mirror of https://github.com/minio/minio.git
134 lines
4.5 KiB
Go
134 lines
4.5 KiB
Go
/*
|
|
* Minio Cloud Storage, (C) 2015, 2016 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/hmac"
|
|
"encoding/hex"
|
|
"github.com/minio/sha256-simd"
|
|
"net/http"
|
|
"regexp"
|
|
"strings"
|
|
"unicode/utf8"
|
|
)
|
|
|
|
// http Header "x-amz-content-sha256" == "UNSIGNED-PAYLOAD" indicates that the
|
|
// client did not calculate sha256 of the payload.
|
|
const unsignedPayload = "UNSIGNED-PAYLOAD"
|
|
|
|
// http Header "x-amz-content-sha256" == "UNSIGNED-PAYLOAD" indicates that the
|
|
// client did not calculate sha256 of the payload. Hence we skip calculating sha256.
|
|
// We also skip calculating sha256 for presigned requests without "x-amz-content-sha256" header.
|
|
func skipContentSha256Cksum(r *http.Request) bool {
|
|
contentSha256 := r.Header.Get("X-Amz-Content-Sha256")
|
|
return isRequestUnsignedPayload(r) || (isRequestPresignedSignatureV4(r) && contentSha256 == "")
|
|
}
|
|
|
|
// isValidRegion - verify if incoming region value is valid with configured Region.
|
|
func isValidRegion(reqRegion string, confRegion string) bool {
|
|
if confRegion == "" || confRegion == "US" {
|
|
confRegion = "us-east-1"
|
|
}
|
|
// Some older s3 clients set region as "US" instead of
|
|
// "us-east-1", handle it.
|
|
if reqRegion == "US" {
|
|
reqRegion = "us-east-1"
|
|
}
|
|
return reqRegion == confRegion
|
|
}
|
|
|
|
// sumHMAC calculate hmac between two input byte array.
|
|
func sumHMAC(key []byte, data []byte) []byte {
|
|
hash := hmac.New(sha256.New, key)
|
|
hash.Write(data)
|
|
return hash.Sum(nil)
|
|
}
|
|
|
|
// Reserved string regexp.
|
|
var reservedNames = regexp.MustCompile("^[a-zA-Z0-9-_.~/]+$")
|
|
|
|
// getURLEncodedName encode the strings from UTF-8 byte representations to HTML hex escape sequences
|
|
//
|
|
// This is necessary since regular url.Parse() and url.Encode() functions do not support UTF-8
|
|
// non english characters cannot be parsed due to the nature in which url.Encode() is written
|
|
//
|
|
// This function on the other hand is a direct replacement for url.Encode() technique to support
|
|
// pretty much every UTF-8 character.
|
|
func getURLEncodedName(name string) string {
|
|
// if object matches reserved string, no need to encode them
|
|
if reservedNames.MatchString(name) {
|
|
return name
|
|
}
|
|
var encodedName string
|
|
for _, s := range name {
|
|
if 'A' <= s && s <= 'Z' || 'a' <= s && s <= 'z' || '0' <= s && s <= '9' { // §2.3 Unreserved characters (mark)
|
|
encodedName = encodedName + string(s)
|
|
continue
|
|
}
|
|
switch s {
|
|
case '-', '_', '.', '~', '/': // §2.3 Unreserved characters (mark)
|
|
encodedName = encodedName + string(s)
|
|
continue
|
|
default:
|
|
len := utf8.RuneLen(s)
|
|
if len < 0 {
|
|
return name
|
|
}
|
|
u := make([]byte, len)
|
|
utf8.EncodeRune(u, s)
|
|
for _, r := range u {
|
|
hex := hex.EncodeToString([]byte{r})
|
|
encodedName = encodedName + "%" + strings.ToUpper(hex)
|
|
}
|
|
}
|
|
}
|
|
return encodedName
|
|
}
|
|
|
|
// extractSignedHeaders extract signed headers from Authorization header
|
|
func extractSignedHeaders(signedHeaders []string, reqHeaders http.Header) http.Header {
|
|
extractedSignedHeaders := make(http.Header)
|
|
for _, header := range signedHeaders {
|
|
val, ok := reqHeaders[http.CanonicalHeaderKey(header)]
|
|
if !ok {
|
|
// Golang http server strips off 'Expect' header, if the
|
|
// client sent this as part of signed headers we need to
|
|
// handle otherwise we would see a signature mismatch.
|
|
// `aws-cli` sets this as part of signed headers.
|
|
//
|
|
// According to
|
|
// http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.20
|
|
// Expect header is always of form:
|
|
//
|
|
// Expect = "Expect" ":" 1#expectation
|
|
// expectation = "100-continue" | expectation-extension
|
|
//
|
|
// So it safe to assume that '100-continue' is what would
|
|
// be sent, for the time being keep this work around.
|
|
// Adding a *TODO* to remove this later when Golang server
|
|
// doesn't filter out the 'Expect' header.
|
|
if header == "expect" {
|
|
extractedSignedHeaders[header] = []string{"100-continue"}
|
|
}
|
|
// If not found continue, we will fail later.
|
|
continue
|
|
}
|
|
extractedSignedHeaders[header] = val
|
|
}
|
|
return extractedSignedHeaders
|
|
}
|