2016-02-16 02:42:39 +01:00
|
|
|
/*
|
2016-07-19 08:56:27 +02:00
|
|
|
* Minio Cloud Storage, (C) 2015, 2016 Minio, Inc.
|
2016-02-16 02:42:39 +01:00
|
|
|
*
|
|
|
|
* 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.
|
|
|
|
*/
|
|
|
|
|
2016-08-19 01:23:42 +02:00
|
|
|
package cmd
|
2016-02-16 02:42:39 +01:00
|
|
|
|
2016-02-22 02:57:05 +01:00
|
|
|
import (
|
2016-03-13 01:08:15 +01:00
|
|
|
"bytes"
|
|
|
|
"io/ioutil"
|
2016-02-22 02:57:05 +01:00
|
|
|
"net/http"
|
|
|
|
"strings"
|
2016-02-16 02:42:39 +01:00
|
|
|
)
|
|
|
|
|
2016-07-01 23:34:40 +02:00
|
|
|
// Verify if the request http Header "x-amz-content-sha256" == "UNSIGNED-PAYLOAD"
|
|
|
|
func isRequestUnsignedPayload(r *http.Request) bool {
|
|
|
|
return r.Header.Get("x-amz-content-sha256") == unsignedPayload
|
|
|
|
}
|
|
|
|
|
2016-02-22 02:57:05 +01:00
|
|
|
// Verify if request has JWT.
|
|
|
|
func isRequestJWT(r *http.Request) bool {
|
2016-08-09 05:56:29 +02:00
|
|
|
return strings.HasPrefix(r.Header.Get("Authorization"), jwtAlgorithm)
|
2016-02-22 02:57:05 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
// Verify if request has AWS Signature Version '4'.
|
|
|
|
func isRequestSignatureV4(r *http.Request) bool {
|
2016-08-09 05:56:29 +02:00
|
|
|
return strings.HasPrefix(r.Header.Get("Authorization"), signV4Algorithm)
|
2016-02-22 02:57:05 +01:00
|
|
|
}
|
|
|
|
|
2016-09-30 23:32:13 +02:00
|
|
|
// Verify if request has AWS Signature Version '2'.
|
|
|
|
func isRequestSignatureV2(r *http.Request) bool {
|
|
|
|
return (!strings.HasPrefix(r.Header.Get("Authorization"), signV4Algorithm) &&
|
|
|
|
strings.HasPrefix(r.Header.Get("Authorization"), signV2Algorithm))
|
|
|
|
}
|
|
|
|
|
2016-08-09 05:56:29 +02:00
|
|
|
// Verify if request has AWS PreSign Version '4'.
|
2016-02-22 02:57:05 +01:00
|
|
|
func isRequestPresignedSignatureV4(r *http.Request) bool {
|
2016-08-09 05:56:29 +02:00
|
|
|
_, ok := r.URL.Query()["X-Amz-Credential"]
|
|
|
|
return ok
|
2016-02-22 02:57:05 +01:00
|
|
|
}
|
|
|
|
|
2016-09-30 23:32:13 +02:00
|
|
|
// Verify request has AWS PreSign Version '2'.
|
|
|
|
func isRequestPresignedSignatureV2(r *http.Request) bool {
|
|
|
|
_, ok := r.URL.Query()["AWSAccessKeyId"]
|
|
|
|
return ok
|
|
|
|
}
|
|
|
|
|
2016-02-22 02:57:05 +01:00
|
|
|
// Verify if request has AWS Post policy Signature Version '4'.
|
|
|
|
func isRequestPostPolicySignatureV4(r *http.Request) bool {
|
2017-01-18 21:24:34 +01:00
|
|
|
return strings.Contains(r.Header.Get("Content-Type"), "multipart/form-data") && r.Method == httpPOST
|
2016-08-09 05:56:29 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
// Verify if the request has AWS Streaming Signature Version '4'. This is only valid for 'PUT' operation.
|
|
|
|
func isRequestSignStreamingV4(r *http.Request) bool {
|
2017-02-20 21:07:03 +01:00
|
|
|
return r.Header.Get("x-amz-content-sha256") == streamingContentSHA256 &&
|
|
|
|
r.Method == httpPUT
|
2016-02-22 02:57:05 +01:00
|
|
|
}
|
|
|
|
|
accessPolicy: Implement Put, Get, Delete access policy.
This patch implements Get,Put,Delete bucket policies
Supporting - http://docs.aws.amazon.com/AmazonS3/latest/dev/access-policy-language-overview.html
Currently supports following actions.
