1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
#!/usr/bin/env python2
"""
Used to generate src/tls/tls_suite_info.cpp
(C) 2011, 2012, 2013 Jack Lloyd
Distributed under the terms of the Botan license
First thing,
wget https://www.iana.org/assignments/tls-parameters/tls-parameters.txt
"""
import sys
import re
import datetime
def to_ciphersuite_info(code, name):
(sig_and_kex,cipher_and_mac) = name.split('_WITH_')
if sig_and_kex == 'RSA':
sig_algo = 'RSA'
kex_algo = 'RSA'
elif 'PSK' in sig_and_kex:
sig_algo = ''
kex_algo = sig_and_kex
elif 'SRP' in sig_and_kex:
srp_info = sig_and_kex.split('_')
if len(srp_info) == 2: # 'SRP_' + hash
kex_algo = sig_and_kex
sig_algo = ''
else:
kex_algo = '_'.join(srp_info[0:-1])
sig_algo = srp_info[-1]
else:
(kex_algo, sig_algo) = sig_and_kex.split('_')
cipher_and_mac = cipher_and_mac.split('_')
mac_algo = cipher_and_mac[-1]
cipher = cipher_and_mac[:-1]
cipher_info = {
'RC4': ('ARC4',None),
'IDEA': ('IDEA',16),
'DES': ('DES',8),
'3DES': ('3DES',24),
'CAMELLIA': ('Camellia',None),
'AES': ('AES',None),
'SEED': ('SEED',16),
'ARIA': ('ARIA',16)
}
tls_to_botan_names = {
'anon': '',
'MD5': 'MD5',
'SHA': 'SHA-1',
'SHA256': 'SHA-256',
'SHA384': 'SHA-384',
'SHA512': 'SHA-512',
'RC4': 'ARC4',
'3DES': 'TripleDES',
'DSS': 'DSA',
'ECDSA': 'ECDSA',
'RSA': 'RSA',
'SRP_SHA': 'SRP_SHA',
'DHE': 'DH',
'DH': 'DH',
'ECDHE': 'ECDH',
'ECDH': 'ECDH',
'': '',
'PSK': 'PSK',
'DHE_PSK': 'DHE_PSK',
'ECDHE_PSK': 'ECDHE_PSK',
}
mac_keylen = {
'MD5': 16,
'SHA-1': 20,
'SHA-256': 32,
'SHA-384': 48,
'SHA-512': 64,
}
mac_algo = tls_to_botan_names[mac_algo]
sig_algo = tls_to_botan_names[sig_algo]
kex_algo = tls_to_botan_names[kex_algo]
(cipher_algo, cipher_keylen) = cipher_info[cipher[0]]
if cipher_keylen is None:
cipher_keylen = int(cipher[1]) / 8
if cipher_algo in ['AES', 'Camellia']:
cipher_algo += '-%d' % (cipher_keylen*8)
modestr = ''
mode = ''
ivlen = 0
if cipher_algo != 'ARC4':
mode = cipher[-1]
if mode not in ['CBC', 'GCM', 'CCM', 'OCB']:
print "#warning Unknown mode %s" % (' '.join(cipher))
ivlen = 8 if cipher_algo == '3DES' else 16
if mode != 'CBC':
cipher_algo += '/' + mode
if cipher_algo != 'ARC4' and mode != 'CBC':
return 'Ciphersuite(0x%s, "%s", "%s", "%s", %d, %d, "AEAD", %d, "%s")' % (
code, sig_algo, kex_algo, cipher_algo, cipher_keylen, 4, 0, mac_algo)
else:
return 'Ciphersuite(0x%s, "%s", "%s", "%s", %d, %d, "%s", %d)' % (
code, sig_algo, kex_algo, cipher_algo, cipher_keylen, ivlen, mac_algo, mac_keylen[mac_algo])
def main(args = None):
if args is None:
args = sys.argv
weak_crypto = ['EXPORT', 'RC2', '_DES_', 'WITH_NULL']
weird_crypto = ['ARIA', 'IDEA']
static_dh = ['ECDH_ECDSA', 'ECDH_RSA', 'DH_DSS', 'DH_RSA']
protocol_goop = ['SCSV', 'KRB5']
just_not_yet = ['RSA_PSK', 'CCM']
not_supported = weak_crypto + weird_crypto + static_dh + protocol_goop + just_not_yet
input = open('tls-parameters.txt')
ciphersuite_re = re.compile(' +0x([0-9a-fA-F][0-9a-fA-F]),0x([0-9a-fA-F][0-9a-fA-F]) + TLS_([A-Za-z_0-9]+) ')
suites = {}
suite_codes = {}
for line in input:
match = ciphersuite_re.match(line)
if match:
code = match.group(1) + match.group(2)
name = match.group(3)
should_use = True
for ns in not_supported:
if ns in name:
should_use = False
if should_use:
suites[name] = (code, to_ciphersuite_info(code, name))
# From http://tools.ietf.org/html/draft-ietf-tls-56-bit-ciphersuites-01
suites['DHE_DSS_WITH_RC4_128_SHA'] = ('0066', to_ciphersuite_info('0066', 'DHE_DSS_WITH_RC4_128_SHA'))
#suites['ECDHE_RSA_WITH_AES_128_OCB_SHA256'] = ('FF66', to_ciphersuite_info('FF66', 'ECDHE_RSA_WITH_AES_128_OCB_SHA256'))
print """/*
* TLS cipher suite information
*
* This file was automatically generated from the IANA assignments
* by %s on %s
*
* Released under the terms of the Botan license
*/
#include <botan/tls_ciphersuite.h>
namespace Botan {
namespace TLS {
Ciphersuite Ciphersuite::by_id(u16bit suite)
{
switch(suite)
{""" % (sys.argv[0], datetime.date.today().strftime("%Y-%m-%d"))
for k in sorted(suites.keys()):
print " case 0x%s: // %s" % (suites[k][0], k)
print " return %s;" % (suites[k][1])
print
print """ }
return Ciphersuite(); // some unknown ciphersuite
}
}
}"""
if __name__ == '__main__':
sys.exit(main())
|
