ac4e349b5e
This is supposed to contain only the parts necessary to communicate with the server via the proxmox backup protocol. (Including the chunker, which is currently `include!()`d from the main crate. Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
48 lines
1.2 KiB
Rust
48 lines
1.2 KiB
Rust
use failure::{bail, Error};
|
|
|
|
pub fn digest_to_hex(digest: &[u8]) -> String {
|
|
const HEX_CHARS: &'static [u8; 16] = b"0123456789abcdef";
|
|
|
|
let mut buf = Vec::<u8>::with_capacity(digest.len() * 2);
|
|
|
|
for i in 0..digest.len() {
|
|
buf.push(HEX_CHARS[(digest[i] >> 4) as usize]);
|
|
buf.push(HEX_CHARS[(digest[i] & 0xf) as usize]);
|
|
}
|
|
|
|
unsafe { String::from_utf8_unchecked(buf) }
|
|
}
|
|
|
|
pub unsafe fn swapped_data_to_buf<T>(data: &T) -> &[u8] {
|
|
std::slice::from_raw_parts(data as *const T as *const u8, std::mem::size_of::<T>())
|
|
}
|
|
|
|
fn hex_nibble(c: u8) -> Result<u8, Error> {
|
|
Ok(match c {
|
|
b'0'..=b'9' => c - b'0',
|
|
b'a'..=b'f' => c - b'a' + 0xa,
|
|
b'A'..=b'F' => c - b'A' + 0xa,
|
|
_ => bail!("not a hex digit: {}", c as char),
|
|
})
|
|
}
|
|
|
|
#[inline]
|
|
pub fn parse_hex_digest<T: AsRef<[u8]>>(hex: T) -> Result<[u8; 32], Error> {
|
|
let mut digest: [u8; 32] = unsafe { std::mem::uninitialized() };
|
|
|
|
let hex = hex.as_ref();
|
|
|
|
if hex.len() != 64 {
|
|
bail!(
|
|
"invalid hex digest ({} instead of 64 digits long)",
|
|
hex.len()
|
|
);
|
|
}
|
|
|
|
for i in 0..32 {
|
|
digest[i] = (hex_nibble(hex[i * 2])? << 4) + hex_nibble(hex[i * 2 + 1])?;
|
|
}
|
|
|
|
Ok(digest)
|
|
}
|