lib: add minisign ed25519 public-key cryptography api

Author: Duncaen

configure

@@ -282,7 +282,7 @@ for f in all extra error shadow "format=2" missing-prototypes \
 	missing-include-dirs old-style-definition \
 	init-self redundant-decls float-equal missing-noreturn \
 	cast-align cast-qual pointer-arith comment \
-	declaration-after-statement write-strings stack-protector; do
+	write-strings stack-protector; do
 	check_compiler_flag ${f} W
 done
 
@@ -613,6 +613,48 @@ else
 fi
 rm -f _$func.c _$func
 
+#
+# Check for getrandom().
+#
+func=getrandom
+printf "Checking for $func() ... "
+cat <<EOF > _$func.c
+#include <sys/random.h>
+int main(void) {
+	char buf[16];
+	getrandom(buf, sizeof(buf), 0);
+	return 0;
+}
+EOF
+if $XCC _$func.c -o _$func 2>/dev/null; then
+	echo yes.
+	echo "CPPFLAGS += -DHAVE_GETRANDOM" >>$CONFIG_MK
+else
+	echo no.
+fi
+rm -f _$func.c _$func
+
+#
+# Check for arc4random_buf().
+#
+func=arc4random_buf
+printf "Checking for $func() ... "
+cat <<EOF > _$func.c
+#include <stdlib.h>
+int main(void) {
+	char buf[16];
+	arc4random_buf(buf, sizeof(buf));
+	return 0;
+}
+EOF
+if $XCC _$func.c -o _$func 2>/dev/null; then
+	echo yes.
+	echo "CPPFLAGS += -DHAVE_ARC4RANDOM_BUF" >>$CONFIG_MK
+else
+	echo no.
+fi
+rm -f _$func.c _$func
+
 #
 # zlib is required.
 #
@@ -757,6 +799,8 @@ if [ "$SET_RPATH" ]; then
 	sed -i 's,XORIGIN,$$ORIGIN,' $CONFIG_MK
 fi
 
+echo "CFLAGS += -Wno-error=deprecated-declarations" >>$CONFIG_MK
+
 echo
 echo "  XBPS has been configured with the following options:"
 echo

include/Makefile

@@ -10,7 +10,7 @@ all:
 install:
 	install -d $(DESTDIR)$(INCLUDEDIR)/xbps
 	install -m 644 $(INCS) $(DESTDIR)$(INCLUDEDIR)
-	for f in array bool data dictionary number object string; do \
+	for f in array bool data dictionary number object string crypto; do \
 		install -m 644 xbps/xbps_$${f}.h $(DESTDIR)$(INCLUDEDIR)/xbps; \
 	done
 

include/macro.h

@@ -0,0 +1,47 @@
+#ifndef XBPS_MACRO_H
+#define XBPS_MACRO_H
+
+#include <stdio.h>
+
+/*
+ * By default all public functions have default visibility, unless
+ * visibility has been detected by configure and the HIDDEN definition
+ * is used.
+ */
+#if HAVE_VISIBILITY
+#define HIDDEN __attribute__ ((visibility("hidden")))
+#else
+#define HIDDEN
+#endif
+
+#ifndef __UNCONST
+#define __UNCONST(a)	((void *)(uintptr_t)(const void *)(a))
+#endif
+
+#ifndef __arraycount
+#define __arraycount(x) (sizeof(x) / sizeof(*x))
+#endif
+
+
+/* XXX: struct_size overflow check */
+#define struct_size(p, member, count) \
+		((sizeof(*(p)->member) * count) + sizeof(*(p)))
+
+#ifndef container_of
+#define container_of(ptr, type, member) ({                      \
+        void *__mptr = (void *)(ptr);                           \
+        ((type *)(__mptr - offsetof(type, member))); })
+#endif
+
+#if 0
+#undef assert
+#define assert(expr) do { \
+	if (!(expr)) { \
+		fprintf(stderr, "assert failed %s\n", #expr); \
+		abort(); \
+	} \
+} while(0)
+#endif
+
+
+#endif /*!XBPS_MACRO_H*/