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authordimitri staessens <dimitri.staessens@ugent.be>2017-07-09 10:53:31 +0000
committerSander Vrijders <sander.vrijders@ugent.be>2017-07-09 10:53:31 +0000
commitbebcbf797d1b8703dc5eb67123ccc8a39ee631ed (patch)
treee85e944f99046e583e888bb9f6dded71ef2e07b3 /src/lib/random.c
parent2a395ba451601edb746cfdec1e3d8f260795c765 (diff)
parent93d5edc86b27e0ffa3b6badd4c18cd7f0e23cec9 (diff)
downloadouroboros-bebcbf797d1b8703dc5eb67123ccc8a39ee631ed.tar.gz
ouroboros-bebcbf797d1b8703dc5eb67123ccc8a39ee631ed.zip
Merged in dstaesse/ouroboros/be-rng (pull request #523)
Be rng
Diffstat (limited to 'src/lib/random.c')
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diff --git a/src/lib/random.c b/src/lib/random.c
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+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * Pseudo random generator
+ *
+ * Dimitri Staessens <dimitri.staessens@ugent.be>
+ * Sander Vrijders <sander.vrijders@ugent.be>
+ *
+ * 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/random.h>
+
+#if defined(HAVE_SYS_RANDOM)
+#include <sys/random.h>
+#elif defined(__FreeBSD__)
+#include <stdlib.h>
+#elif defined(HAVE_OPENSSL)
+#include <openssl/rand.h>
+#include <limits.h>
+#endif
+
+int random_buffer(void * buf,
+ size_t len)
+{
+#if defined(HAVE_SYS_RANDOM)
+ return getrandom(buf, len, GRND_NONBLOCK); /* also in glibc 2.25 */
+#elif defined(__FreeBSD__)
+ return arc4random_buf(buf, len);
+#elif defined(HAVE_OPENSSL)
+ if (len > 0 && len < INT_MAX)
+ return RAND_bytes((unsigned char *) buf, (int) len);
+ return -1;
+#else
+ (void) buf;
+ (void) len;
+ return -1;
+#endif
+}