How to Use SHA1 Encryption Instead of BCrypt in Laravel 4?

Using SHA1 Encryption with Laravel 4

To implement SHA1 encryption instead of BCrypt in Laravel 4, you must rewrite the Hash module. Laravel's dependency injection principles make this relatively straightforward.

Step 1: Create the SHAHasher Class

Create a SHAHasher class in app/libraries that implements the IlluminateHashingHasherInterface (or IlluminateContractsHashingHasher in Laravel 5). Implement the three required methods:

<code class="php">class SHAHasher implements Illuminate\Hashing\HasherInterface {

    // Hash a given value
    public function make($value, array $options = array()) {}

    // Verify a given plain value against a hash
    public function check($value, $hashedValue, array $options = array()) {}
    
    // Check if a hash needs to be rehashed
    public function needsRehash($hashedValue, array $options = array()) {}

}</code>

Step 2: Register the SHAHasher Service Provider

Create a SHAHashServiceProvider in app/libraries that extends IlluminateSupportServiceProvider and registers it as the hash component:

<code class="php">class SHAHashServiceProvider extends Illuminate\Support\ServiceProvider {

    // Register the service provider
    public function register() {}

    // Get the services provided by the provider
    public function provides() {}

}</code>

Step 3: Modify the App Configuration

• Open app/config/app.php
• Remove 'IlluminateHashingHashServiceProvider' from the providers array
• Add 'SHAHashServiceProvider' to the providers array

Additional Notes

• This method allows you to switch between BCrypt and SHA1 encryption in Laravel.
• For registration, hash the password using $password = sha1($password).
• In post_login, check the password using $hashed_password === sha1($password) instead of Auth::attempt.

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