| Matthias Andreas Benkard | b382b10 | 2021-01-02 15:32:21 +0100 | [diff] [blame] | 1 | <?php
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| 2 |
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| 3 | function dkim($_action, $_data = null, $privkey = false) {
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| 4 | global $redis;
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| 5 | global $lang;
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| 6 | switch ($_action) {
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| 7 | case 'add':
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| 8 | if ($_SESSION['mailcow_cc_role'] != "admin") {
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| 9 | $_SESSION['return'][] = array(
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| 10 | 'type' => 'danger',
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| 11 | 'log' => array(__FUNCTION__, $_action, $_data, ),
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| 12 | 'msg' => 'access_denied'
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| 13 | );
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| 14 | return false;
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| 15 | }
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| 16 | $key_length = intval($_data['key_size']);
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| 17 | $dkim_selector = (isset($_data['dkim_selector'])) ? $_data['dkim_selector'] : 'dkim';
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| 18 | $domains = array_map('trim', preg_split( "/( |,|;|\n)/", $_data['domains']));
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| 19 | $domains = array_filter($domains);
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| 20 | foreach ($domains as $domain) {
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| 21 | if (!is_valid_domain_name($domain) || !is_numeric($key_length)) {
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| 22 | $_SESSION['return'][] = array(
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| 23 | 'type' => 'danger',
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| 24 | 'log' => array(__FUNCTION__, $_action, $_data, $privkey),
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| 25 | 'msg' => array('dkim_domain_or_sel_invalid', $domain)
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| 26 | );
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| 27 | continue;
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| 28 | }
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| 29 | if ($redis->hGet('DKIM_PUB_KEYS', $domain)) {
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| 30 | $_SESSION['return'][] = array(
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| 31 | 'type' => 'danger',
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| 32 | 'log' => array(__FUNCTION__, $_action, $_data, $privkey),
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| 33 | 'msg' => array('dkim_domain_or_sel_invalid', $domain)
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| 34 | );
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| 35 | continue;
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| 36 | }
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| 37 | if (!ctype_alnum(str_replace(['-', '_'], '', $dkim_selector))) {
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| 38 | $_SESSION['return'][] = array(
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| 39 | 'type' => 'danger',
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| 40 | 'log' => array(__FUNCTION__, $_action, $_data, $privkey),
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| 41 | 'msg' => array('dkim_domain_or_sel_invalid', $domain)
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| 42 | );
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| 43 | continue;
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| 44 | }
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| 45 | $config = array(
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| 46 | "digest_alg" => "sha256",
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| 47 | "private_key_bits" => $key_length,
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| 48 | "private_key_type" => OPENSSL_KEYTYPE_RSA,
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| 49 | );
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| 50 | if ($keypair_ressource = openssl_pkey_new($config)) {
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| 51 | $key_details = openssl_pkey_get_details($keypair_ressource);
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| 52 | $pubKey = implode(array_slice(
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| 53 | array_filter(
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| 54 | explode(PHP_EOL, $key_details['key'])
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| 55 | ), 1, -1)
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| 56 | );
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| 57 | // Save public key and selector to redis
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| 58 | try {
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| 59 | $redis->hSet('DKIM_PUB_KEYS', $domain, $pubKey);
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| 60 | $redis->hSet('DKIM_SELECTORS', $domain, $dkim_selector);
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| 61 | }
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| 62 | catch (RedisException $e) {
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| 63 | $_SESSION['return'][] = array(
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| 64 | 'type' => 'danger',
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| 65 | 'log' => array(__FUNCTION__, $_action, $_data, $privkey),
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| 66 | 'msg' => array('redis_error', $e)
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| 67 | );
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| 68 | continue;
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| 69 | }
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| 70 | // Export private key and save private key to redis
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| 71 | openssl_pkey_export($keypair_ressource, $privKey);
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| 72 | if (isset($privKey) && !empty($privKey)) {
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| 73 | try {
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| 74 | $redis->hSet('DKIM_PRIV_KEYS', $dkim_selector . '.' . $domain, trim($privKey));
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| 75 | }
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| 76 | catch (RedisException $e) {
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| 77 | $_SESSION['return'][] = array(
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| 78 | 'type' => 'danger',
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| 79 | 'log' => array(__FUNCTION__, $_action, $_data, $privkey),
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| 80 | 'msg' => array('redis_error', $e)
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| 81 | );
