mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-10-07 08:46:53 +02:00
fe0a0b5993
This adds a new routine, pg_strong_random() for generating random bytes, for use in both frontend and backend. At the moment, it's only used in the backend, but the upcoming SCRAM authentication patches need strong random numbers in libpq as well. pg_strong_random() is based on, and replaces, the existing implementation in pgcrypto. It can acquire strong random numbers from a number of sources, depending on what's available: - OpenSSL RAND_bytes(), if built with OpenSSL - On Windows, the native cryptographic functions are used - /dev/urandom Unlike the current pgcrypto function, the source is chosen by configure. That makes it easier to test different implementations, and ensures that we don't accidentally fall back to a less secure implementation, if the primary source fails. All of those methods are quite reliable, it would be pretty surprising for them to fail, so we'd rather find out by failing hard. If no strong random source is available, we fall back to using erand48(), seeded from current timestamp, like PostmasterRandom() was. That isn't cryptographically secure, but allows us to still work on platforms that don't have any of the above stronger sources. Because it's not very secure, the built-in implementation is only used if explicitly requested with --disable-strong-random. This replaces the more complicated Fortuna algorithm we used to have in pgcrypto, which is unfortunate, but all modern platforms have /dev/urandom, so it doesn't seem worth the maintenance effort to keep that. pgcrypto functions that require strong random numbers will be disabled with --disable-strong-random. Original patch by Magnus Hagander, tons of further work by Michael Paquier and me. Discussion: https://www.postgresql.org/message-id/CAB7nPqRy3krN8quR9XujMVVHYtXJ0_60nqgVc6oUk8ygyVkZsA@mail.gmail.com Discussion: https://www.postgresql.org/message-id/CAB7nPqRWkNYRRPJA7-cF+LfroYV10pvjdz6GNvxk-Eee9FypKA@mail.gmail.com
118 lines
3.7 KiB
Makefile
118 lines
3.7 KiB
Makefile
#-------------------------------------------------------------------------
|
|
#
|
|
# Makefile
|
|
# Makefile for the port-specific subsystem of the backend
|
|
#
|
|
# These files are used in other directories for portability on systems
|
|
# with broken/missing library files, and for common code sharing.
|
|
#
|
|
# This makefile generates two outputs:
|
|
#
|
|
# libpgport.a - contains object files with FRONTEND defined,
|
|
# for use by client application and libraries
|
|
#
|
|
# libpgport_srv.a - contains object files without FRONTEND defined,
|
|
# for use only by the backend binaries
|
|
#
|
|
# LIBOBJS is set by configure (via Makefile.global) to be the list of object
|
|
# files that are conditionally needed as determined by configure's probing.
|
|
# OBJS adds additional object files that are always compiled.
|
|
#
|
|
# IDENTIFICATION
|
|
# src/port/Makefile
|
|
#
|
|
#-------------------------------------------------------------------------
|
|
|
|
subdir = src/port
|
|
top_builddir = ../..
