Michael Schiemer
95147ff23e
Remove WireGuard integration from production deployment to simplify infrastructure: - Remove docker-compose-direct-access.yml (VPN-bound services) - Remove VPN-only middlewares from Grafana, Prometheus, Portainer - Remove WireGuard middleware definitions from Traefik - Remove WireGuard IPs (10.8.0.0/24) from Traefik forwarded headers All monitoring services now publicly accessible via subdomains: - grafana.michaelschiemer.de (with Grafana native auth) - prometheus.michaelschiemer.de (with Basic Auth) - portainer.michaelschiemer.de (with Portainer native auth) All services use Let's Encrypt SSL certificates via Traefik.
108 lines
3.3 KiB
PHP
108 lines
3.3 KiB
PHP
<?php
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declare(strict_types=1);
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require_once __DIR__ . '/../../vendor/autoload.php';
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echo "=== Bit-by-Bit Encoding Comparison ===\n\n";
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$testData = 'HELLO WORLD';
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$dataLength = strlen($testData);
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// Build our bit string
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$bits = '';
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// 1. Mode indicator (4 bits) - Byte mode = 0100
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$bits .= '0100';
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// 2. Character count (8 bits for version 1-9)
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$bits .= str_pad(decbin($dataLength), 8, '0', STR_PAD_LEFT);
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// 3. Data bytes
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for ($i = 0; $i < $dataLength; $i++) {
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$byte = ord($testData[$i]);
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$bits .= str_pad(decbin($byte), 8, '0', STR_PAD_LEFT);
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}
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echo "Bits after mode + count + data: " . strlen($bits) . "\n";
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echo "First 60 bits: " . substr($bits, 0, 60) . "...\n\n";
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// 4. Terminator
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$requiredBits = 16 * 8; // 128 bits for version 1, level M
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$terminatorLength = min(4, max(0, $requiredBits - strlen($bits)));
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$bits .= str_repeat('0', $terminatorLength);
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echo "After terminator ({$terminatorLength} bits): " . strlen($bits) . " bits\n\n";
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// 5. Pad to multiple of 8
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$remainder = strlen($bits) % 8;
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if ($remainder !== 0) {
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$bits .= str_repeat('0', 8 - $remainder);
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}
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echo "After padding to byte: " . strlen($bits) . " bits\n\n";
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// 6. Add pad codewords
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$padBytes = ['11101100', '00010001'];
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$padIndex = 0;
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$padBits = '';
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while (strlen($bits) < $requiredBits) {
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$padBits .= $padBytes[$padIndex % 2];
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$bits .= $padBytes[$padIndex % 2];
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$padIndex++;
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}
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echo "Pad codewords added: {$padIndex}\n";
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echo "Pad bits: {$padBits}\n\n";
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// 7. Convert to codewords
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$codewords = [];
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for ($i = 0; $i < strlen($bits); $i += 8) {
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$byte = substr($bits, $i, 8);
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$codewords[] = bindec($byte);
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}
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echo "Generated codewords:\n";
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echo implode(', ', $codewords) . "\n\n";
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// Expected codewords
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$expected = [64, 180, 132, 84, 196, 196, 242, 5, 116, 245, 174, 59, 64, 109, 236, 233];
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echo "Expected codewords:\n";
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echo implode(', ', $expected) . "\n\n";
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// Compare bit strings
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$expectedBits = '';
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foreach ($expected as $codeword) {
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$expectedBits .= str_pad(decbin($codeword), 8, '0', STR_PAD_LEFT);
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}
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echo "=== Bit String Comparison ===\n";
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echo "Our bit string length: " . strlen($bits) . "\n";
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echo "Expected bit string length: " . strlen($expectedBits) . "\n\n";
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// Find first difference
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$minLength = min(strlen($bits), strlen($expectedBits));
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for ($i = 0; $i < $minLength; $i++) {
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if ($bits[$i] !== $expectedBits[$i]) {
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$codewordIndex = intval($i / 8);
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$bitInCodeword = $i % 8;
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echo "❌ First difference at bit {$i} (codeword {$codewordIndex}, bit {$bitInCodeword})\n";
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echo " Our bit: {$bits[$i]}\n";
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echo " Expected: {$expectedBits[$i]}\n";
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echo " Codeword {$codewordIndex}: ours={$codewords[$codewordIndex]}, expected={$expected[$codewordIndex]}\n";
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echo " Our bits: " . substr($bits, $codewordIndex * 8, 8) . "\n";
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echo " Expected: " . substr($expectedBits, $codewordIndex * 8, 8) . "\n";
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break;
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}
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}
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// Show codeword 10 in detail
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echo "\n=== Codeword 10 Detail ===\n";
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$codeword10Offset = 10 * 8;
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echo "Our bits (80-87): " . substr($bits, $codeword10Offset, 8) . " = " . $codewords[10] . "\n";
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echo "Expected bits: " . substr($expectedBits, $codeword10Offset, 8) . " = " . $expected[10] . "\n";
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// Show surrounding context
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echo "\nContext (bits 72-95, codewords 9-11):\n";
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echo "Our: " . substr($bits, 72, 24) . "\n";
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echo "Expected: " . substr($expectedBits, 72, 24) . "\n";
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