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// decrypt_example.rs
//
// Copyright 2019 Jordan Petridis <jordan@centricular.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//
// SPDX-License-Identifier: MIT
use gst::glib;
use gst::prelude::*;
use sodiumoxide::crypto::box_;
use std::error::Error;
use std::fs::File;
use std::path::{Path, PathBuf};
use clap::Parser;
use serde::{Deserialize, Serialize};
#[derive(Parser, Debug)]
#[clap(version, author, about = "Decrypt a gstsodium10 file")]
struct Args {
/// File to encrypt
#[clap(short, long)]
input: String,
/// File to decrypt
#[clap(short, long)]
output: String,
}
#[derive(Debug, Serialize, Deserialize)]
struct Keys {
public: box_::PublicKey,
private: box_::SecretKey,
}
impl Keys {
fn from_file(file: &Path) -> Result<Self, Box<dyn Error>> {
let f = File::open(file)?;
serde_json::from_reader(f).map_err(From::from)
}
}
fn main() -> Result<(), Box<dyn Error>> {
let args = Args::parse();
gst::init()?;
gstsodium::plugin_register_static().expect("Failed to register sodium plugin");
let receiver_keys = {
let mut r = PathBuf::new();
r.push(env!("CARGO_MANIFEST_DIR"));
r.push("examples");
r.push("receiver_sample");
r.set_extension("json");
r
};
let sender_keys = {
let mut s = PathBuf::new();
s.push(env!("CARGO_MANIFEST_DIR"));
s.push("examples");
s.push("sender_sample");
s.set_extension("json");
s
};
let receiver = &Keys::from_file(&receiver_keys)?;
let sender = &Keys::from_file(&sender_keys)?;
let filesrc = gst::ElementFactory::make("filesrc")
.property("location", &args.input)
.build()
.unwrap();
let decrypter = gst::ElementFactory::make("sodiumdecrypter")
.property("receiver-key", glib::Bytes::from_owned(receiver.private.0))
.property("sender-key", glib::Bytes::from_owned(sender.public))
.build()
.unwrap();
let typefind = gst::ElementFactory::make("typefind").build().unwrap();
let filesink = gst::ElementFactory::make("filesink")
.property("location", &args.output)
.build()
.unwrap();
let pipeline = gst::Pipeline::builder().name("test-pipeline").build();
pipeline
.add_many([&filesrc, &decrypter, &typefind, &filesink])
.expect("failed to add elements to the pipeline");
gst::Element::link_many([&filesrc, &decrypter, &typefind, &filesink])
.expect("failed to link the elements");
pipeline
.set_state(gst::State::Playing)
.expect("Unable to set the pipeline to the `Playing` state");
let bus = pipeline.bus().unwrap();
for msg in bus.iter_timed(gst::ClockTime::NONE) {
use gst::MessageView;
match msg.view() {
MessageView::Error(err) => {
eprintln!(
"Error received from element {:?}: {}",
err.src().map(|s| s.path_string()),
err.error()
);
eprintln!("Debugging information: {:?}", err.debug());
break;
}
MessageView::Eos(..) => break,
_ => (),
}
}
pipeline
.set_state(gst::State::Null)
.expect("Unable to set the pipeline to the `Playing` state");
Ok(())
}
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