public String generateAuthResponse()

in httpclient5-win/src/main/java/org/apache/hc/client5/http/impl/win/WindowsNegotiateScheme.java [172:222]
46 lines of code
9 McCabe index (conditional complexity)

    public String generateAuthResponse(
            final HttpHost host,
            final HttpRequest request,
            final HttpContext context) throws AuthenticationException {

        final HttpClientContext clientContext = HttpClientContext.adapt(context);
        final String response;
        if (clientCred == null) {
            // client credentials handle
            try {
                final String username = getCurrentUsername();
                final TimeStamp lifetime = new TimeStamp();

                clientCred = new CredHandle();
                final int rc = Secur32.INSTANCE.AcquireCredentialsHandle(username,
                        schemeName, Sspi.SECPKG_CRED_OUTBOUND, null, null, null, null,
                        clientCred, lifetime);

                if (WinError.SEC_E_OK != rc) {
                    throw new Win32Exception(rc);
                }

                final String targetName = getServicePrincipalName(request, clientContext);
                response = getToken(null, null, targetName);
            } catch (final RuntimeException ex) {
                failAuthCleanup();
                if (ex instanceof Win32Exception) {
                    throw new AuthenticationException("Authentication Failed", ex);
                }
                throw ex;
            }
        } else if (challenge == null || challenge.isEmpty()) {
            failAuthCleanup();
            throw new AuthenticationException("Authentication Failed");
        } else {
            try {
                final byte[] continueTokenBytes = Base64.decodeBase64(challenge);
                final SecBufferDesc continueTokenBuffer = new ManagedSecBufferDesc(
                                Sspi.SECBUFFER_TOKEN, continueTokenBytes);
                final String targetName = getServicePrincipalName(request, clientContext);
                response = getToken(this.sspiContext, continueTokenBuffer, targetName);
            } catch (final RuntimeException ex) {
                failAuthCleanup();
                if (ex instanceof Win32Exception) {
                    throw new AuthenticationException("Authentication Failed", ex);
                }
                throw ex;
            }
        }
        return schemeName + " " + response;
    }