Add support for datanode sasl negotation (#81)

* Add support for datanode sasl negotation

Author: Kimahriman

README.md

@@ -25,7 +25,7 @@ Here is a list of currently supported and unsupported but possible future featur
 - [x] Kerberos authentication (GSSAPI SASL support)
 - [x] Token authentication (DIGEST-MD5 SASL support, no encryption support)
 - [x] NameNode SASL connection
-- [ ] DataNode SASL connection
+- [x] DataNode SASL connection
 - [ ] DataNode data transfer encryption
 - [ ] Encryption at rest (KMS support)
 

crates/hdfs-native/Cargo.toml

@@ -22,7 +22,7 @@ libc = "0.2"
 libgssapi = { version = "0.7", default-features = false, optional = true }
 log = "0.4"
 num-traits = "0.2"
-once_cell = "1.19.0"
+once_cell = "1"
 prost = "0.12"
 prost-types = "0.12"
 roxmltree = "0.18"

crates/hdfs-native/minidfs/src/main/java/main/Main.java

@@ -41,6 +41,9 @@ public static void main(String args[]) throws Exception {
         }
         MiniKdc kdc = null;
 
+        // If an existing token exists, make sure to delete it
+        new File("target/test/delegation_token").delete();
+
         Configuration conf = new Configuration();
         if (flags.contains("security")) {
             kdc = new MiniKdc(MiniKdc.createConf(), new File("target/test/kdc"));
@@ -60,8 +63,10 @@ public static void main(String args[]) throws Exception {
             conf.set(DFSConfigKeys.DFS_DATANODE_KEYTAB_FILE_KEY, "target/test/hdfs.keytab");
             conf.set(DFS_DATANODE_KERBEROS_PRINCIPAL_KEY, "hdfs/localhost@" + kdc.getRealm());
             conf.set(DFSConfigKeys.DFS_BLOCK_ACCESS_TOKEN_ENABLE_KEY, "true");
-            // conf.set(DFS_DATA_TRANSFER_PROTECTION_KEY, "authentication");
             conf.set(DFSConfigKeys.IGNORE_SECURE_PORTS_FOR_TESTING_KEY, "true");
+            if (flags.contains("data_transfer_security")) {
+                conf.set(DFS_DATA_TRANSFER_PROTECTION_KEY, "authentication");
+            }
         }
 
         HdfsConfiguration hdfsConf = new HdfsConfiguration(conf);
@@ -155,8 +160,6 @@ public static void main(String args[]) throws Exception {
                 DataOutputStream os = new DataOutputStream(new FileOutputStream("target/test/delegation_token"));
                 creds.writeTokenStorageToStream(os, SerializedFormat.WRITABLE);
                 os.close();
-            } else {
-                new File("target/test/delegation_token").delete();
             }
         }
 

crates/hdfs-native/src/hdfs/block_reader.rs

@@ -37,15 +37,15 @@ pub(crate) fn get_block_stream(
 
 /// Connects to a DataNode to do a read, attempting to used cached connections.
 async fn connect_and_send(
-    url: &str,
+    datanode_id: &hdfs::DatanodeIdProto,
     block: &hdfs::ExtendedBlockProto,
     token: common::TokenProto,
     offset: u64,
     len: u64,
 ) -> Result<(DatanodeConnection, BlockOpResponseProto)> {
     let mut remaining_attempts = 2;
     while remaining_attempts > 0 {
-        if let Some(mut conn) = DATANODE_CACHE.get(url) {
+        if let Some(mut conn) = DATANODE_CACHE.get(datanode_id) {
             let message = hdfs::OpReadBlockProto {
                 header: conn.build_header(block, Some(token.clone())),
                 offset,
@@ -68,7 +68,7 @@ async fn connect_and_send(
         }
         remaining_attempts -= 1;
     }
-    let mut conn = DatanodeConnection::connect(url).await?;
+    let mut conn = DatanodeConnection::connect(datanode_id, &token).await?;
 
     let message = hdfs::OpReadBlockProto {
         header: conn.build_header(block, Some(token)),
@@ -117,10 +117,9 @@ impl ReplicatedBlockStream {
         }
 
         let datanode = &self.block.locs[self.current_replica].id;
-        let datanode_url = format!("{}:{}", datanode.ip_addr, datanode.xfer_port);
 
         let (connection, response) = connect_and_send(
-            &datanode_url,
+            datanode,
             &self.block.b,
             self.block.block_token.clone(),
             self.offset as u64,
@@ -389,15 +388,8 @@ impl StripedBlockStream {
             return Ok(());
         }
 
