void getNetbiosName_null() {
        assertNull(ctx.getNetbiosName());
    }

    @Test
    @DisplayName("getSigningKey throws when ExtendedGSSContext not implemented")
    void getSigningKey_notImplementedByGSSContext() {
        SmbException ex = assertThrows(SmbException.class, () -> ctx.getSigningKey());
        assertTrue(ex.getMessage().contains("ExtendedGSSContext is not implemented"));
    }

    @Test

                                        .treeConnect(null, null);
                            } else {
                                final byte[] signingKey = auth.getSigningKey(transport.server.encryptionKey);
                                request.digest = new SigningDigest(signingKey, false);
                            }
                        }

        return serverChallenge;
    }

    /**
     * Gets the signing key for message authentication.
     * @return the signing key bytes
     */
    public byte[] getSigningKey() {
        return signingKey;
    }

    /**
     * Gets the NetBIOS name of the remote server.
     * @return the NetBIOS name
     */
    public String getNetbiosName() {

					fmt.Sprintf(credentialTemplate, accessKey, now.Format(yyyymmdd), globalMinioDefaultRegion),
				},
				"X-Amz-Date": []string{now.Format(iso8601Format)},
				"X-Amz-Signature": []string{
					getSignature(getSigningKey(globalActiveCred.SecretKey, now,
						globalMinioDefaultRegion, serviceS3), "policy"),
				},
				"Policy": []string{"policy"},
			},
			expected: ErrNone,
		},
	}

	// Run each test case individually.

     * @return the server's challenge
     */
    public byte[] getServerChallenge() {
        return this.serverChallenge;
    }

    @Override
    public byte[] getSigningKey() {
        return this.masterKey;
    }

    @Override
    public String getNetbiosName() {
        return this.netbiosName;
    }

    /**

     *
     * @param challenge the server challenge bytes
     * @return the signing key
     * @throws SmbException if an error occurs generating the signing key
     */
    public byte[] getSigningKey(final byte[] challenge) throws SmbException {
        switch (LM_COMPATIBILITY) {
        case 0:
        case 1:
        case 2:
            final byte[] signingKey = new byte[40];

     * @param chlng the server challenge
     * @return the signing key
     * @throws SmbException if an SMB error occurs
     * @throws GeneralSecurityException if a security error occurs
     */
    public byte[] getSigningKey(CIFSContext tc, byte[] chlng) throws SmbException, GeneralSecurityException {
        switch (tc.getConfig().getLanManCompatibility()) {
        case 0:
        case 1:
        case 2:

}

// postPresignSignatureV4 - presigned signature for PostPolicy requests.
func postPresignSignatureV4(policyBase64 string, t time.Time, secretAccessKey, location string) string {
	// Get signining key.
	signingkey := getSigningKey(secretAccessKey, t, location, "s3")
	// Calculate signature.
	signature := getSignature(signingkey, policyBase64)
	return signature
}

	canonicalRequest := getCanonicalRequest(extractedSignedHeaders, unsignedPayload, queryStr, req.URL.Path, req.Method)
	stringToSign := getStringToSign(canonicalRequest, date, scope)
	signingKey := getSigningKey(secretAccessKey, date, region, serviceS3)
	signature := getSignature(signingKey, stringToSign)

	req.URL.RawQuery = query.Encode()

	// Add signature header to RawQuery.