Struct openssl::crypto::hash::Hasher

pub struct Hasher { /* fields omitted */ }

Provides message digest (hash) computation.

Examples

Calculate a hash in one go.

use openssl::crypto::hash::{hash, Type};
let data = b"\x42\xF4\x97\xE0";
let spec = b"\x7c\x43\x0f\x17\x8a\xef\xdf\x14\x87\xfe\xe7\x14\x4e\x96\x41\xe2";
let res = hash(Type::MD5, data);
assert_eq!(res, spec);

Use the Write trait to supply the input in chunks.

use std::io::prelude::*;
use openssl::crypto::hash::{Hasher, Type};
let data = [b"\x42\xF4", b"\x97\xE0"];
let spec = b"\x7c\x43\x0f\x17\x8a\xef\xdf\x14\x87\xfe\xe7\x14\x4e\x96\x41\xe2";
let mut h = Hasher::new(Type::MD5);
h.write_all(data[0]);
h.write_all(data[1]);
let res = h.finish();
assert_eq!(res, spec);

Warning

Don't actually use MD5 and SHA-1 hashes, they're not secure anymore.

Don't ever hash passwords, use crypto::pkcs5 or bcrypt/scrypt instead.

Methods

impl Hasher

Important traits for Hasher

impl Write for Hasher

pub fn new(ty: Type) -> Hasher

Creates a new Hasher with the specified hash type.

Important traits for Vec<u8>

impl Write for Vec<u8>

pub fn finish(&mut self) -> Vec<u8>

Returns the hash of the data written since creation or the last finish and resets the hasher.

Trait Implementations

impl Write for Hasher

fn write(&mut self, buf: &[u8]) -> Result<usize>

Write a buffer into this object, returning how many bytes were written.

fn flush(&mut self) -> Result<()>

Flush this output stream, ensuring that all intermediately buffered contents reach their destination.

fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this write.

fn write_fmt(&mut self, fmt: Arguments) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered.

Important traits for &'a mut R

impl<'a, R> Read for &'a mut R where
    R: Read + ?Sized, impl<'a, W> Write for &'a mut W where
    W: Write + ?Sized, impl<'a, I> Iterator for &'a mut I where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;

fn by_ref(&mut self) -> &mut Self

Creates a "by reference" adaptor for this instance of Write.

impl Clone for Hasher

Important traits for Hasher

impl Write for Hasher

fn clone(&self) -> Hasher

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Drop for Hasher

fn drop(&mut self)

Executes the destructor for this type.