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// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package cmd
import (
"context"
"crypto/subtle"
"encoding/json"
"errors"
"fmt"
"io"
"net/http"
"net/url"
"os"
"path"
"reflect"
"runtime"
"strconv"
"strings"
"time"
"github.com/gorilla/mux"
"github.com/klauspost/compress/zip"
"github.com/minio/minio-go/v7"
miniogo "github.com/minio/minio-go/v7"
miniogopolicy "github.com/minio/minio-go/v7/pkg/policy"
"github.com/minio/minio-go/v7/pkg/s3utils"
"github.com/minio/minio/cmd/config/dns"
"github.com/minio/minio/cmd/config/identity/openid"
"github.com/minio/minio/cmd/crypto"
xhttp "github.com/minio/minio/cmd/http"
"github.com/minio/minio/cmd/logger"
"github.com/minio/minio/pkg/auth"
objectlock "github.com/minio/minio/pkg/bucket/object/lock"
"github.com/minio/minio/pkg/bucket/replication"
"github.com/minio/minio/pkg/etag"
"github.com/minio/minio/pkg/event"
"github.com/minio/minio/pkg/handlers"
"github.com/minio/minio/pkg/hash"
"github.com/minio/minio/pkg/ioutil"
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"github.com/minio/pkg/bucket/policy"
iampolicy "github.com/minio/pkg/iam/policy"
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"github.com/minio/rpc/json2"
)
func extractBucketObject ( args reflect . Value ) ( bucketName , objectName string ) {
switch args . Kind ( ) {
case reflect . Ptr :
a := args . Elem ( )
for i := 0 ; i < a . NumField ( ) ; i ++ {
switch a . Type ( ) . Field ( i ) . Name {
case "BucketName" :
bucketName = a . Field ( i ) . String ( )
case "Prefix" :
objectName = a . Field ( i ) . String ( )
case "ObjectName" :
objectName = a . Field ( i ) . String ( )
}
}
}
return bucketName , objectName
}
// WebGenericArgs - empty struct for calls that don't accept arguments
// for ex. ServerInfo
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 { }
MinioUserInfo map [ string ] interface { }
UIVersion string ` json:"uiVersion" `
}
// ServerInfo - get server info.
func ( web * webAPIHandlers ) ServerInfo ( r * http . Request , args * WebGenericArgs , reply * ServerInfoRep ) error {
ctx := newWebContext ( r , args , "WebServerInfo" )
claims , owner , authErr := webRequestAuthenticate ( r )
if authErr != nil {
return toJSONError ( ctx , authErr )
}
host , err := os . Hostname ( )
if err != nil {
host = ""
}
platform := fmt . Sprintf ( "Host: %s | OS: %s | Arch: %s" ,
host ,
runtime . GOOS ,
runtime . GOARCH )
goruntime := fmt . Sprintf ( "Version: %s | CPUs: %d" , runtime . Version ( ) , runtime . NumCPU ( ) )
reply . MinioVersion = Version
reply . MinioGlobalInfo = getGlobalInfo ( )
// Check if the user is IAM user.
reply . MinioUserInfo = map [ string ] interface { } {
"isIAMUser" : ! owner ,
}
if ! owner {
creds , ok := globalIAMSys . GetUser ( claims . AccessKey )
if ok && creds . SessionToken != "" {
reply . MinioUserInfo [ "isTempUser" ] = true
}
}
reply . MinioPlatform = platform
reply . MinioRuntime = goruntime
reply . UIVersion = Version
return nil
}
// StorageInfoRep - contains storage usage statistics.
type StorageInfoRep struct {
Used uint64 ` json:"used" `
UIVersion string ` json:"uiVersion" `
}
// StorageInfo - web call to gather storage usage statistics.
func ( web * webAPIHandlers ) StorageInfo ( r * http . Request , args * WebGenericArgs , reply * StorageInfoRep ) error {
ctx := newWebContext ( r , args , "WebStorageInfo" )
objectAPI := web . ObjectAPI ( )
if objectAPI == nil {
return toJSONError ( ctx , errServerNotInitialized )
}
_ , _ , authErr := webRequestAuthenticate ( r )
if authErr != nil {
return toJSONError ( ctx , authErr )
}
dataUsageInfo , _ := loadDataUsageFromBackend ( ctx , objectAPI )
reply . Used = dataUsageInfo . ObjectsTotalSize
reply . UIVersion = Version
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 {
ctx := newWebContext ( r , args , "WebMakeBucket" )
objectAPI := web . ObjectAPI ( )
if objectAPI == nil {
return toJSONError ( ctx , errServerNotInitialized )
}
claims , owner , authErr := webRequestAuthenticate ( r )
if authErr != nil {
return toJSONError ( ctx , authErr )
}
// For authenticated users apply IAM policy.
if ! globalIAMSys . IsAllowed ( iampolicy . Args {
AccountName : claims . AccessKey ,
Action : iampolicy . CreateBucketAction ,
BucketName : args . BucketName ,
ConditionValues : getConditionValues ( r , "" , claims . AccessKey , claims . Map ( ) ) ,
IsOwner : owner ,
Claims : claims . Map ( ) ,
} ) {
return toJSONError ( ctx , errAccessDenied )
}
// Check if bucket is a reserved bucket name or invalid.
if isReservedOrInvalidBucket ( args . BucketName , true ) {
return toJSONError ( ctx , errInvalidBucketName , args . BucketName )
}
opts := BucketOptions {
Location : globalServerRegion ,
LockEnabled : false ,
}
if globalDNSConfig != nil {
if _ , err := globalDNSConfig . Get ( args . BucketName ) ; err != nil {
if err == dns . ErrNoEntriesFound || err == dns . ErrNotImplemented {
// Proceed to creating a bucket.
if err = objectAPI . MakeBucketWithLocation ( ctx , args . BucketName , opts ) ; err != nil {
return toJSONError ( ctx , err )
}
if err = globalDNSConfig . Put ( args . BucketName ) ; err != nil {
objectAPI . DeleteBucket ( ctx , args . BucketName , false )
return toJSONError ( ctx , err )
}
reply . UIVersion = Version
return nil
}
return toJSONError ( ctx , err )
}
return toJSONError ( ctx , errBucketAlreadyExists )
}
if err := objectAPI . MakeBucketWithLocation ( ctx , args . BucketName , opts ) ; err != nil {
return toJSONError ( ctx , err , args . BucketName )
}
reply . UIVersion = Version
reqParams := extractReqParams ( r )
reqParams [ "accessKey" ] = claims . GetAccessKey ( )
sendEvent ( eventArgs {
EventName : event . BucketCreated ,
BucketName : args . BucketName ,
ReqParams : reqParams ,
UserAgent : r . UserAgent ( ) ,
Host : handlers . GetSourceIP ( r ) ,
} )
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 {
ctx := newWebContext ( r , args , "WebDeleteBucket" )
objectAPI := web . ObjectAPI ( )
if objectAPI == nil {
return toJSONError ( ctx , errServerNotInitialized )
}
claims , owner , authErr := webRequestAuthenticate ( r )
if authErr != nil {
return toJSONError ( ctx , authErr )
}
// For authenticated users apply IAM policy.
if ! globalIAMSys . IsAllowed ( iampolicy . Args {
AccountName : claims . AccessKey ,
Action : iampolicy . DeleteBucketAction ,
BucketName : args . BucketName ,
ConditionValues : getConditionValues ( r , "" , claims . AccessKey , claims . Map ( ) ) ,
IsOwner : owner ,
Claims : claims . Map ( ) ,
} ) {
return toJSONError ( ctx , errAccessDenied )
}
// Check if bucket is a reserved bucket name or invalid.
