Line data    Source code

       1              : use tokio::io::{AsyncRead, AsyncWrite};
       2              : use tracing::{debug, info};
       3              : 
       4              : use super::{ComputeCredentials, ComputeUserInfo, ComputeUserInfoNoEndpoint};
       5              : use crate::auth::{self, AuthFlow};
       6              : use crate::config::AuthenticationConfig;
       7              : use crate::context::RequestMonitoring;
       8              : use crate::control_plane::AuthSecret;
       9              : use crate::intern::EndpointIdInt;
      10              : use crate::sasl;
      11              : use crate::stream::{self, Stream};
      12              : 
      13              : /// Compared to [SCRAM](crate::scram), cleartext password auth saves
      14              : /// one round trip and *expensive* computations (>= 4096 HMAC iterations).
      15              : /// These properties are benefical for serverless JS workers, so we
      16              : /// use this mechanism for websocket connections.
      17            1 : pub(crate) async fn authenticate_cleartext(
      18            1 :     ctx: &RequestMonitoring,
      19            1 :     info: ComputeUserInfo,
      20            1 :     client: &mut stream::PqStream<Stream<impl AsyncRead + AsyncWrite + Unpin>>,
      21            1 :     secret: AuthSecret,
      22            1 :     config: &'static AuthenticationConfig,
      23            1 : ) -> auth::Result<ComputeCredentials> {
      24            1 :     debug!("cleartext auth flow override is enabled, proceeding");
      25            1 :     ctx.set_auth_method(crate::context::AuthMethod::Cleartext);
      26            1 : 
      27            1 :     // pause the timer while we communicate with the client
      28            1 :     let paused = ctx.latency_timer_pause(crate::metrics::Waiting::Client);
      29            1 : 
      30            1 :     let ep = EndpointIdInt::from(&info.endpoint);
      31              : 
      32            1 :     let auth_flow = AuthFlow::new(client)
      33            1 :         .begin(auth::CleartextPassword {
      34            1 :             secret,
      35            1 :             endpoint: ep,
      36            1 :             pool: config.thread_pool.clone(),
      37            1 :         })
      38            0 :         .await?;
      39            1 :     drop(paused);
      40              :     // cleartext auth is only allowed to the ws/http protocol.
      41              :     // If we're here, we already received the password in the first message.
      42              :     // Scram protocol will be executed on the proxy side.
      43            2 :     let auth_outcome = auth_flow.authenticate().await?;
      44              : 
      45            1 :     let keys = match auth_outcome {
      46            1 :         sasl::Outcome::Success(key) => key,
      47            0 :         sasl::Outcome::Failure(reason) => {
      48            0 :             info!("auth backend failed with an error: {reason}");
      49            0 :             return Err(auth::AuthError::password_failed(&*info.user));
      50              :         }
      51              :     };
      52              : 
      53            1 :     Ok(ComputeCredentials { info, keys })
      54            1 : }
      55              : 
      56              : /// Workaround for clients which don't provide an endpoint (project) name.
      57              : /// Similar to [`authenticate_cleartext`], but there's a specific password format,
      58              : /// and passwords are not yet validated (we don't know how to validate them!)
      59            1 : pub(crate) async fn password_hack_no_authentication(
      60            1 :     ctx: &RequestMonitoring,
      61            1 :     info: ComputeUserInfoNoEndpoint,
      62            1 :     client: &mut stream::PqStream<Stream<impl AsyncRead + AsyncWrite + Unpin>>,
      63            1 : ) -> auth::Result<(ComputeUserInfo, Vec<u8>)> {
      64            1 :     debug!("project not specified, resorting to the password hack auth flow");
      65            1 :     ctx.set_auth_method(crate::context::AuthMethod::Cleartext);
      66            1 : 
      67            1 :     // pause the timer while we communicate with the client
      68            1 :     let _paused = ctx.latency_timer_pause(crate::metrics::Waiting::Client);
      69              : 
      70            1 :     let payload = AuthFlow::new(client)
      71            1 :         .begin(auth::PasswordHack)
      72            0 :         .await?
      73            1 :         .get_password()
      74            1 :         .await?;
      75              : 
      76            1 :     info!(project = &*payload.endpoint, "received missing parameter");
      77              : 
      78              :     // Report tentative success; compute node will check the password anyway.
      79            1 :     Ok((
      80            1 :         ComputeUserInfo {
      81            1 :             user: info.user,
      82            1 :             options: info.options,
      83            1 :             endpoint: payload.endpoint,
      84            1 :         },
      85            1 :         payload.password,
      86            1 :     ))
      87            1 : }