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# openssl_pkcs7_decrypt

(PHP 4 >= 4.0.6)

openssl_pkcs7_decrypt -- Decrypts an S/MIME encrypted message

## Description

``bool openssl_pkcs7_decrypt` (string infilename, string outfilename, mixed recipcert, mixed recipkey)`

Warning
This function is EXPERIMENTAL. The behaviour of this function, the name of this function, and anything else documented about this function may change in a future release of PHP without notice. Be warned and use this function at your own risk.

Decrypts the S/MIME encrypted message contained in the file specified by `infilename` using the certificate and it's associated private key specified by `recipcert` and `recipkey`.

The decrypted message is output to the file specified by `outfilename`

Example 1. openssl_pkcs7_decrypt() example
    // $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!";

> Note: This function was added in 4.0.6.

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