encrypt method

@override Uint8List encrypt(Uint8List data, { SSC? ssc, })

Encrypts data to be used in Secure Messaging. data must be padded (if needed) before calling this function. ssc is used as IV for encryption.

Implementation

@override
Uint8List encrypt(Uint8List data, {SSC? ssc}) {
  _log.debug(
      "encrypt: data size: ${data.length}, ssc: ${ssc?.toBytes().hex()}");
  _log.sdVerbose("encrypt: data: ${data.hex()}, KSenc: ${KSenc.hex()}");
  if (ssc == null)
    throw Exception("PACE_SMCipher_AES.encrypt: SSC should not be null");

  //IV = E(KSenc, SCC)
  _log.sdDebug(
      "Encrypting IV with KSenc: ${KSenc.hex()}, ssc: ${ssc.toBytes().hex()}");
  Uint8List iv = cipher.encrypt(
      data: ssc.toBytes(), key: KSenc, mode: BLOCK_CIPHER_MODE.ECB);

  _log.sdVerbose("Encrypted IV: ${iv.hex()}");

  _log.sdDebug("Encrypting data with KSenc: ${KSenc.hex()}, iv: ${iv.hex()}");
  Uint8List encrypted = cipher.encrypt(data: data, key: KSenc, iv: iv);

  _log.sdVerbose("Encrypted data: ${encrypted.hex()}");
  return encrypted;
}