| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `/root/sunhe/incubator-teaclave/third_party/rust-sgx-sdk/sgx_protected_fs/tfs/src/sys/file/open.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>open.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../../../normalize.css"><link rel="stylesheet" href="../../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../../../ayu.css" disabled><link rel="stylesheet" href="../../../../dark.css" disabled><link rel="stylesheet" href="../../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../../storage.js"></script><script defer src="../../../../source-script.js"></script><script defer src="../../../../source-files.js"></script><script defer src="../../../../main.js"></script><noscript><link rel="stylesheet" href="../../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../../../sgx_tprotected_fs/index.html"><div class="logo-container"><img class="rust-logo" src="../../../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../../../sgx_tprotected_fs/index.html"><img class="rust-logo" src="../../../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="comment">// Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License.. |
| |
| </span><span class="kw">use </span><span class="kw">crate</span>::sys::cache::LruCache; |
| <span class="kw">use </span><span class="kw">crate</span>::sys::error::FsResult; |
| <span class="kw">use </span><span class="kw">crate</span>::sys::file::{FileInner, FileStatus, OpenMode, OpenOptions}; |
| <span class="kw">use </span><span class="kw">crate</span>::sys::host::{<span class="self">self</span>, HostFile, HostFs}; |
| <span class="kw">use </span><span class="kw">crate</span>::sys::keys::{FsKeyGen, RestoreKey}; |
| <span class="kw">use </span><span class="kw">crate</span>::sys::metadata::MetadataInfo; |
| <span class="kw">use </span><span class="kw">crate</span>::sys::metadata::{ |
| FILENAME_MAX_LEN, FULLNAME_MAX_LEN, MD_USER_DATA_SIZE, SGX_FILE_ID, SGX_FILE_MAJOR_VERSION, |
| }; |
| <span class="kw">use </span><span class="kw">crate</span>::sys::node::{FileNode, FileNodeRef}; |
| <span class="kw">use </span>sgx_types::error::errno::<span class="kw-2">*</span>; |
| <span class="kw">use </span>sgx_types::error::SgxStatus; |
| <span class="kw">use </span>sgx_types::memeq::ConstTimeEq; |
| <span class="kw">use </span>sgx_types::metadata::SE_PAGE_SIZE; |
| <span class="kw">use </span>sgx_types::types::Key128bit; |
| <span class="kw">use </span>std::borrow::ToOwned; |
| <span class="kw">use </span>std::path::Path; |
| |
| <span class="macro">macro_rules! </span>is_page_aligned { |
| (<span class="macro-nonterminal">$num</span>:expr) => { |
| <span class="macro-nonterminal">$num </span>& (SE_PAGE_SIZE - <span class="number">1</span>) == <span class="number">0 |
| </span>}; |
| } |
| |
| <span class="kw">pub const </span>DEFAULT_CACHE_SIZE: usize = <span class="number">48 </span>* SE_PAGE_SIZE; |
| |
| <span class="kw">impl </span>FileInner { |
| <span class="kw">pub fn </span>open( |
| path: <span class="kw-2">&</span>Path, |
| opts: <span class="kw-2">&</span>OpenOptions, |
| mode: <span class="kw-2">&</span>OpenMode, |
| cache_size: <span class="prelude-ty">Option</span><usize>, |
| ) -> FsResult<<span class="self">Self</span>> { |
| <span class="kw">let </span>cache_size = <span class="self">Self</span>::check_cache_size(cache_size)<span class="question-mark">?</span>; |
| <span class="kw">let </span>file_name = path.file_name().ok_or(EINVAL)<span class="question-mark">?</span>.to_str().ok_or(EINVAL)<span class="question-mark">?</span>; |
| <span class="self">Self</span>::check_open_param(path, file_name, opts, mode)<span class="question-mark">?</span>; |
| |
| <span class="kw">let </span>key_gen = FsKeyGen::new(mode)<span class="question-mark">?</span>; |
| |
| <span class="self">Self</span>::check_file_exist(opts, mode, path)<span class="question-mark">?</span>; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>host_file = HostFile::open(path, opts.readonly())<span class="question-mark">?</span>; |
| <span class="kw">let </span>file_size = host_file.size(); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>recovery_file_name = file_name.to_owned(); |
| recovery_file_name.push_str(<span class="string">"_recovery"</span>); |
| <span class="kw">let </span>recovery_path = path.with_file_name(recovery_file_name); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>need_writing = <span class="bool-val">false</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>offset = <span class="number">0</span>; |
| <span class="kw">let </span>(host_file, metadata, root_mht) = <span class="kw">if </span>file_size > <span class="number">0 </span>{ |
