Remove crypto/rand include from test_crypto.c

Create a new test_crypto_openssl to test openssl-only crypto.c
functionality.

src/test/include.am

@@ -91,6 +91,7 @@ src_test_test_SOURCES = \
 	src/test/test_controller.c \
 	src/test/test_controller_events.c \
 	src/test/test_crypto.c \
+	src/test/test_crypto_openssl.c \
 	src/test/test_data.c \
 	src/test/test_dir.c \
 	src/test/test_dir_common.c \

src/test/test.c

@@ -1199,6 +1199,7 @@ struct testgroup_t testgroups[] = {
   { "control/", controller_tests },
   { "control/event/", controller_event_tests },
   { "crypto/", crypto_tests },
+  { "crypto/openssl/", crypto_openssl_tests },
   { "dir/", dir_tests },
   { "dir_handle_get/", dir_handle_get_tests },
   { "dir/md/", microdesc_tests },

src/test/test.h

@@ -194,6 +194,7 @@ extern struct testcase_t container_tests[];
 extern struct testcase_t controller_tests[];
 extern struct testcase_t controller_event_tests[];
 extern struct testcase_t crypto_tests[];
+extern struct testcase_t crypto_openssl_tests[];
 extern struct testcase_t dir_tests[];
 extern struct testcase_t dir_handle_get_tests[];
 extern struct testcase_t entryconn_tests[];

src/test/test_crypto.c

@@ -16,7 +16,6 @@
 #include "ed25519_vectors.inc"
 
 #include <openssl/evp.h>
-#include <openssl/rand.h>
 
 /** Run unit tests for Diffie-Hellman functionality. */
 static void
@@ -331,38 +330,6 @@ test_crypto_rng_strongest(void *arg)
 #undef N
 }
 
-/* Test for rectifying openssl RAND engine. */
-static void
-test_crypto_rng_engine(void *arg)
-{
-  (void)arg;
-  RAND_METHOD dummy_method;
-  memset(&dummy_method, 0, sizeof(dummy_method));
-
-  /* We should be a no-op if we're already on RAND_OpenSSL */
-  tt_int_op(0, ==, crypto_force_rand_ssleay());
-  tt_assert(RAND_get_rand_method() == RAND_OpenSSL());
-
-  /* We should correct the method if it's a dummy. */
-  RAND_set_rand_method(&dummy_method);
-#ifdef LIBRESSL_VERSION_NUMBER
-  /* On libressl, you can't override the RNG. */
-  tt_assert(RAND_get_rand_method() == RAND_OpenSSL());
-  tt_int_op(0, ==, crypto_force_rand_ssleay());
-#else
-  tt_assert(RAND_get_rand_method() == &dummy_method);
-  tt_int_op(1, ==, crypto_force_rand_ssleay());
-#endif
-  tt_assert(RAND_get_rand_method() == RAND_OpenSSL());
-
-  /* Make sure we aren't calling dummy_method */
-  crypto_rand((void *) &dummy_method, sizeof(dummy_method));
-  crypto_rand((void *) &dummy_method, sizeof(dummy_method));
-
- done:
-  ;
-}
-
 /** Run unit tests for our AES128 functionality */
 static void
 test_crypto_aes128(void *arg)
@@ -2941,7 +2908,6 @@ struct testcase_t crypto_tests[] = {
   CRYPTO_LEGACY(formats),
   CRYPTO_LEGACY(rng),
   { "rng_range", test_crypto_rng_range, 0, NULL, NULL },
-  { "rng_engine", test_crypto_rng_engine, TT_FORK, NULL, NULL },
   { "rng_strongest", test_crypto_rng_strongest, TT_FORK, NULL, NULL },
   { "rng_strongest_nosyscall", test_crypto_rng_strongest, TT_FORK,
     &passthrough_setup, (void*)"nosyscall" },

src/test/test_crypto_openssl.c

@@ -0,0 +1,52 @@
+/* Copyright (c) 2001-2004, Roger Dingledine.
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2017, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+#include "orconfig.h"
+
+#define CRYPTO_PRIVATE
+
+#include "crypto.h"
+#include "test.h"
+
+#include <openssl/evp.h>
+#include <openssl/rand.h>
+#include "compat_openssl.h"
+
+/* Test for rectifying openssl RAND engine. */
+static void
+test_crypto_rng_engine(void *arg)
+{
+  (void)arg;
+  RAND_METHOD dummy_method;
+  memset(&dummy_method, 0, sizeof(dummy_method));
+
+  /* We should be a no-op if we're already on RAND_OpenSSL */
+  tt_int_op(0, ==, crypto_force_rand_ssleay());
+  tt_assert(RAND_get_rand_method() == RAND_OpenSSL());
+
+  /* We should correct the method if it's a dummy. */
+  RAND_set_rand_method(&dummy_method);
+#ifdef LIBRESSL_VERSION_NUMBER
+  /* On libressl, you can't override the RNG. */
+  tt_assert(RAND_get_rand_method() == RAND_OpenSSL());
+  tt_int_op(0, ==, crypto_force_rand_ssleay());
+#else
+  tt_assert(RAND_get_rand_method() == &dummy_method);
+  tt_int_op(1, ==, crypto_force_rand_ssleay());
+#endif
+  tt_assert(RAND_get_rand_method() == RAND_OpenSSL());
+
+  /* Make sure we aren't calling dummy_method */
+  crypto_rand((void *) &dummy_method, sizeof(dummy_method));
+  crypto_rand((void *) &dummy_method, sizeof(dummy_method));
+
+ done:
+  ;
+}
+
+struct testcase_t crypto_openssl_tests[] = {
+  { "rng_engine", test_crypto_rng_engine, TT_FORK, NULL, NULL },
+  END_OF_TESTCASES
+};