Key and http signing abstractions for noteposter, signed_post request function

HitLock/src/main.rs

@@ -3,7 +3,7 @@ mod users;
 mod webfinger;
 
 use std::{
-    fmt::{self, Debug},
+    fmt,
     iter::once,
     panic,
     task::{Context, Poll},

NotePoster/src/http.rs

@@ -0,0 +1,43 @@
+use std::{fmt::Display, path::Path};
+
+pub use ureq::http::{HeaderMap, StatusCode};
+
+#[derive(Clone, Copy)]
+pub enum Method {
+    GET,
+    HEAD,
+    OPTIONS,
+    TRACE,
+    PUT,
+    DELETE,
+    POST,
+    PATCH,
+    CONNECT,
+}
+
+impl Display for Method {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Method::GET => write!(f, "get"),
+            Method::HEAD => write!(f, "head"),
+            Method::OPTIONS => write!(f, "options"),
+            Method::TRACE => write!(f, "trace"),
+            Method::PUT => write!(f, "put"),
+            Method::DELETE => write!(f, "delete"),
+            Method::POST => write!(f, "post"),
+            Method::PATCH => write!(f, "patch"),
+            Method::CONNECT => write!(f, "connect"),
+        }
+    }
+}
+
+pub struct Target<'a> {
+    pub host: &'a str,
+    pub path: &'a Path,
+}
+
+pub struct HttpSignature {
+    pub signature: String,
+    pub digest: String,
+    pub date: String,
+}

NotePoster/src/key.rs

@@ -0,0 +1,44 @@
+use std::{fs, io, path::PathBuf};
+
+use base64::prelude::*;
+use openssl::{
+    hash::MessageDigest,
+    pkey::{PKey, Private, Public},
+    sign::Signer,
+};
+
+pub struct Key {
+    pub(crate) privkey: PKey<Private>,
+    pub(crate) pubkey: PKey<Public>,
+    pub(crate) key_id: String,
+}
+
+impl Key {
+    pub fn from_files(
+        privkey_file: PathBuf,
+        pubkey_file: PathBuf,
+        key_id: String,
+    ) -> Result<Self, io::Error> {
+        let privkey_file = fs::read(privkey_file)?;
+        let pubkey_file = fs::read(pubkey_file)?;
+
+        Ok(Self::from_bytes(&privkey_file, &pubkey_file, key_id))
+    }
+
+    pub fn from_bytes(privkey: &[u8], pubkey: &[u8], key_id: String) -> Self {
+        let privkey = PKey::private_key_from_pem(privkey).expect("Failed decoding private key pem");
+        let pubkey = PKey::public_key_from_pem(pubkey).expect("Failed decoding public key pem");
+
+        Self {
+            privkey,
+            pubkey,
+            key_id,
+        }
+    }
+
+    pub fn sign(&self, bytes: &[u8]) -> String {
+        let mut signer = Signer::new(MessageDigest::sha256(), &self.privkey).unwrap();
+        signer.update(bytes).unwrap();
+        BASE64_STANDARD.encode(signer.sign_to_vec().unwrap())
+    }
+}

NotePoster/src/lib.rs

@@ -0,0 +1,90 @@
+use std::time::SystemTime;
+
+use base64::prelude::*;
+use http::{HeaderMap, HttpSignature, Method, StatusCode, Target};
+use httpdate::fmt_http_date;
+use key::Key;
+use log::debug;
+use sha2::Digest;
+
+pub mod http;
+pub mod key;
+
+fn sha256sum(bytes: &[u8]) -> String {
+    let mut hasher = sha2::Sha256::new();
+
+    hasher.update(bytes);
+
+    return BASE64_STANDARD.encode(hasher.finalize());
+}
+
+pub fn sign_request(
+    key: Key,
+    Target { host, path }: Target,
+    method: Method,
+    body: &[u8],
+) -> HttpSignature {
+    let date = fmt_http_date(SystemTime::now());
+
+    let digest = format!("SHA-256={}", sha256sum(body));
+    debug!("digest: {}", digest);
+
+    let mut headers = String::new();
+    headers.push_str(format!("(request-target): {} {}\n", method, path.display()).as_str());
+    headers.push_str(format!("host: {}\n", host).as_str());
+    headers.push_str(format!("date: {}\n", date).as_str());
+    headers.push_str(format!("digest: {}", digest).as_str());
+
+    debug!("signed_string: {:?}", headers);
+
+    let signature = key.sign(headers.as_bytes());
+
+    let header = format!(
+        "keyId=\"{}\",algorithm=\"rsa-sha256\",headers=\"(request-target) host date digest\",signature=\"{}\"",
+        key.key_id, signature
+    );
+
+    debug!("header: {}", header);
+
+    HttpSignature {
+        signature: header,
+        digest,
+        date,
+    }
+}
+
+pub fn signed_post(
+    key: Key,
+    target @ Target { host, path }: Target,
+    mut extra_headers: HeaderMap,
+    body: &[u8],
+) -> (StatusCode, Vec<u8>) {
+    let HttpSignature {
+        signature,
+        digest,
+        date,
+    } = sign_request(key, target, Method::POST, body);
+
+    let url = format!("https://{}{}", host, path.display());
+
+    let mut req = ureq::post(url);
+    {
+        let headers = req.headers_mut().unwrap();
+        headers.extend(extra_headers.drain());
+    }
+    let response = req
+        .header("Signature", signature)
+        .header("host", host)
+        .header("date", date)
+        .header("digest", digest)
+        .send(body)
+        .expect("Failed to send request");
+
+    (
+        response.status(),
+        response
+            .into_body()
+            .read_to_vec()
+            .expect("Failed to read the response as bytes"),
+    )
+}

