PHP Classes

File: src/Context/Receiver.php

Recommend this page to a friend!
  Classes of Scott Arciszewski   HPKE PHP   src/Context/Receiver.php   Download  
File: src/Context/Receiver.php
Role: Class source
Content type: text/plain
Description: Class source
Class: HPKE PHP
Encrypt and decrypt data using hybrid public keys
Author: By
Last change:
Date: 8 days ago
Size: 720 bytes
 

Contents

Class file image Download
<?php
declare(strict_types=1);
namespace ParagonIE\HPKE\Context;
use ParagonIE\HPKE\Context;
use ParagonIE\HPKE\HPKEException;
use ParagonIE\HPKE\Role;

class Receiver extends Context
{
    const ROLE = Role::Receiver;

    /**
     * @throws HPKEException
     */
    public function open(
        string $ciphertext,
        string $aad = ''
    ): string {
        $Nt = $this->hpke->aead->tagLength();
        $ct = substr($ciphertext, 0, -$Nt);
        $tag = substr($ciphertext, -$Nt, $Nt);
        $pt = $this->hpke->aead->decrypt(
            $this->key,
            $ct,
            $tag,
            $this->computeNonce(),
            $aad
        );
        $this->incrementSeq();
        return $pt;
    }
}