Display Login failure when using External Custom Login Form

Question

I am new to OAM area and really apreciate if some one can guide me in the right direction. I have configured External Custom Login Form (thanks to fusionsecurity blog) with Oracle Access Manager 11g + webgate 10g. If I enter correct user id and password in the below form, then all is good and able to access the protected resoruce.
If I enter incorrect values for loginname/password fields, then the from simply refreshes itself and does not give me any error message. How can display error message when a user enters in correct values for those fields?
<form action="http://hostname:7777/oam/server/auth_cred_submit" method="post">
<fieldset>
<legend>Login Screen</legend>
<label for="username" accesskey="u">User Name:</label>
<input type="text" id="username" name="username" size="15" tabindex="1">
<label for="password" accesskey="p">Password:</label>
<input type="password" id="password" name="password" size="15" tabindex="2">
<input type="hidden" name="login-form-type" value="pwd">
<input class="submit" type="submit" value="Login" tabindex="3">
</fieldset>
</form>
Thanks

Answer 1

Hi!
I have installed Oracle Access Manager 11g + Webgate 11g and not 10g, but I think
it has to work beause login is being processed by OAM (/oam/server/auth_cred_submit);
and it if does not work, it may give you a clue on how to do it.
Having stated that fact, it is very simple to do it: whenever I try to access a protected
resource and I am not authenticated I am redirected to my login page and some
special parameters are passed to it such as: request_id, OAM_REQ, authn_try_count and
some others.
authn_try_count is the magic one as it show the number of login tries, so here is
a code snippet of my login page which uses JSTL for conditional processing.
<form...>
<c:if test="*${param['authn_try_count'] > 0}*">
&lt;span class="error-msg"&gt;
<fmt:message key="login.val.wrong.login"/>
&lt;/span&gt;
</c:if>
</form>
Best regards,
Jesús García from
Mexico city