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| 82 | continue;
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| 83 | }
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| 84 | }
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| 85 | $_SESSION['return'][] = array(
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| 86 | 'type' => 'success',
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| 87 | 'log' => array(__FUNCTION__, $_action, $_data, $privkey),
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| 88 | 'msg' => array('dkim_added', $domain)
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| 89 | );
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| 90 | }
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| 91 | else {
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| 92 | $_SESSION['return'][] = array(
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| 93 | 'type' => 'danger',
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| 94 | 'log' => array(__FUNCTION__, $_action, $_data, $privkey),
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| 95 | 'msg' => array('dkim_domain_or_sel_invalid', $domain)
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| 96 | );
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| 97 | continue;
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| 98 | }
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| 99 | }
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| 100 | break;
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| 101 | case 'duplicate':
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| 102 | if ($_SESSION['mailcow_cc_role'] != "admin") {
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| 103 | $_SESSION['return'][] = array(
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| 104 | 'type' => 'danger',
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| 105 | 'log' => array(__FUNCTION__, $_action, $_data, $privkey),
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| 106 | 'msg' => 'access_denied'
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| 107 | );
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| 108 | return false;
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| 109 | }
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| 110 | $from_domain = $_data['from_domain'];
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| 111 | $from_domain_dkim = dkim('details', $from_domain, true);
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| 112 | if (empty($from_domain_dkim)) {
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| 113 | $_SESSION['return'][] = array(
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| 114 | 'type' => 'danger',
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| 115 | 'log' => array(__FUNCTION__, $_action, $_data, $privkey),
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| 116 | 'msg' => array('dkim_domain_or_sel_invalid', $from_domain)
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| 117 | );
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| 118 | continue;
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| 119 | }
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| 120 | $to_domains = (array)$_data['to_domain'];
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| 121 | $to_domains = array_filter($to_domains);
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| 122 | foreach ($to_domains as $to_domain) {
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| 123 | try {
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| 124 | $redis->hSet('DKIM_PUB_KEYS', $to_domain, $from_domain_dkim['pubkey']);
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| 125 | $redis->hSet('DKIM_SELECTORS', $to_domain, $from_domain_dkim['dkim_selector']);
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| 126 | $redis->hSet('DKIM_PRIV_KEYS', $from_domain_dkim['dkim_selector'] . '.' . $to_domain, base64_decode(trim($from_domain_dkim['privkey'])));
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| 127 | }
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| 128 | catch (RedisException $e) {
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| 129 | $_SESSION['return'][] = array(
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| 130 | 'type' => 'danger',
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| 131 | 'log' => array(__FUNCTION__, $_action, $_data, $privkey),
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| 132 | 'msg' => array('redis_error', $e)
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| 133 | );
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| 134 | continue;
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| 135 | }
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| 136 | $_SESSION['return'][] = array(
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| 137 | 'type' => 'success',
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| 138 | 'log' => array(__FUNCTION__, $_action, $_data, $privkey),
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| 139 | 'msg' => array('dkim_duplicated', $from_domain, $to_domain)
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| 140 | );
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| 141 | }
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| 142 | break;
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| 143 | case 'import':
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| 144 | if ($_SESSION['mailcow_cc_role'] != "admin") {
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| 145 | $_SESSION['return'][] = array(
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| 146 | 'type' => 'danger',
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| 147 | 'log' => array(__FUNCTION__, $_action, $_data, $privkey),
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| 148 | 'msg' => 'access_denied'
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| 149 | );
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| 150 | return false;
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| 151 | }
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| 152 | $private_key_input = trim($_data['private_key_file']);
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| 153 | $overwrite_existing = intval($_data['overwrite_existing']);
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| 154 | $private_key_normalized = preg_replace('~\r\n?~', "\n", $private_key_input);
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| 155 | $private_key = openssl_pkey_get_private($private_key_normalized);
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| 156 | if ($ssl_error = openssl_error_string()) {
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| 157 | $_SESSION['return'][] = array(
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| 158 | 'type' => 'danger',
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| 159 | 'log' => array(__FUNCTION__, $_action, $_data, $privkey),
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| 160 | 'msg' => array('private_key_error', $ssl_error)
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| 161 | );
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| 162 | return false;
