Fix default installation paths on mingw

Mingw config targets assumed that resulting programs and libraries are
installed in a Unix-like environment and the default installation
prefix was therefore set to '/usr/local'.

However, mingw programs are installed in a Windows environment, and
the installation directories should therefore have Windows defaults,
i.e. the same kind of defaults as the VC config targets.

A difficulty is, however, that a "cross compiled" build can't figure
out the system defaults from environment the same way it's done when
building "natively", so we have to fall back to hard coded defaults in
that case.

Tests can still be performed when cross compiled on a non-Windows
platform, since all tests only depend on the source and build
directory, and otherwise relies on normal local paths.

CVE-2019-1552
Reviewed-by: NMatt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/9400)

CHANGES

@@ -9,6 +9,13 @@
 
  Changes between 1.1.1c and 1.1.1d [xx XXX xxxx]
 
+  *) Use Windows installation paths in the mingw builds
+
+     Mingw isn't a POSIX environment per se, which means that Windows
+     paths should be used for installation.
+     (CVE-2019-1552)
+     [Richard Levitte]
+
   *) Changed DH parameters to generate the order q subgroup instead of 2q.
      Previously generated DH parameters are still accepted by DH_check
      but DH_generate_key works around that by clearing bit 0 of the

Configurations/10-main.conf

@@ -1397,6 +1397,10 @@ my %targets = (
         shared_extension => ".dll",
         multilib         => "",
         apps_aux_src     => add("win32_init.c"),
+        # "WOW" stands for "Windows on Windows", and that word engages
+        # some installation path heuristics in unix-Makefile.tmpl...
+        build_scheme     => add("WOW", { separator => undef }),
+
     },
     "mingw64" => {
         # As for OPENSSL_USE_APPLINK. Applink makes it possible to use

Configurations/unix-Makefile.tmpl

@@ -14,6 +14,26 @@
      our $dsoext = $target{dso_extension} || ".so";
      our $makedepprog = $disabled{makedepend} ? undef : $config{makedepprog};
 
+     # $mingw_installroot and $mingw_commonroot is relevant for mingw only.
+     my $build_scheme = $target{build_scheme};
+     my $install_flavour = $build_scheme->[$#$build_scheme]; # last element
+     my $mingw_installenv = $install_flavour eq "WOW" ? "ProgramFiles(x86)"
+                                                      : "ProgramW6432";
+     my $mingw_commonenv = $install_flavour eq "WOW" ? "CommonProgramFiles(x86)"
+                                                     : "CommonProgramW6432";
+     our $mingw_installroot =
+         defined($ENV{$mingw_installenv}) ? $mingw_installenv : 'ProgramFiles';
+     our $mingw_commonroot =
+         defined($ENV{$mingw_commonenv}) ? $mingw_commonenv : 'CommonProgramFiles';
+     my $mingw_installdflt =
+         $install_flavour eq "WOW" ? "C:/Program Files (x86)"
+                                   : "C:/Program Files";
+     my $mingw_commondflt = "$mingw_installdflt/Common Files";
+
+     # expand variables early
+     $mingw_installroot = $ENV{$mingw_installroot} // $mingw_installdflt;
+     $mingw_commonroot = $ENV{$mingw_commonroot} // $mingw_commondflt;
+
      sub windowsdll { $config{target} =~ /^(?:Cygwin|mingw)/ }
 
      # Shared AIX support is special. We put libcrypto[64].so.ver into
@@ -132,6 +152,7 @@ APPS_OPENSSL={- use File::Spec::Functions;
 # Normally it is left empty.
 DESTDIR=
 
