minio/cmd/web-handlers.go
Harshavardhana 5353edcc38
Support policy variable replacement (#7085)
This PR supports iam and bucket policies to have
policy variable replacements in resource and
condition key values.

For example
- ${aws:username}
- ${aws:userid}
2019-01-21 10:27:14 +05:30

1918 lines
55 KiB
Go

/*
* Minio Cloud Storage, (C) 2016, 2017, 2018 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 (
"archive/zip"
"context"
"encoding/json"
"fmt"
"io"
"net"
"net/http"
"net/url"
"os"
"path"
"runtime"
"strconv"
"strings"
"sync"
"time"
humanize "github.com/dustin/go-humanize"
snappy "github.com/golang/snappy"
"github.com/gorilla/mux"
"github.com/gorilla/rpc/v2/json2"
miniogopolicy "github.com/minio/minio-go/pkg/policy"
"github.com/minio/minio-go/pkg/s3utils"
"github.com/minio/minio/browser"
"github.com/minio/minio/cmd/crypto"
"github.com/minio/minio/cmd/logger"
"github.com/minio/minio/pkg/auth"
"github.com/minio/minio/pkg/dns"
"github.com/minio/minio/pkg/event"
"github.com/minio/minio/pkg/handlers"
"github.com/minio/minio/pkg/hash"
"github.com/minio/minio/pkg/iam/policy"
"github.com/minio/minio/pkg/ioutil"
"github.com/minio/minio/pkg/policy"
)
// WebGenericArgs - empty struct for calls that don't accept arguments
// for ex. ServerInfo, GenerateAuth
type WebGenericArgs struct{}
// WebGenericRep - reply structure for calls for which reply is success/failure
// for ex. RemoveObject MakeBucket
type WebGenericRep struct {
UIVersion string `json:"uiVersion"`
}
// ServerInfoRep - server info reply.
type ServerInfoRep struct {
MinioVersion string
MinioMemory string
MinioPlatform string
MinioRuntime string
MinioGlobalInfo map[string]interface{}
UIVersion string `json:"uiVersion"`
}
// ServerInfo - get server info.
func (web *webAPIHandlers) ServerInfo(r *http.Request, args *WebGenericArgs, reply *ServerInfoRep) error {
_, owner, authErr := webRequestAuthenticate(r)
if authErr != nil {
return toJSONError(authErr)
}
host, err := os.Hostname()
if err != nil {
host = ""
}
memstats := &runtime.MemStats{}
runtime.ReadMemStats(memstats)
mem := fmt.Sprintf("Used: %s | Allocated: %s | Used-Heap: %s | Allocated-Heap: %s",
humanize.Bytes(memstats.Alloc),
humanize.Bytes(memstats.TotalAlloc),
humanize.Bytes(memstats.HeapAlloc),
humanize.Bytes(memstats.HeapSys))
platform := fmt.Sprintf("Host: %s | OS: %s | Arch: %s",
host,
runtime.GOOS,
runtime.GOARCH)
goruntime := fmt.Sprintf("Version: %s | CPUs: %s", runtime.Version(), strconv.Itoa(runtime.NumCPU()))
reply.MinioVersion = Version
reply.MinioGlobalInfo = getGlobalInfo()
// If ENV creds are not set and incoming user is not owner
// disable changing credentials.
v, ok := reply.MinioGlobalInfo["isEnvCreds"].(bool)
if ok && !v {
reply.MinioGlobalInfo["isEnvCreds"] = !owner
}
// if etcd is set disallow changing credentials through UI
if globalEtcdClient != nil {
reply.MinioGlobalInfo["isEnvCreds"] = true
}
reply.MinioMemory = mem
reply.MinioPlatform = platform
reply.MinioRuntime = goruntime
reply.UIVersion = browser.UIVersion
return nil
}
// StorageInfoRep - contains storage usage statistics.
type StorageInfoRep struct {
StorageInfo StorageInfo `json:"storageInfo"`
UIVersion string `json:"uiVersion"`
}
// StorageInfo - web call to gather storage usage statistics.
func (web *webAPIHandlers) StorageInfo(r *http.Request, args *AuthArgs, reply *StorageInfoRep) error {
objectAPI := web.ObjectAPI()
if objectAPI == nil {
return toJSONError(errServerNotInitialized)
}
_, _, authErr := webRequestAuthenticate(r)
if authErr != nil {
return toJSONError(authErr)
}
reply.StorageInfo = objectAPI.StorageInfo(context.Background())
reply.UIVersion = browser.UIVersion
return nil
}
// MakeBucketArgs - make bucket args.
type MakeBucketArgs struct {
BucketName string `json:"bucketName"`
}
// MakeBucket - creates a new bucket.
func (web *webAPIHandlers) MakeBucket(r *http.Request, args *MakeBucketArgs, reply *WebGenericRep) error {
objectAPI := web.ObjectAPI()
if objectAPI == nil {
return toJSONError(errServerNotInitialized)
}
_, owner, authErr := webRequestAuthenticate(r)
if authErr != nil {
return toJSONError(authErr)
}
if !owner {
return toJSONError(errAccessDenied)
}
// Check if bucket is a reserved bucket name or invalid.
if isReservedOrInvalidBucket(args.BucketName) {
return toJSONError(errInvalidBucketName)
}
if globalDNSConfig != nil {
if _, err := globalDNSConfig.Get(args.BucketName); err != nil {
if err == dns.ErrNoEntriesFound {
// Proceed to creating a bucket.
if err = objectAPI.MakeBucketWithLocation(context.Background(), args.BucketName, globalServerConfig.GetRegion()); err != nil {
return toJSONError(err)
}
if err = globalDNSConfig.Put(args.BucketName); err != nil {
objectAPI.DeleteBucket(context.Background(), args.BucketName)
return toJSONError(err)
}
reply.UIVersion = browser.UIVersion
return nil
}
return toJSONError(err)
}
return toJSONError(errBucketAlreadyExists)
}
if err := objectAPI.MakeBucketWithLocation(context.Background(), args.BucketName, globalServerConfig.GetRegion()); err != nil {
return toJSONError(err, args.BucketName)
}
reply.UIVersion = browser.UIVersion
return nil
}
// RemoveBucketArgs - remove bucket args.
type RemoveBucketArgs struct {
BucketName string `json:"bucketName"`
}
// DeleteBucket - removes a bucket, must be empty.
func (web *webAPIHandlers) DeleteBucket(r *http.Request, args *RemoveBucketArgs, reply *WebGenericRep) error {
objectAPI := web.ObjectAPI()
if objectAPI == nil {
return toJSONError(errServerNotInitialized)
}
_, owner, authErr := webRequestAuthenticate(r)
if authErr != nil {
return toJSONError(authErr)
}
if !owner {
return toJSONError(errAccessDenied)
}
reply.UIVersion = browser.UIVersion
if isRemoteCallRequired(context.Background(), args.BucketName, objectAPI) {
sr, err := globalDNSConfig.Get(args.BucketName)
if err != nil {
if err == dns.ErrNoEntriesFound {
return toJSONError(BucketNotFound{
Bucket: args.BucketName,
}, args.BucketName)
}
return toJSONError(err, args.BucketName)
}
core, err := getRemoteInstanceClient(r, getHostFromSrv(sr))
if err != nil {
return toJSONError(err, args.BucketName)
}
if err = core.RemoveBucket(args.BucketName); err != nil {
return toJSONError(err, args.BucketName)
}
return nil
}
ctx := context.Background()
deleteBucket := objectAPI.DeleteBucket
if web.CacheAPI() != nil {
deleteBucket = web.CacheAPI().DeleteBucket
}
if err := deleteBucket(ctx, args.BucketName); err != nil {
return toJSONError(err, args.BucketName)
}
globalNotificationSys.RemoveNotification(args.BucketName)
globalPolicySys.Remove(args.BucketName)
globalNotificationSys.DeleteBucket(ctx, args.BucketName)
if globalDNSConfig != nil {
if err := globalDNSConfig.Delete(args.BucketName); err != nil {
// Deleting DNS entry failed, attempt to create the bucket again.
objectAPI.MakeBucketWithLocation(ctx, args.BucketName, "")
return toJSONError(err)
}
}
return nil
}
// ListBucketsRep - list buckets response
type ListBucketsRep struct {
Buckets []WebBucketInfo `json:"buckets"`
UIVersion string `json:"uiVersion"`
}
// WebBucketInfo container for list buckets metadata.
type WebBucketInfo struct {
// The name of the bucket.
