1 files changed, 53 insertions, 0 deletions
diff --git a/src/basic/khash.h b/src/basic/khash.h
new file mode 100644
index 0000000000..f404a68236
--- /dev/null
+++ b/src/basic/khash.h
@@ -0,0 +1,53 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2016 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <inttypes.h>
+#include <sys/types.h>
+#include <sys/uio.h>
+
+#include "macro.h"
+
+typedef struct khash khash;
+
+/* For plain hash functions. Hash functions commonly supported on today's kernels are: crc32c, crct10dif, crc32,
+ * sha224, sha256, sha512, sha384, sha1, md5, md4, sha3-224, sha3-256, sha3-384, sha3-512, and more.*/
+int khash_new(khash **ret, const char *algorithm);
+
+/* For keyed hash functions. Hash functions commonly supported on today's kernels are: hmac(sha256), cmac(aes),
+ * cmac(des3_ede), hmac(sha3-512), hmac(sha3-384), hmac(sha3-256), hmac(sha3-224), hmac(rmd160), hmac(rmd128),
+ * hmac(sha224), hmac(sha512), hmac(sha384), hmac(sha1), hmac(md5), and more. */
+int khash_new_with_key(khash **ret, const char *algorithm, const void *key, size_t key_size);
+
+int khash_dup(khash *h, khash **ret);
+khash* khash_unref(khash *h);
+
+const char *khash_get_algorithm(khash *h);
+size_t khash_get_size(khash *h);
+
+int khash_reset(khash *h);
+
+int khash_put(khash *h, const void *buffer, size_t size);
+int khash_put_iovec(khash *h, const struct iovec *iovec, size_t n);
+
+int khash_digest_data(khash *h, const void **ret);
+int khash_digest_string(khash *h, char **ret);
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(khash*, khash_unref);