if isReservedOrInvalidBucket ( args . BucketName , false ) {
return toJSONError ( ctx , errInvalidBucketName , args . BucketName )
}
reply . UIVersion = Version
if isRemoteCallRequired ( ctx , args . BucketName , objectAPI ) {
sr , err := globalDNSConfig . Get ( args . BucketName )
if err != nil {
if err == dns . ErrNoEntriesFound {
return toJSONError ( ctx , BucketNotFound {
Bucket : args . BucketName ,
} , args . BucketName )
}
return toJSONError ( ctx , err , args . BucketName )
}
core , err := getRemoteInstanceClient ( r , getHostFromSrv ( sr ) )
if err != nil {
return toJSONError ( ctx , err , args . BucketName )
}
if err = core . RemoveBucket ( ctx , args . BucketName ) ; err != nil {
return toJSONError ( ctx , err , args . BucketName )
}
return nil
}
deleteBucket := objectAPI . DeleteBucket
if err := deleteBucket ( ctx , args . BucketName , false ) ; err != nil {
return toJSONError ( ctx , err , args . BucketName )
}
globalNotificationSys . DeleteBucketMetadata ( ctx , args . BucketName )
if globalDNSConfig != nil {
if err := globalDNSConfig . Delete ( args . BucketName ) ; err != nil {
logger . LogIf ( ctx , fmt . Errorf ( "Unable to delete bucket DNS entry %w, please delete it manually" , err ) )
return toJSONError ( ctx , err )
}
}
reqParams := extractReqParams ( r )
reqParams [ "accessKey" ] = claims . AccessKey
sendEvent ( eventArgs {
EventName : event . BucketRemoved ,
BucketName : args . BucketName ,
ReqParams : reqParams ,
UserAgent : r . UserAgent ( ) ,
Host : handlers . GetSourceIP ( r ) ,
} )
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 {
ctx := newWebContext ( r , args , "WebListBuckets" )
objectAPI := web . ObjectAPI ( )
if objectAPI == nil {
return toJSONError ( ctx , errServerNotInitialized )
}
listBuckets := objectAPI . ListBuckets
claims , owner , authErr := webRequestAuthenticate ( r )
if authErr != nil {
return toJSONError ( ctx , 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 && globalBucketFederation {
dnsBuckets , err := globalDNSConfig . List ( )
if err != nil && ! IsErrIgnored ( err ,
dns . ErrNoEntriesFound ,
dns . ErrDomainMissing ) {
return toJSONError ( ctx , err )
}
for _ , dnsRecords := range dnsBuckets {
if globalIAMSys . IsAllowed ( iampolicy . Args {
AccountName : claims . AccessKey ,
Action : iampolicy . ListBucketAction ,
BucketName : dnsRecords [ 0 ] . Key ,
ConditionValues : getConditionValues ( r , "" , claims . AccessKey , claims . Map ( ) ) ,
IsOwner : owner ,
ObjectName : "" ,
Claims : claims . Map ( ) ,
} ) {
reply . Buckets = append ( reply . Buckets , WebBucketInfo {
Name : dnsRecords [ 0 ] . Key ,
CreationDate : dnsRecords [ 0 ] . CreationDate ,
} )
}
}
} else {
buckets , err := listBuckets ( ctx )
if err != nil {
return toJSONError ( ctx , err )
}
for _ , bucket := range buckets {
if globalIAMSys . IsAllowed ( iampolicy . Args {
AccountName : claims . AccessKey ,
Action : iampolicy . ListBucketAction ,
BucketName : bucket . Name ,
ConditionValues : getConditionValues ( r , "" , claims . AccessKey , claims . Map ( ) ) ,
IsOwner : owner ,
ObjectName : "" ,
Claims : claims . Map ( ) ,
} ) {
reply . Buckets = append ( reply . Buckets , WebBucketInfo {
Name : bucket . Name ,
CreationDate : bucket . Created ,
} )
}
}
}
reply . UIVersion = Version
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" `
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 {
ctx := newWebContext ( r , args , "WebListObjects" )
reply . UIVersion = Version
objectAPI := web . ObjectAPI ( )
if objectAPI == nil {
return toJSONError ( ctx , errServerNotInitialized )
}
listObjects := objectAPI . ListObjects
if isRemoteCallRequired ( ctx , args . BucketName , objectAPI ) {
sr , err := globalDNSConfig . Get ( args . BucketName )
if err != nil {
if err == dns . ErrNoEntriesFound {
return toJSONError ( ctx , BucketNotFound {
Bucket : args . BucketName ,
} , args . BucketName )
}
return toJSONError ( ctx , err , args . BucketName )
}
core , err := getRemoteInstanceClient ( r , getHostFromSrv ( sr ) )
if err != nil {
return toJSONError ( ctx , err , args . BucketName )
}
nextMarker := ""
// Fetch all the objects
for {
// Let listObjects reply back the maximum from server implementation
result , err := core . ListObjects ( args . BucketName , args . Prefix , nextMarker , SlashSeparator , 1000 )
if err != nil {
return toJSONError ( ctx , err , args . BucketName )
}
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 ,
} )
}
nextMarker = result . NextMarker
// Return when there are no more objects
if ! result . IsTruncated {
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 , "" , "" , nil ) ,
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 , "" , "" , nil ) ,
IsOwner : false ,
ObjectName : args . Prefix + SlashSeparator ,
} )
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 ( ctx , 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 . AccessKey ,
Action : iampolicy . ListBucketAction ,
BucketName : args . BucketName ,
ConditionValues : getConditionValues ( r , "" , claims . AccessKey , claims . Map ( ) ) ,
IsOwner : owner ,
Claims : claims . Map ( ) ,
} )
writable := globalIAMSys . IsAllowed ( iampolicy . Args {
AccountName : claims . AccessKey ,
Action : iampolicy . PutObjectAction ,
BucketName : args . BucketName ,
ConditionValues : getConditionValues ( r , "" , claims . AccessKey , claims . Map ( ) ) ,
IsOwner : owner ,
ObjectName : args . Prefix + SlashSeparator ,
Claims : claims . Map ( ) ,
} )
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
}
}
// Check if bucket is a reserved bucket name or invalid.
if isReservedOrInvalidBucket ( args . BucketName , false ) {
return toJSONError ( ctx , errInvalidBucketName , args . BucketName )
}
nextMarker := ""
// Fetch all the objects
for {
// Limit browser to '1000' batches to be more responsive, scrolling friendly.
// Also don't change the maxKeys value silly GCS SDKs do not honor maxKeys
// values to be '-1'
lo , err := listObjects ( ctx , args . BucketName , args . Prefix , nextMarker , SlashSeparator , 1000 )
if err != nil {
return & json2 . Error { Message : err . Error ( ) }
}
nextMarker = lo . NextMarker
for i := range lo . Objects {
lo . Objects [ i ] . Size , err = lo . Objects [ i ] . GetActualSize ( )
if err != nil {
return toJSONError ( ctx , err )
}
}
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 when there are no more objects
if ! lo . IsTruncated {
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 {
ctx := newWebContext ( r , args , "WebRemoveObject" )
objectAPI := web . ObjectAPI ( )
if objectAPI == nil {
return toJSONError ( ctx , errServerNotInitialized )
}
deleteObjects := objectAPI . DeleteObjects
if web . CacheAPI ( ) != nil {
deleteObjects = web . CacheAPI ( ) . DeleteObjects
}
getObjectInfoFn := objectAPI . GetObjectInfo
if web . CacheAPI ( ) != nil {
getObjectInfoFn = web . CacheAPI ( ) . GetObjectInfo
}
claims , owner , authErr := webRequestAuthenticate ( r )
if authErr != nil {
if authErr == errNoAuthToken {
// Check if all objects are allowed to be deleted anonymously
for _ , object := range args . Objects {
if ! globalPolicySys . IsAllowed ( policy . Args {
Action : policy . DeleteObjectAction ,
BucketName : args . BucketName ,
ConditionValues : getConditionValues ( r , "" , "" , nil ) ,
IsOwner : false ,
ObjectName : object ,
} ) {
return toJSONError ( ctx , errAuthentication )
}
}
} else {
return toJSONError ( ctx , authErr )
}
}
if args . BucketName == "" || len ( args . Objects ) == 0 {
return toJSONError ( ctx , errInvalidArgument )
}
// Check if bucket is a reserved bucket name or invalid.
if isReservedOrInvalidBucket ( args . BucketName , false ) {
return toJSONError ( ctx , errInvalidBucketName , args . BucketName )
}
reply . UIVersion = Version
if isRemoteCallRequired ( ctx , args . BucketName , objectAPI ) {
sr , err := globalDNSConfig . Get ( args . BucketName )
if err != nil {
if err == dns . ErrNoEntriesFound {
return toJSONError ( ctx , BucketNotFound {
Bucket : args . BucketName ,
} , args . BucketName )
}
return toJSONError ( ctx , err , args . BucketName )
}
core , err := getRemoteInstanceClient ( r , getHostFromSrv ( sr ) )
if err != nil {
return toJSONError ( ctx , err , args . BucketName )
}
objectsCh := make ( chan miniogo . ObjectInfo )
// Send object names that are needed to be removed to objectsCh
go func ( ) {
defer close ( objectsCh )
for _ , objectName := range args . Objects {
objectsCh <- miniogo . ObjectInfo {
Key : objectName ,
}
}
} ( )
for resp := range core . RemoveObjects ( ctx , args . BucketName , objectsCh , minio . RemoveObjectsOptions { } ) {
if resp . Err != nil {
return toJSONError ( ctx , resp . Err , args . BucketName , resp . ObjectName )
}
}
return nil
}
opts := ObjectOptions {
Versioned : globalBucketVersioningSys . Enabled ( args . BucketName ) ,
VersionSuspended : globalBucketVersioningSys . Suspended ( args . BucketName ) ,
}
var (
err error
replicateSync bool
)
reqParams := extractReqParams ( r )
reqParams [ "accessKey" ] = claims . GetAccessKey ( )
sourceIP := handlers . GetSourceIP ( r )
next :
for _ , objectName := range args . Objects {
// If not a directory, remove the object.
