From 7cad2aea777893dbacb8ae00aeeff81b319cb7d1 Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Fri, 29 Mar 2002 16:34:20 +0000
Subject: [PATCH] Added a library module for generation of cryptographically
 secure random numbers.

---
 lib/Makefile    |  2 +-
 lib/lib.h       |  4 ++++
 lib/randomkey.c | 22 ++++++++++++++++++++++
 3 files changed, 27 insertions(+), 1 deletion(-)
 create mode 100644 lib/randomkey.c

diff --git a/lib/Makefile b/lib/Makefile
index 9cf5c53b..2ccb3d0a 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -7,7 +7,7 @@ SHLIB_OBJS=alloc.o alloc_str.o ctmatch.o db.o fastbuf.o fb-file.o fb-mem.o lists
 	log.o log2.o md5.o md5hex.o mmap.o pagecache.o patimatch.o patmatch.o pool.o \
 	prime.o random.o realloc.o regex.o timer.o url.o wildmatch.o \
 	wordsplit.o str_ctype.o str_upper.o bucket.o conf.o object.o sorter.o \
-	finger.o proctitle.o ipaccess.o profile.o bitsig.o
+	finger.o proctitle.o ipaccess.o profile.o bitsig.o randomkey.o
 
 obj/lib/libsh.a: $(addprefix obj/lib/,$(SHLIB_OBJS))
 
diff --git a/lib/lib.h b/lib/lib.h
index 22169423..dea7c10c 100644
--- a/lib/lib.h
+++ b/lib/lib.h
@@ -176,4 +176,8 @@ void munmap_file(void *start, unsigned len);
 void setproctitle_init(int argc, char **argv);
 void setproctitle(char *msg, ...) __attribute__((format(printf,1,2)));
 
+/* randomkey.c */
+
+void randomkey(byte *buf, uns size);
+
 #endif
diff --git a/lib/randomkey.c b/lib/randomkey.c
new file mode 100644
index 00000000..03cba197
--- /dev/null
+++ b/lib/randomkey.c
@@ -0,0 +1,22 @@
+/*
+ *	Sherlock Library -- Cryptographically Safe Random Key Generator
+ *
+ *	(c) 2002 Martin Mares <mj@ucw.cz>
+ */
+
+#include "lib/lib.h"
+
+#include <fcntl.h>
+#include <unistd.h>
+
+void
+randomkey(byte *buf, uns size)
+{
+  int fd;
+
+  if ((fd = open("/dev/urandom", O_RDONLY, 0)) < 0)
+    die("Unable to open /dev/urandom: %m");
+  if (read(fd, buf, size) != (int) size)
+    die("Error reading /dev/urandom: %m");
+  close(fd);
+}
-- 
2.39.2