"*": true,
"s3:*": true,
"s3:GetObject": true,
"s3:ListBucket": true,
"s3:PutObject": true,
"s3:CreateBucket": true,
"s3:GetBucketLocation": true,
"s3:DeleteBucket": true,
"s3:DeleteObject": true,
"s3:AbortMultipartUpload": true,
"s3:ListBucketMultipartUploads": true,
"s3:ListMultipartUploadParts": true,
following conditions for "StringEquals" and "StringNotEquals"
"s3:prefix", "s3:max-keys"
2016-02-04 01:46:56 +01:00
|
|
|
// Authorization type.
|
|
|
|
type authType int
|
|
|
|
|
|
|
|
// List of all supported auth types.
|
|
|
|
const (
|
|
|
|
authTypeUnknown authType = iota
|
|
|
|
authTypeAnonymous
|
|
|
|
authTypePresigned
|
2016-09-30 23:32:13 +02:00
|
|
|
authTypePresignedV2
|
accessPolicy: Implement Put, Get, Delete access policy.
This patch implements Get,Put,Delete bucket policies
Supporting - http://docs.aws.amazon.com/AmazonS3/latest/dev/access-policy-language-overview.html
Currently supports following actions.
"*": true,
"s3:*": true,
"s3:GetObject": true,
"s3:ListBucket": true,
"s3:PutObject": true,
"s3:CreateBucket": true,
"s3:GetBucketLocation": true,
"s3:DeleteBucket": true,
"s3:DeleteObject": true,
"s3:AbortMultipartUpload": true,
"s3:ListBucketMultipartUploads": true,
"s3:ListMultipartUploadParts": true,
following conditions for "StringEquals" and "StringNotEquals"
"s3:prefix", "s3:max-keys"
2016-02-04 01:46:56 +01:00
|
|
|
authTypePostPolicy
|
2016-08-09 05:56:29 +02:00
|
|
|
authTypeStreamingSigned
|
accessPolicy: Implement Put, Get, Delete access policy.
This patch implements Get,Put,Delete bucket policies
Supporting - http://docs.aws.amazon.com/AmazonS3/latest/dev/access-policy-language-overview.html
Currently supports following actions.
"*": true,
"s3:*": true,
"s3:GetObject": true,
"s3:ListBucket": true,
"s3:PutObject": true,
"s3:CreateBucket": true,
"s3:GetBucketLocation": true,
"s3:DeleteBucket": true,
"s3:DeleteObject": true,
"s3:AbortMultipartUpload": true,
"s3:ListBucketMultipartUploads": true,
"s3:ListMultipartUploadParts": true,
following conditions for "StringEquals" and "StringNotEquals"
"s3:prefix", "s3:max-keys"
2016-02-04 01:46:56 +01:00
|
|
|
authTypeSigned
|
2016-09-30 23:32:13 +02:00
|
|
|
authTypeSignedV2
|
accessPolicy: Implement Put, Get, Delete access policy.
This patch implements Get,Put,Delete bucket policies
Supporting - http://docs.aws.amazon.com/AmazonS3/latest/dev/access-policy-language-overview.html
Currently supports following actions.
"*": true,
"s3:*": true,
"s3:GetObject": true,
"s3:ListBucket": true,
"s3:PutObject": true,
"s3:CreateBucket": true,
"s3:GetBucketLocation": true,
"s3:DeleteBucket": true,
"s3:DeleteObject": true,
"s3:AbortMultipartUpload": true,
"s3:ListBucketMultipartUploads": true,
"s3:ListMultipartUploadParts": true,
following conditions for "StringEquals" and "StringNotEquals"
"s3:prefix", "s3:max-keys"
2016-02-04 01:46:56 +01:00
|
|
|
authTypeJWT
|
|
|
|
)
|
|
|
|
|
|
|
|
// Get request authentication type.
|
|
|
|
func getRequestAuthType(r *http.Request) authType {
|
2016-09-30 23:32:13 +02:00
|
|
|
if isRequestSignatureV2(r) {
|
|
|
|
return authTypeSignedV2
|
|
|
|
} else if isRequestPresignedSignatureV2(r) {
|
|
|
|
return authTypePresignedV2
|
|
|
|
} else if isRequestSignStreamingV4(r) {
|
2016-08-09 05:56:29 +02:00
|
|
|
return authTypeStreamingSigned
|
|
|
|
} else if isRequestSignatureV4(r) {
|
accessPolicy: Implement Put, Get, Delete access policy.
