1 files changed, 51 insertions, 0 deletions
diff --git a/common/randstr.c b/common/randstr.c
new file mode 100644
index 0000000..d27ec9f
--- /dev/null
+++ b/common/randstr.c
@@ -0,0 +1,51 @@
+/* randstr.c  --  Functions for getting random data
+ *
+ *  GPLv2 - Copyright (C) 2009  David Sommerseth <dazo@users.sourceforge.net>
+ *
+ *  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, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <openssl/rand.h>
+
+#include <eurephia_nullsafe.h>
+#include <eurephia_context.h>
+#include <eurephia_log.h>
+
+static int rand_init = 0;
+
+// Generate some random data and return a string.
+int eurephia_randstring(eurephiaCTX *ctx, char *rndstr, size_t len) {
+        int attempts = 0;
+        do {
+                if( !rand_init ) {
+                        if( !RAND_load_file("/dev/urandom", 64) ) {
+                                eurephia_log(ctx, LOG_FATAL, 0, "Could not load random data from /dev/urandom");
+                                return 0;
+                        }
+                        rand_init = 1;
+                }
+
+                if( RAND_pseudo_bytes((unsigned char *) rndstr, len) ) {
+                        return 1;
+                }
+                sleep(1);
+                rand_init = 0;
+        } while( attempts++ < 11 );
+        eurephia_log(ctx, LOG_FATAL, 0, "RAND_pseudo_bytes() could not generate enough random data");
+        return 0;
+}