How to use DLL in JSP?

          Hello, all,
          I wrote a program to check the user authentication by call Windows's cryptography
          functions. I have generated a DLL file,
          and have put it in the C:\bea\jdk131_03\jre\bin. But my jsp
          page seems ignoring the java code to call the function in the
          DLL. I am not sure what should be imported at the head of the
          jsp file. Would somebody kindly help me out? Thanks a lot!!!
          My jsp code is here:
          <%@ page import="java.sql.Connection"%>
          <html>
          <head>
          <title>
          Jsp1
          </title>
          </head>
          <body>
          <h1>
          JBuilder Generated JSP
          </h1>
          <%
          try{
          if(Ntauth.authenticate("gecorg", "almond", "1025"))
          out.println("Valid user credenticals");
          else
          out.println("Invalid user credenticals");
          }catch(Exception e)
          out.println(e);
          %>
          </body>
          </html>

          One of my friend helped me to generate a new dll,
          just changed the package name. Then it works. I don't
          know why. But anyway, it works. Thanks everybody for
          your attention.
          "Sylvie" <[email protected]> wrote:
          >
          >Sorry, I found the function names are not match in my previou
          >post. The name is too long. I missed to type "authenticateNTUser" as
          >"authenticateUser"
          >in the SimpleNTAuthentication.java. I have fixed it. I repost them in
          >the following.
          >So the function name in the .h also corrected. But I still get the same
          >error.
          >
          >Do you know what's wrong?
          >
          >
          >"Sylvie" <[email protected]> wrote:
          >>
          >>Hi, Ann,
          >>
          >>Thanks for replying! But I have checked the function names.
          >>They looks the same. I post the code here, would please have
          >>a look.
          >>
          >>Thanks a lot,
          >>Sylvie
          >>---------------------------------------------------------
          >>SimpleNTAuthentication.java
          >>
          >>package Infolenz.Authentication;
          >>
          >>public class SimpleNTAuthentication {
          >>
          >> static {
          >> System.loadLibrary("ntauth");
          >> }
          >>
          >>
          >> private static native boolean authenticateNTUser(
          >> String domainName, // string that specifies the domain
          >> String userId, // string that specifies the user name
          >> String password // string that specifies the password
          >> );
          >> public static boolean authenticate(String domainName, String userId,
          >>String
          >>password)
          >> {
          >>
          >> if (domainName == null || userId == null || password == null)
          >> return false;
          >> else
          >> return authenticateNTUser(domainName, userId, password);
          >>
          >> }
          >>
          >>
          >>}
          >>---------------------------------------------------------
          >>javah generated Infolenz_Authentication_SimpleNTAuthentication.h
          >
          >/* DO NOT EDIT THIS FILE - it is machine generated */
          >#include <jni.h>
          >/* Header for class Infolenz_Authentication_SimpleNTAuthentication */
          >
          >#ifndef IncludedInfolenz_Authentication_SimpleNTAuthentication
          >#define IncludedInfolenz_Authentication_SimpleNTAuthentication
          >#ifdef __cplusplus
          >extern "C" {
          >#endif
          >/*
          > * Class: Infolenz_Authentication_SimpleNTAuthentication
          > * Method: authenticateNTUser
          > * Signature: (Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)Z
          > */
          >JNIEXPORT jboolean JNICALL Java_Infolenz_Authentication_SimpleNTAuthentication_authenticateNTUser
          > (JNIEnv *, jclass, jstring, jstring, jstring);
          >
          >#ifdef __cplusplus
          >}
          >#endif
          >#endif
          >
          >>----------------------------------------------------------------
          >>ntauth.cpp
          >>
          >>#include "Infolenz_Authentication_SimpleNTAuthentication.h" // native
          >>library
          >>included
          >>#include "stdio.h" // standard input and output
          >>#include "afxwin.h" // MFC core and standard components
          >>#include "jni.h"
          >>
          >>JNIEXPORT jboolean JNICALL
          >> Java_Infolenz_Authentication_SimpleNTAuthentication_authenticateNTUser
          >> (JNIEnv *env,
          >> jclass javaClass,
