openpgp: Add asymmetric encryption example.

1 files changed, 29 insertions, 0 deletions

diff --git a/openpgp/examples/encrypt-for.rs b/openpgp/examples/encrypt-for.rs
new file mode 100644
index 00000000..8d704296
--- /dev/null
+++ b/openpgp/examples/encrypt-for.rs
@@ -0,0 +1,29 @@
+use std::env;
+use std::io;
+
+extern crate openpgp;
+use openpgp::armor;
+use openpgp::serialize::stream::{
+    wrap, LiteralWriter, Encryptor, EncryptionMode,
+};
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+    if args.len() != 2 {
+        panic!("A simple encryption filter.\n\n\
+                Usage: {} <keyfile> <input >output\n", args[0]);
+    }
+
+    let keyfile = &args[1];
+    let tpk = openpgp::TPK::from_reader(
+        openpgp::Reader::from_file(keyfile).expect("Failed to open file"))
+        .expect("Failed to read key");
+    let sink = armor::Writer::new(io::stdout(), armor::Kind::Message);
+    let encryptor = Encryptor::new(wrap(sink), &[], &[&tpk],
+                                   EncryptionMode::AtRest)
+        .expect("Failed to create encryptor");
+    let mut literal_writer = LiteralWriter::new(encryptor, 't', None, 0)
+        .expect("Failed to create literal writer");
+    io::copy(&mut io::stdin(), &mut literal_writer)
+        .expect("Failed to encrypt");
+}