Allow to build and run sign/digest on Windows
Add some minimal compat type defs, and omit the enable/measure
sources. Also add a way to handle the fact that mingw adds a
.exe extension automatically in the Makefile install rules.
Signed-off-by: Luca Boccassi <luca.boccassi@microsoft.com>
Link: https://lore.kernel.org/r/20201222001033.302274-3-bluca@debian.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
diff --git a/Makefile b/Makefile
index 583db8e..0354f62 100644
--- a/Makefile
+++ b/Makefile
@@ -35,6 +35,12 @@
cc-option = $(shell if $(CC) $(1) -c -x c /dev/null -o /dev/null > /dev/null 2>&1; \
then echo $(1); fi)
+# Support building with MinGW for minimal Windows fsverity.exe, but not for
+# libfsverity. fsverity.exe will be statically linked.
+ifneq ($(findstring -mingw,$(shell $(CC) -dumpmachine 2>/dev/null)),)
+MINGW = 1
+endif
+
CFLAGS ?= -O2
override CFLAGS := -Wall -Wundef \
@@ -62,7 +68,13 @@
INCDIR ?= $(PREFIX)/include
LIBDIR ?= $(PREFIX)/lib
DESTDIR ?=
+ifneq ($(MINGW),1)
PKGCONF ?= pkg-config
+else
+PKGCONF := false
+EXEEXT := .exe
+endif
+FSVERITY := fsverity$(EXEEXT)
# Rebuild if a user-specified setting that affects the build changed.
.build-config: FORCE
@@ -87,9 +99,9 @@
# If we are dynamically linking, when running tests we need to override
# LD_LIBRARY_PATH as no RPATH is set
ifdef USE_SHARED_LIB
-RUN_FSVERITY = LD_LIBRARY_PATH=./ $(TEST_WRAPPER_PROG) ./fsverity
+RUN_FSVERITY = LD_LIBRARY_PATH=./ $(TEST_WRAPPER_PROG) ./$(FSVERITY)
else
-RUN_FSVERITY = $(TEST_WRAPPER_PROG) ./fsverity
+RUN_FSVERITY = $(TEST_WRAPPER_PROG) ./$(FSVERITY)
endif
##############################################################################
@@ -99,6 +111,9 @@
SOVERSION := 0
LIB_CFLAGS := $(CFLAGS) -fvisibility=hidden
LIB_SRC := $(wildcard lib/*.c)
+ifeq ($(MINGW),1)
+LIB_SRC := $(filter-out lib/enable.c,${LIB_SRC})
+endif
LIB_HEADERS := $(wildcard lib/*.h) $(COMMON_HEADERS)
STATIC_LIB_OBJ := $(LIB_SRC:.c=.o)
SHARED_LIB_OBJ := $(LIB_SRC:.c=.shlib.o)
@@ -141,12 +156,15 @@
PROG_COMMON_OBJ := $(PROG_COMMON_SRC:.c=.o)
FSVERITY_PROG_OBJ := $(PROG_COMMON_OBJ) \
programs/cmd_digest.o \
- programs/cmd_enable.o \
- programs/cmd_measure.o \
programs/cmd_sign.o \
programs/fsverity.o
+ifneq ($(MINGW),1)
+FSVERITY_PROG_OBJ += \
+ programs/cmd_enable.o \
+ programs/cmd_measure.o
+endif
TEST_PROG_SRC := $(wildcard programs/test_*.c)
-TEST_PROGRAMS := $(TEST_PROG_SRC:programs/%.c=%)
+TEST_PROGRAMS := $(TEST_PROG_SRC:programs/%.c=%$(EXEEXT))
# Compile program object files
$(ALL_PROG_OBJ): %.o: %.c $(ALL_PROG_HEADERS) .build-config
@@ -154,18 +172,18 @@
# Link the fsverity program
ifdef USE_SHARED_LIB
-fsverity: $(FSVERITY_PROG_OBJ) libfsverity.so
+$(FSVERITY): $(FSVERITY_PROG_OBJ) libfsverity.so
$(QUIET_CCLD) $(CC) -o $@ $(FSVERITY_PROG_OBJ) \
$(CFLAGS) $(LDFLAGS) -L. -lfsverity
else
-fsverity: $(FSVERITY_PROG_OBJ) libfsverity.a
+$(FSVERITY): $(FSVERITY_PROG_OBJ) libfsverity.a
$(QUIET_CCLD) $(CC) -o $@ $+ $(CFLAGS) $(LDFLAGS) $(LDLIBS)
endif
-DEFAULT_TARGETS += fsverity
+DEFAULT_TARGETS += $(FSVERITY)
# Link the test programs
-$(TEST_PROGRAMS): %: programs/%.o $(PROG_COMMON_OBJ) libfsverity.a
+$(TEST_PROGRAMS): %$(EXEEXT): programs/%.o $(PROG_COMMON_OBJ) libfsverity.a
$(QUIET_CCLD) $(CC) -o $@ $+ $(CFLAGS) $(LDFLAGS) $(LDLIBS)
