MessageContent

src/crypto.rs

@@ -8,37 +8,43 @@ use rand::rngs::OsRng;
 use alloc::vec::Vec;
 
 
+use crate::message::Sign;
+
+
 #[derive(Debug, PartialEq, Serialize, Deserialize, Clone)]
 pub struct PublicKey {
     pub key: [u8; 32]
 }
 
 
-pub struct KeyPack {
+pub struct Keys {
     pub pair: Keypair,
     csprng: OsRng,
 }
 
-impl KeyPack {
-    pub fn gen() -> KeyPack {
+impl Keys {
+    pub fn gen() -> Keys {
         let mut osrng = OsRng {};
-        KeyPack { pair: Keypair::generate(&mut osrng), csprng: osrng }
+        Keys { pair: Keypair::generate(&mut osrng), csprng: osrng }
     }
 }
 
-impl PublicKey {
-    pub fn verify_sign(&self, msg: &crate::message::Message) -> bool {
-        PK::from_bytes(&self.key).unwrap()
-            .verify(
-                msg.get_hash().as_ref(),
-                &Signature::from_bytes(&msg.clone().sign.into_boxed_slice()).unwrap(),
-            ).is_ok()
+pub fn verify_sign(msg: &crate::message::Message) -> bool {
+    match &msg.clone().sign {
+        Sign::NoSign => true,
+        Sign::Signed(key, sign) => {
+            PK::from_bytes(&key.key).unwrap()
+                .verify(
+                    msg.get_hash().as_ref(),
+                    &Signature::from_bytes(sign.clone().into_boxed_slice().as_ref()).unwrap(),
+                ).is_ok()
+        }
     }
 }
 
-impl KeyPack {
-    pub fn sign(&self, msg: &crate::message::Message) -> Vec<u8> {
-        self.pair.sign(msg.hash.as_ref()).to_bytes().to_vec()
+impl Keys {
+    pub fn sign(&self, content: &Vec<u8>) -> Vec<u8> {
+        self.pair.sign(content.as_ref()).to_bytes().to_vec()
     }
 
     pub fn get_public(&self) -> PublicKey {

src/ironforce.rs

@@ -1,5 +1,5 @@
 use crate::transport::Transport;
-use crate::crypto::{PublicKey, KeyPack};
+use crate::crypto::{PublicKey, Keys};
 use crate::message::{Message, MsgType};
 
 use alloc::vec::Vec;
@@ -7,12 +7,12 @@ use alloc::vec::Vec;
 
 pub struct IronForce {
     transport: Transport,
-    key_pack: KeyPack,
+    key_pack: Keys,
 }
 
 impl IronForce {
     pub fn new() -> IronForce {
-        IronForce { transport: Transport::new(), key_pack: KeyPack::gen() }
+        IronForce { transport: Transport::new(), key_pack: Keys::gen() }
     }
 
     fn is_valid_message(&self, msg: &Message) -> bool {
@@ -33,19 +33,19 @@ impl IronForce {
     }
 
     pub fn send_message_to(&self, to: PublicKey, body: &Vec<u8>) {
-        self.transport.send(&self.new_message(MsgType::ToTarget(to), body))
+        self.transport.send(&self.new_message(MsgType::UniCast(to), body))
     }
 
     fn handle_message(&self, msg: &Message) {
         if self.is_valid_message(msg) {
-            match &msg.msg_type {
+            match &msg.content.msg_type {
                 MsgType::Service => {
-                    self.service_msg(&msg.body)
+                    self.service_msg(&msg.content.body)
                 },
                 MsgType::MultiCast => {
 
                 },
-                MsgType::ToTarget(Target) => {
+                MsgType::UniCast(Target) => {
 
                 }
             }

src/lib.rs

@@ -9,10 +9,10 @@ mod message;
 mod crypto;
 mod error;
 mod way;
+mod tunnel;
 
