openssl_x509_checkpurpose
(PHP 4 >= 4.0.6, PHP 5)
openssl_x509_checkpurpose — Verifies if a certificate can be used for a particular purpose
说明
int openssl_x509_checkpurpose
( mixed $x509cert
, int $purpose
[, array $cainfo
[, string $untrustedfile
]] )
openssl_x509_checkpurpose() examines a certificate to
see if it can be used for the specified purpose
.
参数
-
x509cert
-
The examined certificate.
-
purpose
-
openssl_x509_checkpurpose() purposes
| Constant |
Description |
| X509_PURPOSE_SSL_CLIENT |
Can the certificate be used for the client side of an SSL
connection? |
| X509_PURPOSE_SSL_SERVER |
Can the certificate be used for the server side of an SSL
connection? |
| X509_PURPOSE_NS_SSL_SERVER |
Can the cert be used for Netscape SSL server? |
| X509_PURPOSE_SMIME_SIGN |
Can the cert be used to sign S/MIME email? |
| X509_PURPOSE_SMIME_ENCRYPT |
Can the cert be used to encrypt S/MIME email? |
| X509_PURPOSE_CRL_SIGN |
Can the cert be used to sign a certificate revocation list
(CRL)? |
| X509_PURPOSE_ANY |
Can the cert be used for Any/All purposes? |
These options are not bitfields - you may specify one only!
-
cainfo
-
cainfo
should be an array of trusted CA files/dirs
as described in Certificate
Verification. It defaults to an empty array.
-
untrustedfile
-
If specified, this should be the name of a PEM encoded file holding
certificates that can be used to help verify the certificate, although
no trust in placed in the certificates that come from that file.
返回值
Returns TRUE if the certificate can be used for the intended purpose,
FALSE if it cannot, or -1 on error.