encryptBlock method

@override List<int> encryptBlock(List<int> src, [ List<int>? dst ])

Encrypt block

Parameters:

• src: The source block of plaintext to be encrypted, which must have a length of 16 bytes.
• dst: An optional destination block to store the encrypted ciphertext. If not provided, a new block is created.

Throws:

• ArgumentException if the source or destination block size is not 16 bytes.
• CryptoException if the encryption key is not available, indicating that the instance is not properly initialized.

Implementation

@override
List<int> encryptBlock(List<int> src, [List<int>? dst]) {
  final out = dst ?? List<int>.filled(blockSize, 0);
  if (src.length != blockSize) {
    throw ArgumentException.invalidOperationArguments(
      "encryptBlock",
      name: "src",
      reason: "Invalid source bytes length.",
    );
  }
  if (out.length != blockSize) {
    throw ArgumentException.invalidOperationArguments(
      "encryptBlock",
      name: "dst",
      reason: "Invalid destination bytes length.",
    );
  }

  if (_encKey == null) {
    throw CryptoException.failed(
      "encryptBlock",
      reason: "Encryption key is not available.",
    );
  }
  _lib.encryptBlock(_encKey!, src.asBytes, out);

  return out;
}