[][src]Struct openssl::hash::Hasher

pub struct Hasher { /* fields omitted */ }

Provides message digest (hash) computation.


Calculate a hash in one go:

use openssl::hash::{hash, MessageDigest};

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(MessageDigest::md5(), data).unwrap();
assert_eq!(&*res, spec);

Supply the input in chunks:

use openssl::hash::{Hasher, MessageDigest};

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(MessageDigest::md5()).unwrap();
let res = h.finish().unwrap();
assert_eq!(&*res, spec);

Use an XOF hasher (OpenSSL 1.1.1+):

    use openssl::hash::{hash_xof, MessageDigest};

    let data = b"\x41\x6c\x6c\x20\x79\x6f\x75\x72\x20\x62\x61\x73\x65\x20\x61\x72\x65\x20\x62\x65\x6c\x6f\x6e\x67\x20\x74\x6f\x20\x75\x73";
    let spec = b"\x49\xd0\x69\x7f\xf5\x08\x11\x1d\x8b\x84\xf1\x5e\x46\xda\xf1\x35";
    let mut buf = vec![0; 16];
    hash_xof(MessageDigest::shake_128(), data, buf.as_mut_slice()).unwrap();
    assert_eq!(buf, spec);


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

Don't ever hash passwords, use the functions in the pkcs5 module or bcrypt/scrypt instead.

For extendable output functions (XOFs, i.e. SHAKE128/SHAKE256), you must use finish_xof instead of finish and provide a buf to store the hash. The hash will be as long as the buf.


impl Hasher[src]

pub fn new(ty: MessageDigest) -> Result<Hasher, ErrorStack>[src]

Creates a new Hasher with the specified hash type.

pub fn update(&mut self, data: &[u8]) -> Result<(), ErrorStack>[src]

Feeds data into the hasher.

pub fn finish(&mut self) -> Result<DigestBytes, ErrorStack>[src]

Returns the hash of the data written and resets the non-XOF hasher.

pub fn finish_xof(&mut self, buf: &mut [u8]) -> Result<(), ErrorStack>[src]

Writes the hash of the data into the supplied buf and resets the XOF hasher. The hash will be as long as the buf.

Trait Implementations

impl Clone for Hasher[src]

impl Drop for Hasher[src]

impl Send for Hasher[src]

impl Sync for Hasher[src]

impl Write for Hasher[src]

Auto Trait Implementations

impl RefUnwindSafe for Hasher

impl Unpin for Hasher

impl UnwindSafe for Hasher

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized

impl<T> Borrow<T> for T where
    T: ?Sized

impl<T> BorrowMut<T> for T where
    T: ?Sized

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 

impl<T> ToOwned for T where
    T: Clone

type Owned = T

The resulting type after obtaining ownership.

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.