diff options
Diffstat (limited to 'sandbox/linux/seccomp/access.cc')
-rw-r--r-- | sandbox/linux/seccomp/access.cc | 97 |
1 files changed, 0 insertions, 97 deletions
diff --git a/sandbox/linux/seccomp/access.cc b/sandbox/linux/seccomp/access.cc deleted file mode 100644 index fbe7e53..0000000 --- a/sandbox/linux/seccomp/access.cc +++ /dev/null @@ -1,97 +0,0 @@ -// Copyright (c) 2010 The Chromium Authors. All rights reserved. -// Use of this source code is governed by a BSD-style license that can be -// found in the LICENSE file. - -#include "debug.h" -#include "sandbox_impl.h" - -namespace playground { - -long Sandbox::sandbox_access(const char *pathname, int mode) { - long long tm; - Debug::syscall(&tm, __NR_access, "Executing handler"); - size_t len = strlen(pathname); - struct Request { - int sysnum; - long long cookie; - Access access_req; - char pathname[0]; - } __attribute__((packed)) *request; - char data[sizeof(struct Request) + len]; - request = reinterpret_cast<struct Request*>(data); - request->sysnum = __NR_access; - request->cookie = cookie(); - request->access_req.path_length = len; - request->access_req.mode = mode; - memcpy(request->pathname, pathname, len); - - long rc; - SysCalls sys; - if (write(sys, processFdPub(), request, sizeof(data)) != (int)sizeof(data) || - read(sys, threadFdPub(), &rc, sizeof(rc)) != sizeof(rc)) { - die("Failed to forward access() request [sandbox]"); - } - Debug::elapsed(tm, __NR_access); - return rc; -} - -bool Sandbox::process_access(int parentMapsFd, int sandboxFd, int threadFdPub, - int threadFd, SecureMem::Args* mem) { - // Read request - SysCalls sys; - Access access_req; - if (read(sys, sandboxFd, &access_req, sizeof(access_req)) != - sizeof(access_req)) { - read_parm_failed: - die("Failed to read parameters for access() [process]"); - } - int rc = -ENAMETOOLONG; - if (access_req.path_length >= sizeof(mem->pathname)) { - char buf[32]; - while (access_req.path_length > 0) { - size_t len = access_req.path_length > sizeof(buf) ? - sizeof(buf) : access_req.path_length; - ssize_t i = read(sys, sandboxFd, buf, len); - if (i <= 0) { - goto read_parm_failed; - } - access_req.path_length -= i; - } - if (write(sys, threadFd, &rc, sizeof(rc)) != sizeof(rc)) { - die("Failed to return data from access() [process]"); - } - return false; - } - - if (!g_policy.allow_file_namespace) { - // After locking the mutex, we can no longer abandon the system call. So, - // perform checks before clobbering the securely shared memory. - char tmp[access_req.path_length]; - if (read(sys, sandboxFd, tmp, access_req.path_length) != - (ssize_t)access_req.path_length) { - goto read_parm_failed; - } - Debug::message(("Denying access to \"" + std::string(tmp) + "\"").c_str()); - SecureMem::abandonSystemCall(threadFd, -EACCES); - return false; - } - - SecureMem::lockSystemCall(parentMapsFd, mem); - if (read(sys, sandboxFd, mem->pathname, access_req.path_length) != - (ssize_t)access_req.path_length) { - goto read_parm_failed; - } - mem->pathname[access_req.path_length] = '\000'; - - // TODO(markus): Implement sandboxing policy - Debug::message(("Allowing access to \"" + std::string(mem->pathname) + - "\"").c_str()); - - // Tell trusted thread to access the file. - SecureMem::sendSystemCall(threadFdPub, true, parentMapsFd, mem, __NR_access, - mem->pathname - (char*)mem + (char*)mem->self, - access_req.mode); - return true; -} - -} // namespace |