|
|
include $(top_builddir)/src/Makefile.global
|
|
|
|
override CPPFLAGS := -I$(top_builddir)/src/port -DFRONTEND $(CPPFLAGS)
|
|
LIBS += $(PTHREAD_LIBS)
|
|
|
|
OBJS = $(LIBOBJS) $(PG_CRC32C_OBJS) chklocale.o erand48.o inet_net_ntop.o \
|
|
noblock.o path.o pgcheckdir.o pgmkdirp.o pgsleep.o \
|
|
pgstrcasecmp.o pqsignal.o \
|
|
qsort.o qsort_arg.o quotes.o sprompt.o tar.o thread.o
|
|
|
|
ifeq ($(enable_strong_random), yes)
|
|
OBJS += pg_strong_random.o
|
|
endif
|
|
|
|
# foo_srv.o and foo.o are both built from foo.c, but only foo.o has -DFRONTEND
|
|
OBJS_SRV = $(OBJS:%.o=%_srv.o)
|
|
|
|
all: libpgport.a libpgport_srv.a
|
|
|
|
# libpgport is needed by some contrib
|
|
install: all installdirs
|
|
$(INSTALL_STLIB) libpgport.a '$(DESTDIR)$(libdir)/libpgport.a'
|
|
|
|
installdirs:
|
|
$(MKDIR_P) '$(DESTDIR)$(libdir)'
|
|
|
|
uninstall:
|
|
rm -f '$(DESTDIR)$(libdir)/libpgport.a'
|
|
|
|
libpgport.a: $(OBJS)
|
|
rm -f $@
|
|
$(AR) $(AROPT) $@ $^
|
|
|
|
# thread.o needs PTHREAD_CFLAGS (but thread_srv.o does not)
|
|
thread.o: CFLAGS+=$(PTHREAD_CFLAGS)
|
|
|
|
# pg_crc32c_sse42.o and its _srv.o version need CFLAGS_SSE42
|
|
pg_crc32c_sse42.o: CFLAGS+=$(CFLAGS_SSE42)
|
|
pg_crc32c_sse42_srv.o: CFLAGS+=$(CFLAGS_SSE42)
|
|
|
|
#
|
|
# Server versions of object files
|
|
#
|
|
|
|
libpgport_srv.a: $(OBJS_SRV)
|
|
rm -f $@
|
|
$(AR) $(AROPT) $@ $^
|
|
|
|
# Because this uses its own compilation rule, it doesn't use the
|
|
# dependency tracking logic from Makefile.global. To make sure that
|
|
# dependency tracking works anyway for the *_srv.o files, depend on
|
|
# their *.o siblings as well, which do have proper dependencies. It's
|
|
# a hack that might fail someday if there is a *_srv.o without a
|
|
# corresponding *.o, but it works for now (and those would probably go
|
|
# into src/backend/port/ anyway).
|
|
%_srv.o: %.c %.o
|
|
$(CC) $(CFLAGS) $(subst -DFRONTEND,, $(CPPFLAGS)) -c $< -o $@
|
|
|
|
$(OBJS_SRV): | submake-errcodes
|
|
|
|
.PHONY: submake-errcodes
|
|
|
|
submake-errcodes:
|
|
$(MAKE) -C ../backend submake-errcodes
|
|
|
|
# Dependency is to ensure that path changes propagate
|
|
|
|
path.o: path.c pg_config_paths.h
|
|
|
|
path_srv.o: path.c pg_config_paths.h
|
|
|
|
# We create a separate file rather than put these in pg_config.h
|
|
# because many of these values come from makefiles and are not
|
|
# available to configure.
|
|
pg_config_paths.h: $(top_builddir)/src/Makefile.global
|
|
echo "#define PGBINDIR \"$(bindir)\"" >$@
|
|
echo "#define PGSHAREDIR \"$(datadir)\"" >>$@
|
|
echo "#define SYSCONFDIR \"$(sysconfdir)\"" >>$@
|
|
echo "#define INCLUDEDIR \"$(includedir)\"" >>$@
|
|
echo "#define PKGINCLUDEDIR \"$(pkgincludedir)\"" >>$@
|
|
echo "#define INCLUDEDIRSERVER \"$(includedir_server)\"" >>$@
|
|
echo "#define LIBDIR \"$(libdir)\"" >>$@
|
|
echo "#define PKGLIBDIR \"$(pkglibdir)\"" >>$@
|
|
echo "#define LOCALEDIR \"$(localedir)\"" >>$@
|
|
echo "#define DOCDIR \"$(docdir)\"" >>$@
|
|
echo "#define HTMLDIR \"$(htmldir)\"" >>$@
|
|
echo "#define MANDIR \"$(mandir)\"" >>$@
|
|
|
|
clean distclean maintainer-clean:
|
|
rm -f libpgport.a libpgport_srv.a $(OBJS) $(OBJS_SRV) pg_config_paths.h
|