1 files changed, 85 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/ffi/ffi_mac.cpp b/comm/third_party/botan/src/lib/ffi/ffi_mac.cpp
new file mode 100644
index 0000000000..3b6cc3bef4
--- /dev/null
+++ b/comm/third_party/botan/src/lib/ffi/ffi_mac.cpp
@@ -0,0 +1,85 @@
+/*
+* (C) 2015,2017 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include <botan/ffi.h>
+#include <botan/internal/ffi_util.h>
+#include <botan/mac.h>
+
+extern "C" {
+
+using namespace Botan_FFI;
+
+BOTAN_FFI_DECLARE_STRUCT(botan_mac_struct, Botan::MessageAuthenticationCode, 0xA06E8FC1);
+
+int botan_mac_init(botan_mac_t* mac, const char* mac_name, uint32_t flags)
+   {
+   return ffi_guard_thunk(__func__, [=]() -> int {
+      if(!mac || !mac_name || flags != 0)
+         return BOTAN_FFI_ERROR_NULL_POINTER;
+
+      std::unique_ptr<Botan::MessageAuthenticationCode> m =
+         Botan::MessageAuthenticationCode::create(mac_name);
+
+      if(m == nullptr)
+         return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
+
+      *mac = new botan_mac_struct(m.release());
+      return BOTAN_FFI_SUCCESS;
+      });
+   }
+
+int botan_mac_destroy(botan_mac_t mac)
+   {
+   return BOTAN_FFI_CHECKED_DELETE(mac);
+   }
+
+int botan_mac_set_key(botan_mac_t mac, const uint8_t* key, size_t key_len)
+   {
+   return BOTAN_FFI_DO(Botan::MessageAuthenticationCode, mac, m, { m.set_key(key, key_len); });
+   }
+
+int botan_mac_output_length(botan_mac_t mac, size_t* out)
+   {
+   return BOTAN_FFI_DO(Botan::MessageAuthenticationCode, mac, m, { *out = m.output_length(); });
+   }
+
+int botan_mac_clear(botan_mac_t mac)
+   {
+   return BOTAN_FFI_DO(Botan::MessageAuthenticationCode, mac, m, { m.clear(); });
+   }
+
+int botan_mac_update(botan_mac_t mac, const uint8_t* buf, size_t len)
+   {
+   return BOTAN_FFI_DO(Botan::MessageAuthenticationCode, mac, m, { m.update(buf, len); });
+   }
+
+int botan_mac_final(botan_mac_t mac, uint8_t out[])
+   {
+   return BOTAN_FFI_DO(Botan::MessageAuthenticationCode, mac, m, { m.final(out); });
+   }
+
+int botan_mac_name(botan_mac_t mac, char* name, size_t* name_len)
+   {
+   return BOTAN_FFI_DO(Botan::MessageAuthenticationCode, mac, m, {
+      return write_str_output(name, name_len, m.name()); });
+   }
+
+int botan_mac_get_keyspec(botan_mac_t mac,
+                          size_t* out_minimum_keylength,
+                          size_t* out_maximum_keylength,
+                          size_t* out_keylength_modulo)
+   {
+   return BOTAN_FFI_DO(Botan::MessageAuthenticationCode, mac, m, {
+      if(out_minimum_keylength)
+         *out_minimum_keylength = m.minimum_keylength();
+      if(out_maximum_keylength)
+         *out_maximum_keylength = m.maximum_keylength();
+      if(out_keylength_modulo)
+         *out_keylength_modulo = m.key_spec().keylength_multiple();
+      });
+   }
+
+}