Move FuzzerSetRand to separate file.

Use an inline rand.inc; this fixes Google's OSS-Fuzz builds.
Reviewed-by: NPaul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/4141)

fuzz/asn1.c

@@ -31,6 +31,8 @@
 #include <openssl/rand.h>
 #include "fuzzer.h"
 
+#include "rand.inc"
+
 static ASN1_ITEM_EXP *item_type[] = {
     ASN1_ITEM_ref(ACCESS_DESCRIPTION),
 #ifndef OPENSSL_NO_RFC3779

fuzz/client.c

@@ -18,6 +18,8 @@
 #include <openssl/err.h>
 #include "fuzzer.h"
 
+#include "rand.inc"
+
 /* unused, to avoid warning. */
 static int idx;
 

fuzz/rand.inc

+/*
+ * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL licenses, (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * https://www.openssl.org/source/license.html
+ * or in the file LICENSE in the source distribution.
+ */
+#include <openssl/rand.h>
+
+static int fuzz_bytes(unsigned char *buf, int num)
+{
+    unsigned char val = 1;
+
+    while (--num >= 0)
+        *buf++ = val++;
+    return 1;
+}
+
+static int fuzz_status(void)
+{
+    return 1;
+}
+
+static RAND_METHOD fuzz_rand_method = {
+    NULL,
+    fuzz_bytes,
+    NULL,
+    NULL,
+    fuzz_bytes,
+    fuzz_status
+};
+
+void FuzzerSetRand(void)
+{
+    RAND_set_rand_method(&fuzz_rand_method);
+}
+
+

fuzz/server.c

@@ -22,6 +22,8 @@
 #include <openssl/err.h>
 #include "fuzzer.h"
 
+#include "rand.inc"
+
 static const uint8_t kCertificateDER[] = {
     0x30, 0x82, 0x02, 0xff, 0x30, 0x82, 0x01, 0xe7, 0xa0, 0x03, 0x02, 0x01,
     0x02, 0x02, 0x11, 0x00, 0xb1, 0x84, 0xee, 0x34, 0x99, 0x98, 0x76, 0xfb,

fuzz/test-corpus.c

@@ -18,39 +18,8 @@
 #include <stdlib.h>
 #include <sys/stat.h>
 #include <openssl/crypto.h>
-#include <openssl/rand.h>
 #include "fuzzer.h"
 
-static int fuzz_bytes(unsigned char *buf, int num)
-{
-    unsigned char val = 1;
-
-    while (--num >= 0)
-        *buf++ = val++;
-    return 1;
-}
-
-static int fuzz_status(void)
-{
-    return 1;
-}
-
-static RAND_METHOD fuzz_rand_method = {
-    NULL,
-    fuzz_bytes,
-    NULL,
-    NULL,
-    fuzz_bytes,
-    fuzz_status
-};
-
-void FuzzerSetRand(void)
-{
-    RAND_set_rand_method(&fuzz_rand_method);
-}
-
-
-
 int main(int argc, char **argv) {
     int n;
 

fuzz/x509.c

@@ -14,6 +14,8 @@
 #include <openssl/rand.h>
 #include "fuzzer.h"
 
+#include "rand.inc"
+
 int FuzzerInitialize(int *argc, char ***argv)
 {
     OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);