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: / proc / self / root / opt / psa / admin / plib / modules / wp-toolkit / vendor / lcobucci / jwt / src / Signer /
Filename : OpenSSL.php
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<?php

declare (strict_types=1);
namespace WPToolkitDependenciesIsolationPrefix\Lcobucci\JWT\Signer;

use WPToolkitDependenciesIsolationPrefix\Lcobucci\JWT\Signer;
use OpenSSLAsymmetricKey;
use function array_key_exists;
use function assert;
use function is_array;
use function is_bool;
use function is_string;
use function openssl_error_string;
use function openssl_free_key;
use function openssl_pkey_get_details;
use function openssl_pkey_get_private;
use function openssl_pkey_get_public;
use function openssl_sign;
use function openssl_verify;
abstract class OpenSSL implements Signer
{
    /**
     * @throws CannotSignPayload
     * @throws InvalidKeyProvided
     */
    protected final function createSignature(string $pem, string $passphrase, string $payload) : string
    {
        $key = $this->getPrivateKey($pem, $passphrase);
        try {
            $signature = '';
            if (!openssl_sign($payload, $signature, $key, $this->algorithm())) {
                $error = openssl_error_string();
                assert(is_string($error));
                throw CannotSignPayload::errorHappened($error);
            }
            return $signature;
        } finally {
            $this->freeKey($key);
        }
    }
    /**
     * @return resource|OpenSSLAsymmetricKey
     *
     * @throws CannotSignPayload
     */
    private function getPrivateKey(string $pem, string $passphrase)
    {
        $privateKey = openssl_pkey_get_private($pem, $passphrase);
        $this->validateKey($privateKey);
        return $privateKey;
    }
    /** @throws InvalidKeyProvided */
    protected final function verifySignature(string $expected, string $payload, string $pem) : bool
    {
        $key = $this->getPublicKey($pem);
        $result = openssl_verify($payload, $expected, $key, $this->algorithm());
        $this->freeKey($key);
        return $result === 1;
    }
    /**
     * @return resource|OpenSSLAsymmetricKey
     *
     * @throws InvalidKeyProvided
     */
    private function getPublicKey(string $pem)
    {
        $publicKey = openssl_pkey_get_public($pem);
        $this->validateKey($publicKey);
        return $publicKey;
    }
    /**
     * Raises an exception when the key type is not the expected type
     *
     * @param resource|OpenSSLAsymmetricKey|bool $key
     *
     * @throws InvalidKeyProvided
     */
    private function validateKey($key) : void
    {
        if (is_bool($key)) {
            $error = openssl_error_string();
            assert(is_string($error));
            throw InvalidKeyProvided::cannotBeParsed($error);
        }
        $details = openssl_pkey_get_details($key);
        assert(is_array($details));
        if (!array_key_exists('key', $details) || $details['type'] !== $this->keyType()) {
            throw InvalidKeyProvided::incompatibleKey();
        }
    }
    /** @param resource|OpenSSLAsymmetricKey $key */
    private function freeKey($key) : void
    {
        if ($key instanceof OpenSSLAsymmetricKey) {
            return;
        }
        openssl_free_key($key);
        // Deprecated and no longer necessary as of PHP >= 8.0
    }
    /**
     * Returns the type of key to be used to create/verify the signature (using OpenSSL constants)
     *
     * @internal
     */
    public abstract function keyType() : int;
    /**
     * Returns which algorithm to be used to create/verify the signature (using OpenSSL constants)
     *
     * @internal
     */
    public abstract function algorithm() : int;
}