This patch adds 'Err' prefix for all standard API error codes and also adds a proper type for them.
166 lines
4.4 KiB
Go
166 lines
4.4 KiB
Go
/*
|
|
* Minio Cloud Storage, (C) 2015 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 main
|
|
|
|
import (
|
|
"crypto/sha256"
|
|
"encoding/hex"
|
|
"net/http"
|
|
"strings"
|
|
|
|
"github.com/minio/minio/pkg/s3/signature4"
|
|
)
|
|
|
|
const (
|
|
signV4Algorithm = "AWS4-HMAC-SHA256"
|
|
jwtAlgorithm = "Bearer"
|
|
)
|
|
|
|
// Verify if request has JWT.
|
|
func isRequestJWT(r *http.Request) bool {
|
|
if _, ok := r.Header["Authorization"]; ok {
|
|
if strings.HasPrefix(r.Header.Get("Authorization"), jwtAlgorithm) {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// Verify if request has AWS Signature Version '4'.
|
|
func isRequestSignatureV4(r *http.Request) bool {
|
|
if _, ok := r.Header["Authorization"]; ok {
|
|
if strings.HasPrefix(r.Header.Get("Authorization"), signV4Algorithm) {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// Verify if request has AWS Presignature Version '4'.
|
|
func isRequestPresignedSignatureV4(r *http.Request) bool {
|
|
if _, ok := r.URL.Query()["X-Amz-Credential"]; ok {
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
// Verify if request has AWS Post policy Signature Version '4'.
|
|
func isRequestPostPolicySignatureV4(r *http.Request) bool {
|
|
if _, ok := r.Header["Content-Type"]; ok {
|
|
if strings.Contains(r.Header.Get("Content-Type"), "multipart/form-data") && r.Method == "POST" {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// Verify if incoming request is anonymous.
|
|
func isRequestAnonymous(r *http.Request) bool {
|
|
if isRequestJWT(r) || isRequestSignatureV4(r) || isRequestPresignedSignatureV4(r) || isRequestPostPolicySignatureV4(r) {
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
|
|
// Authorization type.
|
|
type authType int
|
|
|
|
// List of all supported auth types.
|
|
const (
|
|
authTypeUnknown authType = iota
|
|
authTypeAnonymous
|
|
authTypePresigned
|
|
authTypePostPolicy
|
|
authTypeSigned
|
|
authTypeJWT
|
|
)
|
|
|
|
// Get request authentication type.
|
|
func getRequestAuthType(r *http.Request) authType {
|
|
if isRequestSignatureV4(r) {
|
|
return authTypeSigned
|
|
} else if isRequestPresignedSignatureV4(r) {
|
|
return authTypePresigned
|
|
} else if isRequestJWT(r) {
|
|
return authTypeJWT
|
|
} else if isRequestPostPolicySignatureV4(r) {
|
|
return authTypePostPolicy
|
|
} else if _, ok := r.Header["Authorization"]; !ok {
|
|
return authTypeAnonymous
|
|
}
|
|
return authTypeUnknown
|
|
}
|
|
|
|
// Verify if request has valid AWS Signature Version '4'.
|
|
func isReqAuthenticated(sign *signature4.Sign, r *http.Request) (s3Error APIErrorCode) {
|
|
auth := sign.SetHTTPRequestToVerify(r)
|
|
if isRequestSignatureV4(r) {
|
|
dummyPayload := sha256.Sum256([]byte(""))
|
|
ok, err := auth.DoesSignatureMatch(hex.EncodeToString(dummyPayload[:]))
|
|
if err != nil {
|
|
errorIf(err.Trace(), "Signature verification failed.", nil)
|
|
return ErrInternalError
|
|
}
|
|
if !ok {
|
|
return ErrSignatureDoesNotMatch
|
|
}
|
|
return ErrNone
|
|
} else if isRequestPresignedSignatureV4(r) {
|
|
ok, err := auth.DoesPresignedSignatureMatch()
|
|
if err != nil {
|
|
errorIf(err.Trace(), "Presigned signature verification failed.", nil)
|
|
return ErrInternalError
|
|
}
|
|
if !ok {
|
|
return ErrSignatureDoesNotMatch
|
|
}
|
|
return ErrNone
|
|
}
|
|
return ErrAccessDenied
|
|
}
|
|
|
|
// authHandler - handles all the incoming authorization headers and
|
|
// validates them if possible.
|
|
type authHandler struct {
|
|
handler http.Handler
|
|
}
|
|
|
|
// setAuthHandler to validate authorization header for the incoming request.
|
|
func setAuthHandler(h http.Handler) http.Handler {
|
|
return authHandler{h}
|
|
}
|
|
|
|
// handler for validating incoming authorization headers.
|
|
func (a authHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
|
|
switch getRequestAuthType(r) {
|
|
case authTypeAnonymous, authTypePresigned, authTypeSigned, authTypePostPolicy:
|
|
// Let top level caller validate for anonymous and known
|
|
// signed requests.
|
|
a.handler.ServeHTTP(w, r)
|
|
return
|
|
case authTypeJWT:
|
|
// Validate Authorization header if its valid for JWT request.
|
|
if !isJWTReqAuthenticated(r) {
|
|
w.WriteHeader(http.StatusUnauthorized)
|
|
return
|
|
}
|
|
a.handler.ServeHTTP(w, r)
|
|
default:
|
|
writeErrorResponse(w, r, ErrSignatureVersionNotSupported, r.URL.Path)
|
|
return
|
|
}
|
|
}
|