1 files changed, 94 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/ffi/ffi_totp.cpp b/comm/third_party/botan/src/lib/ffi/ffi_totp.cpp
new file mode 100644
index 0000000000..9ca8e8e6ae
--- /dev/null
+++ b/comm/third_party/botan/src/lib/ffi/ffi_totp.cpp
@@ -0,0 +1,94 @@
+/*
+* (C) 2018 Jack Lloyd
+*
+* 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_TOTP)
+   #include <botan/otp.h>
+#endif
+
+extern "C" {
+
+using namespace Botan_FFI;
+
+#if defined(BOTAN_HAS_TOTP)
+
+BOTAN_FFI_DECLARE_STRUCT(botan_totp_struct, Botan::TOTP, 0x3D9D2CD1);
+
+#endif
+
+int botan_totp_init(botan_totp_t* totp,
+                    const uint8_t key[], size_t key_len,
+                    const char* hash_algo,
+                    size_t digits,
+                    size_t time_step)
+   {
+   if(totp == nullptr || key == nullptr || hash_algo == nullptr)
+      return BOTAN_FFI_ERROR_NULL_POINTER;
+
+   *totp = nullptr;
+
+#if defined(BOTAN_HAS_TOTP)
+   return ffi_guard_thunk(__func__, [=]() -> int {
+
+      *totp = new botan_totp_struct(
+         new Botan::TOTP(key, key_len, hash_algo, digits, time_step));
+
+      return BOTAN_FFI_SUCCESS;
+      });
+#else
+   BOTAN_UNUSED(totp, key, key_len, hash_algo, digits, time_step);
+   return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
+#endif
+   }
+
+int botan_totp_destroy(botan_totp_t totp)
+   {
+#if defined(BOTAN_HAS_TOTP)
+   return BOTAN_FFI_CHECKED_DELETE(totp);
+#else
+   BOTAN_UNUSED(totp);
+   return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
+#endif
+   }
+
+int botan_totp_generate(botan_totp_t totp,
+                        uint32_t* totp_code,
+                        uint64_t timestamp)
+   {
+#if defined(BOTAN_HAS_TOTP)
+   if(totp == nullptr || totp_code == nullptr)
+      return BOTAN_FFI_ERROR_NULL_POINTER;
+
+   return BOTAN_FFI_DO(Botan::TOTP, totp, t, {
+      *totp_code = t.generate_totp(timestamp);
+      });
+
+#else
+   BOTAN_UNUSED(totp, totp_code, timestamp);
+   return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
+#endif
+   }
+
+int botan_totp_check(botan_totp_t totp,
+                     uint32_t totp_code,
+                     uint64_t timestamp,
+                     size_t acceptable_clock_drift)
+   {
+#if defined(BOTAN_HAS_TOTP)
+   return BOTAN_FFI_RETURNING(Botan::TOTP, totp, t, {
+      const bool ok = t.verify_totp(totp_code, timestamp, acceptable_clock_drift);
+      return (ok ? BOTAN_FFI_SUCCESS : BOTAN_FFI_INVALID_VERIFIER);
+      });
+
+#else
+   BOTAN_UNUSED(totp, totp_code, timestamp, acceptable_clock_drift);
+   return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
+#endif
+   }
+
+}