Generate Codeigniter 3 Hmac Key

Posted By admin On 15.12.20
  1. Generate Codeigniter 3 Hmac Key Download
  2. What Is An Hmac
  3. Generate Codeigniter 3 Hmac Key Tool
  4. Hmac Key Size
  5. Generate Codeigniter 3 Hmac Key Password

#CodeIgniter PBKDF2 LibraryPBKDF2 PHP Class Library for CodeIgniter.

PBKDF2 (Password-Based Key Derivation Function) is a key stretching algorithm.It can be used to hash passwords in a computationally intensive manner,so that dictionary and brute-force attacks are less effective.

##HOW TO USE

  1. Find answers to How to Generate HMAC SHA256 in PHP? From the expert community at Experts Exchange.
  2. The Encryption Service provides two-way symmetric (secret key) data encryption. The service will instantiate and/or initialize an encryption handler to suit your parameters as explained below. Encryption Service handlers must implement CodeIgniter’s simple EncrypterInterface. Using an appropriate PHP cryptographic extension or third-party.
  3. 그러나 encryptionkey 는 그대로 사용되지 않습니다. 암호화에 대해 어느 정도 익숙하다면 HMAC에도 비밀 키가 필요하다는 것을 이미 알고 있어야하며 암호화와 인증에 동일한 키를 사용하는 것은 나쁜 습관입니다.
  4. Jun 21, 2009  Upon receiving your request, Amazon S3 will go through the same process to authenticate your request. They use your public key to lookup your private key in their database. They then perform a hash on the data in your request using your private key. They compere the resulting HMAC with the HMAC you supplied in your request. If they match, the request is deemed as authentic!
  5. The first stage of generating our token is creating a key that is unique for each user using the same hashhmac function. This key is generated using the user id and a global secret key constant. This key is then used to generate the final authentication token by combining the previous key and personal information about the user such as the id.
  6. Encryption Key Generator. The all-in-one ultimate online toolbox that generates all kind of keys! Every coder needs All Keys Generator in its favorites!

###1) Customizing the PBKDF2 (optional)

A Time-based One-time Password Algorithm (TOTP) is an algorithm that computes a one-time password from a shared secret key and the current time. It is the cornerstone of Initiative For Open Authentication (OATH) and is used in a number of two factor authentication systems.

The following is a list of all the preferences you can pass to the initialization function to customize PBKDF2 encryption.

PBKDF2 uses SHA-256 by default; If the algorithm does not exist, sha256 will be set.

It is set to 1000 by default, recommended by RFC#2898.

It is set to 32 characters (128-bit) by default.

It is set to 32 characters (128-bit) by default.

####Usage:Example of Initializing the library

###2) Explanation of Encrypt Method

Syntax:

Usage:

Generate Codeigniter 3 Hmac Key Download

  • First

    Return:An associative array with 'salt', 'password', 'hash' keyswhich vaule of 'hash' is concatenation of 'salt' and 'password'.

  • Second

    Return:An object (stdClass) with 'salt', 'password', 'hash' propertieswhich vaule of 'hash' is concatenation of 'salt' and 'password'.

  • Third

    Using $good_hash which has been fetched from database to generate $password hash while $good_hash could be salt or hash (concatenation of salt and password).

    Return:An associative array with 'salt', 'password', 'hash' keyswhich vaule of 'hash' is concatenation of 'salt' and 'password'.

  • Fourth

    Using $good_hash which has been fetched from database to generate $password hash while $good_hash could be salt or hash (concatenation of salt and password).

    Return:An object (stdClass) with 'salt', 'password', 'hash' propertieswhich vaule of 'hash' is concatenation of 'salt' and 'password'.

salt and passwordindexes/properties are 128-bit 16-byte 32-char hash value by default. so hash would be double (256-bit).

###3) Register user

####Step 1:

Load pbkdf2 library into your controller:

####Step 2:

Encrypt user's password sent from login.

Register user by using $pbkdf2['password'] as user's password and storing $pbkdf2['salt'] in seperate column for lateral using /windows-81-pro-product-key-online-generator.html.

OR

Register user by using $pbkdf2['hash'] as user's password which has been recommended; no need to store user's salt seperately.

What Is An Hmac

NOTE: Usernames MUST be unique. be ensured that users aren't able to choose duplicate usernames. make some restrictions on registering users.

Hmac key size

###4) Logging in user

####Step 1:

Load pbkdf2 library into your controller:

Generate Codeigniter 3 Hmac Key Tool

####Step 2:

Fetch user's password using posted username.

Hmac Key Size

Assuming a model named user.php exists, which returns an associative array contains user's password and whatever-you-need from database using posted username.

NOTE: Usernames MUST be unique. be ensured that users aren't able to choose duplicate usernames. make some strictions on registering users.

####Step 3:

Generate Codeigniter 3 Hmac Key Password

Check if the given password is exactly equal to password stored in database.

In the example below, it is assumed that concatenation of salt and password which called hash is used as user's password. the encrypt method select the salt automatically.

NOTE: If you want to store salt in database separately, you MUST pass the salt as second parameter to encrypt method.

License

CodeIgniter PBKDF2 Library was created by Hashem Qolami and released under the MIT License, based on RFC#2898.
Any suggestions are welcome. create an issue if you have any problems/ideas.

Thanks,
-Hashem Qolami <hashem@qolami.com>