1.0.0

Tschuss Status Quo - Hallo, Zukunft!

src/crypto/hash.rs

@@ -0,0 +1,90 @@
+use hmac::{Hmac, Mac};
+use sha2::Sha256;
+use md5::Md5;
+use sha1::Sha1;
+use sha2::Digest;
+
+type HmacSha256 = Hmac<Sha256>;
+
+/// SHA-256
+pub fn sha256(data: &[u8]) -> [u8; 32] {
+    let mut hasher = Sha256::new();
+    hasher.update(data);
+    hasher.finalize().into()
+}
+
+/// SHA-256 HMAC
+pub fn sha256_hmac(key: &[u8], data: &[u8]) -> [u8; 32] {
+    let mut mac = HmacSha256::new_from_slice(key)
+        .expect("HMAC accepts any key length");
+    mac.update(data);
+    mac.finalize().into_bytes().into()
+}
+
+/// SHA-1
+pub fn sha1(data: &[u8]) -> [u8; 20] {
+    let mut hasher = Sha1::new();
+    hasher.update(data);
+    hasher.finalize().into()
+}
+
+/// MD5
+pub fn md5(data: &[u8]) -> [u8; 16] {
+    let mut hasher = Md5::new();
+    hasher.update(data);
+    hasher.finalize().into()
+}
+
+/// CRC32
+pub fn crc32(data: &[u8]) -> u32 {
+    crc32fast::hash(data)
+}
+
+/// Middle Proxy Keygen
+pub fn derive_middleproxy_keys(
+    nonce_srv: &[u8; 16],
+    nonce_clt: &[u8; 16],
+    clt_ts: &[u8; 4],
+    srv_ip: Option<&[u8]>,
+    clt_port: &[u8; 2],
+    purpose: &[u8],
+    clt_ip: Option<&[u8]>,
+    srv_port: &[u8; 2],
+    secret: &[u8],
+    clt_ipv6: Option<&[u8; 16]>,
+    srv_ipv6: Option<&[u8; 16]>,
+) -> ([u8; 32], [u8; 16]) {
+    const EMPTY_IP: [u8; 4] = [0, 0, 0, 0];
+    
+    let srv_ip = srv_ip.unwrap_or(&EMPTY_IP);
+    let clt_ip = clt_ip.unwrap_or(&EMPTY_IP);
+    
+    let mut s = Vec::with_capacity(256);
+    s.extend_from_slice(nonce_srv);
+    s.extend_from_slice(nonce_clt);
+    s.extend_from_slice(clt_ts);
+    s.extend_from_slice(srv_ip);
+    s.extend_from_slice(clt_port);
+    s.extend_from_slice(purpose);
+    s.extend_from_slice(clt_ip);
+    s.extend_from_slice(srv_port);
+    s.extend_from_slice(secret);
+    s.extend_from_slice(nonce_srv);
+    
+    if let (Some(clt_v6), Some(srv_v6)) = (clt_ipv6, srv_ipv6) {
+        s.extend_from_slice(clt_v6);
+        s.extend_from_slice(srv_v6);
+    }
+    
+    s.extend_from_slice(nonce_clt);
+    
+    let md5_1 = md5(&s[1..]);
+    let sha1_sum = sha1(&s);
+    let md5_2 = md5(&s[2..]);
+    
+    let mut key = [0u8; 32];
+    key[..12].copy_from_slice(&md5_1[..12]);
+    key[12..].copy_from_slice(&sha1_sum);
+    
+    (key, md5_2)
+}