minio/cmd/web-handlers.go
2020-08-18 12:09:42 -07:00

2276 lines
67 KiB
Go

/*
* MinIO Cloud Storage, (C) 2016-2019 MinIO, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package cmd
import (
"context"
"encoding/json"
"encoding/xml"
"errors"
"fmt"
"io"
"net/http"
"net/url"
"os"
"path"
"runtime"
"strconv"
"strings"
"time"
"github.com/gorilla/mux"
"github.com/gorilla/rpc/v2/json2"
"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/browser"
"github.com/minio/minio/cmd/config/etcd/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/policy"
"github.com/minio/minio/pkg/bucket/replication"
"github.com/minio/minio/pkg/event"
"github.com/minio/minio/pkg/handlers"
"github.com/minio/minio/pkg/hash"
iampolicy "github.com/minio/minio/pkg/iam/policy"
"github.com/minio/minio/pkg/ioutil"
)
// 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{}
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 = browser.UIVersion
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 = 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 {
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 {
// 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 = browser.UIVersion
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 = browser.UIVersion
sendEvent(eventArgs{
EventName: event.BucketCreated,
BucketName: args.BucketName,
ReqParams: extractReqParams(r),
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 = browser.UIVersion
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 using etcdctl", err))
return toJSONError(ctx, err)
}
}
sendEvent(eventArgs{
EventName: event.BucketRemoved,
BucketName: args.BucketName,
ReqParams: extractReqParams(r),
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 && err != dns.ErrNoEntriesFound {
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 = 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"`
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 = browser.UIVersion
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 := getRemoteInstanceClientLongTimeout(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, 0)
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.
lo, err := listObjects(ctx, args.BucketName, args.Prefix, nextMarker, SlashSeparator, 1000)
if err != nil {
return &json2.Error{Message: err.Error()}
}
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,
})
}
nextMarker = lo.NextMarker
// 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
}
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 = browser.UIVersion
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 := getRemoteInstanceClientLongTimeout(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),
}
var err error
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)
}
}
_, err = deleteObject(ctx, objectAPI, web.CacheAPI(), args.BucketName, objectName, r, opts)
logger.LogIf(ctx, err)
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
}
objects = append(objects, ObjectToDelete{
ObjectName: obj.Name,
})
}
// Nothing to do.
if len(objects) == 0 {
break next
}
// Deletes a list of objects.
_, errs := deleteObjects(ctx, args.BucketName, objects, opts)
for _, err := range errs {
if err != nil {
logger.LogIf(ctx, err)
break next
}
}
}
}
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 = 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 {
ctx := newWebContext(r, args, "WebGenerateAuth")
_, owner, authErr := webRequestAuthenticate(r)
if authErr != nil {
return toJSONError(ctx, authErr)
}
if !owner {
return toJSONError(ctx, errAccessDenied)
}
cred, err := auth.GetNewCredentials()
if err != nil {
return toJSONError(ctx, err)
}
reply.AccessKey = cred.AccessKey
reply.SecretKey = cred.SecretKey
reply.UIVersion = browser.UIVersion
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)
}
// 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 prevCred.SecretKey != args.CurrentSecretKey {
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 = 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 {
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 = browser.UIVersion
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(w, r, "WebUpload", claims.Map())
objectAPI := web.ObjectAPI()
if objectAPI == nil {
writeWebErrorResponse(w, errServerNotInitialized)
return
}
vars := mux.Vars(r)
bucket := vars["bucket"]
object, err := url.PathUnescape(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: object,
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
_, err = globalBucketSSEConfigSys.Get(bucket)
if (globalAutoEncryption || err == nil) && !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
}
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, globalCLIContext.StrictS3Compat)
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(size, 10)
actualReader, err := hash.NewReader(reader, size, "", "", actualSize, globalCLIContext.StrictS3Compat)
if err != nil {
writeWebErrorResponse(w, err)
return
}
// Set compression metrics.
size = -1 // Since compressed size is un-predictable.
