66 lines
1.7 KiB
Rust
66 lines
1.7 KiB
Rust
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// SPDX-License-Identifier: MPL-2.0
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//! This module is used to compress kernel ELF.
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use std::{
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ffi::{OsStr, OsString},
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io::Write,
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str::FromStr,
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};
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use libflate::{gzip, zlib};
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use serde::{Deserialize, Serialize};
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#[derive(Debug, Default, Clone, PartialEq, Eq, Serialize, Deserialize)]
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pub enum PayloadEncoding {
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#[default]
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#[serde(rename = "raw")]
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Raw,
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#[serde(rename = "gzip")]
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Gzip,
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#[serde(rename = "zlib")]
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Zlib,
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}
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impl FromStr for PayloadEncoding {
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type Err = String;
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fn from_str(s: &str) -> Result<Self, Self::Err> {
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match s {
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"raw" => Ok(Self::Raw),
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"gzip" => Ok(Self::Gzip),
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"zlib" => Ok(Self::Zlib),
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_ => Err(format!("Invalid encoding format: {}", s)),
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}
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}
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}
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impl From<OsString> for PayloadEncoding {
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fn from(os_string: OsString) -> Self {
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PayloadEncoding::from_str(&os_string.to_string_lossy()).unwrap()
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}
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}
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impl From<&OsStr> for PayloadEncoding {
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fn from(os_str: &OsStr) -> Self {
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PayloadEncoding::from_str(&os_str.to_string_lossy()).unwrap()
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}
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}
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/// Encoding the kernel ELF using the provided format.
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pub fn encode_kernel(kernel: Vec<u8>, encoding: PayloadEncoding) -> Vec<u8> {
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match encoding {
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PayloadEncoding::Raw => kernel,
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PayloadEncoding::Gzip => {
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let mut encoder = gzip::Encoder::new(Vec::new()).unwrap();
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encoder.write_all(&kernel).unwrap();
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encoder.finish().into_result().unwrap()
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}
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PayloadEncoding::Zlib => {
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let mut encoder = zlib::Encoder::new(Vec::new()).unwrap();
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encoder.write_all(&kernel).unwrap();
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encoder.finish().into_result().unwrap()
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}
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}
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}
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