3),
    "AES-CBC",
    false,
    ["decrypt"]
  );
  const macKey = await crypto.subtle.importKey(
    "raw",
    cek.subarray(0, keySize >> 3),
    {
      hash: `SHA-${keySize << 1}`,
      name: "HMAC"
    },
    false,
    ["sign"]
  );
  const macData = concat(aad, iv, ciphertext, uint64be(aad.length << 3));
  const expectedTag = new Uint8Array(
    (await crypto.subtle.sign("HMAC", macKey, macData)).slice(0, keySize >> 3)
  );
  let macCheckPassed;
  try {
    macCheckPassed = await timingSafeEqual(tag2, expectedTag);
  } catch {
  }
  if (!macCheckPassed) {
    throw new JWEDecryptionFailed();
  }
  let plaintext;
  try {
    plaintext = new Uint8Array(
      await crypto.subtle.decrypt({ iv, name: "AES-CBC" }, encKey, ciphertext)
    );
  } catch {
  }
  if (!plaintext) {
    throw new JWEDecryptionFailed();
  }
  return plaintext;
}
async function gcmDecrypt(enc, cek, ciphertext, iv, tag2, aad) {
  let encKey;
  if (cek instanceof Uint8Array) {
    encKey = await crypto.subtle.importKey("raw", cek, "AES-GCM", false, ["decrypt"]);
  } else {
    checkEncCryptoKey(cek, enc, "decrypt");
    encKey = cek;
  }
  try {
    return new Uint8Array(
      await crypto.subtle.decrypt(
        {
          additionalData: aad,
          iv,
          name: "AES-GCM",
          tagLength: 128
        },
        encKey,
        concat(ciphertext, tag2)
      )
    );
  } catch {
    throw new JWEDecryptionFailed();
  }
}
var decrypt_default = async (enc, cek, ciphertext, iv, tag2, aad) => {
  if (!isCryptoKey(cek) && !(cek instanceof Uint8Array)) {
    throw new TypeError(
      invalid_key_input_default(cek, "CryptoKey", "KeyObject", "Uint8Array", "JSON Web Key")
    );
  }
  if (!iv) {
    throw new JWEInvalid("JWE Initialization Vector missing");
  }
  if (!tag2) {
    throw new JWEInvalid("JWE Authentication Tag missing");
  }
  check_iv_length_default(enc, iv);
  switch (enc) {
    case "A128CBC-HS256":
    case "A192CBC-HS384":
    case "A256CBC-HS512":
      if (cek instanceof Uint8Array) check_cek_length_default(cek, parseInt(enc.slice(-3), 10));
      return cbcDecrypt(enc, cek, ciphertext, iv, tag2, aad);
    case "A128GCM":
    case "A192GCM":
    case "A256GCM":
      if (cek instanceof Uint8Array) check_cek_length_default(cek, parseInt(enc.slice(1, 4), 10));
      return gcmDecrypt(enc, cek, ciphertext, iv, tag2, aad);
    default:
      throw new JOSENotSupported("Unsupported JWE Content Encryption Algorithm");
  }
};

// src/lib/is_disjoint.ts
var is_disjoint_default = (...headers) => {
  const sources = headers.filter(Boolean);
  if (sources.length === 0 || sources.length === 1) {
    return true;
  }
  let acc;
  for (const header of sources) {
    const parameters = Object.keys(header);
    if (!acc || acc.size === 0) {
      acc = new Set(parameters);
      continue;
    }
    for (const parameter of parameters) {
      if (acc.has(parameter)) {
        return false;
      }
      acc.add(parameter);
    }
  }
  return true;
};

// src/lib/is_object.ts
function isObjectLike(value) {
  return typeof value === "object" && value !== null;
}
var is_object_default = (input) => {
  if (!isObjectLike(input) || Object.prototype.toString.call(input) !== "[object Object]") {
    return false;
  }
  if (Object.getPrototypeOf(input) === null) {
    return true;
  }
  let proto = input;
  while (Object.getPrototypeOf(proto) !== null) {
    proto = Object.getPrototypeOf(proto);
  }
  return Object.getPrototypeOf(input) === proto;
};

// src/lib/aeskw.ts
function checkKeySize(key, alg) {
  if (key.algorithm.length !== parseInt(alg.slice(1, 4), 10)) {
    throw new TypeError(`Invalid key size for alg: ${alg}`);
  }
}
function getCryptoKey(key, alg, usage) {
  if (key instanceof Uint8Array) {
    return crypto.subtle.importKey("raw", key, "AES-KW", true, [usage]);
  }
  checkEncCryptoKey(key, alg, usage);
  return key;
}
async function unwrap(alg, key, encryptedKey) {
  const cryptoKey = await getCryptoKey(key, alg, "unwrapKey");
  checkKeySize(cryptoKey, alg);
  const cryptoKeyCek = await crypto.subtle.unwrapKey(
    "raw",
    encryptedKey,
    cryptoKey,
    "AES-KW",
    { hash: "SHA-256", name: "HMAC" },
    true,
    ["sign"]
  );
  return new Uint8Array(await crypto.subtle.exportKey("raw", cryptoKeyCek));
}

