Sig(0) verification finally works

src/auth.rs

@@ -1,39 +1,15 @@
-use std::{
+use std::fs::read_to_string;
-    fs::{read_to_string, File},
-    io::{Read, Write},
-};
 
 use base64::prelude::*;
-use ring::signature::Ed25519KeyPair;
 
-pub fn verify(user: String, signature: &[u8], message: &[u8]) -> bool {
+pub fn verify(signature: &[u8], message: &[u8]) -> bool {
-    let str = read_to_string("/home/xander/Desktop/dnsclient/dns.pub").unwrap();
+
+    let str = read_to_string("dns.pub").unwrap(); //TODO: pub ssh key use zauth
+
     let key_split: Vec<&str> = str.split_ascii_whitespace().collect();
     let blob = BASE64_STANDARD.decode(key_split[1]).unwrap();
 
-    let mut prev = vec![ 0x30, 0x2a, 0x30,0x05, 0x06,0x03,0x2b,0x65, 0x70, 0x03, 0x21, 0x00];
+    let key  = ring::signature::UnparsedPublicKey::new(&ring::signature::ED25519, &blob.as_slice()[19..]);
-    prev.extend_from_slice(&blob.as_slice()[19..]);
-    let s = prev.as_slice();
-    println!("{:#?}", &blob.as_slice()[19..]);
 
-
+    return key.verify(&message, signature.as_ref()).is_ok();
-    let mut file = File::create("foo.txt").unwrap();
-    file.write_all(s);
-
-    let mut pem = File::open("/home/xander/Desktop/dnsclient/cert.der").unwrap();
-    let mut pem_buf = Vec::<u8>::new();
-    pem.read_to_end(&mut pem_buf).unwrap();
-    let key = Ed25519KeyPair::from_pkcs8_maybe_unchecked(&pem_buf).unwrap();
-    let mut pem = File::open("/home/xander/Desktop/dnsclient/der").unwrap();
-    let mut pem_buf = Vec::<u8>::new();
-    pem.read_to_end(&mut pem_buf).unwrap();
-
-    // let rng = rand::SystemRandom::new();
-    // let mut signature = vec![];
-    // key.sign(&signature::RSA_PKCS1_SHA256, &rng, MESSAGE, &mut signature);
-    let k  = ring::signature::UnparsedPublicKey::new(&ring::signature::ED25519, &blob.as_slice()[19..]);
-    println!("{:#?}",k.verify(message, signature.as_ref()));
-    
-
-    return false;
 }

src/parser.rs

@@ -173,7 +173,6 @@ impl FromBytes for LabelString {
         }
 
         if bytes[*i] & 0b11000000 != 0 {
-            println!("YOOW");
             let offset = u16::from_be_bytes(bytes[*i..*i + 2].try_into().unwrap()) & 0b0011111111111111;
             if *i <= offset as usize {
                 return Err(ParseError {
@@ -301,8 +300,6 @@ impl FromBytes for Message {
         for _ in 0..header.qdcount {
             question.push(Question::from_bytes(&bytes, i)?);
         }
-        println!("{:#?}", question);
-        println!("{:#?}", header);
 
         let mut answer = vec![];
         for _ in 0..header.ancount {
@@ -313,7 +310,6 @@ impl FromBytes for Message {
         for _ in 0..header.nscount {
             authority.push(RR::from_bytes(&bytes, i)?);
         }
-        println!("{:#?}", authority);
 
         let mut additional = vec![];
         for _ in 0..header.arcount {

src/resolver.rs

@@ -44,11 +44,13 @@ async fn handle_query(message: Message) -> Message {
     response
 }
 
-async fn handle_update(message: Message) -> Message {
+async fn handle_update(message: Message, bytes: &[u8]) -> Message {
     let mut response = message.clone();
 
     // Zone section (question) processing
-    if (message.header.qdcount != 1) || !matches!(message.question[0].qtype, Type::Type(RRType::SOA)) {
+    if (message.header.qdcount != 1)
+        || !matches!(message.question[0].qtype, Type::Type(RRType::SOA))
+    {
         response.header.flags = set_response_flags(response.header.flags, RCODE::FORMERR);
         return response;
     }
@@ -62,23 +64,27 @@ async fn handle_update(message: Message) -> Message {
     }
 
     // Check Prerequisite    TODO: implement this
-    // if message.header.ancount > 0 {
-    //     response.header.flags = set_response_flags(response.header.flags, RCODE::NOTIMP);
-    //     return response;
-    // }
 