if ! HasSuffix ( objectName , SlashSeparator ) && objectName != "" {
// Check permissions for non-anonymous user.
if authErr != errNoAuthToken {
if ! globalIAMSys . IsAllowed ( iampolicy . Args {
AccountName : claims . AccessKey ,
Action : iampolicy . DeleteObjectAction ,
BucketName : args . BucketName ,
ConditionValues : getConditionValues ( r , "" , claims . AccessKey , claims . Map ( ) ) ,
IsOwner : owner ,
ObjectName : objectName ,
Claims : claims . Map ( ) ,
} ) {
return toJSONError ( ctx , errAccessDenied )
}
}
if authErr == errNoAuthToken {
// Check if object is allowed to be deleted anonymously.
if ! globalPolicySys . IsAllowed ( policy . Args {
Action : policy . DeleteObjectAction ,
BucketName : args . BucketName ,
ConditionValues : getConditionValues ( r , "" , "" , nil ) ,
IsOwner : false ,
ObjectName : objectName ,
} ) {
return toJSONError ( ctx , errAccessDenied )
}
}
var (
replicateDel , hasLifecycleConfig bool
goi ObjectInfo
gerr error
)
if _ , err := globalBucketMetadataSys . GetLifecycleConfig ( args . BucketName ) ; err == nil {
hasLifecycleConfig = true
}
os := newObjSweeper ( args . BucketName , objectName )
opts = os . GetOpts ( )
if hasReplicationRules ( ctx , args . BucketName , [ ] ObjectToDelete { { ObjectName : objectName } } ) || hasLifecycleConfig {
goi , gerr = getObjectInfoFn ( ctx , args . BucketName , objectName , opts )
if gerr == nil {
os . SetTransitionState ( goi )
}
if replicateDel , replicateSync = checkReplicateDelete ( ctx , args . BucketName , ObjectToDelete {
ObjectName : objectName ,
VersionID : goi . VersionID ,
} , goi , gerr ) ; replicateDel {
opts . DeleteMarkerReplicationStatus = string ( replication . Pending )
opts . DeleteMarker = true
}
}
deleteObject := objectAPI . DeleteObject
if web . CacheAPI ( ) != nil {
deleteObject = web . CacheAPI ( ) . DeleteObject
}
oi , err := deleteObject ( ctx , args . BucketName , objectName , opts )
if err != nil {
switch err . ( type ) {
case BucketNotFound :
return toJSONError ( ctx , err )
}
}
if oi . Name == "" {
logger . LogIf ( ctx , err )
continue
}
eventName := event . ObjectRemovedDelete
if oi . DeleteMarker {
eventName = event . ObjectRemovedDeleteMarkerCreated
}
// Notify object deleted event.
sendEvent ( eventArgs {
EventName : eventName ,
BucketName : args . BucketName ,
Object : oi ,
ReqParams : reqParams ,
UserAgent : r . UserAgent ( ) ,
Host : sourceIP ,
} )
if replicateDel {
dobj := DeletedObjectVersionInfo {
DeletedObject : DeletedObject {
ObjectName : objectName ,
DeleteMarkerVersionID : oi . VersionID ,
DeleteMarkerReplicationStatus : string ( oi . ReplicationStatus ) ,
DeleteMarkerMTime : DeleteMarkerMTime { oi . ModTime } ,
DeleteMarker : oi . DeleteMarker ,
VersionPurgeStatus : oi . VersionPurgeStatus ,
} ,
Bucket : args . BucketName ,
}
scheduleReplicationDelete ( ctx , dobj , objectAPI , replicateSync )
}
logger . LogIf ( ctx , err )
logger . LogIf ( ctx , os . Sweep ( ) )
continue
}
if authErr == errNoAuthToken {
// Check if object is allowed to be deleted anonymously
if ! globalPolicySys . IsAllowed ( policy . Args {
Action : iampolicy . DeleteObjectAction ,
BucketName : args . BucketName ,
ConditionValues : getConditionValues ( r , "" , "" , nil ) ,
IsOwner : false ,
ObjectName : objectName ,
} ) {
return toJSONError ( ctx , errAccessDenied )
}
} else {
if ! globalIAMSys . IsAllowed ( iampolicy . Args {
AccountName : claims . AccessKey ,
Action : iampolicy . DeleteObjectAction ,
BucketName : args . BucketName ,
ConditionValues : getConditionValues ( r , "" , claims . AccessKey , claims . Map ( ) ) ,
IsOwner : owner ,
ObjectName : objectName ,
Claims : claims . Map ( ) ,
} ) {
return toJSONError ( ctx , errAccessDenied )
}
}
// Allocate new results channel to receive ObjectInfo.
objInfoCh := make ( chan ObjectInfo )
// Walk through all objects
if err = objectAPI . Walk ( ctx , args . BucketName , objectName , objInfoCh , ObjectOptions { } ) ; err != nil {
break next
}
for {
var objects [ ] ObjectToDelete
for obj := range objInfoCh {
if len ( objects ) == maxDeleteList {
// Reached maximum delete requests, attempt a delete for now.
break
}
if obj . ReplicationStatus == replication . Replica {
if authErr == errNoAuthToken {
// Check if object is allowed to be deleted anonymously
if ! globalPolicySys . IsAllowed ( policy . Args {
Action : iampolicy . ReplicateDeleteAction ,
BucketName : args . BucketName ,
ConditionValues : getConditionValues ( r , "" , "" , nil ) ,
IsOwner : false ,
ObjectName : objectName ,
} ) {
return toJSONError ( ctx , errAccessDenied )
}
} else {
if ! globalIAMSys . IsAllowed ( iampolicy . Args {
AccountName : claims . AccessKey ,
Action : iampolicy . ReplicateDeleteAction ,
BucketName : args . BucketName ,
ConditionValues : getConditionValues ( r , "" , claims . AccessKey , claims . Map ( ) ) ,
IsOwner : owner ,
ObjectName : objectName ,
Claims : claims . Map ( ) ,
} ) {
return toJSONError ( ctx , errAccessDenied )
}
}
}
replicateDel , _ := checkReplicateDelete ( ctx , args . BucketName , ObjectToDelete { ObjectName : obj . Name , VersionID : obj . VersionID } , obj , nil )
// since versioned delete is not available on web browser, yet - this is a simple DeleteMarker replication
objToDel := ObjectToDelete { ObjectName : obj . Name }
if replicateDel {
objToDel . DeleteMarkerReplicationStatus = string ( replication . Pending )
}
objects = append ( objects , objToDel )
}
// Nothing to do.
if len ( objects ) == 0 {
break next
}
// Deletes a list of objects.
deletedObjects , errs := deleteObjects ( ctx , args . BucketName , objects , opts )
for i , err := range errs {
if err != nil && ! isErrObjectNotFound ( err ) {
deletedObjects [ i ] . DeleteMarkerReplicationStatus = objects [ i ] . DeleteMarkerReplicationStatus
deletedObjects [ i ] . VersionPurgeStatus = objects [ i ] . VersionPurgeStatus
}
if err != nil {
logger . LogIf ( ctx , err )
break next
}
}
// Notify deleted event for objects.
for _ , dobj := range deletedObjects {
objInfo := ObjectInfo {
Name : dobj . ObjectName ,
VersionID : dobj . VersionID ,
}
if dobj . DeleteMarker {
objInfo = ObjectInfo {
Name : dobj . ObjectName ,
DeleteMarker : dobj . DeleteMarker ,
VersionID : dobj . DeleteMarkerVersionID ,
}
}
sendEvent ( eventArgs {
EventName : event . ObjectRemovedDelete ,
BucketName : args . BucketName ,
Object : objInfo ,
ReqParams : reqParams ,
UserAgent : r . UserAgent ( ) ,
Host : sourceIP ,
} )
if dobj . DeleteMarkerReplicationStatus == string ( replication . Pending ) || dobj . VersionPurgeStatus == Pending {
dv := DeletedObjectVersionInfo {
DeletedObject : dobj ,
Bucket : args . BucketName ,
}
scheduleReplicationDelete ( ctx , dv , objectAPI , replicateSync )
}
}
}
}
if err != nil && ! isErrObjectNotFound ( err ) && ! isErrVersionNotFound ( err ) {
// Ignore object not found error.
