if sessionPolicyFile != "" {
		var policy string
		if f, err := os.Open(sessionPolicyFile); err != nil {
			log.Fatalf("Unable to open session policy file: %v", err)
		} else {
			defer f.Close()
			bs, err := io.ReadAll(f)
			if err != nil {
				log.Fatalf("Error reading session policy file: %v", err)
			}
			policy = string(bs)
		}
		stsOpts.Policy = policy
	}
	if expiryDuration != 0 {

			// Reject malformed/malicious requests.
			return false
		}
		// The parent claim in the session token should be equal
		// to the parent detected in the backend
		if parentInClaim != parentUser {
			return false
		}
	} else {
		// This is needed so a malicious user cannot
		// use a leaked session key of another user
		// to widen its privileges.
		return false
	}

// The recycler should handle nil pointers.
type Recycler interface {
	Recycle()
}

// MSS is a map[string]string that can be serialized.
// It is not very efficient, but it is only used for easy parameter passing.
type MSS map[string]string

// Get returns the value for the given key.
func (m *MSS) Get(key string) string {
	if m == nil {
		return ""
	}
	return (*m)[key]
}

// Set a key, value pair.

		writeCustomErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrInternalError), err.Error(), r.URL)
		return
	}
	writeSuccessResponseJSON(w, p)
}

// KMSAssignPolicyHandler - POST /minio/kms/v1/policy/assign?policy=<policy>
func (a kmsAPIHandlers) KMSAssignPolicyHandler(w http.ResponseWriter, r *http.Request) {
	ctx := newContext(r, w, "KMSAssignPolicy")
	defer logger.AuditLog(ctx, w, r, mustGetClaimsFromToken(r))

			return nil, errAuthentication
		}
	}

	// If AuthZPlugin is set, return without any further checks.
	if newGlobalAuthZPluginFn() != nil {
		return claims.Map(), nil
	}

	// Check if a session policy is set. If so, decode it here.
	sp, spok := claims.Lookup(policy.SessionPolicyName)
	if spok {
		// Looks like subpolicy is set and is a string, if set then its

		index := index
		g.Go(func() error {
			if disks[index] == nil {
				return errDiskNotFound
			}

			// Pick one FileInfo for a disk at index.
			fi := metadata[index]
			// Assign index when index is initialized
			if fi.Erasure.Index == 0 {
				fi.Erasure.Index = index + 1
			}

			if !fi.IsValid() {
				return errFileCorrupt
			}

	// 3.1 Validate that the client from STS creds cannot upload any object as
	// it is denied by the plugin.
	c.mustNotUpload(ctx, s.getUserClient(c, cr.AccessKey, cr.SecretKey, ""), bucket)

	// Check that session policies do not apply - as policy enforcement is
	// delegated to plugin.
	{
		svcAK, svcSK := mustGenerateCredentials(c)

		// This policy does not allow listing objects.

var errInvalidMaxParts = errors.New("Part number is greater than the maximum allowed 10000 parts")

// error returned for session policies > 2048

	EnvRootDiskThresholdSize      = "MINIO_ROOTDISK_THRESHOLD_SIZE" // Deprecated Sep 2023
	EnvBrowserLoginAnimation      = "MINIO_BROWSER_LOGIN_ANIMATION"
	EnvBrowserSessionDuration     = "MINIO_BROWSER_SESSION_DURATION" // Deprecated after November 2023
	EnvMinioStsDuration           = "MINIO_STS_DURATION"
	EnvMinIOLogQueryURL           = "MINIO_LOG_QUERY_URL"
	EnvMinIOLogQueryAuthToken     = "MINIO_LOG_QUERY_AUTH_TOKEN"

// `traceHdrsS3HFlag`, otherwise both headers and body will be traced, causing
// high memory usage!
func s3APIMiddleware(f http.HandlerFunc, flags ...s3HFlag) http.HandlerFunc {
	// Collect all flags with bitwise-OR and assign operator
	var handlerFlags s3HFlag
	for _, flag := range flags {
		handlerFlags |= flag
	}

	// Get name of the handler using reflection.
	handlerName := getHandlerName(f, "objectAPIHandlers")