CODEWITHSUNDEEP
phplaravelencryptioncryptography
Aditya Rewari
Aditya Rewari

Reputation: 2687

How to pass IV for CRYPT facade at Laravel in PHP

I am unable to find a method in which I can pass IV(Initialization Vector) to CRYPT facade of Laravel framework in PHP

It appears as if it somehow internally implements it.

If it internally implements this, any way I can get the IV used for a particular encryption ?

$string = 'Some text to be encrypted';
$encrypted = \Illuminate\Support\Facades\Crypt::encrypt($string); // found NO way to pass IV here
$decrypted_string = \Illuminate\Support\Facades\Crypt::decrypt($encrypted);

Upvotes: 0

Views: 713

Answers (1)

James
James

Reputation: 16339

If you source dive the Encrypter you can see how the encyrpt method works:

public function encrypt($value, $serialize = true)
{
    $iv = random_bytes(openssl_cipher_iv_length($this->cipher));

    // ... rest of the method
}

So yes, this is internally implemented.

any way I can get the IV used for a particular encryption ?

Looking at the decrypt method:

public function decrypt($payload, $unserialize = true)
{
    $payload = $this->getJsonPayload($payload);

    $iv = base64_decode($payload['iv']);

    // ... rest of the method
}

So it is possible to get the IV used.

Although you'll have to get this out yourself.

Take a look at the Encrypter to see what's going on; vendor/laravel/framework/src/Illuminate/Encryption/Encrypter.php

Upvotes: 2

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