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Diffstat (limited to 'src/noise/messages.rs')
-rw-r--r-- | src/noise/messages.rs | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/src/noise/messages.rs b/src/noise/messages.rs new file mode 100644 index 0000000..dca49b9 --- /dev/null +++ b/src/noise/messages.rs @@ -0,0 +1,208 @@ +#[cfg(test)] +use hex; + +#[cfg(test)] +use std::fmt; + +use byteorder::LittleEndian; +use zerocopy::byteorder::U32; +use zerocopy::{AsBytes, ByteSlice, FromBytes, LayoutVerified}; + +use super::types::*; + +const SIZE_TAG: usize = 16; +const SIZE_X25519_POINT: usize = 32; +const SIZE_TIMESTAMP: usize = 12; + +pub const TYPE_INITIATION: u8 = 1; +pub const TYPE_RESPONSE: u8 = 2; + +#[repr(C)] +#[derive(Copy, Clone, FromBytes, AsBytes)] +pub struct Initiation { + f_type: U32<LittleEndian>, + pub f_sender: U32<LittleEndian>, + pub f_ephemeral: [u8; SIZE_X25519_POINT], + pub f_static: [u8; SIZE_X25519_POINT], + pub f_static_tag: [u8; SIZE_TAG], + pub f_timestamp: [u8; SIZE_TIMESTAMP], + pub f_timestamp_tag: [u8; SIZE_TAG], +} + +impl Default for Initiation { + fn default() -> Self { + Self { + f_type: <U32<LittleEndian>>::new(TYPE_INITIATION as u32), + + f_sender: <U32<LittleEndian>>::ZERO, + f_ephemeral: [0u8; SIZE_X25519_POINT], + f_static: [0u8; SIZE_X25519_POINT], + f_static_tag: [0u8; SIZE_TAG], + f_timestamp: [0u8; SIZE_TIMESTAMP], + f_timestamp_tag: [0u8; SIZE_TAG], + } + } +} + +impl Initiation { + pub fn parse<B: ByteSlice>(bytes: B) -> Result<LayoutVerified<B, Self>, HandshakeError> { + let msg: LayoutVerified<B, Self> = + LayoutVerified::new(bytes).ok_or(HandshakeError::InvalidMessageFormat)?; + + if msg.f_type.get() != (TYPE_INITIATION as u32) { + return Err(HandshakeError::InvalidMessageFormat); + } + + Ok(msg) + } +} + +#[cfg(test)] +impl fmt::Debug for Initiation { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + write!(f, + "MessageInitiation {{ type = {}, sender = {}, ephemeral = {}, static = {}|{}, timestamp = {}|{} }}", + self.f_type.get(), + self.f_sender.get(), + hex::encode(self.f_ephemeral), + hex::encode(self.f_static), + hex::encode(self.f_static_tag), + hex::encode(self.f_timestamp), + hex::encode(self.f_timestamp_tag) + ) + } +} + +#[cfg(test)] +impl PartialEq for Initiation { + fn eq(&self, other: &Self) -> bool { + self.f_type.get() == other.f_type.get() + && self.f_sender.get() == other.f_sender.get() + && self.f_ephemeral[..] == other.f_ephemeral[..] + && self.f_static[..] == other.f_static[..] + && self.f_static_tag[..] == other.f_static_tag[..] + && self.f_timestamp[..] == other.f_timestamp + && self.f_timestamp_tag[..] == other.f_timestamp_tag + } +} + +#[cfg(test)] +impl Eq for Initiation {} + +#[repr(C)] +#[derive(Copy, Clone, FromBytes, AsBytes)] +pub struct Response { + f_type: U32<LittleEndian>, + pub f_sender: U32<LittleEndian>, + pub f_receiver: U32<LittleEndian>, + pub f_ephemeral: [u8; SIZE_X25519_POINT], + pub f_empty_tag: [u8; SIZE_TAG], +} + +impl Response { + pub