src/backup/data_blob.rs: move parts into single files
This commit is contained in:
Dietmar Maurer
parent
e27c5a559f
commit
018d11bb84
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@ -121,12 +121,30 @@ pub use crypt_config::*;
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mod key_derivation;
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pub use key_derivation::*;
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mod crypt_reader;
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pub use crypt_reader::*;
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mod crypt_writer;
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pub use crypt_writer::*;
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mod checksum_reader;
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pub use checksum_reader::*;
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mod checksum_writer;
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pub use checksum_writer::*;
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mod data_chunk;
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pub use data_chunk::*;
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mod data_blob;
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pub use data_blob::*;
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mod data_blob_reader;
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pub use data_blob_reader::*;
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mod data_blob_writer;
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pub use data_blob_writer::*;
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mod chunk_stream;
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pub use chunk_stream::*;
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@ -0,0 +1,47 @@
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use failure::*;
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use std::io::Read;
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pub struct ChecksumReader<'a, R> {
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reader: R,
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hasher: crc32fast::Hasher,
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signer: Option<openssl::sign::Signer<'a>>,
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}
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impl <'a, R: Read> ChecksumReader<'a, R> {
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pub fn new(reader: R, signer: Option<openssl::sign::Signer<'a>>) -> Self {
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let hasher = crc32fast::Hasher::new();
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Self { reader, hasher, signer }
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}
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pub fn finish(mut self) -> Result<(R, u32, Option<[u8; 32]>), Error> {
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let crc = self.hasher.finalize();
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if let Some(ref mut signer) = self.signer {
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let mut tag = [0u8; 32];
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signer.sign(&mut tag)?;
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Ok((self.reader, crc, Some(tag)))
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} else {
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Ok((self.reader, crc, None))
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}
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}
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}
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impl <'a, R: Read> Read for ChecksumReader<'a, R> {
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fn read(&mut self, buf: &mut [u8]) -> Result<usize, std::io::Error> {
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let count = self.reader.read(buf)?;
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if count > 0 {
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self.hasher.update(&buf[..count]);
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if let Some(ref mut signer) = self.signer {
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signer.update(&buf[..count])
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.map_err(|err| {
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std::io::Error::new(
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std::io::ErrorKind::Other,
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format!("hmac update failed - {}", err))
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})?;
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}
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}
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Ok(count)
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}
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}
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@ -0,0 +1,48 @@
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use failure::*;
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use std::io::Write;
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pub struct ChecksumWriter<'a, W> {
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writer: W,
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hasher: crc32fast::Hasher,
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signer: Option<openssl::sign::Signer<'a>>,
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}
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impl <'a, W: Write> ChecksumWriter<'a, W> {
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pub fn new(writer: W, signer: Option<openssl::sign::Signer<'a>>) -> Self {
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let hasher = crc32fast::Hasher::new();
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Self { writer, hasher, signer }
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}
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pub fn finish(mut self) -> Result<(W, u32, Option<[u8; 32]>), Error> {
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let crc = self.hasher.finalize();
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if let Some(ref mut signer) = self.signer {
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let mut tag = [0u8; 32];
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signer.sign(&mut tag)?;
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Ok((self.writer, crc, Some(tag)))
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} else {
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Ok((self.writer, crc, None))
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}
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}
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}
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impl <'a, W: Write> Write for ChecksumWriter<'a, W> {
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fn write(&mut self, buf: &[u8]) -> Result<usize, std::io::Error> {
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self.hasher.update(buf);
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if let Some(ref mut signer) = self.signer {
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signer.update(buf)
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.map_err(|err| {
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std::io::Error::new(
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std::io::ErrorKind::Other,
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format!("hmac update failed - {}", err))
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})?;
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}
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self.writer.write(buf)
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}
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fn flush(&mut self) -> Result<(), std::io::Error> {
