diff options
Diffstat (limited to 'paramiko/rng_posix.py')
| -rw-r--r-- | paramiko/rng_posix.py | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/paramiko/rng_posix.py b/paramiko/rng_posix.py index 1e6d72c..c4c9691 100644 --- a/paramiko/rng_posix.py +++ b/paramiko/rng_posix.py @@ -43,7 +43,7 @@ def open_rng_device(device_path=None): f = None g = None - + if device_path is None: device_path = "/dev/urandom" @@ -54,7 +54,7 @@ def open_rng_device(device_path=None): f = open(device_path, "rb", 0) except EnvironmentError: raise error("Unable to open /dev/urandom") - + # Open a second file descriptor for sanity checking later. try: g = open(device_path, "rb", 0) @@ -65,17 +65,17 @@ def open_rng_device(device_path=None): st = os.fstat(f.fileno()) # f if stat.S_ISREG(st.st_mode) or not stat.S_ISCHR(st.st_mode): raise error("/dev/urandom is not a character special device") - + st = os.fstat(g.fileno()) # g if stat.S_ISREG(st.st_mode) or not stat.S_ISCHR(st.st_mode): raise error("/dev/urandom is not a character special device") - + # Check that /dev/urandom always returns the number of bytes requested x = f.read(20) y = g.read(20) if len(x) != 20 or len(y) != 20: raise error("Error reading from /dev/urandom: input truncated") - + # Check that different reads return different data if x == y: raise error("/dev/urandom is broken; returning identical data: %r == %r" % (x, y)) |