C Language CITI Bank Payment Gateway Linux Server Payment Gateway Integration PHP

How to Integrate CITI Bank Emi Payment Gateway in Linux Server

Today i am writing another simple steps to integrate the CITI Bank PG for advanced PHP Programmer.
The following steps will only work on Linux server as the linux server already have shell scripting enabled. I did not tried the below process on Windows.
I suggest you to first read the docs files sent by Citi Bank team. Although they are having a less technical guys sitting in there team and they can’t provide the program written in PHP not in other languages. They have a simple C program and nothing else. Don’t waste your time in calling them again and again and the output will be negative.

Step 1. Create a folder named citibank (name can be different as per your choice) on your Linux server. The location would be like this “/var/www/html/citibank”
Step 2. Copy the and prog.c or santest.c C program file provided by Citi Bank PG Support team in the folder.
Step 3. Then create a PHP program generate_checksum.php
shell_exec(‘gcc -rdynamic -o prog3 prog3.c -ldl’); // this shell command will create a prog3 compile file that will help to generate the checksum
The above program will create the prog3 executable compile file on your server.
(* As the file will be created in the same citibank directory so the directory must have 0777 read write permission.)
If the executable compile file is not creating then there must be some problem and you can not proceed further without this file. Contact the Network Guy in your team or read the error log to resolve the issue.

Note: If you want to know that shell scripting is enabled on your Linux server is not then run the following php code.
<?php $output = shell_exec(‘ls -lart’); ?>
If the PHP Program shows some output then the shell scripting is enabled on your server.
If not then refer the log file at location “/var/log/httpd/error_log” (As i am using the Apache Server)

Step 4. If everything written above is working in a correct way then you may proceed further with the following PHP program.
Simple create a file form.php on your server and run the program.
function getChecksum($string ,$key)
$checksum_output = shell_exec(“./prog3 $string $key”);
$checksum_output = explode(‘=’,$checksum_output,2);
$checksum = $checksum_output[1];
$generatedChecksum = trim($checksum);
return $generatedChecksum;
$checksum = getChecksum(‘CITI’, ‘9310341016vasim’); // 4 digit and 12 digit
$return_url =’’;
$d_m_y_his = gmdate(‘dmYhis’); // 182652
$merchant_code = ‘44350912’;
$order_no = ‘20811332’; // 20662730
$trace_no = ‘662730’; // 662730
$amount = ‘200.0’;
<FORM name=”frm” action=”” method=”post” >
<INPUT type=”text” size=”200″ NAME=”MalltoCiti” VALUE=”0100|<?php echo $return_url; ?>|1|<?php echo $checksum; ?>|<?php echo $d_m_y_his; ?>|<?php echo $merchant_code; ?>|<?php echo $order_no; ?>|<?php echo $trace_no; ?>|<?php echo $amount; ?>|”>
<input type=”submit” NAME=”Submit” value=”Pay Now”>

The C Program that will be used by above php program is


int main(int argc, char *argv[] )
void *handle;
char temp1[strlen(argv[1])+1];
char temp2[strlen(argv[2])+1];
temp1[strlen(argv[1])+1] = ‘\0’;
temp2[strlen(argv[2])+1] = ‘\0’;

char *str;

char* (*func)(char*,char*);
func=(char* (*)(char*,char*))dlsym(handle,”Transpo”) ;
str=(char*)malloc(sizeof(char) * 20);
str=(char *)((*func)(temp1,temp2));
printf(“STR = %s \n”, str);

According to me everything will work fine and the Citibank url will open successfully.
If there is something that you did not understand then you can Conact me.
Cheers and have fun!

ICICI EMI Payment Gateway JavaBridge Payment Gateway Integration Tomcat Server

How to install JavaBridge and integrate ICICI Payment Gateway

Step by step Procedure to create JavaBridge on Linux and then Integrating ICICI Payment Gateway

I have talked a lot to the ICICI Payment gateway guys in Mumbai. I sent so many mails and followed the complete useless procedure sent by them. Initially I asked for instructions to create JavaBridge in PHP+MySql+Apache+Linux(CentOs) but they were failed to sent me the usefull instructions. As they sent me instructions to create javabridge in Tomcat server so finally we also decided to create the JavaBridge in tomcat server. Then I with my TL (Mr. Anuj Shukla) sat together and worked on the instructions provided by Diadem Tech Weblogs. The instructions provided by him for installing the JavaBridge for Tomcat server + Linux were really helpful.

