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57 lines
1.9 KiB
C++
57 lines
1.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "DecryptingInputStream.h"
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#include "DecryptingInputStream_impl.h"
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namespace mozilla::dom::quota {
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NS_IMPL_ADDREF(DecryptingInputStreamBase);
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NS_IMPL_RELEASE(DecryptingInputStreamBase);
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NS_INTERFACE_MAP_BEGIN(DecryptingInputStreamBase)
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NS_INTERFACE_MAP_ENTRY(nsIInputStream)
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NS_INTERFACE_MAP_ENTRY(nsISeekableStream)
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NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIInputStream)
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NS_INTERFACE_MAP_END
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DecryptingInputStreamBase::DecryptingInputStreamBase(
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MovingNotNull<nsCOMPtr<nsIInputStream>> aBaseStream, size_t aBlockSize)
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: mBaseStream(std::move(aBaseStream)), mBlockSize(aBlockSize) {
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const nsCOMPtr<nsISeekableStream> seekableStream =
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do_QueryInterface(mBaseStream->get());
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MOZ_ASSERT(seekableStream &&
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SameCOMIdentity(mBaseStream->get(), seekableStream));
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mBaseSeekableStream.init(WrapNotNullUnchecked(seekableStream));
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}
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NS_IMETHODIMP DecryptingInputStreamBase::Read(char* aBuf, uint32_t aCount,
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uint32_t* aBytesReadOut) {
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return ReadSegments(NS_CopySegmentToBuffer, aBuf, aCount, aBytesReadOut);
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}
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NS_IMETHODIMP DecryptingInputStreamBase::IsNonBlocking(bool* aNonBlockingOut) {
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*aNonBlockingOut = false;
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return NS_OK;
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}
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NS_IMETHODIMP DecryptingInputStreamBase::SetEOF() {
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// Cannot truncate a read-only stream.
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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size_t DecryptingInputStreamBase::PlainLength() const {
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MOZ_ASSERT(mNextByte <= mPlainBytes);
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return mPlainBytes - mNextByte;
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}
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size_t DecryptingInputStreamBase::EncryptedBufferLength() const {
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return mBlockSize;
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}
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} // namespace mozilla::dom::quota
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