func doesPolicySignatureV4Match(formValues http.Header) (auth.Credentials, APIErrorCode) {
	// Server region.
	region := globalSite.Region()

	// Parse credential tag.
	credHeader, s3Err := parseCredentialHeader("Credential="+formValues.Get(xhttp.AmzCredential), region, serviceS3)
	if s3Err != ErrNone {
		return auth.Credentials{}, s3Err
	}

	r := &http.Request{Header: formValues}

	}{
		{"shastring", "", "shastring"},
		{emptySHA256, "", emptySHA256},
		{"", "", emptySHA256},
		{"", "X-Amz-Credential=random", unsignedPayload},
		{"", "X-Amz-Credential=random&X-Amz-Content-Sha256=" + unsignedPayload, unsignedPayload},
		{"", "X-Amz-Credential=random&X-Amz-Content-Sha256=shastring", "shastring"},
	}

	for i, testCase := range testCases {

			name:                   "test-credential",
			expected: &auth.SdsSecretConfig{
				Name:      credentials.ToResourceName("test-credential"),
				SdsConfig: SDSAdsConfig,
			},
		},
		{
			credentialSocketExists: false,
			name:                   "test-credential-no-prefix-with-socket",
			expected: &auth.SdsSecretConfig{
				Name:      credentials.ToResourceName("test-credential-no-prefix-with-socket"),

	// CredentialNameSocketPath is the well-known path to the Unix Domain Socket for Credential Name.
	CredentialNameSocketPath = "./var/run/secrets/credential-uds/socket"

	// CredentialMetaDataName is the name in node meta data.
	CredentialMetaDataName = "credential"

	// SDSExternalClusterName is the name of the cluster for external SDS connections which is defined via CredentialNameSocketPath

        volumeMounts:
        - mountPath: /var/run/secrets/workload-spiffe-uds
          name: workload-socket
        - mountPath: /var/run/secrets/credential-uds
          name: credential-socket
        - mountPath: /var/run/secrets/workload-spiffe-credentials
          name: workload-certs
        - mountPath: /etc/istio/proxy
          name: istio-envoy
        - mountPath: /etc/istio/config

		}}
		cmd.SysProcAttr.GidMappings = []syscall.SysProcIDMap{{
			ContainerID: int(nobody),
			HostID:      gid,
			Size:        int(1),
		}}

		// Set credentials to run as user and group nobody.
		cmd.SysProcAttr.Credential = &syscall.Credential{
			Uid: nobody,
			Gid: nobody,
		}
	}
	if err := cmd.Run(); err != nil {
		if testenv.SyscallIsNotSupported(err) {
			t.Skipf("skipping: %v: %v", cmd, err)

				CredentialName:    "credential",
				ClientCertificate: "",
				PrivateKey:        "",
				CaCertificates:    "ca",
			},
			valid: false,
		},
		{
			name: "MUTUAL: Credential Name set correctly",
			tls: &networking.ClientTLSSettings{
				Mode:              networking.ClientTLSSettings_MUTUAL,
				CredentialName:    "some credential",
				ClientCertificate: "",

          volumeMounts:
          - name: workload-socket
            mountPath: /var/run/secrets/workload-spiffe-uds
          - name: credential-socket
            mountPath: /var/run/secrets/credential-uds
          - name: workload-certs
            mountPath: /var/run/secrets/workload-spiffe-credentials
          - name: istio-envoy
            mountPath: /etc/istio/proxy
          - name: config-volume

	testCases := []struct {
		inputQueryKey   string
		inputQueryValue string
		expectedResult  bool
	}{
		// Test case - 1.
		// Test case with query key ""X-Amz-Credential" set.
		{"", "", false},
		// Test case - 2.
		{"X-Amz-Credential", "", true},
		// Test case - 3.
		{"X-Amz-Content-Sha256", "", false},
	}

	for i, testCase := range testCases {
		// creating an input HTTP request.

          volumeMounts:
          - name: workload-socket
            mountPath: /var/run/secrets/workload-spiffe-uds
          - name: credential-socket
            mountPath: /var/run/secrets/credential-uds
          - name: workload-certs
            mountPath: /var/run/secrets/workload-spiffe-credentials
          - name: istio-envoy
            mountPath: /etc/istio/proxy
          - name: config-volume