Name string `json:"name"`
// Date the bucket was created.
CreationDate time.Time `json:"creationDate"`
}
// ListBuckets - list buckets api.
func (web *webAPIHandlers) ListBuckets(r *http.Request, args *WebGenericArgs, reply *ListBucketsRep) error {
objectAPI := web.ObjectAPI()
if objectAPI == nil {
return toJSONError(errServerNotInitialized)
}
listBuckets := objectAPI.ListBuckets
if web.CacheAPI() != nil {
listBuckets = web.CacheAPI().ListBuckets
}
claims, owner, authErr := webRequestAuthenticate(r)
if authErr != nil {
return toJSONError(authErr)
}
// Set prefix value for "s3:prefix" policy conditionals.
r.Header.Set("prefix", "")
// Set delimiter value for "s3:delimiter" policy conditionals.
r.Header.Set("delimiter", slashSeparator)
// If etcd, dns federation configured list buckets from etcd.
if globalDNSConfig != nil {
dnsBuckets, err := globalDNSConfig.List()
if err != nil {
return toJSONError(err)
}
for _, dnsRecord := range dnsBuckets {
bucketName := strings.Trim(dnsRecord.Key, "/")
if globalIAMSys.IsAllowed(iampolicy.Args{
AccountName: claims.Subject,
Action: iampolicy.ListBucketAction,
BucketName: bucketName,
ConditionValues: getConditionValues(r, "", claims.Subject),
IsOwner: owner,
ObjectName: "",
}) {
reply.Buckets = append(reply.Buckets, WebBucketInfo{
Name: bucketName,
CreationDate: dnsRecord.CreationDate,
})
}
}
} else {
buckets, err := listBuckets(context.Background())
if err != nil {
return toJSONError(err)
}
for _, bucket := range buckets {
if globalIAMSys.IsAllowed(iampolicy.Args{
AccountName: claims.Subject,
Action: iampolicy.ListBucketAction,
BucketName: bucket.Name,
ConditionValues: getConditionValues(r, "", claims.Subject),
IsOwner: owner,
ObjectName: "",
}) {
reply.Buckets = append(reply.Buckets, WebBucketInfo{
Name: bucket.Name,
CreationDate: bucket.Created,
})
}
}
}
reply.UIVersion = browser.UIVersion
return nil
}
// ListObjectsArgs - list object args.
type ListObjectsArgs struct {
BucketName string `json:"bucketName"`
Prefix string `json:"prefix"`
Marker string `json:"marker"`
}
// ListObjectsRep - list objects response.
type ListObjectsRep struct {
Objects []WebObjectInfo `json:"objects"`
NextMarker string `json:"nextmarker"`
IsTruncated bool `json:"istruncated"`
Writable bool `json:"writable"` // Used by client to show "upload file" button.
UIVersion string `json:"uiVersion"`
}
// WebObjectInfo container for list objects metadata.
type WebObjectInfo struct {
// Name of the object
Key string `json:"name"`
// Date and time the object was last modified.
LastModified time.Time `json:"lastModified"`
// Size in bytes of the object.
Size int64 `json:"size"`
// ContentType is mime type of the object.
ContentType string `json:"contentType"`
}
// ListObjects - list objects api.
func (web *webAPIHandlers) ListObjects(r *http.Request, args *ListObjectsArgs, reply *ListObjectsRep) error {
reply.UIVersion = browser.UIVersion
objectAPI := web.ObjectAPI()
if objectAPI == nil {
return toJSONError(errServerNotInitialized)
}
listObjects := objectAPI.ListObjects
if web.CacheAPI() != nil {
listObjects = web.CacheAPI().ListObjects
}
if isRemoteCallRequired(context.Background(), args.BucketName, objectAPI) {
sr, err := globalDNSConfig.Get(args.BucketName)
if err != nil {
if err == dns.ErrNoEntriesFound {
return toJSONError(BucketNotFound{
Bucket: args.BucketName,
}, args.BucketName)
}
return toJSONError(err, args.BucketName)
}
core, err := getRemoteInstanceClient(r, getHostFromSrv(sr))
if err != nil {
return toJSONError(err, args.BucketName)
}
result, err := core.ListObjects(args.BucketName, args.Prefix, args.Marker, slashSeparator, 1000)
if err != nil {
return toJSONError(err, args.BucketName)
}
reply.NextMarker = result.NextMarker
reply.IsTruncated = result.IsTruncated
for _, obj := range result.Contents {
reply.Objects = append(reply.Objects, WebObjectInfo{
Key: obj.Key,
LastModified: obj.LastModified,
Size: obj.Size,
ContentType: obj.ContentType,
})
}
for _, p := range result.CommonPrefixes {
reply.Objects = append(reply.Objects, WebObjectInfo{
Key: p.Prefix,
})
}
return nil
}
claims, owner, authErr := webRequestAuthenticate(r)
if authErr != nil {
if authErr == errNoAuthToken {
// Set prefix value for "s3:prefix" policy conditionals.
r.Header.Set("prefix", args.Prefix)
// Set delimiter value for "s3:delimiter" policy conditionals.
r.Header.Set("delimiter", slashSeparator)
// Check if anonymous (non-owner) has access to download objects.
readable := globalPolicySys.IsAllowed(policy.Args{
Action: policy.ListBucketAction,
BucketName: args.BucketName,
ConditionValues: getConditionValues(r, "", ""),
IsOwner: false,
})
// Check if anonymous (non-owner) has access to upload objects.
writable := globalPolicySys.IsAllowed(policy.Args{
Action: policy.PutObjectAction,
BucketName: args.BucketName,
ConditionValues: getConditionValues(r, "", ""),
IsOwner: false,
ObjectName: args.Prefix + "/",
})
reply.Writable = writable
if !readable {
// Error out if anonymous user (non-owner) has no access to download or upload objects
if !writable {
return errAccessDenied
}
// return empty object list if access is write only
return nil
}
} else {
return toJSONError(authErr)
}
}
// For authenticated users apply IAM policy.
if authErr == nil {
// Set prefix value for "s3:prefix" policy conditionals.
r.Header.Set("prefix", args.Prefix)
// Set delimiter value for "s3:delimiter" policy conditionals.
