# We place all implementations in static libraries, and then let the
# provider mains pilfer what they want through symbol resolution when
# linking.
#
# The non-legacy implementations (libimplementations) must be made FIPS
# agnostic as much as possible, as well as the common building blocks
# (libcommon).  The legacy implementations (liblegacy) will never be
# part of the FIPS provider.
#
# If there is anything that isn't FIPS agnostic, it should be set aside
# in its own source file, which is then included directly into other
# static libraries geared for FIPS and non-FIPS providers, and built
# separately.
#
# libcommon.a           Contains common building blocks, potentially
#                       needed both by non-legacy and legacy code.
#
# libimplementations.a  Contains all non-legacy implementations.
# liblegacy.a           Contains all legacy implementations.
#
# libfips.a             Contains all things needed to support
#                       FIPS implementations, such as code from
#                       crypto/ and object files that contain
#                       FIPS-specific code.  FIPS_MODULE is defined
#                       for this library.  The FIPS module uses
#                       this.
# libnonfips.a          Corresponds to libfips.a, but built with
#                       FIPS_MODULE undefined.  The default and legacy
#                       providers use this.
#
# This is how different provider modules should be linked:
#
# FIPS:
#     -o fips.so {object files...} libimplementations.a libcommon.a libfips.a
# Non-FIPS:
#     -o module.so {object files...} libimplementations.a libcommon.a libnonfips.a
#
# It is crucial that code that checks for the FIPS_MODULE macro end up in
# libfips.a and libnonfips.a, never in libcommon.a.
# It is crucial that such code is written so libfips.a and libnonfips.a doesn't
# end up depending on libimplementations.a or libcommon.a.
# It is crucial that such code is written so libcommon.a doesn't end up
# depending on libimplementations.a.
#
# Code in providers/implementations/ should be written in such a way that the
# OSSL_DISPATCH arrays (and preferably the majority of the actual code) ends
# up in either libimplementations.a or liblegacy.a.
# If need be, write an abstraction layer in separate source files and make them
# libfips.a / libnonfips.a sources.

SUBDIRS=common implementations

INCLUDE[../libcrypto]=common/include

# Libraries we're dealing with
$LIBCOMMON=libcommon.a
$LIBIMPLEMENTATIONS=libimplementations.a
$LIBLEGACY=liblegacy.a
$LIBNONFIPS=libnonfips.a
$LIBFIPS=libfips.a

# Enough of our implementations include prov/ciphercommon.h (present in
# providers/implementations/include), which includes crypto/*_platform.h
# (present in include), which in turn may include very internal header
# files in crypto/, so let's have a common include list for them all.
$COMMON_INCLUDES=../crypto ../include implementations/include common/include

INCLUDE[$LIBCOMMON]=$COMMON_INCLUDES
INCLUDE[$LIBIMPLEMENTATIONS]=.. $COMMON_INCLUDES
INCLUDE[$LIBLEGACY]=.. $COMMON_INCLUDES
INCLUDE[$LIBNONFIPS]=.. $COMMON_INCLUDES
INCLUDE[$LIBFIPS]=.. $COMMON_INCLUDES
DEFINE[$LIBFIPS]=FIPS_MODULE

# Weak dependencies to provide library order information.
# We make it weak so they aren't both used always; what is
# actually used is determined by non-weak dependencies.
DEPEND[$LIBIMPLEMENTATIONS]{weak}=$LIBFIPS $LIBNONFIPS
DEPEND[$LIBCOMMON]{weak}=$LIBFIPS

# Strong dependencies.  This ensures that any time libimplementations
# is used, libcommon gets included as well.
DEPEND[$LIBIMPLEMENTATIONS]=$LIBCOMMON
DEPEND[$LIBNONFIPS]=../libcrypto
# It's tempting to make libcommon depend on ../libcrypto.  However,
# since the FIPS provider module must NOT depend on ../libcrypto, we
# need to set that dependency up specifically for the final products
# that use $LIBCOMMON or anything that depends on it.