##############################################################################
@@ -184,25 +202,25 @@
# This just runs some quick, portable tests. Use scripts/run-tests.sh if you
# want to run the full tests.
-check:fsverity test_programs
+check:$(FSVERITY) test_programs
for prog in $(TEST_PROGRAMS); do \
$(TEST_WRAPPER_PROG) ./$$prog || exit 1; \
done
$(RUN_FSVERITY) --help > /dev/null
$(RUN_FSVERITY) --version > /dev/null
- $(RUN_FSVERITY) sign fsverity fsverity.sig \
+ $(RUN_FSVERITY) sign $(FSVERITY) fsverity.sig \
--key=testdata/key.pem --cert=testdata/cert.pem > /dev/null
- $(RUN_FSVERITY) sign fsverity fsverity.sig --hash=sha512 \
+ $(RUN_FSVERITY) sign $(FSVERITY) fsverity.sig --hash=sha512 \
--block-size=512 --salt=12345678 \
--key=testdata/key.pem --cert=testdata/cert.pem > /dev/null
- $(RUN_FSVERITY) digest fsverity --hash=sha512 \
+ $(RUN_FSVERITY) digest $(FSVERITY) --hash=sha512 \
--block-size=512 --salt=12345678 > /dev/null
rm -f fsverity.sig
@echo "All tests passed!"
install:all
install -d $(DESTDIR)$(LIBDIR)/pkgconfig $(DESTDIR)$(INCDIR) $(DESTDIR)$(BINDIR)
- install -m755 fsverity $(DESTDIR)$(BINDIR)
+ install -m755 $(FSVERITY) $(DESTDIR)$(BINDIR)
install -m644 libfsverity.a $(DESTDIR)$(LIBDIR)
install -m755 libfsverity.so.$(SOVERSION) $(DESTDIR)$(LIBDIR)
ln -sf libfsverity.so.$(SOVERSION) $(DESTDIR)$(LIBDIR)/libfsverity.so
@@ -215,7 +233,7 @@
chmod 644 $(DESTDIR)$(LIBDIR)/pkgconfig/libfsverity.pc
uninstall:
- rm -f $(DESTDIR)$(BINDIR)/fsverity
+ rm -f $(DESTDIR)$(BINDIR)/$(FSVERITY)
rm -f $(DESTDIR)$(LIBDIR)/libfsverity.a
rm -f $(DESTDIR)$(LIBDIR)/libfsverity.so.$(SOVERSION)
rm -f $(DESTDIR)$(LIBDIR)/libfsverity.so
diff --git a/README.md b/README.md
index 6045c75..2b63488 100644
--- a/README.md
+++ b/README.md
@@ -50,6 +50,17 @@
See the `Makefile` for other supported build and installation options.
+### Building on Windows
+
+There is minimal support for building Windows executables using MinGW.
+```bash
+ make CC=x86_64-w64-mingw32-gcc
+```
+
+`fsverity.exe` will be built, and it supports the `digest` and `sign` commands.
+
+A Windows build of OpenSSL/libcrypto needs to be available.