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self.writer.flush()
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}
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}
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@ -0,0 +1,90 @@
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use failure::*;
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use std::io::{Read, BufRead};
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use super::CryptConfig;
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pub struct CryptReader<R> {
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reader: R,
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small_read_buf: Vec<u8>,
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block_size: usize,
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crypter: openssl::symm::Crypter,
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finalized: bool,
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}
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impl <R: BufRead> CryptReader<R> {
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pub fn new(reader: R, iv: [u8; 16], tag: [u8; 16], config: &CryptConfig) -> Result<Self, Error> {
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let block_size = config.cipher().block_size(); // Note: block size is normally 1 byte for stream ciphers
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if block_size.count_ones() != 1 || block_size > 512 {
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bail!("unexpected Cipher block size {}", block_size);
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}
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let mut crypter = config.data_crypter(&iv, openssl::symm::Mode::Decrypt)?;
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crypter.set_tag(&tag)?;
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Ok(Self { reader, crypter, block_size, finalized: false, small_read_buf: Vec::new() })
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}
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pub fn finish(self) -> Result<R, Error> {
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if !self.finalized {
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bail!("CryptReader not successfully finalized.");
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}
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Ok(self.reader)
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}
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}
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impl <R: BufRead> Read for CryptReader<R> {
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fn read(&mut self, buf: &mut [u8]) -> Result<usize, std::io::Error> {
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if self.small_read_buf.len() > 0 {
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let max = if self.small_read_buf.len() > buf.len() { buf.len() } else { self.small_read_buf.len() };
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let rest = self.small_read_buf.split_off(max);
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buf[..max].copy_from_slice(&self.small_read_buf);
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self.small_read_buf = rest;
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return Ok(max);
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}
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let data = self.reader.fill_buf()?;
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// handle small read buffers
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if buf.len() <= 2*self.block_size {
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let mut outbuf = [0u8; 1024];
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let count = if data.len() == 0 { // EOF
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let written = self.crypter.finalize(&mut outbuf)?;
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self.finalized = true;
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written
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} else {
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let mut read_size = outbuf.len() - self.block_size;
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if read_size > data.len() {
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read_size = data.len();
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}
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let written = self.crypter.update(&data[..read_size], &mut outbuf)?;
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self.reader.consume(read_size);
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written
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};
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if count > buf.len() {
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buf.copy_from_slice(&outbuf[..buf.len()]);
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self.small_read_buf = outbuf[buf.len()..count].to_vec();
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return Ok(buf.len());
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} else {
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buf[..count].copy_from_slice(&outbuf[..count]);
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return Ok(count);
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}
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} else {
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if data.len() == 0 { // EOF
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let rest = self.crypter.finalize(buf)?;
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self.finalized = true;
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return Ok(rest)
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} else {
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let mut read_size = buf.len() - self.block_size;
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if read_size > data.len() {
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read_size = data.len();
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}
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let count = self.crypter.update(&data[..read_size], buf)?;
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self.reader.consume(read_size);
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return Ok(count)
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}
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}
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}
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}
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@ -0,0 +1,63 @@
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use failure::*;
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use std::io::Write;
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use super::CryptConfig;
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pub struct CryptWriter<W> {
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writer: W,
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block_size: usize,
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encr_buf: Box<[u8; 64*1024]>,
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iv: [u8; 16],
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crypter: openssl::symm::Crypter,
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}
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impl <W: Write> CryptWriter<W> {
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pub fn new(writer: W, config: &CryptConfig) -> Result<Self, Error> {
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let mut iv = [0u8; 16];
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proxmox::sys::linux::fill_with_random_data(&mut iv)?;
