}

// New returns a single-key KMS that derives new DEKs from the
// given key.
func New(keyID string, key []byte) (KMS, error) {
	if len(key) != 32 {
		return nil, errors.New("kms: invalid key length " + strconv.Itoa(len(key)))
	}
	return secretKey{
		keyID: keyID,
		key:   key,
	}, nil
}

// secretKey is a KMS implementation that derives new DEKs
// from a single key.
type secretKey struct {

		b.fill() // buffer is not full
	}

	// Handle last byte, if any.
	if i := len(line) - 1; i >= 0 {
		b.lastByte = int(line[i])
		b.lastRuneSize = -1
	}

	return
}

// ReadLine is a low-level line-reading primitive. Most callers should use
// [Reader.ReadBytes]('\n') or [Reader.ReadString]('\n') instead or use a [Scanner].
//
// ReadLine tries to return a single line, not including the end-of-line bytes.

	IdleSpeed    = "idle_speed"
	EnvIdleSpeed = "MINIO_SCANNER_IDLE_SPEED"

	ExcessVersions    = "alert_excess_versions"
	EnvExcessVersions = "MINIO_SCANNER_ALERT_EXCESS_VERSIONS"

	ExcessFolders    = "alert_excess_folders"
	EnvExcessFolders = "MINIO_SCANNER_ALERT_EXCESS_FOLDERS"

	// All below are deprecated in October 2022 and
	// replaced them with a single speed parameter
	Delay            = "delay"

	}

	meta, err := loadBucketMetadataParse(ctx, objAPI, bucket, parse)
	if err != nil {
		if !globalIsErasure && !globalIsDistErasure && errors.Is(err, errVolumeNotFound) {
			// Only single drive mode needs this fallback.
			meta = newBucketMetadata(bucket)
		} else {
			return updatedAt, err
		}
	}
	updatedAt = UTCNow()
	switch configFile {
	case bucketPolicyConfig:

		arm64SpecialOperand = map[string]arm64.SpecialOperand{}
		for opd := arm64.SPOP_BEGIN; opd < arm64.SPOP_END; opd++ {
			arm64SpecialOperand[opd.String()] = opd
		}

		// Handle some special cases.
		specialMapping := map[string]arm64.SpecialOperand{
			// The internal representation of CS(CC) and HS(LO) are the same.
			"CS": arm64.SPOP_HS,
			"CC": arm64.SPOP_LO,
		}

		auth = NoAuthMiddleware
	}
	metricsRouter.Handle(prometheusMetricsPathLegacy, auth(metricsHandler()))
	metricsRouter.Handle(prometheusMetricsV2ClusterPath, auth(metricsServerHandler()))
	metricsRouter.Handle(prometheusMetricsV2BucketPath, auth(metricsBucketHandler()))
	metricsRouter.Handle(prometheusMetricsV2NodePath, auth(metricsNodeHandler()))
	metricsRouter.Handle(prometheusMetricsV2ResourcePath, auth(metricsResourceHandler()))

	)

	ErrInvalidEndpoint = newErrFn(
		"Invalid endpoint for single drive mode",
		"Please check the endpoint",
		`Single-Node modes requires absolute path without hostnames:
Examples:
   $ minio server /data/minio/ #Single Node Single Drive
   $ minio server /data-{1...4}/minio # Single Node Multi Drive`,
	)

	ErrUnsupportedBackend = newErrFn(
		"Unable to write to the backend",

			return FileInfoVersions{}, err
		}
		versions, err = xlMeta.ListVersions(volume, path, allParts)
	}
	if err == nil && len(versions) == 0 {
		// This special case is needed to handle len(xlMeta.versions) == 0
		versions = []FileInfo{
			{
				Volume:   volume,
				Name:     path,
				Deleted:  true,
				IsLatest: true,
				ModTime:  timeSentinel1970,
			},
		}
	}
	if err != nil {

	defer cancel()

	adminTestBed, err := prepareAdminErasureTestBed(ctx)
	if err != nil {
		t.Fatal("Failed to initialize a single node Erasure backend for admin handler tests.", err)
	}
	defer adminTestBed.TearDown()

	// Initialize admin peers to make admin RPC calls. Note: In a
	// single node setup, this degenerates to a simple function
	// call under the hood.
	globalMinioAddr = "127.0.0.1:9000"

	AuditWebhookSubSys,
	AuditKafkaSubSys,
	StorageClassSubSys,
	CacheSubSys,
	ILMSubSys,
	BatchSubSys,
	BrowserSubSys,
)

// SubSystemsSingleTargets - subsystems which only support single target.
var SubSystemsSingleTargets = set.CreateStringSet(
	SiteSubSys,
	RegionSubSys,
	EtcdSubSys,
	CacheSubSys,
	APISubSys,
	StorageClassSubSys,
	CompressionSubSys,
	PolicyOPASubSys,