47 lines
1.6 KiB
Rust
47 lines
1.6 KiB
Rust
use std::io::BufReader;
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use std::fs::File;
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use std::io::prelude::*;
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use rand::rngs::OsRng;
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use ed25519_dalek::SigningKey;
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use ed25519_dalek::Signature;
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use ed25519_dalek::Signer;
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fn main() -> std::io::Result<()>{
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let action = std::env::args().nth(1).expect("no command given");
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if action == "sign" {
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let keyfilepath = std::env::args().nth(2).expect("no keyfilepath given");
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let messagefilepath = std::env::args().nth(3).expect("no message given");
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let mut keyfile = File::open(&keyfilepath).expect("no file found");
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let mut keybuffer: [u8; 32] = [0; 32];
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keyfile.read(&mut keybuffer).expect("buffer overflow");
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let signing_key: SigningKey = SigningKey::from_bytes(&keybuffer);
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let messagefile= File::open(&messagefilepath).expect("no file found");
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let mut messagereader = BufReader::new(messagefile);
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let mut messagebuf = Vec::new();
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messagereader.read_to_end(&mut messagebuf)?;
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println!("Using key {keyfilepath}");
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let signature: Signature = signing_key.sign(&messagebuf);
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println!("Signture: {signature}");
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return Ok(())
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} else if action == "create" {
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let keyfilepath = std::env::args().nth(2).expect("no keyfilepath given");
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let mut csprng = OsRng;
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let signing_key: SigningKey = SigningKey::generate(&mut csprng);
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println!("Writing new key to {keyfilepath}");
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let mut file = File::create(keyfilepath)?;
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file.write_all(&signing_key.to_bytes())?;
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return Ok(());
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} else {
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println!("Unrecognized command {action}");
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return Ok(());
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}
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}
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