gst-plugins-rs/generic/sodium/examples/decrypt_example.rs

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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 glib::prelude::*;
use gst::prelude::*;
use sodiumoxide::crypto::box_;
use std::error::Error;
use std::fs::File;
use std::path::PathBuf;
use clap::{App, Arg};
use serde::{Deserialize, Serialize};
#[derive(Debug, Serialize, Deserialize)]
struct Keys {
public: box_::PublicKey,
private: box_::SecretKey,
}
impl Keys {
fn from_file(file: &PathBuf) -> 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 matches = App::new("Decrypt a gstsodium10 file.")
.version("1.0")
.author("Jordan Petridis <jordan@centricular.com>")
.arg(
Arg::with_name("input")
.short("i")
.long("input")
.value_name("FILE")
.help("File to encrypt")
.required(true)
.takes_value(true),
)
.arg(
Arg::with_name("output")
.short("o")
.long("output")
.value_name("FILE")
.help("File to decrypt")
.required(true)
.takes_value(true),
)
.get_matches();
gst::init()?;
gstsodium::plugin_register_static().expect("Failed to register sodium plugin");
let input_loc = matches.value_of("input").unwrap();
let out_loc = matches.value_of("output").unwrap();
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", None).unwrap();
let decrypter = gst::ElementFactory::make("sodiumdecrypter", None).unwrap();
let typefind = gst::ElementFactory::make("typefind", None).unwrap();
let filesink = gst::ElementFactory::make("filesink", None).unwrap();
filesrc
.set_property("location", &input_loc)
.expect("Failed to set location property");
filesink
.set_property("location", &out_loc)
.expect("Failed to set location property");
decrypter.set_property("receiver-key", &glib::Bytes::from_owned(receiver.private.0))?;
decrypter.set_property("sender-key", &glib::Bytes::from_owned(sender.public))?;
let pipeline = gst::Pipeline::new(Some("test-pipeline"));
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.get_bus().unwrap();
for msg in bus.iter_timed(gst::CLOCK_TIME_NONE) {
use gst::MessageView;
match msg.view() {
MessageView::Error(err) => {
eprintln!(
"Error received from element {:?}: {}",
err.get_src().map(|s| s.get_path_string()),
err.get_error()
);
eprintln!("Debugging information: {:?}", err.get_debug());
break;
}
MessageView::Eos(..) => break,
_ => (),
}
}
pipeline
.set_state(gst::State::Null)
.expect("Unable to set the pipeline to the `Playing` state");
Ok(())
}