NotePoster/src/main.rs

@@ -1,86 +1,37 @@
-use base64::prelude::*;
-use httpdate::fmt_http_date;
-use openssl::hash::MessageDigest;
-use openssl::pkey::PKey;
-use openssl::sign::Signer;
-use serde::{Deserialize, Serialize};
-use sha2::Digest;
-use std::time::SystemTime;
-
-#[derive(Serialize, Deserialize)]
-struct CreateActivity {
-    street: String,
-    city: String,
-}
-
-fn sha256sum(bytes: &[u8]) -> String {
-    let mut hasher = sha2::Sha256::new();
-
-    hasher.update(bytes);
-
-    return BASE64_STANDARD.encode(hasher.finalize());
-}
+use log::info;
+use noteposter::{http::Target, key::Key, signed_post};
+use std::path::Path;
+use ureq::http::{HeaderMap, HeaderValue, header::CONTENT_TYPE};
 
 fn main() {
     let host = "estradiol.city";
-    let path = "/users/ity/inbox";
-
-    let url = format!("https://{}{}", host, path);
+    let path = Path::new("/users/ity/inbox");
 
     let key_id = "https://testing4host.com/users/test71/#main-key";
 
-    let json = include_bytes!("note.json");
-
-    let digest = format!("SHA-256={}", sha256sum(json));
-    println!("digest: {}", digest);
-
-    let date = fmt_http_date(SystemTime::now());
-
-    let mut headers = String::new();
-    headers.push_str(format!("(request-target): post {}\n", path).as_str());
-    headers.push_str(format!("host: {}\n", host).as_str());
-    headers.push_str(format!("date: {}\n", date).as_str());
-    headers.push_str(format!("digest: {}", digest).as_str());
-
-    println!("signed_string: {:?}", headers);
-
-    let privkey_file = include_str!("private.pem");
-    let pubkey_file = include_str!("public.pem");
-
-    let privkey =
-        PKey::private_key_from_pem(privkey_file.as_bytes()).expect("Failed decoding private.pem");
-    let _pubkey =
-        PKey::public_key_from_pem(pubkey_file.as_bytes()).expect("Failed decoding public.pem");
-
-    let mut signer = Signer::new(MessageDigest::sha256(), &privkey).unwrap();
-    signer.update(headers.as_bytes()).unwrap();
-    let signature = BASE64_STANDARD.encode(signer.sign_to_vec().unwrap());
-
-    let header = format!(
-        "keyId=\"{}\",algorithm=\"rsa-sha256\",headers=\"(request-target) host date digest\",signature=\"{}\"",
-        key_id, signature
+    let key = Key::from_files(
+        "private.pem".into(),
+        "public.pem".into(),
+        key_id.to_string(),
+    )
+    .expect("Failed to read key files");
+
+    let (_status, res) = signed_post(
+        key,
+        Target { host, path },
+        {
+            let mut headers = HeaderMap::new();
+            headers.insert(
+                CONTENT_TYPE,
+                HeaderValue::from_static("application/activity+json"),
+            );
+            headers
+        },
+        include_bytes!("note.json"),
     );
 
-    println!("header: {}", header);
-
-    let response = ureq::post(url)
-        .header("Content-Type", "application/activity+json")
-        .header("Signature", header)
-        .header("host", host)
-        .header("date", date)
-        .header("digest", digest)
-        .send(json);
-
-    match response {
-        Err(v) => println!("{:#?}", v),
-        Ok(v) => {
-            println!("Status: {}", v.status());
-            println!(
-                "Response: {}",
-                v.into_body()
-                    .read_to_string()
-                    .expect("Invalid response: decode error")
-            );
-        }
-    }
+    info!(
+        "Response: {}",
+        String::from_utf8(res).expect("Invalid response: decode error")
+    );
 }