1 files changed, 112 insertions, 0 deletions

diff --git a/src/auth.rs b/src/auth.rs
new file mode 100644
index 0000000..e22262c
--- /dev/null
+++ b/src/auth.rs
@@ -0,0 +1,112 @@
+use crate::error::Error;
+use crate::schema::{Db, Transaction};
+use jsonwebtoken::{decode, Algorithm, DecodingKey, Validation};
+use serde::{Deserialize, Serialize};
+use warp::header::headers_cloned;
+use warp::http::header::{HeaderMap, HeaderValue, AUTHORIZATION};
+use warp::{reject, Filter, Rejection};
+use thiserror::Error;
+use anyhow::*;
+
+const BEARER: &str = "Bearer ";
+const PUBLIC_KEY_PEM: &str = "-----BEGIN PUBLIC KEY-----
+MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4nU0G4WjkmcQUx0hq6LQ
+uV5Q+ACmUFL/OjoYMDwC/O/6pCd1UZgCfgHN2xEffDPznzcTn8OiFRxr4oWyBiny
+rUpnY4mhy0SQUwoeCw7YkcHAyhCjNT74aR/ohX0MCj0qRRdbt5ZQXM/GC3HJuXE1
+ptSuhFgQxziItamn8maoJ6JUSVEXVO1NOrrjoM3r7Q+BK2B+sX4/bLZ+VG5g1q2n
+EbFdTHS6pHqtZNHQndTmEKwRfh0RYtzEzOXuO6e1gQY42Tujkof40dhGCIU7TeIG
+GHwdFxy1niLkXwtHNjV7lnIOkTbx6+sSPamRfQAlZqUWM2Lf5o+7h3qWP3ENB138
+sQIDAQAB
+-----END PUBLIC KEY-----";
+
+// const private_key_pem: &str = "-----BEGIN RSA PRIVATE KEY-----
+// MIIEpAIBAAKCAQEA4nU0G4WjkmcQUx0hq6LQuV5Q+ACmUFL/OjoYMDwC/O/6pCd1
+// UZgCfgHN2xEffDPznzcTn8OiFRxr4oWyBinyrUpnY4mhy0SQUwoeCw7YkcHAyhCj
+// NT74aR/ohX0MCj0qRRdbt5ZQXM/GC3HJuXE1ptSuhFgQxziItamn8maoJ6JUSVEX
+// VO1NOrrjoM3r7Q+BK2B+sX4/bLZ+VG5g1q2nEbFdTHS6pHqtZNHQndTmEKwRfh0R
+// YtzEzOXuO6e1gQY42Tujkof40dhGCIU7TeIGGHwdFxy1niLkXwtHNjV7lnIOkTbx
+// 6+sSPamRfQAlZqUWM2Lf5o+7h3qWP3ENB138sQIDAQABAoIBAD23nYTmrganag6M
+// wPFrBSGP79c3Lhx0EjUHQjJbGKFgsdltG48qM3ut+DF9ACy0Z+/7bbC7+39vaIOq
+// 1jLR2d6aiYTaLKseO4s2FawD1sgamvU3BZPsXn0gAhnnU5Gyy8Nas1dccvhoc9wI
+// neaZUPrvucQ90AzLfo6r9yacDbYHB1lOyomApUvpJxOgHISGEtc9qGPDrdH19aF0
+// 8fCv2bbQRh+TChgN3IB0o5w0wXaI7YAyAouAv/AzHCoEMpt7OGjFTkjh/ujlPL9O
+// +FLuJNsQRHDN0gJo2pcvwGwDCsioMixQ9bZ7ZrUu2BNpEQygyeSbj9ZI1iRvhosO
+// JU3rwEECgYEA9MppTYA6A9WQbCCwPH1QMpUAmPNVSWVhUVag4lGOEhdCDRcz9ook
+// DohQMKctiEB1luKuvDokxo0uMOfMO9/YwjsRB7qjQip7Th1zMJIjD+A+juLzHK4r
+// /RiRtWYGAnF8mptDvE+93JsPb3C/lQLvIhio5GQYWBqPJu6SpeosIskCgYEA7NPi
+// Gbffzr2UQhW8BNKmctEEh8yFRVojFo3wwwWxSNUVXGSmSm31CL+Q8h817R+2OkPV
+// 1ZMUOBU4UJiqFt28kIvTDFqbAJlJQGCpY2mY7OLQiD2A+TVLcFrHmoCaPfCAK1Qd
+// hQ0PmFK7Mf8qClpA3E5chop/WfKQfiu46sZv1qkCgYAhGdXPcw1lQ1W6KVlrdI6J
+// qHhiNlVMDXdxZkNvFxQdAiQeXQrbxaZGiMw/J/wSNpUwCAsUzM/4QVMDrfSCDCzl
+// ZtNQtj4pTlFKKNVQthIjrXEIJUw2jp7IJLBfVSJu5iWxSlmId0f3MsiNizN81N69
