Struct openssl::crypto::hmac::HMAC

pub struct HMAC { /* fields omitted */ }

Provides HMAC computation.

Examples

Calculate a HMAC in one go.

use openssl::crypto::hash::Type;
use openssl::crypto::hmac::hmac;
let key = b"Jefe";
let data = b"what do ya want for nothing?";
let spec = b"\x75\x0c\x78\x3e\x6a\xb0\xb5\x03\xea\xa8\x6e\x31\x0a\x5d\xb7\x38";
let res = hmac(Type::MD5, key, data);
assert_eq!(res, spec);

Use the Write trait to supply the input in chunks.

use std::io::prelude::*;
use openssl::crypto::hash::Type;
use openssl::crypto::hmac::HMAC;
let key = b"Jefe";
let data: &[&[u8]] = &[b"what do ya ", b"want for nothing?"];
let spec = b"\x75\x0c\x78\x3e\x6a\xb0\xb5\x03\xea\xa8\x6e\x31\x0a\x5d\xb7\x38";
let mut h = HMAC::new(Type::MD5, &*key);
h.write_all(data[0]);
h.write_all(data[1]);
let res = h.finish();
assert_eq!(res, spec);

Methods

impl HMAC

Important traits for HMAC

impl Write for HMAC

pub fn new(ty: Type, key: &[u8]) -> HMAC

Creates a new HMAC with the specified hash type using the key.

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 HMAC

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 HMAC

Important traits for HMAC

impl Write for HMAC

fn clone(&self) -> HMAC

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Drop for HMAC

fn drop(&mut self)

Executes the destructor for this type.