r.Header.Set("delimiter", slashSeparator)
readable := globalIAMSys.IsAllowed(iampolicy.Args{
AccountName: claims.Subject,
Action: iampolicy.ListBucketAction,
BucketName: args.BucketName,
ConditionValues: getConditionValues(r, "", ""),
IsOwner: owner,
})
writable := globalIAMSys.IsAllowed(iampolicy.Args{
AccountName: claims.Subject,
Action: iampolicy.PutObjectAction,
BucketName: args.BucketName,
ConditionValues: getConditionValues(r, "", ""),
IsOwner: owner,
ObjectName: args.Prefix + "/",
})
reply.Writable = writable
if !readable {
// Error out if anonymous user (non-owner) has no access to download or upload objects
if !writable {
return errAccessDenied
}
// return empty object list if access is write only
return nil
}
}
lo, err := listObjects(context.Background(), args.BucketName, args.Prefix, args.Marker, slashSeparator, 1000)
if err != nil {
return &json2.Error{Message: err.Error()}
}
for i := range lo.Objects {
if crypto.IsEncrypted(lo.Objects[i].UserDefined) {
lo.Objects[i].Size, err = lo.Objects[i].DecryptedSize()
if err != nil {
return toJSONError(err)
}
}
}
reply.NextMarker = lo.NextMarker
reply.IsTruncated = lo.IsTruncated
for _, obj := range lo.Objects {
reply.Objects = append(reply.Objects, WebObjectInfo{
Key: obj.Name,
LastModified: obj.ModTime,
Size: obj.Size,
ContentType: obj.ContentType,
})
}
for _, prefix := range lo.Prefixes {
reply.Objects = append(reply.Objects, WebObjectInfo{
Key: prefix,
})
}
return nil
}
// RemoveObjectArgs - args to remove an object, JSON will look like.
//
// {
// "bucketname": "testbucket",
// "objects": [
// "photos/hawaii/",
// "photos/maldives/",
// "photos/sanjose.jpg"
// ]
// }
type RemoveObjectArgs struct {
Objects []string `json:"objects"` // Contains objects, prefixes.
BucketName string `json:"bucketname"` // Contains bucket name.
}
// RemoveObject - removes an object, or all the objects at a given prefix.
func (web *webAPIHandlers) RemoveObject(r *http.Request, args *RemoveObjectArgs, reply *WebGenericRep) error {
objectAPI := web.ObjectAPI()
if objectAPI == nil {
return toJSONError(errServerNotInitialized)
}
listObjects := objectAPI.ListObjects
if web.CacheAPI() != nil {
listObjects = web.CacheAPI().ListObjects
}
claims, owner, authErr := webRequestAuthenticate(r)
if authErr != nil {
return toJSONError(authErr)
}
if args.BucketName == "" || len(args.Objects) == 0 {
return toJSONError(errInvalidArgument)
}
reply.UIVersion = browser.UIVersion
if isRemoteCallRequired(context.Background(), args.BucketName, objectAPI) {
sr, err := globalDNSConfig.Get(args.BucketName)
if err != nil {
if err == dns.ErrNoEntriesFound {
return toJSONError(BucketNotFound{
Bucket: args.BucketName,
}, args.BucketName)
}
return toJSONError(err, args.BucketName)
}
core, err := getRemoteInstanceClient(r, getHostFromSrv(sr))
if err != nil {
return toJSONError(err, args.BucketName)
}
objectsCh := make(chan string)
// Send object names that are needed to be removed to objectsCh
go func() {
defer close(objectsCh)
for _, objectName := range args.Objects {
objectsCh <- objectName
}
}()
for resp := range core.RemoveObjects(args.BucketName, objectsCh) {
if resp.Err != nil {
return toJSONError(resp.Err, args.BucketName, resp.ObjectName)
}
}
return nil
}
var err error
next:
for _, objectName := range args.Objects {
// If not a directory, remove the object.
if !hasSuffix(objectName, slashSeparator) && objectName != "" {
// Deny if WORM is enabled
if globalWORMEnabled {
if _, err = objectAPI.GetObjectInfo(context.Background(), args.BucketName, objectName, ObjectOptions{}); err == nil {
return toJSONError(errMethodNotAllowed)
}
}
if !globalIAMSys.IsAllowed(iampolicy.Args{
AccountName: claims.Subject,
Action: iampolicy.DeleteObjectAction,
BucketName: args.BucketName,
ConditionValues: getConditionValues(r, "", claims.Subject),
IsOwner: owner,
ObjectName: objectName,
}) {
return toJSONError(errAccessDenied)
}
if err = deleteObject(context.Background(), objectAPI, web.CacheAPI(), args.BucketName, objectName, r); err != nil {
break next
}
continue
}
if !globalIAMSys.IsAllowed(iampolicy.Args{
AccountName: claims.Subject,
Action: iampolicy.DeleteObjectAction,
BucketName: args.BucketName,
ConditionValues: getConditionValues(r, "", claims.Subject),
IsOwner: owner,
ObjectName: objectName,
}) {
return toJSONError(errAccessDenied)
}
// For directories, list the contents recursively and remove.
marker := ""
for {
var lo ListObjectsInfo
lo, err = listObjects(context.Background(), args.BucketName, objectName, marker, "", 1000)
if err != nil {
break next
}
marker = lo.NextMarker
for _, obj := range lo.Objects {
err = deleteObject(context.Background(), objectAPI, web.CacheAPI(), args.BucketName, obj.Name, r)
if err != nil {
break next
}
}
if !lo.IsTruncated {
break
}
}
}
if err != nil && !isErrObjectNotFound(err) {
// Ignore object not found error.
return toJSONError(err, args.BucketName, "")
}
return nil
}
// LoginArgs - login arguments.
type LoginArgs struct {
Username string `json:"username" form:"username"`
Password string `json:"password" form:"password"`
}
// LoginRep - login reply.
type LoginRep struct {
Token string `json:"token"`
UIVersion string `json:"uiVersion"`
}
// Login - user login handler.
func (web *webAPIHandlers) Login(r *http.Request, args *LoginArgs, reply *LoginRep) error {
token, err := authenticateWeb(args.Username, args.Password)
if err != nil {
return toJSONError(err)
}
reply.Token = token
reply.UIVersion = browser.UIVersion
return nil
}
// GenerateAuthReply - reply for GenerateAuth
type GenerateAuthReply struct {
AccessKey string `json:"accessKey"`
SecretKey string `json:"secretKey"`
UIVersion string `json:"uiVersion"`
}
func (web webAPIHandlers) GenerateAuth(r *http.Request, args *WebGenericArgs, reply *GenerateAuthReply) error {
_, owner, authErr := webRequestAuthenticate(r)
if authErr != nil {
return toJSONError(authErr)
}
if !owner {
return toJSONError(errAccessDenied)
}
cred, err := auth.GetNewCredentials()
if err != nil {
return toJSONError(err)
}
reply.AccessKey = cred.AccessKey
reply.SecretKey = cred.SecretKey
reply.UIVersion = browser.UIVersion
return nil
}
// SetAuthArgs - argument for SetAuth
type SetAuthArgs struct {
AccessKey string `json:"accessKey"`
SecretKey string `json:"secretKey"`
}
// SetAuthReply - reply for SetAuth
type SetAuthReply struct {
Token string `json:"token"`
UIVersion string `json:"uiVersion"`
PeerErrMsgs map[string]string `json:"peerErrMsgs"`
}
// SetAuth - Set accessKey and secretKey credentials.
func (web *webAPIHandlers) SetAuth(r *http.Request, args *SetAuthArgs, reply *SetAuthReply) error {
_, owner, authErr := webRequestAuthenticate(r)
if authErr != nil {
return toJSONError(authErr)
}
// If creds are set through ENV disallow changing credentials.
