openssl create key error php

Question

I tried this following code

// Create the keypair
$res=openssl_pkey_new();

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

// Get public key
$publickey=openssl_pkey_get_details($res);
$publickey=$publickey["key"];

but i get this error

Warning: openssl_pkey_export(): cannot get key from parameter 1 in ... Warning: openssl_pkey_get_details() expects parameter 1 to be resource, boolean given in ...

I already uncomment extension=php_openssl.dll my php.ini file. and openssl supported when i checked in phpinfo(). short of confused. i don't know how to fix this problem.

score 0 · Answer 1 · answered Jun 18 '13 at 03:54

0

Check what message the following produces.

var_dump(openssl_error_string());

http://www.php.net/manual/en/function.openssl-error-string.php

answered Jun 18 '13 at 03:54

William Byrne

506
2
4

thankyou for your answer and this is the result string(51) "error:02001003:system library:fopen:No such process" – user2467703 Jun 18 '13 at 05:06

score 0 · Answer 2 · edited May 23 '17 at 10:32

$res is supposed to be a resource. This is the return of openssl_pkey_new(). See the Documentation. But it can also be FALSE.

Errors like the one you are seeing often mean that the function that creates the resource, here openssl_pkey_new(), failed. As the documentation says,

Returns a resource identifier for the pkey on success, or FALSE on error.

So you need to check the error. I am not familiar, but openssl_error_string looks promising.

EDIT In Responce: SO question openssl-not-working-on-windows. This appears to be your problem. The processes can not find your openSSL config file. Read this OpenSLL Configuration guide by PHP

Suggestion, Use a while loop to read all the error messages, as described in the link. If it is the same error follow the instructions.

thanks for answering and this is the result string(51) "error:02001003:system library:fopen:No such process" — user2467703, Jun 18 '13 at 05:06

score 0 · Answer 3 · answered Jun 18 '13 at 15:26

I think you might have better luck with phpseclib, a pure PHP RSA implementation tbh. eg.

<?php
include('Crypt/RSA.php');

$rsa = new Crypt_RSA();

extract($rsa->createKey());

echo "$publickey<br />$privatekey";
?>

That creates a 1024-bit key by default. If you need to customize it above and beyond the default settings lmk.

openssl create key error php

3 Answers3