return toJSONError ( ctx , 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 {
ctx := newWebContext ( r , args , "WebLogin" )
token , err := authenticateWeb ( args . Username , args . Password )
if err != nil {
return toJSONError ( ctx , err )
}
reply . Token = token
reply . UIVersion = Version
return nil
}
// SetAuthArgs - argument for SetAuth
type SetAuthArgs struct {
CurrentAccessKey string ` json:"currentAccessKey" `
CurrentSecretKey string ` json:"currentSecretKey" `
NewAccessKey string ` json:"newAccessKey" `
NewSecretKey string ` json:"newSecretKey" `
}
// 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 {
ctx := newWebContext ( r , args , "WebSetAuth" )
claims , owner , authErr := webRequestAuthenticate ( r )
if authErr != nil {
return toJSONError ( ctx , authErr )
}
if owner {
// Owner is not allowed to change credentials through browser.
return toJSONError ( ctx , errChangeCredNotAllowed )
}
if ! globalIAMSys . IsAllowed ( iampolicy . Args {
AccountName : claims . AccessKey ,
Action : iampolicy . CreateUserAdminAction ,
IsOwner : false ,
ConditionValues : getConditionValues ( r , "" , claims . AccessKey , claims . Map ( ) ) ,
Claims : claims . Map ( ) ,
DenyOnly : true ,
} ) {
return toJSONError ( ctx , errChangeCredNotAllowed )
}
// for IAM users, access key cannot be updated
// claims.AccessKey is used instead of accesskey from args
prevCred , ok := globalIAMSys . GetUser ( claims . AccessKey )
if ! ok {
return errInvalidAccessKeyID
}
// Throw error when wrong secret key is provided
if subtle . ConstantTimeCompare ( [ ] byte ( prevCred . SecretKey ) , [ ] byte ( args . CurrentSecretKey ) ) != 1 {
return errIncorrectCreds
}
creds , err := auth . CreateCredentials ( claims . AccessKey , args . NewSecretKey )
if err != nil {
return toJSONError ( ctx , err )
}
err = globalIAMSys . SetUserSecretKey ( creds . AccessKey , creds . SecretKey )
if err != nil {
return toJSONError ( ctx , err )
}
reply . Token , err = authenticateWeb ( creds . AccessKey , creds . SecretKey )
if err != nil {
return toJSONError ( ctx , err )
}
reply . UIVersion = Version
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 {
ctx := newWebContext ( r , args , "WebCreateURLToken" )
claims , owner , authErr := webRequestAuthenticate ( r )
if authErr != nil {
return toJSONError ( ctx , authErr )
}
creds := globalActiveCred
if ! owner {
var ok bool
creds , ok = globalIAMSys . GetUser ( claims . AccessKey )
if ! ok {
return toJSONError ( ctx , errInvalidAccessKeyID )
}
}
if creds . SessionToken != "" {
// Use the same session token for URL token.
reply . Token = creds . SessionToken
} else {
token , err := authenticateURL ( creds . AccessKey , creds . SecretKey )
if err != nil {
return toJSONError ( ctx , err )
}
reply . Token = token
}
reply . UIVersion = Version
return nil
}
// Upload - file upload handler.
func ( web * webAPIHandlers ) Upload ( w http . ResponseWriter , r * http . Request ) {
ctx := newContext ( r , w , "WebUpload" )
// obtain the claims here if possible, for audit logging.
claims , owner , authErr := webRequestAuthenticate ( r )
defer logger . AuditLog ( ctx , w , r , claims . Map ( ) )
objectAPI := web . ObjectAPI ( )
if objectAPI == nil {
writeWebErrorResponse ( w , errServerNotInitialized )
return
}
vars := mux . Vars ( r )
bucket := vars [ "bucket" ]
object , err := unescapePath ( vars [ "object" ] )
if err != nil {
writeWebErrorResponse ( w , err )
return
}
retPerms := ErrAccessDenied
holdPerms := ErrAccessDenied
replPerms := ErrAccessDenied
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 , "" , "" , nil ) ,
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 . AccessKey ,
Action : iampolicy . PutObjectAction ,
BucketName : bucket ,
ConditionValues : getConditionValues ( r , "" , claims . AccessKey , claims . Map ( ) ) ,
IsOwner : owner ,
ObjectName : object ,
Claims : claims . Map ( ) ,
} ) {
writeWebErrorResponse ( w , errAuthentication )
return
}
if globalIAMSys . IsAllowed ( iampolicy . Args {
AccountName : claims . AccessKey ,
Action : iampolicy . PutObjectRetentionAction ,
BucketName : bucket ,
ConditionValues : getConditionValues ( r , "" , claims . AccessKey , claims . Map ( ) ) ,
IsOwner : owner ,
ObjectName : object ,
Claims : claims . Map ( ) ,
} ) {
retPerms = ErrNone
}
if globalIAMSys . IsAllowed ( iampolicy . Args {
AccountName : claims . AccessKey ,
Action : iampolicy . PutObjectLegalHoldAction ,
BucketName : bucket ,
ConditionValues : getConditionValues ( r , "" , claims . AccessKey , claims . Map ( ) ) ,
IsOwner : owner ,
ObjectName : object ,
Claims : claims . Map ( ) ,
} ) {
holdPerms = ErrNone
}
if globalIAMSys . IsAllowed ( iampolicy . Args {
AccountName : claims . AccessKey ,
Action : iampolicy . GetReplicationConfigurationAction ,
BucketName : bucket ,
ConditionValues : getConditionValues ( r , "" , claims . AccessKey , claims . Map ( ) ) ,
IsOwner : owner ,
ObjectName : "" ,
Claims : claims . Map ( ) ,
} ) {
replPerms = ErrNone
}
}
// Check if bucket is a reserved bucket name or invalid.
if isReservedOrInvalidBucket ( bucket , false ) {
writeWebErrorResponse ( w , errInvalidBucketName )
return
}
// Check if bucket encryption is enabled
2021-05-14 03:59:05 -04:00
sseConfig , _ := globalBucketSSEConfigSys . Get ( bucket )
sseConfig . Apply ( r . Header , globalAutoEncryption )
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// Require Content-Length to be set in the request
size := r . ContentLength
if size < 0 {
writeWebErrorResponse ( w , errSizeUnspecified )
return
}
if err := enforceBucketQuota ( ctx , bucket , size ) ; err != nil {
writeWebErrorResponse ( w , err )
return
}
// Extract incoming metadata if any.
metadata , err := extractMetadata ( ctx , r )
if err != nil {
writeErrorResponse ( ctx , w , toAPIError ( ctx , err ) , 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" ] = compressionAlgorithmV2
metadata [ ReservedMetadataPrefix + "actual-size" ] = strconv . FormatInt ( actualSize , 10 )
actualReader , err := hash . NewReader ( reader , actualSize , "" , "" , actualSize )
if err != nil {
writeWebErrorResponse ( w , err )
return
}
// Set compression metrics.
size = - 1 // Since compressed size is un-predictable.
