test: test rotation of encryption subkey

src/pgp.rs

@@ -405,7 +405,7 @@ mod tests {
  use tokio::sync::OnceCell;
 
  use super::*;
- use crate::test_utils::{alice_keypair, bob_keypair};
+ use crate::test_utils::{alice_keypair, bob_keypair, TestContextManager};
 
  #[test]
  fn test_split_armored_data_1() {
@@ -592,4 +592,38 @@ mod tests {
  assert_eq!(plain, CLEARTEXT);
  assert_eq!(valid_signatures.len(), 0);
  }
+
+ #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+ async fn test_rotate_encryption_key() -> Result<()> {
+ let mut tcm = TestContextManager::new();
+ let alice = &tcm.alice().await;
+ let bob = &tcm.bob().await;
+
+ tcm.send_recv(alice, bob, "Hi!").await;
+
+ // TODO: alice changes encryption key
+ let mut alice_keyring = crate::key::load_self_secret_keyring(alice).await?;
+ let mut alice_key = alice_keyring.pop().unwrap();
+
+ // There should be no public subkeys.
+ assert!(alice_key.public_subkeys.is_empty());
+
+ // There is exactly one secret subkey
+ // that we are going to replace.
+ assert_eq!(alice_key.secret_subkeys.len(), 1);
+ alice_key.secret_subkeys.clear();
+
+ let new_subkey = SubkeyParamsBuilder::default()
+ .key_type(PgpKeyType::ECDH(ECCCurve::Curve25519))
+ .can_encrypt(true)
+ .passphrase(None)
+ .build()
+ .context("Failed to build subkey parameters")?;
+
+ let new_keypair = KeyPair::new(alice_key)?;
+
+ tcm.send_recv(alice, bob, "Hi again, with a new key!").await;
+
+ Ok(())
+ }
 }