+{- output_off() if $config{target} =~ /^mingw/; "" -}
 # Do not edit these manually. Use Configure with --prefix or --openssldir
 # to change this!  Short explanation in the top comment in Configure
 INSTALLTOP={- # $prefix is used in the OPENSSLDIR perl snippet
@@ -175,6 +196,83 @@ ENGINESDIR=$(libdir)/engines-{- $sover_dirname -}
 # Convenience variable for those who want to set the rpath in shared
 # libraries and applications
 LIBRPATH=$(libdir)
+{- output_on() if $config{target} =~ /^mingw/;
+   output_off() if $config{target} !~ /^mingw/;
+   "" -}
+# Do not edit these manually. Use Configure with --prefix or --openssldir
+# to change this!  Short explanation in the top comment in Configure
+INSTALLTOP_dev={- # $prefix is used in the OPENSSLDIR perl snippet
+                  #
+                  use File::Spec::Win32;
+                  my $prefix_default = "$mingw_installroot/OpenSSL";
+                  our $prefix =
+                      File::Spec::Win32->canonpath($config{prefix}
+                                                  || $prefix_default);
+                  our ($prefix_dev, $prefix_dir, $prefix_file) =
+                      File::Spec::Win32->splitpath($prefix, 1);
+                  $prefix =~ s|\\|/|g;
+                  $prefix_dir =~ s|\\|/|g;
+                  $prefix_dev -}
+INSTALLTOP_dir={- my $x = File::Spec::Win32->canonpath($prefix_dir);
+                  $x =~ s|\\|/|g;
+                  $x -}
+OPENSSLDIR_dev={- #
+                  # The logic here is that if no --openssldir was given,
+                  # OPENSSLDIR will get the value "$mingw_commonroot/SSL".
+                  # If --openssldir was given and the value is an absolute
+                  # path, OPENSSLDIR will get its value without change.
+                  # If the value from --openssldir is a relative path,
+                  # OPENSSLDIR will get $prefix with the --openssldir
+                  # value appended as a subdirectory.
+                  #
+                  use File::Spec::Win32;
+                  our $openssldir =
+                      $config{openssldir} ?
+                          (File::Spec::Win32->file_name_is_absolute($config{openssldir}) ?
+                               File::Spec::Win32->canonpath($config{openssldir})
+                               : File::Spec::Win32->catdir($prefix, $config{openssldir}))
+                          : File::Spec::Win32->canonpath("$mingw_commonroot/SSL");
+                  our ($openssldir_dev, $openssldir_dir, $openssldir_file) =
+                      File::Spec::Win32->splitpath($openssldir, 1);
+                  $openssldir =~ s|\\|/|g;
+                  $openssldir_dir =~ s|\\|/|g;
+                  $openssldir_dev -}
+OPENSSLDIR_dir={- my $x = File::Spec::Win32->canonpath($openssldir_dir);
+                  $x =~ s|\\|/|g;
+                  $x -}
+LIBDIR={- our $libdir = $config{libdir} || "lib";
+          File::Spec::Win32->file_name_is_absolute($libdir) ? "" : $libdir -}
+ENGINESDIR_dev={- use File::Spec::Win32;
+                  our $enginesdir =
+                      File::Spec::Win32->catdir($prefix,$libdir,
+                                                "engines-$sover_dirname");
+                  our ($enginesdir_dev, $enginesdir_dir, $enginesdir_file) =
+                      File::Spec::Win32->splitpath($enginesdir, 1);
+                  $enginesdir =~ s|\\|/|g;
+                  $enginesdir_dir =~ s|\\|/|g;
+                  $enginesdir_dev -}
+ENGINESDIR_dir={- my $x = File::Spec::Win32->canonpath($enginesdir_dir);
+                  $x =~ s|\\|/|g;
+                  $x -}
+# In a Windows environment, $(DESTDIR) is harder to contatenate with other
+# directory variables, because both may contain devices.  What we do here is
+# to adapt INSTALLTOP, OPENSSLDIR and ENGINESDIR depending on if $(DESTDIR)
+# has a value or not, to ensure that concatenation will always work further
+# down.
+ifneq "$(DESTDIR)" ""
+INSTALLTOP=$(INSTALLTOP_dir)
+OPENSSLDIR=$(OPENSSLDIR_dir)
+ENGINESDIR=$(ENGINESDIR_dir)
+else
+INSTALLTOP=$(INSTALLTOP_dev)$(INSTALLTOP_dir)
+OPENSSLDIR=$(OPENSSLDIR_dev)$(OPENSSLDIR_dir)
+ENGINESDIR=$(ENGINESDIR_dev)$(ENGINESDIR_dir)
+endif
+
+# $(libdir) is chosen to be compatible with the GNU coding standards
+libdir={- File::Spec::Win32->file_name_is_absolute($libdir)
+          ? $libdir : '$(INSTALLTOP)/$(LIBDIR)' -}
+{- output_on() if $config{target} !~ /^mingw/; "" -}
 
 MANDIR=$(INSTALLTOP)/share/man
 DOCDIR=$(INSTALLTOP)/share/doc/$(BASENAME)

NOTES.WIN

@@ -109,6 +109,21 @@
    This naturally implies that you've installed corresponding add-on
    packages.
 
+ Independently of the method chosen to build for mingw, the installation
+ paths are similar to those used when building with VC-* targets, except
+ that in case the fallbacks mentioned there aren't possible (typically
+ when cross compiling on Linux), the paths will be the following:
+
+ For mingw:
+
+     PREFIX:      C:/Program Files (x86)/OpenSSL
+     OPENSSLDIR   C:/Program Files (x86)/Common Files/SSL
+
+ For mingw64:
+
+     PREFIX:      C:/Program Files/OpenSSL
+     OPENSSLDIR   C:/Program Files/Common Files/SSL
+
  Linking your application
  ========================