3 files changed, 182 insertions, 0 deletions
diff --git a/utils/socket_fuzzing/Makefile b/utils/socket_fuzzing/Makefile
new file mode 100644
index 00000000..9476e2d5
--- /dev/null
+++ b/utils/socket_fuzzing/Makefile
@@ -0,0 +1,61 @@
+#
+# american fuzzy lop++ - socket_fuzz
+# ----------------------------------
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+
+.PHONY: all install clean
+
+PREFIX     ?= /usr/local
+BIN_PATH    = $(PREFIX)/bin
+HELPER_PATH = $(PREFIX)/lib/afl
+
+CFLAGS = -fPIC -Wall -Wextra
+LDFLAGS = -shared
+
+UNAME_SAYS_LINUX=$(shell uname | grep -E '^Linux|^GNU' >/dev/null; echo $$?)
+UNAME_SAYS_LINUX:sh=uname | grep -E '^Linux|^GNU' >/dev/null; echo $$?
+
+_LDFLAGS_ADD=$(UNAME_SAYS_LINUX:1=)
+LDFLAGS_ADD=$(_LDFLAGS_ADD:0=-ldl)
+LDFLAGS  += $(LDFLAGS_ADD)
+
+# on gcc for arm there is no -m32, but -mbe32
+M32FLAG = -m32
+M64FLAG = -m64
+
+CC_IS_GCC=$(shell $(CC) --version 2>/dev/null | grep -q gcc; echo $$?)
+CC_IS_GCC:sh=$(CC) --version 2>/dev/null | grep -q gcc; echo $$?
+CC_IS_ARMCOMPILER=$(shell $(CC) -v 2>&1 >/dev/null | grep -q arm; echo $$?)
+CC_IS_ARMCOMPILER:sh=$(CC) -v 2>&1 >/dev/null | grep -q arm; echo $$?
+
+_M32FLAG=$(CC_IS_GCC)$(CC_IS_ARMCOMPILER)
+__M32FLAG=$(_M32FLAG:00=-mbe32)
+___M32FLAG=$(__M32FLAG:$(CC_IS_GCC)$(CC_IS_ARMCOMPILER)=-m32)
+M32FLAG=$(___M32FLAG)
+#ifeq "$(findstring clang, $(shell $(CC) --version 2>/dev/null))" ""
+# ifneq (,$(findstring arm, "$(shell $(CC) -v 2>&1 >/dev/null)"))
+#  M32FLAG = -mbe32
+# endif
+#endif
+
+all: socketfuzz32.so socketfuzz64.so
+
+socketfuzz32.so: socketfuzz.c
+	-@$(CC) $(M32FLAG) $(CFLAGS) $^ $(LDFLAGS) -o $@ 2>/dev/null || echo "socketfuzz32 build failure (that's fine)"
+
+socketfuzz64.so: socketfuzz.c
+	-@$(CC) $(M64FLAG) $(CFLAGS) $^ $(LDFLAGS) -o $@ 2>/dev/null || echo "socketfuzz64 build failure (that's fine)"
+
+install: socketfuzz32.so socketfuzz64.so
+	install -d -m 755 $(DESTDIR)$(HELPER_PATH)/
+	if [ -f socketfuzz32.so ]; then set -e; install -m 755 socketfuzz32.so $(DESTDIR)$(HELPER_PATH)/; fi
+	if [ -f socketfuzz64.so ]; then set -e; install -m 755 socketfuzz64.so $(DESTDIR)$(HELPER_PATH)/; fi
+
+clean:
+	rm -f socketfuzz32.so socketfuzz64.so
diff --git a/utils/socket_fuzzing/README.md b/utils/socket_fuzzing/README.md
new file mode 100644
index 00000000..79f28bea
--- /dev/null
+++ b/utils/socket_fuzzing/README.md
@@ -0,0 +1,11 @@
+# socketfuzz
+
+when you want to fuzz a network service and you can not/do not want to modify
+the source (or just have a binary), then this LD_PRELOAD library will allow
+for sending input to stdin which the target binary will think is coming from
+a network socket.
+
+This is desock_dup.c from the amazing preeny project
+https://github.com/zardus/preeny
+
+It is packaged in afl++ to have it at hand if needed
diff --git a/utils/socket_fuzzing/socketfuzz.c b/utils/socket_fuzzing/socketfuzz.c
new file mode 100644
index 00000000..3ec8383b
--- /dev/null
+++ b/utils/socket_fuzzing/socketfuzz.c
@@ -0,0 +1,110 @@
+/*
+ * This is desock_dup.c from the amazing preeny project
+ * https://github.com/zardus/preeny
+ *
+ * It is packaged in afl++ to have it at hand if needed
+ *
+ */
+
+#define _GNU_SOURCE
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/types.h>   //
+#include <sys/socket.h>  //
+#include <sys/stat.h>    //
+#include <fcntl.h>       //
+#include <netinet/in.h>
+#include <pthread.h>
+#include <signal.h>
+#include <dlfcn.h>
+#include <errno.h>
+#include <stdio.h>
+#include <poll.h>
+//#include "logging.h" // switche from preeny_info() to fprintf(stderr, "Info: "
+
+//
+// originals
+//
+int (*original_close)(int);
+int (*original_dup2)(int, int);
+__attribute__((constructor)) void preeny_desock_dup_orig() {
+
+  original_close = dlsym(RTLD_NEXT, "close");
+  original_dup2 = dlsym(RTLD_NEXT, "dup2");
+
+}
+
+int close(int sockfd) {
+
+  if (sockfd <= 2) {
+
+    fprintf(stderr, "Info: Disabling close on %d\n", sockfd);
+    return 0;
+
+  } else {
+
+    return original_close(sockfd);
+
+  }
+
+}
+
+int dup2(int old, int new) {
+
+  if (new <= 2) {
+
+    fprintf(stderr, "Info: Disabling dup from %d to %d\n", old, new);
+    return 0;
+
+  } else {
+
+    return original_dup2(old, new);
+
+  }
+
+}
+
+int accept(int sockfd, struct sockaddr *addr, socklen_t *addrlen) {
+
+  (void)sockfd;
+  (void)addr;
+  (void)addrlen;
+  fprintf(stderr, "Info: Emulating accept on %d\n", sockfd);
+  return 0;
+
+}
+
+int bind(int sockfd, const struct sockaddr *addr, socklen_t addrlen) {
+
+  (void)sockfd;
+  (void)addr;
+  (void)addrlen;
+  fprintf(stderr, "Info: Emulating bind on port %d\n",
+          ntohs(((struct sockaddr_in *)addr)->sin_port));
+  return 0;
+
+}
+
+int listen(int sockfd, int backlog) {
+
+  (void)sockfd;
+  (void)backlog;
+  return 0;
+
+}
+
+int setsockopt(int sockfd, int level, int optid, const void *optdata,
+               socklen_t optdatalen) {
+
+  (void)sockfd;
+  (void)level;
+  (void)optid;
+  (void)optdata;
+  (void)optdatalen;
+  return 0;
+
+}
+