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Add UI for setting repeater identity keys

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This adds a simple UI in repeater management settings for remotely
setting a repeater's private key. A key can be pasted from an external
key generator, or a random one can be generated here, optionally with a
specified prefix.

If a prefix is specified, searching is done in 30ms batches in order
to keep the UI responsive and show the progress indicator animation
smoothly. Searches can be interrupted. An estimation of search length is
given as expected number of generated key pairs. (A future improvement
would be to observe keys per second performance and give time estimates
based on that.)

When it generates a new private key on your behalf, it can tell you
what the corresponding public key will be. Unfortunately, if you paste
one in from another source, it can't compute the corresponding public
key. This is because the standard Dart crypto library doesn't provide
that capability, nor does it give access to the elliptic curve functions
it implements so we could do it ourselves. Our only recourse would be to
copy the source for all those things, and I didn't think it was worth
it.

This will not check the validity of a pasted key, but the remote
repeater will. It does limit it to the correct length and hexadecimal
charset.

Prefixes are limited to 4 characters. There's no technical reason for
this, but users are unlikely to want more, and I think it would just be
a bad experience to allow more and spin for a very long time. If someone
really wants a longer one, they can use an external generator like they
do now.

Possible TODO: rewrite background processing using isolates.

Closes #142.
This commit is contained in:
Seth Golub
2026-05-28 10:57:50 -07:00
parent 5670ab0067
commit e1a4900dc0
29 changed files with 1169 additions and 44 deletions
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lib/l10n/app_localizations_pt.dart
+35
View File
@@ -2635,6 +2635,41 @@ class AppLocalizationsPt extends AppLocalizations {
String get repeater_pathHashModeHelper =>
'Bytes utilizados para codificar o ID deste repetidor nas tags de caminho/detecção de loop. 0=1 byte (256 IDs, até 64 saltos), 1=2 bytes (65.000 IDs, até 32 saltos), 2=3 bytes (16 milhões de IDs, até 21 saltos). As versões 1.13 e anteriores do firmware não suportam caminhos multi-byte — apenas funcionam uma vez após a ativação da rede (a partir da versão 1.14+).';
@override
String get repeater_keySettings => 'Change Identity Keys';
@override
String get repeater_keySettingsSubtitle =>
'Change the public/private keypair';
@override
String get repeater_prvKey => 'Private key';
@override
String get repeater_prvKeyHelper =>
'A new private key for the repeater, a 128-character hex string.';
@override
String get repeater_generatePrvKey => 'Generate a random keypair';
@override
String get repeater_stopGeneratingPrvKey => 'Interrupt search for keypair';
@override
String get repeater_pubKey => 'Public key';
@override
String get repeater_pubKeyHelper =>
'This is the public key that goes with the generated private key. You can\'t set this directly.';
@override
String get repeater_pubKeyPrefix => 'Desired prefix';
@override
String repeater_pubKeyPrefixHelper(int tries) {
return 'Find a public key that starts with these hex digits. Expected tries needed: $tries.';
}
@override
String get repeater_txDelay => 'Atraso na entrega em Flood, TX';