// src/lib/digest.ts
var digest_default = async (algorithm, data) => {
  const subtleDigest = `SHA-${algorithm.slice(-3)}`;
  return new Uint8Array(await crypto.subtle.digest(subtleDigest, data));
};

// src/lib/ecdhes.ts
function lengthAndInput(input) {
  return concat(uint32be(input.length), input);
}
async function concatKdf(secret, bits, value) {
  const iterations = Math.ceil((bits >> 3) / 32);
  const res = new Uint8Array(iterations * 32);
  for (let iter = 0; iter < iterations; iter++) {
    const buf = new Uint8Array(4 + secret.length + value.length);
    buf.set(uint32be(iter + 1));
    buf.set(secret, 4);
    buf.set(value, 4 + secret.length);
    res.set(await digest_default("sha256", buf), iter * 32);
  }
  return res.slice(0, bits >> 3);
}
async function deriveKey(publicKey, privateKey, algorithm, keyLength, apu = new Uint8Array(0), apv = new Uint8Array(0)) {
  checkEncCryptoKey(publicKey, "ECDH");
  checkEncCryptoKey(privateKey, "ECDH", "deriveBits");
  const value = concat(
    lengthAndInput(encoder.encode(algorithm)),
    lengthAndInput(apu),
    lengthAndInput(apv),
    uint32be(keyLength)
  );
  let length;
  if (publicKey.algorithm.name === "X25519") {
    length = 256;
  } else {
    length = Math.ceil(parseInt(publicKey.algorithm.namedCurve.slice(-3), 10) / 8) << 3;
  }
  const sharedSecret = new Uint8Array(
    await crypto.subtle.deriveBits(
      {
        name: publicKey.algorithm.name,
        public: publicKey
      },
      privateKey,
      length
    )
  );
  return concatKdf(sharedSecret, keyLength, value);
}
function allowed(key) {
  switch (key.algorithm.namedCurve) {
    case "P-256":
    case "P-384":
    case "P-521":
      return true;
    default:
      return key.algorithm.name === "X25519";
  }
}

// src/lib/pbes2kw.ts
function getCryptoKey2(key, alg) {
  if (key instanceof Uint8Array) {
    return crypto.subtle.importKey("raw", key, "PBKDF2", false, ["deriveBits"]);
  }
  checkEncCryptoKey(key, alg, "deriveBits");
  return key;
}
var concatSalt = (alg, p2sInput) => concat(encoder.encode(alg), new Uint8Array([0]), p2sInput);
async function deriveKey2(p2s, alg, p2c, key) {
  if (!(p2s instanceof Uint8Array) || p2s.length < 8) {
    throw new JWEInvalid("PBES2 Salt Input must be 8 or more octets");
  }
  const salt = concatSalt(alg, p2s);
  const keylen = parseInt(alg.slice(13, 16), 10);
  const subtleAlg = {
    hash: `SHA-${alg.slice(8, 11)}`,
    iterations: p2c,
    name: "PBKDF2",
    salt
  };
  const cryptoKey = await getCryptoKey2(key, alg);
  return new Uint8Array(await crypto.subtle.deriveBits(subtleAlg, cryptoKey, keylen));
}
async function unwrap2(alg, key, encryptedKey, p2c, p2s) {
  const derived = await deriveKey2(p2s, alg, p2c, key);
  return unwrap(alg.slice(-6), derived, encryptedKey);
}

// src/lib/check_key_length.ts
var check_key_length_default = (alg, key) => {
  if (alg.startsWith("RS") || alg.startsWith("PS")) {
    const { modulusLength } = key.algorithm;
    if (typeof modulusLength !== "number" || modulusLength < 2048) {
      throw new TypeError(`${alg} requires key modulusLength to be 2048 bits or larger`);
    }
  }
};

// src/lib/rsaes.ts
var subtleAlgorithm = (alg) => {
  switch (alg) {
    case "RSA-OAEP":
    case "RSA-OAEP-256":
    case "RSA-OAEP-384":
    case "RSA-OAEP-512":
      return "RSA-OAEP";
    default:
      throw new JOSENotSupported(
        `alg ${alg} is not supported either by JOSE or your javascript runtime`
      );
  }
};
async function decrypt(alg, key, encryptedKey) {
  checkEncCryptoKey(key, alg, "decrypt");
  check_key_length_default(alg, key);
  return new Uint8Array(await crypto.subtle.decrypt(subtleAlgorithm(alg), key, encryptedKey));
}

// src/lib/cek.ts
function bitLength2(alg) {
  switch (alg) {
    case "A128GCM":
      return 128;
    case "A192GCM":
      return 192;
    case "A256GCM":
    case "A128CBC-HS256":
      return 256;
    case "A192CBC-HS384":
      return 384;
    case "A256CBC-HS512":
      return 512;
    default:
      throw new JOSENotSupported(`Unsupported JWE Algorithm: ${alg}`);
  }
}
var cek_default = (alg) => crypto.getRandomValues(new Uint8Array(bitLength2(alg) >> 3));

