This is a simple implementation of the RSA algorithm. It allows users to generate key pairs, encrypt plaintext, and decrypt ciphertext.
The program can be run with the following command-line arguments:
generate- Generates a new key pair and writes the public and private keys to files.encrypt <public-key-file> <input-file> <output-file>- Encrypts the input file using the specified public key file and writes the ciphertext to the output file.decrypt <private-key-file> <input-file> <output-file>- Decrypts the input file using the specified private key file and writes the plaintext to the output file.
This program requires the .NET framework and a C# compiler to run.
To generate a new key pair, run the program with the generate argument:
LES.exe generate
This will generate a new pair of public and private keys and write them to public.key and private.key files, respectively. The generated keys will be displayed on the console as well.
To encrypt a file using a public key, run the program with the encrypt argument followed by the public key file, input file, and output file paths:
LES.exe encrypt <public-key-file> <input-file> <output-file>
For example:
LES encrypt public.key plaintext.txt ciphertext.txt
This will read the public key from public.key, encrypt the contents of plaintext.txt, and write the ciphertext to ciphertext.txt.
To decrypt a file using a private key, run the program with the decrypt argument followed by the private key file, input file, and output file paths:
LES.exe decrypt <private-key-file> <input-file> <output-file>
For example:
LES.exe decrypt private.key ciphertext.txt plaintext.txt
This will read the private key from private.key, decrypt the ciphertext from ciphertext.txt, and write the plaintext to plaintext.txt.
Please note that this implementation is intended for educational purposes and may not provide the same level of security as production-grade encryption systems. Use it at your own risk.
This code is provided under the MIT License.