commit 7d9739244d504ae5431f3084f6acc2c92f7bdb9b
Author: c0repwn3r <core@coredoes.dev>
Date:   Wed Jan 25 18:24:51 2023 -0500

    initial commit

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..1de5659
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+target
\ No newline at end of file
diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..13566b8
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/libsptprp/src/cryptography.rs b/libsptprp/src/cryptography.rs
new file mode 100644
index 0000000..dca0e0e
--- /dev/null
+++ b/libsptprp/src/cryptography.rs
@@ -0,0 +1,8 @@
+use blake2::Blake2s256;
+use blake2::Digest;
+
+pub fn HASH(data: &(impl AsRef<[u8]> + ?Sized)) -> [u8; 32] {
+    let mut hasher = Blake2s256::new();
+    hasher.update(data);
+    hasher.finalize().try_into().unwrap()
+}
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diff --git a/libsptprp/src/packets/clientbound.rs b/libsptprp/src/packets/clientbound.rs
new file mode 100644
index 0000000..8ef7ad1
--- /dev/null
+++ b/libsptprp/src/packets/clientbound.rs
@@ -0,0 +1,53 @@
+use crate::packets::{PacketParseError, SptprpPacket};
+
+#[derive(Debug, PartialEq)]
+pub struct ChannelNotReadyPacket {
+    pub channel: [u8; 32]
+}
+impl SptprpPacket for ChannelNotReadyPacket {
+    const PACKET_ID: u8 = 0x02;
+
+    fn to_bytes(&self) -> Vec<u8> {
+        let mut bytes = vec![0x02];
+        bytes.extend_from_slice(&self.channel);
+        bytes
+    }
+
+    fn from_bytes(bytes: &Vec<u8>) -> Result<Self, PacketParseError> {
+        if bytes.len() != 33 {
+            return Err(PacketParseError::IncorrectPacketLength)
+        }
+        if bytes[0] != 0x02u8 {
+            return Err(PacketParseError::IncorrectPacketType)
+        }
+        Ok(Self {
+            channel: bytes[1..].try_into().unwrap()
+        })
+    }
+}
+
+#[derive(Debug, PartialEq)]
+pub struct ChannelReadyPacket {
+    pub channel: [u8; 32]
+}
+impl SptprpPacket for ChannelReadyPacket {
+    const PACKET_ID: u8 = 0x03;
+
+    fn to_bytes(&self) -> Vec<u8> {
+        let mut bytes = vec![0x03];
+        bytes.extend_from_slice(&self.channel);
+        bytes
+    }
+
+    fn from_bytes(bytes: &Vec<u8>) -> Result<Self, PacketParseError> {
+        if bytes.len() != 33 {
+            return Err(PacketParseError::IncorrectPacketLength)
+        }
+        if bytes[0] != 0x03u8 {
+            return Err(PacketParseError::IncorrectPacketType)
+        }
+        Ok(Self {
+            channel: bytes[1..].try_into().unwrap()
+        })
+    }
+}
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diff --git a/libsptprp/src/packets/initbound.rs b/libsptprp/src/packets/initbound.rs
new file mode 100644
index 0000000..e69de29
diff --git a/libsptprp/src/packets/mod.rs b/libsptprp/src/packets/mod.rs
new file mode 100644
index 0000000..5951ec9
--- /dev/null
+++ b/libsptprp/src/packets/mod.rs
@@ -0,0 +1,17 @@
+pub mod clientbound;
+pub mod initbound;
+pub mod recvbound;
+pub mod relaybound;
+
+#[derive(Debug)]
+pub enum PacketParseError {
+    IncorrectPacketType,
+    IncorrectPacketLength
+}
+
+pub trait SptprpPacket {
+    const PACKET_ID: u8;
+
+    fn to_bytes(&self) -> Vec<u8>;
+    fn from_bytes(bytes: &Vec<u8>) -> Result<Self, PacketParseError> where Self: Sized;
+}
diff --git a/libsptprp/src/packets/recvbound.rs b/libsptprp/src/packets/recvbound.rs
new file mode 100644
index 0000000..e69de29
diff --git a/libsptprp/src/packets/relaybound.rs b/libsptprp/src/packets/relaybound.rs
new file mode 100644
index 0000000..1109910
--- /dev/null
+++ b/libsptprp/src/packets/relaybound.rs
@@ -0,0 +1,71 @@
+use crate::packets::{PacketParseError, SptprpPacket};
+
+#[derive(Debug, PartialEq)]
+pub struct ChannelWaitPacket {
+    pub channel: [u8; 32]
+}
+impl SptprpPacket for ChannelWaitPacket {
+    const PACKET_ID: u8 = 0x01;
+
+    fn to_bytes(&self) -> Vec<u8> {
+        let mut bytes = vec![0x01];
+        bytes.extend_from_slice(&self.channel);
