}

// doesPresignV2SignatureMatch - Verify query headers with presigned signature
//   - http://docs.aws.amazon.com/AmazonS3/latest/dev/RESTAuthentication.html#RESTAuthenticationQueryStringAuth
//
// returns ErrNone if matches. S3 errors otherwise.
func doesPresignV2SignatureMatch(r *http.Request) APIErrorCode {
	// r.RequestURI will have raw encoded URI as sent by the client.
	tokens := strings.SplitN(r.RequestURI, "?", 2)

// than 16 MiB. We must not accept arbitrary large chunks.
// One 16 MiB is a reasonable max limit.
//
// Then we read the signature and payload data. We compute the SHA256 checksum
// of the payload and verify that it matches the expected signature value.
//
// The last chunk is *always* 0-sized. So, we must only return io.EOF if we have encountered
// a chunk with a chunk size = 0. However, this chunk still has a signature and we must

func fixLongPath(path string) string {
	// Do nothing (and don't allocate) if the path is "short".
	// Empirically (at least on the Windows Server 2013 builder),
	// the kernel is arbitrarily okay with < 248 bytes. That
	// matches what the docs above say:
	// "When using an API to create a directory, the specified
	// path cannot be so long that you cannot append an 8.3 file
	// name (that is, the directory name cannot exceed MAX_PATH

	retStr := "{"
	retStr = retStr + expirationStr + ","
	retStr += conditionStr
	retStr += "}"

	return []byte(retStr)
}

// newPostPolicyBytesV4 - creates a bare bones postpolicy string with key and bucket matches.
func newPostPolicyBytesV4(credential, bucketName, objectKey string, expiration time.Time) []byte {
	t := UTCNow()
	// Add the expiration date.

func (e metaCacheEntry) hasPrefix(s string) bool {
	return strings.HasPrefix(e.name, s)
}

// matches returns if the entries have the same versions.
// If strict is false we allow signatures to mismatch.
func (e *metaCacheEntry) matches(other *metaCacheEntry, strict bool) (prefer *metaCacheEntry, matches bool) {
	if e == nil && other == nil {
		return nil, true
	}
	if e == nil {
		return other, false
	}

func (fi FileInfo) ReadQuorum(dquorum int) int {
	if fi.Deleted {
		return dquorum
	}
	return fi.Erasure.DataBlocks
}

// Equals checks if fi(FileInfo) matches ofi(FileInfo)
func (fi FileInfo) Equals(ofi FileInfo) (ok bool) {
	typ1, ok1 := crypto.IsEncrypted(fi.Metadata)
	typ2, ok2 := crypto.IsEncrypted(ofi.Metadata)
	if ok1 != ok2 {
		return false
	}

                "value": 80
              }
            ]
          },
          "unit": "none"
        },
        "overrides": [
          {
            "__systemRef": "hideSeriesFrom",
            "matcher": {
              "id": "byNames",
              "options": {
                "mode": "exclude",
                "names": [
                  "[play.min.io:9000:/disk4/data]"
                ],

	deadline := UTCNow().Add(leakDetectDeadline * time.Second)
	for {
		// get sack snapshot of relevant go routines.
		leaked := initialSnapShot.CompareCurrentSnapshot()
		// current stack snapshot matches the initial one, no leaks, return.
		if len(leaked) == 0 {
			return
		}
		// wait a test again will deadline.
		if UTCNow().Before(deadline) {
			time.Sleep(leakDetectPauseTimeMs * time.Millisecond)
			continue

- Client sends HTTP `POST` request over a TLS connection hitting the MinIO TLS STS API.
- MinIO verifies that the client certificate is valid.
- MinIO tries to find a policy that matches the `CN` of the client certificate.
- MinIO returns temp. S3 credentials associated to the found policy.

		}

		// Do the same for the headers.
		for key, value := range testCase.headers {
			req.Header.Set(key, value)
		}

		// parse form.
		req.ParseForm()

		// Check if it matches!
		err := doesPresignedSignatureMatch(payloadSHA256, req, testCase.region, serviceS3)
		if err != testCase.expected {
			t.Errorf("(%d) expected to get %s, instead got %s", i, niceError(testCase.expected), niceError(err))
		}