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reorganized for hybrid encryption

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This commit is contained in:
vincent 2025-04-19 20:51:32 +02:00
parent 53a52632a7
commit 74b5420aa9
1 changed files with 32 additions and 34 deletions
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66
send.php
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@ -63,7 +63,8 @@ function pushMetadata($messageId, $receiver, $color, $body_hash){
}
function pushInternal($messageId, $body){
function pushData($messageId, $body, $internal_key, $external_key){
global $dbservername;
global $dbusername;
global $dbpassword;
@ -73,31 +74,10 @@ function pushInternal($messageId, $body){
if ($conn->connect_error) {
die("Server Error");
}
$sql = "INSERT INTO smz_messages_internal (message_id, message_body) VALUES ('$messageId', '$body')";
$sql = "INSERT INTO smz_messages_data (message_id, message_body, internal_key, external_key) VALUES ('$messageId', '$body', '$internal_key', '$external_key')";
if ($conn->query($sql) === TRUE) {
echo "INTERNAL erfolgreich gespeichert";
} else {
echo "Error: " . $sql . "<br>" . $conn->error;
}
$conn->close();
}
function pushExternal($messageId, $body){
global $dbservername;
global $dbusername;
global $dbpassword;
global $dbname;
$conn = new mysqli($dbservername, $dbusername, $dbpassword, $dbname);
if ($conn->connect_error) {
die("Server Error");
}
$sql = "INSERT INTO smz_messages_external (message_id, message_body) VALUES ('$messageId', '$body')";
if ($conn->query($sql) === TRUE) {
echo "EXTERNAL erfolgreich gespeichert";
echo "DATA erfolgreich gespeichert";
} else {
echo "Error: " . $sql . "<br>" . $conn->error;
}
@ -108,20 +88,38 @@ function pushExternal($messageId, $body){
include('keyGrab.php');
$sender_key = grabPublicKey($uid);
$receiver_key = grabPublicKey($receiver);
$encryptedBodyINTERNAL = '';
$encryptedBodyEXTERNAL = '';
$encryptedINTERNAL = openssl_public_encrypt($body, $encryptedBodyINTERNAL, $sender_key, OPENSSL_PKCS1_PADDING);
$encryptedEXTERNAL = openssl_public_encrypt($body, $encryptedBodyEXTERNAL, $receiver_key, OPENSSL_PKCS1_PADDING);
$aesKey = openssl_random_pseudo_bytes(32);
$iv = openssl_random_pseudo_bytes(openssl_cipher_iv_length('aes-256-cbc'));
$encryptedBody = openssl_encrypt($body, 'aes-256-cbc', $aesKey, 0, $iv);
if ($encryptedINTERNAL === false) {
die("Fehler beim Verschlüsseln (internal): " . openssl_error_string());
$encryptedAesKey = '';
$encryptionOkEXT = openssl_public_encrypt($aesKey, $encryptedAesKeyEXTERNAL, $receiver_key, OPENSSL_PKCS1_PADDING);
$encryptionOkINT = openssl_public_encrypt($aesKey, $encryptedAesKeyINTERNAL, $sender_key, OPENSSL_PKCS1_PADDING);
if ($encryptionOkEXT === false) {
die("Fehler beim Verschlüsseln des AES-Schlüssels (EXTERNAL): " . openssl_error_string());
}
if ($encryptedEXTERNAL === false) {
die("Fehler beim Verschlüsseln (external): " . openssl_error_string());
if ($encryptionOkINT === false) {
die("Fehler beim Verschlüsseln des AES-Schlüssels (INTERNAL): " . openssl_error_string());
}
pushInternal($messageId, base64_encode($encryptedBodyINTERNAL));
pushExternal($messageId, base64_encode($encryptedBodyEXTERNAL));
$encryptedMessageBase64 = base64_encode($encryptedBody);
$encryptedAesKeyBase64EXT = base64_encode($encryptedAesKeyEXTERNAL);
$encryptedAesKeyBase64INT = base64_encode($encryptedAesKeyINTERNAL);
$ivBase64 = base64_encode($iv);
// $encryptedINTERNAL = openssl_public_encrypt($body, $encryptedBodyINTERNAL, $sender_key, OPENSSL_PKCS1_PADDING);
// $encryptedEXTERNAL = openssl_public_encrypt($body, $encryptedBodyEXTERNAL, $receiver_key, OPENSSL_PKCS1_PADDING);
// if ($encryptedINTERNAL === false) {
// die("Fehler beim Verschlüsseln (internal): " . openssl_error_string());
// }
// if ($encryptedEXTERNAL === false) {
// die("Fehler beim Verschlüsseln (external): " . openssl_error_string());
// }
pushData($messageId, $encryptedMessageBase64, $encryptedAesKeyBase64INT, $encryptedAesKeyBase64EXT);
echo "<h1>ERFOLG</1>";
?>