-    // Check Requestor Permission
+    //TODO: this code is ugly
-    for rr in &message.additional {
+    let last = message.additional.last();
-        if rr._type == Type::Type(RRType::KEY) {
+    if last.is_some() && last.unwrap()._type == Type::Type(RRType::KEY) {
-            let mut data = message.clone();
+        let rr = last.unwrap();
-            data.header.arcount -= 1;
+        let mut request = bytes[0..bytes.len() - 11 - rr.rdlength as usize].to_vec();
-            data.additional = vec![data.additional[0].clone()];
+        request[11] -= 1; // Decrease arcount
-            let mut i = 0;
+
-            let key = KeyRData::from_bytes(&rr.rdata, &mut i).unwrap();
+        let mut i = 0;
-            let mut bytes = rr.rdata[0..i].to_vec();
+        let key = KeyRData::from_bytes(&rr.rdata, &mut i).unwrap();
-            bytes.extend(Message::to_bytes(data).to_vec());
+
-            let _ = verify(String::from("xander"), &key.signature, &bytes.as_slice());
+        let mut data = rr.rdata[0..i].to_vec();
+        data.extend(request);
+
+        if !verify(&key.signature, &data.as_slice()) {
+            response.header.flags = set_response_flags(response.header.flags, RCODE::NOTAUTH);
+            return response;
         }
+    } else {
+        response.header.flags = set_response_flags(response.header.flags, RCODE::NOTAUTH);
+        return response;
     }
 
     // Update Section Prescan
@@ -93,14 +99,18 @@ async fn handle_update(message: Message) -> Message {
 
         if (rr.class == Class::Class(RRClass::ANY) && (rr.ttl != 0 || rr.rdlength != 0))
             || (rr.class == Class::Class(RRClass::NONE) && rr.ttl != 0)
-            || ![Class::Class(RRClass::NONE), Class::Class(RRClass::ANY), zone.qclass.clone()].contains(&rr.class)
+            || ![
+                Class::Class(RRClass::NONE),
+                Class::Class(RRClass::ANY),
+                zone.qclass.clone(),
+            ]
+            .contains(&rr.class)
         {
             response.header.flags = set_response_flags(response.header.flags, RCODE::FORMERR);
             return response;
         }
     }
 
-    //FIX: with nsupdate delete, I get `dns_request_getresponse: unexpected end of input`
     for rr in message.authority {
         if rr.class == zone.qclass {
             let _ = insert_into_database(rr).await;
@@ -114,13 +124,20 @@ async fn handle_update(message: Message) -> Message {
                     delete_from_database(rr.name, None, Class::Class(RRClass::IN), None).await;
                 }
             } else {
-                delete_from_database(rr.name, Some(rr._type), Class::Class(RRClass::IN), None).await;
+                delete_from_database(rr.name, Some(rr._type), Class::Class(RRClass::IN), None)
+                    .await;
             }
         } else if rr.class == Class::Class(RRClass::NONE) {
             if rr._type == Type::Type(RRType::SOA) {
                 continue;
             }
-            delete_from_database(rr.name, Some(rr._type), Class::Class(RRClass::IN), Some(rr.rdata)).await;
+            delete_from_database(
+                rr.name,
+                Some(rr._type),
+                Class::Class(RRClass::IN),
+                Some(rr.rdata),
+            )
+            .await;
         }
     }
 
@@ -160,7 +177,7 @@ async fn get_response(bytes: &[u8]) -> Message {
         Ok(message) => match get_opcode(&message.header.flags) {
             Ok(opcode) => match opcode {
                 Opcode::QUERY => handle_query(message).await,
-                Opcode::UPDATE => handle_update(message).await,
+                Opcode::UPDATE => handle_update(message, bytes).await,
             },
             Err(_) => todo!(),
         },
@@ -176,8 +193,6 @@ pub async fn resolver_listener_loop(addr: SocketAddr) -> Result<(), Box<dyn Erro
         let socket = socket_shared.clone();
         tokio::spawn(async move {
             let response = get_response(&data[..len]).await;
-            println!("{:?}",Message::to_bytes(Message::from_bytes(&data[..len], &mut 0).unwrap()));
-            println!("{:?}",&data[..len]);
             let _ = socket
                 .send_to(Message::to_bytes(response).as_slice(), addr)
                 .await;