基于PHPRSA密文过长加密解密越过1024的解决方法

<?php
namespace helpers;

class opensslrsa{

 //echo $private_key 私钥;
 public $private_key = '-----begin rsa private key-----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-----end rsa private key-----';

 //公钥
 public $public_key = '-----begin public key-----
migfma0gcsqgsib3dqebaquaa4gnadcbiqkbgqc+l7enzbhxkoqjufhpfklat40b
atvzhuahw/g05xshptgqm9rv8wg0eabfbdo9pub8dixdpqlyifaqktgpspjj1ow7
wkxmybqzn5iw/gn+tyfwp+mb2w6iblpwbdval2njlmu8j3lcpjw1dh4zp1oitkxz
myuuuyyfpuoto9rj2widaqab
-----end public key-----';

public $pi_key;
 public $pu_key;

 //判断公钥和私钥是否可用
 public function __construct()
 {
  $this->pi_key = openssl_pkey_get_private($this->private_key);//这个函数可用来判断私钥是否是可用的，可用返回资源id resource id
  $this->pu_key = openssl_pkey_get_public($this->public_key);//这个函数可用来判断公钥是否是可用的
  // print_r($this->pi_key);echo "n";
  // print_r($this->pu_key);echo "n";
 }

 //私钥加密
 /*public function privateencrypt($data){
  openssl_private_encrypt($data,$encrypted,$this->pi_key);
  $encrypted = $this->urlsafe_b64encode($encrypted);//加密后的内容通常含有特殊字符，需要编码转换下，在网络间通过url传输时要注意base64编码是否是url安全的
  return $encrypted;
 }*/

 public function privateencrypt($data){
  // openssl_private_encrypt($data,$encrypted,$this->pi_key);
  $crypto = '';
  foreach (str_split($data, 117) as $chunk) {
   openssl_private_encrypt($chunk, $encryptdata, $this->pi_key);
   $crypto .= $encryptdata;
  }
  $encrypted = $this->urlsafe_b64encode($crypto);//加密后的内容通常含有特殊字符，需要编码转换下，在网络间通过url传输时要注意base64编码是否是url安全的
  return $encrypted;
 }

//加密码时把特殊符号替换成url可以带的内容
 function urlsafe_b64encode($string) {
  $data = base64_encode($string);
  $data = str_replace(array('+','/','='),array('-','_',''),$data);
  return $data;
 }

 //解密码时把转换后的符号替换特殊符号
 function urlsafe_b64decode($string) {
  $data = str_replace(array('-','_'),array('+','/'),$string);
  $mod4 = strlen($data) % 4;
  if ($mod4) {
   $data .= substr('====', $mod4);
  }
  return base64_decode($data);
 }

 //私钥加密的内容通过公钥可用解密出来
 public function publicdecrypt($encrypted){
  // $encrypted = $this->urlsafe_b64decode($encrypted);
  $crypto = '';
  foreach (str_split($this->urlsafe_b64decode($encrypted), 128) as $chunk) {
   openssl_public_decrypt($chunk, $decryptdata, $this->pu_key);
   $crypto .= $decryptdata;
  }
  //openssl_public_decrypt($encrypted,$decrypted,$this->pu_key);//私钥加密的内容通过公钥可用解密出来
  return $crypto;
 }

 //公钥加密
 public function publicencrypt($data){
  //openssl_public_encrypt($data,$encrypted,$this->pu_key);//公钥加密
  $crypto = '';
  foreach (str_split($data, 117) as $chunk) {
   openssl_public_encrypt($chunk, $encryptdata, $this->pu_key);
   $crypto .= $encryptdata;
  }
  $encrypted = $this->urlsafe_b64encode($crypto);
  return $encrypted;
 }

 //私钥解密
 public function privatedecrypt($encrypted)
 {
  $crypto = '';
  foreach (str_split($this->urlsafe_b64decode($encrypted), 128) as $chunk) {
   openssl_private_decrypt($chunk, $decryptdata, $this->pi_key);
   $crypto .= $decryptdata;
  }
  //$encrypted = $this->urlsafe_b64decode($encrypted);
  //openssl_private_decrypt($encrypted,$decrypted,$this->pi_key);
  return $crypto;
 }
}