Hello folks! welcome back to a new edition of our tutorial on PHP. In this tutorial guide, we are going to be studying about the PHP openssl_pkey_get_public() Function.
The openssl_pkey_get_public() function returns the public key.
This built-in function returns the public key from the given certificate so that it can be used with other functions.
The openssl_pkey_get_public() function returns the public key.
This built-in function returns the public key from the given certificate so that it can be used with other functions.
syntax
Following below is the syntax to use this function -
openssl_pkey_get_public ( mixed $certificate ) : resource
READ: PHP | openssl_pkey_get_private Function
Parameter Details
| Sr.No | Parameter | Description |
|---|---|---|
| 1 | certificate | You can make use of following certificates : 1. An X.509 certificate resource 2. Public key from the file in the format file://path/to/file.pem. 3. A PEM formatted public key. |
Return Value
This built-in PHP function returns a positive resource identifier if there is no error, else it returns false if it fails.
PHP Version
This PHP function works from PHP version greater than 5.0.0.
Example1
The following example illustrates the usage of PHP openssl_pkey_get_public() function with X.509 certificate -
php
$dn = array(
"countryName" => "NRA",
"stateOrProvinceName" => "Rivers",
"localityName" => "test1",
"organizationName" => "test2",
"organizationalUnitName" => "test3",
"commonName" => "www.test.com",
"emailAddress" => "[email protected]"
);
// Generate a new private /public key pair
$privkey = openssl_pkey_new();
// Generate a certificate
$csr = openssl_csr_new($dn, $privkey, array('digest_alg' => 'sha256'));
$res_cert = openssl_csr_sign($csr, null, $privkey, 365);
openssl_x509_export($res_cert, $x_509_certificate);
echo $res_pubkey = openssl_pkey_get_public($x_509_certificate);
?>
Output
When the above code is executed, it will produce the following result -
Resource id #5
Example2
The following example illustrates the usage of PHP openssl_pkey_get_public() function using .pem file -
php
$dn = array(
"countryName" => "NRA",
"stateOrProvinceName" => "Rivers",
"localityName" => "test1",
"organizationName" => "test2",
"organizationalUnitName" => "test3",
"commonName" => "www.test.com",
"emailAddress" => "[email protected]"
);
// Generate a new private /public key pair
$privkey = openssl_pkey_new();
// Generate a certificate
$csr = openssl_csr_new($dn, $privkey, array('digest_alg' => 'sha256'));
$res_cert = openssl_csr_sign($csr, null, $privkey, 365);
openssl_x509_export_to_file($res_cert, 'C:/xampp/htdocs/modules/openssl/x_509.pem');
echo $res_pubkey = openssl_pkey_get_public(file_get_contents('C:/xampp/htdocs/modules/openssl/x_509.pem'));
?>
Output
When the above code is executed, it will produce the following result -
Resource id #7
READ: PHP | openssl_pkey_new() Function
Alright guys! This is where we are going to be rounding up for this tutorial post. In our next tutorial, we will be studying about the openssl_pkey_export_to_file() Function.
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Thanks for reading and bye for now.
Feel free to ask your questions where necessary and we will attend to them as soon as possible. If this tutorial was helpful to you, you can use the share button to share this tutorial.
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Thanks for reading and bye for now.
