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fix: Use stanza receival timestamps to guard against stale kex messages
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PapaTutuWawa
2022-10-02 19:23:58 +02:00
parent 0826d043d5
commit 1472624b1d
8 changed files with 77 additions and 47 deletions
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11
lib/src/errors.dart
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@@ -31,14 +31,11 @@ class UnknownSignedPrekeyException implements Exception {
String errMsg() => 'Unknown Signed Prekey used.';
}
/// Triggered by the Session Manager when the received Key Exchange message does not
/// meet our expectations. This happens when the PN attribute of the message is not equal
/// to our receive number.
/// Triggered by the Session Manager when the received Key Exchange message does not meet
/// the requirement that a key exchange, given that the ratchet already exists, must be
/// sent after its creation.
class InvalidKeyExchangeException implements Exception {
const InvalidKeyExchangeException(this.expectedPn, this.actualPn);
final int expectedPn;
final int actualPn;
String errMsg() => 'The pn attribute of the key exchange is invalid. Expected $expectedPn, got $actualPn';
String errMsg() => 'The key exchange was sent before the last kex finished';
}
/// Triggered by the Session Manager when a message's sequence number is smaller than we