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>openssl_pkcs7_verify</H1
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><P
> (PHP 4 >= 4.0.6)</P
>openssl_pkcs7_verify -- Verifies the signature of an S/MIME signed message</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN56090"
></A
><H2
>Description</H2
>bool <B
CLASS="methodname"
>openssl_pkcs7_verify</B
> ( string filename, int flags [, string outfilename [, array cainfo [, string extracerts]]])<BR
></BR
><P
> <B
CLASS="function"
>openssl_pkcs7_verify()</B
> reads the S/MIME message
contained in the filename specified by <TT
CLASS="parameter"
><I
>filename</I
></TT
> and
examines the digital signature. It returns <TT
CLASS="constant"
><B
>TRUE</B
></TT
> if the signature is
verified, <TT
CLASS="constant"
><B
>FALSE</B
></TT
> if it is not correct (the message has been tampered with,
or the signing certificate is invalid), or -1 on error.
</P
><P
> <TT
CLASS="parameter"
><I
>flags</I
></TT
> can be used to affect how the signature is
verified - see <A
HREF="ref.openssl.html#openssl.pkcs7.flags"
>PKCS7 constants</A
>
for more information.
</P
><P
> If the <TT
CLASS="parameter"
><I
>outfilename</I
></TT
> is specified, it should be a
string holding the name of a file into which the certificates of the
persons that signed the messages will be stored in PEM format.
</P
><P
> If the <TT
CLASS="parameter"
><I
>cainfo</I
></TT
> is specified, it should hold
information about the trusted CA certificates to use in the verification
process - see <A
HREF="ref.openssl.html#openssl.cert.verification"
>certificate
verification</A
> for more information about this parameter.
</P
><P
> If the <TT
CLASS="parameter"
><I
>extracerts</I
></TT
> is specified, it is the filename
of a file containing a bunch of certificates to use as untrusted CAs.
</P
><DIV
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><BLOCKQUOTE
CLASS="note"
><P
><B
>Nota: </B
>This function was added in 4.0.6.</P
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