SLH-DSA Timestamp CLI v1

```toml

[package]

name = "final_cli_v1.0_std"

version = "1.0.0"

edition = "2021"

[dependencies]

post_quantum_crypto = { path = "../post_quantum_crypto" }

sha3 = "0.10"

chrono = "0.4"

serde_json = "1.0"

serde = { version = "1.0", features = ["derive"] }

clap = "4.0"

```

```rust

use post_quantum_crypto::apps::timestamp::SlhDsaTimestamp;

use sha3::{Sha3_256, Digest};

use chrono::Utc;

use serde::{Serialize, Deserialize};

use std::fs;

use clap::{Arg, Command};

#[derive(Serialize, Deserialize)]

struct Proof {

    signature: String,

    public_key: String,

    file_hash: String,

    timestamp: String,

    filename: String,

}

fn main() {

    let matches = Command::new("FINAL_Cli_v1.0_std")

        .subcommand(Command::new("timestamp").arg(Arg::new("file").required(true)))

        .subcommand(Command::new("verify").arg(Arg::new("file").required(true)).arg(Arg::new("proof").required(true)))

        .get_matches();

    let timestamp_app = SlhDsaTimestamp::new();

    match matches.subcommand() {

        Some(("timestamp", args)) => timestamp_file(&timestamp_app, args.value_of("file").unwrap()),

        Some(("verify", args)) => verify_timestamp(&timestamp_app, args.value_of("file").unwrap(), args.value_of("proof").unwrap()),

        _ => println!("Usage: timestamp <file> or verify <file> <proof.json>"),

    }

}

fn hash(data: &[u8]) -> String {

    let mut hasher = Sha3_256::new();

    hasher.update(data);

    format!("{:x}", hasher.finalize())

}

fn timestamp_file(app: &SlhDsaTimestamp, file: &str) {

    let data = fs::read(file).unwrap();

    let (sig, pk, h, ts) = app.timestamp_file(&data).unwrap();

    let proof = Proof {

        signature: hex::encode(&sig),

        public_key: hex::encode(&pk),

        file_hash: h,

        timestamp: ts,

        filename: file.to_string(),

    };

    let json = serde_json::to_string_pretty(&proof).unwrap();

    fs::write(format!("{}.timestamp.json", file), json).unwrap();

    println!("Timestamped: {}.timestamp.json", file);

}

fn verify_timestamp(app: &SlhDsaTimestamp, file: &str, proof_file: &str) {

    let data = fs::read(file).unwrap();

    let json = fs::read_to_string(proof_file).unwrap();

    let proof: Proof = serde_json::from_str(&json).unwrap();

    let sig = hex::decode(&proof.signature).unwrap();

    let pk = hex::decode(&proof.public_key).unwrap();

    if app.verify_timestamp(&data, &sig, &pk, &proof.file_hash, &proof.timestamp).unwrap() {

        println!("Verified");

    } else {

        println!("Failed");

    }

}

```

---

**FINAL_Cli_v1.0_std**  

- `./final_cli_v1.0_std timestamp document.pdf` → `document.pdf.timestamp.json`  

- `./final_cli_v1.0_std verify document.pdf document.pdf.timestamp.json` → Verified  

---

**Build & Run:**

```bash

cargo build --release

./target/release/final_cli_v1.0_std timestamp file.pdf

```

---

**Next?**  

Say: **Make GUI**  

→ I give you **FINAL_Gui_v1.0_core**

**Go.**