pruefungChecksums in pure Rust.
Add this crate to the Cargo.toml:
toml
[dependencies]
pruefung = "^0.1.0"
Check out the Sums section to see the minimal required version you need depending on the algorithm you wish to use.
All the checksums are implemented using the same logic as the hashes crate
of the RustCrypto project, implementing the digest::Digest, and the
core::hasher::Hasher traits when possible (less than 64 bits in the
output).
Then, to compute a hash, for instance a CRC32 (Ethernet standard):
```rust extern crate pruefung; use std::hash::Hasher;
let mut hasher = pruefung::crc32::CRC32(); // Instantiate a hasher let data = b"Hello, world !";
hasher.write(data); // Feed the hasher hasher.write("String data".as_bytes()); // (possibly multiple times)
let hash = hasher.finish(); // Consume the hasher println!("Result: {:x}", hash) // print the result as native hex ```
The crate itself is no_std, but provides digest::Digest implementations
for convenience and integration with the hashes crate. Those bindings can
be scrapped off however by disabling the default features of the crates, adding
the following line to yout Cargo.toml:
toml
[dependencies.pruefung]
version = "^0.1.0"
default-features = false
Latest version of the crate implements the following checksums:
Algorithm | since | implemented as
------------------- | ------- | --------
Adler32 | 0.1.0 | ::adler32::Adler32
BSD checksum | 0.1.0 | ::bsd::Bsd
CRC32 | 0.2.0 | ::crc::crc32::CRC32
CRC32C | 0.2.0 | ::crc::crc32::CRC32C
Fletcher16 | 0.1.0 | ::fletcher16::Fletcher16
FNV0-32 | 0.2.0 | ::fnv::fnv32::Fnv32z
FNV1-32 | 0.2.0 | ::fnv::fnv32::Fnv32
FNV1a-32 | 0.2.0 | ::fnv::fnv32::Fnv32a
FNV0-64 | 0.2.0 | ::fnv::fnv64::Fnv64z
FNV1-64 | 0.2.0 | ::fnv::fnv64::Fnv64
FNV1a-64 | 0.2.0 | ::fnv::fnv64::Fnv64a
SysV checksum | 0.1.0 | ::sysv::SysV
UNIX checksum | 0.2.0 | ::unix::Unix
These checksums are NOT cryptographically secure. They should not be used for something else than data validation against accidental modifications: an attacker could easily forge a file to pass any of these checksums ! For secure checksums, look at the hashes implemented by the RustCrypto team.
pruefung ?I was in Switzerland when I started this project. Yet, I don't really speak
german. But a slug version of zyklische-redundanzprüfung seemed like a nice
name, instead of another checksum, cksum, checksums, crc, etc. crate.