Add digital signatures to PDF reports using OpenSSL-generated self-si…

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "external/stb"]
+	path = external/stb
+	url = https://github.com/nothings/stb.git

configure.ac

@@ -2,10 +2,8 @@
 # Process this file with autoconf to produce a configure script.
 
 AC_PREREQ([2.63])
-AC_INIT([nwipe],[0.37],[[email protected]])
-AM_INIT_AUTOMAKE(foreign subdir-objects)
-AC_CONFIG_FILES([Makefile src/Makefile man/Makefile])
-AC_OUTPUT
+AC_INIT([nwipe], [0.37], [[email protected]])
+AM_INIT_AUTOMAKE([foreign subdir-objects])
 AC_CONFIG_SRCDIR([src/nwipe.c])
 AC_CONFIG_HEADERS([config.h])
 
@@ -15,62 +13,66 @@ PKG_PROG_PKG_CONFIG
 
 # Checks for libraries.
 
-PKG_CHECK_MODULES(
-	[PANEL],
-	[panel],
-	[
-		CFLAGS="${CFLAGS} ${PANEL_CFLAGS}"
-		LIBS="${LIBS} ${PANEL_LIBS}"
-	],
-	[AC_CHECK_LIB([panel], [main], [
-		LIBS="-lpanel $LIBS"
-		AC_CHECK_HEADERS(panel.h,, [
-		    AC_CHECK_HEADERS(ncurses/panel.h, [
-			AC_DEFINE([PANEL_IN_SUBDIR], [ncurses/], [Look for ncurses headers in subdir])
-			], [AC_MSG_ERROR([ncurses panel headers not found])])
-		])
-	    ], [AC_MSG_ERROR([ncurses panel library not found])])]
-)
+PKG_CHECK_MODULES([PANEL], [panel],
+    [CFLAGS="${CFLAGS} ${PANEL_CFLAGS}"
+     LIBS="${LIBS} ${PANEL_LIBS}"],
+    [AC_CHECK_LIB([panel], [main],
+        [LIBS="-lpanel $LIBS"
+         AC_CHECK_HEADERS([panel.h],
+             [],
+             [AC_CHECK_HEADERS([ncurses/panel.h],
+                 [AC_DEFINE([PANEL_IN_SUBDIR], ["ncurses/"], [Look for ncurses headers in subdir])],
+                 [AC_MSG_ERROR([ncurses panel headers not found])])])],
+        [AC_MSG_ERROR([ncurses panel library not found])])])
+
+PKG_CHECK_MODULES([NCURSES], [ncurses],
+    [CFLAGS="${CFLAGS} ${NCURSES_CFLAGS}"
+     LIBS="${LIBS} ${NCURSES_LIBS}"],
+    [AC_CHECK_LIB([ncurses], [delscreen],
+        [LIBS="-lncurses $LIBS"
+         AC_CHECK_HEADERS([ncurses.h],
+             [],
+             [AC_CHECK_HEADERS([ncurses/ncurses.h],
+                 [AC_DEFINE([NCURSES_IN_SUBDIR], ["ncurses/"], [Look for ncurses headers in subdir])],
+                 [AC_MSG_ERROR([ncurses headers not found])])])],
+        [AC_MSG_ERROR([ncurses development library not found])])])
+
+PKG_CHECK_MODULES([OPENSSL], [openssl],
+    [CFLAGS="${CFLAGS} ${OPENSSL_CFLAGS}"
+     LIBS="${LIBS} ${OPENSSL_LIBS}"],
+    [AC_CHECK_LIB([ssl], [SSL_library_init],
+        [LIBS="-lssl -lcrypto $LIBS"
+         AC_CHECK_HEADERS([openssl/ssl.h],
+             [],
+             [AC_CHECK_HEADERS([openssl/crypto.h],
+                 [AC_DEFINE([OPENSSL_IN_SUBDIR], ["openssl/"], [Look for openssl headers in subdir])],
+                 [AC_MSG_ERROR([openssl headers not found])])])],
+        [AC_MSG_ERROR([OpenSSL development library not found])])])
 
