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v2 signer: correctly sort headers

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The current code determines the header order for the
"string-to-sign" payload by sorting on the concatenation
of headers and values, whereas it should only happen on the
key.

During multipart uploads, since `x-amz-copy-source-range` and
`x-amz-copy-source` headers are present, V2 signatures fail to
validate since header order is swapped.

This patch reverts to the expected behavior.

Signed-off-by: Pierre-Yves Ritschard <pyr@spootnik.org>
This commit is contained in:
Pierre-Yves Ritschard 2016-11-02 17:01:34 +01:00
parent 8234784a1a
commit 775cc6d632
1 changed files with 10 additions and 3 deletions
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13
registry/storage/driver/s3-aws/s3_v2_signer.go
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@ -124,6 +124,8 @@ func (v2 *signer) Sign() error {
md5, ctype, date, xamz string
xamzDate bool
sarray []string
smap map[string]string
sharray []string
)
headers := v2.Request.Header
@ -136,6 +138,7 @@ func (v2 *signer) Sign() error {
v2.Request.Header["Host"] = []string{host}
v2.Request.Header["date"] = []string{v2.Time.In(time.UTC).Format(time.RFC1123)}
smap = make(map[string]string)
for k, v := range headers {
k = strings.ToLower(k)
switch k {
@ -150,16 +153,20 @@ func (v2 *signer) Sign() error {
default:
if strings.HasPrefix(k, "x-amz-") {
vall := strings.Join(v, ",")
sarray = append(sarray, k+":"+vall)
smap[k] = k+":"+vall
if k == "x-amz-date" {
xamzDate = true
date = ""
}
sharray = append(sharray, k)
}
}
}
if len(sarray) > 0 {
sort.StringSlice(sarray).Sort()
if len(sharray) > 0 {
sort.StringSlice(sharray).Sort()
for _, h := range(sharray) {
sarray = append(sarray, smap[h])
}
xamz = strings.Join(sarray, "\n") + "\n"
}