-        let datanode_url = format!("{}:{}", datanode.ip_addr, datanode.xfer_port);
-        let (mut connection, response) = connect_and_send(
-            &datanode_url,
-            block,
-            token.clone(),
-            offset as u64,
-            len as u64,
-        )
-        .await?;
+        let (mut connection, response) =
+            connect_and_send(datanode, block, token.clone(), offset as u64, len as u64).await?;
 
         if response.status() != hdfs::Status::Success {
             return Err(HdfsError::DataTransferError(response.message().to_string()));

crates/hdfs-native/src/hdfs/block_writer.rs

@@ -100,9 +100,7 @@ impl ReplicatedBlockWriter {
         server_defaults: hdfs::FsServerDefaultsProto,
     ) -> Result<Self> {
         let datanode = &block.locs[0].id;
-        let mut connection =
-            DatanodeConnection::connect(&format!("{}:{}", datanode.ip_addr, datanode.xfer_port))
-                .await?;
+        let mut connection = DatanodeConnection::connect(datanode, &block.block_token).await?;
 
         let checksum = hdfs::ChecksumProto {
             r#type: hdfs::ChecksumTypeProto::ChecksumCrc32c as i32,

crates/hdfs-native/src/hdfs/connection.rs

@@ -25,11 +25,16 @@ use tokio::{
 use uuid::Uuid;
 
 use crate::proto::common::rpc_response_header_proto::RpcStatusProto;
+use crate::proto::common::TokenProto;
+use crate::proto::hdfs::DatanodeIdProto;
 use crate::proto::{common, hdfs};
 use crate::security::sasl::{SaslReader, SaslRpcClient, SaslWriter};
 use crate::security::user::UserInfo;
 use crate::{HdfsError, Result};
 
+#[cfg(feature = "token")]
+use crate::security::sasl::SaslDatanodeConnection;
+
 const PROTOCOL: &str = "org.apache.hadoop.hdfs.protocol.ClientProtocol";
 const DATA_TRANSFER_VERSION: u16 = 28;
 const MAX_PACKET_HEADER_SIZE: usize = 33;
@@ -520,12 +525,24 @@ pub(crate) struct DatanodeConnection {
 }
 
 impl DatanodeConnection {
-    pub(crate) async fn connect(url: &str) -> Result<Self> {
-        let stream = BufStream::new(connect(url).await?);
+    #[allow(unused_variables)]
+    pub(crate) async fn connect(datanode_id: &DatanodeIdProto, token: &TokenProto) -> Result<Self> {
+        let url = format!("{}:{}", datanode_id.ip_addr, datanode_id.xfer_port);
+        let stream = connect(&url).await?;
+
+        // If the token has an identifier, we can do SASL negotation
+        #[cfg(feature = "token")]
+        let stream = if token.identifier.is_empty() {
+            stream
+        } else {
+            debug!("{:?}", token);
+            let sasl_connection = SaslDatanodeConnection::create(stream);
+            sasl_connection.negotiate(datanode_id, token).await?
+        };
 
         let conn = DatanodeConnection {
             client_name: Uuid::new_v4().to_string(),
-            stream,
+            stream: BufStream::new(stream),
             url: url.to_string(),
         };
         Ok(conn)
@@ -704,15 +721,16 @@ impl DatanodeConnectionCache {
         }
     }
 
-    pub(crate) fn get(&self, url: &str) -> Option<DatanodeConnection> {
+    pub(crate) fn get(&self, datanode_id: &hdfs::DatanodeIdProto) -> Option<DatanodeConnection> {
         // Keep things simply and just expire cache entries when checking the cache. We could
         // move this to its own task but that will add a little more complexity.
         self.remove_expired();
 
