Closes#1525
* Adds validation for the `Content-MD5` header.
* If the header value is invalid, the gateway now returns an `InvalidDigest` error.
* If the value is valid but does not match the payload, it returns a `BadDigest` error.
* Adds integration test cases for `PutBucketCors` with `Content-MD5`.
Fixes#1540Fixes#1538Fixes#1513Fixes#1425
Fixes SigV4 authentication and presigned URL error handling. Adds two sets of errors in the `s3err` package for these authentication mechanisms.
* Adds a check to return a custom "not supported" error when `X-Amz-Security-Token` is present in presigned URLs.
* Adds a check to return a custom "not supported" error when the `AWS4-ECDSA-P256-SHA256` algorithm is used in presigned URLs.
The debuglogger should be a top level module since we expect
all modules within the project to make use of this. If its
hidden in s3api, then contributors are less likely to make
use of this outside of s3api.
This implementation introduces **public buckets**, which are accessible without signature-based authentication.
There are two ways to grant public access to a bucket:
* **Bucket ACLs**
* **Bucket Policies**
Only `Get` and `List` operations are permitted on public buckets. All **write operations** require authentication, regardless of whether public access is granted through an ACL or a policy.
The implementation includes an `AuthorizePublicBucketAccess` middleware, which checks if public access has been granted to the bucket. If so, authentication middlewares are skipped. For unauthenticated requests, appropriate errors are returned based on the specific S3 action.
---
**1. Bucket-Level Operations:**
```json
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Principal": "*",
"Action": "s3:*",
"Resource": "arn:aws:s3:::test"
}
]
}
```
**2. Object-Level Operations:**
```json
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Principal": "*",
"Action": "s3:*",
"Resource": "arn:aws:s3:::test/*"
}
]
}
```
**3. Both Bucket and Object-Level Operations:**
```json
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Principal": "*",
"Action": "s3:*",
"Resource": "arn:aws:s3:::test"
},
{
"Effect": "Allow",
"Principal": "*",
"Action": "s3:*",
"Resource": "arn:aws:s3:::test/*"
}
]
}
```
---
```sh
aws s3api create-bucket --bucket test --object-ownership BucketOwnerPreferred
aws s3api put-bucket-acl --bucket test --acl public-read
```
Fixes#961Fixes#1248
The gateway should return a `MissingContentLength` error if the `Content-Length` HTTP header is missing for upload operations (`PutObject`, `UploadPart`).
The second fix involves enforcing a maximum object size limit of `5 * 1024 * 1024 * 1024` bytes (5 GB) by validating the value of the `Content-Length` header. If the value exceeds this limit, the gateway should return an `EntityTooLarge` error.
We were trying to parse a non existing acl and returning an
internal server error due to invalid json acl data.
If the bucket acl does not exist, return a default acl with the
root account as the owner.
This fixes#1060, but does not address the invalid acl format
from s3cmd reported in #963.
