Auth header error when using AWS credential with HTTP module

[leesilverman]

Bug Description

I have a bucket named wrd-media-archive in region us-east-1. I'm making a listObjectsV2 call to https://wrd-media-archive.s3.amazonaws.com/ using the HTTP module. The credential I'm using has the region specified as us-east-1. However, I get this error when I make the http request. I'm guessing that N8N is using the region S3 in the "cannonical headers" portion of the auth header calculation instead of using the value from the credential.

Error code: 400
Full message: 400 - "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<Error><Code>AuthorizationHeaderMalformed</Code><Message>The authorization header is malformed; the region 's3' is wrong; expecting 'us-east-1'</Message><Region>us-east-1</Region><RequestId>YRJ175KYNDK8S1EE</RequestId><HostId>SLEa1+LB2woZ15VTf9ybhi56J5rE9k42qX+YHlDSBRJOrpo199l75NEMesp/dTe4nRGzS+ckLpA=</HostId></Error>"
Request: { "headers": { "accept": "application/json,text/html,application/xhtml+xml,application/xml,text/*;q=0.9, image/*;q=0.8, */*;q=0.7", "Host": "wrd-media-archive.s3.amazonaws.com", "X-Amz-Content-Sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855", "X-Amz-Date": "20241213T160555Z", "Authorization": "**hidden**" }, "method": "GET", "uri": "https://wrd-media-archive.s3.amazonaws.com/", "gzip": true, "rejectUnauthorized": true, "followRedirect": true, "resolveWithFullResponse": true, "followAllRedirects": true, "timeout": 300000, "qs": { "list-type": "2", "max-keys": "10", "prefix": "instagram" }, "encoding": null, "json": false, "useStream": true, "url": "https://wrd-media-archive.s3.amazonaws.com/" }

To Reproduce

1. Create an AWS credential.
2. Confirm that it works by using an AWS S3 built in module to upload a file
3. Try to use the HTTP module with the same credential to list the folder where you put the file

Expected behavior

The request authorization header should be calculated correctly

Operating System

Amazon Linux 2003

n8n Version

1.70.3

Node.js Version

v22.12.0

Database

PostgreSQL

Execution mode

main (default)

[Joffcom]

Hey @leesilverman,

We have created an internal ticket to look into this which we will be tracking as "N8N-7962"