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use structopt;
use gpgme::{Context, Protocol};
use std::{
error::Error,
fs::File,
io::{self, prelude::*},
path::PathBuf,
};
use structopt::StructOpt;
#[derive(Debug, StructOpt)]
struct Cli {
#[structopt(long)]
/// Use the CMS protocol
cms: bool,
#[structopt(short, long = "recipient")]
/// For whom to encrypt the messages
recipients: Vec<String>,
#[structopt(parse(from_os_str))]
/// Files to encrypt
filename: PathBuf,
}
fn main() -> Result<(), Box<dyn Error>> {
let args = Cli::from_args();
let proto = if args.cms {
Protocol::Cms
} else {
Protocol::OpenPgp
};
let mut ctx = Context::from_protocol(proto)?;
ctx.set_armor(true);
let keys = if !args.recipients.is_empty() {
ctx.find_keys(args.recipients)?
.filter_map(|x| x.ok())
.filter(|k| k.can_encrypt())
.collect()
} else {
Vec::new()
};
let filename = &args.filename;
let mut input = File::open(&args.filename)
.map_err(|e| format!("can't open file `{}': {:?}", filename.display(), e))?;
let mut output = Vec::new();
ctx.encrypt(&keys, &mut input, &mut output)
.map_err(|e| format!("encrypting failed: {:?}", e))?;
println!("Begin Output:");
io::stdout().write_all(&output)?;
println!("End Output.");
Ok(())
}
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