libcacard: initial commit

libcacard emulates a Common Access Card (CAC) which is a standard
for smartcards. It is used by the emulated ccid card introduced in
a following patch. Docs are available in docs/libcacard.txt

Signed-off-by: Alon Levy <alevy@redhat.com>

---

changes from v24->v25:
 * Fix out of tree builds.
 * Fix build with linux-user targets.

changes from v23->v24: (Jes Sorensen review 2)
 * Makefile.target: use obj-$(CONFIG_*) +=
 * remove unrequired includes, include qemu-common before qemu-thread
  * required adding #define NO_NSPR_10_SUPPORT (harmless)

changes from v22->v23:
 * configure fixes: (reported by Stefan Hajnoczi)
  * test a = b, not a == b (second isn't portable)
  * quote $source_path in case it contains spaces
   - this doesn't really help since there are many other places
     that need similar fixes, not introduced by this patch.

changes from v21->v22:
 * fix configure to not link libcacard if nss not found
    (reported by Stefan Hajnoczi)
 * fix vscclient linkage with simpletrace backend
    (reported by Stefan Hajnoczi)
 * card_7816.c: add missing break in ERROR_DATA_NOT_FOUND
    (reported by William van de Velde)

changes from v20->v21: (Jes Sorensen review)
 * use qemu infrastructure: qemu-thread, qemu-common (qemu_malloc
  and qemu_free), error_report
 * assert instead of ASSERT
 * cosmetic fixes
 * use strpbrk and isspace
 * add --disable-nss --enable-nss here, instead of in the final patch.
 * split vscclient, passthru and docs to following patches.

changes from v19->v20:
 * checkpatch.pl

changes from v15->v16:

Build:
 * don't erase self with distclean
 * fix make clean after make distclean
 * Makefile: make vscclient link quiet

Behavioral:
 * vcard_emul_nss: load coolkey in more situations
 * vscclient:
  * use hton,ntoh
  * send init on connect, only start vevent thread on response
  * read payload after header check, before type switch
  * remove Reconnect
  * update for vscard_common changes, empty Flush implementation

Style/Whitespace:
 * fix wrong variable usage
 * remove unused variable
 * use only C style comments
  * add copyright header
  * fix tabulation

Signed-off-by: Alon Levy <alevy@redhat.com>

libcacard: fix out of tree builds

Makefile

@@ -141,6 +141,8 @@ check-qlist: check-qlist.o qlist.o qint.o $(CHECK_PROG_DEPS)
 check-qfloat: check-qfloat.o qfloat.o $(CHECK_PROG_DEPS)
 check-qjson: check-qjson.o qfloat.o qint.o qdict.o qstring.o qlist.o qbool.o qjson.o json-streamer.o json-lexer.o json-parser.o $(CHECK_PROG_DEPS)
 
+QEMULIBS=libhw32 libhw64 libuser libdis libdis-user
+
 clean:
 # avoid old build problems by removing potentially incorrect old files
 	rm -f config.mak op-i386.h opc-i386.h gen-op-i386.h op-arm.h opc-arm.h gen-op-arm.h
@@ -152,7 +154,7 @@ clean:
 	rm -f trace-dtrace.dtrace trace-dtrace.dtrace-timestamp
 	rm -f trace-dtrace.h trace-dtrace.h-timestamp
 	$(MAKE) -C tests clean
-	for d in $(ALL_SUBDIRS) libhw32 libhw64 libuser libdis libdis-user; do \
+	for d in $(ALL_SUBDIRS) $(QEMULIBS) libcacard; do \
 	if test -d $$d; then $(MAKE) -C $$d $@ || exit 1; fi; \
 	rm -f $$d/qemu-options.def; \
         done
@@ -163,7 +165,7 @@ distclean: clean
 	rm -f roms/seabios/config.mak roms/vgabios/config.mak
 	rm -f qemu-doc.info qemu-doc.aux qemu-doc.cp qemu-doc.dvi qemu-doc.fn qemu-doc.info qemu-doc.ky qemu-doc.log qemu-doc.pdf qemu-doc.pg qemu-doc.toc qemu-doc.tp qemu-doc.vr
 	rm -f qemu-tech.info qemu-tech.aux qemu-tech.cp qemu-tech.dvi qemu-tech.fn qemu-tech.info qemu-tech.ky qemu-tech.log qemu-tech.pdf qemu-tech.pg qemu-tech.toc qemu-tech.tp qemu-tech.vr
-	for d in $(TARGET_DIRS) libhw32 libhw64 libuser libdis libdis-user; do \
+	for d in $(TARGET_DIRS) $(QEMULIBS); do \
 	rm -rf $$d || exit 1 ; \
         done
 

Makefile.objs

@@ -352,6 +352,11 @@ user-obj-y += qemu-timer-common.o
 endif
 endif
 
+######################################################################
+# smartcard
+
+libcacard-y = cac.o event.o vcard.o vreader.o vcard_emul_nss.o vcard_emul_type.o card_7816.o
+
 vl.o: QEMU_CFLAGS+=$(GPROF_CFLAGS)
 
 vl.o: QEMU_CFLAGS+=$(SDL_CFLAGS)

