Nordalf opened a new issue, #466:
URL: https://github.com/apache/arrow-rs-object-store/issues/466
## Problem
Hey good folks,
When using Supabase's S3-compatible storage with session token
authentication (JWT), the `AmazonS3Builder` fails with "SignatureDoesNotMatch"
error: "The request signature we calculated does not match the signature you
provided. Check your credentials. The session token should be a valid JWT
token."
The same credentials work successfully with Supabase's generated
access_key/secret_key pairs. This is only an issue when you're adding the JWT
Session / user token into the mix.
Looking forward to the conversation on this topic!
## Reproduce
```rust
use object_store::aws::AmazonS3Builder;
let s3 = AmazonS3Builder::new()
.with_endpoint("https://project-ref.supabase.co/storage/v1/s3";)
.with_access_key_id("project_ref") // Supabase project
reference
.with_secret_access_key("supabase_anon_key") // Supabase anon/public
key
.with_token("eyJhbGciOiJIUzI1NiIsInR5cCI...") // Supabase JWT session
token
.build()?;
let result = s3.list(None).await; // Returns SignatureDoesNotMatch error
```
**Expected:** Operations should succeed as they do with AWS SDK for
JavaScript using identical credentials.
**Actual:** All operations fail with the error response indicating JWT
signature validation failure.
## Version Information
- **object_store version:** 0.12.2
- **Rust version:** rustc 1.88.0 (6b00bc388 2025-06-23)
- **Platform:** macOS 15.5
- **Supabase S3 endpoint:** S3-compatible storage (Public Alpha)
**Note:** The same JWT works successfully when used with
`@aws-sdk/client-s3` in JavaScript, suggesting the issue may be specific to
object_store's JWT handling in signature calculations. But I may be **very**
wrong here.
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