Add <opensslfeatures.h> to ease migration from OpenSSL.
The <opensslfeatures.h> header provides #defines which are normally
declared by OpenSSL when features are disabled.
This way applications are able to detect which features were removed
from BoringSSL and use it as drop-in replacement for OpenSSL.
Inspired by LibreSSL, which provides similar header.
Change-Id: If4352743fd938267e2640fb09ca851464b9240b9
Signed-off-by: Piotr Sikora <piotr@cloudflare.com>
Reviewed-on: https://boringssl-review.googlesource.com/1191
Reviewed-by: Adam Langley <agl@google.com>
diff --git a/include/openssl/base.h b/include/openssl/base.h
index be9973f..25329c9 100644
--- a/include/openssl/base.h
+++ b/include/openssl/base.h
@@ -58,6 +58,8 @@
#include <string.h>
#include <sys/types.h>
+#include <openssl/opensslfeatures.h>
+
#if defined(__x86_64) || defined(_M_AMD64) || defined(_M_X64)
#define OPENSSL_64_BIT
#define OPENSSL_X86_64
diff --git a/include/openssl/opensslfeatures.h b/include/openssl/opensslfeatures.h
new file mode 100644
index 0000000..9ff2c63
--- /dev/null
+++ b/include/openssl/opensslfeatures.h
@@ -0,0 +1,55 @@
+/* Copyright (c) 2014, 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. */
+
+/* This header is provided in order to make compiling against code that expects
+ OpenSSL easier. */
+
+#ifndef OPENSSL_HEADER_OPENSSLFEATURES_H
+#define OPENSSL_HEADER_OPENSSLFEATURES_H
+
+
+#define OPENSSL_NO_BF
+#define OPENSSL_NO_CAMELLIA
+#define OPENSSL_NO_CAST
+#define OPENSSL_NO_CMS
+#define OPENSSL_NO_COMP
+#define OPENSSL_NO_DANE
+#define OPENSSL_NO_DEPRECATED
+#define OPENSSL_NO_DYNAMIC_ENGINE
+#define OPENSSL_NO_ENGINE
+#define OPENSSL_NO_GMP
+#define OPENSSL_NO_GOST
+#define OPENSSL_NO_HEARTBEATS
+#define OPENSSL_NO_HW
+#define OPENSSL_NO_IDEA
+#define OPENSSL_NO_JPAKE
+#define OPENSSL_NO_KRB5
+#define OPENSSL_NO_MD2
+#define OPENSSL_NO_MD4
+#define OPENSSL_NO_MDC2
+#define OPENSSL_NO_OCSP
+#define OPENSSL_NO_RC2
+#define OPENSSL_NO_RC5
+#define OPENSSL_NO_RFC3779
+#define OPENSSL_NO_RIPEMD
+#define OPENSSL_NO_SCTP
+#define OPENSSL_NO_SEED
+#define OPENSSL_NO_SRP
+#define OPENSSL_NO_SSL2
+#define OPENSSL_NO_STATIC_ENGINE
+#define OPENSSL_NO_STORE
+#define OPENSSL_NO_WHIRLPOOL
+
+
+#endif /* OPENSSL_HEADER_OPENSSLFEATURES_H */
