2016-10-06 01:59:31 +02:00
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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2016-10-25 15:57:30 +02:00
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import struct, os
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import pytest
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2016-10-06 01:59:31 +02:00
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2016-10-25 15:57:30 +02:00
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# pylint: disable=line-too-long,attribute-defined-outside-init
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2016-10-06 01:59:31 +02:00
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class TestSSH2(object):
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@pytest.fixture(autouse=True)
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def init(self, ssh_audit):
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self.ssh = ssh_audit.SSH
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self.ssh2 = ssh_audit.SSH2
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self.rbuf = ssh_audit.ReadBuf
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self.wbuf = ssh_audit.WriteBuf
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2016-10-25 15:57:30 +02:00
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self.audit = ssh_audit.audit
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self.AuditConf = ssh_audit.AuditConf
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def _conf(self):
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conf = self.AuditConf('localhost', 22)
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conf.colors = False
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conf.batch = True
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conf.verbose = True
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conf.ssh1 = False
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conf.ssh2 = True
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return conf
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@classmethod
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def _create_ssh2_packet(cls, payload):
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padding = -(len(payload) + 5) % 8
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if padding < 4:
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padding += 8
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plen = len(payload) + padding + 1
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pad_bytes = b'\x00' * padding
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data = struct.pack('>Ib', plen, padding) + payload + pad_bytes
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return data
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2016-10-06 01:59:31 +02:00
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def _kex_payload(self):
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w = self.wbuf()
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w.write(b'\x00\x11\x22\x33\x44\x55\x66\x77\x88\x99\xaa\xbb\xcc\xdd\xee\xff')
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w.write_list([u'curve25519-sha256@libssh.org', u'ecdh-sha2-nistp256', u'ecdh-sha2-nistp384', u'ecdh-sha2-nistp521', u'diffie-hellman-group-exchange-sha256', u'diffie-hellman-group14-sha1'])
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w.write_list([u'ssh-rsa', u'rsa-sha2-512', u'rsa-sha2-256', u'ssh-ed25519'])
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w.write_list([u'chacha20-poly1305@openssh.com', u'aes128-ctr', u'aes192-ctr', u'aes256-ctr', u'aes128-gcm@openssh.com', u'aes256-gcm@openssh.com', u'aes128-cbc', u'aes192-cbc', u'aes256-cbc'])
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w.write_list([u'chacha20-poly1305@openssh.com', u'aes128-ctr', u'aes192-ctr', u'aes256-ctr', u'aes128-gcm@openssh.com', u'aes256-gcm@openssh.com', u'aes128-cbc', u'aes192-cbc', u'aes256-cbc'])
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w.write_list([u'umac-64-etm@openssh.com', u'umac-128-etm@openssh.com', u'hmac-sha2-256-etm@openssh.com', u'hmac-sha2-512-etm@openssh.com', u'hmac-sha1-etm@openssh.com', u'umac-64@openssh.com', u'umac-128@openssh.com', u'hmac-sha2-256', u'hmac-sha2-512', u'hmac-sha1'])
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w.write_list([u'umac-64-etm@openssh.com', u'umac-128-etm@openssh.com', u'hmac-sha2-256-etm@openssh.com', u'hmac-sha2-512-etm@openssh.com', u'hmac-sha1-etm@openssh.com', u'umac-64@openssh.com', u'umac-128@openssh.com', u'hmac-sha2-256', u'hmac-sha2-512', u'hmac-sha1'])
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w.write_list([u'none', u'zlib@openssh.com'])
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w.write_list([u'none', u'zlib@openssh.com'])
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w.write_list([u''])
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w.write_list([u''])
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w.write_byte(False)
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w.write_int(0)
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return w.write_flush()
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def test_kex_read(self):
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kex = self.ssh2.Kex.parse(self._kex_payload())
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assert kex is not None
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assert kex.cookie == b'\x00\x11\x22\x33\x44\x55\x66\x77\x88\x99\xaa\xbb\xcc\xdd\xee\xff'
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assert kex.kex_algorithms == [u'curve25519-sha256@libssh.org', u'ecdh-sha2-nistp256', u'ecdh-sha2-nistp384', u'ecdh-sha2-nistp521', u'diffie-hellman-group-exchange-sha256', u'diffie-hellman-group14-sha1']
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assert kex.key_algorithms == [u'ssh-rsa', u'rsa-sha2-512', u'rsa-sha2-256', u'ssh-ed25519']
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assert kex.client is not None
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assert kex.server is not None
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assert kex.client.encryption == [u'chacha20-poly1305@openssh.com', u'aes128-ctr', u'aes192-ctr', u'aes256-ctr', u'aes128-gcm@openssh.com', u'aes256-gcm@openssh.com', u'aes128-cbc', u'aes192-cbc', u'aes256-cbc']
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assert kex.server.encryption == [u'chacha20-poly1305@openssh.com', u'aes128-ctr', u'aes192-ctr', u'aes256-ctr', u'aes128-gcm@openssh.com', u'aes256-gcm@openssh.com', u'aes128-cbc', u'aes192-cbc', u'aes256-cbc']
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assert kex.client.mac == [u'umac-64-etm@openssh.com', u'umac-128-etm@openssh.com', u'hmac-sha2-256-etm@openssh.com', u'hmac-sha2-512-etm@openssh.com', u'hmac-sha1-etm@openssh.com', u'umac-64@openssh.com', u'umac-128@openssh.com', u'hmac-sha2-256', u'hmac-sha2-512', u'hmac-sha1']
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assert kex.server.mac == [u'umac-64-etm@openssh.com', u'umac-128-etm@openssh.com', u'hmac-sha2-256-etm@openssh.com', u'hmac-sha2-512-etm@openssh.com', u'hmac-sha1-etm@openssh.com', u'umac-64@openssh.com', u'umac-128@openssh.com', u'hmac-sha2-256', u'hmac-sha2-512', u'hmac-sha1']
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assert kex.client.compression == [u'none', u'zlib@openssh.com']
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assert kex.server.compression == [u'none', u'zlib@openssh.com']
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assert kex.client.languages == [u'']
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assert kex.server.languages == [u'']
