SSH: return with an error if the host key is wrong, rather than denying authentication

Dependencies

• [2] TPEH2XNB 1.0.0-alpha.28, with Tokio 1.0
• [3] SZWBLWZ4 Reading ~/.ssh/config
• [4] SXEYMYF7 Fixing the bad changes in history (unfortunately, by rebooting).
• [5] UDHP4ZVB Fixing SSH asynchronicity issues
• [6] CCLLB7OI Upgrading to Sanakirja 0.15 + version bump

Change contents

• replacement in pijul/src/remote/ssh.rs at line 94
  [3.28092]→[3.813:942](∅→∅),[3.942]→[3.28167:28274](∅→∅),[3.28167]→[3.28167:28274](∅→∅)
  − let authenticated = self

  − .auth_agent(&mut h, &mut key_path)

  − .await

  − .unwrap_or(false)

  − || self.auth_pk(&mut h, &mut key_path).await

  − || self.auth_password(&mut h).await?;
  [3.28092]

  [3.28274]
  + let authenticated = match self.auth_agent(&mut h, &mut key_path).await {

  + Ok(true) => true,

  + Ok(false) => {

  + self.auth_pk(&mut h, &mut key_path).await || self.auth_password(&mut h).await?

  + }

  + Err(e) => return Err(e.into()),

  + };
• replacement in pijul/src/remote/ssh.rs at line 129
  [3.1056]→[3.1056:1095](∅→∅)
  − ) -> Result<bool, anyhow::Error> {
  [3.1056]

  [3.28905]
  + ) -> Result<bool, thrussh::Error> {
• edit in pijul/src/remote/ssh.rs at line 157
  [3.29953]

  [2.141]
  + (_, Err(thrussh::AgentAuthError::Send(e))) => {

  + debug!("send error {:?}", e);

  + return Err(thrussh::Error::SendError);

  + }
• replacement in pijul/src/remote/ssh.rs at line 317
  [3.33620]→[3.33620:33679](∅→∅)
  − error!("Key changed for {:?}", self.addr);
  [3.33620]

  [2.713]
  + writeln!(std::io::stderr(), "Key changed for {:?}", self.addr).unwrap_or(());

  +