seaweedfs/weed/s3api/s3api_object_copy_handlers.go
Sebastian Kurfuerst 10404c4275 FEATURE: add JWT to HTTP endpoints of Filer and use them in S3 Client
- one JWT for reading and one for writing, analogous to how the JWT
  between Master and Volume Server works
- I did not implement IP `whiteList` parameter on the filer

Additionally, because http_util.DownloadFile now sets the JWT,
the `download` command should now work when `jwt.signing.read` is
configured. By looking at the code, I think this case did not work
before.

## Docs to be adjusted after a release

Page `Amazon-S3-API`:

```
# Authentication with Filer

You can use mTLS for the gRPC connection between S3-API-Proxy and the filer, as
explained in [Security-Configuration](Security-Configuration) -
controlled by the `grpc.*` configuration in `security.toml`.

Starting with version XX, it is also possible to authenticate the HTTP
operations between the S3-API-Proxy and the Filer (especially
uploading new files). This is configured by setting
`filer_jwt.signing.key` and `filer_jwt.signing.read.key` in
`security.toml`.

With both configurations (gRPC and JWT), it is possible to have Filer
and S3 communicate in fully authenticated fashion; so Filer will reject
any unauthenticated communication.
```

Page `Security Overview`:

```
The following items are not covered, yet:

- master server http REST services

Starting with version XX, the Filer HTTP REST services can be secured
with a JWT, by setting `filer_jwt.signing.key` and
`filer_jwt.signing.read.key` in `security.toml`.

...

Before version XX: "weed filer -disableHttp", disable http operations, only gRPC operations are allowed. This works with "weed mount" by FUSE. It does **not work** with the [S3 Gateway](Amazon S3 API), as this does HTTP calls to the Filer.
Starting with version XX: secured by JWT, by setting `filer_jwt.signing.key` and `filer_jwt.signing.read.key` in `security.toml`. **This now works with the [S3 Gateway](Amazon S3 API).**

...

# Securing Filer HTTP with JWT

To enable JWT-based access control for the Filer,

1. generate `security.toml` file by `weed scaffold -config=security`
2. set `filer_jwt.signing.key` to a secret string - and optionally filer_jwt.signing.read.key` as well to a secret string
3. copy the same `security.toml` file to the filers and all S3 proxies.

If `filer_jwt.signing.key` is configured: When sending upload/update/delete HTTP operations to a filer server, the request header `Authorization` should be the JWT string (`Authorization: Bearer [JwtToken]`). The operation is authorized after the filer validates the JWT with `filer_jwt.signing.key`.

If `filer_jwt.signing.read.key` is configured: When sending GET or HEAD requests to a filer server, the request header `Authorization` should be the JWT string (`Authorization: Bearer [JwtToken]`). The operation is authorized after the filer validates the JWT with `filer_jwt.signing.read.key`.

The S3 API Gateway reads the above JWT keys and sends authenticated
HTTP requests to the filer.
```

Page `Security Configuration`:

```
(update scaffold file)

...

[filer_jwt.signing]
key = "blahblahblahblah"

[filer_jwt.signing.read]
key = "blahblahblahblah"
```

