[crypto] start working on hash code

.idea/vcs.xml

@@ -2,6 +2,5 @@
 <project version="4">
   <component name="VcsDirectoryMappings">
     <mapping directory="$PROJECT_DIR$" vcs="Git" />
-    <mapping directory="$PROJECT_DIR$/wginterface" vcs="Git" />
   </component>
 </project>

quicktap/Cargo.toml

@@ -8,6 +8,7 @@ edition = "2021"
 [dependencies]
 cidr = "0.2.1"
 etherparse = "0.13.0"
+blake2 = "0.10.5"
 
 [target.'cfg(unix)'.dependencies]
 tun = "0.5.4"

quicktap/src/crypto/hashes.rs

@@ -0,0 +1,10 @@
+use std::error::Error;
+use blake2::Blake2sVar;
+
+pub fn crypto_hash(input: &[u8]) -> Result<[u8; 32], Box<dyn Error>> {
+    let mut hasher = Blake2sVar::new(32)?;
+    hasher.update(input);
+    let mut result_buf = [0u8; 32];
+    hasher.finalize_variable(&mut result_buf)?;
+    Ok(result_buf)
+}

quicktap/src/crypto/mod.rs

@@ -0,0 +1,6 @@
+pub mod hashes;
+
+pub const CONSTURCTION: &str = "Noise_IKpsk2_25519_ChaChaPoly_BLAKE2s";
+pub const IDENTIFIER: &str = "WireGuard v1 zx2c4 Jason@zx2c4.com";
+pub const LABEL_MAC1: &str = "mac1----";
+pub const LABEL_COOKIE: &str = "cookie--";

quicktap/src/lib.rs

@@ -1 +1,2 @@
-pub mod drivers; // Baremetal network drivers for various platforms
+pub mod drivers;
+pub mod crypto;