This patch implements Get,Put,Delete bucket policies
Supporting - http://docs.aws.amazon.com/AmazonS3/latest/dev/access-policy-language-overview.html
Currently supports following actions.
"*": true,
"s3:*": true,
"s3:GetObject": true,
"s3:ListBucket": true,
"s3:PutObject": true,
"s3:CreateBucket": true,
"s3:GetBucketLocation": true,
"s3:DeleteBucket": true,
"s3:DeleteObject": true,
"s3:AbortMultipartUpload": true,
"s3:ListBucketMultipartUploads": true,
"s3:ListMultipartUploadParts": true,
following conditions for "StringEquals" and "StringNotEquals"
"s3:prefix", "s3:max-keys"
2016-02-04 01:46:56 +01:00
|
|
|
return authTypeSigned
|
|
|
|
} else if isRequestPresignedSignatureV4(r) {
|
|
|
|
return authTypePresigned
|
|
|
|
} else if isRequestJWT(r) {
|
|
|
|
return authTypeJWT
|
|
|
|
} else if isRequestPostPolicySignatureV4(r) {
|
|
|
|
return authTypePostPolicy
|
2016-03-11 02:36:48 +01:00
|
|
|
} else if _, ok := r.Header["Authorization"]; !ok {
|
|
|
|
return authTypeAnonymous
|
accessPolicy: Implement Put, Get, Delete access policy.
This patch implements Get,Put,Delete bucket policies
Supporting - http://docs.aws.amazon.com/AmazonS3/latest/dev/access-policy-language-overview.html
Currently supports following actions.
"*": true,
"s3:*": true,
"s3:GetObject": true,
"s3:ListBucket": true,
"s3:PutObject": true,
"s3:CreateBucket": true,
"s3:GetBucketLocation": true,
"s3:DeleteBucket": true,
"s3:DeleteObject": true,
"s3:AbortMultipartUpload": true,
"s3:ListBucketMultipartUploads": true,
"s3:ListMultipartUploadParts": true,
following conditions for "StringEquals" and "StringNotEquals"
"s3:prefix", "s3:max-keys"
2016-02-04 01:46:56 +01:00
|
|
|
}
|
|
|
|
return authTypeUnknown
|
|
|
|
}
|
|
|
|
|
2016-11-21 22:51:05 +01:00
|
|
|
func checkRequestAuthType(r *http.Request, bucket, policyAction, region string) APIErrorCode {
|
|
|
|
reqAuthType := getRequestAuthType(r)
|
|
|
|
|
|
|
|
switch reqAuthType {
|
|
|
|
case authTypePresignedV2, authTypeSignedV2:
|
|
|
|
// Signature V2 validation.
|
|
|
|
s3Error := isReqAuthenticatedV2(r)
|
|
|
|
if s3Error != ErrNone {
|
2017-05-31 09:11:06 +02:00
|
|
|
errorIf(errSignatureMismatch, "%s", dumpRequest(r))
|
2016-11-21 22:51:05 +01:00
|
|
|
}
|
|
|
|
return s3Error
|
|
|
|
case authTypeSigned, authTypePresigned:
|
|
|
|
s3Error := isReqAuthenticated(r, region)
|
|
|
|
if s3Error != ErrNone {
|
2017-05-31 09:11:06 +02:00
|
|
|
errorIf(errSignatureMismatch, "%s", dumpRequest(r))
|
2016-11-21 22:51:05 +01:00
|
|
|
}
|
|
|
|
return s3Error
|
|
|
|
}
|
|
|
|
|
|
|
|
if reqAuthType == authTypeAnonymous && policyAction != "" {
|
|
|
|
// http://docs.aws.amazon.com/AmazonS3/latest/dev/using-with-s3-actions.html
|
2017-08-05 10:00:05 +02:00
|
|
|
sourceIP := getSourceIPAddress(r)
|
2017-11-15 01:56:24 +01:00
|
|
|
resource, err := getResource(r.URL.Path, r.Host, globalDomainName)
|
|
|
|
if err != nil {
|
|
|
|
return ErrInternalError
|
|
|
|
}
|
|
|
|
return enforceBucketPolicy(bucket, policyAction, resource,
|
2017-08-05 10:00:05 +02:00
|
|
|
r.Referer(), sourceIP, r.URL.Query())
|
2016-11-21 22:51:05 +01:00
|
|
|
}
|
2016-03-13 01:08:15 +01:00
|
|
|
|
2016-11-21 22:51:05 +01:00
|
|
|
// By default return ErrAccessDenied
|
|
|
|
return ErrAccessDenied
|
2016-03-13 01:08:15 +01:00
|
|
|
}
|
|
|
|
|
2016-09-30 23:32:13 +02:00
|
|
|
// Verify if request has valid AWS Signature Version '2'.
