minio/cmd/object-api-options.go
poornas 79e21601b0
fix: web handlers to enforce replication (#10249)
This PR also preserves source ETag for replication
2020-08-12 17:32:24 -07:00

249 lines
7.0 KiB
Go

/*
* MinIO Cloud Storage, (C) 2017-2020 MinIO, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package cmd
import (
"context"
"fmt"
"net/http"
"strconv"
"strings"
"time"
"github.com/google/uuid"
"github.com/minio/minio-go/v7/pkg/encrypt"
"github.com/minio/minio/cmd/crypto"
xhttp "github.com/minio/minio/cmd/http"
"github.com/minio/minio/cmd/logger"
)
// set encryption options for pass through to backend in the case of gateway and UserDefined metadata
func getDefaultOpts(header http.Header, copySource bool, metadata map[string]string) (opts ObjectOptions, err error) {
var clientKey [32]byte
var sse encrypt.ServerSide
opts = ObjectOptions{UserDefined: metadata}
if copySource {
if crypto.SSECopy.IsRequested(header) {
clientKey, err = crypto.SSECopy.ParseHTTP(header)
if err != nil {
return
}
if sse, err = encrypt.NewSSEC(clientKey[:]); err != nil {
return
}
opts.ServerSideEncryption = encrypt.SSECopy(sse)
return
}
return
}
if crypto.SSEC.IsRequested(header) {
clientKey, err = crypto.SSEC.ParseHTTP(header)
if err != nil {
return
}
if sse, err = encrypt.NewSSEC(clientKey[:]); err != nil {
return
}
opts.ServerSideEncryption = sse
return
}
if crypto.S3.IsRequested(header) || (metadata != nil && crypto.S3.IsEncrypted(metadata)) {
opts.ServerSideEncryption = encrypt.NewSSE()
}
return
}
// get ObjectOptions for GET calls from encryption headers
func getOpts(ctx context.Context, r *http.Request, bucket, object string) (ObjectOptions, error) {
var (
encryption encrypt.ServerSide
opts ObjectOptions
)
var partNumber int
var err error
if pn := r.URL.Query().Get(xhttp.PartNumber); pn != "" {
partNumber, err = strconv.Atoi(pn)
if err != nil {
return opts, err
}
if partNumber <= 0 {
return opts, errInvalidArgument
}
}
vid := strings.TrimSpace(r.URL.Query().Get(xhttp.VersionID))
if vid != "" && vid != nullVersionID {
_, err := uuid.Parse(vid)
if err != nil {
logger.LogIf(ctx, err)
return opts, VersionNotFound{
Bucket: bucket,
Object: object,
VersionID: vid,
}
}
}
if GlobalGatewaySSE.SSEC() && crypto.SSEC.IsRequested(r.Header) {
key, err := crypto.SSEC.ParseHTTP(r.Header)
if err != nil {
return opts, err
}
derivedKey := deriveClientKey(key, bucket, object)
encryption, err = encrypt.NewSSEC(derivedKey[:])
logger.CriticalIf(ctx, err)
return ObjectOptions{
ServerSideEncryption: encryption,
VersionID: vid,
PartNumber: partNumber,
}, nil
}
// default case of passing encryption headers to backend
opts, err = getDefaultOpts(r.Header, false, nil)
if err != nil {
return opts, err
}
opts.PartNumber = partNumber
opts.VersionID = vid
return opts, nil
}
func delOpts(ctx context.Context, r *http.Request, bucket, object string) (opts ObjectOptions, err error) {
versioned := globalBucketVersioningSys.Enabled(bucket)
opts, err = getOpts(ctx, r, bucket, object)
if err != nil {
return opts, err
}
opts.Versioned = versioned
return opts, nil
}
// get ObjectOptions for PUT calls from encryption headers and metadata
func putOpts(ctx context.Context, r *http.Request, bucket, object string, metadata map[string]string) (opts ObjectOptions, err error) {
versioned := globalBucketVersioningSys.Enabled(bucket)
vid := strings.TrimSpace(r.URL.Query().Get(xhttp.VersionID))
if vid != "" && vid != nullVersionID {
_, err := uuid.Parse(vid)
if err != nil {
logger.LogIf(ctx, err)
return opts, VersionNotFound{
Bucket: bucket,
Object: object,
VersionID: vid,
}
}
}
mtime := strings.TrimSpace(r.Header.Get(xhttp.MinIOSourceMTime))
if mtime != "" {
opts.MTime, err = time.Parse(time.RFC3339, mtime)
if err != nil {
return opts, InvalidArgument{
Bucket: bucket,
Object: object,
Err: fmt.Errorf("Unable to parse %s, failed with %w", xhttp.MinIOSourceMTime, err),
}
}
} else {
opts.MTime = UTCNow()
}
etag := strings.TrimSpace(r.Header.Get(xhttp.MinIOSourceETag))
if etag != "" {
if metadata == nil {
metadata = make(map[string]string)
}
metadata["etag"] = etag
}
// In the case of multipart custom format, the metadata needs to be checked in addition to header to see if it
// is SSE-S3 encrypted, primarily because S3 protocol does not require SSE-S3 headers in PutObjectPart calls
if GlobalGatewaySSE.SSES3() && (crypto.S3.IsRequested(r.Header) || crypto.S3.IsEncrypted(metadata)) {
return ObjectOptions{
ServerSideEncryption: encrypt.NewSSE(),
UserDefined: metadata,
VersionID: vid,
Versioned: versioned,
}, nil
}
if GlobalGatewaySSE.SSEC() && crypto.SSEC.IsRequested(r.Header) {
opts, err = getOpts(ctx, r, bucket, object)
opts.VersionID = vid
opts.Versioned = versioned
opts.UserDefined = metadata
return
}
if crypto.S3KMS.IsRequested(r.Header) {
keyID, context, err := crypto.S3KMS.ParseHTTP(r.Header)
if err != nil {
return ObjectOptions{}, err
}
sseKms, err := encrypt.NewSSEKMS(keyID, context)
if err != nil {
return ObjectOptions{}, err
}
return ObjectOptions{
ServerSideEncryption: sseKms,
UserDefined: metadata,
VersionID: vid,
Versioned: versioned,
}, nil
}
// default case of passing encryption headers and UserDefined metadata to backend
opts, err = getDefaultOpts(r.Header, false, metadata)
if err != nil {
return opts, err
}
opts.VersionID = vid
opts.Versioned = versioned
return opts, nil
}
// get ObjectOptions for Copy calls with encryption headers provided on the target side and source side metadata
func copyDstOpts(ctx context.Context, r *http.Request, bucket, object string, metadata map[string]string) (opts ObjectOptions, err error) {
return putOpts(ctx, r, bucket, object, metadata)
}
// get ObjectOptions for Copy calls with encryption headers provided on the source side
func copySrcOpts(ctx context.Context, r *http.Request, bucket, object string) (ObjectOptions, error) {
var (
ssec encrypt.ServerSide
opts ObjectOptions
)
if GlobalGatewaySSE.SSEC() && crypto.SSECopy.IsRequested(r.Header) {
key, err := crypto.SSECopy.ParseHTTP(r.Header)
if err != nil {
return opts, err
}
derivedKey := deriveClientKey(key, bucket, object)
ssec, err = encrypt.NewSSEC(derivedKey[:])
if err != nil {
return opts, err
}
return ObjectOptions{ServerSideEncryption: encrypt.SSECopy(ssec)}, nil
}
// default case of passing encryption headers to backend
opts, err := getDefaultOpts(r.Header, false, nil)
if err != nil {
return opts, err
}
return opts, nil
}