Makefile.target

@@ -358,6 +358,12 @@ obj-y += $(addprefix $(HWDIR)/, $(hw-obj-y))
 
 endif # CONFIG_SOFTMMU
 
+ifndef CONFIG_LINUX_USER
+# libcacard needs qemu-thread support, and besides is only needed by devices
+# so not requires with linux-user targets
+obj-$(CONFIG_SMARTCARD_NSS) += $(addprefix ../libcacard/, $(libcacard-y))
+endif # CONFIG_LINUX_USER
+
 obj-y += $(addprefix ../, $(trace-obj-y))
 obj-$(CONFIG_GDBSTUB_XML) += gdbstub-xml.o
 

configure

@@ -176,6 +176,7 @@ trace_file="trace"
 spice=""
 rbd=""
 smartcard=""
+smartcard_nss=""
 
 # parse CC options first
 for opt do
@@ -729,6 +730,10 @@ for opt do
   ;;
   --enable-smartcard) smartcard="yes"
   ;;
+  --disable-smartcard-nss) smartcard_nss="no"
+  ;;
+  --enable-smartcard-nss) smartcard_nss="yes"
+  ;;
   *) echo "ERROR: unknown option $opt"; show_help="yes"
   ;;
   esac
@@ -928,6 +933,8 @@ echo "  --enable-spice           enable spice"
 echo "  --enable-rbd             enable building the rados block device (rbd)"
 echo "  --disable-smartcard      disable smartcard support"
 echo "  --enable-smartcard       enable smartcard support"
+echo "  --disable-smartcard-nss  disable smartcard nss support"
+echo "  --enable-smartcard-nss   enable smartcard nss support"
 echo ""
 echo "NOTE: The object files are built at the place where configure is launched"
 exit 1
@@ -2311,6 +2318,31 @@ EOF
   fi
 fi
 
+# check for libcacard for smartcard support
+if test "$smartcard" != "no" ; then
+    smartcard="yes"
+    smartcard_cflags=""
+    # TODO - what's the minimal nss version we support?
+    if test "$smartcard_nss" != "no"; then
+        if $pkg_config --atleast-version=3.12.8 nss >/dev/null 2>&1 ; then
+            smartcard_nss="yes"
+            smartcard_cflags="-I\$(SRC_PATH)/libcacard"
+            libcacard_libs=$($pkg_config --libs nss 2>/dev/null)
+            libcacard_cflags=$($pkg_config --cflags nss 2>/dev/null)
+            QEMU_CFLAGS="$QEMU_CFLAGS $smartcard_cflags $libcacard_cflags"
+            LIBS="$libcacard_libs $LIBS"
+        else
+            if test "$smartcard_nss" = "yes"; then
+                feature_not_found "nss"
+            fi
+            smartcard_nss="no"
+        fi
+    fi
+fi
+if test "$smartcard" = "no" ; then
+    smartcard_nss="no"
+fi
+
 ##########################################
 
 ##########################################
@@ -2549,6 +2581,7 @@ echo "Trace output file $trace_file-<pid>"
 echo "spice support     $spice"
 echo "rbd support       $rbd"
 echo "xfsctl support    $xfs"
+echo "nss used          $smartcard_nss"
 
 if test $sdl_too_old = "yes"; then
 echo "-> Your SDL version is too old - please upgrade to have SDL support"
@@ -2835,6 +2868,10 @@ if test "$smartcard" = "yes" ; then
   echo "CONFIG_SMARTCARD=y" >> $config_host_mak
 fi
 
+if test "$smartcard_nss" = "yes" ; then
+  echo "CONFIG_SMARTCARD_NSS=y" >> $config_host_mak
+fi
+
 # XXX: suppress that
 if [ "$bsd" = "yes" ] ; then
   echo "CONFIG_BSD=y" >> $config_host_mak
@@ -3183,6 +3220,11 @@ fi
 if test "$target_darwin_user" = "yes" ; then
   echo "CONFIG_DARWIN_USER=y" >> $config_target_mak
 fi
+if test "$smartcard_nss" = "yes" ; then
+  echo "subdir-$target: subdir-libcacard" >> $config_host_mak
+  echo "libcacard_libs=$libcacard_libs" >> $config_host_mak
+  echo "libcacard_cflags=$libcacard_cflags" >> $config_host_mak
+fi
 list=""
 if test ! -z "$gdb_xml_files" ; then
   for x in $gdb_xml_files; do
@@ -3396,6 +3438,13 @@ for hwlib in 32 64; do
   echo "QEMU_CFLAGS+=-DTARGET_PHYS_ADDR_BITS=$hwlib" > $d/config.mak
 done
 
+if [ "$source_path" != `pwd` ]; then
+    # out of tree build
+    mkdir -p libcacard
+    rm -f libcacard/Makefile
+    ln -s "$source_path/libcacard/Makefile" libcacard/Makefile
+fi
+
 d=libuser
 mkdir -p $d
 symlink $source_path/Makefile.user $d/Makefile

libcacard/Makefile

@@ -0,0 +1,20 @@
+-include ../config-host.mak
+-include $(SRC_PATH)/Makefile.objs
+-include $(SRC_PATH)/rules.mak
+
+$(call set-vpath, $(SRC_PATH):$(SRC_PATH)/libcacard)
+
+ifeq ($(CONFIG_WIN32),y)
+QEMU_THREAD=qemu-thread-win32.o
+else
+QEMU_THREAD=qemu-thread-posix.o
+endif
+
+
+QEMU_OBJS=$(addprefix ../, $(QEMU_THREAD) $(oslib-obj-y) $(trace-obj-y) qemu-malloc.o qemu-timer-common.o)
+
+QEMU_CFLAGS+=-I../
+
+clean:
+	rm -f *.o */*.o *.d */*.d *.a */*.a *~ */*~
+