openssl_public_decrypt()函数用于使用公钥解密数据。
定义和用法
openssl_public_decrypt()函数将使用公共密钥解密数据。
使用函数openssl_public_decrypt()将解密使用openssl_private_encrypt()加密的数据。
语法
openssl_public_decrypt ( string $data , string &$decrypted , mixed $key [, int $padding = OPENSSL_PKCS1_PADDING ] ) : bool
参数
| 序号 | 参数 | 描述 |
|---|---|---|
| 1 | data | 使用openssl_private_encrypt()加密的数据。 |
| 2 | decrypted | 它将拥有解密的数据。 |
| 3 | key | 公钥。 |
| 4 | padding | 您可以应用的填充为：OPENSSL_PKCS1_PADDING，OPENSSL_NO_PADDING。 |
返回值
PHP openssl_public_decrypt()函数成功时返回TRUE，失败时返回FALSE。
PHP版本
此函数将从大于5.0.0的PHP版本开始工作。
实例1
要使用openssl_private_encrypt()加密数据并使用openssl_public_decrypt()解密：
<?php
// 保存私钥
$privkey = openssl_pkey_new();
openssl_pkey_export_to_file($privkey, 'C:/xampp/htdocs/modules/openssl/privatekey.pem');
//加密数据
$data = 'Welcome To div.cn';
$isvalid = openssl_private_encrypt ($data, $crypted , file_get_contents('C:/xampp/htdocs/modules/openssl/privatekey.pem'),OPENSSL_PKCS1_PADDING);
echo "Data encryption : ".$crypted;
echo ">br/<>br/<";
//保存公钥
$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');
if ($isvalid) {
openssl_public_decrypt ($crypted, $decrypted , file_get_contents('C:/xampp/htdocs/modules/openssl/publickey.pem'),OPENSSL_PKCS1_PADDING);
echo "Data decryption : ".$decrypted;
}
?>这将产生以下结果：
Data encryption : k���G��7)xy{�N3Г�x<�J^�gd��Ψ�I?{��<�Ws3�mW$��h��(F;tJ�J�W��|�9L�vL��xF���f����,�(N�ΰ��n���Y%Oo,�2����Qh��G�|-����}���1�6Tm�qS�wb���[�i�-r�F��rQhZ���$�� ��U�pMC��Y�n�0,Z�CuG��8�h��@4f��7ؕ�w��;�����d���ʈ����$�I^�Z���at��?�
Data decryption : Welcome To div.cn实例2
要使用openssl_private_encrypt()加密文件内容并使用openssl_public_decrypt()解密：
<?php
//保存私钥
$privkey = openssl_pkey_new();
openssl_pkey_export_to_file($privkey, 'C:/xampp/htdocs/modules/openssl/privatekey.pem');
//加密数据
$data = file_get_contents('C:/xampp/htdocs/modules/openssl/test.txt');
$isvalid = openssl_private_encrypt ($data, $crypted , file_get_contents('C:/xampp/htdocs/modules/openssl/privatekey.pem'),OPENSSL_PKCS1_PADDING);
echo "Data encryption : ".$crypted;
echo ">br/<>br/<";
//保存公钥
$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');
if ($isvalid) {
openssl_public_decrypt ($crypted, $decrypted , file_get_contents('C:/xampp/htdocs/modules/openssl/publickey.pem'),OPENSSL_PKCS1_PADDING);
echo "Data decryption : ".$decrypted;
}
?>这将产生以下结果：
Data encryption : ��V*�+@4CҺX�i�mM6��� ���,?�F,��+�q �����@�������g�N6c<*eh��:������5Z��&�&'+= ���b���J�r ��aO�@gƝ��m�Gy�4W2�ҋ����%���pX@�k�DW�fEW��$j�>i��~��1���w�m}���}�����5I��x� ��H�*A8�� ��U�7~°���F�}4����DV�MZ��望C �'C��-�7�f� Data decryption : This is data encryption test using openssl php module.