+        bytes
+    }
+
+    fn from_bytes(bytes: &Vec<u8>) -> Result<Self, PacketParseError> {
+        if bytes.len() != 33 {
+            return Err(PacketParseError::IncorrectPacketLength)
+        }
+        if bytes[0] != 0x01u8 {
+            return Err(PacketParseError::IncorrectPacketType)
+        }
+        Ok(Self {
+            channel: bytes[1..].try_into().unwrap()
+        })
+    }
+}
+
+#[derive(Debug, PartialEq)]
+pub struct RelayDataPacket {
+    pub channel: [u8; 32],
+    pub data_len: u64,
+    pub data: Vec<u8>
+}
+impl SptprpPacket for RelayDataPacket {
+    const PACKET_ID: u8 = 0x04;
+
+    fn to_bytes(&self) -> Vec<u8> {
+        let mut bytes = vec![4u8];
+        bytes.extend_from_slice(&self.channel);
+        bytes.extend_from_slice(&self.data_len.to_le_bytes());
+        bytes.extend_from_slice(&self.data[..]);
+        bytes.push(0xfe);
+        bytes
+    }
+
+    fn from_bytes(bytes: &Vec<u8>) -> Result<Self, PacketParseError> where Self: Sized {
+
+        if bytes.len() < 42 {
+            return Err(PacketParseError::IncorrectPacketLength)
+        }
+
+        if bytes[0] != 0x04 && bytes[bytes.len()-1] != 0xfe {
+            return Err(PacketParseError::IncorrectPacketType)
+        }
+
+        let channel = &bytes[1..33];
+        let data_len = u64::from_le_bytes(bytes[33..41].try_into().unwrap());
+        let data = &bytes[41..41 + data_len as usize];
+
+        if bytes[40 + data_len as usize + 1] != 0xfe {
+            return Err(PacketParseError::IncorrectPacketType)
+        }
+
+        Ok(Self {
+            channel: channel.try_into().unwrap(),
+            data_len,
+            data: data.to_vec(),
+        })
+    }
+}
\ No newline at end of file
diff --git a/libsptprp/src/tests.rs b/libsptprp/src/tests.rs
new file mode 100644
index 0000000..8ed32e8
--- /dev/null
+++ b/libsptprp/src/tests.rs
@@ -0,0 +1,52 @@
+use crate::cryptography::HASH;
+use crate::packets::clientbound::{ChannelNotReadyPacket, ChannelReadyPacket};
+use crate::packets::relaybound::{ChannelWaitPacket, RelayDataPacket};
+use crate::packets::SptprpPacket;
+
+#[test]
+pub fn pkt_channel_wait() {
+    assert_eq!(ChannelWaitPacket {
+        channel: [0u8; 32],
+    }.to_bytes(), [1u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8]);
+    assert_eq!(ChannelWaitPacket {
+        channel: [0u8; 32],
+    }, ChannelWaitPacket::from_bytes(&vec![1u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8]).unwrap())
+}
+
+#[test]
+pub fn pkt_channel_not_ready() {
+    assert_eq!(ChannelNotReadyPacket {
+        channel: [0u8; 32],
+    }.to_bytes(), [2u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8]);
+    assert_eq!(ChannelNotReadyPacket {
+        channel: [0u8; 32],
+    }, ChannelNotReadyPacket::from_bytes(&vec![2u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8]).unwrap())
+}
+#[test]
+pub fn pkt_channel_ready() {
+    assert_eq!(ChannelReadyPacket {
+        channel: [0u8; 32],
+    }.to_bytes(), [3u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8]);
+    assert_eq!(ChannelReadyPacket {
+        channel: [0u8; 32],
+    }, ChannelReadyPacket::from_bytes(&vec![3u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8]).unwrap())
+}
+
+#[test]
+pub fn hash() {
+    assert_eq!(HASH("hello"), [25u8, 33, 59, 172, 197, 141, 238, 109, 189, 227, 206, 185, 164, 124, 187, 51, 11, 61, 134, 248, 204, 168, 153, 126, 176, 11, 228, 86, 241, 64, 202, 37])
+}
+
+#[test]
+pub fn pkt_relay() {
+    assert_eq!(RelayDataPacket {
+        channel: [0u8; 32],
+        data_len: 1,
+        data: vec![42u8],
+    }.to_bytes(), [4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 42, 254]);
+    assert_eq!(RelayDataPacket {
+        channel: [0u8; 32],
+        data_len: 1,
+        data: vec![42u8]
+    }, RelayDataPacket::from_bytes(&vec![4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 42, 254]).unwrap())
+}
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