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let block_size = config.cipher().block_size();
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let crypter = config.data_crypter(&iv, openssl::symm::Mode::Encrypt)?;
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Ok(Self { writer, iv, crypter, block_size, encr_buf: Box::new([0u8; 64*1024]) })
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}
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pub fn finish(mut self) -> Result<(W, [u8; 16], [u8; 16]), Error> {
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let rest = self.crypter.finalize(self.encr_buf.as_mut())?;
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if rest > 0 {
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self.writer.write_all(&self.encr_buf[..rest])?;
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}
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self.writer.flush()?;
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let mut tag = [0u8; 16];
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self.crypter.get_tag(&mut tag)?;
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Ok((self.writer, self.iv, tag))
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}
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}
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impl <W: Write> Write for CryptWriter<W> {
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fn write(&mut self, buf: &[u8]) -> Result<usize, std::io::Error> {
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let mut write_size = buf.len();
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if write_size > (self.encr_buf.len() - self.block_size) {
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write_size = self.encr_buf.len() - self.block_size;
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}
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let count = self.crypter.update(&buf[..write_size], self.encr_buf.as_mut())
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.map_err(|err| {
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std::io::Error::new(
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std::io::ErrorKind::Other,
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format!("crypter update failed - {}", err))
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})?;
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self.writer.write_all(&self.encr_buf[..count])?;
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Ok(write_size)
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}
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fn flush(&mut self) -> Result<(), std::io::Error> {
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Ok(())
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}
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}
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@ -7,7 +7,6 @@ const MAX_BLOB_SIZE: usize = 128*1024*1024;
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use super::*;
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/// Data blob binary storage format
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///
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/// Data blobs store arbitrary binary data (< 128MB), and can be
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@ -288,646 +287,4 @@ impl DataBlob {
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bail!("unable to parse raw blob - wrong magic");
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}
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}
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}
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use std::io::{Read, BufRead, BufReader, Write, Seek, SeekFrom};
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struct CryptReader<R> {
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reader: R,
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small_read_buf: Vec<u8>,
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block_size: usize,
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crypter: openssl::symm::Crypter,
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finalized: bool,
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}
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impl <R: BufRead> CryptReader<R> {
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fn new(reader: R, iv: [u8; 16], tag: [u8; 16], config: &CryptConfig) -> Result<Self, Error> {
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let block_size = config.cipher().block_size(); // Note: block size is normally 1 byte for stream ciphers
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if block_size.count_ones() != 1 || block_size > 512 {
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bail!("unexpected Cipher block size {}", block_size);
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}
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let mut crypter = config.data_crypter(&iv, openssl::symm::Mode::Decrypt)?;
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crypter.set_tag(&tag)?;
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Ok(Self { reader, crypter, block_size, finalized: false, small_read_buf: Vec::new() })
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}
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fn finish(self) -> Result<R, Error> {
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if !self.finalized {
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bail!("CryptReader not successfully finalized.");
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}
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Ok(self.reader)
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}
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}
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impl <R: BufRead> Read for CryptReader<R> {
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fn read(&mut self, buf: &mut [u8]) -> Result<usize, std::io::Error> {
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if self.small_read_buf.len() > 0 {
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let max = if self.small_read_buf.len() > buf.len() { buf.len() } else { self.small_read_buf.len() };
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let rest = self.small_read_buf.split_off(max);
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buf[..max].copy_from_slice(&self.small_read_buf);
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self.small_read_buf = rest;
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return Ok(max);
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}
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let data = self.reader.fill_buf()?;
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// handle small read buffers
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if buf.len() <= 2*self.block_size {
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let mut outbuf = [0u8; 1024];
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let count = if data.len() == 0 { // EOF
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let written = self.crypter.finalize(&mut outbuf)?;
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self.finalized = true;
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written
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} else {
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let mut read_size = outbuf.len() - self.block_size;
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if read_size > data.len() {
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read_size = data.len();
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}
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let written = self.crypter.update(&data[..read_size], &mut outbuf)?;
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self.reader.consume(read_size);
