Codeigniter Session Encryption Key Generator

Apr 09, 2013 This is the code I use (minus Google Analytics) for the CodeIgniter encryption key generator located at http://jeffreybarke.net/tools/codeigniter-encryption-key. The symmetric encryption classes supplied by the.NET Framework require a key and a new initialization vector (IV) to encrypt and decrypt data. Whenever you create a new instance of one of the managed symmetric cryptographic classes using the parameterless constructor, a new key and IV are automatically created.

ci-encryption-key-generator.php

<?php

/**

* Generate an encryption key for CodeIgniter.

* http://codeigniter.com/user_guide/libraries/encryption.html

// http://www.itnewb.com/v/Generating-Session-IDs-and-Random-Passwords-with-PHP

functiongenerate_token ($len = 32)

{

// Array of potential characters, shuffled.

$chars = array(

'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',

'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',

'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',

'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',

'0', '1', '2', '3', '4', '5', '6', '7', '8', '9'

);

shuffle($chars);

$num_chars = count($chars) - 1;

$token = ';

// Create random token at the specified length.

for ($i = 0; $i < $len; $i++)

{

$token .= $chars[mt_rand(0, $num_chars)];

}

return$token;

}

?><!DOCTYPE html>

<htmllang='en-us' dir='ltr'>

<head>

<metacharset='utf-8'>

<title>CodeIgniter encryption key generator</title>

<metaname='description' content='Generates a random, 32 character string to be used by CodeIgniter’s encryption class.'>

</head>

<body>

</body>

</html>

-->

Fort Knox Passwords - Secure enough for almost anything, like root or administrator passwords. CodeIgniter Encryption Keys - Can be used for any other 256-bit key requirement. 160-bit WPA Key 504-bit WPA Key.
Codeigniter 3.1.0 YOU MUST NOT USE REGULAR TEXT FOR 'encryptionkey' 'The key should be as random as possible and it must not be a regular text string, nor the output of a hashing function, etc. In order to create a proper key, you must use the Encryption library’s createkey method'.

Creating and managing keys is an important part of the cryptographic process. Symmetric algorithms require the creation of a key and an initialization vector (IV). The key must be kept secret from anyone who should not decrypt your data. The IV does not have to be secret, but should be changed for each session. Asymmetric algorithms require the creation of a public key and a private key. The public key can be made public to anyone, while the private key must known only by the party who will decrypt the data encrypted with the public key. This section describes how to generate and manage keys for both symmetric and asymmetric algorithms.

Your encryption key must be as long as the encryption algorithm in use allows. For AES-256, that’s 256 bits or 32 bytes (characters) long. For AES-256, that’s 256 bits or 32 bytes (characters) long. Sep 14, 2019 CodeIgniter-JWT-Sample using CodeIgniter 4. Simple Codeigniter 4, REST Server, JWT implementation. Developers who want to use CodeIgniter 3: Use following command to switch to CodeIgniter 3 branch. Git checkout CI3 Update 1. As per multiple requests, I am adding logic for timeout. Please check application controllers Authtimeout.php for more details.

Where To Find Encryption Key

Symmetric Keys

The symmetric encryption classes supplied by the .NET Framework require a key and a new initialization vector (IV) to encrypt and decrypt data. Whenever you create a new instance of one of the managed symmetric cryptographic classes using the parameterless constructor, a new key and IV are automatically created. Anyone that you allow to decrypt your data must possess the same key and IV and use the same algorithm. Generally, a new key and IV should be created for every session, and neither the key nor IV should be stored for use in a later session.

To communicate a symmetric key and IV to a remote party, you would usually encrypt the symmetric key by using asymmetric encryption. Sending the key across an insecure network without encrypting it is unsafe, because anyone who intercepts the key and IV can then decrypt your data. For more information about exchanging data by using encryption, see Creating a Cryptographic Scheme.

The following example shows the creation of a new instance of the TripleDESCryptoServiceProvider class that implements the TripleDES algorithm.

What is a key problem associated with electrical power generation. When the previous code is executed, a new key and IV are generated and placed in the Key and IV properties, respectively.

Sometimes you might need to generate multiple keys. In this situation, you can create a new instance of a class that implements a symmetric algorithm and then create a new key and IV by calling the GenerateKey and GenerateIV methods. The following code example illustrates how to create new keys and IVs after a new instance of the symmetric cryptographic class has been made.

When the previous code is executed, a key and IV are generated when the new instance of TripleDESCryptoServiceProvider is made. Windows 7 enterprise sp1 key generator. Another key and IV are created when the GenerateKey and GenerateIV methods are called.

Asymmetric Keys

The .NET Framework provides the RSACryptoServiceProvider and DSACryptoServiceProvider classes for asymmetric encryption. These classes create a public/private key pair when you use the parameterless constructor to create a new instance. Asymmetric keys can be either stored for use in multiple sessions or generated for one session only. While the public key can be made generally available, the private key should be closely guarded.

A public/private key pair is generated whenever a new instance of an asymmetric algorithm class is created. After a new instance of the class is created, the key information can be extracted using one of two methods:

The ToXmlString method, which returns an XML representation of the key information.
The ExportParameters method, which returns an RSAParameters structure that holds the key information.

Both methods accept a Boolean value that indicates whether to return only the public key information or to return both the public-key and the private-key information. An RSACryptoServiceProvider class can be initialized to the value of an RSAParameters structure by using the ImportParameters method.