return false
	}
	signature2, err := base64.StdEncoding.DecodeString(sig2)
	if err != nil {
		return false
	}
	return subtle.ConstantTimeCompare(signature1, signature2) == 1
}

// Return canonical headers.
func canonicalizedAmzHeadersV2(headers http.Header) string {
	var keys []string
	keyval := make(map[string]string, len(headers))
	for key := range headers {
		lkey := strings.ToLower(key)

		len(revWebhookCollisions) > 0 && opts.Tag != DefaultRevisionName {
		return "", fmt.Errorf("cannot create revision tag %q: found existing control plane revision with same name", opts.Tag)
	}

	// find canonical revision webhook to base our tag webhook off of
	revWebhooks, err := GetWebhooksWithRevision(ctx, client.Kube(), opts.Revision)
	if err != nil {
		return "", err
	}
	if len(revWebhooks) == 0 {

		return cred, "", "", time.Time{}, ErrMalformedDate
	}

	// Query string.
	queryStr := req.Form.Encode()

	// Get canonical request.
	canonicalRequest := getCanonicalRequest(extractedSignedHeaders, payload, queryStr, req.URL.Path, req.Method)

	// Get string to sign from canonical request.
	stringToSign := getStringToSign(canonicalRequest, date, signV4Values.Credential.getScope())

	// Get hmac signing key.

		// deployment has asked MinIO to allow for
		// such broken clients and content-length > 0.
		return r.ContentLength > 0 && !globalServerCtxt.StrictS3Compat
	}
	return false
}

// Returns SHA256 for calculating canonical-request.
func getContentSha256Cksum(r *http.Request, stype serviceType) string {
	if stype == serviceSTS {
		payload, err := io.ReadAll(io.LimitReader(r.Body, stsRequestBodyLimit))
		if err != nil {

		encryptedKey bytes.Buffer
	)
	mac := hmac.New(sha256.New, extKey)
	mac.Write(iv[:])
	mac.Write([]byte(domain))
	mac.Write([]byte(SealAlgorithm))
	mac.Write([]byte(path.Join(bucket, object))) // use path.Join for canonical 'bucket/object'
	mac.Sum(sealingKey[:0])
	if n, err := sio.Encrypt(&encryptedKey, bytes.NewReader(key[:]), sio.Config{Key: sealingKey[:], CipherSuites: fips.DARECiphers()}); n != 64 || err != nil {

	md := meshConfig.DefaultConfig.ProxyMetadata
	if md == nil {
		md = map[string]string{}
		meshConfig.DefaultConfig.ProxyMetadata = md
	}
	md["CANONICAL_SERVICE"], md["CANONICAL_REVISION"] = labels.CanonicalService(lbls, wg.Name)
	md["POD_NAMESPACE"] = wg.Namespace
	md["SERVICE_ACCOUNT"] = we.ServiceAccount
	md["TRUST_DOMAIN"] = meshConfig.TrustDomain

		return ErrInvalidToken
	}

	// Verify finally if signature is same.

	// Get canonical request.
	presignedCanonicalReq := getCanonicalRequest(extractedSignedHeaders, hashedPayload, encodedQuery, req.URL.Path, req.Method)

	// Get string to sign from canonical request.
	presignedStringToSign := getStringToSign(presignedCanonicalReq, t, pSignValues.Credential.getScope())

spec:
  replicas: 1
`
	validIstioCanonical = `
apiVersion: v1
kind: Deployment
metadata:
  name: helloworld-v1
  labels:
    service.istio.io/canonical-name: helloworld
    service.istio.io/canonical-revision: v1
spec:
  replicas: 1
`
)

func fromYAML(in string) *unstructured.Unstructured {
	var un unstructured.Unstructured

// generated DEK such that the same context must be
// provided when decrypting an encrypted DEK.
type Context map[string]string

// MarshalText returns a canonical text representation of
// the Context.

// MarshalText sorts the context keys and writes the sorted
// key-value pairs as canonical JSON object. The sort order
// is based on the un-escaped keys. It never returns an error.
func (c Context) MarshalText() ([]byte, error) {
	if len(c) == 0 {

	canonicalHeaders := buf.String()

	// Get signed headers.
	signedHeaders := strings.Join(headers, ";")

	// Get canonical query string.
	req.URL.RawQuery = strings.ReplaceAll(req.URL.Query().Encode(), "+", "%20")

	// Get canonical URI.
	canonicalURI := s3utils.EncodePath(req.URL.Path)

	// Get canonical request.
	// canonicalRequest =
	//  <HTTPMethod>\n
	//  <CanonicalURI>\n
	//  <CanonicalQueryString>\n