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written
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};
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if count > buf.len() {
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buf.copy_from_slice(&outbuf[..buf.len()]);
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self.small_read_buf = outbuf[buf.len()..count].to_vec();
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return Ok(buf.len());
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} else {
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buf[..count].copy_from_slice(&outbuf[..count]);
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return Ok(count);
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}
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} else {
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if data.len() == 0 { // EOF
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let rest = self.crypter.finalize(buf)?;
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self.finalized = true;
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return Ok(rest)
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} else {
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let mut read_size = buf.len() - self.block_size;
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if read_size > data.len() {
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read_size = data.len();
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}
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let count = self.crypter.update(&data[..read_size], buf)?;
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self.reader.consume(read_size);
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return Ok(count)
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}
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}
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}
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}
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struct CryptWriter<W> {
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writer: W,
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block_size: usize,
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encr_buf: Box<[u8; 64*1024]>,
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iv: [u8; 16],
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crypter: openssl::symm::Crypter,
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}
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impl <W: Write> CryptWriter<W> {
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fn new(writer: W, config: &CryptConfig) -> Result<Self, Error> {
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let mut iv = [0u8; 16];
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proxmox::sys::linux::fill_with_random_data(&mut iv)?;
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let block_size = config.cipher().block_size();
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let crypter = config.data_crypter(&iv, openssl::symm::Mode::Encrypt)?;
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Ok(Self { writer, iv, crypter, block_size, encr_buf: Box::new([0u8; 64*1024]) })
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}
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fn finish(mut self) -> Result<(W, [u8; 16], [u8; 16]), Error> {
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let rest = self.crypter.finalize(self.encr_buf.as_mut())?;
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if rest > 0 {
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self.writer.write_all(&self.encr_buf[..rest])?;
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}
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self.writer.flush()?;
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let mut tag = [0u8; 16];
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self.crypter.get_tag(&mut tag)?;
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Ok((self.writer, self.iv, tag))
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}
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}
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impl <W: Write> Write for CryptWriter<W> {
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fn write(&mut self, buf: &[u8]) -> Result<usize, std::io::Error> {
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let mut write_size = buf.len();
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if write_size > (self.encr_buf.len() - self.block_size) {
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write_size = self.encr_buf.len() - self.block_size;
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}
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let count = self.crypter.update(&buf[..write_size], self.encr_buf.as_mut())
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.map_err(|err| {
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std::io::Error::new(
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std::io::ErrorKind::Other,
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format!("crypter update failed - {}", err))
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})?;
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self.writer.write_all(&self.encr_buf[..count])?;
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Ok(write_size)
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}
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fn flush(&mut self) -> Result<(), std::io::Error> {
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Ok(())
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}
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}
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struct ChecksumWriter<'a, W> {
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writer: W,
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hasher: crc32fast::Hasher,
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signer: Option<openssl::sign::Signer<'a>>,
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}
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impl <'a, W: Write> ChecksumWriter<'a, W> {
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fn new(writer: W, signer: Option<openssl::sign::Signer<'a>>) -> Self {
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let hasher = crc32fast::Hasher::new();
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Self { writer, hasher, signer }
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}
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pub fn finish(mut self) -> Result<(W, u32, Option<[u8; 32]>), Error> {
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let crc = self.hasher.finalize();
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if let Some(ref mut signer) = self.signer {
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let mut tag = [0u8; 32];
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signer.sign(&mut tag)?;
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Ok((self.writer, crc, Some(tag)))
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} else {
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Ok((self.writer, crc, None))
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}
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}
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}
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impl <'a, W: Write> Write for ChecksumWriter<'a, W> {
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|
||||
fn write(&mut self, buf: &[u8]) -> Result<usize, std::io::Error> {
|
||||
self.hasher.update(buf);
|
||||
if let Some(ref mut signer) = self.signer {
|
||||
signer.update(buf)
|
||||
.map_err(|err| {
|
||||
std::io::Error::new(
|
||||
std::io::ErrorKind::Other,
|
||||
format!("hmac update failed - {}", err))
|
||||
})?;
|
||||
}
|
||||
self.writer.write(buf)
|
