text: //----------------------------------------------------------------------------
  //
  // TSDuck - The MPEG Transport Stream Toolkit
  // Copyright (c) 2005-2021, Thierry Lelegard
  // All rights reserved.
  //
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are met:
  //
  // 1. Redistributions of source code must retain the above copyright notice,
  //    this list of conditions and the following disclaimer.
  // 2. Redistributions in binary form must reproduce the above copyright
  //    notice, this list of conditions and the following disclaimer in the
  //    documentation and/or other materials provided with the distribution.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  // ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  // LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  // THE POSSIBILITY OF SUCH DAMAGE.
  //
  //----------------------------------------------------------------------------
  //
  //  Electronic Code Book (ECB) mode.
  //  Template class using a BlockCipher subclass as template argument.
  //
  //----------------------------------------------------------------------------
  
  #pragma once
  
  
  //----------------------------------------------------------------------------
  // Encryption in ECB mode.
  //----------------------------------------------------------------------------
  
  template<class CIPHER>
  bool ts::ECB<CIPHER>::encryptImpl(const void* plain, size_t plain_length, void* cipher, size_t cipher_maxsize, size_t* cipher_length)
  {
      if (this->algo == nullptr || plain_length % this->block_size != 0 || cipher_maxsize < plain_length) {
          return false;
      }
      if (cipher_length != nullptr) {
          *cipher_length = plain_length;
      }
  
      const uint8_t* pt = reinterpret_cast<const uint8_t*>(plain);
      uint8_t* ct = reinterpret_cast<uint8_t*>(cipher);
  
      while (plain_length > 0) {
          if (!this->algo->encrypt(pt, this->block_size, ct, this->block_size)) {
              return false;
          }
          ct += this->block_size;
          pt += this->block_size;
          plain_length -= this->block_size;
      }
  
      return true;
  }
  
  
  //----------------------------------------------------------------------------
  // Decryption in ECB mode.
  //----------------------------------------------------------------------------
  
  template<class CIPHER>
  bool ts::ECB<CIPHER>::decryptImpl(const void* cipher, size_t cipher_length, void* plain, size_t plain_maxsize, size_t* plain_length)
  {
      if (this->algo == nullptr || cipher_length % this->block_size != 0 || plain_maxsize < cipher_length) {
          return false;
      }
      if (plain_length != nullptr) {
          *plain_length = cipher_length;
      }
  
      const uint8_t* ct = reinterpret_cast<const uint8_t*>(cipher);
      uint8_t* pt = reinterpret_cast<uint8_t*>(plain);
  
      while (cipher_length > 0) {
          if (!this->algo->decrypt(ct, this->block_size, pt, this->block_size)) {
              return false;
          }
          ct += this->block_size;
          pt += this->block_size;
          cipher_length -= this->block_size;
      }
  
      return true;
  }
  
  
  //----------------------------------------------------------------------------
  // Simple virtual methods.
  //----------------------------------------------------------------------------
  
  template<class CIPHER>
  size_t ts::ECB<CIPHER>::minMessageSize() const
  {
      return this->block_size;
  }
  
  template<class CIPHER>
  bool ts::ECB<CIPHER>::residueAllowed() const
  {
      return false;
  }
  
  template<class CIPHER>
  ts::UString ts::ECB<CIPHER>::name() const
  {
      return this->algo == nullptr ? UString() : this->algo->name() + u"-ECB";
  }
  