lib, ipcpd, irmd: Register hash instead of name

All information passed over the IRMd/IPCP boundary for using IPC
services (flow allocation, registration) is now hashed. This
effectively fixes the shared namespace between DIFs and the IRMDs.

This PR also fixes some API issues (adding const identifiers),
shuffles the include headers a bit and some small bugs.

1 files changed, 43 insertions, 0 deletions

diff --git a/src/lib/hash.c b/src/lib/hash.c
new file mode 100644
index 00000000..f4fd75ea
--- /dev/null
+++ b/src/lib/hash.c
@@ -0,0 +1,43 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * Hashing
+ *
+ *    Dimitri Staessens <[email protected]>
+ *    Sander Vrijders   <[email protected]>
+ *
+ * This implementation is adapted and redistributed from the RHASH
+ * project
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * version 2.1 as published by the Free Software Foundation.
+ *
+ * This library 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 this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#include <ouroboros/config.h>
+#include <ouroboros/hash.h>
+
+#include <string.h>
+
+void get_hash(uint8_t      buf[],
+              const char * name)
+{
+        /* currently we only support 256 bit SHA-3 */
+        struct sha3_ctx ctx;
+
+        rhash_sha3_256_init(&ctx);
+
+        rhash_sha3_update(&ctx, name, strlen(name));
+
+        rhash_sha3_final(&ctx, buf);
+}