| <!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/metadata.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>metadata.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::error::FsResult; |
| <span class="kw">use </span><span class="kw">crate</span>::sys::file::OpenMode; |
| <span class="kw">use </span><span class="kw">crate</span>::sys::host::HostFs; |
| <span class="kw">use </span><span class="kw">crate</span>::sys::keys::{DeriveKey, KeyType, RestoreKey}; |
| <span class="kw">use </span><span class="kw">crate</span>::sys::node::{META_DATA_PHY_NUM, NODE_SIZE}; |
| <span class="kw">use </span>sgx_crypto::aes::gcm::{Aad, AesGcm, Nonce}; |
| <span class="kw">use </span>sgx_types::error::SgxStatus; |
| <span class="kw">use </span>sgx_types::types::{Attributes, CpuSvn, Key128bit, KeyId, KeyPolicy, Mac128bit}; |
| <span class="kw">use </span>std::ffi::CStr; |
| <span class="kw">use </span>std::mem; |
| |
| <span class="kw">pub const </span>SGX_FILE_ID: u64 = <span class="number">0x5347_585F_4649_4C45</span>; |
| <span class="kw">pub const </span>SGX_FILE_MAJOR_VERSION: u8 = <span class="number">0x01</span>; |
| <span class="kw">pub const </span>SGX_FILE_MINOR_VERSION: u8 = <span class="number">0x00</span>; |
| |
| <span class="macro">impl_enum! </span>{ |
| <span class="attribute">#[repr(u8)] |
| #[derive(Clone, Copy, Debug, Eq, PartialEq, Ord, PartialOrd)] |
| </span><span class="kw">pub enum </span>EncryptFlags { |
| AutoKey = <span class="number">0x00</span>, |
| UserKey = <span class="number">0x01</span>, |
| IntegrityOnly = <span class="number">0x02</span>, |
| } |
| } |
| |
| <span class="kw">impl </span>EncryptFlags { |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>is_auto_key(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="macro">matches!</span>(<span class="kw-2">*</span><span class="self">self</span>, EncryptFlags::AutoKey) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>is_user_key(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="macro">matches!</span>(<span class="kw-2">*</span><span class="self">self</span>, EncryptFlags::UserKey) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>is_integrity_only(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="macro">matches!</span>(<span class="kw-2">*</span><span class="self">self</span>, EncryptFlags::IntegrityOnly) |
| } |
| } |
| |
| <span class="kw">impl </span>From<<span class="kw-2">&</span>OpenMode> <span class="kw">for </span>EncryptFlags { |
| <span class="kw">fn </span>from(mode: <span class="kw-2">&</span>OpenMode) -> <span class="self">Self </span>{ |
| <span class="kw">match </span>mode { |
| OpenMode::AutoKey(<span class="kw">_</span>) | OpenMode::ExportKey | OpenMode::ImportKey(<span class="kw">_</span>) => <span class="self">Self</span>::AutoKey, |
| OpenMode::UserKey(<span class="kw">_</span>) => <span class="self">Self</span>::UserKey, |
| OpenMode::IntegrityOnly => <span class="self">Self</span>::IntegrityOnly, |
| } |
| } |
| } |
| |
| <span class="attribute">#[derive(Clone, Copy, Debug, Default)] |
| #[repr(C)] |
| </span><span class="kw">pub struct </span>MetadataPlain { |
| <span class="kw">pub </span>file_id: u64, |
| <span class="kw">pub </span>major_version: u8, |
| <span class="kw">pub </span>minor_version: u8, |
| <span class="kw">pub </span>encrypt_flags: EncryptFlags, |
| <span class="kw">pub </span>update_flag: u8, |
| <span class="kw">pub </span>key_policy: KeyPolicy, |
| <span class="kw">pub </span>isv_svn: u16, |
| <span class="kw">pub </span>key_id: KeyId, |
| <span class="kw">pub </span>cpu_svn: CpuSvn, |
| <span class="kw">pub </span>attribute_mask: Attributes, |
| <span class="kw">pub </span>gmac: Mac128bit, |
| } |
| |
| <span class="kw">impl </span>MetadataPlain { |
| <span class="kw">fn </span>new() -> MetadataPlain { |
| MetadataPlain { |
| file_id: SGX_FILE_ID, |
| major_version: SGX_FILE_MAJOR_VERSION, |
| minor_version: SGX_FILE_MINOR_VERSION, |
| ..Default::default() |
| } |
| } |
| } |
| |
| <span class="kw">pub const </span>MD_USER_DATA_SIZE: usize = NODE_SIZE * <span class="number">3 </span>/ <span class="number">4</span>; <span class="comment">// 3072 |
