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fix(qr): Use Qt qCompress format for QR code encoding

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Amnezia Android uses qUncompress which expects:
- 4-byte big-endian uncompressed length prefix
- zlib compressed data (gzcompress output)

Previously we used a custom 12-byte header (version, compressedLen, uncompressedLen)
which was incompatible with Qt's qUncompress.

This fix ensures X-Ray QR codes can be properly decoded by Amnezia VPN app.
This commit is contained in:
infosave2007
2026-01-24 13:17:57 +03:00
parent 7734f54137
commit 644ee460af
1 changed files with 4 additions and 4 deletions
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inc/QrUtil.php
+4 -4
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@@ -63,15 +63,15 @@ class QrUtil
public static function encodeOldPayloadFromJson(string $jsonText): string public static function encodeOldPayloadFromJson(string $jsonText): string
{ {
$json = self::normalizeJson($jsonText); $json = self::normalizeJson($jsonText);
// Old format uses zlib (gzcompress) with header [version, compressed_len, uncompressed_len] // Qt qCompress format: 4-byte big-endian uncompressed length + zlib compressed data
// This is what Amnezia Android's qUncompress expects
$compressed = gzcompress($json, 9); $compressed = gzcompress($json, 9);
if ($compressed === false) { if ($compressed === false) {
throw new RuntimeException('gzcompress failed'); throw new RuntimeException('gzcompress failed');
} }
$uncompressedLen = strlen($json); $uncompressedLen = strlen($json);
$compressedLen = strlen($compressed) + 4; // Qt format: 4 bytes of uncompressed length (big-endian) + zlib data
$version = 0x07C00100; // align with working payload header (big-endian) $header = pack('N', $uncompressedLen);
$header = pack('N3', $version, $compressedLen, $uncompressedLen);
return self::urlsafe_b64_encode($header . $compressed); return self::urlsafe_b64_encode($header . $compressed);
} }