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.
113 lines
3.1 KiB
PHP
113 lines
3.1 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 "=== Pad Codewords Analysis ===\n\n";
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// For "HELLO WORLD", Version 1, Level M:
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// - Mode: 4 bits (0100)
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// - Count: 8 bits (00001011)
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// - Data: 11 bytes = 88 bits
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// - Total so far: 100 bits
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// - Required: 128 bits (16 codewords * 8)
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// - Need: 28 more bits
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echo "Bit breakdown:\n";
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echo "Mode: 4 bits\n";
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echo "Count: 8 bits\n";
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echo "Data: 88 bits (11 bytes)\n";
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echo "Subtotal: 100 bits\n";
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echo "Required: 128 bits\n";
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echo "Needed: 28 bits\n\n";
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// Terminator: 4 bits (0000)
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$terminator = "0000";
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echo "After terminator: 104 bits\n";
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// Pad to multiple of 8: 104 is already multiple of 8
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echo "After padding to 8: 104 bits\n";
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// Need 24 more bits (3 pad codewords)
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$padBytes = ['11101100', '00010001'];
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$padSequence = $padBytes[0] . $padBytes[1] . $padBytes[0];
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echo "Pad sequence (24 bits): {$padSequence}\n\n";
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// So the full bit string should be:
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$fullBits = "0100" . // Mode
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"00001011" . // Count
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"0100100001000101010011000100110001001111001000000101011101001111010100100100110001000100" . // Data (88 bits)
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"0000" . // Terminator
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$padSequence; // 24 bits
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echo "Full bit string (128 bits):\n";
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echo $fullBits . "\n\n";
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// Convert to codewords
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$codewords = [];
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for ($i = 0; $i < 128; $i += 8) {
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$byte = substr($fullBits, $i, 8);
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$codewords[] = bindec($byte);
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}
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echo "Codewords from our calculation:\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(', ', $expected) . "\n\n";
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// Compare bit by bit
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echo "=== Bit-by-Bit Comparison ===\n";
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for ($i = 0; $i < 16; $i++) {
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$ourBits = str_pad(decbin($codewords[$i]), 8, '0', STR_PAD_LEFT);
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$expectedBits = str_pad(decbin($expected[$i]), 8, '0', STR_PAD_LEFT);
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if ($ourBits !== $expectedBits) {
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echo "❌ Codeword {$i}: {$ourBits} vs {$expectedBits}\n";
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// Show which bits differ
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for ($j = 0; $j < 8; $j++) {
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if ($ourBits[$j] !== $expectedBits[$j]) {
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echo " Bit {$j} differs: got '{$ourBits[$j]}', expected '{$expectedBits[$j]}'\n";
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}
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}
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} else {
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echo "✅ Codeword {$i}: {$ourBits}\n";
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}
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}
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// Let's check what the expected codewords represent in bits
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echo "\n=== Expected Bit String ===\n";
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$expectedBitString = '';
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foreach ($expected as $codeword) {
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$expectedBitString .= str_pad(decbin($codeword), 8, '0', STR_PAD_LEFT);
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}
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echo "Expected bit string (128 bits):\n";
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echo $expectedBitString . "\n\n";
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// Compare with our bit string
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echo "Our bit string (128 bits):\n";
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echo $fullBits . "\n\n";
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$differences = 0;
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for ($i = 0; $i < 128; $i++) {
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if ($fullBits[$i] !== $expectedBitString[$i]) {
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$differences++;
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if ($differences <= 10) {
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echo "Bit {$i} differs: got '{$fullBits[$i]}', expected '{$expectedBitString[$i]}'\n";
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}
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}
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}
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if ($differences === 0) {
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echo "✅ Bit strings match!\n";
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} else {
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echo "❌ {$differences} bits differ\n";
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}
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