RSA加密公钥问题

$config = array(
    "digest_alg" => "sha512",
    "private_key_bits" => 4096,
    "private_key_type" => OPENSSL_KEYTYPE_RSA,
);

$res = openssl_pkey_new($config);
openssl_pkey_export($res, $private_key);

$public_key = openssl_pkey_get_details($res);
$public_key = $public_key['key'];

$data = 'Hello RSA';
openssl_public_encrypt($data, $encrypted, $public_key);

openssl_private_decrypt($encrypted, $decrypted, $private_key);
echo $decrypted;

用openssl_public_encrypt方法

$password = '123456';
openssl_public_encrypt($password,$encrypted,$pubKey);
echo $encrypted;

$pubKey = "-----BEGIN PUBLIC KEY-----\n"
    . wordwrap($pubKey, 64, "\n", true)
    . "\n-----END PUBLIC KEY-----";
$pubKey = openssl_pkey_get_public($pubKey);
$password = '123456';
openssl_public_encrypt($password,$encrypted,$pubKey);
echo $encrypted;