From b97a28b19d606d6782622a14ae06831b231c94a4 Mon Sep 17 00:00:00 2001 From: Dmitry Belyavskiy Date: Mon, 8 Jul 2019 20:09:13 +1000 Subject: [PATCH] A very brief explanation of how to add custom functions to OpenSSL. Inspired by Rich Salz's letter to openssl-users@ [edited to remove non-ASCII characters and end of line white space] Reviewed-by: Paul Dale (Merged from https://github.com/openssl/openssl/pull/9267) --- HACKING | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 HACKING diff --git a/HACKING b/HACKING new file mode 100644 index 0000000000..a9e39d0258 --- /dev/null +++ b/HACKING @@ -0,0 +1,26 @@ + MODIFYING OPENSSL SOURCE + ------------------------ + This document describes the way to add custom modifications to OpenSSL sources. + + If you are adding new public functions to the custom library build, you need to + either add a prototype in one of the existing OpenSSL header files; + or provide a new header file and edit Configurations/unix-Makefile.tmpl to pick up that file. + + After that perform the following steps: + + ./config -Werror --strict-warnings [your-options] + make update + make + make test + + "make update" ensures that your functions declarations are added to util/libcrypto.num or util/libssl.num + If you plan to submit the changes you made to OpenSSL (see CONTRIBUTING), it's worth running: + + make doc-nits + + after running "make update" to ensure that documentation has correct format. + + "make update" also generates files related to OIDs (in the crypto/objects/ folder) and errors. + If a merge error occurs in one of these generated files then the generated files need to be removed + and regenerated using "make update". + To aid in this process the generated files can be committed separately so they can be removed easily. -- 2.25.1