update electron to v43

electron/node_modules/@noble/hashes/src/webcrypto.ts

@@ -0,0 +1,239 @@
+import { type Pbkdf2Opt } from './pbkdf2.ts';
+import {
+  abytes,
+  ahash,
+  anumber,
+  checkOpts,
+  kdfInputToBytes,
+  type CHash,
+  type KDFInput,
+  type TArg,
+  type TRet,
+} from './utils.ts';
+
+function _subtle(): typeof crypto.subtle {
+  const cr = typeof globalThis === 'object' ? (globalThis as any).crypto : null;
+  const sb = cr?.subtle;
+  if (typeof sb === 'object' && sb != null) return sb;
+  throw new Error('crypto.subtle must be defined');
+}
+
+/** Callable WebCrypto hash function descriptor. */
+export type WebHash = {
+  /**
+   * Hashes one message with the selected WebCrypto digest.
+   * @param msg - message bytes to hash
+   * @returns Promise resolving to digest bytes.
+   */
+  (msg: TArg<Uint8Array>): Promise<TRet<Uint8Array>>;
+  /** WebCrypto algorithm name passed to `crypto.subtle`. */
+  webCryptoName: string;
+  /** Digest size in bytes. */
+  outputLen: number;
+  /** Input block size in bytes. */
+  blockLen: number;
+};
+
+function createWebHash(name: string, blockLen: number, outputLen: number): TRet<WebHash> {
+  const hashC: any = async (msg: TArg<Uint8Array>): Promise<TRet<Uint8Array>> => {
+    abytes(msg);
+    const crypto = _subtle();
+    return new Uint8Array(await crypto.digest(name, msg as BufferSource)) as TRet<Uint8Array>;
+  };
+  hashC.webCryptoName = name; // make sure it won't interfere with function name
+  hashC.outputLen = outputLen;
+  hashC.blockLen = blockLen;
+  hashC.create = () => {
+    // Present only so this async wrapper satisfies the shared
+    // hash-wrapper shape checked by `ahashWeb()`.
+    throw new Error('not implemented');
+  };
+  // Later WebCrypto HMAC/HKDF/PBKDF2 calls read descriptor metadata directly, so freezing prevents
+  // callers from retargeting a `sha256` wrapper into a different backend digest by mutation.
+  return Object.freeze(hashC) as TRet<WebHash>;
+}
+
+function ahashWeb(hash: TArg<WebHash>) {
+  ahash(hash as unknown as TArg<CHash>);
+  if (typeof hash.webCryptoName !== 'string') throw new Error('non-web hash');
+}
+
+/** WebCrypto SHA1 (RFC 3174) legacy hash function. It was cryptographically broken. */
+// export const sha1: WebHash = createHash('SHA-1', 64, 20);
+
+/**
+ * WebCrypto SHA2-256 hash function from RFC 6234.
+ * @param msg - message bytes to hash
+ * @returns Promise resolving to digest bytes.
+ * @example
+ * Hash a message with WebCrypto SHA2-256.
+ * ```ts
+ * await sha256(new Uint8Array([97, 98, 99]));
+ * ```
+ */
+export const sha256: TRet<WebHash> = /* @__PURE__ */ createWebHash('SHA-256', 64, 32);
+/**
+ * WebCrypto SHA2-384 hash function from RFC 6234.
+ * @param msg - message bytes to hash
+ * @returns Promise resolving to digest bytes.
+ * @example
+ * Hash a message with WebCrypto SHA2-384.
+ * ```ts
+ * await sha384(new Uint8Array([97, 98, 99]));
+ * ```
+ */
+export const sha384: TRet<WebHash> = /* @__PURE__ */ createWebHash('SHA-384', 128, 48);
+/**
+ * WebCrypto SHA2-512 hash function from RFC 6234.
+ * @param msg - message bytes to hash
+ * @returns Promise resolving to digest bytes.
+ * @example
+ * Hash a message with WebCrypto SHA2-512.
+ * ```ts
+ * await sha512(new Uint8Array([97, 98, 99]));
+ * ```
+ */
+export const sha512: TRet<WebHash> = /* @__PURE__ */ createWebHash('SHA-512', 128, 64);
+
+/**
+ * WebCrypto HMAC: RFC2104 message authentication code.
+ * @param hash - function that would be used e.g. sha256. Webcrypto version.
+ * @param key - authentication key bytes
+ * @param message - message bytes to authenticate
+ * @returns Promise resolving to authentication tag bytes.
+ * `.create()` exists only to mirror the synchronous API surface
+ * and always throws `not implemented`.
+ * @example
+ * Compute an RFC 2104 HMAC with WebCrypto.
+ * ```ts
+ * import { hmac, sha256 } from '@noble/hashes/webcrypto.js';
+ * await hmac(sha256, new Uint8Array([1, 2, 3]), new Uint8Array([4, 5, 6]));
+ * ```
+ */
+type WebHmacFn = {
+  (
+    hash: TArg<WebHash>,
+    key: TArg<Uint8Array>,
+    message: TArg<Uint8Array>
+  ): Promise<TRet<Uint8Array>>;
+  create(hash: TArg<WebHash>, key: TArg<Uint8Array>): any;
+};
+export const hmac: TRet<WebHmacFn> = /* @__PURE__ */ (() => {
+  const hmac_ = async (
+    hash: TArg<WebHash>,
+    key: TArg<Uint8Array>,
+    message: TArg<Uint8Array>
+  ): Promise<TRet<Uint8Array>> => {
+    const crypto = _subtle();
+    abytes(key, undefined, 'key');
+    abytes(message, undefined, 'message');
+    ahashWeb(hash);
+    // WebCrypto keys can't be zeroized
+    // prettier-ignore
+    const wkey = await crypto.importKey(
+      'raw',
+      key as BufferSource,
+      { name: 'HMAC', hash: hash.webCryptoName },
+      false,
+      ['sign']
+    );
+    return new Uint8Array(
+      await crypto.sign('HMAC', wkey, message as BufferSource)
+    ) as TRet<Uint8Array>;
+  };
+  hmac_.create = (_hash: TArg<WebHash>, _key: TArg<Uint8Array>) => {
+    throw new Error('not implemented');
+  };
+  return hmac_ as TRet<WebHmacFn>;
+})();
+
+/**
+ * WebCrypto HKDF (RFC 5869): derive keys from an initial input.