if globalIsEnvCreds || globalWORMEnabled || !owner || globalEtcdClient != nil {
return toJSONError(errChangeCredNotAllowed)
}
creds, err := auth.CreateCredentials(args.AccessKey, args.SecretKey)
if err != nil {
return toJSONError(err)
}
// Acquire lock before updating global configuration.
globalServerConfigMu.Lock()
defer globalServerConfigMu.Unlock()
// Update credentials in memory
prevCred := globalServerConfig.SetCredential(creds)
// Persist updated credentials.
if err = saveServerConfig(context.Background(), newObjectLayerFn(), globalServerConfig); err != nil {
// Save the current creds when failed to update.
globalServerConfig.SetCredential(prevCred)
logger.LogIf(context.Background(), err)
return toJSONError(err)
}
if errs := globalNotificationSys.LoadCredentials(); len(errs) != 0 {
reply.PeerErrMsgs = make(map[string]string)
for _, nerr := range errs {
err = fmt.Errorf("Unable to update credentials on server %v: %v", nerr.Host, nerr.Err)
logger.LogIf(context.Background(), err)
reply.PeerErrMsgs[nerr.Host.String()] = err.Error()
}
} else {
reply.Token, err = authenticateWeb(creds.AccessKey, creds.SecretKey)
if err != nil {
return toJSONError(err)
}
reply.UIVersion = browser.UIVersion
}
return nil
}
// GetAuthReply - Reply current credentials.
type GetAuthReply struct {
AccessKey string `json:"accessKey"`
SecretKey string `json:"secretKey"`
UIVersion string `json:"uiVersion"`
}
// GetAuth - return accessKey and secretKey credentials.
func (web *webAPIHandlers) GetAuth(r *http.Request, args *WebGenericArgs, reply *GetAuthReply) error {
_, owner, authErr := webRequestAuthenticate(r)
if authErr != nil {
return toJSONError(authErr)
}
if !owner {
return toJSONError(errAccessDenied)
}
creds := globalServerConfig.GetCredential()
reply.AccessKey = creds.AccessKey
reply.SecretKey = creds.SecretKey
reply.UIVersion = browser.UIVersion
return nil
}
// URLTokenReply contains the reply for CreateURLToken.
type URLTokenReply struct {
Token string `json:"token"`
UIVersion string `json:"uiVersion"`
}
// CreateURLToken creates a URL token (short-lived) for GET requests.
func (web *webAPIHandlers) CreateURLToken(r *http.Request, args *WebGenericArgs, reply *URLTokenReply) error {
claims, owner, authErr := webRequestAuthenticate(r)
if authErr != nil {
return toJSONError(authErr)
}
creds := globalServerConfig.GetCredential()
if !owner {
var ok bool
creds, ok = globalIAMSys.GetUser(claims.Subject)
if !ok {
return toJSONError(errInvalidAccessKeyID)
}
}
token, err := authenticateURL(creds.AccessKey, creds.SecretKey)
if err != nil {
return toJSONError(err)
}
reply.Token = token
reply.UIVersion = browser.UIVersion
return nil
}
// Upload - file upload handler.
func (web *webAPIHandlers) Upload(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, w, "WebUpload")
defer logger.AuditLog(w, r, "WebUpload", mustGetClaimsFromToken(r))
objectAPI := web.ObjectAPI()
if objectAPI == nil {
writeWebErrorResponse(w, errServerNotInitialized)
return
}
vars := mux.Vars(r)
bucket := vars["bucket"]
object := vars["object"]
claims, owner, authErr := webRequestAuthenticate(r)
if authErr != nil {
if authErr == errNoAuthToken {
// Check if anonymous (non-owner) has access to upload objects.
if !globalPolicySys.IsAllowed(policy.Args{
Action: policy.PutObjectAction,
BucketName: bucket,
ConditionValues: getConditionValues(r, "", ""),
IsOwner: false,
ObjectName: object,
}) {
writeWebErrorResponse(w, errAuthentication)
return
}
} else {
writeWebErrorResponse(w, authErr)
return
}
}
// For authenticated users apply IAM policy.
if authErr == nil {
if !globalIAMSys.IsAllowed(iampolicy.Args{
AccountName: claims.Subject,
Action: iampolicy.PutObjectAction,
BucketName: bucket,
ConditionValues: getConditionValues(r, "", claims.Subject),
IsOwner: owner,
ObjectName: object,
}) {
writeWebErrorResponse(w, errAuthentication)
return
}
}
if globalAutoEncryption && !crypto.SSEC.IsRequested(r.Header) {
r.Header.Add(crypto.SSEHeader, crypto.SSEAlgorithmAES256)
}
// Require Content-Length to be set in the request
size := r.ContentLength
if size < 0 {
writeWebErrorResponse(w, errSizeUnspecified)
return
}
// Extract incoming metadata if any.
metadata, err := extractMetadata(context.Background(), r)
if err != nil {
writeErrorResponse(w, ErrInternalError, r.URL, guessIsBrowserReq(r))
return
}
var pReader *PutObjReader
var reader io.Reader = r.Body
actualSize := size
hashReader, err := hash.NewReader(reader, size, "", "", actualSize)
if err != nil {
writeWebErrorResponse(w, err)
return
}
if objectAPI.IsCompressionSupported() && isCompressible(r.Header, object) && size > 0 {
// Storing the compression metadata.
metadata[ReservedMetadataPrefix+"compression"] = compressionAlgorithmV1
metadata[ReservedMetadataPrefix+"actual-size"] = strconv.FormatInt(size, 10)
pipeReader, pipeWriter := io.Pipe()
snappyWriter := snappy.NewWriter(pipeWriter)
var actualReader *hash.Reader
actualReader, err = hash.NewReader(reader, size, "", "", actualSize)
if err != nil {
writeWebErrorResponse(w, err)
return
}
go func() {
// Writing to the compressed writer.
_, cerr := io.CopyN(snappyWriter, actualReader, actualSize)
snappyWriter.Close()
pipeWriter.CloseWithError(cerr)
}()
// Set compression metrics.
size = -1 // Since compressed size is un-predictable.
reader = pipeReader
hashReader, err = hash.NewReader(reader, size, "", "", actualSize)
if err != nil {
writeWebErrorResponse(w, err)
return
}
}
pReader = NewPutObjReader(hashReader, nil, nil)
// get gateway encryption options
var opts ObjectOptions
opts, err = putEncryptionOpts(ctx, r, bucket, object, nil)
if err != nil {
writeErrorResponseHeadersOnly(w, toAPIErrorCode(ctx, err))
return
}
if objectAPI.IsEncryptionSupported() {
if hasServerSideEncryptionHeader(r.Header) && !hasSuffix(object, slashSeparator) { // handle SSE requests
rawReader := hashReader
var objectEncryptionKey []byte
reader, objectEncryptionKey, err = EncryptRequest(hashReader, r, bucket, object, metadata)
if err != nil {
writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
return
}
info := ObjectInfo{Size: size}
hashReader, err = hash.NewReader(reader, info.EncryptedSize(), "", "", size) // do not try to verify encrypted content
if err != nil {
writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
return
}
pReader = NewPutObjReader(rawReader, hashReader, objectEncryptionKey)
}
}
// Ensure that metadata does not contain sensitive information
crypto.RemoveSensitiveEntries(metadata)
// Deny if WORM is enabled
if globalWORMEnabled {
if _, err = objectAPI.GetObjectInfo(ctx, bucket, object, opts); err == nil {
writeWebErrorResponse(w, errMethodNotAllowed)
return
}
}
putObject := objectAPI.PutObject
if !hasServerSideEncryptionHeader(r.Header) && web.CacheAPI() != nil {
putObject = web.CacheAPI().PutObject
}
objInfo, err := putObject(context.Background(), bucket, object, pReader, metadata, opts)
if err != nil {
writeWebErrorResponse(w, err)
return
}
if objectAPI.IsEncryptionSupported() {
if crypto.IsEncrypted(objInfo.UserDefined) {
switch {
case crypto.S3.IsEncrypted(objInfo.UserDefined):
w.Header().Set(crypto.SSEHeader, crypto.SSEAlgorithmAES256)
case crypto.SSEC.IsRequested(r.Header):
w.Header().Set(crypto.SSECAlgorithm, r.Header.Get(crypto.SSECAlgorithm))
w.Header().Set(crypto.SSECKeyMD5, r.Header.Get(crypto.SSECKeyMD5))
}
}
}
// Get host and port from Request.RemoteAddr.