s2c := newS2CompressReader ( actualReader , actualSize )
defer s2c . Close ( )
reader = etag . Wrap ( s2c , actualReader )
hashReader , err = hash . NewReader ( reader , size , "" , "" , actualSize )
if err != nil {
writeWebErrorResponse ( w , err )
return
}
}
mustReplicate , sync := mustReplicateWeb ( ctx , r , bucket , object , metadata , "" , replPerms )
if mustReplicate {
metadata [ xhttp . AmzBucketReplicationStatus ] = string ( replication . Pending )
}
pReader = NewPutObjReader ( hashReader )
// get gateway encryption options
opts , err := putOpts ( ctx , r , bucket , object , metadata )
if err != nil {
writeErrorResponseHeadersOnly ( w , toAPIError ( ctx , err ) )
return
}
if objectAPI . IsEncryptionSupported ( ) {
if _ , ok := crypto . IsRequested ( r . Header ) ; ok && ! HasSuffix ( object , SlashSeparator ) { // handle SSE requests
var (
objectEncryptionKey crypto . ObjectKey
encReader io . Reader
)
encReader , objectEncryptionKey , err = EncryptRequest ( hashReader , r , bucket , object , metadata )
if err != nil {
writeErrorResponse ( ctx , w , toAPIError ( ctx , err ) , r . URL , guessIsBrowserReq ( r ) )
return
}
info := ObjectInfo { Size : size }
// do not try to verify encrypted content
hashReader , err = hash . NewReader ( etag . Wrap ( encReader , hashReader ) , info . EncryptedSize ( ) , "" , "" , size )
if err != nil {
writeErrorResponse ( ctx , w , toAPIError ( ctx , err ) , r . URL , guessIsBrowserReq ( r ) )
return
}
pReader , err = pReader . WithEncryption ( hashReader , & objectEncryptionKey )
if err != nil {
writeErrorResponse ( ctx , w , toAPIError ( ctx , err ) , r . URL , guessIsBrowserReq ( r ) )
return
}
}
}
// Ensure that metadata does not contain sensitive information
crypto . RemoveSensitiveEntries ( metadata )
putObject := objectAPI . PutObject
getObjectInfo := objectAPI . GetObjectInfo
if web . CacheAPI ( ) != nil {
putObject = web . CacheAPI ( ) . PutObject
getObjectInfo = web . CacheAPI ( ) . GetObjectInfo
}
// enforce object retention rules
retentionMode , retentionDate , _ , s3Err := checkPutObjectLockAllowed ( ctx , r , bucket , object , getObjectInfo , retPerms , holdPerms )
if s3Err != ErrNone {
writeErrorResponse ( ctx , w , errorCodes . ToAPIErr ( s3Err ) , r . URL , guessIsBrowserReq ( r ) )
return
}
if retentionMode != "" {
opts . UserDefined [ strings . ToLower ( xhttp . AmzObjectLockMode ) ] = string ( retentionMode )
opts . UserDefined [ strings . ToLower ( xhttp . AmzObjectLockRetainUntilDate ) ] = retentionDate . UTC ( ) . Format ( iso8601TimeFormat )
}
os := newObjSweeper ( bucket , object )
// Get appropriate object info to identify the remote object to delete
goiOpts := os . GetOpts ( )
if goi , gerr := getObjectInfo ( ctx , bucket , object , goiOpts ) ; gerr == nil {
os . SetTransitionState ( goi )
}
objInfo , err := putObject ( GlobalContext , bucket , object , pReader , opts )
if err != nil {
writeWebErrorResponse ( w , err )
return
}
if objectAPI . IsEncryptionSupported ( ) {
switch kind , _ := crypto . IsEncrypted ( objInfo . UserDefined ) ; kind {
case crypto . S3 :
w . Header ( ) . Set ( xhttp . AmzServerSideEncryption , xhttp . AmzEncryptionAES )
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case crypto . S3KMS :
w . Header ( ) . Set ( xhttp . AmzServerSideEncryption , xhttp . AmzEncryptionKMS )
if kmsCtx , ok := objInfo . UserDefined [ crypto . MetaContext ] ; ok {
w . Header ( ) . Set ( xhttp . AmzServerSideEncryptionKmsContext , kmsCtx )
}
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case crypto . SSEC :
w . Header ( ) . Set ( xhttp . AmzServerSideEncryptionCustomerAlgorithm , r . Header . Get ( xhttp . AmzServerSideEncryptionCustomerAlgorithm ) )
w . Header ( ) . Set ( xhttp . AmzServerSideEncryptionCustomerKeyMD5 , r . Header . Get ( xhttp . AmzServerSideEncryptionCustomerKeyMD5 ) )
}
}
if mustReplicate {
scheduleReplication ( ctx , objInfo . Clone ( ) , objectAPI , sync , replication . ObjectReplicationType )
}
logger . LogIf ( ctx , os . Sweep ( ) )
reqParams := extractReqParams ( r )
reqParams [ "accessKey" ] = claims . GetAccessKey ( )
// Notify object created event.
sendEvent ( eventArgs {
EventName : event . ObjectCreatedPut ,
BucketName : bucket ,
Object : objInfo ,
ReqParams : reqParams ,
RespElements : extractRespElements ( w ) ,
UserAgent : r . UserAgent ( ) ,
Host : handlers . GetSourceIP ( r ) ,
} )
}
// Download - file download handler.
func ( web * webAPIHandlers ) Download ( w http . ResponseWriter , r * http . Request ) {
ctx := newContext ( r , w , "WebDownload" )
claims , owner , authErr := webTokenAuthenticate ( r . URL . Query ( ) . Get ( "token" ) )
defer logger . AuditLog ( ctx , w , r , claims . Map ( ) )
objectAPI := web . ObjectAPI ( )
if objectAPI == nil {
writeWebErrorResponse ( w , errServerNotInitialized )
return
}
vars := mux . Vars ( r )
bucket := vars [ "bucket" ]
object , err := unescapePath ( vars [ "object" ] )
if err != nil {
writeWebErrorResponse ( w , err )
return
}
getRetPerms := ErrAccessDenied
legalHoldPerms := ErrAccessDenied
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 , "" , "" , nil ) ,
IsOwner : false ,
ObjectName : object ,
} ) {
writeWebErrorResponse ( w , errAuthentication )
return
}
if globalPolicySys . IsAllowed ( policy . Args {
Action : policy . GetObjectRetentionAction ,
BucketName : bucket ,
ConditionValues : getConditionValues ( r , "" , "" , nil ) ,
IsOwner : false ,
ObjectName : object ,
} ) {
getRetPerms = ErrNone
}
if globalPolicySys . IsAllowed ( policy . Args {
Action : policy . GetObjectLegalHoldAction ,
BucketName : bucket ,
ConditionValues : getConditionValues ( r , "" , "" , nil ) ,
IsOwner : false ,
ObjectName : object ,
} ) {
legalHoldPerms = ErrNone
}
} else {
writeWebErrorResponse ( w , authErr )
return
}
}
// For authenticated users apply IAM policy.
if authErr == nil {
if ! globalIAMSys . IsAllowed ( iampolicy . Args {
AccountName : claims . AccessKey ,
Action : iampolicy . GetObjectAction ,
BucketName : bucket ,
ConditionValues : getConditionValues ( r , "" , claims . AccessKey , claims . Map ( ) ) ,
IsOwner : owner ,
ObjectName : object ,
Claims : claims . Map ( ) ,
} ) {
writeWebErrorResponse ( w , errAuthentication )
return
}
if globalIAMSys . IsAllowed ( iampolicy . Args {
AccountName : claims . AccessKey ,
Action : iampolicy . GetObjectRetentionAction ,
BucketName : bucket ,
ConditionValues : getConditionValues ( r , "" , claims . AccessKey , claims . Map ( ) ) ,
IsOwner : owner ,
ObjectName : object ,
Claims : claims . Map ( ) ,
} ) {
getRetPerms = ErrNone
}
if globalIAMSys . IsAllowed ( iampolicy . Args {
AccountName : claims . AccessKey ,
Action : iampolicy . GetObjectLegalHoldAction ,
BucketName : bucket ,
ConditionValues : getConditionValues ( r , "" , claims . AccessKey , claims . Map ( ) ) ,
IsOwner : owner ,
ObjectName : object ,
Claims : claims . Map ( ) ,
} ) {
legalHoldPerms = ErrNone
}
}
// Check if bucket is a reserved bucket name or invalid.
if isReservedOrInvalidBucket ( bucket , false ) {
writeWebErrorResponse ( w , errInvalidBucketName )
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
// filter object lock metadata if permission does not permit
objInfo . UserDefined = objectlock . FilterObjectLockMetadata ( objInfo . UserDefined , getRetPerms != ErrNone , legalHoldPerms != ErrNone )
if objectAPI . IsEncryptionSupported ( ) {
if _ , err = DecryptObjectInfo ( & objInfo , r ) ; err != nil {
writeWebErrorResponse ( w , err )
return
}
}
// Set encryption response headers
if objectAPI . IsEncryptionSupported ( ) {
switch kind , _ := crypto . IsEncrypted ( objInfo . UserDefined ) ; kind {
case crypto . S3 :
w . Header ( ) . Set ( xhttp . AmzServerSideEncryption , xhttp . AmzEncryptionAES )
2021-05-06 18:24:01 -04:00
case crypto . S3KMS :
w . Header ( ) . Set ( xhttp . AmzServerSideEncryption , xhttp . AmzEncryptionKMS )
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w . Header ( ) . Set ( xhttp . AmzServerSideEncryptionKmsID , objInfo . UserDefined [ crypto . MetaKeyID ] )
2021-05-06 18:24:01 -04:00
if kmsCtx , ok := objInfo . UserDefined [ crypto . MetaContext ] ; ok {
w . Header ( ) . Set ( xhttp . AmzServerSideEncryptionKmsContext , kmsCtx )
}
2021-04-29 22:01:43 -04:00
case crypto . SSEC :
w . Header ( ) . Set ( xhttp . AmzServerSideEncryptionCustomerAlgorithm , r . Header . Get ( xhttp . AmzServerSideEncryptionCustomerAlgorithm ) )
w . Header ( ) . Set ( xhttp . AmzServerSideEncryptionCustomerKeyMD5 , r . Header . Get ( xhttp . AmzServerSideEncryptionCustomerKeyMD5 ) )
}
}
// Set Parts Count Header
if opts . PartNumber > 0 && len ( objInfo . Parts ) > 0 {
setPartsCountHeaders ( w , objInfo )
}
if err = setObjectHeaders ( w , objInfo , nil , opts ) ; err != nil {
writeWebErrorResponse ( w , err )
return
}
// Add content disposition.