| </span><span class="kw">pub const </span>FILENAME_MAX_LEN: usize = <span class="number">260</span>; |
| <span class="kw">pub const </span>PATHNAME_MAX_LEN: usize = <span class="number">512</span>; |
| <span class="kw">pub const </span>FULLNAME_MAX_LEN: usize = PATHNAME_MAX_LEN + FILENAME_MAX_LEN; |
| |
| <span class="attribute">#[derive(Clone, Copy, Debug)] |
| #[repr(C, packed)] |
| </span><span class="kw">pub struct </span>MetadataEncrypted { |
| <span class="kw">pub </span>file_name: [u8; FILENAME_MAX_LEN], |
| <span class="kw">pub </span>size: usize, |
| <span class="kw">pub </span>mht_key: Key128bit, |
| <span class="kw">pub </span>mht_gmac: Mac128bit, |
| <span class="kw">pub </span>data: [u8; MD_USER_DATA_SIZE], |
| } |
| |
| <span class="kw">const </span>METADATA_PADDING: usize = |
| NODE_SIZE - mem::size_of::<MetadataPlain>() - mem::size_of::<MetadataEncrypted>(); |
| <span class="kw">const </span>METADATA_ENCRYPTED: usize = mem::size_of::<MetadataEncrypted>(); |
| |
| <span class="attribute">#[derive(Clone, Copy, Debug)] |
| #[repr(C)] |
| </span><span class="kw">pub struct </span>Metadata { |
| <span class="kw">pub </span>plaintext: MetadataPlain, |
| <span class="kw">pub </span>ciphertext: [u8; METADATA_ENCRYPTED], |
| <span class="kw">pub </span>padding: [u8; METADATA_PADDING], |
| } |
| |
| <span class="kw">impl </span>Metadata { |
| <span class="kw">fn </span>new() -> Metadata { |
| Metadata { |
| plaintext: MetadataPlain::new(), |
| ciphertext: [<span class="number">0_u8</span>; METADATA_ENCRYPTED], |
| padding: [<span class="number">0_u8</span>; METADATA_PADDING], |
| } |
| } |
| } |
| |
| <span class="attribute">#[derive(Copy, Clone, Debug, Default)] |
| #[repr(C)] |
| </span><span class="kw">pub struct </span>MetadataNode { |
| <span class="kw">pub </span>node_number: u64, |
| <span class="kw">pub </span>metadata: Metadata, |
| } |
| |
| <span class="kw">impl </span>MetadataNode { |
| <span class="kw">fn </span>new() -> MetadataNode { |
| MetadataNode { |
| node_number: META_DATA_PHY_NUM, |
| metadata: Metadata::new(), |
| } |
| } |
| } |
| |
| <span class="macro">impl_struct_default! </span>{ |
| Metadata; |
| MetadataEncrypted; |
| } |
| |
| <span class="macro">impl_asref_slice! </span>{ |
| MetadataPlain; |
| MetadataEncrypted; |
| Metadata; |
| MetadataNode; |
| } |
| |
| <span class="macro">impl_asmut_slice! </span>{ |
| MetadataPlain; |
| MetadataEncrypted; |
| Metadata; |
| MetadataNode; |
| } |
| |
| <span class="macro">impl_struct_ContiguousMemory! </span>{ |
| MetadataPlain; |
| MetadataEncrypted; |
| Metadata; |
| MetadataNode; |
| } |
| |
| <span class="attribute">#[derive(Clone, Debug, Default)] |
| </span><span class="kw">pub struct </span>MetadataInfo { |
| <span class="kw">pub </span>node: MetadataNode, |
| <span class="kw">pub </span>encrypted_plain: MetadataEncrypted, |
| } |
| |
| <span class="kw">impl </span>MetadataInfo { |
| <span class="kw">pub fn </span>new() -> MetadataInfo { |
| MetadataInfo { |
| node: MetadataNode::new(), |
| encrypted_plain: MetadataEncrypted::default(), |
| } |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>integrity_only(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.encrypt_flags().is_integrity_only() |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>encrypt_flags(<span class="kw-2">&</span><span class="self">self</span>) -> EncryptFlags { |
| <span class="self">self</span>.node.metadata.plaintext.encrypt_flags |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>set_encrypt_flags(<span class="kw-2">&mut </span><span class="self">self</span>, encrypt_flags: EncryptFlags) { |
| <span class="self">self</span>.node.metadata.plaintext.encrypt_flags = encrypt_flags; |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>key_policy(<span class="kw-2">&</span><span class="self">self</span>) -> KeyPolicy { |
| <span class="self">self</span>.node.metadata.plaintext.key_policy |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>set_key_policy(<span class="kw-2">&mut </span><span class="self">self</span>, key_policy: KeyPolicy) { |