host, port, err := net.SplitHostPort(handlers.GetSourceIP(r))
if err != nil {
host, port = "", ""
}
// Notify object created event.
sendEvent(eventArgs{
EventName: event.ObjectCreatedPut,
BucketName: bucket,
Object: objInfo,
ReqParams: extractReqParams(r),
RespElements: extractRespElements(w),
UserAgent: r.UserAgent(),
Host: host,
Port: port,
})
}
// Download - file download handler.
func (web *webAPIHandlers) Download(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, w, "WebDownload")
defer logger.AuditLog(w, r, "WebDownload", mustGetClaimsFromToken(r))
objectAPI := web.ObjectAPI()
if objectAPI == nil {
writeWebErrorResponse(w, errServerNotInitialized)
return
}
vars := mux.Vars(r)
bucket := vars["bucket"]
object := vars["object"]
token := r.URL.Query().Get("token")
claims, owner, authErr := webTokenAuthenticate(token)
if authErr != nil {
if authErr == errNoAuthToken {
// Check if anonymous (non-owner) has access to download objects.
if !globalPolicySys.IsAllowed(policy.Args{
Action: policy.GetObjectAction,
BucketName: bucket,
ConditionValues: getConditionValues(r, "", ""),
IsOwner: false,
ObjectName: object,
}) {
writeWebErrorResponse(w, errAuthentication)
return
}
} else {
writeWebErrorResponse(w, authErr)
return
}
}
// For authenticated users apply IAM policy.
if authErr == nil {
if !globalIAMSys.IsAllowed(iampolicy.Args{
AccountName: claims.Subject,
Action: iampolicy.GetObjectAction,
BucketName: bucket,
ConditionValues: getConditionValues(r, "", claims.Subject),
IsOwner: owner,
ObjectName: object,
}) {
writeWebErrorResponse(w, errAuthentication)
return
}
}
getObjectNInfo := objectAPI.GetObjectNInfo
if web.CacheAPI() != nil {
getObjectNInfo = web.CacheAPI().GetObjectNInfo
}
var opts ObjectOptions
gr, err := getObjectNInfo(ctx, bucket, object, nil, r.Header, readLock, opts)
if err != nil {
writeWebErrorResponse(w, err)
return
}
defer gr.Close()
objInfo := gr.ObjInfo
if objectAPI.IsEncryptionSupported() {
if _, err = DecryptObjectInfo(&objInfo, r.Header); err != nil {
writeWebErrorResponse(w, err)
return
}
}
// Set encryption response headers
if objectAPI.IsEncryptionSupported() {
if crypto.IsEncrypted(objInfo.UserDefined) {
switch {
case crypto.S3.IsEncrypted(objInfo.UserDefined):
w.Header().Set(crypto.SSEHeader, crypto.SSEAlgorithmAES256)
case crypto.SSEC.IsEncrypted(objInfo.UserDefined):
w.Header().Set(crypto.SSECAlgorithm, r.Header.Get(crypto.SSECAlgorithm))
w.Header().Set(crypto.SSECKeyMD5, r.Header.Get(crypto.SSECKeyMD5))
}
}
}
if err = setObjectHeaders(w, objInfo, nil); err != nil {
writeWebErrorResponse(w, err)
return
}
// Add content disposition.
w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s\"", path.Base(objInfo.Name)))
setHeadGetRespHeaders(w, r.URL.Query())
httpWriter := ioutil.WriteOnClose(w)
// Write object content to response body
if _, err = io.Copy(httpWriter, gr); err != nil {
if !httpWriter.HasWritten() { // write error response only if no data or headers has been written to client yet
writeWebErrorResponse(w, err)
}
return
}
if err = httpWriter.Close(); err != nil {
if !httpWriter.HasWritten() { // write error response only if no data or headers has been written to client yet
writeWebErrorResponse(w, err)
return
}
}
// Get host and port from Request.RemoteAddr.
host, port, err := net.SplitHostPort(handlers.GetSourceIP(r))
if err != nil {
host, port = "", ""
}
// Notify object accessed via a GET request.
sendEvent(eventArgs{
EventName: event.ObjectAccessedGet,
BucketName: bucket,
Object: objInfo,
ReqParams: extractReqParams(r),
RespElements: extractRespElements(w),
UserAgent: r.UserAgent(),
Host: host,
Port: port,
})
}
// DownloadZipArgs - Argument for downloading a bunch of files as a zip file.
// JSON will look like:
// '{"bucketname":"testbucket","prefix":"john/pics/","objects":["hawaii/","maldives/","sanjose.jpg"]}'
type DownloadZipArgs struct {
Objects []string `json:"objects"` // can be files or sub-directories
Prefix string `json:"prefix"` // current directory in the browser-ui
BucketName string `json:"bucketname"` // bucket name.
}
// Takes a list of objects and creates a zip file that sent as the response body.
func (web *webAPIHandlers) DownloadZip(w http.ResponseWriter, r *http.Request) {
// Get host and port from Request.RemoteAddr.
host, port, err := net.SplitHostPort(handlers.GetSourceIP(r))
if err != nil {
host, port = "", ""
}
ctx := newContext(r, w, "WebDownloadZip")
defer logger.AuditLog(w, r, "WebDownloadZip", mustGetClaimsFromToken(r))
var wg sync.WaitGroup
objectAPI := web.ObjectAPI()
if objectAPI == nil {
writeWebErrorResponse(w, errServerNotInitialized)
return
}
// Auth is done after reading the body to accommodate for anonymous requests
// when bucket policy is enabled.
var args DownloadZipArgs
tenKB := 10 * 1024 // To limit r.Body to take care of misbehaving anonymous client.
decodeErr := json.NewDecoder(io.LimitReader(r.Body, int64(tenKB))).Decode(&args)
if decodeErr != nil {
writeWebErrorResponse(w, decodeErr)
return
}
token := r.URL.Query().Get("token")
claims, owner, authErr := webTokenAuthenticate(token)
if authErr != nil {
if authErr == errNoAuthToken {
for _, object := range args.Objects {
// Check if anonymous (non-owner) has access to download objects.
if !globalPolicySys.IsAllowed(policy.Args{
Action: policy.GetObjectAction,
BucketName: args.BucketName,
ConditionValues: getConditionValues(r, "", ""),
IsOwner: false,
ObjectName: pathJoin(args.Prefix, object),
}) {
writeWebErrorResponse(w, errAuthentication)
return
}
}
} else {
writeWebErrorResponse(w, authErr)
return
}
}
// For authenticated users apply IAM policy.
