add stuff

Cargo.toml

@@ -16,7 +16,7 @@ futures = "0.3"
 handy_async = "0.2"
 hmac = "0.10.1"
 num = "0.1"
-sha-1 = "0.9.2"
+sha-1 = "0.9.8"
 trackable = "0.1"
 
 openssl = { version = "0.10", optional = true }

src/rfc3711.rs

@@ -361,6 +361,7 @@ impl Protocol for Srtcp {
 impl<P: Protocol> Context<P>
 where
     u64: From<P::PacketIndex>,
+    P::PacketIndex: Into<BigUint>,
 {
     pub fn new(master_key: &[u8], master_salt: &[u8]) -> Self {
         Context {