Support of different default pass schemes + support of BLF-CRYPT (#3832)

* Introduce MAILCOW_PASS_SCHEME in order to support blowfish (cf. mailcow/mailcow-dockerized#1019)

* Furthermore added dovecot to support new environment varible for MAILCOW_PASS_SCHEME defaulted to SSHA256

* Revert changes regarding gitignore.

* Added fallback to SSHA256 if environment is not proper prepared.

* No fallback within management frontend, as it must match to other components.

* Unified and corrected alignment; implemented support of SSHA512

* Currently, password_hash of PHP is using by default bcrypt (BLF). As this might change later, we must ensure, that BLF is still used after PHP changes its default.

* Switched to BLF-CRYPT by default (even on update)

* Switched to BLF-CRYPT by default (even on update)

* Adding information in config generation / update with link to supported hash algorithm

* Bump sogo version to 1.92

* Fallback to BLF-CRYPT in case password scheme is not proper defined for Mailcow administration.

data/Dockerfiles/dovecot/docker-entrypoint.sh

@@ -141,7 +141,7 @@ cat <<EOF > /etc/dovecot/sql/dovecot-dict-sql-passdb.conf
 # Autogenerated by mailcow
 driver = mysql
 connect = "host=/var/run/mysqld/mysqld.sock dbname=${DBNAME} user=${DBUSER} password=${DBPASS}"
-default_pass_scheme = SSHA256
+default_pass_scheme = ${MAILCOW_PASS_SCHEME}
 password_query = SELECT password FROM mailbox WHERE active = '1' AND username = '%u' AND domain IN (SELECT domain FROM domain WHERE domain='%d' AND active='1') AND JSON_UNQUOTE(JSON_VALUE(attributes, '$.force_pw_update')) != '1' AND (JSON_UNQUOTE(JSON_VALUE(attributes, '$.%s_access')) = '1' OR ('%s' != 'imap' AND '%s' != 'pop3'))
 EOF
 

data/Dockerfiles/sogo/bootstrap-sogo.sh

@@ -204,7 +204,7 @@ while read -r line gal
                     <key>type</key>
                     <string>sql</string>
                     <key>userPasswordAlgorithm</key>
-                    <string>ssha256</string>
+                    <string>${MAILCOW_PASS_SCHEME}</string>
                     <key>prependPasswordScheme</key>
                     <string>YES</string>
                     <key>viewURL</key>

data/web/inc/functions.inc.php

@@ -84,8 +84,25 @@ function ip_acl($ip, $networks) {
   return false;
 }
 function hash_password($password) {
-	$salt_str = bin2hex(openssl_random_pseudo_bytes(8));
-	return "{SSHA256}".base64_encode(hash('sha256', $password . $salt_str, true) . $salt_str);
+  // default_pass_scheme is determined in vars.inc.php (or corresponding local file)
+  // in case default pass scheme is not defined, falling back to BLF-CRYPT.
+  global $default_pass_scheme;
+  $pw_hash = NULL;
+  switch (strtoupper($default_pass_scheme)) {
+    case "SSHA256":
+      $salt_str = bin2hex(openssl_random_pseudo_bytes(8));
+      $pw_hash = "{SSHA256}".base64_encode(hash('sha256', $password . $salt_str, true) . $salt_str);
+      break;
+    case "SSHA512":
+      $salt_str = bin2hex(openssl_random_pseudo_bytes(8));
+      $pw_hash = "{SSHA512}".base64_encode(hash('sha512', $password . $salt_str, true) . $salt_str);
+      break;
+    case "BLF-CRYPT":
+    default:
+      $pw_hash = "{BLF-CRYPT}" . password_hash($password, PASSWORD_BCRYPT);
+      break;
+  }
+  return $pw_hash;
 }
 function last_login($user) {
   global $pdo;
@@ -502,6 +519,12 @@ function verify_hash($hash, $password) {
     if (password_verify($password, $hash)) {
       return true;
     }
+  } 
+  elseif (preg_match('/^{BLF-CRYPT}/i', $hash)) {
+    $hash = preg_replace('/^{BLF-CRYPT}/i', '', $hash);
+    if (password_verify($password, $hash)) {
+      return true;
+    }
   }
   return false;
 }

data/web/inc/vars.inc.php

@@ -17,6 +17,7 @@ $database_name = getenv('DBNAME');
 
 // Other variables
 $mailcow_hostname = getenv('MAILCOW_HOSTNAME');
+$default_pass_scheme = getenv('MAILCOW_PASS_SCHEME');
 
 // Autodiscover settings
 // ===