openssl_pkey_new

(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)

openssl_pkey_new — Yeni bir gizli anahtar üretir

Açıklama

openssl_pkey_new(?array $seçenekler = ?): OpenSSLAsymmetricKey|false

Yeni bir gizli anahtar üretir. Genel anahtarın elde edilişi aşağıdaki örnekte gösterilmiştir.

Bilginize: Bu işlevin gerektiği gibi çalışması için geçerli bir openssl.cnf kurulu olmalıdır. Daha ayrıntılı bilgi için kurulum bölümüne bakılabilir.

Bağımsız Değişkenler

seçenekler: Anahtar üretimine ince ayar çekmek için (bit sayısını belirtmek gibi) kullanılabilir. Daha ayrıntılı bilgi için openssl_csr_new() işlevine bakınız.

Dönen Değerler

İşlem başarısız olursa false yoksa OpenSSLAsymmetricKey örneği döner.

Sürüm Bilgisi

Sürüm:	Açıklama
8.0.0	Başarı durumunda işlev artık OpenSSLAsymmetricKey örneği döndürüyor; evvelce `OpenSSL key` özkaynağı dönerdi.
7.1.0	EC anahtarlarının üretilebilmesi için `curve_name` seçeneği eklendi.

Örnekler

Örnek 1 - Genel anahtarın gizli anahtardan elde edilmesi

<?php
$private_key = openssl_pkey_new();
$public_key_pem = openssl_pkey_get_details($private_key)['key'];
echo $public_key_pem;
$public_key = openssl_pkey_get_public($public_key_pem);
var_dump($public_key);
?>

Yukarıdaki örnek şuna benzer bir çıktı üretir:

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArZFsmN2P6rx1Xt7YV95o
gcdlal0k3ryiIhFNzjwtRNNTXfEfBr6lUuaIJYQ8/XqEBX0hpcfuuF6tTRlonA3t
WLME0QFD93YVsAaXcy76YqjjqcRRodIBphAbYyyMI/lXkQAdn7kbAmr7neSOsMYJ
El9Wo4Hl4oG6e52ZnYHyqW9dxh4hX93eupR2TmcCdVf+r9xoHewP0KJYSHt7vDUX
AQlWYcQiWHIadFsmL0orr6mutlXFReoHbesgKY9/3YLOu0JfxflSjIZ2JeL1NTl1
MsmODsUwgAUrwnWKKx+eQUP5g3GnSB3dPkRh9zRVRiLNWbCugyjrf3e6DgQWrW7j
pwIDAQAB
-----END PUBLIC KEY-----
resource(5) of type (OpenSSL key)

Found A Problem?

Learn How To Improve This Page • Submit a Pull Request • Report a Bug

＋add a note

User Contributed Notes 8 notes

down

dirt at awoms dot com ¶

11 years ago

Working example:

$config = array(
    "digest_alg" => "sha512",
    "private_key_bits" => 4096,
    "private_key_type" => OPENSSL_KEYTYPE_RSA,
);
    
// Create the private and public key
$res = openssl_pkey_new($config);

// Extract the private key from $res to $privKey
openssl_pkey_export($res, $privKey);

// Extract the public key from $res to $pubKey
$pubKey = openssl_pkey_get_details($res);
$pubKey = $pubKey["key"];

$data = 'plaintext data goes here';

// Encrypt the data to $encrypted using the public key
openssl_public_encrypt($data, $encrypted, $pubKey);

// Decrypt the data using the private key and store the results in $decrypted
openssl_private_decrypt($encrypted, $decrypted, $privKey);

echo $decrypted;

down

gomez dot alejandre at gmail dot com ¶

6 years ago

Not forget the $configArgs for windows users :D, or the method throws a error with the primary key

//write your configurations :D
$configargs = array(
  "config" => "C:/xampp/php/extras/openssl/openssl.cnf",
  'private_key_bits'=> 2048,
  'default_md' => "sha256",
);

// Create the keypair
$res=openssl_pkey_new($configargs);
// Get private key
openssl_pkey_export($res, $privKey,NULL,$configargs);

and it's for all methods ._ .

a full implementation example here.

https://gist.github.com/DuckHunter213/269a0efd17e709f7f1f177ae7da46ad1

this error take me 3 full days you'r welcome :)

down

scott at brynen dot com ¶

9 years ago

If you try and generate a new key using openssl_pkey_new(), and need to specify the size of the key, the key MUST be type-bound to integer

// works
$keysize = 1024;
$ssl = openssl_pkey_new (array('private_key_bits' => $keysize));

// fails
$keysize = "1024";
$ssl = openssl_pkey_new (array('private_key_bits' => $keysize));

// works (force to int)
$keysize = "1024";
$ssl = openssl_pkey_new (array('private_key_bits' => (int)$keysize));

down

Andrew ¶

3 years ago

It's not documented here but you can also create ECC keys from existing key parameters (e.g. from JWK):

<?php
$key = openssl_pkey_new([
    'ec' => [
        'curve_name' => 'prime256v1',
        'x' => $someXValue,
        'y' => $someYValue,
        'd' => $someDValue
    ]
]);
?>

You can just provide x/y if it's a public key, or you can just provide d if it's a private key.

down

Brad ¶

16 years ago

It's easier than all that, if you just want the keys:

<?php
// Create the keypair
$res=openssl_pkey_new();

// Get private key
openssl_pkey_export($res, $privkey);

// Get public key
$pubkey=openssl_pkey_get_details($res);
$pubkey=$pubkey["key"];
?>

down

Eno_CN at qq dot com ¶

23 hours ago

Some examples for generating EC keypair 

EC - generate keypair with curve_name

<?php
/* 
 * Custom parameters x, y, and d are not supported with SM2 in OpenSSL 3.x.
 * Directly creating EVP_PKEY_CTX using EVP_PKEY_CTX_new_from_name(NULL, "SM2", NULL) 
 * will result in generating incorrect private keys (which cannot be correctly recognized 
 * by existing external applications based on the SM2 algorithm).
 */
$curve_name = 'SM2';
$pkey = openssl_pkey_new(array(
    'ec'=> array(
        'curve_name' => $curve_name,
    )
));

$details = openssl_pkey_get_details($pkey);
var_dump($details);
$pubkey = $details['key'];
openssl_pkey_export($pkey, $prikey);
echo 'Private Key:', PHP_EOL, $prikey, PHP_EOL;
echo 'Public Key：', PHP_EOL, $pubkey, PHP_EOL;
?>

EC - generate keypair with custom params (OSCCA WAPIP192v1 Elliptic curve)

<?php
$d = hex2bin('8D0AC65AAEA0D6B96254C65817D4A143A9E7A03876F1A37D'); // private key binary
$x = hex2bin('98E07AAD50C31F9189EBE6B8B5C70E5DEE59D7A8BC344CC6'); // public key x binary
$y = hex2bin('6109D3D96E52D0867B9D05D72D07BE5876A3D973E0E96792'); // public key y binary

$p = hex2bin('BDB6F4FE3E8B1D9E0DA8C0D46F4C318CEFE4AFE3B6B8551F');
$a = hex2bin('BB8E5E8FBC115E139FE6A814FE48AAA6F0ADA1AA5DF91985');
$b = hex2bin('1854BEBDC31B21B7AEFC80AB0ECD10D5B1B3308E6DBF11C1');
$g_x = hex2bin('4AD5F7048DE709AD51236DE65E4D4B482C836DC6E4106640');
$g_y = hex2bin('02BB3A02D4AAADACAE24817A4CA3A1B014B5270432DB27D2');
$order = hex2bin('BDB6F4FE3E8B1D9E0DA8C0D40FC962195DFAE76F56564677');

$pkey = openssl_pkey_new(array(
    'ec'=> array(
        'p' => $p,
        'a' => $a,
        'b' => $b,
        'order' => $order,
        'g_x' => $g_x,
        'g_y' => $g_y,
        //'d' => $d, // import the private key to generate keypairs
    )
));

$details = openssl_pkey_get_details($pkey);
var_dump($details);
$pubkey = $details['key'];
openssl_pkey_export($pkey, $prikey);
echo 'Private Key:', PHP_EOL, $prikey, PHP_EOL;
echo 'Public Key：', PHP_EOL, $pubkey, PHP_EOL;
?>

EC - generate keypair with custom params (SM2 curve)

<?php
$p = hex2bin('FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFF');
$a = hex2bin('FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFC');
$b = hex2bin('28E9FA9E9D9F5E344D5A9E4BCF6509A7F39789F515AB8F92DDBCBD414D940E93');
$g_x = hex2bin('32C4AE2C1F1981195F9904466A39C9948FE30BBFF2660BE1715A4589334C74C7');
$g_y = hex2bin('BC3736A2F4F6779C59BDCEE36B692153D0A9877CC62A474002DF32E52139F0A0');
$order = hex2bin('FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFF7203DF6B21C6052B53BBF40939D54123');

/* 
 * Custom parameters x, y, and d are not supported with SM2 in OpenSSL 3.x.
 * Directly creating EVP_PKEY_CTX using EVP_PKEY_CTX_new_from_name(NULL, "SM2", NULL) 
 * will result in generating incorrect private keys (which cannot be correctly recognized 
 * by existing external applications based on the SM2 algorithm).
 */
$pkey = openssl_pkey_new(array(
    'ec'=> array(
        'p' => $p,
        'a' => $a,
        'b' => $b,
        'order' => $order,
        'g_x' => $g_x,
        'g_y' => $g_y,
    )
));

/* 
 * It is not entirely the same as generating keys through the SM2 curve naming method.
 * So the generated key will be in PKCS8 format to store algorithm information.
 */
$details = openssl_pkey_get_details($pkey);
var_dump($details);
$pubkey = $details['key'];
openssl_pkey_export($pkey, $prikey);
echo 'Private Key:', PHP_EOL, $prikey, PHP_EOL;
echo 'Public Key：', PHP_EOL, $pubkey, PHP_EOL;
?>

down

Jan ¶

6 years ago

In case this function returns false, then check your openssl.cnf and make sure that in the [req] section of this file the entry default_bits is not commented out.

down

-1

dodginess at yahoo dot com ¶

7 years ago

If you're using openssl_pkey_new() in conjunction with openssl_csr_new() and want to change the CSR digest algorithm as well as specify a custom key size, the configuration override should be defined once and sent to both functions:

<?php
$config = array(
    'digest_alg' => 'sha1',
    'private_key_bits' => 2048,
    'private_key_type' => OPENSSL_KEYTYPE_RSA,
);

$privkey = openssl_pkey_new($config);

$csr = openssl_csr_new($dn, $privkey, $config);
?>

Although openssl_pkey_new() will accept the 'digest_alg' argument it won't use it, and setting the value has no effect unless you also set this value for openssl_csr_new(). The reason for this is that the $config array is acting as a drop-in replacement for the values found in the openssl.cnf file, so it must contain all of the override values that you need even if the function they're being sent to won't use them.

Also, if you change the 'digest_alg' to something like 'sha256' and still get an MD5 signed CSR check your openssl.cnf file to see whether the digest algorithm you want to use is actually supported.

＋add a note