3036348a9257e9a9f34a8424a6f940bd076f540fde06bef2bab54d85fb379311.json raw

   1  {"ast":null,"code":"\"use strict\";\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.hmac = exports.HMAC = void 0;\n/**\n * HMAC: RFC2104 message authentication code.\n * @module\n */\nconst utils_ts_1 = require(\"./utils.js\");\nclass HMAC extends utils_ts_1.Hash {\n  constructor(hash, _key) {\n    super();\n    this.finished = false;\n    this.destroyed = false;\n    (0, utils_ts_1.ahash)(hash);\n    const key = (0, utils_ts_1.toBytes)(_key);\n    this.iHash = hash.create();\n    if (typeof this.iHash.update !== 'function') throw new Error('Expected instance of class which extends utils.Hash');\n    this.blockLen = this.iHash.blockLen;\n    this.outputLen = this.iHash.outputLen;\n    const blockLen = this.blockLen;\n    const pad = new Uint8Array(blockLen);\n    // blockLen can be bigger than outputLen\n    pad.set(key.length > blockLen ? hash.create().update(key).digest() : key);\n    for (let i = 0; i < pad.length; i++) pad[i] ^= 0x36;\n    this.iHash.update(pad);\n    // By doing update (processing of first block) of outer hash here we can re-use it between multiple calls via clone\n    this.oHash = hash.create();\n    // Undo internal XOR && apply outer XOR\n    for (let i = 0; i < pad.length; i++) pad[i] ^= 0x36 ^ 0x5c;\n    this.oHash.update(pad);\n    (0, utils_ts_1.clean)(pad);\n  }\n  update(buf) {\n    (0, utils_ts_1.aexists)(this);\n    this.iHash.update(buf);\n    return this;\n  }\n  digestInto(out) {\n    (0, utils_ts_1.aexists)(this);\n    (0, utils_ts_1.abytes)(out, this.outputLen);\n    this.finished = true;\n    this.iHash.digestInto(out);\n    this.oHash.update(out);\n    this.oHash.digestInto(out);\n    this.destroy();\n  }\n  digest() {\n    const out = new Uint8Array(this.oHash.outputLen);\n    this.digestInto(out);\n    return out;\n  }\n  _cloneInto(to) {\n    // Create new instance without calling constructor since key already in state and we don't know it.\n    to || (to = Object.create(Object.getPrototypeOf(this), {}));\n    const {\n      oHash,\n      iHash,\n      finished,\n      destroyed,\n      blockLen,\n      outputLen\n    } = this;\n    to = to;\n    to.finished = finished;\n    to.destroyed = destroyed;\n    to.blockLen = blockLen;\n    to.outputLen = outputLen;\n    to.oHash = oHash._cloneInto(to.oHash);\n    to.iHash = iHash._cloneInto(to.iHash);\n    return to;\n  }\n  clone() {\n    return this._cloneInto();\n  }\n  destroy() {\n    this.destroyed = true;\n    this.oHash.destroy();\n    this.iHash.destroy();\n  }\n}\nexports.HMAC = HMAC;\n/**\n * HMAC: RFC2104 message authentication code.\n * @param hash - function that would be used e.g. sha256\n * @param key - message key\n * @param message - message data\n * @example\n * import { hmac } from '@noble/hashes/hmac';\n * import { sha256 } from '@noble/hashes/sha2';\n * const mac1 = hmac(sha256, 'key', 'message');\n */\nconst hmac = (hash, key, message) => new HMAC(hash, key).update(message).digest();\nexports.hmac = hmac;\nexports.hmac.create = (hash, key) => new HMAC(hash, key);\n//# sourceMappingURL=hmac.js.map","map":null,"metadata":{},"sourceType":"script","externalDependencies":[]}