if authErr == nil {
for _, object := range args.Objects {
if !globalIAMSys.IsAllowed(iampolicy.Args{
AccountName: claims.Subject,
Action: iampolicy.GetObjectAction,
BucketName: args.BucketName,
ConditionValues: getConditionValues(r, "", claims.Subject),
IsOwner: owner,
ObjectName: pathJoin(args.Prefix, object),
}) {
writeWebErrorResponse(w, errAuthentication)
return
}
}
}
getObject := objectAPI.GetObject
if web.CacheAPI() != nil {
getObject = web.CacheAPI().GetObject
}
listObjects := objectAPI.ListObjects
if web.CacheAPI() != nil {
listObjects = web.CacheAPI().ListObjects
}
archive := zip.NewWriter(w)
defer archive.Close()
getObjectInfo := objectAPI.GetObjectInfo
if web.CacheAPI() != nil {
getObjectInfo = web.CacheAPI().GetObjectInfo
}
opts := ObjectOptions{}
var length int64
for _, object := range args.Objects {
// Writes compressed object file to the response.
zipit := func(objectName string) error {
info, err := getObjectInfo(ctx, args.BucketName, objectName, opts)
if err != nil {
return err
}
length = info.Size
if objectAPI.IsEncryptionSupported() {
if _, err = DecryptObjectInfo(&info, r.Header); err != nil {
writeWebErrorResponse(w, err)
return err
}
if crypto.IsEncrypted(info.UserDefined) {
length, _ = info.DecryptedSize()
}
}
length = info.Size
var actualSize int64
if info.IsCompressed() {
// Read the decompressed size from the meta.json.
actualSize = info.GetActualSize()
// Set the info.Size to the actualSize.
info.Size = actualSize
}
header := &zip.FileHeader{
Name: strings.TrimPrefix(objectName, args.Prefix),
Method: zip.Deflate,
UncompressedSize64: uint64(length),
UncompressedSize: uint32(length),
}
zipWriter, err := archive.CreateHeader(header)
if err != nil {
writeWebErrorResponse(w, errUnexpected)
return err
}
var startOffset int64
var writer io.Writer
if info.IsCompressed() {
// The decompress metrics are set.
snappyStartOffset := 0
snappyLength := actualSize
// Open a pipe for compression
// Where compressWriter is actually passed to the getObject
decompressReader, compressWriter := io.Pipe()
snappyReader := snappy.NewReader(decompressReader)
// The limit is set to the actual size.
responseWriter := ioutil.LimitedWriter(zipWriter, int64(snappyStartOffset), snappyLength)
wg.Add(1) //For closures.
go func() {
defer wg.Done()
// Finally, writes to the client.
_, perr := io.Copy(responseWriter, snappyReader)
// Close the compressWriter if the data is read already.
// Closing the pipe, releases the writer passed to the getObject.
compressWriter.CloseWithError(perr)
}()
writer = compressWriter
} else {
writer = zipWriter
}
if objectAPI.IsEncryptionSupported() && crypto.S3.IsEncrypted(info.UserDefined) {
// Response writer should be limited early on for decryption upto required length,
// additionally also skipping mod(offset)64KiB boundaries.
writer = ioutil.LimitedWriter(writer, startOffset%(64*1024), length)
writer, startOffset, length, err = DecryptBlocksRequest(writer, r, args.BucketName, objectName, startOffset, length, info, false)
if err != nil {
writeWebErrorResponse(w, err)
return err
}
}
httpWriter := ioutil.WriteOnClose(writer)
if err = getObject(ctx, args.BucketName, objectName, 0, length, httpWriter, "", opts); err != nil {
httpWriter.Close()
if info.IsCompressed() {
// Wait for decompression go-routine to retire.
wg.Wait()
}
return err
}
if err = httpWriter.Close(); err != nil {
if !httpWriter.HasWritten() { // write error response only if no data has been written to client yet
writeWebErrorResponse(w, err)
return err
}
}
if info.IsCompressed() {
// Wait for decompression go-routine to retire.
wg.Wait()
}
// Notify object accessed via a GET request.
sendEvent(eventArgs{
EventName: event.ObjectAccessedGet,
BucketName: args.BucketName,
Object: info,
ReqParams: extractReqParams(r),
RespElements: extractRespElements(w),
UserAgent: r.UserAgent(),
Host: host,
Port: port,
})
return nil
}
if !hasSuffix(object, slashSeparator) {
// If not a directory, compress the file and write it to response.
err := zipit(pathJoin(args.Prefix, object))
if err != nil {
return
}
continue
}
// For directories, list the contents recursively and write the objects as compressed
// date to the response writer.
marker := ""
for {
lo, err := listObjects(context.Background(), args.BucketName, pathJoin(args.Prefix, object), marker, "", 1000)
if err != nil {
return
}
marker = lo.NextMarker
for _, obj := range lo.Objects {
err = zipit(obj.Name)
if err != nil {
return
}
}
if !lo.IsTruncated {
break
}
}
}
}
// GetBucketPolicyArgs - get bucket policy args.
type GetBucketPolicyArgs struct {
BucketName string `json:"bucketName"`
Prefix string `json:"prefix"`
}
// GetBucketPolicyRep - get bucket policy reply.
type GetBucketPolicyRep struct {
UIVersion string `json:"uiVersion"`
Policy miniogopolicy.BucketPolicy `json:"policy"`
}
// GetBucketPolicy - get bucket policy for the requested prefix.
func (web *webAPIHandlers) GetBucketPolicy(r *http.Request, args *GetBucketPolicyArgs, reply *GetBucketPolicyRep) error {
objectAPI := web.ObjectAPI()
if objectAPI == nil {
return toJSONError(errServerNotInitialized)
}
_, owner, authErr := webRequestAuthenticate(r)
if authErr != nil {
return toJSONError(authErr)
}
if !owner {
return toJSONError(errAccessDenied)
}
var policyInfo = &miniogopolicy.BucketAccessPolicy{Version: "2012-10-17"}
if isRemoteCallRequired(context.Background(), args.BucketName, objectAPI) {
sr, err := globalDNSConfig.Get(args.BucketName)
if err != nil {
if err == dns.ErrNoEntriesFound {
return toJSONError(BucketNotFound{
Bucket: args.BucketName,
}, args.BucketName)
}
return toJSONError(err, args.BucketName)
}
client, rerr := getRemoteInstanceClient(r, getHostFromSrv(sr))
if rerr != nil {
return toJSONError(rerr, args.BucketName)
}
policyStr, err := client.GetBucketPolicy(args.BucketName)
if err != nil {
return toJSONError(rerr, args.BucketName)
}
bucketPolicy, err := policy.ParseConfig(strings.NewReader(policyStr), args.BucketName)
if err != nil {
return toJSONError(rerr, args.BucketName)
}
policyInfo, err = PolicyToBucketAccessPolicy(bucketPolicy)
if err != nil {
// This should not happen.
return toJSONError(err, args.BucketName)
}
} else {
bucketPolicy, err := objectAPI.GetBucketPolicy(context.Background(), args.BucketName)
if err != nil {
if _, ok := err.(BucketPolicyNotFound); !ok {
return toJSONError(err, args.BucketName)
}
return err
}
policyInfo, err = PolicyToBucketAccessPolicy(bucketPolicy)
if err != nil {
// This should not happen.
return toJSONError(err, args.BucketName)
}
}
reply.UIVersion = browser.UIVersion
reply.Policy = miniogopolicy.GetPolicy(policyInfo.Statements, args.BucketName, args.Prefix)
return nil
}
// ListAllBucketPoliciesArgs - get all bucket policies.
