An Enigma machine simulator built in Rust.
The machine is completely configurable from texts/config.
Rotors are identified with ROTL(eft), ROTC(enter), ROTR(ight): implicitly you're binding each letter with the traditional alphabet.
For instance, in the following file example ROTL, you're binding A->E, B->K ecc...
Then you'll have to write orientation of the rotors from left to right.
If you want to use plugboard simply digit couples of exchanged letter, if not you can leave empty.
Finally, you must type couples of letters reflected by reflector, separated by a whitespace.
An example of accepted file is the following:
START_CONFIG
ROTL: EKMFLGDQVZNTOWYHXUSPAIBRCJ
ROTC: AJDKSIRUXBLHWTMCQGZNPYFVOE
ROTR: BDFHJLCPRTXVZNYEIWGAKMUSQO
ORIENTATION: EAB
PB: AB CD EF
REFL: AY BR CU DH EQ FS GL IP JX KN MO TZ VW
END_CONFIG
Compile the main with: cargo run --release ./path/main.rs.
The machine will read from input and print on output files located in texts folder.
Machine configuration is read from config file in texts folder.
Accepted characters are: [A-Za-z] including (\r)\n.
Due to design choices encrypted/decrypted texts will be in uppercase only.
Some benchmarks (to correctly execute benchmark mode insert proper files in texts folder):
- Divine Comedy (about 590000 characters) -> ca. 257ms
- In Search of Lost Time (1st volume) (about 977000 characters) -> ca. 434ms
These results heavily depends on your machine, this implementation of Enigma is single-threaded and could be optimized.
Some choices were made during creation:
- This Enigma machine replica is based on three rotors variant of Enigma machine.
- Chosen alphabet is the english/german one with uppercase letters only (you can type in lowercase but output file will be in uppercase only).
- This replica has the exact flaws of original Enigma machine, so a letter will never be encrypted to itself (due to reflector).