Nuke the sandbox

1 files changed, 0 insertions, 247 deletions

diff --git a/security/sandbox/linux/SandboxBrokerClient.cpp b/security/sandbox/linux/SandboxBrokerClient.cpp
deleted file mode 100644
index 68744ad02..000000000
--- a/security/sandbox/linux/SandboxBrokerClient.cpp
+++ /dev/null
@@ -1,247 +0,0 @@
-/* -*- 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 "SandboxBrokerClient.h"
-#include "SandboxInfo.h"
-#include "SandboxLogging.h"
-
-#include <errno.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <string.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include "mozilla/Assertions.h"
-#include "mozilla/NullPtr.h"
-#include "base/strings/safe_sprintf.h"
-
-namespace mozilla {
-
-SandboxBrokerClient::SandboxBrokerClient(int aFd)
-: mFileDesc(aFd)
-{
-}
-
-SandboxBrokerClient::~SandboxBrokerClient()
-{
-  close(mFileDesc);
-}
-
-int
-SandboxBrokerClient::DoCall(const Request* aReq, const char* aPath,
-                            const char* aPath2, void* aResponseBuff,
-                            bool expectFd)
-{
-  // Remap /proc/self to the actual pid, so that the broker can open
-  // it.  This happens here instead of in the broker to follow the
-  // principle of least privilege and keep the broker as simple as
-  // possible.  (Note: when pid namespaces happen, this will also need
-  // to remap the inner pid to the outer pid.)
-  // We only remap the first path.
-  static const char kProcSelf[] = "/proc/self/";
-  static const size_t kProcSelfLen = sizeof(kProcSelf) - 1;
-  const char* path = aPath;
-  // This buffer just needs to be large enough for any such path that
-  // the policy would actually allow.  sizeof("/proc/2147483647/") == 18.
-  char rewrittenPath[64];
-  if (strncmp(aPath, kProcSelf, kProcSelfLen) == 0) {
-    ssize_t len =
-      base::strings::SafeSPrintf(rewrittenPath, "/proc/%d/%s",
-                                 getpid(), aPath + kProcSelfLen);
-    if (static_cast<size_t>(len) < sizeof(rewrittenPath)) {
-      if (SandboxInfo::Get().Test(SandboxInfo::kVerbose)) {
-        SANDBOX_LOG_ERROR("rewriting %s -> %s", aPath, rewrittenPath);
-      }
-      path = rewrittenPath;
-    } else {
-      SANDBOX_LOG_ERROR("not rewriting unexpectedly long path %s", aPath);
-    }
-  }
-
-  struct iovec ios[3];
-  int respFds[2];
-
-  // Set up iovecs for request + path.
-  ios[0].iov_base = const_cast<Request*>(aReq);
-  ios[0].iov_len = sizeof(*aReq);
-  ios[1].iov_base = const_cast<char*>(path);
-  ios[1].iov_len = strlen(path) + 1;
-  if (aPath2 != nullptr) {
-    ios[2].iov_base = const_cast<char*>(aPath2);
-    ios[2].iov_len = strlen(aPath2) + 1;
-  } else {
-    ios[2].iov_base = 0;
-    ios[2].iov_len = 0;
-  }
-  if (ios[1].iov_len > kMaxPathLen) {
-    return -ENAMETOOLONG;
-  }
-  if (ios[2].iov_len > kMaxPathLen) {
-    return -ENAMETOOLONG;
-  }
-
-  // Create response socket and send request.
-  if (socketpair(AF_UNIX, SOCK_SEQPACKET, 0, respFds) < 0) {
-    return -errno;
-  }
-  const ssize_t sent = SendWithFd(mFileDesc, ios, 3, respFds[1]);
-  const int sendErrno = errno;
-  MOZ_ASSERT(sent < 0 ||
-             static_cast<size_t>(sent) == ios[0].iov_len
-                                        + ios[1].iov_len
-                                        + ios[2].iov_len);
-  close(respFds[1]);
-  if (sent < 0) {
-    close(respFds[0]);
-    return -sendErrno;
-  }
-
-  // Set up iovecs for response.
-  Response resp;
-  ios[0].iov_base = &resp;
-  ios[0].iov_len = sizeof(resp);
-  if (aResponseBuff) {
-    ios[1].iov_base = aResponseBuff;
-    ios[1].iov_len = aReq->mBufSize;
-  } else {
-    ios[1].iov_base = nullptr;
-    ios[1].iov_len = 0;
-  }
-
-  // Wait for response and return appropriately.