| <span class="comment">// existing file |
| </span><span class="macro">ensure!</span>(!opts.write, <span class="macro">eos!</span>(EACCES)); |
| |
| <span class="kw">let </span>(host_file, metadata, root_mht) = |
| <span class="kw">match </span><span class="self">Self</span>::open_file(<span class="kw-2">&mut </span>host_file, file_name, <span class="kw-2">&</span>key_gen, mode) { |
| <span class="prelude-val">Ok</span>((metadata, root_mht)) => (host_file, metadata, root_mht), |
| <span class="prelude-val">Err</span>(e) <span class="kw">if </span>e.equal_to_sgx_error(SgxStatus::RecoveryNeeded) => { |
| <span class="kw">let </span><span class="kw-2">mut </span>host_file = |
| <span class="self">Self</span>::recover_and_reopen_file(host_file, path, <span class="kw-2">&</span>recovery_path, opts)<span class="question-mark">?</span>; |
| |
| <span class="kw">let </span>(metadata, root_mht) = |
| <span class="self">Self</span>::open_file(<span class="kw-2">&mut </span>host_file, file_name, <span class="kw-2">&</span>key_gen, mode)<span class="question-mark">?</span>; |
| (host_file, metadata, root_mht) |
| } |
| <span class="prelude-val">Err</span>(e) => <span class="macro">bail!</span>(e), |
| }; |
| |
| <span class="kw">if </span>opts.append && !opts.update { |
| offset = metadata.encrypted_plain.size; |
| } |
| (host_file, metadata, root_mht) |
| } <span class="kw">else </span>{ |
| <span class="kw">let </span>metadata = <span class="self">Self</span>::new_file(file_name, mode)<span class="question-mark">?</span>; |
| need_writing = <span class="bool-val">true</span>; |
| (host_file, metadata, FileNode::new_root_ref(mode.into())) |
| }; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>protected_file = <span class="self">Self </span>{ |
| host_file, |
| metadata, |
| root_mht, |
| key_gen, |
| opts: <span class="kw-2">*</span>opts, |
| need_writing, |
| end_of_file: <span class="bool-val">false</span>, |
| max_cache_page: cache_size, |
| offset, |
| last_error: <span class="macro">esgx!</span>(SgxStatus::Success), |
| status: FileStatus::NotInitialized, |
| recovery_path, |
| cache: LruCache::new(cache_size), |
| }; |
| |
| protected_file.status = FileStatus::Ok; |
| <span class="prelude-val">Ok</span>(protected_file) |
| } |
| |
| <span class="kw">fn </span>open_file( |
| host_file: <span class="kw-2">&mut </span><span class="kw">dyn </span>HostFs, |
| file_name: <span class="kw-2">&</span>str, |
| key_gen: <span class="kw-2">&</span><span class="kw">dyn </span>RestoreKey, |
| mode: <span class="kw-2">&</span>OpenMode, |
| ) -> FsResult<(MetadataInfo, FileNodeRef)> { |
| <span class="kw">let </span><span class="kw-2">mut </span>metadata = MetadataInfo::default(); |
| metadata.read_from_disk(host_file)<span class="question-mark">?</span>; |
| |
| <span class="macro">ensure!</span>( |
| metadata.node.metadata.plaintext.file_id == SGX_FILE_ID, |
| <span class="macro">esgx!</span>(SgxStatus::NotSgxFile) |
| ); |
| <span class="macro">ensure!</span>( |
| metadata.node.metadata.plaintext.major_version == SGX_FILE_MAJOR_VERSION, |
| <span class="macro">eos!</span>(ENOTSUP) |
| ); |
| <span class="macro">ensure!</span>(!metadata.update_flag(), <span class="macro">esgx!</span>(SgxStatus::RecoveryNeeded)); |
| |
| <span class="kw">let </span>encrypt_flags = mode.into(); |
| <span class="macro">ensure!</span>(encrypt_flags == metadata.encrypt_flags(), <span class="macro">eos!</span>(EINVAL)); |
| |
| <span class="kw">let </span>key_policy = mode.key_policy(); |
| <span class="kw">if </span>mode.is_auto_key() { |
| <span class="macro">ensure!</span>(key_policy.unwrap() == metadata.key_policy(), <span class="macro">eos!</span>(EINVAL)); |
| } |
| |
| <span class="kw">let </span>key = <span class="kw">match </span>mode.import_key() { |
| <span class="prelude-val">Some</span>(key) => { |
| metadata.set_key_policy(key_policy.unwrap()); |
| <span class="kw-2">*</span>key |
| } |
| <span class="prelude-val">None </span>=> metadata.restore_key(key_gen)<span class="question-mark">?</span>, |
| }; |
| metadata.decrypt(<span class="kw-2">&</span>key)<span class="question-mark">?</span>; |
| |
| <span class="kw">let </span>meta_file_name = metadata.file_name()<span class="question-mark">?</span>; |
| <span class="macro">ensure!</span>(meta_file_name == file_name, <span class="macro">esgx!</span>(SgxStatus::NameMismatch)); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>root_mht = FileNode::new_root(encrypt_flags); |
| <span class="kw">if </span>metadata.encrypted_plain.size > MD_USER_DATA_SIZE { |
