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Use Dart's file handling APIs correctly to append to a file

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This commit is contained in:
Vishnu Mohandas 2020-09-26 03:54:33 +05:30
parent 05a67773e9
commit e574a0d8d2
1 changed files with 2 additions and 8 deletions
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10
lib/utils/crypto_util.dart
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@ -61,8 +61,6 @@ class CryptoUtil {
_logger.info("Encrypting file of size " + sourceFileLength.toString());
final inputFile = await (sourceFile.open(mode: io.FileMode.read));
final outputFile =
await (destinationFile.open(mode: io.FileMode.writeOnlyAppend));
final key = Sodium.cryptoSecretstreamXchacha20poly1305Keygen();
final initPushResult =
@ -80,10 +78,9 @@ class CryptoUtil {
bytesRead += chunkSize;
final encryptedData = Sodium.cryptoSecretstreamXchacha20poly1305Push(
initPushResult.state, buffer, null, tag);
outputFile.writeFromSync(encryptedData);
destinationFile.writeAsBytesSync(encryptedData, mode: io.FileMode.append);
}
await inputFile.close();
await outputFile.close();
_logger.info("ChaCha20 Encryption time: " +
(DateTime.now().millisecondsSinceEpoch - encryptionStartTime)
@ -104,8 +101,6 @@ class CryptoUtil {
_logger.info("Decrypting file of size " + sourceFileLength.toString());
final inputFile = await (sourceFile.open(mode: io.FileMode.read));
final outputFile =
await (destinationFile.open(mode: io.FileMode.writeOnlyAppend));
final pullState = Sodium.cryptoSecretstreamXchacha20poly1305InitPull(
attributes.header.bytes, attributes.key.bytes);
@ -120,11 +115,10 @@ class CryptoUtil {
bytesRead += chunkSize;
final pullResult = Sodium.cryptoSecretstreamXchacha20poly1305Pull(
pullState, buffer, null);
outputFile.writeFromSync(pullResult.m);
destinationFile.writeAsBytesSync(pullResult.m, mode: io.FileMode.append);
tag = pullResult.tag;
}
await inputFile.close();
await outputFile.close();
_logger.info("ChaCha20 Decryption time: " +
(DateTime.now().millisecondsSinceEpoch - decryptionStartTime)