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| 163 | }
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| 164 | // Explode by nl
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| 165 | $pem_public_key_array = explode(PHP_EOL, trim(openssl_pkey_get_details($private_key)['key']));
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| 166 | // Remove first and last line/item
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| 167 | array_shift($pem_public_key_array);
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| 168 | array_pop($pem_public_key_array);
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| 169 | // Implode as single string
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| 170 | $pem_public_key = implode('', $pem_public_key_array);
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| 171 | $dkim_selector = (isset($_data['dkim_selector'])) ? $_data['dkim_selector'] : 'dkim';
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| 172 | $domain = $_data['domain'];
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| 173 | if (!is_valid_domain_name($domain)) {
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| 174 | $_SESSION['return'][] = array(
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| 175 | 'type' => 'danger',
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| 176 | 'log' => array(__FUNCTION__, $_action, $_data, $privkey),
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| 177 | 'msg' => array('dkim_domain_or_sel_invalid', $domain)
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| 178 | );
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| 179 | return false;
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| 180 | }
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| 181 | if ($redis->hGet('DKIM_PUB_KEYS', $domain)) {
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| 182 | if ($overwrite_existing == 0) {
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| 183 | $_SESSION['return'][] = array(
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| 184 | 'type' => 'danger',
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| 185 | 'log' => array(__FUNCTION__, $_action, $_data, $privkey),
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| 186 | 'msg' => array('dkim_domain_or_sel_exists', $domain)
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| 187 | );
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| 188 | return false;
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| 189 | }
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| 190 | }
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| 191 | if (!ctype_alnum($dkim_selector)) {
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| 192 | $_SESSION['return'][] = array(
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| 193 | 'type' => 'danger',
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| 194 | 'log' => array(__FUNCTION__, $_action, $_data, $privkey),
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| 195 | 'msg' => array('dkim_domain_or_sel_invalid', $domain)
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| 196 | );
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| 197 | return false;
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| 198 | }
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| 199 | try {
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| 200 | dkim('delete', $domain);
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| 201 | $redis->hSet('DKIM_PUB_KEYS', $domain, $pem_public_key);
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| 202 | $redis->hSet('DKIM_SELECTORS', $domain, $dkim_selector);
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| 203 | $redis->hSet('DKIM_PRIV_KEYS', $dkim_selector . '.' . $domain, $private_key_normalized);
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| 204 | }
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| 205 | catch (RedisException $e) {
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| 206 | $_SESSION['return'][] = array(
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| 207 | 'type' => 'danger',
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| 208 | 'log' => array(__FUNCTION__, $_action, $_data, $privkey),
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| 209 | 'msg' => array('redis_error', $e)
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| 210 | );
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| 211 | return false;
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| 212 | }
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| 213 | unset($private_key_normalized);
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| 214 | unset($private_key);
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| 215 | unset($private_key_input);
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| 216 | try {
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| 217 | }
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| 218 | catch (RedisException $e) {
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| 219 | $_SESSION['return'][] = array(
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| 220 | 'type' => 'danger',
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| 221 | 'log' => array(__FUNCTION__, $_action, $_data, $privkey),
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| 222 | 'msg' => array('redis_error', $e)
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| 223 | );
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| 224 | return false;
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| 225 | }
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| 226 | $_SESSION['return'][] = array(
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| 227 | 'type' => 'success',
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| 228 | 'log' => array(__FUNCTION__, $_action, $_data, $privkey),
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| 229 | 'msg' => array('dkim_added', $domain)
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| 230 | );
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| 231 | return true;
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| 232 | break;
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| 233 | case 'details':
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| 234 | if (!hasDomainAccess($_SESSION['mailcow_cc_username'], $_SESSION['mailcow_cc_role'], $_data) && $_SESSION['mailcow_cc_role'] != "admin") {
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| 235 | return false;
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| 236 | }
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| 237 | $dkimdata = array();
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| 238 | if ($redis_dkim_key_data = $redis->hGet('DKIM_PUB_KEYS', $_data)) {
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| 239 | $dkimdata['pubkey'] = $redis_dkim_key_data;
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| 240 | if (strlen($dkimdata['pubkey']) < 391) {
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| 241 | $dkimdata['length'] = "1024";
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| 242 | }
