OTPEncrypt

Encrypt and/or decrypt any type of file using one-time pads.

Purpose

Uses a user-provided one-time pad to encrypt or decrypt an input file's contents, byte by byte. It can be used with any type of file.

Pads for this program can be generated using a tool such as https://github.com/moonbench/otpgen

Installation

• Clone the repository
• Run cargo build --release

Usage

USAGE:
    otpencrypt <SUBCOMMAND>

FLAGS:
    -h, --help       Prints help information
    -V, --version    Prints version information

SUBCOMMANDS:
    decrypt    Decrypts a file
    encrypt    Encrypts a file
    help       Prints this message or the help of the given subcommand(s)

Encryption

USAGE:
    otpencrypt encrypt --input <input> --pad <pad>

OPTIONS:
    -i, --input <input>    The file to be encrypted
    -p, --pad <pad>        The one-time pad

Decryption

USAGE:
    otpencrypt decrypt --input <input> --pad <pad>

OPTIONS:
    -i, --input <input>    The file to be decrypted
    -p, --pad <pad>        The one-time pad

Examples

Encrypting a file

To encrypt the file document.txt using the pad onetimepad:

./target/release/otpencrypt encrypt --input document.txt --pad onetimepad

This will produce an encrypted file document.txt.encrypted.

Decrypting a file

To decrypt the file document.txt.encrypted using the pad onetimepad:

./target/release/otpencrypt decrypt --input document.txt.encrypted --pad onetimepad

This will produce the original document.txt file if the same pad is used for both operations.