0002-00000422

Problem description

The X-Amz-Signature parameter is missing from the request.

Causes

The request uses Amazon S3-compatible Signature Version 4, but the X-Amz-Signature parameter was not included in the URL query string.

Examples

The following request is missing X-Amz-Signature:

GET /test.txt
  ?X-Amz-Algorithm=AWS4-HMAC-SHA256
  &X-Amz-Credential=LTAI****************/20221220/us-east-1/s3/aws4_request
  &X-Amz-Date=20221220T084818Z
  &X-Amz-Expires=86400
  &X-Amz-SignedHeaders=host
  HTTP/1.0
Date: Tue, 20 Dec 2022 08:48:18 GMT
Host: oss-example.oss-cn-hangzhou.aliyuncs.com
x-oss-s3-compat: true

Solutions

Add X-Amz-Signature to the request and make sure all other parameters are correctly configured:

GET /test.txt
  ?X-Amz-Algorithm=AWS4-HMAC-SHA256
  &X-Amz-Credential=LTAI****************/20221220/us-east-1/s3/aws4_request
  &X-Amz-Date=20221220T084818Z
  &X-Amz-Expires=86400
  &X-Amz-SignedHeaders=host
  &X-Amz-Signature=ab2s****
  HTTP/1.0
Date: Tue, 20 Dec 2022 08:48:18 GMT
Host: oss-example.oss-cn-hangzhou.aliyuncs.com
x-oss-s3-compat: true

To avoid constructing requests manually, use Amazon S3 SDKs to initiate the request. For more information, see Use Amazon S3 SDKs to access OSS.