|
|
|
|
func isReqAuthenticatedV2(r *http.Request) (s3Error APIErrorCode) {
|
|
|
|
if isRequestSignatureV2(r) {
|
|
|
|
return doesSignV2Match(r)
|
|
|
|
}
|
|
|
|
return doesPresignV2SignatureMatch(r)
|
|
|
|
}
|
|
|
|
|
2017-04-10 18:58:08 +02:00
|
|
|
func reqSignatureV4Verify(r *http.Request, region string) (s3Error APIErrorCode) {
|
|
|
|
sha256sum := getContentSha256Cksum(r)
|
|
|
|
switch {
|
|
|
|
case isRequestSignatureV4(r):
|
|
|
|
return doesSignatureMatch(sha256sum, r, region)
|
|
|
|
case isRequestPresignedSignatureV4(r):
|
|
|
|
return doesPresignedSignatureMatch(sha256sum, r, region)
|
|
|
|
default:
|
|
|
|
return ErrAccessDenied
|
2016-10-03 00:51:49 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2016-02-22 02:57:05 +01:00
|
|
|
// Verify if request has valid AWS Signature Version '4'.
|
2016-09-30 00:51:00 +02:00
|
|
|
func isReqAuthenticated(r *http.Request, region string) (s3Error APIErrorCode) {
|
2016-03-13 01:08:15 +01:00
|
|
|
if r == nil {
|
|
|
|
return ErrInternalError
|
|
|
|
}
|
2017-04-10 18:58:08 +02:00
|
|
|
if errCode := reqSignatureV4Verify(r, region); errCode != ErrNone {
|
|
|
|
return errCode
|
|
|
|
}
|
2016-04-29 23:24:10 +02:00
|
|
|
payload, err := ioutil.ReadAll(r.Body)
|
|
|
|
if err != nil {
|
2016-09-30 23:32:13 +02:00
|
|
|
errorIf(err, "Unable to read request body for signature verification")
|
2016-03-13 01:08:15 +01:00
|
|
|
return ErrInternalError
|
|
|
|
}
|
2017-04-10 18:58:08 +02:00
|
|
|
|
|
|
|
// Populate back the payload.
|
|
|
|
r.Body = ioutil.NopCloser(bytes.NewReader(payload))
|
|
|
|
|
2016-03-13 01:08:15 +01:00
|
|
|
// Verify Content-Md5, if payload is set.
|
|
|
|
if r.Header.Get("Content-Md5") != "" {
|
2016-11-21 22:51:05 +01:00
|
|
|
if r.Header.Get("Content-Md5") != getMD5HashBase64(payload) {
|
2016-03-13 01:08:15 +01:00
|
|
|
return ErrBadDigest
|
|
|
|
}
|
|
|
|
}
|
2017-04-10 18:58:08 +02:00
|
|
|
|
2016-07-05 10:04:50 +02:00
|
|
|
if skipContentSha256Cksum(r) {
|
2017-04-10 18:58:08 +02:00
|
|
|
return ErrNone
|
2016-07-01 23:34:40 +02:00
|
|
|
}
|
2017-04-10 18:58:08 +02:00
|
|
|
|
|
|
|
// Verify that X-Amz-Content-Sha256 Header == sha256(payload)
|
|
|
|
// If X-Amz-Content-Sha256 header is not sent then we don't calculate/verify sha256(payload)
|
|
|
|
sum := r.Header.Get("X-Amz-Content-Sha256")
|
|
|
|
if isRequestPresignedSignatureV4(r) {
|
|
|
|
sum = r.URL.Query().Get("X-Amz-Content-Sha256")
|
2016-02-22 02:57:05 +01:00
|
|
|
}
|
2017-04-10 18:58:08 +02:00
|
|
|
if sum != "" && sum != getSHA256Hash(payload) {
|
|
|
|
return ErrContentSHA256Mismatch
|
|
|
|
}
|
|
|
|
return ErrNone
|
2016-02-22 02:57:05 +01:00
|
|
|
}
|
|
|
|
|
2016-07-17 22:23:15 +02:00
|
|
|
// authHandler - handles all the incoming authorization headers and validates them if possible.