// src/lib/jwk_to_key.ts
function subtleMapping(jwk) {
  let algorithm;
  let keyUsages;
  switch (jwk.kty) {
    case "RSA": {
      switch (jwk.alg) {
        case "PS256":
        case "PS384":
        case "PS512":
          algorithm = { name: "RSA-PSS", hash: `SHA-${jwk.alg.slice(-3)}` };
          keyUsages = jwk.d ? ["sign"] : ["verify"];
          break;
        case "RS256":
        case "RS384":
        case "RS512":
          algorithm = { name: "RSASSA-PKCS1-v1_5", hash: `SHA-${jwk.alg.slice(-3)}` };
          keyUsages = jwk.d ? ["sign"] : ["verify"];
          break;
        case "RSA-OAEP":
        case "RSA-OAEP-256":
        case "RSA-OAEP-384":
        case "RSA-OAEP-512":
          algorithm = {
            name: "RSA-OAEP",
            hash: `SHA-${parseInt(jwk.alg.slice(-3), 10) || 1}`
          };
          keyUsages = jwk.d ? ["decrypt", "unwrapKey"] : ["encrypt", "wrapKey"];
          break;
        default:
          throw new JOSENotSupported('Invalid or unsupported JWK "alg" (Algorithm) Parameter value');
      }
      break;
    }
    case "EC": {
      switch (jwk.alg) {
        case "ES256":
          algorithm = { name: "ECDSA", namedCurve: "P-256" };
          keyUsages = jwk.d ? ["sign"] : ["verify"];
          break;
        case "ES384":
          algorithm = { name: "ECDSA", namedCurve: "P-384" };
          keyUsages = jwk.d ? ["sign"] : ["verify"];
          break;
        case "ES512":
          algorithm = { name: "ECDSA", namedCurve: "P-521" };
          keyUsages = jwk.d ? ["sign"] : ["verify"];
          break;
        case "ECDH-ES":
        case "ECDH-ES+A128KW":
        case "ECDH-ES+A192KW":
        case "ECDH-ES+A256KW":
          algorithm = { name: "ECDH", namedCurve: jwk.crv };
          keyUsages = jwk.d ? ["deriveBits"] : [];
          break;
        default:
          throw new JOSENotSupported('Invalid or unsupported JWK "alg" (Algorithm) Parameter value');
      }
      break;
    }
    case "OKP": {
      switch (jwk.alg) {
        case "Ed25519":
        // Fall through
        case "EdDSA":
          algorithm = { name: "Ed25519" };
          keyUsages = jwk.d ? ["sign"] : ["verify"];
          break;
        case "ECDH-ES":
        case "ECDH-ES+A128KW":
        case "ECDH-ES+A192KW":
        case "ECDH-ES+A256KW":
          algorithm = { name: jwk.crv };
          keyUsages = jwk.d ? ["deriveBits"] : [];
          break;
        default:
          throw new JOSENotSupported('Invalid or unsupported JWK "alg" (Algorithm) Parameter value');
      }
      break;
    }
    default:
      throw new JOSENotSupported('Invalid or unsupported JWK "kty" (Key Type) Parameter value');
  }
  return { algorithm, keyUsages };
}
var jwk_to_key_default = async (jwk) => {
  if (!jwk.alg) {
    throw new TypeError('"alg" argument is required when "jwk.alg" is not present');
  }
  const { algorithm, keyUsages } = subtleMapping(jwk);
  const keyData = { ...jwk };
  delete keyData.alg;
  delete keyData.use;
  return crypto.subtle.importKey(
    "jwk",
    keyData,
    algorithm,
    jwk.ext ?? (jwk.d ? false : true),
    jwk.key_ops ?? keyUsages
  );
};

// src/key/import.ts
async function importJWK(jwk, alg, options) {
  if (!is_object_default(jwk)) {
    throw new TypeError("JWK must be an object");
  }
  let ext;
  alg ??= jwk.alg;
  ext ??= options?.extractable ?? jwk.ext;
  switch (jwk.kty) {
    case "oct":
      if (typeof jwk.k !== "string" || !jwk.k) {
        throw new TypeError('missing "k" (Key Value) Parameter value');
      }
      return decode(jwk.k);
    case "RSA":
      if ("oth" in jwk && jwk.oth !== void 0) {
        throw new JOSENotSupported(
          'RSA JWK "oth" (Other Primes Info) Parameter value is not supported'
        );
      }
    case "EC":
    case "OKP":
      return jwk_to_key_default({ ...jwk, alg, ext });
    default:
      throw new JOSENotSupported('Unsupported "kty" (Key Type) Parameter value');
  }
}

// src/lib/aesgcmkw.ts
async function unwrap3(alg, key, encryptedKey, iv, tag2) {
  const jweAlgorithm = alg.slice(0, 7);
  return decrypt_default(jweAlgorithm, key, encryptedKey, iv, tag2, new Uint8Array(0));
}