+
## Examples
### Basic use
diff --git a/common/common_defs.h b/common/common_defs.h
index 279385a..3ae5561 100644
--- a/common/common_defs.h
+++ b/common/common_defs.h
@@ -15,6 +15,8 @@
#include <stddef.h>
#include <stdint.h>
+#include "win32_defs.h"
+
typedef uint8_t u8;
typedef uint16_t u16;
typedef uint32_t u32;
diff --git a/common/fsverity_uapi.h b/common/fsverity_uapi.h
index 33f4415..be1d3f6 100644
--- a/common/fsverity_uapi.h
+++ b/common/fsverity_uapi.h
@@ -10,8 +10,10 @@
#ifndef _UAPI_LINUX_FSVERITY_H
#define _UAPI_LINUX_FSVERITY_H
+#ifndef _WIN32
#include <linux/ioctl.h>
#include <linux/types.h>
+#endif /* _WIN32 */
#define FS_VERITY_HASH_ALG_SHA256 1
#define FS_VERITY_HASH_ALG_SHA512 2
diff --git a/common/win32_defs.h b/common/win32_defs.h
new file mode 100644
index 0000000..29ef9b2
--- /dev/null
+++ b/common/win32_defs.h
@@ -0,0 +1,57 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * WIN32 compat definitions for libfsverity and the 'fsverity' program
+ *
+ * Copyright 2020 Microsoft
+ *
+ * Use of this source code is governed by an MIT-style
+ * license that can be found in the LICENSE file or at
+ * https://opensource.org/licenses/MIT.
+ */
+#ifndef COMMON_WIN32_DEFS_H
+#define COMMON_WIN32_DEFS_H
+
+/* Some minimal definitions to allow the digest/sign commands to run under Windows */
+
+/* All file reads we do need this flag on _WIN32 */
+#ifndef O_BINARY
+# define O_BINARY 0
+#endif
+
+#ifdef _WIN32
+
+#include <stdint.h>
+#include <inttypes.h>
+
+#ifndef ENOPKG
+# define ENOPKG 65
+#endif
+
+#ifndef __cold
+# define __cold
+#endif
+
+/* For %zu in printf() */
+#ifndef __printf
+# define __printf(fmt_idx, vargs_idx) \
+ __attribute__((format(gnu_printf, fmt_idx, vargs_idx)))
+#endif
+
+typedef __signed__ char __s8;
+typedef unsigned char __u8;
+typedef __signed__ short __s16;
+typedef unsigned short __u16;
+typedef __signed__ int __s32;
+typedef unsigned int __u32;
+typedef __signed__ long long __s64;
+typedef unsigned long long __u64;
+typedef __u16 __le16;
+typedef __u16 __be16;
+typedef __u32 __le32;
+typedef __u32 __be32;
+typedef __u64 __le64;
+typedef __u64 __be64;
+
+#endif /* _WIN32 */
+
+#endif /* COMMON_WIN32_DEFS_H */
diff --git a/lib/utils.c b/lib/utils.c
index 13e3b35..036dd60 100644
--- a/lib/utils.c
+++ b/lib/utils.c
@@ -51,6 +51,15 @@
libfsverity_error_cb = cb;
}
+#ifdef _WIN32
+static char *strerror_r(int errnum, char *buf, size_t buflen)
+{
+ strerror_s(buf, buflen, errnum);
+
+ return buf;
+}
+#endif
+
void libfsverity_do_error_msg(const char *format, va_list va, int err)
{
int saved_errno = errno;
diff --git a/programs/fsverity.c b/programs/fsverity.c
index 5d5fbe2..f68e034 100644
--- a/programs/fsverity.c
+++ b/programs/fsverity.c
@@ -28,6 +28,7 @@
" fsverity digest FILE...\n"
" [--hash-alg=HASH_ALG] [--block-size=BLOCK_SIZE] [--salt=SALT]\n"
" [--compact] [--for-builtin-sig]\n"
+#ifndef _WIN32
}, {
.name = "enable",
.func = fsverity_cmd_enable,
@@ -43,6 +44,7 @@
"Display the fs-verity digest of the given verity file(s)",
.usage_str =
" fsverity measure FILE...\n"
+#endif /* _WIN32 */
}, {
.name = "sign",
.func = fsverity_cmd_sign,
diff --git a/programs/utils.c b/programs/utils.c
index facccda..ce19b57 100644
--- a/programs/utils.c
+++ b/programs/utils.c
@@ -102,7 +102,7 @@
bool open_file(struct filedes *file, const char *filename, int flags, int mode)
{
- file->fd = open(filename, flags, mode);
+ file->fd = open(filename, flags | O_BINARY, mode);
if (file->fd < 0) {
error_msg_errno("can't open '%s' for %s", filename,
(flags & O_ACCMODE) == O_RDONLY ? "reading" :
