Start removing scoped_types.h

Initial stab at moving contents of scoped_types.h into
include/openssl/c++ and into the |bssl| namespace.

Started with one file. Will do the remaining ones once this looks good.

Change-Id: I51e2f7c1acbe52d508f1faee7740645f91f56386
Reviewed-on: https://boringssl-review.googlesource.com/9175
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: Adam Langley <agl@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>

crypto/cipher/aead_test.cc

@@ -17,13 +17,13 @@
 
 #include <vector>
 
-#include <openssl/aead.h>
+#include <openssl/c++/aead.h>
 #include <openssl/crypto.h>
 #include <openssl/err.h>
 
 #include "../test/file_test.h"
-#include "../test/scoped_types.h"
 
+namespace bssl {
 
 // This program tests an AEAD against a series of test vectors from a file,
 // using the FileTest format. As an example, here's a valid test case:
@@ -327,7 +327,7 @@ static const struct KnownAEAD kAEADs[] = {
   { "", NULL, false },
 };
 
-int main(int argc, char **argv) {
+static int Main(int argc, char **argv) {
   CRYPTO_library_init();
 
   if (argc != 3) {
@@ -360,3 +360,9 @@ int main(int argc, char **argv) {
 
   return FileTestMain(TestAEAD, const_cast<EVP_AEAD*>(aead), argv[2]);
 }
+
+}  // namespace bssl
+
+int main(int argc, char **argv) {
+  return bssl::Main(argc, argv);
+}

crypto/test/scoped_types.h

@@ -126,9 +126,6 @@ using ScopedX509_STORE_CTX = ScopedOpenSSLType<X509_STORE_CTX, X509_STORE_CTX_fr
 using ScopedX509Stack = ScopedOpenSSLStack<STACK_OF(X509), X509, X509_free>;
 
 using ScopedCBB = ScopedOpenSSLContext<CBB, void, CBB_zero, CBB_cleanup>;
-using ScopedEVP_AEAD_CTX = ScopedOpenSSLContext<EVP_AEAD_CTX, void,
-                                                EVP_AEAD_CTX_zero,
-                                                EVP_AEAD_CTX_cleanup>;
 using ScopedEVP_CIPHER_CTX = ScopedOpenSSLContext<EVP_CIPHER_CTX, int,
                                                   EVP_CIPHER_CTX_init,
                                                   EVP_CIPHER_CTX_cleanup>;

include/openssl/c++/aead.h

@@ -0,0 +1,28 @@
+/* Copyright (c) 2016, Google Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
+
+#ifndef OPENSSL_HEADER_CXX_AEAD_H
+#define OPENSSL_HEADER_CXX_AEAD_H
+
+#include <openssl/aead.h>
+#include <openssl/c++/scoped_helpers.h>
+
+namespace bssl {
+
+using ScopedEVP_AEAD_CTX =
+    ScopedContext<EVP_AEAD_CTX, void, EVP_AEAD_CTX_zero, EVP_AEAD_CTX_cleanup>;
+
+}  // namespace bssl
+
+#endif /* OPENSSL_HEADER_CXX_AEAD_H */

include/openssl/c++/scoped_helpers.h

@@ -0,0 +1,45 @@
+/* Copyright (c) 2016, Google Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
+
+#ifndef OPENSSL_HEADER_CXX_SCOPED_HELPERS_H
+#define OPENSSL_HEADER_CXX_SCOPED_HELPERS_H
+
+namespace bssl {
+
+template<typename T, typename CleanupRet, void (*init_func)(T*),
+         CleanupRet (*cleanup_func)(T*)>
+class ScopedContext {
+ public:
+  ScopedContext() {
+    init_func(&ctx_);
+  }
+  ~ScopedContext() {
+    cleanup_func(&ctx_);
+  }
+
+  T *get() { return &ctx_; }
+  const T *get() const { return &ctx_; }
+
+  void Reset() {
+    cleanup_func(&ctx_);
+    init_func(&ctx_);
+  }
+
+ private:
+  T ctx_;
+};
+
+}  // namespace bssl
+
+#endif /* OPENSSL_HEADER_CXX_SCOPED_HELPERS_H */