// src/lib/decrypt_key_management.ts
var decrypt_key_management_default = async (alg, key, encryptedKey, joseHeader, options) => {
  switch (alg) {
    case "dir": {
      if (encryptedKey !== void 0)
        throw new JWEInvalid("Encountered unexpected JWE Encrypted Key");
      return key;
    }
    case "ECDH-ES":
      if (encryptedKey !== void 0)
        throw new JWEInvalid("Encountered unexpected JWE Encrypted Key");
    case "ECDH-ES+A128KW":
    case "ECDH-ES+A192KW":
    case "ECDH-ES+A256KW": {
      if (!is_object_default(joseHeader.epk))
        throw new JWEInvalid(`JOSE Header "epk" (Ephemeral Public Key) missing or invalid`);
      assertCryptoKey(key);
      if (!allowed(key))
        throw new JOSENotSupported(
          "ECDH with the provided key is not allowed or not supported by your javascript runtime"
        );
      const epk = await importJWK(joseHeader.epk, alg);
      assertCryptoKey(epk);
      let partyUInfo;
      let partyVInfo;
      if (joseHeader.apu !== void 0) {
        if (typeof joseHeader.apu !== "string")
          throw new JWEInvalid(`JOSE Header "apu" (Agreement PartyUInfo) invalid`);
        try {
          partyUInfo = decode(joseHeader.apu);
        } catch {
          throw new JWEInvalid("Failed to base64url decode the apu");
        }
      }
      if (joseHeader.apv !== void 0) {
        if (typeof joseHeader.apv !== "string")
          throw new JWEInvalid(`JOSE Header "apv" (Agreement PartyVInfo) invalid`);
        try {
          partyVInfo = decode(joseHeader.apv);
        } catch {
          throw new JWEInvalid("Failed to base64url decode the apv");
        }
      }
      const sharedSecret = await deriveKey(
        epk,
        key,
        alg === "ECDH-ES" ? joseHeader.enc : alg,
        alg === "ECDH-ES" ? bitLength2(joseHeader.enc) : parseInt(alg.slice(-5, -2), 10),
        partyUInfo,
        partyVInfo
      );
      if (alg === "ECDH-ES") return sharedSecret;
      if (encryptedKey === void 0) throw new JWEInvalid("JWE Encrypted Key missing");
      return unwrap(alg.slice(-6), sharedSecret, encryptedKey);
    }
    case "RSA-OAEP":
    case "RSA-OAEP-256":
    case "RSA-OAEP-384":
    case "RSA-OAEP-512": {
      if (encryptedKey === void 0) throw new JWEInvalid("JWE Encrypted Key missing");
      assertCryptoKey(key);
      return decrypt(alg, key, encryptedKey);
    }
    case "PBES2-HS256+A128KW":
    case "PBES2-HS384+A192KW":
    case "PBES2-HS512+A256KW": {
      if (encryptedKey === void 0) throw new JWEInvalid("JWE Encrypted Key missing");
      if (typeof joseHeader.p2c !== "number")
        throw new JWEInvalid(`JOSE Header "p2c" (PBES2 Count) missing or invalid`);
      const p2cLimit = options?.maxPBES2Count || 1e4;
      if (joseHeader.p2c > p2cLimit)
        throw new JWEInvalid(`JOSE Header "p2c" (PBES2 Count) out is of acceptable bounds`);
      if (typeof joseHeader.p2s !== "string")
        throw new JWEInvalid(`JOSE Header "p2s" (PBES2 Salt) missing or invalid`);
      let p2s;
      try {
        p2s = decode(joseHeader.p2s);
      } catch {
        throw new JWEInvalid("Failed to base64url decode the p2s");
      }
      return unwrap2(alg, key, encryptedKey, joseHeader.p2c, p2s);
    }
    case "A128KW":
    case "A192KW":
    case "A256KW": {
      if (encryptedKey === void 0) throw new JWEInvalid("JWE Encrypted Key missing");
      return unwrap(alg, key, encryptedKey);
    }
    case "A128GCMKW":
    case "A192GCMKW":
    case "A256GCMKW": {
      if (encryptedKey === void 0) throw new JWEInvalid("JWE Encrypted Key missing");
      if (typeof joseHeader.iv !== "string")
        throw new JWEInvalid(`JOSE Header "iv" (Initialization Vector) missing or invalid`);
      if (typeof joseHeader.tag !== "string")
        throw new JWEInvalid(`JOSE Header "tag" (Authentication Tag) missing or invalid`);
      let iv;
      try {
        iv = decode(joseHeader.iv);
      } catch {
        throw new JWEInvalid("Failed to base64url decode the iv");
      }
      let tag2;
      try {
        tag2 = decode(joseHeader.tag);
      } catch {
        throw new JWEInvalid("Failed to base64url decode the tag");
      }
      return unwrap3(alg, key, encryptedKey, iv, tag2);
    }
    default: {
      throw new JOSENotSupported('Invalid or unsupported "alg" (JWE Algorithm) header value');
    }
  }
};

