bigenere

A simple C library for encrypting and decrypting data in a custom Vigenère cipher, suited for raw bytes.

Building

To include the library in your project, simply include the src/bingenere.h header into your C code and add the src/bingenere.c file when compiling together with your code. With GCC and a simple script, it would look something like this: gcc /path/to/your_code.c /path/to/bingenere.c -o /path/to/executable.

To build the examples in src/examples/, run:

make examples

That will generate the executables in the build/ directory.

Usage

Encrypting

uint8_t* bingenere_encrypt(uint8_t* data, uint8_t* key);

Encrypt a data byte array (an array of unsigned chars) with a key (also a byte array) using the binary Vigenère cipher.

Arguments:

• uint8_t* data: an array of unsigned chars, containing the data for encryption.
• uint8_t* key: an array of unsigned chars, containing the key for encryption.

Returns: an array of unsigned chars, containing the encrypted bytes.

Decrypting

uint8_t* bingenere_decrypt(uint8_t* data, uint8_t* key);

Decrypt a data byte array (an array of unsigned chars) with a key (also a byte array) using the binary Vigenère cipher.

Arguments:

• uint8_t* data: an array of unsigned chars, containing the data for decryption.
• uint8_t* key: an array of unsigned chars, containing the key for decryption.

Returns: an array of unsigned chars, containing the decrypted bytes.

Testing

To test the library, simply run:

make tests

That will compile and run all of the implemented tests.

License

This project is licensed under the MIT License - see the LICENSE file for details.