fn parse<B: ByteSlice>(bytes: B) -> Result<LayoutVerified<B, Self>, HandshakeError> { + let msg: LayoutVerified<B, Self> = + LayoutVerified::new(bytes).ok_or(HandshakeError::InvalidMessageFormat)?; + + if msg.f_type.get() != (TYPE_RESPONSE as u32) { + return Err(HandshakeError::InvalidMessageFormat); + } + + Ok(msg) + } +} + +impl Default for Response { + fn default() -> Self { + Self { + f_type: <U32<LittleEndian>>::new(TYPE_RESPONSE as u32), + f_sender: <U32<LittleEndian>>::ZERO, + f_receiver: <U32<LittleEndian>>::ZERO, + f_ephemeral: [0u8; SIZE_X25519_POINT], + f_empty_tag: [0u8; SIZE_TAG], + } + } +} + +#[cfg(test)] +impl fmt::Debug for Response { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + write!(f, + "MessageResponse {{ type = {}, sender = {}, receiver = {}, ephemeral = {}, empty = |{} }}", + self.f_type, + self.f_sender, + self.f_receiver, + hex::encode(self.f_ephemeral), + hex::encode(self.f_empty_tag) + ) + } +} + +#[cfg(test)] +impl PartialEq for Response { + fn eq(&self, other: &Self) -> bool { + self.f_type == other.f_type + && self.f_sender == other.f_sender + && self.f_receiver == other.f_receiver + && self.f_ephemeral == other.f_ephemeral + && self.f_empty_tag == other.f_empty_tag + } +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn message_response_identity() { + let mut msg: Response = Default::default(); + + msg.f_sender.set(146252); + msg.f_receiver.set(554442); + msg.f_ephemeral = [ + 0xc1, 0x66, 0x0a, 0x0c, 0xdc, 0x0f, 0x6c, 0x51, 0x0f, 0xc2, 0xcc, 0x51, 0x52, 0x0c, + 0xde, 0x1e, 0xf7, 0xf1, 0xca, 0x90, 0x86, 0x72, 0xad, 0x67, 0xea, 0x89, 0x45, 0x44, + 0x13, 0x56, 0x52, 0x1f, + ]; + msg.f_empty_tag = [ + 0x60, 0x0e, 0x1e, 0x95, 0x41, 0x6b, 0x52, 0x05, 0xa2, 0x09, 0xe1, 0xbf, 0x40, 0x05, + 0x2f, 0xde, + ]; + + let buf: Vec<u8> = msg.as_bytes().to_vec(); + let msg_p = Response::parse(&buf[..]).unwrap(); + assert_eq!(msg, *msg_p.into_ref()); + } + + #[test] + fn message_initiate_identity() { + let mut msg: Initiation = Default::default(); + + msg.f_sender.set(575757); + msg.f_ephemeral = [ + 0xc1, 0x66, 0x0a, 0x0c, 0xdc, 0x0f, 0x6c, 0x51, 0x0f, 0xc2, 0xcc, 0x51, 0x52, 0x0c, + 0xde, 0x1e, 0xf7, 0xf1, 0xca, 0x90, 0x86, 0x72, 0xad, 0x67, 0xea, 0x89, 0x45, 0x44, + 0x13, 0x56, 0x52, 0x1f, + ]; + msg.f_static = [ + 0xdc, 0x33, 0x90, 0x15, 0x8f, 0x82, 0x3e, 0x06, 0x44, 0xa0, 0xde, 0x4c, 0x15, 0x6c, + 0x5d, 0xa4, 0x65, 0x99, 0xf6, 0x6c, 0xa1, 0x14, 0x77, 0xf9, 0xeb, 0x6a, 0xec, 0xc3, + 0x3c, 0xda, 0x47, 0xe1, + ]; + msg.f_static_tag = [ + 0x45, 0xac, 0x8d, 0x43, 0xea, 0x1b, 0x2f, 0x02, 0x45, 0x5d, 0x86, 0x37, 0xee, 0x83, + 0x6b, 0x42, + ]; + msg.f_timestamp = [ + 0x4f, 0x1c, 0x60, 0xec, 0x0e, 0xf6, 0x36, 0xf0, 0x78, 0x28, 0x57, 0x42, + ]; + msg.f_timestamp_tag = [ + 0x60, 0x0e, 0x1e, 0x95, 0x41, 0x6b, 0x52, 0x05, 0xa2, 0x09, 0xe1, 0xbf, 0x40, 0x05, + 0x2f, 0xde, + ]; + + let buf: Vec<u8> = msg.as_bytes().to_vec(); + let msg_p = Initiation::parse(&buf[..]).unwrap(); + assert_eq!(msg, *msg_p.into_ref()); + } +} |