          >> jstring jDomainName,
          >> jstring jUserId,
          >> jstring jPassword )
          >>{
          >> jboolean authenticated;
          >> HANDLE hToken;
          >>
          >>
          >> // get the provided domain name, user id and password
          >> const char *cDomainName = env->GetStringUTFChars(jDomainName, 0);
          >> const char *cUserId = env->GetStringUTFChars(jUserId, 0);
          >> const char *cPassword = env->GetStringUTFChars(jPassword, 0);
          >>
          >>
          >> // Copy the char array to temporary variables to be
          >> // passed to LogonUser. This copy is done to guarantee the
          >> // const nature of the jstring char array.
          >> // Inappropriate access to this data can crash the VM!
          >> char *domainName = new char[env->GetStringUTFLength(jDomainName)
          >+
          >>1];
          >> char *userId = new char[env->GetStringUTFLength(jUserId) + 1];
          >> char *password = new char[env->GetStringUTFLength(jPassword) + 1];
          >>
          >> strcpy(domainName, cDomainName);
          >> strcpy(userId, cUserId);
          >> strcpy(password, cPassword);
          >>
          >> // release the chars back to the VM
          >> env->ReleaseStringUTFChars(jDomainName, cDomainName);
          >> env->ReleaseStringUTFChars(jUserId, cUserId);
          >> env->ReleaseStringUTFChars(jPassword, cPassword);
          >>
          >> // try to authenticate
          >> if (LogonUser( userId,
          >> domainName,
          >> password,
          >> LOGON32_LOGON_NETWORK,
          >> LOGON32_PROVIDER_DEFAULT,
          >> &hToken))
          >>
          >> authenticated = JNI_TRUE;
          >> else
          >> authenticated = JNI_FALSE;
          >>
          >> // delete the memory that was allocated
          >> delete domainName;
          >> delete userId;
          >> delete password;
          >>
          >> // close the handle created by LogonUser
          >> CloseHandle(hToken);
          >>
          >> return authenticated;
          >>}
          >>
          >>-------------------------------------------------------------
          >>
          >>Ann Cao <[email protected]> wrote:
          >>>Are you using JNI? There are two problems that could cause Unsatisfied
          >>>link errors. One is the DLL not found, and the other is that the DLL
          >>>is
          >>>found but is unreadable or the specific function cannot be found in
          >>it.
          >>>Since you have set your path correctly, I guess the reason you got
          >the
          >>>error is the second cause.
          >>>
          >>>Sylvie wrote:
          >>>
          >>>> I wrote a test java program to call the authenticate function.
          >>>> but get a Unsatisfied Link Error. It seems that my program
          >>>> has problem to load the DLL. But I have set the path to include
          >>>> the directory containing the DLL. Dose somebody know what is going
          >>>on?
          >>>>
          >>>> Thanks,
          >>>> Sylvie
          >>>>
          >>>> "Sylvie" <[email protected]> wrote:
          >>>> >
          >>>> >Hello, all,
          >>>> >
          >>>> >I wrote a program to check the user authentication by call Windows's
          >>>> >cryptography
          >>>> >functions. I have generated a DLL file,
          >>>> >and have put it in the C:\bea\jdk131_03\jre\bin. But my jsp
          >>>> >page seems ignoring the java code to call the function in the
          >>>> >DLL. I am not sure what should be imported at the head of the
          >>>> >jsp file. Would somebody kindly help me out? Thanks a lot!!!
          >>>> >My jsp code is here:
          >>>> >
          >>>> ><%@ page import="java.sql.Connection"%>
          >>>> >
          >>>> ><html>
          >>>> ><head>
          >>>> ><title>
          >>>> >Jsp1
          >>>> ></title>
          >>>> ></head>
          >>>> >
          >>>> ><body>
          >>>> ><h1>
          >>>> >JBuilder Generated JSP
          >>>> ></h1>
          >>>> ><%
          >>>> > try{
          >>>> > if(Ntauth.authenticate("gecorg", "almond", "1025"))
          >>>> > out.println("Valid user credenticals");
          >>>> > else
          >>>> > out.println("Invalid user credenticals");
          >>>> > }catch(Exception e)
          >>>> > {
          >>>> > out.println(e);
          >>>> > }
          >>>> > %>
          >>>> >
          >>>> >
          >>>> ></body>
          >>>> ></html>
          >>>> >
          >>>
          >>>--
          >>>Regards,
          >>>Ann
          >>>Developer Relations Engineer
          >>>BEA Support
          >>>
          >>>
          >>
          >

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