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This document uses PHP Chinese website manual Release
(PHP 4 >= 4.0.6, PHP 5)
openssl_pkcs7_decrypt — Decrypts an S/MIME encrypted message
$infilename
, string $outfilename
, mixed $recipcert
[, mixed $recipkey
] )
Decrypts the S/MIME encrypted message contained in the file specified by
infilename
using the certificate and its
associated private key specified by recipcert
and
recipkey
.
infilename
outfilename
The decrypted message is written to the file specified by
outfilename
.
recipcert
recipkey
成功时返回 TRUE
, 或者在失败时返回 FALSE
。
Example #1 openssl_pkcs7_decrypt() example
<?php
// $cert and $key are assumed to contain your personal certificate and private
// key pair, and that you are the recipient of an S/MIME message
$infilename = "encrypted.msg" ; // this file holds your encrypted message
$outfilename = "decrypted.msg" ; // make sure you can write to this file
if ( openssl_pkcs7_decrypt ( $infilename , $outfilename , $cert , $key )) {
echo "decrypted!" ;
} else {
echo "failed to decrypt!" ;
}
?>
[#1] oliver at anonsphere dot com [2011-04-28 21:16:11]
If you want to decrypt a received email, keep in mind that you need the full encrypted message including the mime header.
<?php
// Get the full message
$encrypted = imap_fetchmime($stream, $msg_number, "1", FT_UID);
$encrypted .= imap_fetchbody($stream, $msg_number, "1", FT_UID);
// Write the needed temporary files
$infile = tempnam("", "enc");
file_put_contents($infile, $encrypted);
$outfile = tempnam("", "dec");
// The certification stuff
$public = file_get_contents("/path/to/your/cert.pem");
$private = array(file_get_contents("/path/to/your/cert.pem"), "password");
// Ready? Go!
if(openssl_pkcs7_decrypt($infile, $outfile, $public, $private))
{
// Decryption successful
echo file_get_contents($outfile);
}
else
{
// Decryption failed
echo "Oh oh! Decryption failed!";
}
// Remove the temp files
@unlink($infile);
@unlink($outfile);
?>