PHP openssl_private_decrypt()用法及代码示例

定义和用法

这个openssl_private_decrypt()函数将使用私钥解密数据。

描述

使用函数 openssl_private_decrypt() 将解密使用 openssl_private_encrypt() 加密的数据。

用法

openssl_private_decrypt ( string $data , string &$decrypted , mixed $key [, int $padding = OPENSSL_PKCS1_PADDING ] ):bool

参数

Sr.No	参数	描述
1	data	要解密的数据。
2	decrypted	它将具有解密的数据。
3	key	私钥。
4	padding	您可以应用的填充是：OPENSSL_PKCS1_PADDING、OPENSSL_SSLV23_PADDING、OPENSSL_PKCS1_OAEP_PADDING、OPENSSL_NO_PADDING..

返回值

PHP openssl_private_encrypt() 函数在成功时返回 TRUE，在失败时返回 FALSE。

PHP版本

此函数适用于 5.0.0 以上的 PHP 版本。

例子1

使用 openssl_public_encrypt() 加密数据并使用 openssl_private_decrypt() 解密：

<?php
   // Save Private Key
   $privkey = openssl_pkey_new();
   openssl_pkey_export_to_file($privkey, 'C:/xampp/htdocs/modules/openssl/privatekey.pem');
	
   //Save Public Key
   $dn = array(
      "countryName" => "IN",
      "stateOrProvinceName" => "Karnataka",
      "localityName" => "test1",
      "organizationName" => "test2",
      "organizationalUnitName" => "test3",
      "commonName" => "www.test.com",
      "emailAddress" => "xyz@test.com"
   );
   $cert = openssl_csr_new($dn, $privkey);
   $cert = openssl_csr_sign($cert, null, $privkey, 365);
   openssl_x509_export_to_file($cert, 'C:/xampp/htdocs/modules/openssl/publickey.pem');
	
	
   // To encrpt data
   $data = 'Welcome To TuorialsPoint';
   $isvalid = openssl_public_encrypt ($data, $crypted , file_get_contents('C:/xampp/htdocs/modules/openssl/publickey.pem'),OPENSSL_PKCS1_PADDING);	
   echo "Data encryption:".$crypted;
   echo ">br/<>br/&lt";
	
   if ($isvalid) {	
      openssl_private_decrypt ($crypted, $decrypted , file_get_contents('C:/xampp/htdocs/modules/openssl/privatekey.pem'),OPENSSL_PKCS1_PADDING);	
      echo "Data decryption:".$decrypted;
   }
?>

这将产生以下结果：

Data encryption:L�_}{�E*?��9[w��7p �\ϸI�?ݟ'��ݹ�n��!��ɿ�*��Xcw���Ւ�)��/��{��!j�L��I*Ï"9eV�9�=Y\�m�i䁦�M(�0PJ��Ԇ�9��C�`�a�ݧ�b��a��?�m�G$i��eU/[�eU����\=�zLdŌn"��:[\�UA��ԭ�ힲ2@-"d��s�=2�nˣ�h��q5U��浿��9�{ݼ��|�NE�a!

Data decryption:Welcome To TuorialsPoint

例子2

使用 openssl_public_encrypt() 加密文件内容并使用 openssl_private_decrypt() 解密：

<?php
   // Save Private Key
   $privkey = openssl_pkey_new();
   openssl_pkey_export_to_file($privkey, 'C:/xampp/htdocs/modules/openssl/privatekey.pem');
	
   //Save Public Key
   $dn = array(
      "countryName" => "IN",
      "stateOrProvinceName" => "Karnataka",
      "localityName" => "test1",
      "organizationName" => "test2",
      "organizationalUnitName" => "test3",
      "commonName" => "www.test.com",
      "emailAddress" => "xyz@test.com"
   );
   $cert = openssl_csr_new($dn, $privkey);
   $cert = openssl_csr_sign($cert, null, $privkey, 365);
   openssl_x509_export_to_file($cert, 'C:/xampp/htdocs/modules/openssl/publickey.pem');
	
	
   // To encrpt data
   $data = file_get_contents('C:/xampp/htdocs/modules/openssl/test.txt'); // save any data in file test.txt;
   $isvalid = openssl_public_encrypt ($data, $crypted , file_get_contents('C:/xampp/htdocs/modules/openssl/publickey.pem'),OPENSSL_PKCS1_PADDING);	
   echo "Data encryption:".$crypted;
   echo ">br/<>br/&lt";
	
   if ($isvalid) {	
      openssl_private_decrypt ($crypted, $decrypted , file_get_contents('C:/xampp/htdocs/modules/openssl/privatekey.pem'),OPENSSL_PKCS1_PADDING);	
      echo "Data decryption:".$decrypted;
   }
?>

这将产生以下结果：

Data encryption:�ى1�A��c�`�xi�j&�!$�z˚�i�*:�)�W��ai�ٶ����|t��u��m3S��`��B�fF�qu �r�Z����2X����l�P��7�{ ��v�3(5�RdCř6�]�X`�[�2��{��d�̣bP���YHz �*ب��ZX�R�RWG*��.��˸>�|f�#ԇ]�K����@ж�'�hp��À�7�T���mΓ�&��BeR���cu�Y��ƣ��-� 

Data decryption:This is data encryption test using openssl php module.