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Do not reset peerstate on encrypted messages

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If message does not contain Autocrypt header, but is encrypted, do not
change the peerstate.
This commit is contained in:
Alexander Krotov
2020-09-05 00:22:33 +03:00
committed by link2xt
parent f657b2950c
commit 42c5bbcda3
1 changed files with 28 additions and 26 deletions
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38
src/e2ee.rs
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@@ -135,41 +135,31 @@ pub async fn try_decrypt(
.map(|from| from.addr) .map(|from| from.addr)
.unwrap_or_default(); .unwrap_or_default();
let mut peerstate = None; // Apply Autocrypt header
let autocryptheader = Aheader::from_headers(context, &from, &mail.headers); let autocryptheader = Aheader::from_headers(context, &from, &mail.headers);
let mut peerstate = Peerstate::from_addr(context, &from).await?;
if message_time > 0 {
peerstate = Peerstate::from_addr(context, &from).await?;
if let Some(ref mut peerstate) = peerstate { if let Some(ref mut peerstate) = peerstate {
if let Some(ref header) = autocryptheader { if let Some(ref header) = autocryptheader {
peerstate.apply_header(&header, message_time); peerstate.apply_header(&header, message_time);
peerstate.save_to_db(&context.sql, false).await?; peerstate.save_to_db(&context.sql, false).await?;
} else if message_time > peerstate.last_seen_autocrypt && !contains_report(mail) {
peerstate.degrade_encryption(message_time);
peerstate.save_to_db(&context.sql, false).await?;
} }
} else if let Some(ref header) = autocryptheader { } else if let Some(ref header) = autocryptheader {
let p = Peerstate::from_header(context, header, message_time); let p = Peerstate::from_header(context, header, message_time);
p.save_to_db(&context.sql, true).await?; p.save_to_db(&context.sql, true).await?;
peerstate = Some(p); peerstate = Some(p);
} }
}
/* possibly perform decryption */ // Possibly perform decryption
let private_keyring: Keyring<SignedSecretKey> = Keyring::new_self(context).await?; let private_keyring: Keyring<SignedSecretKey> = Keyring::new_self(context).await?;
let mut public_keyring_for_validate: Keyring<SignedPublicKey> = Keyring::new(); let mut public_keyring_for_validate: Keyring<SignedPublicKey> = Keyring::new();
let mut signatures = HashSet::default(); let mut signatures = HashSet::default();
if peerstate.as_ref().map(|p| p.last_seen).unwrap_or_else(|| 0) == 0 { if let Some(ref mut peerstate) = peerstate {
peerstate = Peerstate::from_addr(&context, &from).await?;
}
if let Some(peerstate) = peerstate {
peerstate.handle_fingerprint_change(context).await?; peerstate.handle_fingerprint_change(context).await?;
if let Some(key) = peerstate.public_key { if let Some(key) = &peerstate.public_key {
public_keyring_for_validate.add(key); public_keyring_for_validate.add(key.clone());
} else if let Some(key) = peerstate.gossip_key { } else if let Some(key) = &peerstate.gossip_key {
public_keyring_for_validate.add(key); public_keyring_for_validate.add(key.clone());
} }
} }
@@ -181,6 +171,18 @@ pub async fn try_decrypt(
&mut signatures, &mut signatures,
) )
.await?; .await?;
if let Some(mut peerstate) = peerstate {
// If message is not encrypted and it is not a read receipt, degrade encryption.
if out_mail.is_none()
&& message_time > peerstate.last_seen_autocrypt
&& !contains_report(mail)
{
peerstate.degrade_encryption(message_time);
peerstate.save_to_db(&context.sql, false).await?;
}
}
Ok((out_mail, signatures)) Ok((out_mail, signatures))
} }