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# Copyright (C) 2003-2009 Robey Pointer <robeypointer@gmail.com>
#
# This file is part of paramiko.
#
# Paramiko is free software; you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation; either version 2.1 of the License, or (at your option)
# any later version.
#
# Paramiko 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 Paramiko; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
"""
Some unit tests for utility functions.
"""
from binascii import hexlify
import os
from hashlib import sha1
import unittest
import paramiko
import paramiko.util
from paramiko.util import safe_string
test_hosts_file = """\
secure.example.com ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAIEA1PD6U2/TVxET6lkpKhOk5r\
9q/kAYG6sP9f5zuUYP8i7FOFp/6ncCEbbtg/lB+A3iidyxoSWl+9jtoyyDOOVX4UIDV9G11Ml8om3\
D+jrpI9cycZHqilK0HmxDeCuxbwyMuaCygU9gS2qoRvNLWZk70OpIKSSpBo0Wl3/XUmz9uhc=
happy.example.com ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAIEA8bP1ZA7DCZDB9J0s50l31M\
BGQ3GQ/Fc7SX6gkpXkwcZryoi4kNFhHu5LvHcZPdxXV1D+uTMfGS1eyd2Yz/DoNWXNAl8TI0cAsW\
5ymME3bQ4J/k1IKxCtz/bAlAqFgKoc+EolMziDYqWIATtW0rYTJvzGAzTmMj80/QpsFH+Pc2M=
"""
class UtilTest(unittest.TestCase):
def test_imports(self):
"""
verify that all the classes can be imported from paramiko.
"""
for name in (
"Agent",
"AgentKey",
"AuthenticationException",
"AuthHandler",
"AuthSource",
"AuthStrategy",
"AutoAddPolicy",
"BadAuthenticationType",
"BufferedFile",
"Channel",
"ChannelException",
"ConfigParseError",
"CouldNotCanonicalize",
"DSSKey",
"HostKeys",
"Message",
"MissingHostKeyPolicy",
"NoneAuth",
"PasswordRequiredException",
"RSAKey",
"RejectPolicy",
"SFTP",
"SFTPAttributes",
"SFTPClient",
"SFTPError",
"SFTPFile",
"SFTPHandle",
"SFTPServer",
"SFTPServerInterface",
"SSHClient",
"SSHConfig",
"SSHConfigDict",
"SSHException",
"SecurityOptions",
"ServerInterface",
"SubsystemHandler",
"Transport",
"WarningPolicy",
"util",
):
assert name in dir(paramiko)
def test_generate_key_bytes(self):
key_bytes = paramiko.util.generate_key_bytes(
sha1, b"ABCDEFGH", "This is my secret passphrase.", 64
)
hexy = "".join([f"{byte:02x}" for byte in key_bytes])
hexpected = "9110e2f6793b69363e58173e9436b13a5a4b339005741d5c680e505f57d871347b4239f14fb5c46e857d5e100424873ba849ac699cea98d729e57b3e84378e8b" # noqa
assert hexy == hexpected
def test_host_keys(self):
with open("hostfile.temp", "w") as f:
f.write(test_hosts_file)
try:
hostdict = paramiko.util.load_host_keys("hostfile.temp")
assert 2 == len(hostdict)
assert 1 == len(list(hostdict.values())[0])
assert 1 == len(list(hostdict.values())[1])
fp = hexlify(
hostdict["secure.example.com"]["ssh-rsa"].get_fingerprint()
).upper()
assert b"E6684DB30E109B67B70FF1DC5C7F1363" == fp
finally:
os.unlink("hostfile.temp")
def test_clamp_value(self):
assert 32768 == paramiko.util.clamp_value(32767, 32768, 32769)
assert 32767 == paramiko.util.clamp_value(32767, 32765, 32769)
assert 32769 == paramiko.util.clamp_value(32767, 32770, 32769)
def test_safe_string(self):
vanilla = b"vanilla"
has_bytes = b"has \7\3 bytes"
safe_vanilla = safe_string(vanilla)
safe_has_bytes = safe_string(has_bytes)
expected_bytes = b"has %07%03 bytes"
err = "{!r} != {!r}"
msg = err.format(safe_vanilla, vanilla)
assert safe_vanilla == vanilla, msg
msg = err.format(safe_has_bytes, expected_bytes)
assert safe_has_bytes == expected_bytes, msg
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