initial commit

sasl/src/mechanisms/plain.rs

@@ -0,0 +1,42 @@
+//! Provides the SASL "PLAIN" mechanism.
+
+use SaslCredentials;
+use SaslMechanism;
+use SaslSecret;
+
+pub struct Plain {
+    username: String,
+    password: String,
+}
+
+impl Plain {
+    pub fn new<N: Into<String>, P: Into<String>>(username: N, password: P) -> Plain {
+        Plain {
+            username: username.into(),
+            password: password.into(),
+        }
+    }
+}
+
+impl SaslMechanism for Plain {
+    fn name(&self) -> &str {
+        "PLAIN"
+    }
+
+    fn from_credentials(credentials: SaslCredentials) -> Result<Plain, String> {
+        if let SaslSecret::Password(password) = credentials.secret {
+            Ok(Plain::new(credentials.username, password))
+        } else {
+            Err("PLAIN requires a password".to_owned())
+        }
+    }
+
+    fn initial(&mut self) -> Result<Vec<u8>, String> {
+        let mut auth = Vec::new();
+        auth.push(0);
+        auth.extend(self.username.bytes());
+        auth.push(0);
+        auth.extend(self.password.bytes());
+        Ok(auth)
+    }
+}