for _, prefix := range compareKeys {
			if !stringsHasPrefixFold(k, prefix) {
				continue
			}
			found = true
			break
		}
		if found {
			compareMeta1[strings.ToLower(k)] = v
		}
	}

	compareMeta2 := make(map[string]string)
	for k, v := range oi2.Metadata {
		var found bool
		for _, prefix := range compareKeys {
			if !stringsHasPrefixFold(k, prefix) {
				continue
			}

		}
	case crypto.SSEC:
		m[xhttp.AmzServerSideEncryptionCustomerAlgorithm] = xhttp.AmzEncryptionAES
	}

	var toRemove []string
	for k := range cleanMinioInternalMetadataKeys(m) {
		if stringsHasPrefixFold(k, ReservedMetadataPrefixLower) {
			// Do not need to send any internal metadata
			// values to client.
			toRemove = append(toRemove, k)
			continue
		}

	if sc == "" {
		sc = objInfo.StorageClass
	}
	meta[strings.ToLower(xhttp.AmzStorageClass)] = sc

	if rreq.Type == SelectRestoreRequest {
		for _, v := range rreq.OutputLocation.S3.UserMetadata {
			if !stringsHasPrefixFold(v.Name, "x-amz-meta") {
				meta["x-amz-meta-"+v.Name] = v.Value
				continue
			}
			meta[v.Name] = v.Value
		}
		if tags := rreq.OutputLocation.S3.Tagging.String(); tags != "" {

// For example on windows since its case insensitive we are supposed
// to do case insensitive checks.
func HasPrefix(s string, prefix string) bool {
	if runtime.GOOS == globalWindowsOSName {
		return stringsHasPrefixFold(s, prefix)
	}
	return strings.HasPrefix(s, prefix)
}

// HasSuffix - Suffix matcher string matches suffix in a platform specific way.
// For example on windows since its case insensitive we are supposed

		if err != nil {
			writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
			return
		}

		for k, v := range srcInfo.UserDefined {
			if stringsHasPrefixFold(k, ReservedMetadataPrefixLower) {
				encMetadata[k] = v
			}
		}

		if err = rotateKey(ctx, oldKey, newKeyID, newKey, srcBucket, srcObject, encMetadata, kmsCtx); err != nil {