Upgrading OpenSSL
-----------------

I. Additional Requirements

1) Install perl and nasm from Cygwin.
   If necessary, add the bin directory to end of %PATH%.
   It has to be at the end so that link.exe comes before /usr/bin/link.

  PATH=%PATH%;C:\cygwin\bin


II. Compiling OpenSSL from source

2) Grab and extract the latest sources from openssl.org
3) Create C:\OpenSSL for installation

  mkdir C:\OpenSSL

4) Open the Visual Studio 2013 Developer Command Prompt
5) cd to the OpenSSL source directory
6) Configure OpenSSL

  perl Configure --prefix=C:\OpenSSL VC-WIN32
  ms\do_nasm.bat

Note #1: The slash after the C: in the configure line is significant
Note #2: You can safely ignore "Compilation failed" messages from do_ms

6a) Configure OpenSSL to build with DEP, ASLR, and SAFESEH:

  perl -pi -e "s|/debug|/NXCOMPAT /DYNAMICBASE /SAFESEH| if /^LFLAGS/" ms\ntdll.mak

7) Compile and Install OpenSSL

  nmake -f ms\ntdll.mak install


III. Making OpenSSL available to Nmap

8) Copy C:\OpenSSL over /nmap-mswin32-aux/OpenSSL.

  rsync -rvC --delete /cygdrive/c/OpenSSL/ nmap-mswin32-aux/OpenSSL/

Note #1: The trailing slashes/ are important to rsync!
Note #2: You should do this from within cygwin because rsync gets confused with
         drive letter syntax.