So here are few necessary and useful step by step instructions to install JavaBridge.

  1. Download the file “” from this link. This link will give you JavaBridge.war and documentation folder once you extract this downloaded file. You can extract using the following Linux command jar xvf JavaBridge.war Copy this JavaBridge.war file to your online Linux server at this location /var/lib/tomcat5/webapps/. We are assuming that you or your technical team already installed the tomcat server on your Linux Operating System.
  2. Then upload the JavaBridge.jar and php-servlet.jar, located under JavaBridge/WEB-INF/lib directory to this location of your server /var/lib/tomcat5/shared/lib/
  3. Once you upload the war file then you must restart the Linux server with the following command. Once you run the command using putty then a JavaBridge folder will be automatically created on the server. Use this Linux command to start the server/etc/init.d/tomcat5 restart (Once you restart the tomcat server and JavaBridge folder is automatically created this means the JavaBridge is installed properly)
  4. Then login to your ICICI merchant admin panel with required login details and download the key file and SFA files ( and extract it on your computer. The file will give you 2 zip files named as and and a file PHP Sfa Guide.pdf
    1. The PHP SFA comes bundled as 2 zip files – – This zip file contains the components, which provide the core SFA functionality and test pages – This zip file contains the components that are required for the SFA to function

    The installation process for is as follows –

    The zip file has the following files

    1)cryptix32.jar – Required by SFA to encrypt the data sent to the ePG

    2)jcert.jar – Required to establish the SSL connection with ePG

    3)jnet.jar – Required to establish the SSL connection with ePG

    4)jsse.jar – Required to establish the SSL connection with ePG

    5)Servlet.jar – HTTP Request/Response handling

    6)Sfa.jar – SFA Java library

1.      Now we need sfa.jar file that can be found under “” file so you need to extract to get the sfa.jar and edit the file with the following entries:











2.      Once you edit the file then put the file in sfa.jar file. You can use jar command Jar -xvf sfa.jar to extract file and once you successfully edited the then you can use jar command Jar -cvf sfa.jar com to zip the file.


3.      Then copy all the 6 jar files (that were extracted from file) including the edited sfa.jar file in /var/lib/tomcat5/common/lib/ folder

JAR Files to copy: cryptix32.jar, jcert.jar, jnet.jar, jsse.jar, servlet.jar, sfa.jar


4.      Then copy the key folder with key files in it to /var/lib/tomcat5/webapps/JavaBridge/ and give it a 777 read and write permission as shown in following image

ICICI EMI Payment Gateway JavaBridge Tomcat Server

Step by Step Procedure to setup JavaBridge on Tomcat Server

As i have recently created the JavaBridge on Tomcat server and then integrated the ICICI Payment gateway so here are few useful steps for advanced programmer to help them in creating the JavaBridge on their online Linux server.
Here are the simple step by step procedure to create JavaBridge.

1. Copy the JavaBridge.war to /var/lib/tomcat5/webapps/ on your Linux server
2. Then upload the JavaBridge.jar and php-servlet.jar to /var/lib/tomcat5/shared/lib/
3. Restart the server using command service httpd restart
4. Make the changes in file and copy it in sfa.jar file.

5. Then copy all the 6 jar files in /var/lib/tomcat5/common/lib/
6. Copy the key folder with key files in it to /var/lib/tomcat5/webapps/JavaBridge/ and set permission 777
7. Create new php.ini file at /var/lib/tomcat5/webapps/JavaBridge/WEB-INF/cgi
8. Upload required php files and Sfa directory provided by ICICI to /var/lib/tomcat5/webapps/JavaBridge after making changes in TestSsl.php and Sfa/PostLibPHP.php
9. Then run the url and see the magic of JavaBridge.

If you find difficulty in any of the steps written above or you are a newbie in PHP then you should refer this link for How to install JavaBridge from the beginning or you can contact me for support.