| <span class="self">self</span>.node.metadata.plaintext.key_policy = key_policy; |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>update_flag(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.node.metadata.plaintext.update_flag != <span class="number">0 |
| </span>} |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>set_update_flag(<span class="kw-2">&mut </span><span class="self">self</span>, flag: u8) { |
| <span class="self">self</span>.node.metadata.plaintext.update_flag = flag; |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>file_name(<span class="kw-2">&</span><span class="self">self</span>) -> FsResult<<span class="kw-2">&</span>str> { |
| <span class="kw">let </span>len = <span class="self">self |
| </span>.encrypted_plain |
| .file_name |
| .iter() |
| .enumerate() |
| .find(|x| <span class="kw-2">*</span>x.<span class="number">1 </span>== <span class="number">0</span>) |
| .map(|x| x.<span class="number">0 </span>+ <span class="number">1</span>) |
| .ok_or(SgxStatus::Unexpected)<span class="question-mark">?</span>; |
| <span class="kw">let </span>name = CStr::from_bytes_with_nul(<span class="kw-2">&</span><span class="self">self</span>.encrypted_plain.file_name[<span class="number">0</span>..len]) |
| .map_err(|<span class="kw">_</span>| SgxStatus::Unexpected)<span class="question-mark">? |
| </span>.to_str() |
| .map_err(|<span class="kw">_</span>| SgxStatus::Unexpected)<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(name) |
| } |
| |
| <span class="kw">pub fn </span>encrypt(<span class="kw-2">&mut </span><span class="self">self</span>, key: <span class="kw-2">&</span>Key128bit) -> FsResult { |
| <span class="kw">let </span>mac = <span class="kw">if </span>!<span class="self">self</span>.integrity_only() { |
| <span class="kw">let </span><span class="kw-2">mut </span>aes = AesGcm::new(key, Nonce::zeroed(), Aad::empty())<span class="question-mark">?</span>; |
| aes.encrypt( |
| <span class="self">self</span>.encrypted_plain.as_ref(), |
| <span class="self">self</span>.node.metadata.ciphertext.as_mut(), |
| )<span class="question-mark">? |
| </span>} <span class="kw">else </span>{ |
| <span class="kw">let </span><span class="kw-2">mut </span>aes = AesGcm::new(key, Nonce::zeroed(), Aad::from(<span class="kw-2">&</span><span class="self">self</span>.encrypted_plain))<span class="question-mark">?</span>; |
| <span class="kw">let </span>mac = aes.encrypt(<span class="kw-2">&</span>[], <span class="kw-2">&mut </span>[])<span class="question-mark">?</span>; |
| <span class="self">self</span>.node |
| .metadata |
| .ciphertext |
| .as_mut() |
| .copy_from_slice(<span class="self">self</span>.encrypted_plain.as_ref()); |
| mac |
| }; |
| |
| <span class="self">self</span>.node.metadata.plaintext.gmac = mac; |
| |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="kw">pub fn </span>decrypt(<span class="kw-2">&mut </span><span class="self">self</span>, key: <span class="kw-2">&</span>Key128bit) -> FsResult { |
| <span class="kw">if </span>!<span class="self">self</span>.integrity_only() { |
| <span class="kw">let </span><span class="kw-2">mut </span>aes = AesGcm::new(key, Nonce::zeroed(), Aad::empty())<span class="question-mark">?</span>; |
| aes.decrypt( |
| <span class="self">self</span>.node.metadata.ciphertext.as_ref(), |
| <span class="self">self</span>.encrypted_plain.as_mut(), |
| <span class="kw-2">&</span><span class="self">self</span>.node.metadata.plaintext.gmac, |
| )<span class="question-mark">? |
| </span>} <span class="kw">else </span>{ |
| <span class="kw">let </span><span class="kw-2">mut </span>aes = AesGcm::new( |
| key, |
| Nonce::zeroed(), |
| Aad::from(<span class="kw-2">&</span><span class="self">self</span>.node.metadata.ciphertext), |
| )<span class="question-mark">?</span>; |
| aes.decrypt(<span class="kw-2">&</span>[], <span class="kw-2">&mut </span>[], <span class="kw-2">&</span><span class="self">self</span>.node.metadata.plaintext.gmac)<span class="question-mark">?</span>; |
| <span class="self">self</span>.encrypted_plain |
| .as_mut() |
| .copy_from_slice(<span class="self">self</span>.node.metadata.ciphertext.as_ref()); |
| }; |