type ListAllBucketPoliciesArgs struct {
BucketName string `json:"bucketName"`
}
// BucketAccessPolicy - Collection of canned bucket policy at a given prefix.
type BucketAccessPolicy struct {
Bucket string `json:"bucket"`
Prefix string `json:"prefix"`
Policy miniogopolicy.BucketPolicy `json:"policy"`
}
// ListAllBucketPoliciesRep - get all bucket policy reply.
type ListAllBucketPoliciesRep struct {
UIVersion string `json:"uiVersion"`
Policies []BucketAccessPolicy `json:"policies"`
}
// ListAllBucketPolicies - get all bucket policy.
func (web *webAPIHandlers) ListAllBucketPolicies(r *http.Request, args *ListAllBucketPoliciesArgs, reply *ListAllBucketPoliciesRep) error {
objectAPI := web.ObjectAPI()
if objectAPI == nil {
return toJSONError(errServerNotInitialized)
}
_, owner, authErr := webRequestAuthenticate(r)
if authErr != nil {
return toJSONError(authErr)
}
if !owner {
return toJSONError(errAccessDenied)
}
var policyInfo = new(miniogopolicy.BucketAccessPolicy)
if isRemoteCallRequired(context.Background(), args.BucketName, objectAPI) {
sr, err := globalDNSConfig.Get(args.BucketName)
if err != nil {
if err == dns.ErrNoEntriesFound {
return toJSONError(BucketNotFound{
Bucket: args.BucketName,
}, args.BucketName)
}
return toJSONError(err, args.BucketName)
}
core, rerr := getRemoteInstanceClient(r, getHostFromSrv(sr))
if rerr != nil {
return toJSONError(rerr, args.BucketName)
}
var policyStr string
policyStr, err = core.Client.GetBucketPolicy(args.BucketName)
if err != nil {
return toJSONError(err, args.BucketName)
}
if policyStr != "" {
if err = json.Unmarshal([]byte(policyStr), policyInfo); err != nil {
return toJSONError(err, args.BucketName)
}
}
} else {
bucketPolicy, err := objectAPI.GetBucketPolicy(context.Background(), args.BucketName)
if err != nil {
if _, ok := err.(BucketPolicyNotFound); !ok {
return toJSONError(err, args.BucketName)
}
}
policyInfo, err = PolicyToBucketAccessPolicy(bucketPolicy)
if err != nil {
return toJSONError(err, args.BucketName)
}
}
reply.UIVersion = browser.UIVersion
for prefix, policy := range miniogopolicy.GetPolicies(policyInfo.Statements, args.BucketName, "") {
bucketName, objectPrefix := urlPath2BucketObjectName(prefix)
objectPrefix = strings.TrimSuffix(objectPrefix, "*")
reply.Policies = append(reply.Policies, BucketAccessPolicy{
Bucket: bucketName,
Prefix: objectPrefix,
Policy: policy,
})
}
return nil
}
// SetBucketPolicyWebArgs - set bucket policy args.
type SetBucketPolicyWebArgs struct {
BucketName string `json:"bucketName"`
Prefix string `json:"prefix"`
Policy string `json:"policy"`
}
// SetBucketPolicy - set bucket policy.
func (web *webAPIHandlers) SetBucketPolicy(r *http.Request, args *SetBucketPolicyWebArgs, reply *WebGenericRep) error {
objectAPI := web.ObjectAPI()
reply.UIVersion = browser.UIVersion
if objectAPI == nil {
return toJSONError(errServerNotInitialized)
}
_, owner, authErr := webRequestAuthenticate(r)
if authErr != nil {
return toJSONError(authErr)
}
if !owner {
return toJSONError(errAccessDenied)
}
policyType := miniogopolicy.BucketPolicy(args.Policy)
if !policyType.IsValidBucketPolicy() {
return &json2.Error{
Message: "Invalid policy type " + args.Policy,
}
}
ctx := context.Background()
if isRemoteCallRequired(context.Background(), args.BucketName, objectAPI) {
sr, err := globalDNSConfig.Get(args.BucketName)
if err != nil {
if err == dns.ErrNoEntriesFound {
return toJSONError(BucketNotFound{
Bucket: args.BucketName,
}, args.BucketName)
}
return toJSONError(err, args.BucketName)
}
core, rerr := getRemoteInstanceClient(r, getHostFromSrv(sr))
if rerr != nil {
return toJSONError(rerr, args.BucketName)
}
var policyStr string
// Use the abstracted API instead of core, such that
// NoSuchBucketPolicy errors are automatically handled.
policyStr, err = core.Client.GetBucketPolicy(args.BucketName)
if err != nil {
return toJSONError(err, args.BucketName)
}
var policyInfo = &miniogopolicy.BucketAccessPolicy{Version: "2012-10-17"}
if policyStr != "" {
if err = json.Unmarshal([]byte(policyStr), policyInfo); err != nil {
return toJSONError(err, args.BucketName)
}
}
policyInfo.Statements = miniogopolicy.SetPolicy(policyInfo.Statements, policyType, args.BucketName, args.Prefix)
if len(policyInfo.Statements) == 0 {
if err = core.SetBucketPolicy(args.BucketName, ""); err != nil {
return toJSONError(err, args.BucketName)
}
return nil
}
bucketPolicy, err := BucketAccessPolicyToPolicy(policyInfo)
if err != nil {
// This should not happen.
return toJSONError(err, args.BucketName)
}
policyData, err := json.Marshal(bucketPolicy)
if err != nil {
return toJSONError(err, args.BucketName)
}
if err = core.SetBucketPolicy(args.BucketName, string(policyData)); err != nil {
return toJSONError(err, args.BucketName)
}
} else {
bucketPolicy, err := objectAPI.GetBucketPolicy(ctx, args.BucketName)
if err != nil {
if _, ok := err.(BucketPolicyNotFound); !ok {
return toJSONError(err, args.BucketName)
}
}
policyInfo, err := PolicyToBucketAccessPolicy(bucketPolicy)
if err != nil {
// This should not happen.
return toJSONError(err, args.BucketName)
}
policyInfo.Statements = miniogopolicy.SetPolicy(policyInfo.Statements, policyType, args.BucketName, args.Prefix)
if len(policyInfo.Statements) == 0 {
if err = objectAPI.DeleteBucketPolicy(ctx, args.BucketName); err != nil {
return toJSONError(err, args.BucketName)
}
globalPolicySys.Remove(args.BucketName)
return nil
}
bucketPolicy, err = BucketAccessPolicyToPolicy(policyInfo)
if err != nil {
// This should not happen.
return toJSONError(err, args.BucketName)
}
// Parse validate and save bucket policy.
if err := objectAPI.SetBucketPolicy(ctx, args.BucketName, bucketPolicy); err != nil {
return toJSONError(err, args.BucketName)
}
globalPolicySys.Set(args.BucketName, *bucketPolicy)
globalNotificationSys.SetBucketPolicy(ctx, args.BucketName, bucketPolicy)
}
return nil
}
// PresignedGetArgs - presigned-get API args.
type PresignedGetArgs struct {
// Host header required for signed headers.
HostName string `json:"host"`
// Bucket name of the object to be presigned.
BucketName string `json:"bucket"`
// Object name to be presigned.
ObjectName string `json:"object"`
// Expiry in seconds.
Expiry int64 `json:"expiry"`
}
// PresignedGetRep - presigned-get URL reply.
type PresignedGetRep struct {
UIVersion string `json:"uiVersion"`
// Presigned URL of the object.
