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src/backup/*_index.rs: used generated magic numbers

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This commit is contained in:
Dietmar Maurer
2019-06-14 14:58:37 +02:00
parent bffd40d6b7
commit a7dd483097
3 changed files with 16 additions and 25 deletions
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6
src/backup.rs
View File

@ -121,6 +121,12 @@ pub static COMPRESSED_CHUNK_MAGIC_1_0: [u8; 8] = [191, 237, 46, 195, 108, 17, 22
// openssl::sha::sha256(b"Proxmox Backup zstd compressed encrypted chunk v1.0")[0..8]
pub static ENCR_COMPR_CHUNK_MAGIC_1_0: [u8; 8] = [9, 40, 53, 200, 37, 150, 90, 196];
// openssl::sha::sha256(b"Proxmox Backup fixed sized chunk index v1.0")[0..8]
pub static FIXED_SIZED_CHUNK_INDEX_1_0: [u8; 8] = [47, 127, 65, 237, 145, 253, 15, 205];
// openssl::sha::sha256(b"Proxmox Backup dynamic sized chunk index v1.0")[0..8]
pub static DYNAMIC_SIZED_CHUNK_INDEX_1_0: [u8; 8] = [28, 145, 78, 165, 25, 186, 179, 205];
mod crypt_setup;
pub use crypt_setup::*;

15
src/backup/dynamic_index.rs
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@ -24,13 +24,12 @@ use super::{DataChunk, DataChunkBuilder};
#[repr(C)]
pub struct DynamicIndexHeader {
/// The string `PROXMOX-DIDX`
pub magic: [u8; 12],
pub version: u32,
pub magic: [u8; 8],
pub uuid: [u8; 16],
pub ctime: u64,
/// Sha256 over the index ``SHA256(offset1||digest1||offset2||digest2||...)``
pub index_csum: [u8; 32],
reserved: [u8; 4024], // overall size is one page (4096 bytes)
reserved: [u8; 4030], // overall size is one page (4096 bytes)
}
@ -80,15 +79,10 @@ impl DynamicIndexReader {
let header = unsafe { &* (buffer.as_ptr() as *const DynamicIndexHeader) };
if header.magic != *b"PROXMOX-DIDX" {
if header.magic != super::DYNAMIC_SIZED_CHUNK_INDEX_1_0 {
bail!("got unknown magic number for {:?}", path);
}
let version = u32::from_le(header.version);
if version != 1 {
bail!("got unsupported version number ({}) for {:?}", version, path);
}
let ctime = u64::from_le(header.ctime);
let rawfd = file.as_raw_fd();
@ -429,8 +423,7 @@ impl DynamicIndexWriter {
let mut buffer = vec::undefined(header_size);
let header = crate::tools::map_struct_mut::<DynamicIndexHeader>(&mut buffer)?;
header.magic = *b"PROXMOX-DIDX";
header.version = u32::to_le(1);
header.magic = super::DYNAMIC_SIZED_CHUNK_INDEX_1_0;
header.ctime = u64::to_le(ctime);
header.uuid = *uuid.as_bytes();

20
src/backup/fixed_index.rs
View File

@ -17,16 +17,14 @@ use super::ChunkInfo;
/// Header format definition for fixed index files (`.fidx`)
#[repr(C)]
pub struct FixedIndexHeader {
/// The string `PROXMOX-FIDX`
pub magic: [u8; 12],
pub version: u32,
pub magic: [u8; 8],
pub uuid: [u8; 16],
pub ctime: u64,
pub size: u64,
pub chunk_size: u64,
/// Sha256 over the index ``SHA256(digest1||digest2||...)``
pub index_csum: [u8; 32],
reserved: [u8; 4008], // overall size is one page (4096 bytes)
pub size: u64,
pub chunk_size: u64,
reserved: [u8; 4016], // overall size is one page (4096 bytes)
}
// split image into fixed size chunks
@ -78,15 +76,10 @@ impl FixedIndexReader {
let header = unsafe { &mut * (buffer.as_ptr() as *mut FixedIndexHeader) };
if header.magic != *b"PROXMOX-FIDX" {
if header.magic != super::FIXED_SIZED_CHUNK_INDEX_1_0 {
bail!("got unknown magic number for {:?}", path);
}
let version = u32::from_le(header.version);
if version != 1 {
bail!("got unsupported version number ({})", version);
}
let size = u64::from_le(header.size) as usize;
let ctime = u64::from_le(header.ctime);
let chunk_size = u64::from_le(header.chunk_size) as usize;
@ -244,8 +237,7 @@ impl FixedIndexWriter {
let buffer = vec![0u8; header_size];
let header = unsafe { &mut * (buffer.as_ptr() as *mut FixedIndexHeader) };
header.magic = *b"PROXMOX-FIDX";
header.version = u32::to_le(1);
header.magic = super::FIXED_SIZED_CHUNK_INDEX_1_0;
header.ctime = u64::to_le(ctime);
header.size = u64::to_le(size as u64);
header.chunk_size = u64::to_le(chunk_size as u64);