 #[cfg(test)]
 mod tests {
-
     mod iron_force {
         #[test]
         fn creation_works() {
@@ -23,45 +23,48 @@ mod tests {
 
     mod message {
         use crate::message::{MsgType, Message};
-        use crate::crypto::KeyPack;
+        use crate::crypto::Keys;
         use alloc::vec::Vec;
 
         #[test]
         fn serialization() {
-            let key_pack = KeyPack::gen();
+            let key_pack = Keys::gen();
             let msg = Message::new(
                 MsgType::MultiCast, Vec::<u8>::new(), &key_pack,
             );
             let serialized = &msg.ser();
             let msg2 = Message::deserialize(serialized.to_vec());
-            assert_eq!(msg2.msg_type, MsgType::MultiCast);
+            assert_eq!(msg2.content.msg_type, MsgType::MultiCast);
         }
 
         #[test]
         fn valid_message_creation() {
             let msg = Message::new(
-                MsgType::MultiCast, Vec::<u8>::new(), &KeyPack::gen(),
+                MsgType::MultiCast, Vec::<u8>::new(), &Keys::gen(),
             );
             assert!(&msg.verify());
         }
 
         #[test]
         fn test_invalid_sign() {
-            let key_pack = KeyPack::gen();
+            let key_pack = Keys::gen();
             let mut msg = Message::new(
                 MsgType::MultiCast, Vec::<u8>::new(), &key_pack,
             );
-            msg.sign = [0; 64].to_vec();
+            msg.sign = crate::message::Sign::Signed(key_pack.get_public(), [0; 64].to_vec());
             assert!(!&msg.verify());
             msg.hash = [0; 64].to_vec();
-            msg.sign = key_pack.sign(&msg);
+            msg.sign = crate::message::Sign::Signed(
+                key_pack.get_public(),
+                key_pack.sign(&msg.content_hash)
+            );
             assert!(!&msg.verify());
         }
 
         #[test]
         fn test_hash() {
             let msg = Message::new(
-                MsgType::MultiCast, Vec::<u8>::new(), &crate::crypto::KeyPack::gen(),
+                MsgType::MultiCast, Vec::<u8>::new(), &crate::crypto::Keys::gen(),
             );
             msg.get_hash();
         }

src/message.rs

@@ -1,56 +1,107 @@
-use crate::crypto::{PublicKey, KeyPack};
+use crate::crypto::{PublicKey, Keys, verify_sign};
 use sha2::Digest;
 use serde::{Serialize, Deserialize};
 use alloc::vec::Vec;
 use pinecone::{from_bytes, to_vec};
+use crate::tunnel::Tunnel;
+
+
+fn get_hash(b: &Vec<u8>) -> Vec<u8> {
+    let mut hasher = sha2::Sha256::new();
+    hasher.input(b);
+    hasher.result().to_vec()
+}
 
 
 #[derive(Debug, PartialEq, Serialize, Deserialize, Clone)]
 pub enum MsgType {
-    MultiCast,
-    ToTarget(PublicKey),
-    Service,
+    MultiCast,   // No source, sign and tunnel
+    UniCast(PublicKey /* destination */),   // has source, sign and tunnel
+    Service,   // Has source and sign but no tunnel
 }
 
 #[derive(Debug, PartialEq, Serialize, Deserialize, Clone)]
-pub struct Message {
+pub enum Sign {
+    NoSign,
+    Signed(PublicKey /* source */, Vec<u8> /* sign */)
+}
+
+#[derive(Debug, PartialEq, Serialize, Deserialize, Clone)]
+pub enum MsgTunnel {
+    NoTunnel,
+    Tunnel(Tunnel)
+}
+
+#[derive(Debug, PartialEq, Serialize, Deserialize, Clone)]
+pub struct MessageContent {
+    /// MessageContent is part of the message that is signed
     pub msg_type: MsgType,
     pub body: Vec<u8>,
-    pub source: PublicKey,
-    pub hash: Vec<u8>,
-    pub sign: Vec<u8>,
+}
+
+impl MessageContent {
+    pub fn new(msg_type: MsgType, body: Vec<u8>) -> Self {
+        Self { msg_type, body }
+    }
+
+    pub fn get_hash(&self) -> Vec<u8> {
+        get_hash(&self.ser())
+    }
+
+    pub fn ser(&self) -> Vec<u8> {
+        to_vec(&self).expect("Message content serialization failed")
+    }
+
+    pub fn deserialize(serialized: Vec<u8>) -> Self {
+        from_bytes(&serialized).expect("Message content deserialization failed")
+    }
+}
+
+#[derive(Debug, PartialEq, Serialize, Deserialize, Clone)]
+pub struct Message {
+    pub content: MessageContent,
+    pub content_hash: Vec<u8>,   // hash for signing
+    pub hash: Vec<u8>,    // hash for checking integrity
+    pub sign: Sign,
+    pub tunnel: MsgTunnel
 }
 
 impl Message {
     pub fn get_hash(&self) -> Vec<u8> {
-        let mut hasher = sha2::Sha256::new();
-        let msg2 = Message {
-            msg_type: self.msg_type.clone(),
-            body: self.body.clone(),
-            source: self.source.clone(),
-            hash: Vec::<u8>::new(),
-            sign: Vec::<u8>::new(),
-        };
-        hasher.input(msg2.ser());
-        hasher.result().to_vec()
+        let mut msg2 = self.clone();
+        msg2.hash = Vec::<u8>::new();
+        get_hash(&msg2.ser())
     }
 
-    pub fn new(msg_type: MsgType, body: Vec<u8>, key_pack: &KeyPack) -> Message {
-        let mut msg = Message { msg_type, body, source: key_pack.get_public(), hash: Vec::<u8>::new(), sign: Vec::<u8>::new() };
+    pub fn new(msg_type: MsgType, body: Vec<u8>, key_pack: &Keys) -> Message {
+        let content= MessageContent::new(msg_type.clone(), body);
+        let content_hash = content.get_hash();
+        let mut msg = Message {
+            content,
+            content_hash,
+            hash: Vec::<u8>::new(),
+            sign: Sign::NoSign,
+            tunnel: MsgTunnel::NoTunnel
+        };
+        msg.sign = match msg_type {
+            MsgType::UniCast(_) | MsgType::Service => {
+                Sign::Signed(key_pack.get_public(), key_pack.sign(&msg.content_hash))
+            },
+            MsgType::MultiCast => { Sign::NoSign }
+        };
         msg.hash = msg.get_hash();
-        msg.sign = key_pack.sign(&msg);
         msg
     }
 
     pub fn verify(&self) -> bool {
-        self.hash == self.get_hash() && self.source.verify_sign(&self)
+        self.hash == self.get_hash() && verify_sign(&self)
     }
 
-    pub fn ser(self) -> Vec<u8> {
-        to_vec(&self).expect("Serialization failed")
+    pub fn ser(&self) -> Vec<u8> {
+        to_vec(&self).expect("Message serialization failed")
     }
 
     pub fn deserialize(serialized: Vec<u8>) -> Self {
-        from_bytes(&serialized).expect("Deserialization failed")
+        from_bytes(&serialized).expect("Message deserialization failed")
     }
 }

src/transport.rs

@@ -28,7 +28,7 @@ impl Transport {
     pub fn receive(&self) -> Message {
         Message::new(MsgType::Service,
                      Vec::<u8>::new(),
-                     &crate::crypto::KeyPack::gen())
+                     &crate::crypto::Keys::gen())
     }
 }
 
@@ -47,6 +47,6 @@ impl Transport {
     pub fn receive(&self) -> Message {
         Message::new(MsgType::Service,
                      Vec::<u8>::new(),
-                     &crate::crypto::KeyPack::gen())
+                     &crate::crypto::Keys::gen())
     }
 }

src/tunnel.rs

@@ -0,0 +1,8 @@
+use crate::crypto::PublicKey;
+use alloc::vec::Vec;
+use serde::{Serialize, Deserialize};
+
+#[derive(Debug, PartialEq, Serialize, Deserialize, Clone)]
+pub struct Tunnel {
+    nodes: Vec<PublicKey>
+}