WIP: remoting (#10085)

Release Notes:

- Added private alpha support for remote development. Please reach out to hi@zed.dev if you'd like to be part of shaping this feature.

crates/collab/src/auth.rs

@@ -10,6 +10,7 @@ use axum::{
     response::IntoResponse,
 };
 use prometheus::{exponential_buckets, register_histogram, Histogram};
+pub use rpc::auth::random_token;
 use scrypt::{
     password_hash::{PasswordHash, PasswordVerifier},
     Scrypt,
@@ -152,7 +153,7 @@ pub async fn create_access_token(
 /// Hashing prevents anyone with access to the database being able to login.
 /// As the token is randomly generated, we don't need to worry about scrypt-style
 /// protection.
-fn hash_access_token(token: &str) -> String {
+pub fn hash_access_token(token: &str) -> String {
     let digest = sha2::Sha256::digest(token);
     format!(
         "$sha256${}",
@@ -230,18 +231,15 @@ pub async fn verify_access_token(
     })
 }
 
-// a dev_server_token has the format <id>.<base64>. This is to make them
-// relatively easy to copy/paste around.
+pub fn generate_dev_server_token(id: usize, access_token: String) -> String {
+    format!("{}.{}", id, access_token)
+}
+
 pub async fn verify_dev_server_token(
     dev_server_token: &str,
     db: &Arc<Database>,
 ) -> anyhow::Result<dev_server::Model> {
-    let mut parts = dev_server_token.splitn(2, '.');
-    let id = DevServerId(parts.next().unwrap_or_default().parse()?);
-    let token = parts
-        .next()
-        .ok_or_else(|| anyhow!("invalid dev server token format"))?;
-
+    let (id, token) = split_dev_server_token(dev_server_token)?;
     let token_hash = hash_access_token(&token);
     let server = db.get_dev_server(id).await?;
 
@@ -257,6 +255,17 @@ pub async fn verify_dev_server_token(
     }
 }
 
+// a dev_server_token has the format <id>.<base64>. This is to make them
+// relatively easy to copy/paste around.
+pub fn split_dev_server_token(dev_server_token: &str) -> anyhow::Result<(DevServerId, &str)> {
+    let mut parts = dev_server_token.splitn(2, '.');
+    let id = DevServerId(parts.next().unwrap_or_default().parse()?);
+    let token = parts
+        .next()
+        .ok_or_else(|| anyhow!("invalid dev server token format"))?;
+    Ok((id, token))
+}
+
 #[cfg(test)]
 mod test {
     use rand::thread_rng;