| |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="kw">pub fn </span>derive_key(<span class="kw-2">&mut </span><span class="self">self</span>, derive: <span class="kw-2">&mut </span><span class="kw">dyn </span>DeriveKey) -> FsResult<Key128bit> { |
| <span class="kw">let </span>(key, key_id) = derive.derive_key(KeyType::Metadata, <span class="number">0</span>)<span class="question-mark">?</span>; |
| <span class="kw">match </span><span class="self">self</span>.encrypt_flags() { |
| EncryptFlags::AutoKey => { |
| <span class="macro">cfg_if! </span>{ |
| <span class="kw">if </span><span class="attribute">#[cfg(feature = <span class="string">"tfs"</span>)] </span>{ |
| <span class="kw">use </span>sgx_tse::EnclaveReport; |
| <span class="kw">use </span>sgx_types::types::Report; |
| |
| <span class="self">self</span>.node.metadata.plaintext.key_id = key_id; |
| |
| <span class="kw">let </span>report = Report::get_self(); |
| <span class="self">self</span>.node.metadata.plaintext.cpu_svn = report.body.cpu_svn; |
| <span class="self">self</span>.node.metadata.plaintext.isv_svn = report.body.isv_svn; |
| } <span class="kw">else </span>{ |
| <span class="kw">use </span>sgx_types::error::errno::ENOTSUP; |
| <span class="macro">bail!</span>(<span class="macro">eos!</span>(ENOTSUP)); |
| } |
| } |
| } |
| EncryptFlags::UserKey => { |
| <span class="self">self</span>.node.metadata.plaintext.key_id = key_id; |
| } |
| EncryptFlags::IntegrityOnly => {} |
| } |
| <span class="prelude-val">Ok</span>(key) |
| } |
| |
| <span class="kw">pub fn </span>restore_key(<span class="kw-2">&</span><span class="self">self</span>, restore: <span class="kw-2">&</span><span class="kw">dyn </span>RestoreKey) -> FsResult<Key128bit> { |
| <span class="kw">match </span><span class="self">self</span>.encrypt_flags() { |
| EncryptFlags::AutoKey => { |
| <span class="macro">cfg_if! </span>{ |
| <span class="kw">if </span><span class="attribute">#[cfg(feature = <span class="string">"tfs"</span>)] </span>{ |
| restore.restore_key( |
| KeyType::Metadata, |
| <span class="self">self</span>.node.metadata.plaintext.key_id, |
| <span class="prelude-val">Some</span>(<span class="self">self</span>.node.metadata.plaintext.key_policy), |
| <span class="prelude-val">Some</span>(<span class="self">self</span>.node.metadata.plaintext.cpu_svn), |
| <span class="prelude-val">Some</span>(<span class="self">self</span>.node.metadata.plaintext.isv_svn), |
| ) |
| } <span class="kw">else </span>{ |
| <span class="kw">use </span>sgx_types::error::errno::ENOTSUP; |
| <span class="macro">bail!</span>(<span class="macro">eos!</span>(ENOTSUP)); |
| } |
| } |
| } |
| EncryptFlags::UserKey | EncryptFlags::IntegrityOnly => restore.restore_key( |
| KeyType::Metadata, |
| <span class="self">self</span>.node.metadata.plaintext.key_id, |
| <span class="prelude-val">None</span>, |
| <span class="prelude-val">None</span>, |
| <span class="prelude-val">None</span>, |
| ), |
| } |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>read_from_disk(<span class="kw-2">&mut </span><span class="self">self</span>, file: <span class="kw-2">&mut </span><span class="kw">dyn </span>HostFs) -> FsResult { |
| file.read(META_DATA_PHY_NUM, <span class="kw-2">&mut </span><span class="self">self</span>.node.metadata) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>write_to_disk(<span class="kw-2">&mut </span><span class="self">self</span>, file: <span class="kw-2">&mut </span><span class="kw">dyn </span>HostFs) -> FsResult { |
| file.write(META_DATA_PHY_NUM, <span class="kw-2">&</span><span class="self">self</span>.node.metadata) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>write_recovery_file(<span class="kw-2">&</span><span class="self">self</span>, file: <span class="kw-2">&mut </span><span class="kw">dyn </span>HostFs) -> FsResult { |
| file.write(META_DATA_PHY_NUM, <span class="kw-2">&</span><span class="self">self</span>.node) |
| } |
| } |
| |
| <span class="kw">impl </span>Drop <span class="kw">for </span>MetadataInfo { |
| <span class="kw">fn </span>drop(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="self">self</span>.encrypted_plain.as_mut().fill(<span class="number">0</span>) |
| } |
| } |
| </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> |
