1 use crate::APUB_JSON_CONTENT_TYPE;
2 use actix_web::HttpRequest;
4 use http::{header::HeaderName, HeaderMap, HeaderValue};
5 use http_signature_normalization_actix::Config as ConfigActix;
6 use http_signature_normalization_reqwest::prelude::{Config, SignExt};
7 use lemmy_utils::LemmyError;
9 use once_cell::sync::Lazy;
13 sign::{Signer, Verifier},
15 use reqwest::{Client, Response};
16 use serde::{Deserialize, Serialize};
17 use sha2::{Digest, Sha256};
18 use std::str::FromStr;
21 static CONFIG2: Lazy<ConfigActix> = Lazy::new(ConfigActix::new);
22 static HTTP_SIG_CONFIG: Lazy<Config> = Lazy::new(Config::new);
24 /// Creates an HTTP post request to `inbox_url`, with the given `client` and `headers`, and
25 /// `activity` as request body. The request is signed with `private_key` and then sent.
26 pub async fn sign_and_send(
32 ) -> Result<Response, LemmyError> {
33 let signing_key_id = format!("{}#main-key", actor_id);
35 let mut headers = HeaderMap::new();
36 let mut host = inbox_url.domain().expect("read inbox domain").to_string();
37 if let Some(port) = inbox_url.port() {
38 host = format!("{}:{}", host, port);
41 HeaderName::from_str("Content-Type")?,
42 HeaderValue::from_str(APUB_JSON_CONTENT_TYPE)?,
44 headers.insert(HeaderName::from_str("Host")?, HeaderValue::from_str(&host)?);
47 .post(&inbox_url.to_string())
49 .signature_with_digest(
50 HTTP_SIG_CONFIG.clone(),
54 move |signing_string| {
55 let private_key = PKey::private_key_from_pem(private_key.as_bytes())?;
56 let mut signer = Signer::new(MessageDigest::sha256(), &private_key)?;
57 signer.update(signing_string.as_bytes())?;
59 Ok(base64::encode(signer.sign_to_vec()?)) as Result<_, LemmyError>
67 /// Verifies the HTTP signature on an incoming inbox request.
68 pub fn verify_signature(request: &HttpRequest, public_key: &str) -> Result<(), LemmyError> {
69 let verified = CONFIG2
72 request.uri().path_and_query(),
73 request.headers().clone(),
75 .verify(|signature, signing_string| -> Result<bool, LemmyError> {
77 "Verifying with key {}, message {}",
78 &public_key, &signing_string
80 let public_key = PKey::public_key_from_pem(public_key.as_bytes())?;
81 let mut verifier = Verifier::new(MessageDigest::sha256(), &public_key)?;
82 verifier.update(signing_string.as_bytes())?;
83 Ok(verifier.verify(&base64::decode(signature)?)?)
87 debug!("verified signature for {}", &request.uri());
90 Err(anyhow!("Invalid signature on request: {}", &request.uri()).into())
94 #[derive(Clone, Debug, Deserialize, Serialize)]
95 #[serde(rename_all = "camelCase")]
96 pub struct PublicKey {
97 pub(crate) id: String,
98 pub(crate) owner: Box<Url>,
99 pub public_key_pem: String,