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Fix GH-16433: Large values for openssl_csr_sign() $days overflow #16437

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Fix GH-16433: Large values for openssl_csr_sign() $days overflow #16437

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7 changes: 6 additions & 1 deletion ext/openssl/openssl.c
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Original file line number Diff line number Diff line change
Expand Up @@ -3200,6 +3200,11 @@ PHP_FUNCTION(openssl_csr_sign)
goto cleanup;
}

if (num_days < 0 || num_days > LONG_MAX / 86400) {
php_error_docref(NULL, E_WARNING, "Days must be between 0 and %ld", LONG_MAX / 86400);
goto cleanup;
}

if (PHP_SSL_REQ_PARSE(&req, args) == FAILURE) {
goto cleanup;
}
Expand Down Expand Up @@ -3251,7 +3256,7 @@ PHP_FUNCTION(openssl_csr_sign)
goto cleanup;
}
X509_gmtime_adj(X509_getm_notBefore(new_cert), 0);
X509_gmtime_adj(X509_getm_notAfter(new_cert), 60*60*24*(long)num_days);
X509_gmtime_adj(X509_getm_notAfter(new_cert), 60*60*24*num_days);
i = X509_set_pubkey(new_cert, key);
if (!i) {
php_openssl_store_errors();
Expand Down
17 changes: 17 additions & 0 deletions ext/openssl/tests/gh16433.phpt
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Original file line number Diff line number Diff line change
@@ -0,0 +1,17 @@
--TEST--
GH-16433 (Large values for openssl_csr_sign() $days overflow)
--EXTENSIONS--
openssl
--FILE--
<?php
$privkey = openssl_pkey_new();
$csr = openssl_csr_new([], $privkey);
var_dump(openssl_csr_sign($csr, null, $privkey, PHP_INT_MAX));
var_dump(openssl_csr_sign($csr, null, $privkey, -1));
?>
--EXPECTF--
Warning: openssl_csr_sign(): Days must be between 0 and %d in %s on line %d
bool(false)

Warning: openssl_csr_sign(): Days must be between 0 and %d in %s on line %d
bool(false)
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