1 files changed, 44 insertions, 0 deletions

diff --git a/src/lib/libcrypto/hidden/crypto_namespace.h b/src/lib/libcrypto/hidden/crypto_namespace.h
new file mode 100644
index 0000000000..6ceef26e2d
--- /dev/null
+++ b/src/lib/libcrypto/hidden/crypto_namespace.h
@@ -0,0 +1,44 @@
+/*      $OpenBSD: crypto_namespace.h,v 1.1 2022/11/11 11:25:18 beck Exp $       */
+/*
+ * Copyright (c) 2016 Philip Guenther <guenther@openbsd.org>
+ *
+ * Permission to use, copy, modify, and 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 _LIBCRYPTO_CRYPTO_NAMESPACE_H_
+#define _LIBCRYPTO_CRYPTO_NAMESPACE_H_
+
+/*
+ * If marked as 'used', then internal calls use the name with prefix "_lcry_"
+ * and we alias that to the normal name *and* the name with prefix "_libre_";
+ * external calls use the latter name.
+ */
+
+#ifdef LIBRESSL_NAMESPACE
+# define LCRYPTO_UNUSED(x)              typeof(x) x __attribute__((deprecated))
+#ifdef LIBRESSL_CRYPTO_NAMESPACE
+#  define LCRYPTO_USED(x)               __attribute__((visibility("hidden")))   \
+                                typeof(x) x asm("_lcry_"#x)
+#  define LCRYPTO_ALIAS1(pre,x) asm(".global "#pre#x"; "#pre#x" = _lcry_"#x)
+#  define LCRYPTO_ALIAS(x)      LCRYPTO_ALIAS1(,x); LCRYPTO_ALIAS1(_libre_,x);
+#else
+#  define LCRYPTO_USED(x)          typeof(x) x asm("_libre_"#x)
+#endif
+#else
+# define LCRYPTO_UNUSED(x)
+# define LCRYPTO_USED(x)
+# define LCRYPTO_ALIAS1(pre,x)
+# define LCRYPTO_ALIAS(x)
+#endif
+
+#endif  /* _LIBCRYPTO_CRYPTO_NAMESPACE_H_ */