<?php declare(strict_types=1);
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namespace WeChatPay\Crypto;
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use function openssl_encrypt;
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use function base64_encode;
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use function openssl_decrypt;
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use function base64_decode;
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use const OPENSSL_RAW_DATA;
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use UnexpectedValueException;
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/**
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* Aes encrypt/decrypt using `aes-256-ecb` algorithm with pkcs7padding.
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*/
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class AesEcb implements AesInterface
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{
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/**
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* @inheritDoc
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*/
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public static function encrypt(string $plaintext, string $key, string $iv = ''): string
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{
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$ciphertext = openssl_encrypt($plaintext, static::ALGO_AES_256_ECB, $key, OPENSSL_RAW_DATA, $iv = '');
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if (false === $ciphertext) {
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throw new UnexpectedValueException('Encrypting the input $plaintext failed, please checking your $key and $iv whether or nor correct.');
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}
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return base64_encode($ciphertext);
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}
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/**
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* @inheritDoc
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*/
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public static function decrypt(string $ciphertext, string $key, string $iv = ''): string
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{
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$plaintext = openssl_decrypt(base64_decode($ciphertext), static::ALGO_AES_256_ECB, $key, OPENSSL_RAW_DATA, $iv = '');
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if (false === $plaintext) {
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throw new UnexpectedValueException('Decrypting the input $ciphertext failed, please checking your $key and $iv whether or nor correct.');
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}
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return $plaintext;
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}
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}
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