Add a hash helper

[onak.git] / hash-helper.h

diff --git a/hash-helper.h b/hash-helper.h
new file mode 100644 (file)
index 0000000..adb217c
--- /dev/null
+++ b/hash-helper.h
@@ -0,0 +1,65 @@
+/*
+ * hash-helper.h - Helper functions for calculating hashes
+ *
+ * Copyright Jonathan McDowell <noodles@earth.li>
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; version 2 of the License.
+ *
+ * This program 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 a copy of the GNU General Public License along with
+ * this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __HASH_HELPER_H__
+#define __HASH_HELPER_H__
+
+#include <stdint.h>
+
+#include "build-config.h"
+
+#ifdef HAVE_NETTLE
+#include <nettle/md5.h>
+#include <nettle/ripemd160.h>
+#include <nettle/sha.h>
+#else
+#include "md5.h"
+#include "sha1.h"
+#endif
+
+#include "onak.h"
+#include "sha1x.h"
+
+#define MAX_HASH_CHUNKS                8
+
+struct onak_hash_ctx {
+       uint8_t type;
+       union {
+               struct sha1_ctx sha1;
+               struct sha1x_ctx sha1x;
+               struct md5_ctx md5;
+#ifdef HAVE_NETTLE
+               struct ripemd160_ctx ripemd160;
+               struct sha224_ctx sha224;
+               struct sha256_ctx sha256;
+               struct sha384_ctx sha384;
+               struct sha512_ctx sha512;
+#endif
+       };
+};
+
+struct onak_hash_data {
+       uint8_t hashtype;
+       uint8_t chunks;
+       size_t len[MAX_HASH_CHUNKS];
+       uint8_t *data[MAX_HASH_CHUNKS];
+};
+
+onak_status_t onak_hash(struct onak_hash_data *data, uint8_t *hash);
+
+#endif /* __HASH_HELPER_H__ */