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);
}
openssl_cms_encrypt
(PHP 8)
openssl_cms_encrypt — Encrypt a CMS message
Description
openssl_cms_encrypt(
string
string
OpenSSLCertificate|array|string
?array
int
int
int
): bool
string
$input_filename,string
$output_filename,OpenSSLCertificate|array|string
$certificate,?array
$headers,int
$flags = 0,int
$encoding = OPENSSL_ENCODING_SMIME,int
$cipher_algo = OPENSSL_CIPHER_AES_128_CBC): bool
This function encrypts content to one or more recipients, based on the certificates that are passed to it.
Liste de paramètres
-
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_ENCODING_SMIME,OPENSSL_ENCODING_DERorOPENSSL_ENCODING_PEM. -
cipher_algo -
A cypher to use.
Valeurs de retour
Cette fonction retourne true en cas de succès ou false si une erreur survient.
Historique
| Version | Description |
|---|---|
| 8.1.0 |
The default cipher algorithm (cipher_algo) is now
AES-128-CBC (OPENSSL_CIPHER_AES_128_CBC). Previously,
PKCS7/CMS was used (OPENSSL_CIPHER_RC2_40).
|
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User Contributed Notes 1 note
Sebastian ¶
3 years ago