Resolves: #158
2021-12-30 14:45:27 +01:00

189 lines
5.5 KiB
Go

package s3api
import (
"fmt"
"github.com/chrislusf/seaweedfs/weed/glog"
xhttp "github.com/chrislusf/seaweedfs/weed/s3api/http"
"github.com/chrislusf/seaweedfs/weed/s3api/s3err"
weed_server "github.com/chrislusf/seaweedfs/weed/server"
"net/http"
"net/url"
"strconv"
"strings"
"time"
"github.com/chrislusf/seaweedfs/weed/util"
)
func (s3a *S3ApiServer) CopyObjectHandler(w http.ResponseWriter, r *http.Request) {
dstBucket, dstObject := xhttp.GetBucketAndObject(r)
// Copy source path.
cpSrcPath, err := url.QueryUnescape(r.Header.Get("X-Amz-Copy-Source"))
if err != nil {
// Save unescaped string as is.
cpSrcPath = r.Header.Get("X-Amz-Copy-Source")
}
srcBucket, srcObject := pathToBucketAndObject(cpSrcPath)
glog.V(3).Infof("CopyObjectHandler %s %s => %s %s", srcBucket, srcObject, dstBucket, dstObject)
if (srcBucket == dstBucket && srcObject == dstObject || cpSrcPath == "") && isReplace(r) {
fullPath := util.FullPath(fmt.Sprintf("%s/%s%s", s3a.option.BucketsPath, dstBucket, dstObject))
dir, name := fullPath.DirAndName()
entry, err := s3a.getEntry(dir, name)
if err != nil {
s3err.WriteErrorResponse(w, r, s3err.ErrInvalidCopySource)
return
}
entry.Extended = weed_server.SaveAmzMetaData(r, entry.Extended, isReplace(r))
err = s3a.touch(dir, name, entry)
if err != nil {
s3err.WriteErrorResponse(w, r, s3err.ErrInvalidCopySource)
return
}
writeSuccessResponseXML(w, r, CopyObjectResult{
ETag: fmt.Sprintf("%x", entry.Attributes.Md5),
LastModified: time.Now().UTC(),
})
return
}
// If source object is empty or bucket is empty, reply back invalid copy source.
if srcObject == "" || srcBucket == "" {
s3err.WriteErrorResponse(w, r, s3err.ErrInvalidCopySource)
return
}
srcPath := util.FullPath(fmt.Sprintf("%s/%s%s", s3a.option.BucketsPath, srcBucket, srcObject))
dir, name := srcPath.DirAndName()
_, err = s3a.getEntry(dir, name)
if err != nil {
s3err.WriteErrorResponse(w, r, s3err.ErrInvalidCopySource)
return
}
if srcBucket == dstBucket && srcObject == dstObject {
s3err.WriteErrorResponse(w, r, s3err.ErrInvalidCopyDest)
return
}
dstUrl := fmt.Sprintf("http://%s%s/%s%s?collection=%s",
s3a.option.Filer.ToHttpAddress(), s3a.option.BucketsPath, dstBucket, urlPathEscape(dstObject), dstBucket)
srcUrl := fmt.Sprintf("http://%s%s/%s%s",
s3a.option.Filer.ToHttpAddress(), s3a.option.BucketsPath, srcBucket, urlPathEscape(srcObject))
_, _, resp, err := util.DownloadFile(srcUrl, s3a.maybeGetFilerJwtAuthorizationToken(false))
if err != nil {
s3err.WriteErrorResponse(w, r, s3err.ErrInvalidCopySource)
return
}
defer util.CloseResponse(resp)
glog.V(2).Infof("copy from %s to %s", srcUrl, dstUrl)
etag, errCode := s3a.putToFiler(r, dstUrl, resp.Body)
if errCode != s3err.ErrNone {
s3err.WriteErrorResponse(w, r, errCode)
return
}
setEtag(w, etag)
response := CopyObjectResult{
ETag: etag,
LastModified: time.Now().UTC(),
}
writeSuccessResponseXML(w, r, response)
}
func pathToBucketAndObject(path string) (bucket, object string) {
path = strings.TrimPrefix(path, "/")
parts := strings.SplitN(path, "/", 2)
if len(parts) == 2 {
return parts[0], "/" + parts[1]
}
return parts[0], "/"
}
type CopyPartResult struct {
LastModified time.Time `xml:"LastModified"`
ETag string `xml:"ETag"`
}
func (s3a *S3ApiServer) CopyObjectPartHandler(w http.ResponseWriter, r *http.Request) {
// https://docs.aws.amazon.com/AmazonS3/latest/dev/CopyingObjctsUsingRESTMPUapi.html
// https://docs.aws.amazon.com/AmazonS3/latest/API/API_UploadPartCopy.html
dstBucket, _ := xhttp.GetBucketAndObject(r)
// Copy source path.
cpSrcPath, err := url.QueryUnescape(r.Header.Get("X-Amz-Copy-Source"))
if err != nil {
// Save unescaped string as is.
cpSrcPath = r.Header.Get("X-Amz-Copy-Source")
}
srcBucket, srcObject := pathToBucketAndObject(cpSrcPath)
// If source object is empty or bucket is empty, reply back invalid copy source.
if srcObject == "" || srcBucket == "" {
s3err.WriteErrorResponse(w, r, s3err.ErrInvalidCopySource)
return
}
uploadID := r.URL.Query().Get("uploadId")
partIDString := r.URL.Query().Get("partNumber")
partID, err := strconv.Atoi(partIDString)
if err != nil {
s3err.WriteErrorResponse(w, r, s3err.ErrInvalidPart)
return
}
glog.V(3).Infof("CopyObjectPartHandler %s %s => %s part %d", srcBucket, srcObject, dstBucket, partID)
// check partID with maximum part ID for multipart objects
if partID > globalMaxPartID {
s3err.WriteErrorResponse(w, r, s3err.ErrInvalidMaxParts)
return
}
rangeHeader := r.Header.Get("x-amz-copy-source-range")
dstUrl := fmt.Sprintf("http://%s%s/%s/%04d.part?collection=%s",
s3a.option.Filer.ToHttpAddress(), s3a.genUploadsFolder(dstBucket), uploadID, partID, dstBucket)
srcUrl := fmt.Sprintf("http://%s%s/%s%s",
s3a.option.Filer.ToHttpAddress(), s3a.option.BucketsPath, srcBucket, urlPathEscape(srcObject))
dataReader, err := util.ReadUrlAsReaderCloser(srcUrl, s3a.maybeGetFilerJwtAuthorizationToken(false), rangeHeader)
if err != nil {
s3err.WriteErrorResponse(w, r, s3err.ErrInvalidCopySource)
return
}
defer dataReader.Close()
glog.V(2).Infof("copy from %s to %s", srcUrl, dstUrl)
etag, errCode := s3a.putToFiler(r, dstUrl, dataReader)
if errCode != s3err.ErrNone {
s3err.WriteErrorResponse(w, r, errCode)
return
}
setEtag(w, etag)
response := CopyPartResult{
ETag: etag,
LastModified: time.Now().UTC(),
}
writeSuccessResponseXML(w, r, response)
}
func isReplace(r *http.Request) bool {
return r.Header.Get("X-Amz-Metadata-Directive") == "REPLACE"
}