1 files changed, 84 insertions, 0 deletions
diff --git a/src/librbd/api/Utils.cc b/src/librbd/api/Utils.cc
new file mode 100644
index 000000000..1ffb2f174
--- /dev/null
+++ b/src/librbd/api/Utils.cc
@@ -0,0 +1,84 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/api/Utils.h"
+#include "common/dout.h"
+
+#if defined(HAVE_LIBCRYPTSETUP)
+#include "librbd/crypto/luks/EncryptionFormat.h"
+#endif
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::api::util: " << __func__ << ": "
+
+namespace librbd {
+namespace api {
+namespace util {
+
+template <typename I>
+int create_encryption_format(
+        CephContext* cct, encryption_format_t format,
+        encryption_options_t opts, size_t opts_size, bool c_api,
+        crypto::EncryptionFormat<I>** result_format) {
+  size_t expected_opts_size;
+  switch (format) {
+#if defined(HAVE_LIBCRYPTSETUP)
+    case RBD_ENCRYPTION_FORMAT_LUKS1: {
+      if (c_api) {
+        expected_opts_size = sizeof(rbd_encryption_luks1_format_options_t);
+        if (expected_opts_size == opts_size) {
+          auto c_opts = (rbd_encryption_luks1_format_options_t*)opts;
+          *result_format = new crypto::luks::LUKS1EncryptionFormat<I>(
+                  c_opts->alg, {c_opts->passphrase, c_opts->passphrase_size});
+        }
+      } else {
+        expected_opts_size = sizeof(encryption_luks1_format_options_t);
+        if (expected_opts_size == opts_size) {
+          auto cpp_opts = (encryption_luks1_format_options_t*)opts;
+          *result_format = new crypto::luks::LUKS1EncryptionFormat<I>(
+                  cpp_opts->alg, std::move(cpp_opts->passphrase));
+        }
+      }
+      break;
+    }
+    case RBD_ENCRYPTION_FORMAT_LUKS2: {
+      if (c_api) {
+        expected_opts_size = sizeof(rbd_encryption_luks2_format_options_t);
+        if (expected_opts_size == opts_size) {
+          auto c_opts = (rbd_encryption_luks2_format_options_t*)opts;
+          *result_format = new crypto::luks::LUKS2EncryptionFormat<I>(
+                  c_opts->alg, {c_opts->passphrase, c_opts->passphrase_size});
+        }
+      } else {
+        expected_opts_size = sizeof(encryption_luks2_format_options_t);
+        if (expected_opts_size == opts_size) {
+          auto cpp_opts = (encryption_luks2_format_options_t*)opts;
+          *result_format = new crypto::luks::LUKS2EncryptionFormat<I>(
+                  cpp_opts->alg, std::move(cpp_opts->passphrase));
+        }
+      }
+      break;
+    }
+#endif
+    default:
+      lderr(cct) << "unsupported encryption format: " << format << dendl;
+      return -ENOTSUP;
+  }
+
+  if (expected_opts_size != opts_size) {
+    lderr(cct) << "expected opts_size: " << expected_opts_size << dendl;
+    return -EINVAL;
+  }
+
+  return 0;
+}
+
+} // namespace util
+} // namespace api
+} // namespace librbd
+
+template int librbd::api::util::create_encryption_format(
+    CephContext* cct, encryption_format_t format, encryption_options_t opts,
+    size_t opts_size, bool c_api,
+    crypto::EncryptionFormat<librbd::ImageCtx>** result_format);