This document describes the coding style for the OpenSSL project. It is is derived from the Linux kernel coding style, which can be found at: https://www.kernel.org/doc/Documentation/CodingStyle This guide is not distributed as part of OpenSSL itself. Since it is derived from the Linux Kernel Coding Style, it is distributed under the terms of the kernel license, available here: https://www.kernel.org/pub/linux/kernel/COPYING
Coding style is all about readability and maintainability using commonly available tools. OpenSSL coding style is simple. Avoid tricky expressions.