| root_mht.read_from_disk(host_file)<span class="question-mark">?</span>; |
| root_mht.decrypt( |
| <span class="kw-2">&</span>metadata.encrypted_plain.mht_key, |
| <span class="kw-2">&</span>metadata.encrypted_plain.mht_gmac, |
| )<span class="question-mark">?</span>; |
| root_mht.new_node = <span class="bool-val">false</span>; |
| } |
| <span class="prelude-val">Ok</span>((metadata, FileNode::build_ref(root_mht))) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>new_file(file_name: <span class="kw-2">&</span>str, mode: <span class="kw-2">&</span>OpenMode) -> FsResult<MetadataInfo> { |
| <span class="kw">let </span><span class="kw-2">mut </span>metadata = MetadataInfo::new(); |
| |
| metadata.set_encrypt_flags(mode.into()); |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(key_policy) = mode.key_policy() { |
| metadata.set_key_policy(key_policy); |
| } |
| metadata.encrypted_plain.file_name[<span class="number">0</span>..file_name.len()] |
| .copy_from_slice(file_name.as_bytes()); |
| |
| <span class="prelude-val">Ok</span>(metadata) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>recover_and_reopen_file( |
| host_file: HostFile, |
| path: <span class="kw-2">&</span>Path, |
| recovery_path: <span class="kw-2">&</span>Path, |
| opts: <span class="kw-2">&</span>OpenOptions, |
| ) -> FsResult<HostFile> { |
| <span class="kw">let </span>file_size = host_file.size(); |
| drop(host_file); |
| |
| host::recovery(path, recovery_path)<span class="question-mark">?</span>; |
| <span class="kw">let </span>host_file = HostFile::open(path, opts.readonly())<span class="question-mark">?</span>; |
| <span class="macro">ensure!</span>(host_file.size() == file_size, <span class="macro">esgx!</span>(SgxStatus::Unexpected)); |
| <span class="prelude-val">Ok</span>(host_file) |
| } |
| |
| <span class="kw">fn </span>check_file_exist(opts: <span class="kw-2">&</span>OpenOptions, mode: <span class="kw-2">&</span>OpenMode, path: <span class="kw-2">&</span>Path) -> FsResult { |
| <span class="kw">let </span>is_exist = host::try_exists(path)<span class="question-mark">?</span>; |
| |
| <span class="kw">if </span>opts.read || mode.import_key().is_some() { |
| <span class="macro">ensure!</span>(is_exist, <span class="macro">eos!</span>(ENOENT)); |
| } |
| <span class="kw">if </span>opts.write && is_exist { |
| <span class="comment">// try to delete existing file |
| </span>host::remove(path)<span class="question-mark">?</span>; |
| <span class="comment">// re-check |
| </span><span class="kw">let </span>is_exist = host::try_exists(path)<span class="question-mark">?</span>; |
| <span class="macro">ensure!</span>(!is_exist, <span class="macro">eos!</span>(EACCES)); |
| } |
| |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>check_open_param(path: <span class="kw-2">&</span>Path, name: <span class="kw-2">&</span>str, opts: <span class="kw-2">&</span>OpenOptions, mode: <span class="kw-2">&</span>OpenMode) -> FsResult { |
| <span class="kw">let </span>path_len = path.to_str().ok_or(EINVAL)<span class="question-mark">?</span>.len(); |
| <span class="macro">ensure!</span>( |
| (path_len > <span class="number">0 </span>&& path_len < FULLNAME_MAX_LEN - <span class="number">1</span>), |
| <span class="macro">eos!</span>(EINVAL) |
| ); |
| |
| <span class="kw">let </span>name_len = name.len(); |
| <span class="macro">ensure!</span>(name_len > <span class="number">0</span>, <span class="macro">eos!</span>(EINVAL)); |
| <span class="macro">ensure!</span>(name_len < FILENAME_MAX_LEN - <span class="number">1</span>, <span class="macro">eos!</span>(ENAMETOOLONG)); |
| |
| opts.check()<span class="question-mark">?</span>; |
| mode.check()<span class="question-mark">?</span>; |
| |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(key) = mode.import_key() { |
| <span class="macro">ensure!</span>(key.ct_ne(<span class="kw-2">&</span>Key128bit::default()), <span class="macro">eos!</span>(EINVAL)); |
| } |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>check_cache_size(cache_size: <span class="prelude-ty">Option</span><usize>) -> FsResult<usize> { |
| cache_size |
| .or(<span class="prelude-val">Some</span>(DEFAULT_CACHE_SIZE)) |
| .and_then(|cache_size| { |
| <span class="kw">if </span><span class="macro">is_page_aligned!</span>(cache_size) && cache_size >= DEFAULT_CACHE_SIZE { |
| <span class="prelude-val">Some</span>(cache_size / SE_PAGE_SIZE) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>} |
| }) |
| .ok_or_else(|| <span class="macro">eos!</span>(EINVAL)) |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../../" data-current-crate="sgx_tprotected_fs" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |