src/connection/handshake/dirsync/mod.rs

@@ -0,0 +1,77 @@
+//! Directory synchronized handshake
+//! 1-RTT connection
+//!
+//! The simplest, fastest handshake supported by Fenrir
+//! Downside: It does not offer protection from DDos,
+//! no perfect forward secrecy
+//!
+//! To grant a form of perfect forward secrecy, the server should periodically
+//! change the DNSSEC public/private keys
+
+use crate::enc::{
+    sym::{NonceLen, TagLen},
+    Random,
+};
+
+pub mod req;
+pub mod resp;
+
+// TODO: merge with crate::enc::sym::Nonce
+/// random nonce
+#[derive(Debug, Clone, Copy, PartialEq)]
+pub struct Nonce(pub(crate) [u8; 16]);
+
+impl Nonce {
+    /// Create a new random Nonce
+    pub fn new(rnd: &Random) -> Self {
+        use ::core::mem::MaybeUninit;
+        let mut out: MaybeUninit<[u8; 16]>;
+        #[allow(unsafe_code)]
+        unsafe {
+            out = MaybeUninit::uninit();
+            let _ = rnd.fill(out.assume_init_mut());
+            Self(out.assume_init())
+        }
+    }
+    /// Length of the serialized Nonce
+    pub const fn len() -> usize {
+        16
+    }
+}
+impl From<&[u8; 16]> for Nonce {
+    fn from(raw: &[u8; 16]) -> Self {
+        Self(raw.clone())
+    }
+}
+
+/// Parsed handshake
+#[derive(Debug, Clone, PartialEq)]
+pub enum DirSync {
+    /// Directory synchronized handshake: client request
+    Req(req::Req),
+    /// Directory synchronized handshake: server response
+    Resp(resp::Resp),
+}
+
+impl DirSync {
+    /// actual length of the dirsync handshake data
+    pub fn len(&self, head_len: NonceLen, tag_len: TagLen) -> usize {
+        match self {
+            DirSync::Req(req) => req.len(),
+            DirSync::Resp(resp) => resp.len(head_len, tag_len),
+        }
+    }
+    /// Serialize into raw bytes
+    /// NOTE: assumes that there is exactly asa much buffer as needed
+    pub fn serialize(
+        &self,
+        head_len: NonceLen,
+        tag_len: TagLen,
+        out: &mut [u8],
+    ) {
+        match self {
+            DirSync::Req(req) => req.serialize(head_len, tag_len, out),
+            DirSync::Resp(resp) => resp.serialize(head_len, tag_len, out),
+        }
+    }
+}

src/connection/handshake/dirsync/req.rs

@@ -1,85 +1,22 @@
-//! Directory synchronized handshake
+//! Directory synchronized handshake, Request parsing
-//! 1-RTT connection
-//!
-//! The simplest, fastest handshake supported by Fenrir
-//! Downside: It does not offer protection from DDos,
-//! no perfect forward secrecy
-//!
-//! To grant a form of perfect forward secrecy, the server should periodically
-//! change the DNSSEC public/private keys
 
-use super::Error;
 use crate::{
     auth,
-    connection::{handshake, ProtocolVersion, ID},
+    connection::{
+        handshake::{
+            self,
+            dirsync::{DirSync, Nonce},
+            Error,
+        },
+        ProtocolVersion, ID,
+    },
     enc::{
         asym::{ExchangePubKey, KeyExchangeKind, KeyID},
         hkdf,
         sym::{self, NonceLen, TagLen},
-        Random, Secret,
     },
 };
 
-// TODO: merge with crate::enc::sym::Nonce
-/// random nonce
-#[derive(Debug, Clone, Copy, PartialEq)]
-pub struct Nonce(pub(crate) [u8; 16]);
-
-impl Nonce {
-    /// Create a new random Nonce
-    pub fn new(rnd: &Random) -> Self {
-        use ::core::mem::MaybeUninit;
-        let mut out: MaybeUninit<[u8; 16]>;
-        #[allow(unsafe_code)]
-        unsafe {
-            out = MaybeUninit::uninit();
-            let _ = rnd.fill(out.assume_init_mut());
-            Self(out.assume_init())
-        }
-    }
-    /// Length of the serialized Nonce
-    pub const fn len() -> usize {
-        16
-    }
-}
-impl From<&[u8; 16]> for Nonce {
-    fn from(raw: &[u8; 16]) -> Self {
-        Self(raw.clone())
-    }
-}
-
-/// Parsed handshake
-#[derive(Debug, Clone, PartialEq)]
-pub enum DirSync {
-    /// Directory synchronized handshake: client request
-    Req(Req),
-    /// Directory synchronized handshake: server response
-    Resp(Resp),
-}
-
-impl DirSync {
-    /// actual length of the dirsync handshake data
-    pub fn len(&self, head_len: NonceLen, tag_len: TagLen) -> usize {
-        match self {
-            DirSync::Req(req) => req.len(),
-            DirSync::Resp(resp) => resp.len(head_len, tag_len),
-        }
-    }
-    /// Serialize into raw bytes
-    /// NOTE: assumes that there is exactly asa much buffer as needed
-    pub fn serialize(
-        &self,
-        head_len: NonceLen,
-        tag_len: TagLen,
-        out: &mut [u8],
-    ) {
-        match self {
-            DirSync::Req(req) => req.serialize(head_len, tag_len, out),
-            DirSync::Resp(resp) => resp.serialize(head_len, tag_len, out),
-        }
-    }
-}
-
 /// Client request of a directory synchronized handshake
 #[derive(Debug, Clone, PartialEq)]
 pub struct Req {
@@ -94,7 +31,7 @@ pub struct Req {
     /// Client ephemeral public key used for key exchanges
     pub exchange_key: ExchangePubKey,
     /// encrypted data
-    pub data: ReqState,
+    pub data: State,
     // SECURITY: TODO: Add padding to min: 1200 bytes
     //   to avoid amplification attaks
     //   also: 1200 < 1280 to allow better vpn compatibility
@@ -119,8 +56,8 @@ impl Req {
         tag_len: TagLen,
     ) -> usize {
         match &self.data {
-            ReqState::ClearText(data) => data.len() + head_len.0 + tag_len.0,
+            State::ClearText(data) => data.len() + head_len.0 + tag_len.0,
-            ReqState::CipherText(length) => *length,
+            State::CipherText(length) => *length,
         }
     }
     /// actual length of the directory synchronized request
@@ -150,7 +87,7 @@ impl Req {
         let written_next = 5 + key_len;
         self.exchange_key.serialize_into(&mut out[5..written_next]);
         let written = written_next;
-        if let ReqState::ClearText(data) = &self.data {
+        if let State::ClearText(data) = &self.data {
             let from = written + head_len.0;
             let to = out.len() - tag_len.0;
             data.serialize(&mut out[from..to]);
@@ -190,7 +127,7 @@ impl handshake::Parsing for Req {
                 Ok(exchange_key) => exchange_key,
                 Err(e) => return Err(e.into()),
             };
-        let data = ReqState::CipherText(raw.len() - (CURR_SIZE + len));
+        let data = State::CipherText(raw.len() - (CURR_SIZE + len));
         Ok(handshake::Data::DirSync(DirSync::Req(Self {
             key_id,
             exchange,
@@ -204,18 +141,18 @@ impl handshake::Parsing for Req {
 
 /// Quick way to avoid mixing cipher and clear text
 #[derive(Debug, Clone, PartialEq)]
-pub enum ReqState {
+pub enum State {
     /// Data is still encrytped, we only keep the length
     CipherText(usize),
     /// Client data, decrypted and parsed
-    ClearText(ReqData),
+    ClearText(Data),
 }
-impl ReqState {
+impl State {
     /// The length of the data
     pub fn len(&self) -> usize {
         match self {
-            ReqState::CipherText(len) => *len,
+            State::CipherText(len) => *len,
-            ReqState::ClearText(data) => data.len(),
+            State::ClearText(data) => data.len(),
         }
     }
     /// parse the cleartext
@@ -224,19 +161,19 @@ impl ReqState {
         raw: &[u8],
     ) -> Result<(), Error> {
         let clear = match self {
-            ReqState::CipherText(len) => {
+            State::CipherText(len) => {
                 assert!(
                     *len > raw.len(),
-                    "DirSync::ReqState::CipherText length mismatch"
+                    "DirSync::State::CipherText length mismatch"
                 );
-                match ReqData::deserialize(raw) {
+                match Data::deserialize(raw) {
                     Ok(clear) => clear,
                     Err(e) => return Err(e),
                 }
             }
             _ => return Err(Error::Parsing),
         };
-        *self = ReqState::ClearText(clear);
+        *self = State::ClearText(clear);
         Ok(())
     }
 }
@@ -321,7 +258,7 @@ impl AuthInfo {
 
 /// Decrypted request data
 #[derive(Debug, Clone, PartialEq)]
-pub struct ReqData {
+pub struct Data {
     /// Random nonce, the client can use this to track multiple key exchanges
     pub nonce: Nonce,
     /// Client key id so the client can use and rotate keys
@@ -331,7 +268,7 @@ pub struct ReqData {
     /// Authentication data
     pub auth: AuthInfo,
 }
-impl ReqData {
+impl Data {
     /// actual length of the request data
     pub fn len(&self) -> usize {
         Nonce::len() + KeyID::len() + ID::len() + self.auth.len()
@@ -383,177 +320,3 @@ impl ReqData {
         })
     }
 }
-
-/// Quick way to avoid mixing cipher and clear text
-#[derive(Debug, Clone, PartialEq)]
-pub enum RespState {
-    /// Server data, still in ciphertext
-    CipherText(usize),
-    /// Parsed, cleartext server data
-    ClearText(RespData),
-}
-impl RespState {
-    /// The length of the data
-    pub fn len(&self) -> usize {
-        match self {
-            RespState::CipherText(len) => *len,
-            RespState::ClearText(_) => RespData::len(),
-        }
-    }
-    /// parse the cleartext
-    pub fn deserialize_as_cleartext(
-        &mut self,
-        raw: &[u8],
-    ) -> Result<(), Error> {
-        let clear = match self {
-            RespState::CipherText(len) => {
-                assert!(
-                    *len > raw.len(),
-                    "DirSync::RespState::CipherText length mismatch"
-                );
-                match RespData::deserialize(raw) {
-                    Ok(clear) => clear,
-                    Err(e) => return Err(e),
-                }
-            }
-            _ => return Err(Error::Parsing),
-        };
-        *self = RespState::ClearText(clear);
-        Ok(())
-    }
-    /// Serialize the still cleartext data
-    pub fn serialize(&self, out: &mut [u8]) {
-        if let RespState::ClearText(clear) = &self {
-            clear.serialize(out);
-        }
-    }
-}
-
-/// Server response in a directory synchronized handshake
-#[derive(Debug, Clone, PartialEq)]
-pub struct Resp {
-    /// Tells the client with which key the exchange was done
-    pub client_key_id: KeyID,
-    /// actual response data, might be encrypted
-    pub data: RespState,
-}
-
-impl handshake::Parsing for Resp {
-    fn deserialize(raw: &[u8]) -> Result<handshake::Data, Error> {
-        const MIN_PKT_LEN: usize = 68;
-        if raw.len() < MIN_PKT_LEN {
-            return Err(Error::NotEnoughData);
-        }
-        let client_key_id: KeyID =
-            KeyID(u16::from_le_bytes(raw[0..KeyID::len()].try_into().unwrap()));
-        Ok(handshake::Data::DirSync(DirSync::Resp(Self {
-            client_key_id,
-            data: RespState::CipherText(raw[KeyID::len()..].len()),
-        })))
-    }
-}
-
-impl Resp {
-    /// return the offset of the encrypted data
-    /// NOTE: starts from the beginning of the fenrir packet
-    pub fn encrypted_offset(&self) -> usize {
-        ProtocolVersion::len() + handshake::ID::len() + KeyID::len()
-    }
-    /// return the total length of the cleartext data
-    pub fn encrypted_length(
-        &self,
-        head_len: NonceLen,
-        tag_len: TagLen,
-    ) -> usize {
-        match &self.data {
-            RespState::ClearText(_data) => {
-                RespData::len() + head_len.0 + tag_len.0
-            }
-            RespState::CipherText(len) => *len,
-        }
-    }
-    /// Total length of the response handshake
-    pub fn len(&self, head_len: NonceLen, tag_len: TagLen) -> usize {
-        KeyID::len() + head_len.0 + self.data.len() + tag_len.0
-    }
-    /// Serialize into raw bytes
-    /// NOTE: assumes that there is exactly as much buffer as needed
-    pub fn serialize(
-        &self,
-        head_len: NonceLen,
-        _tag_len: TagLen,
-        out: &mut [u8],
-    ) {
-        out[0..KeyID::len()]
-            .copy_from_slice(&self.client_key_id.0.to_le_bytes());
-        let start_data = KeyID::len() + head_len.0;
-        let end_data = start_data + self.data.len();
-        self.data.serialize(&mut out[start_data..end_data]);
-    }
-}
-
-/// Decrypted response data
-#[derive(Debug, Clone, PartialEq)]
-pub struct RespData {
-    /// Client nonce, copied from the request
-    pub client_nonce: Nonce,
-    /// Server Connection ID
-    pub id: ID,
-    /// Service Connection ID
-    pub service_connection_id: ID,
-    /// Service encryption key
-    pub service_key: Secret,
-}
-
-impl RespData {
-    /// Return the expected length for buffer allocation
-    pub fn len() -> usize {
-        Nonce::len() + ID::len() + ID::len() + Secret::len()
-    }
-    /// Serialize the data into a buffer
-    /// NOTE: assumes that there is exactly asa much buffer as needed
-    pub fn serialize(&self, out: &mut [u8]) {
-        let mut start = 0;
-        let mut end = Nonce::len();
-        out[start..end].copy_from_slice(&self.client_nonce.0);
-        start = end;
-        end = end + ID::len();
-        self.id.serialize(&mut out[start..end]);
-        start = end;
-        end = end + ID::len();
-        self.service_connection_id.serialize(&mut out[start..end]);
-        start = end;
-        end = end + Secret::len();
-        out[start..end].copy_from_slice(self.service_key.as_ref());
-    }
-    /// Parse the cleartext raw data
-    pub fn deserialize(raw: &[u8]) -> Result<Self, Error> {
-        let raw_sized: &[u8; 16] = raw[..Nonce::len()].try_into().unwrap();
-        let client_nonce: Nonce = raw_sized.into();
-        let end = Nonce::len() + ID::len();
-        let id: ID =
-            u64::from_le_bytes(raw[Nonce::len()..end].try_into().unwrap())
-                .into();
-        if id.is_handshake() {
-            return Err(Error::Parsing);
-        }
-        let parsed = end;
-        let end = parsed + ID::len();
-        let service_connection_id: ID =
-            u64::from_le_bytes(raw[parsed..end].try_into().unwrap()).into();
-        if service_connection_id.is_handshake() {
-            return Err(Error::Parsing);
-        }
-        let parsed = end;
-        let end = parsed + Secret::len();
-        let raw_secret: &[u8; 32] = raw[parsed..end].try_into().unwrap();
-        let service_key = raw_secret.into();
-
-        Ok(Self {
-            client_nonce,
-            id,
-            service_connection_id,
-            service_key,
-        })
-    }
-}

src/connection/handshake/dirsync/resp.rs

@@ -0,0 +1,189 @@
+//! Directory synchronized handshake, Response parsing
+
+use crate::{
+    connection::{
+        handshake::{
+            self,
+            dirsync::{DirSync, Nonce},
+            Error,
+        },
+        ProtocolVersion, ID,
+    },
+    enc::{
+        asym::KeyID,
+        sym::{NonceLen, TagLen},
+        Secret,
+    },
+};
+
+/// Server response in a directory synchronized handshake
+#[derive(Debug, Clone, PartialEq)]
+pub struct Resp {
+    /// Tells the client with which key the exchange was done
+    pub client_key_id: KeyID,
+    /// actual response data, might be encrypted
+    pub data: State,
+}
+
+impl handshake::Parsing for Resp {
+    fn deserialize(raw: &[u8]) -> Result<handshake::Data, Error> {
+        const MIN_PKT_LEN: usize = 68;
+        if raw.len() < MIN_PKT_LEN {
+            return Err(Error::NotEnoughData);
+        }
+        let client_key_id: KeyID =
+            KeyID(u16::from_le_bytes(raw[0..KeyID::len()].try_into().unwrap()));
+        Ok(handshake::Data::DirSync(DirSync::Resp(Self {
+            client_key_id,
+            data: State::CipherText(raw[KeyID::len()..].len()),
+        })))
+    }
+}
+
+impl Resp {
+    /// return the offset of the encrypted data
+    /// NOTE: starts from the beginning of the fenrir packet
+    pub fn encrypted_offset(&self) -> usize {
+        ProtocolVersion::len() + handshake::ID::len() + KeyID::len()
+    }
+    /// return the total length of the cleartext data
+    pub fn encrypted_length(
+        &self,
+        head_len: NonceLen,
+        tag_len: TagLen,
+    ) -> usize {
+        match &self.data {
+            State::ClearText(_data) => Data::len() + head_len.0 + tag_len.0,
+            State::CipherText(len) => *len,
+        }
+    }
+    /// Total length of the response handshake
+    pub fn len(&self, head_len: NonceLen, tag_len: TagLen) -> usize {
+        KeyID::len() + head_len.0 + self.data.len() + tag_len.0
+    }
+    /// Serialize into raw bytes
+    /// NOTE: assumes that there is exactly as much buffer as needed
+    pub fn serialize(
+        &self,
+        head_len: NonceLen,
+        _tag_len: TagLen,
+        out: &mut [u8],
+    ) {
+        out[0..KeyID::len()]
+            .copy_from_slice(&self.client_key_id.0.to_le_bytes());
+        let start_data = KeyID::len() + head_len.0;
+        let end_data = start_data + self.data.len();
+        self.data.serialize(&mut out[start_data..end_data]);
+    }
+}
+
+/// Quick way to avoid mixing cipher and clear text
+#[derive(Debug, Clone, PartialEq)]
+pub enum State {
+    /// Server data, still in ciphertext
+    CipherText(usize),
+    /// Parsed, cleartext server data
+    ClearText(Data),
+}
+impl State {
+    /// The length of the data
+    pub fn len(&self) -> usize {
+        match self {
+            State::CipherText(len) => *len,
+            State::ClearText(_) => Data::len(),
+        }
+    }
+    /// parse the cleartext
+    pub fn deserialize_as_cleartext(
+        &mut self,
+        raw: &[u8],
+    ) -> Result<(), Error> {
+        let clear = match self {
+            State::CipherText(len) => {
+                assert!(
+                    *len > raw.len(),
+                    "DirSync::State::CipherText length mismatch"
+                );
+                match Data::deserialize(raw) {
+                    Ok(clear) => clear,
+                    Err(e) => return Err(e),
+                }
+            }
+            _ => return Err(Error::Parsing),
+        };
+        *self = State::ClearText(clear);
+        Ok(())
+    }
+    /// Serialize the still cleartext data
+    pub fn serialize(&self, out: &mut [u8]) {
+        if let State::ClearText(clear) = &self {
+            clear.serialize(out);
+        }
+    }
+}
+
+/// Decrypted response data
+#[derive(Debug, Clone, PartialEq)]
+pub struct Data {
+    /// Client nonce, copied from the request
+    pub client_nonce: Nonce,
+    /// Server Connection ID
+    pub id: ID,
+    /// Service Connection ID
+    pub service_connection_id: ID,
+    /// Service encryption key
+    pub service_key: Secret,
+}
+
+impl Data {
+    /// Return the expected length for buffer allocation
+    pub fn len() -> usize {
+        Nonce::len() + ID::len() + ID::len() + Secret::len()
+    }
+    /// Serialize the data into a buffer
+    /// NOTE: assumes that there is exactly asa much buffer as needed
+    pub fn serialize(&self, out: &mut [u8]) {
+        let mut start = 0;
+        let mut end = Nonce::len();
+        out[start..end].copy_from_slice(&self.client_nonce.0);
+        start = end;
+        end = end + ID::len();
+        self.id.serialize(&mut out[start..end]);
+        start = end;
+        end = end + ID::len();
+        self.service_connection_id.serialize(&mut out[start..end]);
+        start = end;
+        end = end + Secret::len();
+        out[start..end].copy_from_slice(self.service_key.as_ref());
+    }
+    /// Parse the cleartext raw data
+    pub fn deserialize(raw: &[u8]) -> Result<Self, Error> {
+        let raw_sized: &[u8; 16] = raw[..Nonce::len()].try_into().unwrap();
+        let client_nonce: Nonce = raw_sized.into();
+        let end = Nonce::len() + ID::len();
+        let id: ID =
+            u64::from_le_bytes(raw[Nonce::len()..end].try_into().unwrap())
+                .into();
+        if id.is_handshake() {
+            return Err(Error::Parsing);
+        }
+        let parsed = end;
+        let end = parsed + ID::len();
+        let service_connection_id: ID =
+            u64::from_le_bytes(raw[parsed..end].try_into().unwrap()).into();
+        if service_connection_id.is_handshake() {
+            return Err(Error::Parsing);
+        }
+        let parsed = end;
+        let end = parsed + Secret::len();
+        let raw_secret: &[u8; 32] = raw[parsed..end].try_into().unwrap();
+        let service_key = raw_secret.into();
+
+        Ok(Self {
+            client_nonce,
+            id,
+            service_connection_id,
+            service_key,
+        })
+    }
+}

src/connection/handshake/mod.rs

@@ -166,9 +166,11 @@ impl Handshake {
             None => return Err(Error::Parsing),
         };
         let data = match handshake_kind {
-            HandshakeKind::DirSyncReq => dirsync::Req::deserialize(&raw[2..])?,
+            HandshakeKind::DirSyncReq => {
+                dirsync::req::Req::deserialize(&raw[2..])?
+            }
             HandshakeKind::DirSyncResp => {
-                dirsync::Resp::deserialize(&raw[2..])?
+                dirsync::resp::Resp::deserialize(&raw[2..])?
             }
         };
         Ok(Self {

src/connection/handshake/tests.rs

@@ -22,11 +22,11 @@ fn test_handshake_dirsync_req() {
             }
         };
 
-    let data = dirsync::ReqState::ClearText(dirsync::ReqData {
+    let data = dirsync::req::State::ClearText(dirsync::req::Data {
         nonce: dirsync::Nonce::new(&rand),
         client_key_id: KeyID(2424),
         id: ID::ID(::core::num::NonZeroU64::new(424242).unwrap()),
-        auth: dirsync::AuthInfo {
+        auth: dirsync::req::AuthInfo {
             user: auth::UserID::new(&rand),
             token: auth::Token::new_anonymous(&rand),
             service_id: auth::SERVICEID_AUTH,
@@ -35,7 +35,7 @@ fn test_handshake_dirsync_req() {
     });
 
     let h_req = Handshake::new(handshake::Data::DirSync(
-        dirsync::DirSync::Req(dirsync::Req {
+        dirsync::DirSync::Req(dirsync::req::Req {
             key_id: KeyID(4224),
             exchange: enc::asym::KeyExchangeKind::X25519DiffieHellman,
             hkdf: enc::hkdf::Kind::Sha3,
@@ -81,7 +81,7 @@ fn test_handshake_dirsync_reqsp() {
 
     let service_key = enc::Secret::new_rand(&rand);
 
-    let data = dirsync::RespState::ClearText(dirsync::RespData {
+    let data = dirsync::resp::State::ClearText(dirsync::resp::Data {
         client_nonce: dirsync::Nonce::new(&rand),
         id: ID::ID(::core::num::NonZeroU64::new(424242).unwrap()),
         service_connection_id: ID::ID(
@@ -91,7 +91,7 @@ fn test_handshake_dirsync_reqsp() {
     });
 
     let h_resp = Handshake::new(handshake::Data::DirSync(
-        dirsync::DirSync::Resp(dirsync::Resp {
+        dirsync::DirSync::Resp(dirsync::resp::Resp {
             client_key_id: KeyID(4444),
             data,
         }),

src/enc/tests.rs

@@ -53,7 +53,7 @@ fn test_encrypt_decrypt() {
 
     let service_key = enc::Secret::new_rand(&rand);
 
-    let data = dirsync::RespState::ClearText(dirsync::RespData {
+    let data = dirsync::resp::State::ClearText(dirsync::resp::Data {
         client_nonce: dirsync::Nonce::new(&rand),
         id: ID::ID(::core::num::NonZeroU64::new(424242).unwrap()),
         service_connection_id: ID::ID(
@@ -62,7 +62,7 @@ fn test_encrypt_decrypt() {
         service_key,
     });
 
-    let resp = dirsync::Resp {
+    let resp = dirsync::resp::Resp {
         client_key_id: KeyID(4444),
         data,
     };

src/inner/worker.rs

@@ -326,25 +326,25 @@ impl Worker {
                     };
 
                     // build request
-                    let auth_info = dirsync::AuthInfo {
+                    let auth_info = dirsync::req::AuthInfo {
                         user: UserID::new_anonymous(),
                         token: Token::new_anonymous(&self.rand),
                         service_id: conn_info.service_id,
                         domain: conn_info.domain,
                     };
-                    let req_data = dirsync::ReqData {
+                    let req_data = dirsync::req::Data {
                         nonce: dirsync::Nonce::new(&self.rand),
                         client_key_id,
                         id: auth_recv_id.0, //FIXME: is zero
                         auth: auth_info,
                     };
-                    let req = dirsync::Req {
+                    let req = dirsync::req::Req {
                         key_id: key.0,
                         exchange,
                         hkdf: hkdf_selected,
                         cipher: cipher_selected,
                         exchange_key: pub_key,
-                        data: dirsync::ReqState::ClearText(req_data),
+                        data: dirsync::req::State::ClearText(req_data),
                     };
                     let encrypt_start =
                         connection::ID::len() + req.encrypted_offset();
@@ -459,9 +459,8 @@ impl Worker {
                         ::tracing::error!("AuthInfo on non DS::Req");
                         return;
                     }
-                    use dirsync::ReqState;
                     let req_data = match req.data {
-                        ReqState::ClearText(req_data) => req_data,
+                        dirsync::req::State::ClearText(req_data) => req_data,
                         _ => {
                             ::tracing::error!("AuthNeeded: expected ClearText");
                             assert!(false, "AuthNeeded: unreachable");
@@ -527,7 +526,7 @@ impl Worker {
                     let auth_id_recv = self.connections.reserve_first();
                     auth_conn.id_recv = auth_id_recv;
 
-                    let resp_data = dirsync::RespData {
+                    let resp_data = dirsync::resp::Data {
                         client_nonce: req_data.nonce,
                         id: auth_conn.id_recv.0,
                         service_connection_id: srv_conn_id,
@@ -537,10 +536,9 @@ impl Worker {
                     // no aad for now
                     let aad = AAD(&mut []);
 
-                    use dirsync::RespState;
+                    let resp = dirsync::resp::Resp {
-                    let resp = dirsync::Resp {
                         client_key_id: req_data.client_key_id,
-                        data: RespState::ClearText(resp_data),
+                        data: dirsync::resp::State::ClearText(resp_data),
                     };
                     let encrypt_from =
                         connection::ID::len() + resp.encrypted_offset();
@@ -579,7 +577,8 @@ impl Worker {
                     }
                     // track connection
                     let resp_data;
-                    if let dirsync::RespState::ClearText(r_data) = ds_resp.data
+                    if let dirsync::resp::State::ClearText(r_data) =
+                        ds_resp.data
                     {
                         resp_data = r_data;
                     } else {