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openssl_cms_encrypt

(PHP 8)

openssl_cms_encryptEncrypt a CMS message

Описание

openssl_cms_encrypt ( string $input_filename , string $output_filename , OpenSSLCertificate|array|string $certificate , array|null $headers , int $flags = 0 , int $encoding = OPENSSL_ENCODING_SMIME , int $cipher_algo = OPENSSL_CIPHER_RC2_40 ) : bool

This function encrypts content to one or more recipients, based on the certificates that are passed to it.

Список параметров

input_filename

The file to be encrypted.

output_filename

The output file.

certificate

Recipients to encrypt to.

headers

Headers to include when S/MIME is used.

flags

Flags to be passed to CMS_sign.

encoding

An encoding to output. One of OPENSSL_CMS_SMIME, OPENSLL_CMS_DER or OPENSSL_CMS_PEM.

cipher_algo

A cypher to use.

Возвращаемые значения

Возвращает true в случае успешного завершения или false в случае возникновения ошибки.

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User Contributed Notes 1 note

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Sebastian
8 days ago
It took me a while to find out the correct way how to sign and encrypt data with these functions.
I needed that to communicate with German Health Insurance Providers as part of a DiGA. Maybe someone finds that useful.

<?php
function signAndEncrypt(string $rawData): string
{
   
$tempDir = __DIR__ . '/tmp';
   
$tempfileOriginal = tempnam($tempDir, 'original');
   
$tempfileSigned = tempnam($tempDir, 'signed');
   
$tempfileEncrypted = tempnam($tempDir, 'signedEncrypted');

   
file_put_contents($tempfileOriginal, $rawData);

   
// pick the correct certificate for the recipient
   
$recipientsCertificateFile = __DIR__ . '/recipientsCertificate.pem';
   
// -----BEGIN CERTIFICATE----- ...-----END CERTIFICATE-----
   
$recipientsCertificate = file_get_contents($recipientsCertificateFile);

   
// Certificate:
    //    Data:
    //        Version: 3 (0x2)...
   
$myCertificate = file_get_contents(__DIR__ . '/my.crt');
   
$myPrivateKey = openssl_pkey_get_private(
       
// -----BEGIN RSA PRIVATE KEY----- ... -----END RSA PRIVATE KEY-----
       
file_get_contents(__DIR__ . '/my.prv.key.pem')
    );

   
openssl_cms_sign(
       
input_filename: $tempfileOriginal,
       
output_filename: $tempfileSigned,
       
certificate: $myCertificate,
       
private_key: $myPrivateKey,
       
headers: [],
       
encoding: OPENSSL_ENCODING_DER,
    );

   
openssl_cms_encrypt(
       
input_filename: $tempfileSigned,
       
output_filename: $tempfileEncrypted,
       
certificate: $recipientsCertificate,
       
headers: [],
       
flags: OPENSSL_CMS_BINARY | OPENSSL_CMS_NOSIGS | OPENSSL_CMS_NOVERIFY,
       
encoding: OPENSSL_ENCODING_DER,
       
cipher_algo: OPENSSL_CIPHER_AES_256_CBC
   
);
    return
file_get_contents($tempfileEncrypted);
}
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