# Libraries common to all providers, must be built regardless
LIBS{noinst}=$LIBCOMMON
# Libraries that are common for all non-FIPS providers, must be built regardless
LIBS{noinst}=$LIBNONFIPS $LIBIMPLEMENTATIONS

#
# Default provider stuff
#
# Because the default provider is built in, it means that libcrypto must
# include all the object files that are needed (we do that indirectly,
# by using the appropriate libraries as source).  Note that for shared
# libraries, SOURCEd libraries are considered as if the where specified
# with DEPEND.
$DEFAULTGOAL=../libcrypto
SOURCE[$DEFAULTGOAL]=$LIBIMPLEMENTATIONS $LIBNONFIPS
SOURCE[$DEFAULTGOAL]=defltprov.c
# Some legacy implementations depend on provider header files
INCLUDE[$DEFAULTGOAL]=implementations/include

LIBS=$DEFAULTGOAL

#
# FIPS provider stuff
#
# We define it this way to ensure that configdata.pm will have all the
# necessary information even if we don't build the module.  This will allow
# us to make all kinds of checks on the source, based on what we specify in
# diverse build.info files.  libfips.a, fips.so and their sources aren't
# built unless the proper LIBS or MODULES statement has been seen, so we
# have those and only those within a condition.
SUBDIRS=fips
$FIPSGOAL=fips
DEPEND[$FIPSGOAL]=$LIBIMPLEMENTATIONS $LIBFIPS
INCLUDE[$FIPSGOAL]=../include
DEFINE[$FIPSGOAL]=FIPS_MODULE
IF[{- defined $target{shared_defflag} -}]
  SOURCE[$FIPSGOAL]=fips.ld
  GENERATE[fips.ld]=../util/providers.num
ENDIF

IF[{- !$disabled{fips} -}]
  # This is the trigger to actually build the FIPS module.  Without these
  # statements, the final build file will not have a trace of it.
  MODULES=$FIPSGOAL
  LIBS{noinst}=$LIBFIPS
ENDIF

#
# Legacy provider stuff
#
IF[{- !$disabled{legacy} -}]
  # The legacy implementation library
  LIBS{noinst}=$LIBLEGACY
  DEPEND[$LIBLEGACY]=$LIBCOMMON $LIBNONFIPS

  # The Legacy provider
  IF[{- $disabled{module} -}]
    # Become built in
    # In this case, we need to do the same thing a for the default provider,
    # and make the liblegacy object files end up in libcrypto.  We could also
    # just say that for the built-in legacy, we put the source directly in
    # libcrypto instead of going via liblegacy, but that makes writing the
    # implementation specific build.info files harder to write, so we don't.
    $LEGACYGOAL=../libcrypto
    SOURCE[$LEGACYGOAL]=$LIBLEGACY
    DEFINE[$LIBLEGACY]=STATIC_LEGACY
    DEFINE[$LEGACYGOAL]=STATIC_LEGACY
  ELSE
    # Become a module
    # In this case, we can work with dependencies
    $LEGACYGOAL=legacy
    MODULES=$LEGACYGOAL
    DEPEND[$LEGACYGOAL]=$LIBLEGACY
    IF[{- defined $target{shared_defflag} -}]
      SOURCE[legacy]=legacy.ld
      GENERATE[legacy.ld]=../util/providers.num
    ENDIF
  ENDIF

  # Common things that are valid no matter what form the Legacy provider
  # takes.
  SOURCE[$LEGACYGOAL]=legacyprov.c
  INCLUDE[$LEGACYGOAL]=../include implementations/include common/include
ENDIF

#
# Null provider stuff
#
# Because the null provider is built in, it means that libcrypto must
# include all the object files that are needed.
$NULLGOAL=../libcrypto
SOURCE[$NULLGOAL]=nullprov.c