PHP openssl_public_encrypt()用法及代碼示例

定義和用法

這個openssl_public_encrypt()函數將使用公鑰加密數據。

描述

使用函數 openssl_public_encrypt() 數據將被加密，並且可以使用 openssl_private_decrypt() 解密。

用法

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

參數

Sr.No	參數	描述
1	data	。
2	encrypted	它將具有加密的數據。
3	key	公鑰。
4	padding	您可以應用的填充是：OPENSSL_PKCS1_PADDING、OPENSSL_SSLV23_PADDING、OPENSSL_PKCS1_OAEP_PADDING、OPENSSL_NO_PADDING。

返回值

PHP openssl_public_encrypt() 函數在成功時返回 TRUE，在失敗時返回 FALSE。

PHP版本

此函數適用於 5.0.0 以上的 PHP 版本。

例子1

使用 openssl_public_encrypt() 使用公鑰加密數據：

<?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;
?>

這將產生以下結果：

Data encryption:��E �wC�ݭ�+c��f*��o���W�7�EW��$�p�.rng�_N��A1��2Uݴ~s�ap۳)w��=� ��#��g;���u��_%�Z�bb�&��m��v&����q��k

例子2

使用 openssl_public_encrypt() 加密數據並使用 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;
   }
?>

這將產生以下結果：

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