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.

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 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.

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.

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

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