JwtCertificateGenerationException example

public function generateString(?string $passphrase = null): array
    {
        $key = \openssl_pkey_new([
            'private_key_bits' => 2048,
            'digest_alg' => 'aes256',
            'private_key_type' => \OPENSSL_KEYTYPE_RSA,
            'encrypt_key' => (bool) $passphrase,
            'encrypt_key_cipher' => \OPENSSL_CIPHER_AES_256_CBC,
        ]);

        if ($key === false) {
            throw new JwtCertificateGenerationException('Failed to generate key');
        }

        if (!openssl_pkey_export($key, $privateKey, $passphrase)) {
            throw new JwtCertificateGenerationException('Failed to export private key');
        }

        $keyData = openssl_pkey_get_details($key);
        if ($keyData === false) {
            throw new JwtCertificateGenerationException('Failed to export public key');
        }