Public-Key Cryptography

About

This project implements a public-key cryptography algorithm. A command-line interface is also provided for key generation, ECB encryption, and ECB decryption.

NOTE: This program was done primarily for learning purposes; it is almost definitely not cryptographically secure. Use a well-established, secure algorithm instead.

Usage

The program usage is as follows:

KEY GENERATION:

    pubcrypt genkey --priv <PRIV_OUTPATH> --pub <PUB_OUTPATH>

    Options:
        --priv <PRIV_OUTPATH>    Writes private key to the given path
        --pub <PUB_OUTPATH>      Writes public key to the given path

ENCRYPTION AND DECRYPTION:

    pubcrypt crypt (-d|-e) --in <INPATH> --out <OUTPATH> --key <KEYPATH>

    Flags:
        -d               Decrypts INPATH and writes the result to OUTPATH
        -e               Encrypts INPATH and writes the result to OUTPATH

    Options:
        --in <INPATH>     Sets the file to read the algorithm input from
        --out <OUTPATH>   Sets the file to write the algorithm output to
        --key <KEYPATH>   Sets the file to read the key from

Examples

Generate key pair for encryption and decryption:

pubcrypt genkey --priv priv.key --pub pub.key

Encrypt the file foo.txt with the generated public key and write the result to foo.enc:

pubcrypt crypt -e --key pub.key --in foo.txt --out foo.enc

Decrypt the file foo.enc with the generated private key and write the result to decrypted.txt:

pubcrypt crypt -d --key priv.key --in foo.enc --out decrypted.txt