// src/lib/validate_crit.ts
var validate_crit_default = (Err, recognizedDefault, recognizedOption, protectedHeader, joseHeader) => {
  if (joseHeader.crit !== void 0 && protectedHeader?.crit === void 0) {
    throw new Err('"crit" (Critical) Header Parameter MUST be integrity protected');
  }
  if (!protectedHeader || protectedHeader.crit === void 0) {
    return /* @__PURE__ */ new Set();
  }
  if (!Array.isArray(protectedHeader.crit) || protectedHeader.crit.length === 0 || protectedHeader.crit.some((input) => typeof input !== "string" || input.length === 0)) {
    throw new Err(
      '"crit" (Critical) Header Parameter MUST be an array of non-empty strings when present'
    );
  }
  let recognized;
  if (recognizedOption !== void 0) {
    recognized = new Map([...Object.entries(recognizedOption), ...recognizedDefault.entries()]);
  } else {
    recognized = recognizedDefault;
  }
  for (const parameter of protectedHeader.crit) {
    if (!recognized.has(parameter)) {
      throw new JOSENotSupported(`Extension Header Parameter "${parameter}" is not recognized`);
    }
    if (joseHeader[parameter] === void 0) {
      throw new Err(`Extension Header Parameter "${parameter}" is missing`);
    }
    if (recognized.get(parameter) && protectedHeader[parameter] === void 0) {
      throw new Err(`Extension Header Parameter "${parameter}" MUST be integrity protected`);
    }
  }
  return new Set(protectedHeader.crit);
};

// src/lib/validate_algorithms.ts
var validate_algorithms_default = (option, algorithms) => {
  if (algorithms !== void 0 && (!Array.isArray(algorithms) || algorithms.some((s) => typeof s !== "string"))) {
    throw new TypeError(`"${option}" option must be an array of strings`);
  }
  if (!algorithms) {
    return void 0;
  }
  return new Set(algorithms);
};

// src/lib/is_jwk.ts
function isJWK(key) {
  return is_object_default(key) && typeof key.kty === "string";
}
function isPrivateJWK(key) {
  return key.kty !== "oct" && typeof key.d === "string";
}
function isPublicJWK(key) {
  return key.kty !== "oct" && typeof key.d === "undefined";
}
function isSecretJWK(key) {
  return key.kty === "oct" && typeof key.k === "string";
}

