INNER CODE UNIT · TypeScript

decrypt

ecies/js · src/index.ts:50

export function decrypt(
  receiverRawSK: string | Uint8Array,
  data: Uint8Array,
  config: Config = ECIES_CONFIG
): Uint8Array {
  const curve = config.ellipticCurve;

  const receiverSK =
    receiverRawSK instanceof Uint8Array
      ? new PrivateKey(receiverRawSK, curve)
      : PrivateKey.fromHex(receiverRawSK, curve);

  const keySize = config.ephemeralKeySize;
  const ephemeralPK = new PublicKey(data.subarray(0, keySize), curve);
  const encrypted = data.subarray(keySize);
  const sharedKey = ephemeralPK.decapsulate(receiverSK, config.isHkdfKeyCompressed);
  return symDecrypt(config, sharedKey, encrypted);
}

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