1 // Copyright 2021, The Android Open Source Project
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 //! Routines for handling payload
16
17 use crate::instance::ApexData;
18 use crate::ioutil::wait_for_file;
19 use anyhow::{Context, Result};
20 use log::{info, warn};
21 use microdroid_metadata::{read_metadata, ApexPayload, Metadata};
22 use std::time::Duration;
23
24 const PAYLOAD_METADATA_PATH: &str = "/dev/block/by-name/payload-metadata";
25 const WAIT_TIMEOUT: Duration = Duration::from_secs(10);
26
27 /// Loads payload metadata from /dev/block/by-name/payload-metadata
load_metadata() -> Result<Metadata>28 pub fn load_metadata() -> Result<Metadata> {
29 info!("loading payload metadata...");
30 let file = wait_for_file(PAYLOAD_METADATA_PATH, WAIT_TIMEOUT)?;
31 read_metadata(file)
32 }
33
34 /// Loads (name, public_key, root_digest) from payload APEXes
get_apex_data_from_payload(metadata: &Metadata) -> Result<Vec<ApexData>>35 pub fn get_apex_data_from_payload(metadata: &Metadata) -> Result<Vec<ApexData>> {
36 metadata
37 .apexes
38 .iter()
39 .map(|apex| {
40 let apex_path = format!("/dev/block/by-name/{}", apex.partition_name);
41 let extracted =
42 apexutil::verify(&apex_path).context(format!("Failed to parse {}", &apex_path))?;
43 if let Some(manifest_name) = &extracted.name {
44 if &apex.name != manifest_name {
45 warn!("Apex named {} is named {} in its manifest", apex.name, manifest_name);
46 }
47 };
48 Ok(ApexData {
49 name: apex.name.clone(),
50 manifest_name: extracted.name,
51 manifest_version: extracted.version,
52 public_key: extracted.public_key,
53 root_digest: extracted.root_digest,
54 last_update_seconds: apex.last_update_seconds,
55 is_factory: apex.is_factory,
56 })
57 })
58 .collect()
59 }
60
61 /// Convert vector of ApexData into Metadata
to_metadata(apex_data: &[ApexData]) -> Metadata62 pub fn to_metadata(apex_data: &[ApexData]) -> Metadata {
63 Metadata {
64 apexes: apex_data
65 .iter()
66 .map(|data| ApexPayload {
67 name: data.name.clone(),
68 public_key: data.public_key.clone(),
69 root_digest: data.root_digest.clone(),
70 manifest_name: data.manifest_name.clone().unwrap_or_default(),
71 manifest_version: data.manifest_version.unwrap_or_default(),
72 last_update_seconds: data.last_update_seconds,
73 is_factory: data.is_factory,
74 ..Default::default()
75 })
76 .collect(),
77 ..Default::default()
78 }
79 }
80