// src/lib/normalize_key.ts
var cache;
var handleJWK = async (key, jwk, alg, freeze = false) => {
  cache ||= /* @__PURE__ */ new WeakMap();
  let cached = cache.get(key);
  if (cached?.[alg]) {
    return cached[alg];
  }
  const cryptoKey = await jwk_to_key_default({ ...jwk, alg });
  if (freeze) Object.freeze(key);
  if (!cached) {
    cache.set(key, { [alg]: cryptoKey });
  } else {
    cached[alg] = cryptoKey;
  }
  return cryptoKey;
};
var handleKeyObject = (keyObject, alg) => {
  cache ||= /* @__PURE__ */ new WeakMap();
  let cached = cache.get(keyObject);
  if (cached?.[alg]) {
    return cached[alg];
  }
  const isPublic = keyObject.type === "public";
  const extractable = isPublic ? true : false;
  let cryptoKey;
  if (keyObject.asymmetricKeyType === "x25519") {
    switch (alg) {
      case "ECDH-ES":
      case "ECDH-ES+A128KW":
      case "ECDH-ES+A192KW":
      case "ECDH-ES+A256KW":
        break;
      default:
        throw new TypeError("given KeyObject instance cannot be used for this algorithm");
    }
    cryptoKey = keyObject.toCryptoKey(
      keyObject.asymmetricKeyType,
      extractable,
      isPublic ? [] : ["deriveBits"]
    );
  }
  if (keyObject.asymmetricKeyType === "ed25519") {
    if (alg !== "EdDSA" && alg !== "Ed25519") {
      throw new TypeError("given KeyObject instance cannot be used for this algorithm");
    }
    cryptoKey = keyObject.toCryptoKey(keyObject.asymmetricKeyType, extractable, [
      isPublic ? "verify" : "sign"
    ]);
  }
  if (keyObject.asymmetricKeyType === "rsa") {
    let hash;
    switch (alg) {
      case "RSA-OAEP":
        hash = "SHA-1";
        break;
      case "RS256":
      case "PS256":
      case "RSA-OAEP-256":
        hash = "SHA-256";
        break;
      case "RS384":
      case "PS384":
      case "RSA-OAEP-384":
        hash = "SHA-384";
        break;
      case "RS512":
      case "PS512":
      case "RSA-OAEP-512":
        hash = "SHA-512";
        break;
      default:
        throw new TypeError("given KeyObject instance cannot be used for this algorithm");
    }
    if (alg.startsWith("RSA-OAEP")) {
      return keyObject.toCryptoKey(
        {
          name: "RSA-OAEP",
          hash
        },
        extractable,
        isPublic ? ["encrypt"] : ["decrypt"]
      );
    }
    cryptoKey = keyObject.toCryptoKey(
      {
        name: alg.startsWith("PS") ? "RSA-PSS" : "RSASSA-PKCS1-v1_5",
        hash
      },
      extractable,
      [isPublic ? "verify" : "sign"]
    );
  }
  if (keyObject.asymmetricKeyType === "ec") {
    const nist = /* @__PURE__ */ new Map([
      ["prime256v1", "P-256"],
      ["secp384r1", "P-384"],
      ["secp521r1", "P-521"]
    ]);
    const namedCurve = nist.get(keyObject.asymmetricKeyDetails?.namedCurve);
    if (!namedCurve) {
      throw new TypeError("given KeyObject instance cannot be used for this algorithm");
    }
    if (alg === "ES256" && namedCurve === "P-256") {
      cryptoKey = keyObject.toCryptoKey(
        {
          name: "ECDSA",
          namedCurve
        },
        extractable,
        [isPublic ? "verify" : "sign"]
      );
    }
    if (alg === "ES384" && namedCurve === "P-384") {
      cryptoKey = keyObject.toCryptoKey(
        {
          name: "ECDSA",
          namedCurve
        },
        extractable,
        [isPublic ? "verify" : "sign"]
      );
    }
    if (alg === "ES512" && namedCurve === "P-521") {
      cryptoKey = keyObject.toCryptoKey(
        {
          name: "ECDSA",
          namedCurve
        },
        extractable,
        [isPublic ? "verify" : "sign"]
      );
    }
    if (alg.startsWith("ECDH-ES")) {
      cryptoKey = keyObject.toCryptoKey(
        {
          name: "ECDH",
          namedCurve
        },
        extractable,
        isPublic ? [] : ["deriveBits"]
      );
    }
  }
  if (!cryptoKey) {
    throw new TypeError("given KeyObject instance cannot be used for this algorithm");
  }
  if (!cached) {
    cache.set(keyObject, { [alg]: cryptoKey });
  } else {
    cached[alg] = cryptoKey;
  }
  return cryptoKey;
};
var normalize_key_default = async (key, alg) => {
  if (key instanceof Uint8Array) {
    return key;
  }
  if (isCryptoKey(key)) {
    return key;
  }
  if (isKeyObject(key)) {
    if (key.type === "secret") {
      return key.export();
    }
    if ("toCryptoKey" in key && typeof key.toCryptoKey === "function") {
      try {
        return handleKeyObject(key, alg);
      } catch (err) {
        if (err instanceof TypeError) {
          throw err;
        }
      }
    }
    let jwk = key.export({ format: "jwk" });
    return handleJWK(key, jwk, alg);
  }
  if (isJWK(key)) {
    if (key.k) {
      return decode(key.k);
    }
    return handleJWK(key, key, alg, true);
  }
  throw new Error("unreachable");
};