s2c := newS2CompressReader(actualReader)
defer s2c.Close()
reader = s2c
hashReader, err = hash.NewReader(reader, size, "", "", actualSize, globalCLIContext.StrictS3Compat)
if err != nil {
writeWebErrorResponse(w, err)
return
}
}
mustReplicate := mustReplicateWeb(ctx, r, bucket, object, metadata, "", replPerms)
if mustReplicate {
metadata[xhttp.AmzBucketReplicationStatus] = string(replication.Pending)
}
pReader = NewPutObjReader(hashReader, nil, nil)
// 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 crypto.IsRequested(r.Header) && !HasSuffix(object, SlashSeparator) { // handle SSE requests
rawReader := hashReader
var objectEncryptionKey crypto.ObjectKey
reader, 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(reader, info.EncryptedSize(), "", "", size, globalCLIContext.StrictS3Compat)
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
return
}
pReader = NewPutObjReader(rawReader, hashReader, &objectEncryptionKey)
}
}
// 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[xhttp.AmzObjectLockMode] = string(retentionMode)
opts.UserDefined[xhttp.AmzObjectLockRetainUntilDate] = retentionDate.UTC().Format(iso8601TimeFormat)
}
objInfo, err := putObject(GlobalContext, bucket, object, pReader, 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))
}
}
}
if mustReplicate {
defer replicateObject(GlobalContext, bucket, object, objInfo.VersionID, objectAPI, &eventArgs{
EventName: event.ObjectCreatedPut,
BucketName: bucket,
Object: objInfo,
ReqParams: extractReqParams(r),
RespElements: extractRespElements(w),
UserAgent: r.UserAgent(),
Host: handlers.GetSourceIP(r),
}, false)
}
// Notify object created event.
sendEvent(eventArgs{
EventName: event.ObjectCreatedPut,
BucketName: bucket,
Object: objInfo,
ReqParams: extractReqParams(r),
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")
vars := mux.Vars(r)
claims, owner, authErr := webTokenAuthenticate(r.URL.Query().Get("token"))
defer logger.AuditLog(w, r, "WebDownload", claims.Map())
objectAPI := web.ObjectAPI()
if objectAPI == nil {
writeWebErrorResponse(w, errServerNotInitialized)
return
}
bucket := vars["bucket"]
object, err := url.PathUnescape(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() {
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))
}
}
}
// Set Parts Count Header
if opts.PartNumber > 0 && len(objInfo.Parts) > 0 {
setPartsCountHeaders(w, objInfo)
}
if err = setObjectHeaders(w, objInfo, nil); 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
}
}
// 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: 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(w, r, "WebDownloadZip", 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()
for i, object := range args.Objects {
// 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,
}
if 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 {
writeWebErrorResponse(w, errUnexpected)
return err
}
httpWriter := ioutil.WriteOnClose(writer)
// Write object content to response body
if _, err = io.Copy(httpWriter, gr); err != nil {
httpWriter.Close()
if !httpWriter.HasWritten() { // write error response only if no data or headers has been written to client yet
writeWebErrorResponse(w, err)
}
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
}
}
// 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,
})
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 = 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 {
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 = browser.UIVersion
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 = browser.UIVersion
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 = 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
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)
// 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 = browser.UIVersion
return nil
}
// LoginSTSArgs - login arguments.
type LoginSTSArgs struct {
Token string `json:"token" form:"token"`
}
// LoginSTS - STS user login handler.
func (web *webAPIHandlers) LoginSTS(r *http.Request, args *LoginSTSArgs, reply *LoginRep) error {
ctx := newWebContext(r, args, "WebLoginSTS")
v := url.Values{}
v.Set("Action", webIdentity)
v.Set("WebIdentityToken", args.Token)
v.Set("Version", stsAPIVersion)
scheme := "http"
if sourceScheme := handlers.GetSourceScheme(r); sourceScheme != "" {
scheme = sourceScheme
}
if globalIsSSL {
scheme = "https"
}
u := &url.URL{
Scheme: scheme,
Host: r.Host,
}
u.RawQuery = v.Encode()
req, err := http.NewRequest(http.MethodPost, u.String(), nil)
if err != nil {
return toJSONError(ctx, err)
}
clnt := &http.Client{
Transport: NewGatewayHTTPTransport(),
}
defer clnt.CloseIdleConnections()
resp, err := clnt.Do(req)
if err != nil {
return toJSONError(ctx, err)
}
defer xhttp.DrainBody(resp.Body)
if resp.StatusCode != http.StatusOK {
return toJSONError(ctx, errors.New(resp.Status))
}
a := AssumeRoleWithWebIdentityResponse{}
if err = xml.NewDecoder(resp.Body).Decode(&a); err != nil {
return toJSONError(ctx, err)
}
reply.Token = a.Result.Credentials.SessionToken
reply.UIVersion = browser.UIVersion
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 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))
}