+        let url = format!("{}:{}", datanode_id.ip_addr, datanode_id.xfer_port);
         let mut cache = self.cache.lock().unwrap();
 
         cache
-            .get_mut(url)
+            .get_mut(&url)
             .iter_mut()
             .flat_map(|conns| conns.pop_front())
             .map(|(_, conn)| conn)

crates/hdfs-native/src/minidfs.rs

@@ -9,11 +9,12 @@ use which::which;
 
 #[derive(PartialEq, Eq, Hash, Debug)]
 pub enum DfsFeatures {
-    SECURITY,
-    TOKEN,
-    PRIVACY,
+    Security,
+    DataTransferSecurity,
+    Token,
+    Privacy,
     HA,
-    VIEWFS,
+    ViewFS,
     EC,
     RBF,
 }
@@ -23,10 +24,11 @@ impl DfsFeatures {
         match self {
             DfsFeatures::EC => "ec",
             DfsFeatures::HA => "ha",
-            DfsFeatures::VIEWFS => "viewfs",
-            DfsFeatures::PRIVACY => "privacy",
-            DfsFeatures::SECURITY => "security",
-            DfsFeatures::TOKEN => "token",
+            DfsFeatures::ViewFS => "viewfs",
+            DfsFeatures::Privacy => "privacy",
+            DfsFeatures::Security => "security",
+            DfsFeatures::DataTransferSecurity => "data_transfer_security",
+            DfsFeatures::Token => "token",
             DfsFeatures::RBF => "rbf",
         }
     }
@@ -35,9 +37,9 @@ impl DfsFeatures {
         match value {
             "ec" => Some(DfsFeatures::EC),
             "ha" => Some(DfsFeatures::HA),
-            "privacy" => Some(DfsFeatures::PRIVACY),
-            "security" => Some(DfsFeatures::SECURITY),
-            "token" => Some(DfsFeatures::TOKEN),
+            "privacy" => Some(DfsFeatures::Privacy),
+            "security" => Some(DfsFeatures::Security),
+            "token" => Some(DfsFeatures::Token),
             _ => None,
         }
     }
@@ -56,6 +58,12 @@ impl MiniDfs {
         for feature in features.iter() {
             feature_args.push(feature.as_str());
         }
+        // If the `token` feature is enabled, we need to force the data transfer protection
+        #[cfg(feature = "token")]
+        if !features.contains(&DfsFeatures::DataTransferSecurity) {
+            feature_args.push(DfsFeatures::DataTransferSecurity.as_str());
+        }
+
         let mut child = Command::new(mvn_exec)
             .args([
                 "-f",
@@ -86,7 +94,7 @@ impl MiniDfs {
         // Make sure this doesn't care over from a token test to a non-token test
         env::remove_var("HADOOP_TOKEN_FILE_LOCATION");
 
-        if features.contains(&DfsFeatures::SECURITY) {
+        if features.contains(&DfsFeatures::Security) {
             let krb_conf = output.next().unwrap().unwrap();
             let kdestroy_exec = which("kdestroy").expect("Failed to find kdestroy executable");
             Command::new(kdestroy_exec).spawn().unwrap().wait().unwrap();
@@ -106,7 +114,7 @@ impl MiniDfs {
             );
 
             // If we testing token auth, set the path to the file and make sure we don't have an old kinit, otherwise kinit
-            if features.contains(&DfsFeatures::TOKEN) {
+            if features.contains(&DfsFeatures::Token) {
                 env::set_var("HADOOP_TOKEN_FILE_LOCATION", "target/test/delegation_token");
             } else {
                 let kinit_exec = which("kinit").expect("Failed to find kinit executable");
@@ -120,7 +128,7 @@ impl MiniDfs {
             }
         }
 
-        let url = if features.contains(&DfsFeatures::VIEWFS) {
+        let url = if features.contains(&DfsFeatures::ViewFS) {
             "viewfs://minidfs-viewfs"
         } else if features.contains(&DfsFeatures::RBF) {
             "hdfs://fed"