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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /modules/woff2/RLBoxWOFF2Sandbox.cpp | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'modules/woff2/RLBoxWOFF2Sandbox.cpp')
-rw-r--r-- | modules/woff2/RLBoxWOFF2Sandbox.cpp | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/modules/woff2/RLBoxWOFF2Sandbox.cpp b/modules/woff2/RLBoxWOFF2Sandbox.cpp new file mode 100644 index 0000000000..3ce947af07 --- /dev/null +++ b/modules/woff2/RLBoxWOFF2Sandbox.cpp @@ -0,0 +1,64 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include <woff2/decode.h> +#include <cassert> +#include "RLBoxWOFF2Sandbox.h" + +bool RLBoxConvertWOFF2ToTTF(const char* aData, unsigned long aLength, + unsigned long aDecompressedSize, + unsigned long* aResultSize, void** aResultOwningStr, + char** aResultData) { + std::unique_ptr<std::string> buf = + std::make_unique<std::string>(aDecompressedSize, 0); + woff2::WOFF2StringOut out(buf.get()); + if (!woff2::ConvertWOFF2ToTTF(reinterpret_cast<const uint8_t*>(aData), + aLength, &out)) { + return false; + } + *aResultSize = out.Size(); + // Return the string and its underlying C string. We need both to make sure we + // can free the string (which we do with RLBoxDeleteWOFF2String). + *aResultData = buf->data(); + *aResultOwningStr = static_cast<void*>(buf.release()); + return true; +} + +void RLBoxDeleteWOFF2String(void** aStr) { + std::string* buf = static_cast<std::string*>(*aStr); + delete buf; +} + +BrotliDecompressCallback* sRLBoxBrotliDecompressCallback = nullptr; + +void RegisterWOFF2Callback(BrotliDecompressCallback* aCallback) { +#ifdef MOZ_IN_WASM_SANDBOX + // When Woff2 is wasmboxed, we need to register a callback for brotli + // decompression. The easiest way to store this is in a static variable. This + // is thread-safe because each (potentially-concurrent) woff2 instance gets + // its own sandbox with its own copy of the statics. + // + // When the sandbox is disabled (replaced with the noop sandbox), setting the + // callback is actually racey. However, we don't actually need a callback in + // that case, and can just invoke brotli directly. + sRLBoxBrotliDecompressCallback = aCallback; +#endif +} + +BrotliDecoderResult RLBoxBrotliDecoderDecompress(size_t aEncodedSize, + const uint8_t* aEncodedBuffer, + size_t* aDecodedSize, + uint8_t* aDecodedBuffer) { +#ifdef MOZ_IN_WASM_SANDBOX + assert(sRLBoxBrotliDecompressCallback); + return sRLBoxBrotliDecompressCallback( + aEncodedSize, reinterpret_cast<const char*>(aEncodedBuffer), aDecodedSize, + reinterpret_cast<char*>(aDecodedBuffer)); +#else + return BrotliDecoderDecompress(aEncodedSize, aEncodedBuffer, aDecodedSize, + aDecodedBuffer); +#endif +} |