||||
}
|
||||
|
||||
fn flush(&mut self) -> Result<(), std::io::Error> {
|
||||
self.writer.flush()
|
||||
}
|
||||
}
|
||||
|
||||
enum BlobWriterState<'a, W: Write> {
|
||||
Uncompressed { csum_writer: ChecksumWriter<'a, W> },
|
||||
Compressed { compr: zstd::stream::write::Encoder<ChecksumWriter<'a, W>> },
|
||||
Signed { csum_writer: ChecksumWriter<'a, W> },
|
||||
SignedCompressed { compr: zstd::stream::write::Encoder<ChecksumWriter<'a, W>> },
|
||||
Encrypted { crypt_writer: CryptWriter<ChecksumWriter<'a, W>> },
|
||||
EncryptedCompressed { compr: zstd::stream::write::Encoder<CryptWriter<ChecksumWriter<'a, W>>> },
|
||||
}
|
||||
|
||||
/// Write compressed data blobs
|
||||
pub struct DataBlobWriter<'a, W: Write> {
|
||||
state: BlobWriterState<'a, W>,
|
||||
}
|
||||
|
||||
impl <'a, W: Write + Seek> DataBlobWriter<'a, W> {
|
||||
|
||||
pub fn new_uncompressed(mut writer: W) -> Result<Self, Error> {
|
||||
writer.seek(SeekFrom::Start(0))?;
|
||||
let head = DataBlobHeader { magic: UNCOMPRESSED_BLOB_MAGIC_1_0, crc: [0; 4] };
|
||||
unsafe {
|
||||
writer.write_le_value(head)?;
|
||||
}
|
||||
let csum_writer = ChecksumWriter::new(writer, None);
|
||||
Ok(Self { state: BlobWriterState::Uncompressed { csum_writer }})
|
||||
}
|
||||
|
||||
pub fn new_compressed(mut writer: W) -> Result<Self, Error> {
|
||||
writer.seek(SeekFrom::Start(0))?;
|
||||
let head = DataBlobHeader { magic: COMPRESSED_BLOB_MAGIC_1_0, crc: [0; 4] };
|
||||
unsafe {
|
||||
writer.write_le_value(head)?;
|
||||
}
|
||||
let csum_writer = ChecksumWriter::new(writer, None);
|
||||
let compr = zstd::stream::write::Encoder::new(csum_writer, 1)?;
|
||||
Ok(Self { state: BlobWriterState::Compressed { compr }})
|
||||
}
|
||||
|
||||
pub fn new_signed(mut writer: W, config: &'a CryptConfig) -> Result<Self, Error> {
|
||||
writer.seek(SeekFrom::Start(0))?;
|
||||
let head = AuthenticatedDataBlobHeader {
|
||||
head: DataBlobHeader { magic: AUTHENTICATED_BLOB_MAGIC_1_0, crc: [0; 4] },
|
||||
tag: [0u8; 32],
|
||||
};
|
||||
unsafe {
|
||||
writer.write_le_value(head)?;
|
||||
}
|
||||
let signer = config.data_signer();
|
||||
let csum_writer = ChecksumWriter::new(writer, Some(signer));
|
||||
Ok(Self { state: BlobWriterState::Signed { csum_writer }})
|
||||
}
|
||||
|
||||
pub fn new_signed_compressed(mut writer: W, config: &'a CryptConfig) -> Result<Self, Error> {
|
||||
writer.seek(SeekFrom::Start(0))?;
|
||||
let head = AuthenticatedDataBlobHeader {
|
||||
head: DataBlobHeader { magic: AUTH_COMPR_BLOB_MAGIC_1_0, crc: [0; 4] },
|
||||
tag: [0u8; 32],
|
||||
};
|
||||
unsafe {
|
||||
writer.write_le_value(head)?;
|
||||
}
|
||||
let signer = config.data_signer();
|
||||
let csum_writer = ChecksumWriter::new(writer, Some(signer));
|
||||
let compr = zstd::stream::write::Encoder::new(csum_writer, 1)?;
|
||||
Ok(Self { state: BlobWriterState::SignedCompressed { compr }})
|
||||
}
|
||||
|
||||
pub fn new_encrypted(mut writer: W, config: &'a CryptConfig) -> Result<Self, Error> {
|
||||
writer.seek(SeekFrom::Start(0))?;
|
||||
let head = EncryptedDataBlobHeader {
|
||||
head: DataBlobHeader { magic: ENCRYPTED_BLOB_MAGIC_1_0, crc: [0; 4] },
|
||||
iv: [0u8; 16],
|
||||
tag: [0u8; 16],
|
||||
};
|
||||
unsafe {
|
||||
writer.write_le_value(head)?;
|
||||
}
|
||||
|
||||
let csum_writer = ChecksumWriter::new(writer, None);
|
||||
let crypt_writer = CryptWriter::new(csum_writer, config)?;
|
||||
Ok(Self { state: BlobWriterState::Encrypted { crypt_writer }})
|
||||
}
|
||||
|
||||
pub fn new_encrypted_compressed(mut writer: W, config: &'a CryptConfig) -> Result<Self, Error> {
|
||||
writer.seek(SeekFrom::Start(0))?;
|
||||
let head = EncryptedDataBlobHeader {
|
||||
head: DataBlobHeader { magic: ENCR_COMPR_BLOB_MAGIC_1_0, crc: [0; 4] },
|
||||
iv: [0u8; 16],
|
||||
tag: [0u8; 16],
|
||||
};
|
||||
unsafe {
|
||||
writer.write_le_value(head)?;
|
||||
}
|
||||
|
||||
let csum_writer = ChecksumWriter::new(writer, None);
|
||||
let crypt_writer = CryptWriter::new(csum_writer, config)?;
|
||||
let compr = zstd::stream::write::Encoder::new(crypt_writer, 1)?;
|
||||
Ok(Self { state: BlobWriterState::EncryptedCompressed { compr }})
|
||||
}
|
||||
|
||||
pub fn finish(self) -> Result<W, Error> {
|
||||
match self.state {
|
||||
BlobWriterState::Uncompressed { csum_writer } => {
|
||||
// write CRC
|
||||
let (mut writer, crc, _) = csum_writer.finish()?;
|
||||
let head = DataBlobHeader { magic: UNCOMPRESSED_BLOB_MAGIC_1_0, crc: crc.to_le_bytes() };
|
||||
|
||||
writer.seek(SeekFrom::Start(0))?;
|
||||
unsafe {
|
||||
writer.write_le_value(head)?;
|
||||
}
|
||||
|
||||
return Ok(writer)
|
||||
}
|
||||
BlobWriterState::Compressed { compr } => {
|
||||
let csum_writer = compr.finish()?;
|
||||
let (mut writer, crc, _) = csum_writer.finish()?;
|
||||
|
||||
let head = DataBlobHeader { magic: COMPRESSED_BLOB_MAGIC_1_0, crc: crc.to_le_bytes() };
|
||||
|
||||
writer.seek(SeekFrom::Start(0))?;
|
||||
unsafe {
|
||||
writer.write_le_value(head)?;
|
||||
}
|
||||
|
||||
return Ok(writer)
|
||||
}
|
||||
BlobWriterState::Signed { csum_writer } => {
|
||||
let (mut writer, crc, tag) = csum_writer.finish()?;
|
||||
|
||||
let head = AuthenticatedDataBlobHeader {
|
||||
head: DataBlobHeader { magic: AUTHENTICATED_BLOB_MAGIC_1_0, crc: crc.to_le_bytes() },
|
||||
tag: tag.unwrap(),
|
||||
};
|
||||
|
||||
writer.seek(SeekFrom::Start(0))?;
|
||||
unsafe {
|
||||
writer.write_le_value(head)?;
|
||||
}
|
||||
|
||||
return Ok(writer)
|
||||
}
|
||||
BlobWriterState::SignedCompressed { compr } => {
|
||||
let csum_writer = compr.finish()?;
|
||||
let (mut writer, crc, tag) = csum_writer.finish()?;
|
||||
|
||||
let head = AuthenticatedDataBlobHeader {
|
||||
head: DataBlobHeader { magic: AUTH_COMPR_BLOB_MAGIC_1_0, crc: crc.to_le_bytes() },
|
||||
tag: tag.unwrap(),
|
||||
};
|
||||
|
||||
writer.seek(SeekFrom::Start(0))?;
|
||||
unsafe {
|
||||
writer.write_le_value(head)?;
|
||||
}
|
||||
|
||||
return Ok(writer)
|
||||
}
|
||||
BlobWriterState::Encrypted { crypt_writer } => {
|
||||
let (csum_writer, iv, tag) = crypt_writer.finish()?;
|
||||
let (mut writer, crc, _) = csum_writer.finish()?;
|
||||
|
||||
let head = EncryptedDataBlobHeader {
|
||||
head: DataBlobHeader { magic: ENCRYPTED_BLOB_MAGIC_1_0, crc: crc.to_le_bytes() },
|
||||
iv, tag,
|
||||
};
|
||||
writer.seek(SeekFrom::Start(0))?;
|
||||
unsafe {
|
||||
writer.write_le_value(head)?;
|
||||
}
|
||||
return Ok(writer)
|
||||
}
|
||||
BlobWriterState::EncryptedCompressed { compr } => {
|
||||
let crypt_writer = compr.finish()?;
|
||||
let (csum_writer, iv, tag) = crypt_writer.finish()?;
|
||||
let (mut writer, crc, _) = csum_writer.finish()?;
|
||||
|
||||
let head = EncryptedDataBlobHeader {
|
||||
head: DataBlobHeader { magic: ENCR_COMPR_BLOB_MAGIC_1_0, crc: crc.to_le_bytes() },
|
||||
iv, tag,
|
||||
};
|
||||
writer.seek(SeekFrom::Start(0))?;
|
||||
unsafe {
|
||||
writer.write_le_value(head)?;
|
||||
}
|
||||
return Ok(writer)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl <'a, W: Write + Seek> Write for DataBlobWriter<'a, W> {
|
||||
|
||||
fn write(&mut self, buf: &[u8]) -> Result<usize, std::io::Error> {
|
||||
match self.state {
|
||||
BlobWriterState::Uncompressed { ref mut csum_writer } => {
|
||||
csum_writer.write(buf)
|
||||
}
|
||||
BlobWriterState::Compressed { ref mut compr } => {
|
||||
compr.write(buf)
|
||||
}
|
||||
BlobWriterState::Signed { ref mut csum_writer } => {
|
||||
csum_writer.write(buf)
|
||||
}
|
||||
BlobWriterState::SignedCompressed { ref mut compr } => {
|
||||
compr.write(buf)
|
||||
}
|
||||
BlobWriterState::Encrypted { ref mut crypt_writer } => {
|
||||
crypt_writer.write(buf)
|
||||
}
|
||||
BlobWriterState::EncryptedCompressed { ref mut compr } => {
|
||||
compr.write(buf)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn flush(&mut self) -> Result<(), std::io::Error> {
|
||||
match self.state {
|
||||
BlobWriterState::Uncompressed { ref mut csum_writer } => {
|
||||
csum_writer.flush()
