buffer_common.hHeader

Implementation details for encoding and decoding buffers in the antispy SDK library. More...

Detailed Description

The buffer_common.h file provides the low-level implementation details for encoding and decoding operations within the antispy SDK library. These operations are crucial for securely managing and protecting sensitive data by encrypting it both at compile time and runtime. This file contains utility functions that perform the actual encoding and decoding of buffers, ensuring that data remains secure and obfuscated from potential attackers.

Key Features:

  • Compile-Time Encoding and Decoding :

    • The file includes templates for encoding and decoding buffers at compile time. These functions utilize encryption keys and indices to transform the original data into an encoded format, ensuring that sensitive information is protected even before the program is executed.

  • Runtime Encoding and Decoding :

    • In addition to compile-time operations, the file provides runtime functions for encoding and decoding buffers. These functions are essential for scenarios where data must be encrypted or decrypted during program execution, offering flexibility in handling dynamic data securely.

  • Security Focus :

    • The encoding and decoding processes are designed with security in mind. By applying encryption to each byte of the buffer, the file ensures that data is not easily accessible or readable in its stored form. The use of encryption keys and indices adds a layer of obfuscation, making it challenging to reverse-engineer or tamper with the data.

Detailed Description:

Namespaces:

  • libantispy::detail::buffer :
    • This namespace contains all the encoding and decoding functions. It is part of the antispy SDK library's internal implementation and is not intended for direct use by end-users. The functions within this namespace provide the core logic for securely managing buffers.

Functions:

  • encode (Compile-Time) :

    • This template function encodes a buffer at compile time by encrypting each byte using a provided key and index. It returns a const_array containing the encoded buffer.

    • Template Parameters :

      • T : The type of the buffer (typically char ).

      • Key : The encryption key used to encode the buffer.

      • N : The indices of the bytes in the buffer, provided as a parameter pack.

    • Parameters :

      • c : A pointer to the buffer to be encoded.

      • std::index_sequence<N...> : A compile-time sequence representing the indices of the buffer's bytes.

    • Returns : A const_array<T, sizeof...(N)> containing the encoded buffer.

  • encode (Runtime) :

    • This function encodes a buffer at runtime by encrypting each byte using a provided key and index. It returns a vector of char containing the encoded buffer.

    • Parameters :

      • c : A pointer to the buffer to be encoded.

      • Key : The encryption key used to encode the buffer.

      • N : The length of the buffer.

    • Returns : A std::vector<char> containing the encoded buffer.

  • decode (Compile-Time) :

    • This template function decodes a buffer at compile time by decrypting each byte using a provided key and index. It returns a const_array containing the decoded buffer.

    • Template Parameters :

      • T : The type of the buffer (typically char ).

      • Key : The encryption key used to decode the buffer.

      • N : The indices of the bytes in the buffer, provided as a parameter pack.

    • Parameters :

      • c : A pointer to the encoded buffer.

      • std::index_sequence<N...> : A compile-time sequence representing the indices of the buffer's bytes.

    • Returns : A const_array<T, sizeof...(N)> containing the decoded buffer.

  • decode (Runtime) :

    • This function decodes a buffer at runtime by decrypting each byte using a provided key and index. It returns a vector of char containing the decoded buffer.

    • Parameters :

      • c : A pointer to the encoded buffer.

      • Key : The encryption key used to decode the buffer.

      • N : The length of the buffer.

    • Returns : A std::vector<char> containing the decoded buffer.

Security Considerations:

  • The functions provided in this file are designed to securely encrypt and decrypt data buffers. By leveraging compile-time encryption for static buffers and runtime encryption for dynamic data, the antispy SDK library ensures that sensitive information is protected against unauthorized access and reverse engineering.

Usage:

  • These functions are not intended to be used directly by end-users but are rather utilized internally within the antispy SDK library's classes and macros, such as const_buffer and buffer .

Dependencies:

  • const_array :

    • The file relies on the const_array class to store the encoded and decoded buffers, ensuring that the data remains immutable and secure.

  • encryptor :

    • The encryptor class template is used within the encode and decode functions to perform the actual encryption and decryption operations.

Conclusion:

The buffer_common.h file is a critical component of the antispy SDK library, providing the underlying mechanisms for securely encoding and decoding data buffers. Its compile-time and runtime functions ensure that sensitive information is effectively protected throughout its lifecycle, making it a valuable tool in any security-conscious application.