21 lines
601 B
Dart
21 lines
601 B
Dart
import 'dart:math';
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final Random _rng = Random.secure();
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String randomHex(int bytes) {
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final sb = StringBuffer();
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for (var i = 0; i < bytes; i++) {
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sb.write(_rng.nextInt(256).toRadixString(16).padLeft(2, '0'));
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}
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return sb.toString();
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}
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String uuidV4() {
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final b = List<int>.generate(16, (_) => _rng.nextInt(256));
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b[6] = (b[6] & 0x0f) | 0x40;
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b[8] = (b[8] & 0x3f) | 0x80;
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String h(int i) => b[i].toRadixString(16).padLeft(2, '0');
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return '${h(0)}${h(1)}${h(2)}${h(3)}-${h(4)}${h(5)}-${h(6)}${h(7)}-'
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'${h(8)}${h(9)}-${h(10)}${h(11)}${h(12)}${h(13)}${h(14)}${h(15)}';
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}
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