// src/lib/check_key_type.ts
var tag = (key) => key?.[Symbol.toStringTag];
var jwkMatchesOp = (alg, key, usage) => {
  if (key.use !== void 0) {
    let expected;
    switch (usage) {
      case "sign":
      case "verify":
        expected = "sig";
        break;
      case "encrypt":
      case "decrypt":
        expected = "enc";
        break;
    }
    if (key.use !== expected) {
      throw new TypeError(
        `Invalid key for this operation, its "use" must be "${expected}" when present`
      );
    }
  }
  if (key.alg !== void 0 && key.alg !== alg) {
    throw new TypeError(`Invalid key for this operation, its "alg" must be "${alg}" when present`);
  }
  if (Array.isArray(key.key_ops)) {
    let expectedKeyOp;
    switch (true) {
      case (usage === "sign" || usage === "verify"):
      // Fall through
      case alg === "dir":
      // Fall through
      case alg.includes("CBC-HS"):
        expectedKeyOp = usage;
        break;
      case alg.startsWith("PBES2"):
        expectedKeyOp = "deriveBits";
        break;
      case /^A\d{3}(?:GCM)?(?:KW)?$/.test(alg):
        if (!alg.includes("GCM") && alg.endsWith("KW")) {
          expectedKeyOp = usage === "encrypt" ? "wrapKey" : "unwrapKey";
        } else {
          expectedKeyOp = usage;
        }
        break;
      case (usage === "encrypt" && alg.startsWith("RSA")):
        expectedKeyOp = "wrapKey";
        break;
      case usage === "decrypt":
        expectedKeyOp = alg.startsWith("RSA") ? "unwrapKey" : "deriveBits";
        break;
    }
    if (expectedKeyOp && key.key_ops?.includes?.(expectedKeyOp) === false) {
      throw new TypeError(
        `Invalid key for this operation, its "key_ops" must include "${expectedKeyOp}" when present`
      );
    }
  }
  return true;
};
var symmetricTypeCheck = (alg, key, usage) => {
  if (key instanceof Uint8Array) return;
  if (isJWK(key)) {
    if (isSecretJWK(key) && jwkMatchesOp(alg, key, usage)) return;
    throw new TypeError(
      `JSON Web Key for symmetric algorithms must have JWK "kty" (Key Type) equal to "oct" and the JWK "k" (Key Value) present`
    );
  }
  if (!is_key_like_default(key)) {
    throw new TypeError(
      withAlg(alg, key, "CryptoKey", "KeyObject", "JSON Web Key", "Uint8Array")
    );
  }
  if (key.type !== "secret") {
    throw new TypeError(`${tag(key)} instances for symmetric algorithms must be of type "secret"`);
  }
};
var asymmetricTypeCheck = (alg, key, usage) => {
  if (isJWK(key)) {
    switch (usage) {
      case "decrypt":
      case "sign":
        if (isPrivateJWK(key) && jwkMatchesOp(alg, key, usage)) return;
        throw new TypeError(`JSON Web Key for this operation be a private JWK`);
      case "encrypt":
      case "verify":
        if (isPublicJWK(key) && jwkMatchesOp(alg, key, usage)) return;
        throw new TypeError(`JSON Web Key for this operation be a public JWK`);
    }
  }
  if (!is_key_like_default(key)) {
    throw new TypeError(withAlg(alg, key, "CryptoKey", "KeyObject", "JSON Web Key"));
  }
  if (key.type === "secret") {
    throw new TypeError(
      `${tag(key)} instances for asymmetric algorithms must not be of type "secret"`
    );
  }
  if (key.type === "public") {
    switch (usage) {
      case "sign":
        throw new TypeError(
          `${tag(key)} instances for asymmetric algorithm signing must be of type "private"`
        );
      case "decrypt":
        throw new TypeError(
          `${tag(key)} instances for asymmetric algorithm decryption must be of type "private"`
        );
      default:
        break;
    }
  }
  if (key.type === "private") {
    switch (usage) {
      case "verify":
        throw new TypeError(
          `${tag(key)} instances for asymmetric algorithm verifying must be of type "public"`
        );
      case "encrypt":
        throw new TypeError(
          `${tag(key)} instances for asymmetric algorithm encryption must be of type "public"`
        );
      default:
        break;
    }
  }
};
var check_key_type_default = (alg, key, usage) => {
  const symmetric = alg.startsWith("HS") || alg === "dir" || alg.startsWith("PBES2") || /^A(?:128|192|256)(?:GCM)?(?:KW)?$/.test(alg) || /^A(?:128|192|256)CBC-HS(?:256|384|512)$/.test(alg);
  if (symmetric) {
    symmetricTypeCheck(alg, key, usage);
  } else {
    asymmetricTypeCheck(alg, key, usage);
  }
};

