openssl_public_encrypt()函数用于使用公钥加密数据。
定义和用法
openssl_public_encrypt()函数将使用公共密钥加密数据。
使用openssl_public_encrypt()函数将对数据进行加密，并且可以使用openssl_private_decrypt()将其解密。
语法
openssl_public_encrypt ( string $data , string &$crypted , mixed $key [, int $padding = OPENSSL_PKCS1_PADDING ] ) : bool
参数
| 序号 | 参数 | 描述 |
|---|---|---|
| 1 | data | . |
| 2 | encrypted | 它将拥有加密的数据。 |
| 3 | key | 公钥。 |
| 4 | padding | 您可以应用的填充为：OPENSSL_PKCS1_PADDING，OPENSSL_SSLV23_PADDING，OPENSSL_PKCS1_OAEP_PADDING，OPENSSL_NO_PADDING。 |
返回值
PHP openssl_public_encrypt()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
使用openssl_public_encrypt() 使用公钥加密数据：
<?php
//保存私钥
$privkey = openssl_pkey_new();
openssl_pkey_export_to_file($privkey, 'C:/xampp/htdocs/modules/openssl/privatekey.pem');
//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');
//加密数据
$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;
?>这将产生以下结果：
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
实例2
要使用openssl_public_encrypt()加密数据并使用openssl_private_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');
//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');
//加密数据
$data = 'Welcome To div.cn';
$isvalid = openssl_public_encrypt ($data, $crypted , file_get_contents('C:/xampp/htdocs/modules/openssl/publickey.pem'),OPENSSL_PKCS1_PADDING);
echo "Data encryption : ".$crypted;
echo ">br/<>br/<";
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 div.cn