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>openssl_x509_checkpurpose</H1
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><P
> (PHP 4 >= 4.0.6)</P
>openssl_x509_checkpurpose -- Verifies if a certificate can be used for a particular
purpose</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN56515"
></A
><H2
>Description</H2
>bool <B
CLASS="methodname"
>openssl_x509_checkpurpose</B
> ( mixed x509cert, int purpose, array cainfo [, string untrustedfile])<BR
></BR
><P
> Returns <TT
CLASS="constant"
><B
>TRUE</B
></TT
> if the certificate can be used for the intended purpose,
<TT
CLASS="constant"
><B
>FALSE</B
></TT
> if it cannot, or -1 on error.
</P
><P
> <B
CLASS="function"
>openssl_x509_checkpurpose()</B
> examines the certificate
specified by <TT
CLASS="parameter"
><I
>x509cert</I
></TT
> to see if it can be used for
the purpose specified by <TT
CLASS="parameter"
><I
>purpose</I
></TT
>.
</P
><P
> <TT
CLASS="parameter"
><I
>cainfo</I
></TT
> should be an array of trusted CA files/dirs
as described in <A
HREF="ref.openssl.html#openssl.cert.verification"
>Certificate
Verification</A
>.
</P
><P
><TT
CLASS="parameter"
><I
>untrustedfile</I
></TT
>, if specified,
is 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.
</P
><P
> <DIV
CLASS="table"
><A
NAME="AEN56545"
></A
><P
><B
>Tabla 1. <B
CLASS="function"
>openssl_x509_checkpurpose()</B
> purposes</B
></P
><TABLE
BORDER="1"
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><THEAD
><TR
><TH
ALIGN="LEFT"
VALIGN="MIDDLE"
>Constant</TH
><TH
ALIGN="LEFT"
VALIGN="MIDDLE"
>Description</TH
></TR
></THEAD
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>X509_PURPOSE_SSL_CLIENT</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>Can the certificate be used for the client side of an SSL
connection?</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>X509_PURPOSE_SSL_SERVER</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>Can the certificate be used for the server side of an SSL
connection?</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>X509_PURPOSE_NS_SSL_SERVER</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>Can the cert be used for Netscape SSL server?</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>X509_PURPOSE_SMIME_SIGN</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>Can the cert be used to sign S/MIME email?</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>X509_PURPOSE_SMIME_ENCRYPT</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>Can the cert be used to encrypt S/MIME email?</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>X509_PURPOSE_CRL_SIGN</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>Can the cert be used to sign a certificate revocation list
(CRL)?</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>X509_PURPOSE_ANY</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>Can the cert be used for Any/All purposes?</TD
></TR
></TBODY
></TABLE
></DIV
>
These options are not bitfields - you may specify one only!
</P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Nota: </B
>This function was added in 4.0.6.</P
></BLOCKQUOTE
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