w . Header ( ) . Set ( xhttp . ContentDisposition , 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
}
}
reqParams := extractReqParams ( r )
reqParams [ "accessKey" ] = claims . GetAccessKey ( )
// Notify object accessed via a GET request.
sendEvent ( eventArgs {
EventName : event . ObjectAccessedGet ,
BucketName : bucket ,
Object : objInfo ,
ReqParams : reqParams ,
RespElements : extractRespElements ( w ) ,
UserAgent : r . UserAgent ( ) ,
Host : handlers . GetSourceIP ( r ) ,
} )
}
// 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 ) {
host := handlers . GetSourceIP ( r )
claims , owner , authErr := webTokenAuthenticate ( r . URL . Query ( ) . Get ( "token" ) )
ctx := newContext ( r , w , "WebDownloadZip" )
defer logger . AuditLog ( ctx , w , r , claims . Map ( ) )
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
}
var getRetPerms [ ] APIErrorCode
var legalHoldPerms [ ] APIErrorCode
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 , "" , "" , nil ) ,
IsOwner : false ,
ObjectName : pathJoin ( args . Prefix , object ) ,
} ) {
writeWebErrorResponse ( w , errAuthentication )
return
}
retentionPerm := ErrAccessDenied
if globalPolicySys . IsAllowed ( policy . Args {
Action : policy . GetObjectRetentionAction ,
BucketName : args . BucketName ,
ConditionValues : getConditionValues ( r , "" , "" , nil ) ,
IsOwner : false ,
ObjectName : pathJoin ( args . Prefix , object ) ,
} ) {
retentionPerm = ErrNone
}
getRetPerms = append ( getRetPerms , retentionPerm )
legalHoldPerm := ErrAccessDenied
if globalPolicySys . IsAllowed ( policy . Args {
Action : policy . GetObjectLegalHoldAction ,
BucketName : args . BucketName ,
ConditionValues : getConditionValues ( r , "" , "" , nil ) ,
IsOwner : false ,
ObjectName : pathJoin ( args . Prefix , object ) ,
} ) {
legalHoldPerm = ErrNone
}
legalHoldPerms = append ( legalHoldPerms , legalHoldPerm )
}
} 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 . AccessKey ,
Action : iampolicy . GetObjectAction ,
BucketName : args . BucketName ,
ConditionValues : getConditionValues ( r , "" , claims . AccessKey , claims . Map ( ) ) ,
IsOwner : owner ,
ObjectName : pathJoin ( args . Prefix , object ) ,
Claims : claims . Map ( ) ,
} ) {
writeWebErrorResponse ( w , errAuthentication )
return
}
retentionPerm := ErrAccessDenied
if globalIAMSys . IsAllowed ( iampolicy . Args {
AccountName : claims . AccessKey ,
Action : iampolicy . GetObjectRetentionAction ,
BucketName : args . BucketName ,
ConditionValues : getConditionValues ( r , "" , claims . AccessKey , claims . Map ( ) ) ,
IsOwner : owner ,
ObjectName : pathJoin ( args . Prefix , object ) ,
Claims : claims . Map ( ) ,
} ) {
retentionPerm = ErrNone
}
getRetPerms = append ( getRetPerms , retentionPerm )
legalHoldPerm := ErrAccessDenied
if globalIAMSys . IsAllowed ( iampolicy . Args {
AccountName : claims . AccessKey ,
Action : iampolicy . GetObjectLegalHoldAction ,
BucketName : args . BucketName ,
ConditionValues : getConditionValues ( r , "" , claims . AccessKey , claims . Map ( ) ) ,
IsOwner : owner ,
ObjectName : pathJoin ( args . Prefix , object ) ,
Claims : claims . Map ( ) ,
} ) {
legalHoldPerm = ErrNone
}
legalHoldPerms = append ( legalHoldPerms , legalHoldPerm )
}
}
// Check if bucket is a reserved bucket name or invalid.
if isReservedOrInvalidBucket ( args . BucketName , false ) {
writeWebErrorResponse ( w , errInvalidBucketName )
return
}
getObjectNInfo := objectAPI . GetObjectNInfo
if web . CacheAPI ( ) != nil {
getObjectNInfo = web . CacheAPI ( ) . GetObjectNInfo
}
archive := zip . NewWriter ( w )
defer archive . Close ( )
reqParams := extractReqParams ( r )
reqParams [ "accessKey" ] = claims . GetAccessKey ( )
respElements := extractRespElements ( w )
for i , object := range args . Objects {
if contextCanceled ( ctx ) {
return
}
// Writes compressed object file to the response.
zipit := func ( objectName string ) error {
var opts ObjectOptions
gr , err := getObjectNInfo ( ctx , args . BucketName , objectName , nil , r . Header , readLock , opts )
if err != nil {
return err
}
defer gr . Close ( )
info := gr . ObjInfo
// filter object lock metadata if permission does not permit
info . UserDefined = objectlock . FilterObjectLockMetadata ( info . UserDefined , getRetPerms [ i ] != ErrNone , legalHoldPerms [ i ] != ErrNone )
// For reporting, set the file size to the uncompressed size.
info . Size , err = info . GetActualSize ( )
if err != nil {
return err
}
header := & zip . FileHeader {
Name : strings . TrimPrefix ( objectName , args . Prefix ) ,
Method : zip . Deflate ,
Flags : 1 << 11 ,
Modified : info . ModTime ,
UncompressedSize64 : uint64 ( info . Size ) ,
}
if info . Size < 20 || hasStringSuffixInSlice ( info . Name , standardExcludeCompressExtensions ) || hasPattern ( standardExcludeCompressContentTypes , info . ContentType ) {
// We strictly disable compression for standard extensions/content-types.
header . Method = zip . Store
}
writer , err := archive . CreateHeader ( header )
if err != nil {
return err
}
// Write object content to response body
if _ , err = io . Copy ( writer , gr ) ; err != nil {
return err
}
// Notify object accessed via a GET request.
sendEvent ( eventArgs {
EventName : event . ObjectAccessedGet ,
BucketName : args . BucketName ,
Object : info ,
ReqParams : reqParams ,
RespElements : respElements ,
UserAgent : r . UserAgent ( ) ,
Host : host ,
} )
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 {
logger . LogIf ( ctx , err )
return
}
continue
}
objInfoCh := make ( chan ObjectInfo )
// Walk through all objects
if err := objectAPI . Walk ( ctx , args . BucketName , pathJoin ( args . Prefix , object ) , objInfoCh , ObjectOptions { } ) ; err != nil {
logger . LogIf ( ctx , err )
continue
}
for obj := range objInfoCh {
if err := zipit ( obj . Name ) ; err != nil {
logger . LogIf ( ctx , err )
continue
}
}
}
}
// 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 {
ctx := newWebContext ( r , args , "WebGetBucketPolicy" )
objectAPI := web . ObjectAPI ( )
if objectAPI == nil {
return toJSONError ( ctx , errServerNotInitialized )
}
claims , owner , authErr := webRequestAuthenticate ( r )
if authErr != nil {
return toJSONError ( ctx , authErr )
}
// For authenticated users apply IAM policy.
if ! globalIAMSys . IsAllowed ( iampolicy . Args {
AccountName : claims . AccessKey ,
Action : iampolicy . GetBucketPolicyAction ,
BucketName : args . BucketName ,
ConditionValues : getConditionValues ( r , "" , claims . AccessKey , claims . Map ( ) ) ,
IsOwner : owner ,
Claims : claims . Map ( ) ,
} ) {
return toJSONError ( ctx , errAccessDenied )
}
// Check if bucket is a reserved bucket name or invalid.
if isReservedOrInvalidBucket ( args . BucketName , false ) {
return toJSONError ( ctx , errInvalidBucketName , args . BucketName )
}
var policyInfo = & miniogopolicy . BucketAccessPolicy { Version : "2012-10-17" }
if isRemoteCallRequired ( ctx , args . BucketName , objectAPI ) {
sr , err := globalDNSConfig . Get ( args . BucketName )
if err != nil {
if err == dns . ErrNoEntriesFound {
return toJSONError ( ctx , BucketNotFound {
Bucket : args . BucketName ,
} , args . BucketName )
}
return toJSONError ( ctx , err , args . BucketName )
}
client , rerr := getRemoteInstanceClient ( r , getHostFromSrv ( sr ) )
if rerr != nil {
return toJSONError ( ctx , rerr , args . BucketName )
}
policyStr , err := client . GetBucketPolicy ( ctx , args . BucketName )
if err != nil {
return toJSONError ( ctx , rerr , args . BucketName )
}
bucketPolicy , err := policy . ParseConfig ( strings . NewReader ( policyStr ) , args . BucketName )
if err != nil {
return toJSONError ( ctx , rerr , args . BucketName )
}
policyInfo , err = PolicyToBucketAccessPolicy ( bucketPolicy )
if err != nil {
// This should not happen.
