1 files changed, 60 insertions, 0 deletions
diff --git a/src/util/hash/win32.h b/src/util/hash/win32.h
new file mode 100644
index 000000000..a9fb87aee
--- /dev/null
+++ b/src/util/hash/win32.h
@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#ifndef INCLUDE_hash_win32_h__
+#define INCLUDE_hash_win32_h__
+
+#include "hash/sha.h"
+
+#include <wincrypt.h>
+
+typedef enum {
+	GIT_HASH_WIN32_INVALID = 0,
+	GIT_HASH_WIN32_CRYPTOAPI,
+	GIT_HASH_WIN32_CNG
+} git_hash_win32_provider_t;
+
+struct git_hash_win32_cryptoapi_ctx {
+	bool valid;
+	HCRYPTHASH hash_handle;
+};
+
+struct git_hash_win32_cng_ctx {
+	bool updated;
+	HANDLE /* BCRYPT_HASH_HANDLE */ hash_handle;
+	PBYTE hash_object;
+};
+
+typedef struct {
+	ALG_ID algorithm;
+
+	union {
+		struct git_hash_win32_cryptoapi_ctx cryptoapi;
+		struct git_hash_win32_cng_ctx cng;
+	} ctx;
+} git_hash_win32_ctx;
+
+/*
+ * Gets/sets the current hash provider (cng or cryptoapi).  This is only
+ * for testing purposes.
+ */
+git_hash_win32_provider_t git_hash_win32_provider(void);
+int git_hash_win32_set_provider(git_hash_win32_provider_t provider);
+
+#ifdef GIT_SHA1_WIN32
+struct git_hash_sha1_ctx {
+	git_hash_win32_ctx win32;
+};
+#endif
+
+#ifdef GIT_SHA256_WIN32
+struct git_hash_sha256_ctx {
+	git_hash_win32_ctx win32;
+};
+#endif
+
+#endif