openssl_pkcs7_decrypt

(PHP 4 >= 4.0.6, PHP 5, PHP 7, PHP 8)

openssl_pkcs7_decryptDecrypts an S/MIME encrypted message

Description

openssl_pkcs7_decrypt(
    string $input_filename,
    string $output_filename,
    OpenSSLCertificate|string $certificate,
    OpenSSLAsymmetricKey|OpenSSLCertificate|array|string|null $private_key = null
): bool

Decrypts the S/MIME encrypted message contained in the file specified by input_filename using the certificate and its associated private key specified by certificate and private_key.

Parameters

input_filename

output_filename

The decrypted message is written to the file specified by output_filename.

certificate

private_key

Return Values

Returns true on success or false on failure.

Changelog

Version Description
8.0.0 private_key accepts an OpenSSLAsymmetricKey or OpenSSLCertificate instance now; previously, a resource of type OpenSSL key or OpenSSL X.509 CSR was accepted.

Examples

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!";
}
?>

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