return toJSONError ( ctx , err , args . BucketName )
}
} else {
bucketPolicy , err := globalPolicySys . Get ( args . BucketName )
if err != nil {
if _ , ok := err . ( BucketPolicyNotFound ) ; ! ok {
return toJSONError ( ctx , err , args . BucketName )
}
}
policyInfo , err = PolicyToBucketAccessPolicy ( bucketPolicy )
if err != nil {
// This should not happen.
return toJSONError ( ctx , err , args . BucketName )
}
}
reply . UIVersion = Version
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 {
ctx := newWebContext ( r , args , "WebListAllBucketPolicies" )
objectAPI := web . ObjectAPI ( )
if objectAPI == nil {
return toJSONError ( ctx , errServerNotInitialized )
}
claims , owner , authErr := webRequestAuthenticate ( r )
if authErr != nil {
return toJSONError ( ctx , authErr )
}
// For authenticated users apply IAM policy.
if ! globalIAMSys . IsAllowed ( iampolicy . Args {
AccountName : claims . AccessKey ,
Action : iampolicy . GetBucketPolicyAction ,
BucketName : args . BucketName ,
ConditionValues : getConditionValues ( r , "" , claims . AccessKey , claims . Map ( ) ) ,
IsOwner : owner ,
Claims : claims . Map ( ) ,
} ) {
return toJSONError ( ctx , errAccessDenied )
}
// Check if bucket is a reserved bucket name or invalid.
if isReservedOrInvalidBucket ( args . BucketName , false ) {
return toJSONError ( ctx , errInvalidBucketName , args . BucketName )
}
var policyInfo = new ( miniogopolicy . BucketAccessPolicy )
if isRemoteCallRequired ( ctx , args . BucketName , objectAPI ) {
sr , err := globalDNSConfig . Get ( args . BucketName )
if err != nil {
if err == dns . ErrNoEntriesFound {
return toJSONError ( ctx , BucketNotFound {
Bucket : args . BucketName ,
} , args . BucketName )
}
return toJSONError ( ctx , err , args . BucketName )
}
core , rerr := getRemoteInstanceClient ( r , getHostFromSrv ( sr ) )
if rerr != nil {
return toJSONError ( ctx , rerr , args . BucketName )
}
var policyStr string
policyStr , err = core . Client . GetBucketPolicy ( ctx , args . BucketName )
if err != nil {
return toJSONError ( ctx , err , args . BucketName )
}
if policyStr != "" {
if err = json . Unmarshal ( [ ] byte ( policyStr ) , policyInfo ) ; err != nil {
return toJSONError ( ctx , err , args . BucketName )
}
}
} else {
bucketPolicy , err := globalPolicySys . Get ( args . BucketName )
if err != nil {
if _ , ok := err . ( BucketPolicyNotFound ) ; ! ok {
return toJSONError ( ctx , err , args . BucketName )
}
}
policyInfo , err = PolicyToBucketAccessPolicy ( bucketPolicy )
if err != nil {
return toJSONError ( ctx , err , args . BucketName )
}
}
reply . UIVersion = Version
for prefix , policy := range miniogopolicy . GetPolicies ( policyInfo . Statements , args . BucketName , "" ) {
bucketName , objectPrefix := path2BucketObject ( 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 {
ctx := newWebContext ( r , args , "WebSetBucketPolicy" )
objectAPI := web . ObjectAPI ( )
reply . UIVersion = Version
if objectAPI == nil {
return toJSONError ( ctx , errServerNotInitialized )
}
claims , owner , authErr := webRequestAuthenticate ( r )
if authErr != nil {
return toJSONError ( ctx , authErr )
}
// For authenticated users apply IAM policy.
if ! globalIAMSys . IsAllowed ( iampolicy . Args {
AccountName : claims . AccessKey ,
Action : iampolicy . PutBucketPolicyAction ,
BucketName : args . BucketName ,
ConditionValues : getConditionValues ( r , "" , claims . AccessKey , claims . Map ( ) ) ,
IsOwner : owner ,
Claims : claims . Map ( ) ,
} ) {
return toJSONError ( ctx , errAccessDenied )
}
// Check if bucket is a reserved bucket name or invalid.
if isReservedOrInvalidBucket ( args . BucketName , false ) {
return toJSONError ( ctx , errInvalidBucketName , args . BucketName )
}
policyType := miniogopolicy . BucketPolicy ( args . Policy )
if ! policyType . IsValidBucketPolicy ( ) {
return & json2 . Error {
Message : "Invalid policy type " + args . Policy ,
}
}
if isRemoteCallRequired ( ctx , args . BucketName , objectAPI ) {
sr , err := globalDNSConfig . Get ( args . BucketName )
if err != nil {
if err == dns . ErrNoEntriesFound {
return toJSONError ( ctx , BucketNotFound {
Bucket : args . BucketName ,
} , args . BucketName )
}
return toJSONError ( ctx , err , args . BucketName )
}
core , rerr := getRemoteInstanceClient ( r , getHostFromSrv ( sr ) )
if rerr != nil {
return toJSONError ( ctx , 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 ( ctx , args . BucketName )
if err != nil {
return toJSONError ( ctx , err , args . BucketName )
}
var policyInfo = & miniogopolicy . BucketAccessPolicy { Version : "2012-10-17" }
if policyStr != "" {
if err = json . Unmarshal ( [ ] byte ( policyStr ) , policyInfo ) ; err != nil {
return toJSONError ( ctx , err , args . BucketName )
}
}
policyInfo . Statements = miniogopolicy . SetPolicy ( policyInfo . Statements , policyType , args . BucketName , args . Prefix )
if len ( policyInfo . Statements ) == 0 {
if err = core . SetBucketPolicy ( ctx , args . BucketName , "" ) ; err != nil {
return toJSONError ( ctx , err , args . BucketName )
}
return nil
}
bucketPolicy , err := BucketAccessPolicyToPolicy ( policyInfo )
if err != nil {
// This should not happen.
return toJSONError ( ctx , err , args . BucketName )
}
policyData , err := json . Marshal ( bucketPolicy )
if err != nil {
return toJSONError ( ctx , err , args . BucketName )
}
if err = core . SetBucketPolicy ( ctx , args . BucketName , string ( policyData ) ) ; err != nil {
return toJSONError ( ctx , err , args . BucketName )
}
} else {
bucketPolicy , err := globalPolicySys . Get ( args . BucketName )
if err != nil {
if _ , ok := err . ( BucketPolicyNotFound ) ; ! ok {
return toJSONError ( ctx , err , args . BucketName )
}
}
policyInfo , err := PolicyToBucketAccessPolicy ( bucketPolicy )
if err != nil {
// This should not happen.
return toJSONError ( ctx , err , args . BucketName )
}
policyInfo . Statements = miniogopolicy . SetPolicy ( policyInfo . Statements , policyType , args . BucketName , args . Prefix )
if len ( policyInfo . Statements ) == 0 {
if err = globalBucketMetadataSys . Update ( args . BucketName , bucketPolicyConfig , nil ) ; err != nil {
return toJSONError ( ctx , err , args . BucketName )
}
return nil
}
bucketPolicy , err = BucketAccessPolicyToPolicy ( policyInfo )
if err != nil {
// This should not happen.
return toJSONError ( ctx , err , args . BucketName )
}
configData , err := json . Marshal ( bucketPolicy )
if err != nil {
return toJSONError ( ctx , err , args . BucketName )
}
// Parse validate and save bucket policy.
if err = globalBucketMetadataSys . Update ( args . BucketName , bucketPolicyConfig , configData ) ; err != nil {
return toJSONError ( ctx , err , args . BucketName )
}
}
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 {
ctx := newWebContext ( r , args , "WebPresignedGet" )
claims , owner , authErr := webRequestAuthenticate ( r )
if authErr != nil {
return toJSONError ( ctx , authErr )
}
var creds auth . Credentials
if ! owner {
var ok bool
creds , ok = globalIAMSys . GetUser ( claims . AccessKey )
if ! ok {
return toJSONError ( ctx , errInvalidAccessKeyID )
}
} else {
creds = globalActiveCred
}
region := globalServerRegion
if args . BucketName == "" || args . ObjectName == "" {
return & json2 . Error {
Message : "Bucket and Object are mandatory arguments." ,
}
}
// Check if bucket is a reserved bucket name or invalid.