// src/jwe/flattened/decrypt.ts
async function flattenedDecrypt(jwe, key, options) {
  if (!is_object_default(jwe)) {
    throw new JWEInvalid("Flattened JWE must be an object");
  }
  if (jwe.protected === void 0 && jwe.header === void 0 && jwe.unprotected === void 0) {
    throw new JWEInvalid("JOSE Header missing");
  }
  if (jwe.iv !== void 0 && typeof jwe.iv !== "string") {
    throw new JWEInvalid("JWE Initialization Vector incorrect type");
  }
  if (typeof jwe.ciphertext !== "string") {
    throw new JWEInvalid("JWE Ciphertext missing or incorrect type");
  }
  if (jwe.tag !== void 0 && typeof jwe.tag !== "string") {
    throw new JWEInvalid("JWE Authentication Tag incorrect type");
  }
  if (jwe.protected !== void 0 && typeof jwe.protected !== "string") {
    throw new JWEInvalid("JWE Protected Header incorrect type");
  }
  if (jwe.encrypted_key !== void 0 && typeof jwe.encrypted_key !== "string") {
    throw new JWEInvalid("JWE Encrypted Key incorrect type");
  }
  if (jwe.aad !== void 0 && typeof jwe.aad !== "string") {
    throw new JWEInvalid("JWE AAD incorrect type");
  }
  if (jwe.header !== void 0 && !is_object_default(jwe.header)) {
    throw new JWEInvalid("JWE Shared Unprotected Header incorrect type");
  }
  if (jwe.unprotected !== void 0 && !is_object_default(jwe.unprotected)) {
    throw new JWEInvalid("JWE Per-Recipient Unprotected Header incorrect type");
  }
  let parsedProt;
  if (jwe.protected) {
    try {
      const protectedHeader2 = decode(jwe.protected);
      parsedProt = JSON.parse(decoder.decode(protectedHeader2));
    } catch {
      throw new JWEInvalid("JWE Protected Header is invalid");
    }
  }
  if (!is_disjoint_default(parsedProt, jwe.header, jwe.unprotected)) {
    throw new JWEInvalid(
      "JWE Protected, JWE Unprotected Header, and JWE Per-Recipient Unprotected Header Parameter names must be disjoint"
    );
  }
  const joseHeader = {
    ...parsedProt,
    ...jwe.header,
    ...jwe.unprotected
  };
  validate_crit_default(JWEInvalid, /* @__PURE__ */ new Map(), options?.crit, parsedProt, joseHeader);
  if (joseHeader.zip !== void 0) {
    throw new JOSENotSupported(
      'JWE "zip" (Compression Algorithm) Header Parameter is not supported.'
    );
  }
  const { alg, enc } = joseHeader;
  if (typeof alg !== "string" || !alg) {
    throw new JWEInvalid("missing JWE Algorithm (alg) in JWE Header");
  }
  if (typeof enc !== "string" || !enc) {
    throw new JWEInvalid("missing JWE Encryption Algorithm (enc) in JWE Header");
  }
  const keyManagementAlgorithms = options && validate_algorithms_default("keyManagementAlgorithms", options.keyManagementAlgorithms);
  const contentEncryptionAlgorithms = options && validate_algorithms_default("contentEncryptionAlgorithms", options.contentEncryptionAlgorithms);
  if (keyManagementAlgorithms && !keyManagementAlgorithms.has(alg) || !keyManagementAlgorithms && alg.startsWith("PBES2")) {
    throw new JOSEAlgNotAllowed('"alg" (Algorithm) Header Parameter value not allowed');
  }
  if (contentEncryptionAlgorithms && !contentEncryptionAlgorithms.has(enc)) {
    throw new JOSEAlgNotAllowed('"enc" (Encryption Algorithm) Header Parameter value not allowed');
  }
  let encryptedKey;
  if (jwe.encrypted_key !== void 0) {
    try {
      encryptedKey = decode(jwe.encrypted_key);
    } catch {
      throw new JWEInvalid("Failed to base64url decode the encrypted_key");
    }
  }
  let resolvedKey = false;
  if (typeof key === "function") {
    key = await key(parsedProt, jwe);
    resolvedKey = true;
  }
  check_key_type_default(alg === "dir" ? enc : alg, key, "decrypt");
  const k = await normalize_key_default(key, alg);
  let cek;
  try {
    cek = await decrypt_key_management_default(alg, k, encryptedKey, joseHeader, options);
  } catch (err) {
    if (err instanceof TypeError || err instanceof JWEInvalid || err instanceof JOSENotSupported) {
      throw err;
    }
    cek = cek_default(enc);
  }
  let iv;
  let tag2;
  if (jwe.iv !== void 0) {
    try {
      iv = decode(jwe.iv);
    } catch {
      throw new JWEInvalid("Failed to base64url decode the iv");
    }
  }
  if (jwe.tag !== void 0) {
    try {
      tag2 = decode(jwe.tag);
    } catch {
      throw new JWEInvalid("Failed to base64url decode the tag");
    }
  }
  const protectedHeader = encoder.encode(jwe.protected ?? "");
  let additionalData;
  if (jwe.aad !== void 0) {
    additionalData = concat(protectedHeader, encoder.encode("."), encoder.encode(jwe.aad));
  } else {
    additionalData = protectedHeader;
  }
  let ciphertext;
  try {
    ciphertext = decode(jwe.ciphertext);
  } catch {
    throw new JWEInvalid("Failed to base64url decode the ciphertext");
  }
  const plaintext = await decrypt_default(enc, cek, ciphertext, iv, tag2, additionalData);
  const result = { plaintext };
  if (jwe.protected !== void 0) {
    result.protectedHeader = parsedProt;
  }
  if (jwe.aad !== void 0) {
    try {
      result.additionalAuthenticatedData = decode(jwe.aad);
    } catch {
      throw new JWEInvalid("Failed to base64url decode the aad");
    }
  }
  if (jwe.unprotected !== void 0) {
    result.sharedUnprotectedHeader = jwe.unprotected;
  }
  if (jwe.header !== void 0) {
    result.unprotectedHeader = jwe.header;
  }
  if (resolvedKey) {
    return { ...result, key: k };
  }
  return result;
}

// src/jwe/compact/decrypt.ts
async function compactDecrypt(jwe, key, options) {
  if (jwe instanceof Uint8Array) {
    jwe = decoder.decode(jwe);
  }
  if (typeof jwe !== "string") {
    throw new JWEInvalid("Compact JWE must be a string or Uint8Array");
  }
  const {
    0: protectedHeader,
    1: encryptedKey,
    2: iv,
    3: ciphertext,
    4: tag2,
    length
  } = jwe.split(".");
  if (length !== 5) {
    throw new JWEInvalid("Invalid Compact JWE");
  }
  const decrypted = await flattenedDecrypt(
    {
      ciphertext,
      iv: iv || void 0,
      protected: protectedHeader,
      tag: tag2 || void 0,
      encrypted_key: encryptedKey || void 0
    },
    key,
    options
  );
  const result = { plaintext: decrypted.plaintext, protectedHeader: decrypted.protectedHeader };
  if (typeof key === "function") {
    return { ...result, key: decrypted.key };
  }
  return result;
}
export {
  compactDecrypt
};