Remove crypto/rand include from test_crypto.c

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

1 files changed, 52 insertions, 0 deletions

diff --git a/src/test/test_crypto_openssl.c b/src/test/test_crypto_openssl.c
new file mode 100644
index 0000000000..64e33f5fa6
--- /dev/null
+++ b/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
+};