openssl_pkey_get_public()函數(shù)用于從證書中解析公鑰，以供使用。
openssl_pkey_get_public()函數(shù)將返回您的公鑰。
函數(shù)openssl_pkey_get_public()從給定證書中返回公鑰，以便可以與其他函數(shù)一起使用。
openssl_pkey_get_public ( mixed $certificate ) : resource
| 序號 | 參數(shù) | 描述 |
|---|---|---|
| 1 | certificate | 您可以使用以下證書： 1. X.509證書資源 2.來自文件的公鑰，格式為file：//path/to/file.pem。 3. PEM格式的公鑰。 |
如果沒有錯(cuò)誤，PHP openssl_pkey_get_public()函數(shù)將返回一個(gè)正資源標(biāo)識符。如果失敗，它將返回false。
此函數(shù)將從大于5.0.0的PHP版本開始工作。
使用X.509證書的openssl_pkey_get_public()的工作-
<?php
$dn = array(
"countryName" => "IN",
"stateOrProvinceName" => "Karnataka",
"localityName" => "test1",
"organizationName" => "test2",
"organizationalUnitName" => "test3",
"commonName" => "www.test.com",
"emailAddress" => "xyz@test.com"
);
// 生成新的私鑰/公鑰對
$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);
?>輸出結(jié)果
Resource id #5
使用.pem文件的openssl_pkey_get_public()工作-
<?php
$dn = array(
"countryName" => "IN",
"stateOrProvinceName" => "Karnataka",
"localityName" => "test1",
"organizationName" => "test2",
"organizationalUnitName" => "test3",
"commonName" => "www.test.com",
"emailAddress" => "xyz@test.com"
);
//生成新的私鑰/公鑰對
$privkey = openssl_pkey_new();
//生成證書
$csr = openssl_csr_new($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'));
?>輸出結(jié)果
Resource id #7