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| 243 | elseif (strlen($dkimdata['pubkey']) < 736) {
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| 244 | $dkimdata['length'] = "2048";
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| 245 | }
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| 246 | elseif (strlen($dkimdata['pubkey']) < 1416) {
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| 247 | $dkimdata['length'] = "4096";
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| 248 | }
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| 249 | else {
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| 250 | $dkimdata['length'] = ">= 8192";
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| 251 | }
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| 252 | if ($GLOBALS['SPLIT_DKIM_255'] === true) {
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| 253 | $dkim_txt_tmp = str_split('v=DKIM1;k=rsa;t=s;s=email;p=' . $redis_dkim_key_data, 255);
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| 254 | $dkimdata['dkim_txt'] = sprintf('"%s"', implode('" "', $dkim_txt_tmp ) );
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| 255 | }
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| 256 | else {
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| 257 | $dkimdata['dkim_txt'] = 'v=DKIM1;k=rsa;t=s;s=email;p=' . $redis_dkim_key_data;
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| 258 | }
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| 259 | $dkimdata['dkim_selector'] = $redis->hGet('DKIM_SELECTORS', $_data);
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| 260 | if ($GLOBALS['SHOW_DKIM_PRIV_KEYS'] || $privkey == true) {
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| 261 | $dkimdata['privkey'] = base64_encode($redis->hGet('DKIM_PRIV_KEYS', $dkimdata['dkim_selector'] . '.' . $_data));
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| 262 | }
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| 263 | else {
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| 264 | $dkimdata['privkey'] = '';
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| 265 | }
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| 266 | }
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| 267 | return $dkimdata;
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| 268 | break;
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| 269 | case 'blind':
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| 270 | if ($_SESSION['mailcow_cc_role'] != "admin") {
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| 271 | $_SESSION['return'][] = array(
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| 272 | 'type' => 'danger',
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| 273 | 'log' => array(__FUNCTION__, $_action, $_data, $privkey),
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| 274 | 'msg' => 'access_denied'
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| 275 | );
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| 276 | return false;
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| 277 | }
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| 278 | $blinddkim = array();
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| 279 | foreach ($redis->hKeys('DKIM_PUB_KEYS') as $redis_dkim_domain) {
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| 280 | $blinddkim[] = $redis_dkim_domain;
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| 281 | }
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| 282 | return array_diff($blinddkim, array_merge(mailbox('get', 'domains'), mailbox('get', 'alias_domains')));
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| 283 | break;
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| 284 | case 'delete':
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| 285 | $domains = (array)$_data['domains'];
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| 286 | if ($_SESSION['mailcow_cc_role'] != "admin") {
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| 287 | $_SESSION['return'][] = array(
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| 288 | 'type' => 'danger',
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| 289 | 'log' => array(__FUNCTION__, $_action, $_data, $privkey),
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| 290 | 'msg' => 'access_denied'
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| 291 | );
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| 292 | return false;
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| 293 | }
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| 294 | foreach ($domains as $domain) {
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| 295 | if (!is_valid_domain_name($domain)) {
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| 296 | $_SESSION['return'][] = array(
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| 297 | 'type' => 'danger',
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| 298 | 'log' => array(__FUNCTION__, $_action, $_data, $privkey),
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| 299 | 'msg' => array('dkim_domain_or_sel_invalid', $domain)
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| 300 | );
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| 301 | continue;
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| 302 | }
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| 303 | try {
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| 304 | $selector = $redis->hGet('DKIM_SELECTORS', $domain);
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| 305 | $redis->hDel('DKIM_PUB_KEYS', $domain);
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| 306 | $redis->hDel('DKIM_PRIV_KEYS', $selector . '.' . $domain);
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| 307 | $redis->hDel('DKIM_SELECTORS', $domain);
|
| 308 | }
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| 309 | catch (RedisException $e) {
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| 310 | $_SESSION['return'][] = array(
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| 311 | 'type' => 'danger',
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| 312 | 'log' => array(__FUNCTION__, $_action, $_data, $privkey),
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| 313 | 'msg' => array('redis_error', $e)
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| 314 | );
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| 315 | continue;
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| 316 | }
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| 317 | $_SESSION['return'][] = array(
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| 318 | 'type' => 'success',
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| 319 | 'log' => array(__FUNCTION__, $_action, $_data, $privkey),
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| 320 | 'msg' => array('dkim_removed', htmlspecialchars($domain))
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| 321 | );
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| 322 | }
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| 323 | break;
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| 324 | }
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| 325 | }
|