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X509: use a random serial number

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This commit is contained in:
terrafrost 2015-07-16 11:31:20 -05:00
parent cdda621903
commit 374f8db2e3
1 changed files with 15 additions and 1 deletions
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16
phpseclib/File/X509.php
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@ -317,6 +317,10 @@ class File_X509
include_once 'Math/BigInteger.php';
}
if (!function_exists('crypt_random_string')) {
include_once 'Crypt/Random.php';
}
// Explicitly Tagged Module, 1988 Syntax
// http://tools.ietf.org/html/rfc5280#appendix-A.1
@ -3277,7 +3281,12 @@ class File_X509
$startDate = !empty($this->startDate) ? $this->startDate : @date('D, d M Y H:i:s O');
$endDate = !empty($this->endDate) ? $this->endDate : @date('D, d M Y H:i:s O', strtotime('+1 year'));
$serialNumber = !empty($this->serialNumber) ? $this->serialNumber : new Math_BigInteger();
// "The serial number MUST be a positive integer"
// "Conforming CAs MUST NOT use serialNumber values longer than 20 octets."
// -- https://tools.ietf.org/html/rfc5280#section-4.1.2.2
$serialNumber = !empty($this->serialNumber) ?
$this->serialNumber :
new Math_BigInteger(crypt_random_string(20) & ("\x7F" . str_repeat("\xFF", 19)), 256);
$this->currentCert = array(
'tbsCertificate' =>
@ -3566,6 +3575,11 @@ class File_X509
$crlNumber = $this->serialNumber;
} else {
$crlNumber = $this->getExtension('id-ce-cRLNumber');
// "The CRL number is a non-critical CRL extension that conveys a
// monotonically increasing sequence number for a given CRL scope and
// CRL issuer. This extension allows users to easily determine when a
// particular CRL supersedes another CRL."
// -- https://tools.ietf.org/html/rfc5280#section-5.2.3
$crlNumber = $crlNumber !== false ? $crlNumber->add(new Math_BigInteger(1)) : null;
}