1 files changed, 50 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/ffi/ffi_keywrap.cpp b/comm/third_party/botan/src/lib/ffi/ffi_keywrap.cpp
new file mode 100644
index 0000000000..f74904cb7f
--- /dev/null
+++ b/comm/third_party/botan/src/lib/ffi/ffi_keywrap.cpp
@@ -0,0 +1,50 @@
+/*
+* (C) 2017 Ribose Inc
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include <botan/ffi.h>
+#include <botan/internal/ffi_util.h>
+
+#if defined(BOTAN_HAS_RFC3394_KEYWRAP)
+   #include <botan/rfc3394.h>
+#endif
+
+extern "C" {
+
+using namespace Botan_FFI;
+
+int botan_key_wrap3394(const uint8_t key[], size_t key_len,
+                       const uint8_t kek[], size_t kek_len,
+                       uint8_t wrapped_key[], size_t* wrapped_key_len)
+   {
+#if defined(BOTAN_HAS_RFC3394_KEYWRAP)
+   return ffi_guard_thunk(__func__, [=]() -> int {
+      const Botan::SymmetricKey kek_sym(kek, kek_len);
+      const Botan::secure_vector<uint8_t> key_pt(key, key + key_len);
+      const Botan::secure_vector<uint8_t> key_ct = Botan::rfc3394_keywrap(key_pt, kek_sym);
+      return write_vec_output(wrapped_key, wrapped_key_len, key_ct);
+      });
+#else
+   return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
+#endif
+   }
+
+int botan_key_unwrap3394(const uint8_t wrapped_key[], size_t wrapped_key_len,
+                         const uint8_t kek[], size_t kek_len,
+                         uint8_t key[], size_t* key_len)
+   {
+#if defined(BOTAN_HAS_RFC3394_KEYWRAP)
+   return ffi_guard_thunk(__func__, [=]() -> int {
+      const Botan::SymmetricKey kek_sym(kek, kek_len);
+      const Botan::secure_vector<uint8_t> key_ct(wrapped_key, wrapped_key + wrapped_key_len);
+      const Botan::secure_vector<uint8_t> key_pt = Botan::rfc3394_keyunwrap(key_ct, kek_sym);
+      return write_vec_output(key, key_len, key_pt);
+      });
+#else
+   return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
+#endif
+   }
+
+}