+// P5Rm/doE3+KHoy8VXGsHcQKBgQCkNh62enqjHWypjex6450qS6f6iWN3PRLLVsw0
+// TcQpniZblCaBwVCAKmRUnjOEIdL2/4ZLutnwMTaFG/YEOOfAylMiY8jKV38lNmD9
+// X4D78CFr9klxgvS2CRwSE03f2NzmLkLxuKaxldvaxPTfjMkgeO1LFMlNExYBhkuH
+// 7uQpUQKBgQCKX6qMNh2gSdgG7qyxfTFZ4y5EGOBoKe/dE+IcVF3Vnh6DZVbCAbBL
+// 5EdFWZSrCnDjA4xiKW55mwp95Ud9EZsZAb13L8V9t82eK+UDBoWlb7VRNYpda/x1
+// 5/i4qQJ28x2UNJDStpYFpnp4Ba1lvXjKngIbDPkjU+hbBJ+BNGAIeg==
+// -----END RSA PRIVATE KEY-----";
+
+/// sub: Subject, user identifier
+/// exp: Expiration date, Unix Time, epoch
+/// puk: Public Key? Not 100% on this
+#[derive(Debug, Serialize, Deserialize)]
+struct Claims {
+    sub: String,
+    exp: usize,
+    puk: String,
+}
+
+// #[derive(Error, Debug)]
+// pub enum Nope {
+//     #[error("Invalid header")]
+//     InvalidHeader {
+//         expected: String,
+//         found: String,
+//     },
+// }
+
+pub fn with_auth(
+    db: Db,
+    t: Transaction,
+) -> impl Filter<Extract = (String,), Error = Rejection> + Clone {
+    headers_cloned()
+        .map(move |headers: HeaderMap<HeaderValue>| (db.clone(), headers))
+        .and_then(authorize)
+}
+
+impl warp::reject::Reject for Nope {}
+
+async fn authorize((db, headers): (Db, HeaderMap<HeaderValue>)) -> Result<String, Error> {
+    match jwt_from_header(&headers) {
+        Ok(jwt) => {
+            let decoded = decode::<Claims>(
+                &jwt,
+                // TODO: what key are we using here? pass db/pw store here to get the claimant's
+                // public key <10-04-21, yigit> //
+                &DecodingKey::from_rsa_pem(PUBLIC_KEY_PEM.as_bytes()).unwrap(),
+                &Validation::new(Algorithm::HS512),
+            )
+            .map_err(|_| reject::custom(Error::JWTTokenError))
+            .unwrap();
+
+            Ok(decoded.claims.puk)
+        }
+        Err(e) => return Err(anyhow!("missing!"));
+    }
+}
+
+fn jwt_from_header(headers: &HeaderMap<HeaderValue>) -> Result<String, Error> {
+    let header = match headers.get(AUTHORIZATION) {
+        Some(v) => v,
+        None => return Err(Error::NoAuthHeaderError),
+    };
+    let auth_header = match std::str::from_utf8(header.as_bytes()) {
+        Ok(v) => v,
+        Err(_) => return Err(Error::NoAuthHeaderError),
+    };
+    if !auth_header.starts_with(BEARER) {
+        return Err(Error::InvalidAuthHeaderError);
+    }
+    Ok(auth_header.trim_start_matches(BEARER).to_owned())
+}