|
||||
}
|
||||
BlobWriterState::Compressed { ref mut compr } => {
|
||||
compr.flush()
|
||||
}
|
||||
BlobWriterState::Signed { ref mut csum_writer } => {
|
||||
csum_writer.flush()
|
||||
}
|
||||
BlobWriterState::SignedCompressed { ref mut compr } => {
|
||||
compr.flush()
|
||||
}
|
||||
BlobWriterState::Encrypted { ref mut crypt_writer } => {
|
||||
crypt_writer.flush()
|
||||
}
|
||||
BlobWriterState::EncryptedCompressed { ref mut compr } => {
|
||||
compr.flush()
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
struct ChecksumReader<'a, R> {
|
||||
reader: R,
|
||||
hasher: crc32fast::Hasher,
|
||||
signer: Option<openssl::sign::Signer<'a>>,
|
||||
}
|
||||
|
||||
impl <'a, R: Read> ChecksumReader<'a, R> {
|
||||
|
||||
fn new(reader: R, signer: Option<openssl::sign::Signer<'a>>) -> Self {
|
||||
let hasher = crc32fast::Hasher::new();
|
||||
Self { reader, hasher, signer }
|
||||
}
|
||||
|
||||
pub fn finish(mut self) -> Result<(R, u32, Option<[u8; 32]>), Error> {
|
||||
let crc = self.hasher.finalize();
|
||||
|
||||
if let Some(ref mut signer) = self.signer {
|
||||
let mut tag = [0u8; 32];
|
||||
signer.sign(&mut tag)?;
|
||||
Ok((self.reader, crc, Some(tag)))
|
||||
} else {
|
||||
Ok((self.reader, crc, None))
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl <'a, R: Read> Read for ChecksumReader<'a, R> {
|
||||
|
||||
fn read(&mut self, buf: &mut [u8]) -> Result<usize, std::io::Error> {
|
||||
let count = self.reader.read(buf)?;
|
||||
if count > 0 {
|
||||
self.hasher.update(&buf[..count]);
|
||||
if let Some(ref mut signer) = self.signer {
|
||||
signer.update(&buf[..count])
|
||||
.map_err(|err| {
|
||||
std::io::Error::new(
|
||||
std::io::ErrorKind::Other,
|
||||
format!("hmac update failed - {}", err))
|
||||
})?;
|
||||
}
|
||||
}
|
||||
Ok(count)
|
||||
}
|
||||
}
|
||||
|
||||
enum BlobReaderState<'a, R: Read> {
|
||||
Uncompressed { expected_crc: u32, csum_reader: ChecksumReader<'a, R> },
|
||||
Compressed { expected_crc: u32, decompr: zstd::stream::read::Decoder<BufReader<ChecksumReader<'a, R>>> },
|
||||
Signed { expected_crc: u32, expected_hmac: [u8; 32], csum_reader: ChecksumReader<'a, R> },
|
||||
SignedCompressed { expected_crc: u32, expected_hmac: [u8; 32], decompr: zstd::stream::read::Decoder<BufReader<ChecksumReader<'a, R>>> },
|
||||
Encrypted { expected_crc: u32, decrypt_reader: CryptReader<BufReader<ChecksumReader<'a, R>>> },
|
||||
EncryptedCompressed { expected_crc: u32, decompr: zstd::stream::read::Decoder<BufReader<CryptReader<BufReader<ChecksumReader<'a, R>>>>> },
|
||||
}
|
||||
|
||||
/// Read data blobs
|
||||
pub struct DataBlobReader<'a, R: Read> {
|
||||
state: BlobReaderState<'a, R>,
|
||||
}
|
||||
|
||||
impl <'a, R: Read> DataBlobReader<'a, R> {
|
||||
|
||||
pub fn new(mut reader: R, config: Option<&'a CryptConfig>) -> Result<Self, Error> {
|
||||
|
||||
let head: DataBlobHeader = unsafe { reader.read_le_value()? };
|
||||
match head.magic {
|
||||
UNCOMPRESSED_BLOB_MAGIC_1_0 => {
|
||||
let expected_crc = u32::from_le_bytes(head.crc);
|
||||
let csum_reader = ChecksumReader::new(reader, None);
|
||||
Ok(Self { state: BlobReaderState::Uncompressed { expected_crc, csum_reader }})
|
||||
}
|
||||
COMPRESSED_BLOB_MAGIC_1_0 => {
|
||||
let expected_crc = u32::from_le_bytes(head.crc);
|
||||
let csum_reader = ChecksumReader::new(reader, None);
|
||||
|
||||
let decompr = zstd::stream::read::Decoder::new(csum_reader)?;
|
||||
Ok(Self { state: BlobReaderState::Compressed { expected_crc, decompr }})
|
||||
}
|
||||
AUTHENTICATED_BLOB_MAGIC_1_0 => {
|
||||
let expected_crc = u32::from_le_bytes(head.crc);
|
||||
let mut expected_hmac = [0u8; 32];
|
||||
reader.read_exact(&mut expected_hmac)?;
|
||||
let signer = config.map(|c| c.data_signer());
|
||||
let csum_reader = ChecksumReader::new(reader, signer);
|
||||
Ok(Self { state: BlobReaderState::Signed { expected_crc, expected_hmac, csum_reader }})
|
||||
}
|
||||
AUTH_COMPR_BLOB_MAGIC_1_0 => {
|
||||
let expected_crc = u32::from_le_bytes(head.crc);
|
||||
let mut expected_hmac = [0u8; 32];
|
||||
reader.read_exact(&mut expected_hmac)?;
|
||||
let signer = config.map(|c| c.data_signer());
|
||||
let csum_reader = ChecksumReader::new(reader, signer);
|
||||
|
||||
let decompr = zstd::stream::read::Decoder::new(csum_reader)?;
|
||||
Ok(Self { state: BlobReaderState::SignedCompressed { expected_crc, expected_hmac, decompr }})
|
||||
}
|
||||
ENCRYPTED_BLOB_MAGIC_1_0 => {
|
||||
let expected_crc = u32::from_le_bytes(head.crc);
|
||||
let mut iv = [0u8; 16];
|
||||
let mut expected_tag = [0u8; 16];
|
||||
reader.read_exact(&mut iv)?;
|
||||
reader.read_exact(&mut expected_tag)?;
|
||||
let csum_reader = ChecksumReader::new(reader, None);
|
||||
let decrypt_reader = CryptReader::new(BufReader::with_capacity(64*1024, csum_reader), iv, expected_tag, config.unwrap())?;
|
||||
Ok(Self { state: BlobReaderState::Encrypted { expected_crc, decrypt_reader }})
|
||||
}
|
||||
ENCR_COMPR_BLOB_MAGIC_1_0 => {
|
||||
let expected_crc = u32::from_le_bytes(head.crc);
|
||||
let mut iv = [0u8; 16];
|
||||
let mut expected_tag = [0u8; 16];
|
||||
reader.read_exact(&mut iv)?;
|
||||
reader.read_exact(&mut expected_tag)?;
|
||||
let csum_reader = ChecksumReader::new(reader, None);
|
||||
let decrypt_reader = CryptReader::new(BufReader::with_capacity(64*1024, csum_reader), iv, expected_tag, config.unwrap())?;
|
||||
let decompr = zstd::stream::read::Decoder::new(decrypt_reader)?;
|
||||
Ok(Self { state: BlobReaderState::EncryptedCompressed { expected_crc, decompr }})
|
||||
}
|
||||
_ => bail!("got wrong magic number {:?}", head.magic)
|
||||
}
|
||||
}
|
||||
|
||||
pub fn finish(self) -> Result<R, Error> {
|
||||
match self.state {
|
||||
BlobReaderState::Uncompressed { csum_reader, expected_crc } => {
|
||||
let (reader, crc, _) = csum_reader.finish()?;
|
||||
if crc != expected_crc {
|
||||
bail!("blob crc check failed");
|
||||
}
|
||||
Ok(reader)
|
||||
}
|
||||
BlobReaderState::Compressed { expected_crc, decompr } => {
|
||||
let csum_reader = decompr.finish().into_inner();
|
||||
let (reader, crc, _) = csum_reader.finish()?;
|
||||
if crc != expected_crc {
|
||||
bail!("blob crc check failed");
|
||||
}
|
||||
Ok(reader)
|
||||
}
|
||||
BlobReaderState::Signed { csum_reader, expected_crc, expected_hmac } => {
|
||||
let (reader, crc, hmac) = csum_reader.finish()?;
|
||||
if crc != expected_crc {
|
||||
bail!("blob crc check failed");
|
||||
}
|
||||
if let Some(hmac) = hmac {
|
||||
if hmac != expected_hmac {
|
||||
bail!("blob signature check failed");
|
||||
}
|
||||
}
|
||||
Ok(reader)
|
||||
}
|
||||
BlobReaderState::SignedCompressed { expected_crc, expected_hmac, decompr } => {
|
||||
let csum_reader = decompr.finish().into_inner();
|
||||
let (reader, crc, hmac) = csum_reader.finish()?;
|
||||
if crc != expected_crc {
|
||||
bail!("blob crc check failed");
|
||||
}
|
||||
if let Some(hmac) = hmac {
|
||||
if hmac != expected_hmac {
|
||||
bail!("blob signature check failed");
|
||||
}
|
||||
}
|
||||
Ok(reader)
|
||||
}
|
||||
BlobReaderState::Encrypted { expected_crc, decrypt_reader } => {
|
||||
let csum_reader = decrypt_reader.finish()?.into_inner();
|
||||
let (reader, crc, _) = csum_reader.finish()?;
|
||||
if crc != expected_crc {
|
||||
bail!("blob crc check failed");
|
||||
}
|
||||
Ok(reader)
|
||||
}
|
||||
BlobReaderState::EncryptedCompressed { expected_crc, decompr } => {
|
||||
let decrypt_reader = decompr.finish().into_inner();
|
||||
let csum_reader = decrypt_reader.finish()?.into_inner();
|
||||
let (reader, crc, _) = csum_reader.finish()?;
|
||||
if crc != expected_crc {
|
||||
bail!("blob crc check failed");
|
||||
}
|
||||
Ok(reader)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl <'a, R: BufRead> Read for DataBlobReader<'a, R> {
|
||||
|
||||
fn read(&mut self, buf: &mut [u8]) -> Result<usize, std::io::Error> {
|
||||
match &mut self.state {
|
||||
BlobReaderState::Uncompressed { csum_reader, .. } => {
