user generation added

randomness is generated via /dev/urandom thru getrandom crate

server/src/users.rs

@@ -0,0 +1,42 @@
+use chrono:Utc;
+use payload::NewUserInfo;
+use getrandom::getrandom;
+use bcrypt::{hash, DEFAULT_COST};
+
+fn rand_string() -> Option<String> {
+    // Returns a random string which we later hash with bcrypt
+    let mut raw_slice = [0u8; 32];
+    if let Some(_ignored) = getrandom(raw_slice) {
+        let mut buf = String::new();
+        for i in raw_slice {
+            let mut cv: u8 = *i;
+            if cv > 126 { cv %= 126; }
+            if cv < 33 { cv += 34; }
+            buf.push(cv as char);
+        }
+        Some(buf)
+    }
+    else {
+        None
+    }
+}
+
+fn rand_uid() -> u64 {
+    let mut buf = [0u8;8];
+    let _r = getrandom(&mut buf); // this basically never fails hehexd
+    u64::from_ne_bytes(buf)
+}
+
+// Returns a struct of payload::NewUserInfo
+pub fn createNewUser() -> NewUserInfo {
+    let uid = rand_id();
+    let uname = format!("User: {}", uid);
+    let hashkey = bcrypt(rand_string(), DEFAULT_COST);
+    // Fuck it
+    NewUserInfo {
+        userid: uid,
+        username: uname,
+        key_hash: hashkey,
+        valid: true
+    }
+}