62 lines
1.6 KiB
Diff
62 lines
1.6 KiB
Diff
From a7afdf46c3193eb102cc6ec2a3b61e8d36794437 Mon Sep 17 00:00:00 2001
|
|
From: Mike Christie <michaelc@cs.wisc.edu>
|
|
Date: Fri, 14 Dec 2012 12:40:27 -0600
|
|
Subject: iscsi tools: fix get_random_bytes error handling
|
|
|
|
Bug report from Rahul:
|
|
|
|
There seems to be a bug in function get_random_bytes(). I reported
|
|
this earlier as well but somehow it didn't appear here.
|
|
|
|
get_random_bytes(unsigned char *data, unsigned int length)
|
|
{
|
|
long r;
|
|
unsigned n;
|
|
int fd;
|
|
|
|
fd = open("/dev/urandom", O_RDONLY);
|
|
while (length > 0) {
|
|
|
|
if (!fd || read(fd, &r, sizeof(long)) != -1) <<<< the condition is
|
|
incorrect
|
|
---
|
|
usr/auth.c | 8 ++++----
|
|
1 file changed, 4 insertions(+), 4 deletions(-)
|
|
|
|
diff --git a/usr/auth.c b/usr/auth.c
|
|
index c924545..4ff0425 100644
|
|
--- a/usr/auth.c
|
|
+++ b/usr/auth.c
|
|
@@ -189,24 +189,24 @@ get_random_bytes(unsigned char *data, unsigned int length)
|
|
|
|
long r;
|
|
unsigned n;
|
|
- int fd;
|
|
+ int fd, r_size = sizeof(r);
|
|
|
|
fd = open("/dev/urandom", O_RDONLY);
|
|
while (length > 0) {
|
|
|
|
- if (!fd || read(fd, &r, sizeof(long)) != -1)
|
|
+ if (fd == -1 || read(fd, &r, r_size) != r_size)
|
|
r = rand();
|
|
r = r ^ (r >> 8);
|
|
r = r ^ (r >> 4);
|
|
n = r & 0x7;
|
|
|
|
- if (!fd || read(fd, &r, sizeof(long)) != -1)
|
|
+ if (fd == -1 || read(fd, &r, r_size) != r_size)
|
|
r = rand();
|
|
r = r ^ (r >> 8);
|
|
r = r ^ (r >> 5);
|
|
n = (n << 3) | (r & 0x7);
|
|
|
|
- if (!fd || read(fd, &r, sizeof(long)) != -1)
|
|
+ if (fd == -1 || read(fd, &r, r_size) != r_size)
|
|
r = rand();
|
|
r = r ^ (r >> 8);
|
|
r = r ^ (r >> 5);
|
|
--
|
|
1.7.11.7
|
|
|