if isReservedOrInvalidBucket ( args . BucketName , false ) {
return toJSONError ( ctx , errInvalidBucketName , args . BucketName )
}
// Check if the user indeed has GetObject access,
// if not we do not need to generate presigned URLs
if ! globalIAMSys . IsAllowed ( iampolicy . Args {
AccountName : claims . AccessKey ,
Action : iampolicy . GetObjectAction ,
BucketName : args . BucketName ,
ConditionValues : getConditionValues ( r , "" , claims . AccessKey , claims . Map ( ) ) ,
IsOwner : owner ,
ObjectName : args . ObjectName ,
Claims : claims . Map ( ) ,
} ) {
return toJSONError ( ctx , errPresignedNotAllowed )
}
reply . UIVersion = Version
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
sessionToken := creds . SessionToken
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 ( xhttp . AmzAlgorithm , signV4Algorithm )
query . Set ( xhttp . AmzCredential , credential )
query . Set ( xhttp . AmzDate , dateStr )
query . Set ( xhttp . AmzExpires , expiryStr )
query . Set ( xhttp . ContentDisposition , fmt . Sprintf ( "attachment; filename=\"%s\"" , object ) )
// Set session token if available.
if sessionToken != "" {
query . Set ( xhttp . AmzSecurityToken , sessionToken )
}
query . Set ( xhttp . AmzSignedHeaders , "host" )
queryStr := s3utils . QueryEncode ( query )
path := SlashSeparator + 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 , http . MethodGet )
stringToSign := getStringToSign ( canonicalRequest , date , getScope ( date , region ) )
signingKey := getSigningKey ( secretKey , date , region , serviceS3 )
signature := getSignature ( signingKey , stringToSign )
return host + s3utils . EncodePath ( path ) + "?" + queryStr + "&" + xhttp . AmzSignature + "=" + signature
}
// DiscoveryDocResp - OpenID discovery document reply.
type DiscoveryDocResp struct {
DiscoveryDoc openid . DiscoveryDoc
UIVersion string ` json:"uiVersion" `
ClientID string ` json:"clientId" `
}
// GetDiscoveryDoc - returns parsed value of OpenID discovery document
func ( web * webAPIHandlers ) GetDiscoveryDoc ( r * http . Request , args * WebGenericArgs , reply * DiscoveryDocResp ) error {
if globalOpenIDConfig . DiscoveryDoc . AuthEndpoint != "" {
reply . DiscoveryDoc = globalOpenIDConfig . DiscoveryDoc
reply . ClientID = globalOpenIDConfig . ClientID
}
reply . UIVersion = Version
return nil
}
// LoginSTSArgs - login arguments.
type LoginSTSArgs struct {
Token string ` json:"token" form:"token" `
}
var errSTSNotInitialized = errors . New ( "STS API not initialized, please configure STS support" )
// LoginSTS - STS user login handler.
func ( web * webAPIHandlers ) LoginSTS ( r * http . Request , args * LoginSTSArgs , reply * LoginRep ) error {
ctx := newWebContext ( r , args , "WebLoginSTS" )
if globalOpenIDValidators == nil {
return toJSONError ( ctx , errSTSNotInitialized )
}
v , err := globalOpenIDValidators . Get ( "jwt" )
if err != nil {
logger . LogIf ( ctx , err )
return toJSONError ( ctx , errSTSNotInitialized )
}
m , err := v . Validate ( args . Token , "" )
if err != nil {
return toJSONError ( ctx , err )
}
// JWT has requested a custom claim with policy value set.
// This is a MinIO STS API specific value, this value should
// be set and configured on your identity provider as part of
// JWT custom claims.
var policyName string
policySet , ok := iampolicy . GetPoliciesFromClaims ( m , iamPolicyClaimNameOpenID ( ) )
if ok {
policyName = globalIAMSys . CurrentPolicies ( strings . Join ( policySet . ToSlice ( ) , "," ) )
}
if policyName == "" && globalPolicyOPA == nil {
return toJSONError ( ctx , fmt . Errorf ( "%s claim missing from the JWT token, credentials will not be generated" , iamPolicyClaimNameOpenID ( ) ) )
}
m [ iamPolicyClaimNameOpenID ( ) ] = policyName
secret := globalActiveCred . SecretKey
cred , err := auth . GetNewCredentialsWithMetadata ( m , secret )
if err != nil {
return toJSONError ( ctx , err )
}
// Set the newly generated credentials.
if err = globalIAMSys . SetTempUser ( cred . AccessKey , cred , policyName ) ; err != nil {
return toJSONError ( ctx , err )
}
// Notify all other MinIO peers to reload temp users
for _ , nerr := range globalNotificationSys . LoadUser ( cred . AccessKey , true ) {
if nerr . Err != nil {
logger . GetReqInfo ( ctx ) . SetTags ( "peerAddress" , nerr . Host . String ( ) )
logger . LogIf ( ctx , nerr . Err )
}
}
reply . Token = cred . SessionToken
reply . UIVersion = Version
return nil
}
// toJSONError converts regular errors into more user friendly
// and consumable error message for the browser UI.
func toJSONError ( ctx context . Context , err error , params ... string ) ( jerr * json2 . Error ) {
apiErr := toWebAPIError ( ctx , 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 ( ctx context . Context , err error ) APIError {
switch err {
case errNoAuthToken :
return APIError {
Code : "WebTokenMissing" ,
HTTPStatusCode : http . StatusBadRequest ,
Description : err . Error ( ) ,
}
case errSTSNotInitialized :
return APIError ( stsErrCodes . ToSTSErr ( ErrSTSNotInitialized ) )
case errServerNotInitialized :
return APIError {
Code : "XMinioServerNotInitialized" ,
HTTPStatusCode : http . StatusServiceUnavailable ,
Description : err . Error ( ) ,
}
case errAuthentication , auth . ErrInvalidAccessKeyLength ,
auth . ErrInvalidSecretKeyLength , errInvalidAccessKeyID , errAccessDenied , errLockedObject :
return APIError {
Code : "AccessDenied" ,
HTTPStatusCode : http . StatusForbidden ,
Description : err . Error ( ) ,
}
case errSizeUnspecified :
return APIError {
Code : "InvalidRequest" ,
HTTPStatusCode : http . StatusBadRequest ,
Description : err . Error ( ) ,
}
case errChangeCredNotAllowed :
return APIError {
Code : "MethodNotAllowed" ,
HTTPStatusCode : http . StatusMethodNotAllowed ,
Description : err . Error ( ) ,
}
case errInvalidBucketName :
return APIError {
Code : "InvalidBucketName" ,
HTTPStatusCode : http . StatusBadRequest ,
Description : err . Error ( ) ,
}
case errInvalidArgument :
return APIError {
Code : "InvalidArgument" ,
HTTPStatusCode : http . StatusBadRequest ,
Description : err . Error ( ) ,
}
case errEncryptedObject :
return getAPIError ( ErrSSEEncryptedObject )
case errInvalidEncryptionParameters :
return getAPIError ( ErrInvalidEncryptionParameters )
case errObjectTampered :
return getAPIError ( ErrObjectTampered )
case errMethodNotAllowed :
return getAPIError ( ErrMethodNotAllowed )
}
// Convert error type to api error code.
switch err . ( type ) {
case StorageFull :
return getAPIError ( ErrStorageFull )
case BucketQuotaExceeded :
return getAPIError ( ErrAdminBucketQuotaExceeded )
case BucketNotFound :
return getAPIError ( ErrNoSuchBucket )
case BucketNotEmpty :
return getAPIError ( ErrBucketNotEmpty )
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 NotImplemented :
return APIError {
Code : "NotImplemented" ,
HTTPStatusCode : http . StatusBadRequest ,
Description : "Functionality not implemented" ,
}
}
// Log unexpected and unhandled errors.
logger . LogIf ( ctx , err )
return toAPIError ( ctx , err )
}
// writeWebErrorResponse - set HTTP status code and write error description to the body.
func writeWebErrorResponse ( w http . ResponseWriter , err error ) {
reqInfo := & logger . ReqInfo {
DeploymentID : globalDeploymentID ,
}
ctx := logger . SetReqInfo ( GlobalContext , reqInfo )
apiErr := toWebAPIError ( ctx , err )
w . WriteHeader ( apiErr . HTTPStatusCode )
w . Write ( [ ] byte ( apiErr . Description ) )
}