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| author | Gab <24553253+gabrix73@users.noreply.github.com> | 2025-04-17 11:21:07 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2025-04-17 11:21:07 +0200 |
| commit | 3f9fd64e82c954799609329653645062ad0b318e (patch) | |
| tree | 75f006ad217461d6fdc10b8bbb6ccae39ad432fb | |
| parent | 306066fd87e40516abbe21e4eb85c4b5cf5193e7 (diff) | |
| download | m2usenet-and-mail2news-3f9fd64e82c954799609329653645062ad0b318e.tar.gz m2usenet-and-mail2news-3f9fd64e82c954799609329653645062ad0b318e.tar.xz m2usenet-and-mail2news-3f9fd64e82c954799609329653645062ad0b318e.zip | |
Create send.php
| -rw-r--r-- | send.php | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/send.php b/send.php new file mode 100644 index 0000000..b31d3e1 --- /dev/null +++ b/send.php @@ -0,0 +1,113 @@ +<?php +// /var/www/mail2usenet/send.php +// Send the post via the "mail2news" transport, enforcing Ed25519 signature. + +// Read POST data +$from = $_POST['from'] ?? ''; +$newsgroups = $_POST['newsgroups'] ?? ''; +$subject = $_POST['subject'] ?? ''; +$references = $_POST['references'] ?? ''; +$hashcash = $_POST['xhashcash'] ?? ''; +$pubkey = $_POST['x-ed25519-pub'] ?? ''; +$sig = $_POST['x-ed25519-sig'] ?? ''; +$message = $_POST['message'] ?? ''; + +// Validate required fields +if (!$from || !$newsgroups || !$subject || !$hashcash || !$sig || !$message) { + http_response_code(400); + echo "Missing required fields. Signature is mandatory."; + exit; +} + +// Limit to 3 newsgroups +$groups = array_filter(array_map('trim', explode(',', $newsgroups))); +if (count($groups) > 3) { + $groups = array_slice($groups, 0, 3); +} +$newsgroups = implode(', ', $groups); + +// Build raw email with dummy To for sendmail -t +$headers = []; +$headers[] = "From: $from"; +$headers[] = "To: mail2news@localhost"; +$headers[] = "Newsgroups: $newsgroups"; +$headers[] = "Subject: $subject"; +if ($references) { + $headers[] = "References: $references"; +} +// PoW header +$headers[] = "X-Hashcash: $hashcash"; +// Enforce signature immediately after PoW +$headers[] = "X-Ed25519-Sig: $sig"; +// Optionally include public key header +if ($pubkey) { + $headers[] = "X-Ed25519-Pub: $pubkey"; +} +$headers[] = "X-No-Archive: Yes"; +$headers[] = "Mime-Version: 1.0"; +$headers[] = "Content-Type: text/plain; charset=UTF-8"; +$headers[] = "Content-Transfer-Encoding: 7bit"; +$headers[] = ""; // end of headers + +$rawEmail = implode("\r\n", $headers) . "\r\n" . $message . "\r\n"; + +// Send via sendmail using mail2news transport +$sendmail = '/usr/sbin/sendmail'; +$cmd = escapeshellcmd($sendmail) . ' -i -oTransport=mail2news -t'; + +$descriptors = [ + 0 => ['pipe', 'r'], // stdin + 1 => ['pipe', 'w'], // stdout + 2 => ['pipe', 'w'], // stderr +]; + +$process = proc_open($cmd, $descriptors, $pipes); +if (!is_resource($process)) { + http_response_code(500); + echo "Failed to invoke sendmail."; + exit; +} + +// Write the raw email +fwrite($pipes[0], $rawEmail); +fclose($pipes[0]); + +// Capture and close outputs +$stderr = stream_get_contents($pipes[2]); +fclose($pipes[1]); +fclose($pipes[2]); + +$returnCode = proc_close($process); +if ($returnCode !== 0) { + http_response_code(500); + echo "Sendmail error (code {$returnCode}):\n" . nl2br(htmlspecialchars($stderr)); + exit; +} + +// Success page +?> +<!DOCTYPE html> +<html lang="en"> +<head> + <meta charset="UTF-8"> + <title>Message Sent</title> + <style> + body { font-family: sans-serif; text-align: center; padding: 50px; } + a.button { + display: inline-block; + margin-top: 20px; + padding: 10px 20px; + background: #4caf50; + color: white; + text-decoration: none; + border-radius: 4px; + } + a.button:hover { background: #45a049; } + </style> +</head> +<body> + <h1>Message Sent Successfully</h1> + <p>Your post has been handed off to the mail2news transport.</p> + <a class="button" href="https://m2usenet.virebent.art">Return to Home</a> +</body> +</html> |