Not using Binary::safe* functions for substr/strlen function

Several places in the code don't use Binary::safe* or CryptoUtil::safe* functions, but use raw functions instead (strlen/substr) which can act as mb_funcname instead (not count bytes for strlen/etc...) 1\. https://github.com/paragonie/airship/blob/4be7ac0f16b1744255a876a38dbe13fb1c09731a/src/Engine/Security/CSRF.php#L87 ``` $lockTo = substr($lockTo, 0, strlen($lockTo) - 1); ``` 2\. https://github.com/paragonie/airship/blob/58f96aa0e5002b60e74456502d9bfc9483d77b3d/src/Engine/Security/Util.php#L98 can be changed to use self::subString which use Binary::safeSubstr ``` \substr($mimeType, $p), ``` 3\. https://github.com/paragonie/airship/blob/0e9289553cdc538556d362faaee63be6cc534a0c/tools/audit_helper.php#L30 ``` if (\substr($print, 0, 3) === 'tmp' || \substr($print, 0, 5) === 'files') { ``` 4\. https://github.com/paragonie/airship/blob/58f96aa0e5002b60e74456502d9bfc9483d77b3d/tools/hangar/src/SessionCommand.php#L23-L24 ``` $x = \strlen($this->session['dir']); return \substr($current, $x + 1); ``` 5\. https://github.com/paragonie/airship/blob/58f96aa0e5002b60e74456502d9bfc9483d77b3d/tools/hangar/src/SessionCommand.php#L46-L47 ``` $x = \strlen($this->session['dir']); return \substr($file, $x + 1); ``` 6\. https://github.com/paragonie/airship/blob/0e9289553cdc538556d362faaee63be6cc534a0c/tools/random_audit.php#L28 ``` echo \substr($fileList[$choice], $l), "\n"; ``` 7\. https://github.com/paragonie/airship/blob/58f96aa0e5002b60e74456502d9bfc9483d77b3d/src/CommandLine/installer.php#L39 8\. https://github.com/paragonie/airship/blob/58f96aa0e5002b60e74456502d9bfc9483d77b3d/src/CommandLine/manual_update.php#L40 9\. https://github.com/paragonie/airship/blob/58f96aa0e5002b60e74456502d9bfc9483d77b3d/src/symlinks.php#L48 10\. https://github.com/paragonie/airship/blob/4aa579c564383355ad3de111a746f14a07164dba/src/config/logger.php#L28 11\. https://github.com/paragonie/airship/blob/0e9289553cdc538556d362faaee63be6cc534a0c/tools/hangar/src/Commands/Add.php#L62 12\. https://github.com/paragonie/airship/blob/0e9289553cdc538556d362faaee63be6cc534a0c/tools/hangar/src/Commands/Add.php#L62 13\. https://github.com/paragonie/airship/blob/0e9289553cdc538556d362faaee63be6cc534a0c/tools/hangar/src/hangar.php#L68 14\. https://github.com/paragonie/airship/blob/7bb8d24487e127b2210ac7f1153df8153208c3b9/tools/hangar/src/Command.php#L168 strlen usage: 1\. https://github.com/paragonie/airship/blob/ef2d4f725e5af2eae27fd919533d01b625d020b1/src/Cabin/Hull/Blueprint/Blog.php#L1080 2\. https://github.com/paragonie/airship/blob/ef2d4f725e5af2eae27fd919533d01b625d020b1/src/Cabin/Hull/Blueprint/Blog.php#L1098 3\. https://github.com/paragonie/airship/blob/58f96aa0e5002b60e74456502d9bfc9483d77b3d/src/Cabin/Hull/Landing/IndexPage.php#L43 4\. https://github.com/paragonie/airship/blob/0e9289553cdc538556d362faaee63be6cc534a0c/tools/hangar/src/Commands/Help.php#L100 5\. https://github.com/paragonie/airship/blob/0e9289553cdc538556d362faaee63be6cc534a0c/tools/hangar/src/Commands/Add.php#L60 6\. https://github.com/paragonie/airship/blob/58f96aa0e5002b60e74456502d9bfc9483d77b3d/src/Cabin/Hull/Landing/BlogPosts.php#L85 7\. https://github.com/paragonie/airship/blob/58f96aa0e5002b60e74456502d9bfc9483d77b3d/src/Cabin/Hull/Landing/BlogPosts.php#L147 8\. https://github.com/paragonie/airship/blob/0e9289553cdc538556d362faaee63be6cc534a0c/tools/hangar/src/Commands/Autorun.php#L61 9\. https://github.com/paragonie/airship/blob/0e9289553cdc538556d362faaee63be6cc534a0c/tools/hangar/src/Commands/Autorun.php#L81 10\. https://github.com/paragonie/airship/blob/4aa579c564383355ad3de111a746f14a07164dba/src/config/logger.php#L26 11\. https://github.com/paragonie/halite/blob/8980974467cd54c6d2bb4dd98b2f0e9838570549/autoload.php#L13 fix: 1. change strlen usage to CryptoUtil::safeStrlen or Util::safeStrlen or Binary::safeStrlen or Util::stringLength across the codebase. 2. change substr usage to Util::safeSubstr or CryptoUtil::safeSubstr or Binary::safeSubstr across the codebase.