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assert kex.follows is False
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assert kex.unused == 0
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2016-10-14 15:17:38 +02:00
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def _get_empty_kex(self, cookie=None):
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kex_algs, key_algs = [], []
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enc, mac, compression, languages = [], [], ['none'], []
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cli = self.ssh2.KexParty(enc, mac, compression, languages)
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enc, mac, compression, languages = [], [], ['none'], []
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srv = self.ssh2.KexParty(enc, mac, compression, languages)
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if cookie is None:
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cookie = os.urandom(16)
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kex = self.ssh2.Kex(cookie, kex_algs, key_algs, cli, srv, 0)
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return kex
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def _get_kex_variat1(self):
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cookie = b'\x00\x11\x22\x33\x44\x55\x66\x77\x88\x99\xaa\xbb\xcc\xdd\xee\xff'
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kex = self._get_empty_kex(cookie)
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kex.kex_algorithms.append('curve25519-sha256@libssh.org')
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kex.kex_algorithms.append('ecdh-sha2-nistp256')
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kex.kex_algorithms.append('ecdh-sha2-nistp384')
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kex.kex_algorithms.append('ecdh-sha2-nistp521')
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kex.kex_algorithms.append('diffie-hellman-group-exchange-sha256')
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kex.kex_algorithms.append('diffie-hellman-group14-sha1')
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kex.key_algorithms.append('ssh-rsa')
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kex.key_algorithms.append('rsa-sha2-512')
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kex.key_algorithms.append('rsa-sha2-256')
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kex.key_algorithms.append('ssh-ed25519')
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kex.server.encryption.append('chacha20-poly1305@openssh.com')
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kex.server.encryption.append('aes128-ctr')
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kex.server.encryption.append('aes192-ctr')
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kex.server.encryption.append('aes256-ctr')
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kex.server.encryption.append('aes128-gcm@openssh.com')
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kex.server.encryption.append('aes256-gcm@openssh.com')
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kex.server.encryption.append('aes128-cbc')
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kex.server.encryption.append('aes192-cbc')
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kex.server.encryption.append('aes256-cbc')
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kex.server.mac.append('umac-64-etm@openssh.com')
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kex.server.mac.append('umac-128-etm@openssh.com')
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kex.server.mac.append('hmac-sha2-256-etm@openssh.com')
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kex.server.mac.append('hmac-sha2-512-etm@openssh.com')
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kex.server.mac.append('hmac-sha1-etm@openssh.com')
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kex.server.mac.append('umac-64@openssh.com')
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kex.server.mac.append('umac-128@openssh.com')
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kex.server.mac.append('hmac-sha2-256')
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kex.server.mac.append('hmac-sha2-512')
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kex.server.mac.append('hmac-sha1')
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kex.server.compression.append('zlib@openssh.com')
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for a in kex.server.encryption:
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kex.client.encryption.append(a)
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for a in kex.server.mac:
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kex.client.mac.append(a)
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for a in kex.server.compression:
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if a == 'none':
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continue
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kex.client.compression.append(a)
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return kex
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def test_key_payload(self):
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kex1 = self._get_kex_variat1()
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kex2 = self.ssh2.Kex.parse(self._kex_payload())
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assert kex1.payload == kex2.payload
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2016-10-25 15:57:30 +02:00
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def test_ssh2_server_simple(self, output_spy, virtual_socket):
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vsocket = virtual_socket
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w = self.wbuf()
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w.write_byte(self.ssh.Protocol.MSG_KEXINIT)
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w.write(self._kex_payload())
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vsocket.rdata.append(b'SSH-2.0-OpenSSH_7.3 ssh-audit-test\r\n')
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vsocket.rdata.append(self._create_ssh2_packet(w.write_flush()))
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output_spy.begin()
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self.audit(self._conf())
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lines = output_spy.flush()
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assert len(lines) == 72
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def test_ssh2_server_invalid_first_packet(self, output_spy, virtual_socket):
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vsocket = virtual_socket
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w = self.wbuf()
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w.write_byte(self.ssh.Protocol.MSG_KEXINIT + 1)
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vsocket.rdata.append(b'SSH-2.0-OpenSSH_7.3 ssh-audit-test\r\n')
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vsocket.rdata.append(self._create_ssh2_packet(w.write_flush()))
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output_spy.begin()
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with pytest.raises(SystemExit):
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self.audit(self._conf())
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lines = output_spy.flush()
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assert len(lines) == 3
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assert 'unknown message' in lines[-1]
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