php使用openssl进行Rsa长数据加密,解密保存问题

原来代码：

public function encrypt($data) { 
    if (openssl_public_encrypt(base64_encode($data), $encrypted, $this->pubkey)) 
        $data = base64_encode($encrypted); 
    else 
        throw new Exception('Unable to encrypt data. Perhaps it is bigger than the key size?'); 
 
    return $data; 
} 
 
public function decrypt($data) { 
    if (openssl_private_decrypt(base64_decode($data), $decrypted, $this->privkey)) 
        $data = $decrypted; 
    else 
        $data = ''; 
 
    return $data; 
}

修改分段以后：

public function encrypt($originalData){
    $crypto = '';
    foreach (str_split($originalData, 117) as $chunk) {
        openssl_public_encrypt($chunk, $encryptData, $this->pubkey);
        $crypto .= $encryptData;
    }
    return base64_encode($crypto);
}
 
public function decrypt($encryptData){
    $crypto = '';
    foreach (str_split(base64_decode($encryptData), 128) as $chunk) {
        openssl_private_decrypt($chunk, $decryptData, $this->privkey);
        $crypto .= $decryptData;
    }
    return $crypto;
}