PHP Classes

TA_OpenSSL: Encrypts and decrypts data using certificates

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2003-09-17 (12 years ago) RSS 2.0 feedNot yet rated by the usersTotal: 1,992 All time: 1,881 This week: 1,125Up
Version License Categories  
ta_openssl 1.0GNU General Publi...Networking, Cryptography
Description Author  

This class encrypts and decrypts data using RSA certificates and the openssl extension.

It can verify the resulting data after encrypting to ensure proper recovery.

It supports error handling and localization to present the class messages in different idioms.

Ihis package includes test public and private key files along with instructions on how to create your own key files.

Picture of Ricky Robinson
Name: Ricky Robinson <contact>
Classes: 3 packages by
Country: United States United States
Age: 52
All time rank: 50359 in United States United States
Week rank: 1624 Down166 in United States United States Down

	TA_OpenSSL Encrypts and Decrypts using the PHP OpenSSL extension
	and the RSA Algorithm. The only one php supports as of 4.3.3

        Quick Instructions:
          Download the tar.gz file
          Extract all files to same directory in a web folder
          Navigate to the openssl_test.html page

    Copyright (C) 2003  Terra Access 

    This program is free software; you can redistribute it and/or modify 
    it under the terms of the GNU General Public License as published by 
    the Free Software Foundation; either version 2 of the License, or 
    (at your option) any later version. 

    This program is distributed in the hope that it will be useful, 
    but WITHOUT ANY WARRANTY; without even the implied warranty of 
    GNU General Public License for more details. 

    You should have received a copy of the GNU General Public License 
    along with this program; if not, write to the Free Software 
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
   A quick note:
      I also have a derived class that is able to encrypt large data
      sources. I haven't fully test it yet so I didn't release it here.
      If anyone is interested in obtaining a copy email me at and I will email you a copy.

  * Requires:   OpenSSL Extension Installed and working
  *             PHP 4.1 or higher ( Tested on 4.3.1, 4.1.2, 4.3.3 )
  *             Localization File: english_encrypt.php or translated file
  *             RSA Certificate and Key File
  *							Note: I included a public and private key with this
  *										distribution. The passphrase is 'testing'
  *								Private Key File: privkey_test.pem
  *								Public Key File:  cacert_test.pem
  * Localization Note:
  *   I've also made it compatible with localization. The english version
  *   is in file english_encrypt.php. To use other languages just save the
  *   english_encrypt.php file as [language]_encrypt.php. Translate the defines
  *   to the language of choice and change the require_once at the top of the class page.
  *   If you do we would appreciate it if you emailed us a copy of the new translation.
  *     Thanks <>
  *If you don't want to use the included keys...
  * Creating a Private Key:
  *   openssl genrsa -des3 -out privkey.pem 2048
  *   Note: this was taken straight from
  *         to create a key file without a passphrase remove the -des3 param
  *   Key Size: In the above example the key size is 2048 bits. The size of your data
  *         to encrypt is limited by this number. You can only encrypt data of the
  *         length:
  *               bytes - 11
  *               2048 bits / 8 bits per byte = 256 bytes
  *               256 - 11 = 245 byte Maximum size of data to encrypt
  * Creating a Certificate (Public Key):
  *   openssl req -new -x509 -key privkey.pem -out cacert.pem -days 1095
  *   Note: this was taken straight from
  	You should keep your private key just that private. If you use a passphrase
  	when creating your private key noone can retrieve your data using the 
  	private key without the proper passphrase. I am open to suggestions from
  	anyone on the most reliable way to accomplish this.
  Steps to Using Class:
  1. Include the class file in your source
  2. Create an instance of the class 
  3. Set the public key path
  4. Set the private key path
  5. Set the passphrase ( set to "" if passphrase not used in key generation)
  6. To Encrypt:
  		a. Call encrypt_data_public() to encrypt
  		b. Call get_encrypted_data() to retrieve data
  7. To Decrypt:
  	 	a. Call decrypt_data_private
  	 	b. Call get_decrypted_data() to retrieve data
  See openssl_test.php for commented example
    This is the example code that I used to write this class.
    I retrieved it from the following page...
			//STEP 1: Encryption with Public Key (you will need Private Key to decrypt - see step2)
			$string="Some Important Data";
			$fp=fopen ("cert.pem","r");
			$pub_key=fread ($fp,8192);
			if (!$PK) {
			    echo "Cannot get public key";
			if (!empty($finaltext)) {
			    echo "Encryption OK!";
			    echo "Cannot Encrypt";
			// STEP 2: Decription (Using Private Key)
			$fp=fopen ("pk.pem","r");
			$priv_key2=fread ($fp,8192);
			if (!$Crypted) {
			    $MSG.="<p class='error'>Cannot Decrypt ($CCID).</p>";
			    echo "Decrypted Data: " . $Decrypted;
  Files folder image Files  
File Role Description
Accessible without login Plain text file cacert_test.pem Data Test Public Key File
Accessible without login Plain text file english_encrypt.php Aux. English Localization Translation
Accessible without login HTML file openssl_test.html Example Test HTML Submission Form
Accessible without login Plain text file openssl_test.php Example Test PHP CGI Script
Accessible without login HTML file openssl_test_header.html Data output header
Accessible without login Plain text file privkey_test.pem Data Test Private Key File
Accessible without login Plain text file README_ENCRYPT.txt Doc. Documentation File
Plain text file Class Encrypts and Decrypts data using the OpenSSL extension

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