@hiero-ledger/cryptography/lib/Ed25519PublicKey.cjs

Cryptographic utilities and primitives for the Hiero SDK

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _Key = _interopRequireDefault(require("./Key.cjs"));
var _BadKeyError = _interopRequireDefault(require("./BadKeyError.cjs"));
var _tweetnacl = _interopRequireDefault(require("tweetnacl"));
var _array = require("./util/array.cjs");
var hex = _interopRequireWildcard(require("./encoding/hex.cjs"));
function _interopRequireWildcard(e, t) { if ("function" == typeof WeakMap) var r = new WeakMap(), n = new WeakMap(); return (_interopRequireWildcard = function (e, t) { if (!t && e && e.__esModule) return e; var o, i, f = { __proto__: null, default: e }; if (null === e || "object" != typeof e && "function" != typeof e) return f; if (o = t ? n : r) { if (o.has(e)) return o.get(e); o.set(e, f); } for (const t in e) "default" !== t && {}.hasOwnProperty.call(e, t) && ((i = (o = Object.defineProperty) && Object.getOwnPropertyDescriptor(e, t)) && (i.get || i.set) ? o(f, t, i) : f[t] = e[t]); return f; })(e, t); }
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
const derPrefix = "302a300506032b6570032100";
const derPrefixBytes = hex.decode(derPrefix);

/**
 * An public key on the Hedera™ network.
 */
class Ed25519PublicKey extends _Key.default {
  /**
   * @internal
   * @hideconstructor
   * @param {Uint8Array} keyData
   */
  constructor(keyData) {
    super();

    /**
     * @type {Uint8Array}
     * @private
     * @readonly
     */
    this._keyData = keyData;
  }

  /**
   * @returns {string}
   */
  get _type() {
    return "ED25519";
  }

  /**
   * @param {Uint8Array} data
   * @returns {Ed25519PublicKey}
   */
  static fromBytes(data) {
    switch (data.length) {
      case 32:
        return Ed25519PublicKey.fromBytesRaw(data);
      case 44:
        return Ed25519PublicKey.fromBytesDer(data);
      default:
        throw new _BadKeyError.default(`invalid public key length: ${data.length} bytes`);
    }
  }

  /**
   * @param {Uint8Array} data
   * @returns {Ed25519PublicKey}
   */
  static fromBytesDer(data) {
    try {
      // Verify minimum length (44 bytes is standard for Ed25519 public key in DER)
      if (data.length !== 44) {
        throw new Error(`invalid length: ${data.length} bytes`);
      }
      const actualPrefix = data.subarray(0, 12);
      if (!actualPrefix.every((byte, i) => byte === derPrefixBytes[i])) {
        throw new Error("invalid DER prefix");
      }
      // Extract the public key (last 32 bytes)
      const publicKey = data.subarray(12);
      return new Ed25519PublicKey(publicKey);
    } catch (error) {
      throw new _BadKeyError.default(`cannot decode ED25519 public key data from DER format: ${error instanceof Error ? error.message : "unknown error"}`);
    }
  }

  /**
   * @param {Uint8Array} data
   * @returns {Ed25519PublicKey}
   */
  static fromBytesRaw(data) {
    if (data.length != 32) {
      throw new _BadKeyError.default(`invalid public key length: ${data.length} bytes`);
    }
    return new Ed25519PublicKey(data);
  }

  /**
   * Parse a public key from a string of hexadecimal digits.
   *
   * The public key may optionally be prefixed with
   * the DER header.
   * @param {string} text
   * @returns {Ed25519PublicKey}
   */
  static fromString(text) {
    return Ed25519PublicKey.fromBytes(hex.decode(text));
  }

  /**
   * Verify a signature on a message with this public key.
   * @param {Uint8Array} message
   * @param {Uint8Array} signature
   * @returns {boolean}
   */
  verify(message, signature) {
    return _tweetnacl.default.sign.detached.verify(message, signature, this._keyData);
  }

  /**
   * @returns {Uint8Array}
   */
  toBytesDer() {
    const bytes = new Uint8Array(derPrefixBytes.length + 32);
    bytes.set(derPrefixBytes, 0);
    bytes.set(this._keyData.subarray(0, 32), derPrefixBytes.length);
    return bytes;
  }

  /**
   * @returns {Uint8Array}
   */
  toBytesRaw() {
    return this._keyData.slice();
  }

  /**
   * @param {Ed25519PublicKey} other
   * @returns {boolean}
   */
  equals(other) {
    return (0, _array.arrayEqual)(this._keyData, other._keyData);
  }
}
exports.default = Ed25519PublicKey;