From 12c9db8935f25a5f9e4633af85ea96acaa914d23 Mon Sep 17 00:00:00 2001
From: Sydney Munro <97561403+sydney-munro@users.noreply.github.com>
Date: Fri, 15 Mar 2024 11:13:45 -0700
Subject: [PATCH] fix: Fix name digest for noprefix (#2448)

---
 .../ParallelCompositeUploadBlobWriteSessionConfig.java       | 5 ++++-
 .../ParallelCompositeUploadBlobWriteSessionConfigTest.java   | 2 +-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/google-cloud-storage/src/main/java/com/google/cloud/storage/ParallelCompositeUploadBlobWriteSessionConfig.java b/google-cloud-storage/src/main/java/com/google/cloud/storage/ParallelCompositeUploadBlobWriteSessionConfig.java
index b877d82d9..e13f54964 100644
--- a/google-cloud-storage/src/main/java/com/google/cloud/storage/ParallelCompositeUploadBlobWriteSessionConfig.java
+++ b/google-cloud-storage/src/main/java/com/google/cloud/storage/ParallelCompositeUploadBlobWriteSessionConfig.java
@@ -612,7 +612,10 @@ public NoPrefix(SecureRandom rand) {
       }
 
       @Override
-      protected String fmtFields(String randomKey, String nameDigest, String partRange) {
+      protected String fmtFields(String randomKey, String ultimateObjectName, String partRange) {
+        HashCode hashCode =
+            OBJECT_NAME_HASH_FUNCTION.hashString(ultimateObjectName, StandardCharsets.UTF_8);
+        String nameDigest = B64.encodeToString(hashCode.asBytes());
         return randomKey
             + FIELD_SEPARATOR
             // todo: do we want to
diff --git a/google-cloud-storage/src/test/java/com/google/cloud/storage/ParallelCompositeUploadBlobWriteSessionConfigTest.java b/google-cloud-storage/src/test/java/com/google/cloud/storage/ParallelCompositeUploadBlobWriteSessionConfigTest.java
index 86eddc5b9..465741a7d 100644
--- a/google-cloud-storage/src/test/java/com/google/cloud/storage/ParallelCompositeUploadBlobWriteSessionConfigTest.java
+++ b/google-cloud-storage/src/test/java/com/google/cloud/storage/ParallelCompositeUploadBlobWriteSessionConfigTest.java
@@ -84,7 +84,7 @@ public void partNameStrategy_objectNamePrefix() throws Exception {
         // name digest
         () -> assertField(fmt, 1).hasLength(22),
         () -> assertField(fmt, 2).isEqualTo("0001-0096.part"),
-        () -> assertThat(fmt).startsWith("a/b/obj/"));
+        () -> assertThat(fmt).startsWith("a/b/obj"));
   }
 
   private static StringSubject assertField(String fmt, int idx) {