+ * Combines hkdf_extract + hkdf_expand in one step
+ * @param hash - hash function that would be used (e.g. sha256). Webcrypto version.
+ * @param ikm - input keying material, the initial key
+ * @param salt - optional salt value (a non-secret random value)
+ * @param info - optional context and application specific information bytes
+ * @param length - length of output keying material in bytes.
+ *   RFC 5869 §2.3 allows `0..255*HashLen`, so `0` requests an empty OKM.
+ * @returns Promise resolving to derived key bytes.
+ * The RFC `L <= 255 * HashLen` bound is currently enforced only by backend
+ * `deriveBits()` rejection, not by an explicit library-side guard.
+ * @throws If the current runtime does not provide `crypto.subtle`. {@link Error}
+ * @example
+ * WebCrypto HKDF (RFC 5869): derive keys from an initial input.
+ * ```ts
+ * import { hkdf, sha256 } from '@noble/hashes/webcrypto.js';
+ * import { randomBytes, utf8ToBytes } from '@noble/hashes/utils.js';
+ * const inputKey = randomBytes(32);
+ * const salt = randomBytes(32);
+ * const info = utf8ToBytes('application-key');
+ * const okm = await hkdf(sha256, inputKey, salt, info, 32);
+ * ```
+ */
+export async function hkdf(
+  hash: TArg<WebHash>,
+  ikm: TArg<Uint8Array>,
+  salt: TArg<Uint8Array | undefined>,
+  info: TArg<Uint8Array | undefined>,
+  length: number
+): Promise<TRet<Uint8Array>> {
+  const crypto = _subtle();
+  ahashWeb(hash);
+  abytes(ikm, undefined, 'ikm');
+  anumber(length, 'length');
+  if (salt !== undefined) abytes(salt, undefined, 'salt');
+  if (info !== undefined) abytes(info, undefined, 'info');
+  const wkey = await crypto.importKey('raw', ikm as BufferSource, 'HKDF', false, ['deriveBits']);
+  const opts = {
+    name: 'HKDF',
+    hash: hash.webCryptoName,
+    salt: salt === undefined ? new Uint8Array(0) : salt,
+    info: info === undefined ? new Uint8Array(0) : info,
+  };
+  return new Uint8Array(await crypto.deriveBits(opts, wkey, 8 * length)) as TRet<Uint8Array>;
+}
+
+/**
+ * WebCrypto PBKDF2-HMAC: RFC 8018 key derivation function.
+ * @param hash - hash function that would be used e.g. sha256. Webcrypto version.
+ * @param password - password from which a derived key is generated; string
+ *   inputs are normalized through `kdfInputToBytes()`, i.e. UTF-8
+ * @param salt - cryptographic salt; string inputs are normalized through
+ *   `kdfInputToBytes()`, i.e. UTF-8
+ * @param opts - PBKDF2 work factor and output settings. `dkLen`, if provided,
+ *   must be `>= 1` per RFC 8018 §5.2. See {@link Pbkdf2Opt}.
+ * @returns Promise resolving to derived key bytes.
+ * Positive-iteration enforcement is currently delegated to backend
+ * `deriveBits()` rejection (for example `c = 0`), not a dedicated
+ * library-side guard.
+ * @throws If the current runtime does not provide `crypto.subtle`. {@link Error}
+ * @example
+ * WebCrypto PBKDF2-HMAC: RFC 2898 key derivation function.
+ * ```ts
+ * import { pbkdf2, sha256 } from '@noble/hashes/webcrypto.js';
+ * const key = await pbkdf2(sha256, 'password', 'salt', { dkLen: 32, c: Math.pow(2, 18) });
+ * ```
+ */
+export async function pbkdf2(
+  hash: TArg<WebHash>,
+  password: TArg<KDFInput>,
+  salt: TArg<KDFInput>,
+  opts: Pbkdf2Opt
+): Promise<TRet<Uint8Array>> {
+  const crypto = _subtle();
+  ahashWeb(hash);
+  const _opts = checkOpts({ dkLen: 32 }, opts);
+  const { c, dkLen } = _opts;
+  anumber(c, 'c');
+  anumber(dkLen, 'dkLen');
+  // RFC 8018 §5.2 defines dkLen as a positive integer.
+  if (dkLen < 1) throw new Error('"dkLen" must be >= 1');
+  const _password = kdfInputToBytes(password, 'password');
+  const _salt = kdfInputToBytes(salt, 'salt');
+  const key = await crypto.importKey('raw', _password as BufferSource, 'PBKDF2', false, [
+    'deriveBits',
+  ]);
+  const deriveOpts = { name: 'PBKDF2', salt: _salt, iterations: c, hash: hash.webCryptoName };
+  return new Uint8Array(await crypto.deriveBits(deriveOpts, key, 8 * dkLen)) as TRet<Uint8Array>;
+}