Initial & final commit

.gitignore

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+/target

Cargo.toml

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+[package]
+name = "simple-age-encryptor"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+age = "0.7.0"

src/main.rs

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+use age::{secrecy::SecretString, Encryptor};
+
+fn main() {
+    let passphrase = std::env::args()
+        .nth(1)
+        .expect("Failed to retrieve the passphrase from the CLI arguments");
+    let passphrase = SecretString::new(passphrase);
+
+    let encryptor = Encryptor::with_user_passphrase(passphrase);
+
+    let stdout = std::io::stdout();
+    let mut reader = std::io::stdin();
+
+    let mut writer = encryptor
+        .wrap_output(stdout.lock())
+        .expect("Failed to wrap standard output in encryption");
+
+    std::io::copy(&mut reader, &mut writer).expect("Failed to pipe from stdin to stdout");
+
+    writer.finish().expect("Failed to finish writing");
+}