Implement balloon password hashing

1 files changed, 54 insertions, 0 deletions

diff --git a/balloon-sha1.c b/balloon-sha1.c
new file mode 100644
index 00000000..7238b487
--- /dev/null
+++ b/balloon-sha1.c
@@ -0,0 +1,54 @@
+/* balloon-sha1.c
+
+   Balloon password-hashing algorithm.
+
+   Copyright (C) 2022 Zoltan Fridrich
+
+   This file is part of GNU Nettle.
+
+   GNU Nettle is free software: you can redistribute it and/or
+   modify it under the terms of either:
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at your
+       option) any later version.
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at your
+       option) any later version.
+
+   or both in parallel, as here.
+
+   GNU Nettle is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see http://www.gnu.org/licenses/.
+*/
+
+#if HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include "balloon.h"
+#include "sha1.h"
+
+void
+balloon_sha1(size_t s_cost, size_t t_cost,
+             size_t passwd_length, const uint8_t *passwd,
+             size_t salt_length, const uint8_t *salt,
+             uint8_t *scratch, uint8_t *dst)
+{
+  struct sha1_ctx ctx;
+  sha1_init(&ctx);
+  balloon(&ctx,
+          (nettle_hash_update_func*)sha1_update,
+          (nettle_hash_digest_func*)sha1_digest,
+          SHA1_DIGEST_SIZE, s_cost, t_cost,
+          passwd_length, passwd, salt_length, salt, scratch, dst);
+}