Struct actix_web_lab::extract::BodyHash

pub struct BodyHash<T, D: Digest> { /* private fields */ }

Wraps an extractor and calculates a body checksum hash alongside.

If your extractor would usually be T and you want to create a hash of type D then you need to use BodyHash<T, D>. It is assumed that the T extractor will consume the payload. Any hasher that implements Digest can be used.

Errors

This extractor produces no errors of its own and all errors from the underlying extractor are propagated correctly; for example, if the payload limits are exceeded.

Example

use actix_web::{Responder, web};
use actix_web_lab::extract::BodyHash;
use sha2::Sha256;

async fn hash_payload(form: BodyHash<web::Json<T>, Sha256>) -> impl Responder {
    if !form.verify_slice(b"correct-signature") {
        // return unauthorized error
    }

    "Ok"
}

Implementations

impl<T, D: Digest> BodyHash<T, D>

pub fn hash(&self) -> &[u8]

Returns hash slice.

pub fn hash_size(&self) -> usize

Returns hash output size.

pub fn verify_slice(&self, tag: &[u8]) -> bool

Verifies HMAC hash against provides tag using constant-time equality.

pub fn into_parts(self) -> (T, Bytes, Vec<u8>)

Returns tuple containing body type, raw body bytes, and owned hash.

Trait Implementations

impl<T: Clone, D: Clone + Digest> Clone for BodyHash<T, D> where
    D::OutputSize: Clone, 

fn clone(&self) -> BodyHash<T, D>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Debug, D: Debug + Digest> Debug for BodyHash<T, D> where
    D::OutputSize: Debug, 

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<T, D> FromRequest for BodyHash<T, D> where
    T: FromRequest + 'static,
    D: Digest + 'static, 

type Error = T::Error

The associated error which can be returned.

type Future = LocalBoxFuture<'static, Result<Self, Self::Error>>

Future that resolves to a Self.

fn from_request(req: &HttpRequest, payload: &mut Payload) -> Self::Future

Create a Self from request parts asynchronously.

fn extract(req: &HttpRequest) -> Self::Future

Create a Self from request head asynchronously.