25 lines
907 B
Dart
25 lines
907 B
Dart
|
// Display helpers for the keys and ids the native library hands back as
|
||
|
|
// base32 and hex — formatting only, no protocol meaning.
|
||
|
|
|
||
|
|
import "dart:typed_data";
|
||
|
|
|
||
|
|
/// Lowercase hex, as the message ids cross the ABI.
|
||
|
|
String hex(List<int> bytes) =>
|
||
|
|
bytes.map((b) => b.toRadixString(16).padLeft(2, "0")).join();
|
||
|
|
|
||
|
|
/// The compact human check for a key: the first 20 base32 characters in
|
||
|
|
/// groups of four, the same shape every smol client shows.
|
||
|
|
String fingerprint(String keyB32) {
|
||
|
|
final s = keyB32.substring(0, 20);
|
||
|
|
return RegExp(".{4}").allMatches(s).map((m) => m[0]).join(" ");
|
||
|
|
}
|
||
|
|
|
||
|
|
/// The inverse of [hex]; throws on anything that is not even-length hex.
|
||
|
|
Uint8List unhex(String text) {
|
||
|
|
if (text.length % 2 != 0) {
|
||
|
|
throw FormatException("odd-length hex string");
|
||
|
|
}
|
||
|
|
return Uint8List.fromList(
|
||
|
|
[for (var i = 0; i < text.length; i += 2) int.parse(text.substring(i, i + 2), radix: 16)]);
|
||
|
|
}
|