-  int openedFd = -1;
-  const ssize_t recvd = RecvWithFd(respFds[0], ios, aResponseBuff ? 2 : 1,
-                                   expectFd ? &openedFd : nullptr);
-  const int recvErrno = errno;
-  close(respFds[0]);
-  if (recvd < 0) {
-    return -recvErrno;
-  }
-  if (recvd == 0) {
-    SANDBOX_LOG_ERROR("Unexpected EOF, op %d flags 0%o path %s",
-                      aReq->mOp, aReq->mFlags, path);
-    return -EIO;
-  }
-  MOZ_ASSERT(static_cast<size_t>(recvd) <= ios[0].iov_len + ios[1].iov_len);
-  // Some calls such as readlink return a size if successful
-  if (resp.mError >= 0) {
-    // Success!
-    if (expectFd) {
-      MOZ_ASSERT(openedFd >= 0);
-      return openedFd;
-    }
-    return resp.mError;
-  }
-  if (SandboxInfo::Get().Test(SandboxInfo::kVerbose)) {
-    // Keep in mind that "rejected" files can include ones that don't
-    // actually exist, if it's something that's optional or part of a
-    // search path (e.g., shared libraries).  In those cases, this
-    // error message is expected.
-    SANDBOX_LOG_ERROR("Rejected errno %d op %d flags 0%o path %s",
-                      resp.mError, aReq->mOp, aReq->mFlags, path);
-  }
-  if (openedFd >= 0) {
-    close(openedFd);
-  }
-  return resp.mError;
-}
-
-int
-SandboxBrokerClient::Open(const char* aPath, int aFlags)
-{
-  Request req = { SANDBOX_FILE_OPEN, aFlags, 0 };
-  int maybeFd = DoCall(&req, aPath, nullptr, nullptr, true);
-  if (maybeFd >= 0) {
-    // NSPR has opinions about file flags.  Fix O_CLOEXEC.
-    if ((aFlags & O_CLOEXEC) == 0) {
-      fcntl(maybeFd, F_SETFD, 0);
-    }
-  }
-  return maybeFd;
-}
-
-int
-SandboxBrokerClient::Access(const char* aPath, int aMode)
-{
-  Request req = { SANDBOX_FILE_ACCESS, aMode, 0 };
-  return DoCall(&req, aPath, nullptr, nullptr, false);
-}
-
-int
-SandboxBrokerClient::Stat(const char* aPath, statstruct* aStat)
-{
-  Request req = { SANDBOX_FILE_STAT, 0, sizeof(statstruct) };
-  return DoCall(&req, aPath, nullptr, (void*)aStat, false);
-}
-
-int
-SandboxBrokerClient::LStat(const char* aPath, statstruct* aStat)
-{
-  Request req = { SANDBOX_FILE_STAT, O_NOFOLLOW, sizeof(statstruct) };
-  return DoCall(&req, aPath, nullptr, (void*)aStat, false);
-}
-
-int
-SandboxBrokerClient::Chmod(const char* aPath, int aMode)
-{
-  Request req = {SANDBOX_FILE_CHMOD, aMode, 0};
-  return DoCall(&req, aPath, nullptr, nullptr, false);
-}
-
-int
-SandboxBrokerClient::Link(const char* aOldPath, const char* aNewPath)
-{
-  Request req = {SANDBOX_FILE_LINK, 0, 0};
-  return DoCall(&req, aOldPath, aNewPath, nullptr, false);
-}
-
-int
-SandboxBrokerClient::Symlink(const char* aOldPath, const char* aNewPath)
-{
-  Request req = {SANDBOX_FILE_SYMLINK, 0, 0};
-  return DoCall(&req, aOldPath, aNewPath, nullptr, false);
-}
-
-int
-SandboxBrokerClient::Rename(const char* aOldPath, const char* aNewPath)
-{
-  Request req = {SANDBOX_FILE_RENAME, 0, 0};
-  return DoCall(&req, aOldPath, aNewPath, nullptr, false);
-}
-
-int
-SandboxBrokerClient::Mkdir(const char* aPath, int aMode)
-{
-  Request req = {SANDBOX_FILE_MKDIR, aMode, 0};
-  return DoCall(&req, aPath, nullptr, nullptr, false);
-}
-
-int
-SandboxBrokerClient::Unlink(const char* aPath)
-{
-  Request req = {SANDBOX_FILE_UNLINK, 0, 0};
-  return DoCall(&req, aPath, nullptr, nullptr, false);
-}
-
-int
-SandboxBrokerClient::Rmdir(const char* aPath)
-{
-  Request req = {SANDBOX_FILE_RMDIR, 0, 0};
-  return DoCall(&req, aPath, nullptr, nullptr, false);
-}
-
-int
-SandboxBrokerClient::Readlink(const char* aPath, void* aBuff, size_t aSize)
-{
-  Request req = {SANDBOX_FILE_READLINK, 0, aSize};
-  return DoCall(&req, aPath, nullptr, aBuff, false);
-}
-
-} // namespace mozilla
-