|
2016-02-16 02:42:39 +01:00
|
|
|
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}
|
|
|
|
}
|
|
|
|
|
2016-08-09 05:56:29 +02:00
|
|
|
// List of all support S3 auth types.
|
2016-08-16 16:57:14 +02:00
|
|
|
var supportedS3AuthTypes = map[authType]struct{}{
|
|
|
|
authTypeAnonymous: {},
|
|
|
|
authTypePresigned: {},
|
2016-09-30 23:32:13 +02:00
|
|
|
authTypePresignedV2: {},
|
2016-08-16 16:57:14 +02:00
|
|
|
authTypeSigned: {},
|
2016-09-30 23:32:13 +02:00
|
|
|
authTypeSignedV2: {},
|
2016-08-16 16:57:14 +02:00
|
|
|
authTypePostPolicy: {},
|
|
|
|
authTypeStreamingSigned: {},
|
2016-08-09 05:56:29 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
// Validate if the authType is valid and supported.
|
|
|
|
func isSupportedS3AuthType(aType authType) bool {
|
2016-08-16 16:57:14 +02:00
|
|
|
_, ok := supportedS3AuthTypes[aType]
|
|
|
|
return ok
|
2016-08-09 05:56:29 +02:00
|
|
|
}
|
|
|
|
|
2016-02-17 03:50:36 +01:00
|
|
|
// handler for validating incoming authorization headers.
|
2016-02-16 02:42:39 +01:00
|
|
|
func (a authHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
|
2016-08-09 05:56:29 +02:00
|
|
|
aType := getRequestAuthType(r)
|
|
|
|
if isSupportedS3AuthType(aType) {
|
|
|
|
// Let top level caller validate for anonymous and known signed requests.
|
2016-02-17 03:50:36 +01:00
|
|
|
a.handler.ServeHTTP(w, r)
|
|
|
|
return
|
2016-08-09 05:56:29 +02:00
|
|
|
} else if aType == authTypeJWT {
|
accessPolicy: Implement Put, Get, Delete access policy.
This patch implements Get,Put,Delete bucket policies
Supporting - http://docs.aws.amazon.com/AmazonS3/latest/dev/access-policy-language-overview.html
Currently supports following actions.
"*": true,
"s3:*": true,
"s3:GetObject": true,
"s3:ListBucket": true,
"s3:PutObject": true,
"s3:CreateBucket": true,
"s3:GetBucketLocation": true,
"s3:DeleteBucket": true,
"s3:DeleteObject": true,
"s3:AbortMultipartUpload": true,
"s3:ListBucketMultipartUploads": true,
"s3:ListMultipartUploadParts": true,
following conditions for "StringEquals" and "StringNotEquals"
"s3:prefix", "s3:max-keys"
2016-02-04 01:46:56 +01:00
|
|
|
// Validate Authorization header if its valid for JWT request.
|
2016-12-27 17:28:10 +01:00
|
|
|
if !isHTTPRequestValid(r) {
|
2016-02-16 02:42:39 +01:00
|
|
|
w.WriteHeader(http.StatusUnauthorized)
|
|
|
|
return
|
|
|
|
}
|
accessPolicy: Implement Put, Get, Delete access policy.
This patch implements Get,Put,Delete bucket policies
Supporting - http://docs.aws.amazon.com/AmazonS3/latest/dev/access-policy-language-overview.html
Currently supports following actions.
"*": true,
"s3:*": true,
"s3:GetObject": true,
"s3:ListBucket": true,
"s3:PutObject": true,
"s3:CreateBucket": true,
"s3:GetBucketLocation": true,
"s3:DeleteBucket": true,
"s3:DeleteObject": true,
"s3:AbortMultipartUpload": true,
"s3:ListBucketMultipartUploads": true,
"s3:ListMultipartUploadParts": true,
following conditions for "StringEquals" and "StringNotEquals"
"s3:prefix", "s3:max-keys"
2016-02-04 01:46:56 +01:00
|
|
|
a.handler.ServeHTTP(w, r)
|
|
|
|
return
|
2016-02-16 02:42:39 +01:00
|
|
|
}
|
2017-01-06 09:37:00 +01:00
|
|
|
writeErrorResponse(w, ErrSignatureVersionNotSupported, r.URL)
|
2016-02-16 02:42:39 +01:00
|
|
|
}
|