|
||||
csum_reader.read(buf)
|
||||
}
|
||||
BlobReaderState::Compressed { decompr, .. } => {
|
||||
decompr.read(buf)
|
||||
}
|
||||
BlobReaderState::Signed { csum_reader, .. } => {
|
||||
csum_reader.read(buf)
|
||||
}
|
||||
BlobReaderState::SignedCompressed { decompr, .. } => {
|
||||
decompr.read(buf)
|
||||
}
|
||||
BlobReaderState::Encrypted { decrypt_reader, .. } => {
|
||||
decrypt_reader.read(buf)
|
||||
}
|
||||
BlobReaderState::EncryptedCompressed { decompr, .. } => {
|
||||
decompr.read(buf)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -0,0 +1,169 @@
|
|||
use failure::*;
|
||||
use std::io::{Read, BufRead, BufReader};
|
||||
use proxmox::tools::io::ReadExt;
|
||||
|
||||
use super::*;
|
||||
|
||||
enum BlobReaderState<'a, R: Read> {
|
||||
Uncompressed { expected_crc: u32, csum_reader: ChecksumReader<'a, R> },
|
||||
Compressed { expected_crc: u32, decompr: zstd::stream::read::Decoder<BufReader<ChecksumReader<'a, R>>> },
|
||||
Signed { expected_crc: u32, expected_hmac: [u8; 32], csum_reader: ChecksumReader<'a, R> },
|
||||
SignedCompressed { expected_crc: u32, expected_hmac: [u8; 32], decompr: zstd::stream::read::Decoder<BufReader<ChecksumReader<'a, R>>> },
|
||||
Encrypted { expected_crc: u32, decrypt_reader: CryptReader<BufReader<ChecksumReader<'a, R>>> },
|
||||
EncryptedCompressed { expected_crc: u32, decompr: zstd::stream::read::Decoder<BufReader<CryptReader<BufReader<ChecksumReader<'a, R>>>>> },
|
||||
}
|
||||
|
||||
/// Read data blobs
|
||||
pub struct DataBlobReader<'a, R: Read> {
|
||||
state: BlobReaderState<'a, R>,
|
||||
}
|
||||
|
||||
impl <'a, R: Read> DataBlobReader<'a, R> {
|
||||
|
||||
pub fn new(mut reader: R, config: Option<&'a CryptConfig>) -> Result<Self, Error> {
|
||||
|
||||
let head: DataBlobHeader = unsafe { reader.read_le_value()? };
|
||||
match head.magic {
|
||||
UNCOMPRESSED_BLOB_MAGIC_1_0 => {
|
||||
let expected_crc = u32::from_le_bytes(head.crc);
|
||||
let csum_reader = ChecksumReader::new(reader, None);
|
||||
Ok(Self { state: BlobReaderState::Uncompressed { expected_crc, csum_reader }})
|
||||
}
|
||||
COMPRESSED_BLOB_MAGIC_1_0 => {
|
||||
let expected_crc = u32::from_le_bytes(head.crc);
|
||||
let csum_reader = ChecksumReader::new(reader, None);
|
||||
|
||||
let decompr = zstd::stream::read::Decoder::new(csum_reader)?;
|
||||
Ok(Self { state: BlobReaderState::Compressed { expected_crc, decompr }})
|
||||
}
|
||||
AUTHENTICATED_BLOB_MAGIC_1_0 => {
|
||||
let expected_crc = u32::from_le_bytes(head.crc);
|
||||
let mut expected_hmac = [0u8; 32];
|
||||
reader.read_exact(&mut expected_hmac)?;
|
||||
let signer = config.map(|c| c.data_signer());
|
||||
let csum_reader = ChecksumReader::new(reader, signer);
|
||||
Ok(Self { state: BlobReaderState::Signed { expected_crc, expected_hmac, csum_reader }})
|
||||
}
|
||||
AUTH_COMPR_BLOB_MAGIC_1_0 => {
|
||||
let expected_crc = u32::from_le_bytes(head.crc);
|
||||
let mut expected_hmac = [0u8; 32];
|
||||
reader.read_exact(&mut expected_hmac)?;
|
||||
let signer = config.map(|c| c.data_signer());
|
||||
let csum_reader = ChecksumReader::new(reader, signer);
|
||||
|
||||
let decompr = zstd::stream::read::Decoder::new(csum_reader)?;
|
||||
Ok(Self { state: BlobReaderState::SignedCompressed { expected_crc, expected_hmac, decompr }})
|
||||
}
|
||||
ENCRYPTED_BLOB_MAGIC_1_0 => {
|
||||
let expected_crc = u32::from_le_bytes(head.crc);
|
||||
let mut iv = [0u8; 16];
|
||||
let mut expected_tag = [0u8; 16];
|
||||
reader.read_exact(&mut iv)?;
|
||||
reader.read_exact(&mut expected_tag)?;
|
||||
let csum_reader = ChecksumReader::new(reader, None);
|
||||
let decrypt_reader = CryptReader::new(BufReader::with_capacity(64*1024, csum_reader), iv, expected_tag, config.unwrap())?;
|
||||
Ok(Self { state: BlobReaderState::Encrypted { expected_crc, decrypt_reader }})
|
||||
}
|
||||
ENCR_COMPR_BLOB_MAGIC_1_0 => {
|
||||
let expected_crc = u32::from_le_bytes(head.crc);
|
||||
let mut iv = [0u8; 16];
|
||||
let mut expected_tag = [0u8; 16];
|
||||
reader.read_exact(&mut iv)?;
|
||||
reader.read_exact(&mut expected_tag)?;
|
||||
let csum_reader = ChecksumReader::new(reader, None);
|
||||
let decrypt_reader = CryptReader::new(BufReader::with_capacity(64*1024, csum_reader), iv, expected_tag, config.unwrap())?;
|
||||
let decompr = zstd::stream::read::Decoder::new(decrypt_reader)?;
|
||||
Ok(Self { state: BlobReaderState::EncryptedCompressed { expected_crc, decompr }})
|
||||
}
|
||||
_ => bail!("got wrong magic number {:?}", head.magic)
|
||||
}
|
||||
}
|
||||
|
||||
pub fn finish(self) -> Result<R, Error> {
|
||||
match self.state {
|
||||
BlobReaderState::Uncompressed { csum_reader, expected_crc } => {
|
||||
let (reader, crc, _) = csum_reader.finish()?;
|
||||
if crc != expected_crc {
|
||||
bail!("blob crc check failed");
|
||||
}
|
||||
Ok(reader)
|
||||
}
|
||||
BlobReaderState::Compressed { expected_crc, decompr } => {
|
||||
let csum_reader = decompr.finish().into_inner();
|
||||
let (reader, crc, _) = csum_reader.finish()?;
|
||||
if crc != expected_crc {
|
||||
bail!("blob crc check failed");
|
||||
}
|
||||
Ok(reader)
|
||||
}
|
||||
BlobReaderState::Signed { csum_reader, expected_crc, expected_hmac } => {
|
||||
let (reader, crc, hmac) = csum_reader.finish()?;
|
||||
if crc != expected_crc {
|
||||
bail!("blob crc check failed");
|
||||
}
|
||||
if let Some(hmac) = hmac {
|
||||
if hmac != expected_hmac {
|
||||
bail!("blob signature check failed");
|
||||
}
|
||||
}
|
||||
Ok(reader)
|
||||
}
|
||||
BlobReaderState::SignedCompressed { expected_crc, expected_hmac, decompr } => {
|
||||
let csum_reader = decompr.finish().into_inner();
|
||||
let (reader, crc, hmac) = csum_reader.finish()?;
|
||||
if crc != expected_crc {
|
||||
bail!("blob crc check failed");
|
||||
}
|
||||
if let Some(hmac) = hmac {
|
||||
if hmac != expected_hmac {
|
||||
bail!("blob signature check failed");
|
||||
}
|
||||
}
|
||||
Ok(reader)
|
||||
}
|
||||
BlobReaderState::Encrypted { expected_crc, decrypt_reader } => {
|
||||
let csum_reader = decrypt_reader.finish()?.into_inner();
|
||||
let (reader, crc, _) = csum_reader.finish()?;
|
||||
if crc != expected_crc {
|
||||
bail!("blob crc check failed");
|
||||
}
|
||||
Ok(reader)
|
||||
}
|
||||
BlobReaderState::EncryptedCompressed { expected_crc, decompr } => {
|
||||
let decrypt_reader = decompr.finish().into_inner();
|
||||
let csum_reader = decrypt_reader.finish()?.into_inner();
|
||||
let (reader, crc, _) = csum_reader.finish()?;
|
||||
if crc != expected_crc {
|
||||
bail!("blob crc check failed");
|
||||
}
|
||||
Ok(reader)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl <'a, R: BufRead> Read for DataBlobReader<'a, R> {
|
||||
|
||||
fn read(&mut self, buf: &mut [u8]) -> Result<usize, std::io::Error> {
|
||||
match &mut self.state {
|
||||
BlobReaderState::Uncompressed { csum_reader, .. } => {
|
||||
csum_reader.read(buf)
|
||||
}
|
||||
BlobReaderState::Compressed { decompr, .. } => {
|
||||
decompr.read(buf)
|
||||
}
|
||||
BlobReaderState::Signed { csum_reader, .. } => {
|
||||
csum_reader.read(buf)
|
||||
}
|
||||
BlobReaderState::SignedCompressed { decompr, .. } => {
|
||||
decompr.read(buf)
|
||||
}
|
||||
BlobReaderState::Encrypted { decrypt_reader, .. } => {
|
||||
decrypt_reader.read(buf)
|
||||
}
|
||||
BlobReaderState::EncryptedCompressed { decompr, .. } => {
|
||||
decompr.read(buf)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,244 @@
|
|||
use failure::*;
|
||||
use std::io::{Write, Seek, SeekFrom};
|
||||
use proxmox::tools::io::WriteExt;
|
||||
|
||||
use super::*;
|
||||
|
||||
enum BlobWriterState<'a, W: Write> {
|
||||
Uncompressed { csum_writer: ChecksumWriter<'a, W> },
|
||||
Compressed { compr: zstd::stream::write::Encoder<ChecksumWriter<'a, W>> },
|
||||
Signed { csum_writer: ChecksumWriter<'a, W> },
|
||||
SignedCompressed { compr: zstd::stream::write::Encoder<ChecksumWriter<'a, W>> },
|
||||
Encrypted { crypt_writer: CryptWriter<ChecksumWriter<'a, W>> },
|
||||
