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minor bytebuffer allocation optimization

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This commit is contained in:
Sebastian Stenzel
2016-02-22 14:58:27 +01:00
parent 819c56fe4c
commit e6a9786b7a
1 changed files with 4 additions and 2 deletions
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6
main/filesystem-crypto/src/main/java/org/cryptomator/crypto/engine/impl/FileContentEncryptorImpl.java
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@@ -87,11 +87,13 @@ class FileContentEncryptorImpl implements FileContentEncryptor {
private void appendSizeObfuscationPadding(long actualSize) throws InterruptedException {
final int maxPaddingLength = (int) Math.min(Math.max(actualSize / 10, PADDING_LOWER_BOUND), PADDING_UPPER_BOUND); // preferably 10%, but at least lower bound and no more than upper bound
final int randomPaddingLength = randomSource.nextInt(maxPaddingLength);
final ByteBuffer buf = ByteBuffer.allocate(PAYLOAD_SIZE);
int remainingPadding = randomPaddingLength;
while (remainingPadding > 0) {
ByteBuffer buf = ByteBuffer.allocate(Math.min(remainingPadding, PAYLOAD_SIZE));
int bytesInCurrentIteration = Math.min(remainingPadding, PAYLOAD_SIZE);
buf.clear().limit(bytesInCurrentIteration);
appendAllAndSubmitIfFull(buf);
remainingPadding -= buf.capacity();
remainingPadding -= bytesInCurrentIteration;
}
}