-PKG_CHECK_MODULES(
-	[NCURSES],
-	[ncurses],
-	[
-		CFLAGS="${CFLAGS} ${NCURSES_CFLAGS}"
-		LIBS="${LIBS} ${NCURSES_LIBS}"
-	],
-	[AC_CHECK_LIB([ncurses], [delscreen], [
-		LIBS="-lncurses $LIBS"
-		AC_CHECK_HEADERS(ncurses.h,, [
-		    AC_CHECK_HEADERS(ncurses/ncurses.h, [
-			AC_DEFINE([NCURSES_IN_SUBDIR], [ncurses/], [Look for ncurses headers in subdir])
-			], [AC_MSG_ERROR([ncurses headers not found])])
-		])
-	    ], [AC_MSG_ERROR([ncurses development library not found])]
-	)]
-)
+PKG_CHECK_MODULES([LIBCONFIG], [libconfig],
+    [CFLAGS="${CFLAGS} ${LIBCONFIG_CFLAGS}"
+     LIBS="${LIBS} ${LIBCONFIG_LIBS}"],
+    [AC_CHECK_LIB([config], [main],
+        [LIBS="-lconfig $LIBS"
+         AC_CHECK_HEADERS([libconfig.h],
+             [],
+             [AC_MSG_ERROR([libconfig headers not found])])],
+        [AC_MSG_ERROR([libconfig library not found])])])
 
-PKG_CHECK_MODULES(
-	[LIBCONFIG],
-	[libconfig],
-	[
-		CFLAGS="${CFLAGS} ${LIBCONFIG_CFLAGS}"
-		LIBS="${LIBS} ${LIBCONFIG_LIBS}"
-	],
-	[AC_CHECK_LIB([libconfig], [main], [
-		LIBS="-llibconfig $LIBS"
-		AC_CHECK_HEADERS(libconfig.h,, [
-		    AC_CHECK_HEADERS(libconfig.h, [
-			AC_DEFINE([LIBCONFIG_IN_SUBDIR], [libconfig/], [Look for libconfig headers in subdir])
-			], [AC_MSG_ERROR([libconfig headers not found])])
-		])
-	    ], [AC_MSG_ERROR([libconfig library not found])])]
-)
+PKG_CHECK_MODULES([QRENCODE], [qrencode],
+    [CFLAGS="${CFLAGS} ${QRENCODE_CFLAGS}"
+     LIBS="${LIBS} ${QRENCODE_LIBS}"],
+    [AC_CHECK_LIB([qrencode], [QRcode_encodeString],
+        [LIBS="-lqrencode $LIBS"
+         AC_CHECK_HEADERS([qrencode.h],
+             [],
+             [AC_MSG_ERROR([QRencode headers not found])])],
+        [AC_MSG_ERROR([QRencode library not found])])])
 
-AC_CHECK_LIB([intl], [libintl_dgettext]) # needed to statically link libparted, but not given in its pkgconfig file
-AC_CHECK_LIB([uuid], [uuid_generate])    # needed to statically link libparted, but not given in its pkgconfig file
-PKG_CHECK_MODULES([PARTED], [libparted])
-AC_CHECK_LIB([pthread], [main], ,[AC_MSG_ERROR([pthread development library not found])])
+AC_CHECK_LIB([intl], [libintl_dgettext], [], [])
+AC_CHECK_LIB([uuid], [uuid_generate], [], [])
+PKG_CHECK_MODULES([PARTED], [libparted], [], [AC_MSG_ERROR([libparted not found])])
+AC_CHECK_LIB([pthread], [main], [], [AC_MSG_ERROR([pthread development library not found])])
 
 # Checks for header files.
 AC_CHECK_HEADERS([libconfig.h fcntl.h inttypes.h netinet/in.h stddef.h stdint.h stdlib.h string.h sys/file.h sys/ioctl.h unistd.h])
@@ -83,4 +85,16 @@ AC_CHECK_MEMBERS([struct stat.st_blksize])
 AC_FUNC_MALLOC
 AC_CHECK_FUNCS([fdatasync memset regcomp strdup strerror])
 
+# Initialize and update git submodules if necessary.
+AC_MSG_CHECKING([whether git submodules need to be initialized])
+AS_IF([test -d ".git" && test -f ".gitmodules"],
+    [git submodule status 2>/dev/null | grep -q "^[-+]" && (
+        AC_MSG_RESULT([yes])
+        AC_MSG_NOTICE([Initializing and updating git submodules...])
+        git submodule init && git submodule update || AC_MSG_ERROR([Failed to initialize or update git submodules])
+    ) || AC_MSG_RESULT([no])],
+    [AC_MSG_NOTICE([No git repository or submodules found. Skipping submodule initialization.])])
+
+AC_CONFIG_FILES([Makefile src/Makefile man/Makefile])
 AC_OUTPUT
+

src/Makefile.am

@@ -1,6 +1,6 @@
 # what flags you want to pass to the C compiler & linker
 #CFLAGS = -lncurses -lparted
-AM_CFLAGS =
+AM_CFLAGS = -I$(srcdir)/external/stb
 AM_LDFLAGS =
 
 # this lists the binaries to produce, the (non-PHONY, binary) targets in