EncryptedCompressed { compr: zstd::stream::write::Encoder<CryptWriter<ChecksumWriter<'a, W>>> },
|
||||
}
|
||||
|
||||
/// Data blob writer
|
||||
pub struct DataBlobWriter<'a, W: Write> {
|
||||
state: BlobWriterState<'a, W>,
|
||||
}
|
||||
|
||||
impl <'a, W: Write + Seek> DataBlobWriter<'a, W> {
|
||||
|
||||
pub fn new_uncompressed(mut writer: W) -> Result<Self, Error> {
|
||||
writer.seek(SeekFrom::Start(0))?;
|
||||
let head = DataBlobHeader { magic: UNCOMPRESSED_BLOB_MAGIC_1_0, crc: [0; 4] };
|
||||
unsafe {
|
||||
writer.write_le_value(head)?;
|
||||
}
|
||||
let csum_writer = ChecksumWriter::new(writer, None);
|
||||
Ok(Self { state: BlobWriterState::Uncompressed { csum_writer }})
|
||||
}
|
||||
|
||||
pub fn new_compressed(mut writer: W) -> Result<Self, Error> {
|
||||
writer.seek(SeekFrom::Start(0))?;
|
||||
let head = DataBlobHeader { magic: COMPRESSED_BLOB_MAGIC_1_0, crc: [0; 4] };
|
||||
unsafe {
|
||||
writer.write_le_value(head)?;
|
||||
}
|
||||
let csum_writer = ChecksumWriter::new(writer, None);
|
||||
let compr = zstd::stream::write::Encoder::new(csum_writer, 1)?;
|
||||
Ok(Self { state: BlobWriterState::Compressed { compr }})
|
||||
}
|
||||
|
||||
pub fn new_signed(mut writer: W, config: &'a CryptConfig) -> Result<Self, Error> {
|
||||
writer.seek(SeekFrom::Start(0))?;
|
||||
let head = AuthenticatedDataBlobHeader {
|
||||
head: DataBlobHeader { magic: AUTHENTICATED_BLOB_MAGIC_1_0, crc: [0; 4] },
|
||||
tag: [0u8; 32],
|
||||
};
|
||||
unsafe {
|
||||
writer.write_le_value(head)?;
|
||||
}
|
||||
let signer = config.data_signer();
|
||||
let csum_writer = ChecksumWriter::new(writer, Some(signer));
|
||||
Ok(Self { state: BlobWriterState::Signed { csum_writer }})
|
||||
}
|
||||
|
||||
pub fn new_signed_compressed(mut writer: W, config: &'a CryptConfig) -> Result<Self, Error> {
|
||||
writer.seek(SeekFrom::Start(0))?;
|
||||
let head = AuthenticatedDataBlobHeader {
|
||||
head: DataBlobHeader { magic: AUTH_COMPR_BLOB_MAGIC_1_0, crc: [0; 4] },
|
||||
tag: [0u8; 32],
|
||||
};
|
||||
unsafe {
|
||||
writer.write_le_value(head)?;
|
||||
}
|
||||
let signer = config.data_signer();
|
||||
let csum_writer = ChecksumWriter::new(writer, Some(signer));
|
||||
let compr = zstd::stream::write::Encoder::new(csum_writer, 1)?;
|
||||
Ok(Self { state: BlobWriterState::SignedCompressed { compr }})
|
||||
}
|
||||
|
||||
pub fn new_encrypted(mut writer: W, config: &'a CryptConfig) -> Result<Self, Error> {
|
||||
writer.seek(SeekFrom::Start(0))?;
|
||||
let head = EncryptedDataBlobHeader {
|
||||
head: DataBlobHeader { magic: ENCRYPTED_BLOB_MAGIC_1_0, crc: [0; 4] },
|
||||
iv: [0u8; 16],
|
||||
tag: [0u8; 16],
|
||||
};
|
||||
unsafe {
|
||||
writer.write_le_value(head)?;
|
||||
}
|
||||
|
||||
let csum_writer = ChecksumWriter::new(writer, None);
|
||||
let crypt_writer = CryptWriter::new(csum_writer, config)?;
|
||||
Ok(Self { state: BlobWriterState::Encrypted { crypt_writer }})
|
||||
}
|
||||
|
||||
pub fn new_encrypted_compressed(mut writer: W, config: &'a CryptConfig) -> Result<Self, Error> {
|
||||
writer.seek(SeekFrom::Start(0))?;
|
||||
let head = EncryptedDataBlobHeader {
|
||||
head: DataBlobHeader { magic: ENCR_COMPR_BLOB_MAGIC_1_0, crc: [0; 4] },
|
||||
iv: [0u8; 16],
|
||||
tag: [0u8; 16],
|
||||
};
|
||||
unsafe {
|
||||
writer.write_le_value(head)?;
|
||||
}
|
||||
|
||||
let csum_writer = ChecksumWriter::new(writer, None);
|
||||
let crypt_writer = CryptWriter::new(csum_writer, config)?;
|
||||
let compr = zstd::stream::write::Encoder::new(crypt_writer, 1)?;
|
||||
Ok(Self { state: BlobWriterState::EncryptedCompressed { compr }})
|
||||
}
|
||||
|
||||
pub fn finish(self) -> Result<W, Error> {
|
||||
match self.state {
|
||||
BlobWriterState::Uncompressed { csum_writer } => {
|
||||
// write CRC
|
||||
let (mut writer, crc, _) = csum_writer.finish()?;
|
||||
let head = DataBlobHeader { magic: UNCOMPRESSED_BLOB_MAGIC_1_0, crc: crc.to_le_bytes() };
|
||||
|
||||
writer.seek(SeekFrom::Start(0))?;
|
||||
unsafe {
|
||||
writer.write_le_value(head)?;
|
||||
}
|
||||
|
||||
return Ok(writer)
|
||||
}
|
||||
BlobWriterState::Compressed { compr } => {
|
||||
let csum_writer = compr.finish()?;
|
||||
let (mut writer, crc, _) = csum_writer.finish()?;
|
||||
|
||||
let head = DataBlobHeader { magic: COMPRESSED_BLOB_MAGIC_1_0, crc: crc.to_le_bytes() };
|
||||
|
||||
writer.seek(SeekFrom::Start(0))?;
|
||||
unsafe {
|
||||
writer.write_le_value(head)?;
|
||||
}
|
||||
|
||||
return Ok(writer)
|
||||
}
|
||||
BlobWriterState::Signed { csum_writer } => {
|
||||
let (mut writer, crc, tag) = csum_writer.finish()?;
|
||||
|
||||
let head = AuthenticatedDataBlobHeader {
|
||||
head: DataBlobHeader { magic: AUTHENTICATED_BLOB_MAGIC_1_0, crc: crc.to_le_bytes() },
|
||||
tag: tag.unwrap(),
|
||||
};
|
||||
|
||||
writer.seek(SeekFrom::Start(0))?;
|
||||
unsafe {
|
||||
writer.write_le_value(head)?;
|
||||
}
|
||||
|
||||
return Ok(writer)
|
||||
}
|
||||
BlobWriterState::SignedCompressed { compr } => {
|
||||
let csum_writer = compr.finish()?;
|
||||
let (mut writer, crc, tag) = csum_writer.finish()?;
|
||||
|
||||
let head = AuthenticatedDataBlobHeader {
|
||||
head: DataBlobHeader { magic: AUTH_COMPR_BLOB_MAGIC_1_0, crc: crc.to_le_bytes() },
|
||||
tag: tag.unwrap(),
|
||||
};
|
||||
|
||||
writer.seek(SeekFrom::Start(0))?;
|
||||
unsafe {
|
||||
writer.write_le_value(head)?;
|
||||
}
|
||||
|
||||
return Ok(writer)
|
||||
}
|
||||
BlobWriterState::Encrypted { crypt_writer } => {
|
||||
let (csum_writer, iv, tag) = crypt_writer.finish()?;
|
||||
let (mut writer, crc, _) = csum_writer.finish()?;
|
||||
|
||||
let head = EncryptedDataBlobHeader {
|
||||
head: DataBlobHeader { magic: ENCRYPTED_BLOB_MAGIC_1_0, crc: crc.to_le_bytes() },
|
||||
iv, tag,
|
||||
};
|
||||
writer.seek(SeekFrom::Start(0))?;
|
||||
unsafe {
|
||||
writer.write_le_value(head)?;
|
||||
}
|
||||
return Ok(writer)
|
||||
}
|
||||
BlobWriterState::EncryptedCompressed { compr } => {
|
||||
let crypt_writer = compr.finish()?;
|
||||
let (csum_writer, iv, tag) = crypt_writer.finish()?;
|
||||
let (mut writer, crc, _) = csum_writer.finish()?;
|
||||
|
||||
let head = EncryptedDataBlobHeader {
|
||||
head: DataBlobHeader { magic: ENCR_COMPR_BLOB_MAGIC_1_0, crc: crc.to_le_bytes() },
|
||||
iv, tag,
|
||||
};
|
||||
writer.seek(SeekFrom::Start(0))?;
|
||||
unsafe {
|
||||
writer.write_le_value(head)?;
|
||||
}
|
||||
return Ok(writer)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl <'a, W: Write + Seek> Write for DataBlobWriter<'a, W> {
|
||||
|
||||
fn write(&mut self, buf: &[u8]) -> Result<usize, std::io::Error> {
|
||||
match self.state {
|
||||
BlobWriterState::Uncompressed { ref mut csum_writer } => {
|
||||
csum_writer.write(buf)
|
||||
}
|
||||
BlobWriterState::Compressed { ref mut compr } => {
|
||||
compr.write(buf)
|
||||
}
|
||||
BlobWriterState::Signed { ref mut csum_writer } => {
|
||||
csum_writer.write(buf)
|
||||
}
|
||||
BlobWriterState::SignedCompressed { ref mut compr } => {
|
||||
compr.write(buf)
|
||||
}
|
||||
BlobWriterState::Encrypted { ref mut crypt_writer } => {
|
||||
crypt_writer.write(buf)
|
||||
}
|
||||
BlobWriterState::EncryptedCompressed { ref mut compr } => {
|
||||
compr.write(buf)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn flush(&mut self) -> Result<(), std::io::Error> {
|
||||
match self.state {
|
||||
BlobWriterState::Uncompressed { ref mut csum_writer } => {
|
||||
csum_writer.flush()
|
||||
}
|
||||
BlobWriterState::Compressed { ref mut compr } => {
|
||||
compr.flush()
|
||||
}
|
||||
BlobWriterState::Signed { ref mut csum_writer } => {
|
||||
csum_writer.flush()
|
||||
}
|
||||
BlobWriterState::SignedCompressed { ref mut compr } => {
|
||||
compr.flush()
|
||||
}
|
||||
BlobWriterState::Encrypted { ref mut crypt_writer } => {
|
||||
crypt_writer.flush()
|
||||
}
|
||||
BlobWriterState::EncryptedCompressed { ref mut compr } => {
|
||||
compr.flush()
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue