(PHP 4 >= 4.2.0, PHP 5)

openssl_x509_check_private_keyChecks if a private key corresponds to a certificate


bool openssl_x509_check_private_key ( mixed $cert , mixed $key )

Checks whether the given key is the private key that corresponds to cert.

Elenco dei parametri


The certificate.


The private key.

Valori restituiti

Returns TRUE if key is the private key that corresponds to cert, or FALSE otherwise.

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User Contributed Notes 2 notes

jared at enhancesoft dot com
3 years ago
This function will return FALSE if the private key requires a pass phrase.
tomsie at toms dot ie
5 months ago
This function DOES return TRUE if the key has a passphrase, you just need to set up the data in such a way that the function can understand it. It is not documented here.

This error message led me to the solution:

PHP Warning:  openssl_x509_check_private_key(): key array must be of the form array(0 => key, 1 => phrase)

So this works:

$certFile = file_get_contents('cert.crt');
$keyFile = file_get_contents('cert.key');
$keyPassphrase = "password1234";
$keyCheckData = array(0=>$keyFile,1=>$keyPassphrase);
$result = openssl_x509_check_private_key($certFile,$keyCheckData);
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