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Ensure seedRandom doesn't throw if /dev/urandom doesn't exist.

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This commit is contained in:
Matt Perry 2015-11-04 14:50:04 -05:00
parent d74a7517ef
commit e337b1d2bc
2 changed files with 11 additions and 5 deletions
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14
packages/flx/lib/signing.dart
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@ -30,10 +30,16 @@ class CipherParameters {
// Disclaimer: I don't really understand why we need 2 parameters for
// cipher's API.
Future seedRandom() async {
RandomAccessFile file = await new File("/dev/urandom").open();
Uint8List key = new Uint8List.fromList(await file.read(16));
Uint8List iv = new Uint8List.fromList(await file.read(16));
_initRandom(key, iv);
try {
RandomAccessFile file = await new File("/dev/urandom").open();
Uint8List key = new Uint8List.fromList(await file.read(16));
Uint8List iv = new Uint8List.fromList(await file.read(16));
_initRandom(key, iv);
} on FileSystemException {
// TODO(mpcomplete): need an entropy source on Windows. We might get this
// for free from Dart itself soon.
print("Warning: Failed to seed random number generator. No /dev/urandom.");
}
}
SecureRandom _random;

2
packages/flx/pubspec.yaml
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@ -1,5 +1,5 @@
name: flx
version: 0.0.7
version: 0.0.8
author: Flutter Authors <flutter-dev@googlegroups.com>
description: Library for dealing with Flutter bundle (.flx) files
homepage: http://flutter.io