URL string `json:"url"`
}
// PresignedGET - returns presigned-Get url.
func (web *webAPIHandlers) PresignedGet(r *http.Request, args *PresignedGetArgs, reply *PresignedGetRep) error {
claims, owner, authErr := webRequestAuthenticate(r)
if authErr != nil {
return toJSONError(authErr)
}
var creds auth.Credentials
if !owner {
var ok bool
creds, ok = globalIAMSys.GetUser(claims.Subject)
if !ok {
return toJSONError(errInvalidAccessKeyID)
}
} else {
creds = globalServerConfig.GetCredential()
}
region := globalServerConfig.GetRegion()
if args.BucketName == "" || args.ObjectName == "" {
return &json2.Error{
Message: "Bucket and Object are mandatory arguments.",
}
}
reply.UIVersion = browser.UIVersion
reply.URL = presignedGet(args.HostName, args.BucketName, args.ObjectName, args.Expiry, creds, region)
return nil
}
// Returns presigned url for GET method.
func presignedGet(host, bucket, object string, expiry int64, creds auth.Credentials, region string) string {
accessKey := creds.AccessKey
secretKey := creds.SecretKey
date := UTCNow()
dateStr := date.Format(iso8601Format)
credential := fmt.Sprintf("%s/%s", accessKey, getScope(date, region))
var expiryStr = "604800" // Default set to be expire in 7days.
if expiry < 604800 && expiry > 0 {
expiryStr = strconv.FormatInt(expiry, 10)
}
query := url.Values{}
query.Set("X-Amz-Algorithm", signV4Algorithm)
query.Set("X-Amz-Credential", credential)
query.Set("X-Amz-Date", dateStr)
query.Set("X-Amz-Expires", expiryStr)
query.Set("X-Amz-SignedHeaders", "host")
queryStr := s3utils.QueryEncode(query)
path := "/" + path.Join(bucket, object)
// "host" is the only header required to be signed for Presigned URLs.
extractedSignedHeaders := make(http.Header)
extractedSignedHeaders.Set("host", host)
canonicalRequest := getCanonicalRequest(extractedSignedHeaders, unsignedPayload, queryStr, path, "GET")
stringToSign := getStringToSign(canonicalRequest, date, getScope(date, region))
signingKey := getSigningKey(secretKey, date, region)
signature := getSignature(signingKey, stringToSign)
// Construct the final presigned URL.
return host + s3utils.EncodePath(path) + "?" + queryStr + "&" + "X-Amz-Signature=" + signature
}
// toJSONError converts regular errors into more user friendly
// and consumable error message for the browser UI.
func toJSONError(err error, params ...string) (jerr *json2.Error) {
apiErr := toWebAPIError(err)
jerr = &json2.Error{
Message: apiErr.Description,
}
switch apiErr.Code {
// Reserved bucket name provided.
case "AllAccessDisabled":
if len(params) > 0 {
jerr = &json2.Error{
Message: fmt.Sprintf("All access to this bucket %s has been disabled.", params[0]),
}
}
// Bucket name invalid with custom error message.
case "InvalidBucketName":
if len(params) > 0 {
jerr = &json2.Error{
Message: fmt.Sprintf("Bucket Name %s is invalid. Lowercase letters, period, hyphen, numerals are the only allowed characters and should be minimum 3 characters in length.", params[0]),
}
}
// Bucket not found custom error message.
case "NoSuchBucket":
if len(params) > 0 {
jerr = &json2.Error{
Message: fmt.Sprintf("The specified bucket %s does not exist.", params[0]),
}
}
// Object not found custom error message.
case "NoSuchKey":
if len(params) > 1 {
jerr = &json2.Error{
Message: fmt.Sprintf("The specified key %s does not exist", params[1]),
}
}
// Add more custom error messages here with more context.
}
return jerr
}
// toWebAPIError - convert into error into APIError.
func toWebAPIError(err error) APIError {
if err == errAuthentication {
return APIError{
Code: "AccessDenied",
HTTPStatusCode: http.StatusForbidden,
Description: err.Error(),
}
} else if err == errServerNotInitialized {
return APIError{
Code: "XMinioServerNotInitialized",
HTTPStatusCode: http.StatusServiceUnavailable,
Description: err.Error(),
}
} else if err == auth.ErrInvalidAccessKeyLength {
return APIError{
Code: "AccessDenied",
HTTPStatusCode: http.StatusForbidden,
Description: err.Error(),
}
} else if err == auth.ErrInvalidSecretKeyLength {
return APIError{
Code: "AccessDenied",
HTTPStatusCode: http.StatusForbidden,
Description: err.Error(),
}
} else if err == errInvalidAccessKeyID {
return APIError{
Code: "AccessDenied",
HTTPStatusCode: http.StatusForbidden,
Description: err.Error(),
}
} else if err == errSizeUnspecified {
return APIError{
Code: "InvalidRequest",
HTTPStatusCode: http.StatusBadRequest,
Description: err.Error(),
}
} else if err == errChangeCredNotAllowed {
return APIError{
Code: "MethodNotAllowed",
HTTPStatusCode: http.StatusMethodNotAllowed,
Description: err.Error(),
}
} else if err == errInvalidBucketName {
return APIError{
Code: "InvalidBucketName",
HTTPStatusCode: http.StatusBadRequest,
Description: err.Error(),
}
} else if err == errInvalidArgument {
return APIError{
Code: "InvalidArgument",
HTTPStatusCode: http.StatusBadRequest,
Description: err.Error(),
}
} else if err == errEncryptedObject {
return getAPIError(ErrSSEEncryptedObject)
} else if err == errInvalidEncryptionParameters {
return getAPIError(ErrInvalidEncryptionParameters)
} else if err == errObjectTampered {
return getAPIError(ErrObjectTampered)
} else if err == errMethodNotAllowed {
return getAPIError(ErrMethodNotAllowed)
}
// Convert error type to api error code.
switch err.(type) {
case StorageFull:
return getAPIError(ErrStorageFull)
case BucketNotFound:
return getAPIError(ErrNoSuchBucket)
case BucketExists:
return getAPIError(ErrBucketAlreadyOwnedByYou)
case BucketNameInvalid:
return getAPIError(ErrInvalidBucketName)
case hash.BadDigest:
return getAPIError(ErrBadDigest)
case IncompleteBody:
return getAPIError(ErrIncompleteBody)
case ObjectExistsAsDirectory:
return getAPIError(ErrObjectExistsAsDirectory)
case ObjectNotFound:
return getAPIError(ErrNoSuchKey)
case ObjectNameInvalid:
return getAPIError(ErrNoSuchKey)
case InsufficientWriteQuorum:
return getAPIError(ErrWriteQuorum)
case InsufficientReadQuorum:
return getAPIError(ErrReadQuorum)
case PolicyNesting:
return getAPIError(ErrPolicyNesting)
case NotImplemented:
return APIError{
Code: "NotImplemented",
HTTPStatusCode: http.StatusBadRequest,
Description: "Functionality not implemented",
}
}
// Log unexpected and unhandled errors.
logger.LogIf(context.Background(), err)
return APIError{
Code: "InternalError",
HTTPStatusCode: http.StatusInternalServerError,
Description: err.Error(),
}
}
// writeWebErrorResponse - set HTTP status code and write error description to the body.
func writeWebErrorResponse(w http.ResponseWriter, err error) {
apiErr := toWebAPIError(err)
w.WriteHeader(apiErr.HTTPStatusCode)
w.Write([]byte(apiErr.Description))
}